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wifipineapple-openwrt/target/linux/amazon/files/drivers/atm/amazon_tpe.c

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/*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
//-----------------------------------------------------------------------
/*
* Description:
* Driver for Infineon Amazon TPE
*/
//-----------------------------------------------------------------------
/* Author: peng.liu@infineon.com
* Created: 12-April-2004
*/
//-----------------------------------------------------------------------
/* History
* Last changed on: 13 Oct. 2004
* Last changed by: peng.liu@infineon.com
* Last changed on: 28 Jan. 2004
* Last changed by: peng.liu@infineon.com
* Last changed Reason:
* - AAL5R may send more bytes than expected in MFL (so far, confirmed as 64 bytes)
*/
// 507261:tc.chen 2005/07/26 re-organize code address map to improve performance.
// 507281:tc.chen 2005/07/28 fix f4 segment isssue
/* 511045:linmars 2005/11/04 from Liu.Peng: change NRT_VBR bandwidth calculation based on scr instead of pcr */
#ifndef __KERNEL__
#define __KERNEL__
#endif
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
/*TPE level loopback, bypass AWARE DFE */
#undef TPE_LOOPBACK
/* enable debug options */
#undef AMAZON_ATM_DEBUG
/* enable rx error packet analysis */
#undef AMAZON_ATM_DEBUG_RX
/* test AAL5 Interrupt */
#undef AMAZON_TPE_TEST_AAL5_INT
/* dump packet */
#undef AMAZON_TPE_DUMP
/* read ARC register*/
/* this register is located in side DFE module*/
#undef AMAZON_TPE_READ_ARC
/* software controlled reassembly */
#undef AMAZON_TPE_SCR
/* recovery from AAL5 bug */
#undef AMAZON_TPE_AAL5_RECOVERY
#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
#define ALPHAEUS_BASE_ADDR 0x31c00
#define A_CFG_ADDR (ALPHAEUS_BASE_ADDR+0x04)
#define AR_CB0_STATUS_ADDR (ALPHAEUS_BASE_ADDR+0x2c)
#define AR_CB1_STATUS_ADDR (ALPHAEUS_BASE_ADDR+0x30)
#define AT_CELL0_ADDR (ALPHAEUS_BASE_ADDR+0x90)
#define AR_CELL0_ADDR (ALPHAEUS_BASE_ADDR+0x1a0)
#define AR_CD_CNT0_ADDR (ALPHAEUS_BASE_ADDR+0x1c8)
#endif
#include <linux/module.h>
#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/atm.h>
#include <linux/atmdev.h>
#include <linux/netdevice.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/atomic.h>
#include <asm/bitops.h>
#include <asm/system.h>
#include <asm/amazon/amazon.h>
#include <asm/amazon/irq.h>
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <linux/in6.h>
#include <linux/delay.h>
#include <asm/amazon/atm_defines.h>
#include <asm/amazon/amazon_dma.h>
#include <asm/amazon/amazon_tpe.h>
#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
#include <asm/amazon/amazon_mei.h>
#include <asm/amazon/amazon_mei_app.h>
#endif
#define AMAZON_TPE_EMSG(fmt, args...) printk( KERN_ERR "%s: " fmt,__FUNCTION__, ## args)
/***************************************** External Functions *******************************************/
extern unsigned int amazon_get_fpi_hz(void);
extern void mask_and_ack_amazon_irq(unsigned int irq_nr);
extern void amz_push_oam(unsigned char *);
//amazon_mei.c
#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
extern MEI_ERROR meiDebugRead(u32 srcaddr, u32 *databuff, u32 databuffsize);
extern MEI_ERROR meiDebugWrite(u32 destaddr, u32 *databuff, u32 databuffsize);
#endif
/***************************************** Internal Functions *******************************************/
int amazon_atm_read_procmem(char *buf, char **start, off_t offset,int count, int *eof, void *data);
/***************************************** Global Data *******************************************/
amazon_atm_dev_t g_atm_dev; //device data
static struct tq_struct swex_start_task; //BH task
static struct tq_struct swex_complete_task; //BH task
#ifdef AMAZON_TPE_SCR
static struct tq_struct a5r_task; //BH task
#endif
static struct dma_device_info g_dma_dev; //for DMA
static struct atm_dev * amazon_atm_devs[AMAZON_ATM_PORT_NUM];
static struct oam_last_activity g_oam_time_stamp[AMAZON_ATM_MAX_VCC_NUM];
static u8 g_oam_cell[AMAZON_AAL0_SDU+4]; //for OAM cells
#ifdef AMAZON_CHECK_LINK
static int adsl_link_status; //ADSL link status, 0:down, 1:up
#endif //AMAZON_CHECK_LINK
/***************************************** Module Parameters *************************************/
// Parameter Definition for module
static int port_enable0 = 1; // Variable for parameter port_enable0
static int port_enable1 = 0; // Variable for parameter port_enable1
static int port_max_conn0 = 15; // Variable for parameter port_max_conn0
static int port_max_conn1 = 0; // Variable for parameter port_max_conn1
static int port_cell_rate_up0 = 7500; // Variable for parameter port_cell_rate_up0
static int port_cell_rate_up1 = 7500; // Variable for parameter port_cell_rate_up1
static int qsb_tau = 1; // Variable for parameter qsb_tau
static int qsb_srvm = 0xf; // Variable for parameter qsb_srvm
static int qsb_tstep = 4 ; // Variable for parameter qsb_tstep
static int cbm_nrt = 3900; // Variable for parameter cbm_nrt
static int cbm_clp0 =3500; // Variable for parameter cbm_clp0
static int cbm_clp1 =3200; // Variable for parameter cbm_clp1
static int cbm_free_cell_no = AMAZON_ATM_FREE_CELLS; // Variable for parameter cbm_free_cell_no
static int a5_fill_pattern = 0x7e; // Variable for parameter a5_fill_pattern '~'
static int a5s_mtu = 0x700; // mtu for tx
static int a5r_mtu = 0x700; // mtu for rx
static int oam_q_threshold = 64; // oam queue threshold, minium value 64
static int rx_q_threshold = 1000; // rx queue threshold, minium value 64
static int tx_q_threshold = 800; // tx queue threshold, minium value 64
MODULE_PARM(port_max_conn0, "i");
MODULE_PARM_DESC(port_max_conn0, "Maximum atm connection for port #0");
MODULE_PARM(port_max_conn1, "i");
MODULE_PARM_DESC(port_max_conn1, "Maximum atm connection for port #1");
MODULE_PARM(port_enable0, "i");
MODULE_PARM_DESC(port_enable0, "0 -> port disabled, 1->port enabled");
MODULE_PARM(port_enable1, "i");
MODULE_PARM_DESC(port_enable1, "0 -> port disabled, 1->port enabled");
MODULE_PARM(port_cell_rate_up0, "i");
MODULE_PARM_DESC(port_cell_rate_up0, "ATM port upstream rate in cells/s");
MODULE_PARM(port_cell_rate_up1, "i");
MODULE_PARM_DESC(port_cell_rate_up1, "ATM port upstream rate in cells/s");
MODULE_PARM(qsb_tau,"i");
MODULE_PARM_DESC(qsb_tau, "Cell delay variation. value must be > 0");
MODULE_PARM(qsb_srvm, "i");
MODULE_PARM_DESC(qsb_srvm, "Maximum burst size");
MODULE_PARM(qsb_tstep, "i");
MODULE_PARM_DESC(qsb_tstep, "n*32 cycles per sbs cycles n=1,2,4");
MODULE_PARM(cbm_nrt, "i");
MODULE_PARM_DESC(cbm_nrt, "Non real time threshold for cell buffer");
MODULE_PARM(cbm_clp0, "i");
MODULE_PARM_DESC(cbm_clp0, "Threshold for cells with cell loss priority 0");
MODULE_PARM(cbm_clp1, "i");
MODULE_PARM_DESC(cbm_clp1, "Threshold for cells with cell loss priority 1");
MODULE_PARM(cbm_free_cell_no, "i");
MODULE_PARM_DESC(cbm_free_cell_no, "Number of cells in the cell buffer manager");
MODULE_PARM(a5_fill_pattern, "i");
MODULE_PARM_DESC(a5_fill_pattern, "filling pattern (PAD) for aal5 frames");
MODULE_PARM(a5s_mtu, "i");
MODULE_PARM_DESC(a5s_mtu, "max. SDU for upstream");
MODULE_PARM(a5r_mtu, "i");
MODULE_PARM_DESC(a5r_mtu, "max. SDU for downstream");
MODULE_PARM(oam_q_threshold, "i");
MODULE_PARM_DESC(oam_q_threshold, "oam queue threshold");
MODULE_PARM(rx_q_threshold, "i");
MODULE_PARM_DESC(rx_q_threshold, "downstream/rx queue threshold");
MODULE_PARM(tx_q_threshold, "i");
MODULE_PARM_DESC(tx_q_threshold, "upstream/tx queue threshold");
/***************************************** local functions *************************************/
/* Brief: valid QID
* Return: 1 if valid
* 0 if not
*/
static inline int valid_qid(int qid)
{
return ( (qid>0) && (qid<AMAZON_ATM_MAX_QUEUE_NUM));
}
/*
* Brief: align to 16 bytes boundary
* Parameter:
* skb
* Description:
* use skb_reserve to adjust the data pointer
* don't change head pointer
* pls allocate extrac 16 bytes before call this function
*/
static void inline alloc_align_16(struct sk_buff * skb)
{
if ( ( ((u32) (skb->data)) & 15) != 0){
AMAZON_TPE_DMSG("need to adjust the alignment manually\n");
skb_reserve(skb, 16 - (((u32) (skb->data)) & 15) );
}
}
/*
* Brief: initialize the device according to the module paramters
* Return: not NULL - ok
* NULL - fails
* Description: arrange load parameters and call the hardware initialization routines
*/
static void atm_init_parameters(amazon_atm_dev_t *dev)
{
//port setting
dev->ports[0].enable = port_enable0;
dev->ports[0].max_conn = port_max_conn0;
dev->ports[0].tx_max_cr = port_cell_rate_up0;
if (port_enable1){
dev->ports[1].enable = port_enable1;
dev->ports[1].max_conn = port_max_conn1;
dev->ports[1].tx_max_cr = port_cell_rate_up1;
}
//aal5
dev->aal5.padding_byte = a5_fill_pattern;
dev->aal5.tx_max_sdu = a5s_mtu;
dev->aal5.rx_max_sdu = a5r_mtu;
//cbm
dev->cbm.nrt_thr = cbm_nrt;
dev->cbm.clp0_thr = cbm_clp0;
dev->cbm.clp1_thr = cbm_clp1;
dev->cbm.free_cell_cnt = cbm_free_cell_no;
//qsb
dev->qsb.tau = qsb_tau;
dev->qsb.tstepc =qsb_tstep;
dev->qsb.sbl = qsb_srvm;
//allocate on the fly
dev->cbm.mem_addr = NULL;
dev->cbm.qd_addr = NULL;
}
/* Brief: Find QID for VCC
* Parameters: vcc - VCC data structure
* Return Value: -EINVAL - VCC not found
* qid - QID for this VCC
* Description:
* This function returns the QID of a given VCC
*/
static int amazon_atm_get_queue(struct atm_vcc* vcc)
{
int i;
for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
if (g_atm_dev.queues[i].vcc == vcc) return i;
}
return -EINVAL;
}
/*
* Brief: Find QID for VPI/VCI
* Parameters: vpi - VPI to found
* vci - VCI to found
*
* Return Value: -EINVAL - VPI/VCI not found
* qid - QID for this VPI/VCI
*
* Description:
* This function returns the QID for a given VPI/VCI. itf doesn't matter
*/
static int amazon_atm_find_vpivci(u8 vpi, u16 vci)
{
int i;
struct atm_vcc * vcc;
for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
if ( (vcc = g_atm_dev.queues[i].vcc)!= NULL) {
if ((vcc->vpi == vpi) && (vcc->vci == vci)) return i;
}
}
return -EINVAL;
}
/* Brief: Find QID for VPI
* Parameters: vpi - VPI to found
* Return Value: -EINVAL - VPI not found
* qid - QID for this VPI
*
* Description:
* This function returns the QID for a given VPI. itf and VCI don't matter
*/
static int amazon_atm_find_vpi(u8 vpi)
{
int i;
for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
if ( g_atm_dev.queues[i].vcc!= NULL) {
if (g_atm_dev.queues[i].vcc->vpi == vpi) return i;
}
}
return -EINVAL;
}
/*
* Brief: Clears QID entries for VCC
*
* Parameters: vcc - VCC to found
*
* Description:
* This function searches for the given VCC and sets it to NULL if found.
*/
static inline void amazon_atm_clear_vcc(int i)
{
g_atm_dev.queues[i].vcc = NULL;
g_atm_dev.queues[i].free = 1;
}
/*
* Brief: dump skb data
*/
static inline void dump_skb(u32 len, char * data)
{
#ifdef AMAZON_TPE_DUMP
int i;
for(i=0;i<len;i++){
printk("%2.2x ",(u8)(data[i]));
if (i % 16 == 15)
printk("\n");
}
printk("\n");
#endif
}
/*
* Brief: dump queue descriptor
*/
static inline void dump_qd(int qid)
{
#ifdef AMAZON_TPE_DUMP
u8 * qd_addr;
if (valid_qid(qid) != 1) return;
qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
AMAZON_TPE_EMSG("qid: %u [%8x][%8x][%8x][%8x]\n", qid
,readl(qd_addr+qid*CBM_QD_SIZE+0x0)
,readl(qd_addr+qid*CBM_QD_SIZE+0x4)
,readl(qd_addr+qid*CBM_QD_SIZE+0x8)
,readl(qd_addr+qid*CBM_QD_SIZE+0xc));
#endif
}
/*
* Brief: release TX skbuff
*/
static inline void amazon_atm_free_tx_skb_vcc(struct atm_vcc *vcc, struct sk_buff *skb)
{
if ( vcc->pop != NULL) {
vcc->pop(vcc, skb);
} else {
dev_kfree_skb_any(skb);
}
}
/*
* Brief: release TX skbuff
*/
static inline void amazon_atm_free_tx_skb(struct sk_buff *skb)
{
struct atm_vcc* vcc = ATM_SKB(skb)->vcc;
if (vcc!=NULL){
amazon_atm_free_tx_skb_vcc(vcc,skb);
} else {
dev_kfree_skb_any(skb);//fchang:Added
}
}
/* Brief: divide by 64 and round up
*/
static inline u32 divide_by_64_round_up(int input)
{
u32 tmp1;
tmp1 = (u32) input;
tmp1 = (tmp1%64)?(tmp1/64 + 1): (tmp1/64);
if (tmp1 == 0) tmp1 = 1;
return tmp1;
}
/*
* Brief: statistics
*/
#ifdef AMAZON_ATM_DEBUG
static inline void queue_statics(int qid, qs_t idx)
{
if (valid_qid(qid)){
g_atm_dev.queues[qid].qs[idx]++;
}
}
#else //not AMAZON_ATM_DEBUG
static inline void queue_statics(int qid, qs_t idx){}
#endif //AMAZON_ATM_DEBUG
/* Brief: set dma tx full, i.e. there is no available descriptors
*/
static void inline atm_dma_full(void)
{
AMAZON_TPE_DMSG("ch0 is full\n");
atomic_set(&g_atm_dev.dma_tx_free_0,0);
}
/*
* Brief set dma tx free (at least one descript is available)
*/
inline static void atm_dma_free(void)
{
AMAZON_TPE_DMSG("ch0 is free\n");
atomic_set(&g_atm_dev.dma_tx_free_0,1);
}
/* Brief: return the status of DMA TX descriptors
* Parameters: TX channel (DMA_TX_CH0, TX_CH1)
* Return:
* 1: there are availabel TX descriptors
* 0: no available
* Description:
*
*/
inline int dma_may_send(int ch)
{
if (atomic_read(&g_atm_dev.dma_tx_free_0)){
return 1;
}
return 0;
}
/******************************* global functions *********************************/
/*
* Brief: SWIE Cell Extraction Start Routine
* and task routine for swex_complete_task
* Parameters: irq_stat - interrupt status
*
* Description:
* This is the routine for extracting cell. It will schedule itself if the hardware is busy.
* This routine runs in interrupt context
*/
void amazon_atm_swex(void * irq_stat)
{
u32 ex_stat=0;
u32 addr;
// Read extraction status register
ex_stat = readl(CBM_HWEXSTAT0_ADDR);
// Check if extraction/insertion is in progress
if ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) || (test_and_set_bit(SWIE_LOCK, &(g_atm_dev.swie.lock))!=0)) {
AMAZON_TPE_DMSG(" extraction in progress. Will wait\n");
swex_start_task.data = irq_stat;
queue_task(&swex_start_task, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}else {
// Extract QID
g_atm_dev.swie.qid = (((u32)irq_stat) >> 24);
AMAZON_TPE_DMSG("extracting from qid=%u\n",g_atm_dev.swie.qid);
//read status word
addr = KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
addr = readl((addr + g_atm_dev.swie.qid * 0x10 + 4) & 0xFFFFFFC0);
addr = KSEG1ADDR(addr);
g_atm_dev.swie.sw = readl(addr+52)&SWIE_ADDITION_DATA_MASK;
AMAZON_TPE_DMSG("cell addition word: %8x \n", g_atm_dev.swie.sw);
// Start extraction
AMAZON_WRITE_REGISTER_L(g_atm_dev.swie.qid | SWIE_CBM_PID_SUBADDR, CBM_HWEXPAR0_ADDR);
AMAZON_WRITE_REGISTER_L(SWIE_CBM_SCE0, CBM_HWEXCMD_ADDR);
}
}
#ifdef AMAZON_TPE_SCR
u32 g_a5r_wait=0;
/*
* Brief: AAL5 Packet Extraction Routine and task routine for a5r_task
* Parameters: irq_stat - interrupt status
*
* Description:
* This is the routine for extracting frame. It will schedule itself if the hardware is busy.
* This routine runs in interrupt context
*/
void amazon_atm_a5r(void* qid)
{
volatile u32 ex_stat=0;
u32 addr;
u32 a5r_wait=0;
ex_stat = readl(CBM_HWEXSTAT0_ADDR);
#if 0
// Check if extraction/insertion is in progress
if ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) ) {
AMAZON_TPE_DMSG(" extraction in progress. Will wait\n");
a5r_task.data = qid;
queue_task(&a5r_task, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}else {
AMAZON_TPE_DMSG("extracting from qid=%u\n",(u8)qid);
// Start extraction
AMAZON_WRITE_REGISTER_L(((u8)qid) | CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
}
#else
//while ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) ) {
while ( ex_stat != 0x80){
a5r_wait++;
ex_stat = readl(CBM_HWEXSTAT0_ADDR);
#if 0
if (a5r_wait >= 0xffffff){
a5r_wait=0;
printk(".");
}
#endif
}
if (a5r_wait > g_a5r_wait){
g_a5r_wait = a5r_wait;
}
AMAZON_WRITE_REGISTER_L(((u8)qid) | CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
#endif
}
#endif //AMAZON_TPE_SCR
/* Brief: Handle F4/F5 OAM cell
* Return:
* 0 ok
* <0 fails
*/
static int inline amazon_handle_oam_cell(void *data, u8 vpi, u16 vci,u32 status)
{
struct atm_vcc* vcc=NULL;
int qid;
if (!status&SWIE_EOAM_MASK){
AMAZON_TPE_EMSG("unknown cell received, discarded\n");
goto amazon_handle_oam_cell_err_exit;
}else if (status&SWIE_ECRC10ERROR_MASK){
AMAZON_TPE_EMSG("CRC-10 Error Status:%8x, discarded\n", status);
goto amazon_handle_oam_cell_err_exit;
}else{
if(status & (SWIE_EVCI3_MASK |SWIE_EVCI4_MASK)){
//F4 level (VPI) OAM, Assume duplex
qid = amazon_atm_find_vpi(vpi)+CBM_RX_OFFSET;
}else if (status & (SWIE_EPTI4_MASK|SWIE_EPTI5_MASK)){
//F5 level (VCI) OAM, Assume duplex
qid = amazon_atm_find_vpivci(vpi,vci)+CBM_RX_OFFSET;
}else{
qid = -1;
AMAZON_TPE_EMSG("non-F4/F5 OAM cells?, discarded\n");
goto amazon_handle_oam_cell_err_exit;
}
}
if (valid_qid(qid) && ((vcc = g_atm_dev.queues[qid].vcc)!=NULL)){
//TODO, should we do this for ALL OAM types? (Actually only User and CC)
g_atm_dev.queues[qid].access_time=xtime;
if (vcc->push_oam){
(*vcc->push_oam)(vcc,data);
}else{
amz_push_oam(data);
}
}else{
AMAZON_TPE_EMSG("no VCC yet\n");
goto amazon_handle_oam_cell_err_exit;
}
return 0;
amazon_handle_oam_cell_err_exit:
dump_skb(AMAZON_AAL0_SDU,(char *)data);
return -1;
}
/* Brief: SWIE Cell Extraction Finish Routine
* and task routine for swex_complete_task
* Description:
* 1.Allocate a buffer of type struct sk_buff
* 2.Copy the data from the temporary memory to this buffer
* 3.Push the data to upper layer
* 4.Update the statistical data if necessary
* 5.Release the temporary data
*/
void amazon_atm_swex_push(void * data)
{
struct atm_vcc* vcc=NULL;
struct sk_buff* skb=NULL;
struct amazon_atm_cell_header * cell_header;
u32 status;
int qid;
if (!data){
AMAZON_TPE_EMSG("data is NULL\n");
return;
}
qid = ((u8*)data)[AMAZON_AAL0_SDU];
status = ((u32*)data)[ATM_AAL0_SDU/4];
cell_header = (struct amazon_atm_cell_header *) data;
if (valid_qid(qid) != 1){
AMAZON_TPE_EMSG("error qid: %u\n",qid);
AMAZON_TPE_EMSG("unknown cells recieved\n");
}else if (qid == AMAZON_ATM_OAM_Q_ID){
//OAM or RM or OTHER cell
//Find real connection
#ifdef IKOS_MINI_BOOT
//for OAM loop back test
dump_skb(56,(char *)data);
//kfree(data); using g_oam_cell
return;
#endif //IKOS_MINI_BOOT
#ifdef TPE_LOOPBACK
amz_push_oam(data);
return;
#endif//TPE_LOOPBACK
int ret = 0;
ret = amazon_handle_oam_cell(data,cell_header->bit.vpi,cell_header->bit.vci,status);
if (ret == 0)
return;
}else{
//should be normal AAL0 cells
// Get VCC
vcc = g_atm_dev.queues[qid].vcc;
if (vcc != NULL) {
AMAZON_TPE_DMSG("push to upper layer\n");
skb = dev_alloc_skb(AMAZON_AAL0_SDU);
if (skb != NULL) {
//skb->dev=vcc->dev;
memcpy(skb_put(skb, AMAZON_AAL0_SDU), data, AMAZON_AAL0_SDU);
skb->stamp = xtime;
ATM_SKB(skb)->vcc = vcc;
(*g_atm_dev.queues[qid].push)(vcc,skb,0);
}else{
AMAZON_TPE_EMSG(" No memory left for incoming AAL0 cell! Cell discarded!\n");
//inform the upper layer
(*g_atm_dev.queues[qid].push)(vcc,skb,-ENOMEM);
atomic_inc(&vcc->stats->rx_drop);
}
}else{
AMAZON_TPE_EMSG("invalid qid %u\n",qid);
}
}
//kfree(data); using g_oam_cell
}
/*
* Brief: Interrupt handler for software cell extraction (done)
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
*
* Description:
* When a software extraction is finished this interrupt is issued.
* It reads the cell data and sends it to the ATM stack.
*/
void amazon_atm_swex_isr(int irq, void *data, struct pt_regs *regs)
{
u32 * cell = NULL;
int i;
//ATM_AAL0 SDU + QID
AMAZON_TPE_DMSG("SWIE extraction done\n");
cell = (u32 *) g_oam_cell;
if (cell != NULL){
//convert to host byte order from big endian
for(i=0;i<ATM_AAL0_SDU;i+=4){
cell[i/4]=readl(SWIE_ECELL_ADDR+i);
}
cell[ATM_AAL0_SDU/4]= g_atm_dev.swie.sw;
((u8*)cell)[AMAZON_AAL0_SDU] = g_atm_dev.swie.qid;
#ifdef IKOS_MINI_BOOT
for(i=0;i<ATM_AAL0_SDU;i+=4){
AMAZON_TPE_DMSG("[%2x][%2x][%2x][%2x]\n",
((char*)cell)[i],
((char*)cell)[i+1],
((char*)cell)[i+2],
((char*)cell)[i+3]
);
}
AMAZON_TPE_DMSG("qid: %u\n", ((u8*)cell)[AMAZON_AAL0_SDU]);
amazon_atm_swex_push((void *) cell);
#else //not IKOS_MINI_BOOT
swex_complete_task.data = cell;
queue_task(&swex_complete_task,&tq_immediate);
mark_bh(IMMEDIATE_BH);
#endif //not IKOS_MINI_BOOT
}else{
AMAZON_TPE_EMSG("no memory for receiving AAL0 cell\n");
}
/* release the lock and check */
if (test_and_clear_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0){
AMAZON_TPE_EMSG("swie lock is already released\n");
}
wake_up(&g_atm_dev.swie.sleep);
}
/* Brief: Interrupt handler for software cell insertion
*
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
*
* Description:
* When a software insertion is finished this interrupt is issued.
* The only purpose is to release the semaphore and read the status register.
*/
void amazon_atm_swin_isr(int irq, void *data, struct pt_regs *regs)
{
AMAZON_TPE_DMSG("SWIE insertion done\n");
/* release the lock and check */
if (test_and_clear_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0){
AMAZON_TPE_EMSG("swie lock is already released");
}
// Release semaphore
up(&g_atm_dev.swie.in_sem);
}
/* Brief: Interrupt handler for software cell insertion & extraction
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
* Description:
* When a software insertion or extractionis finished this interrupt is issued.
*/
void amazon_atm_swie_isr(int irq, void *data, struct pt_regs *regs)
{
u32 status=0;
// Read status register
status = readl(SWIE_ISTAT_ADDR);
AMAZON_TPE_DMSG("insertion status: %8x\n", status);
if (status & SWIE_ISTAT_DONE){
//clear interrupt in peripheral and ICU
AMAZON_WRITE_REGISTER_L(SRC_TOS_MIPS | SRC_CLRR|SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ISRC_ADDR);
mask_and_ack_amazon_irq(AMAZON_SWIE_INT);
amazon_atm_swin_isr(irq,data,regs);
}
status = readl(SWIE_ESTAT_ADDR);
AMAZON_TPE_DMSG("extraction status: %8x\n", status);
if (status & SWIE_ESTAT_DONE){
//clear interrupt
AMAZON_WRITE_REGISTER_L(SRC_TOS_MIPS | SRC_CLRR|SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ESRC_ADDR);
mask_and_ack_amazon_irq(AMAZON_SWIE_INT);
amazon_atm_swex_isr(irq,data,regs);
}
//clear interrupt in ICU
}
/*
* Brief: Insert ATM cell into CBM
* Parameters: queue - Target queue
* cell - Pointer to cell data
* Return Value: EBUSY - CBM is busy
* 0 - OK, cell inserted
* Description:
* This function inserts a cell into the CBM using the software insertion
* method. The format of the cell should be
* Little Endian (address starting from 0)
* H3, H2, H1, H0, P3, P2, P1, P0, P7, P6, P5, P4, ..., P47, P46, P45, P44
* Big Endian (address starting from 0)
* H0, H1, H2, H3, P0, P1, P2, P3, P4, P5, P6, P7, ..., P44, P45, P46, P47
* This function does not free memory!!!
*/
int amazon_atm_swin(u8 queue, void* cell)
{
u32 status=0;
int i;
// Read status register
status = readl(SWIE_ISTAT_ADDR);
AMAZON_TPE_DMSG(" SWIE status=0x%08x\n",status);
AMAZON_TPE_DMSG(" Inserting cell qid=%u\n",queue);
#ifdef AMAZON_CHECK_LINK
if (adsl_link_status == 0){
return -EFAULT;
}
#endif //AMAZON_CHECK_LINK
// Get semaphore (if possible)
if (down_interruptible(&g_atm_dev.swie.in_sem)) {
return -ERESTARTSYS;
}
/* try to set lock */
wait_event_interruptible(g_atm_dev.swie.sleep,(test_and_set_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0));
if (signal_pending(current)){
return -ERESTARTSYS;
}
// Store cell in CBM memory
for(i=0;i<ATM_AAL0_SDU;i+=4){
AMAZON_WRITE_REGISTER_L(((u32*)cell)[i/4],SWIE_ICELL_ADDR+i);
}
//Store queue id
AMAZON_WRITE_REGISTER_L((u32) queue,SWIE_IQID_ADDR);
//Start SWIE
AMAZON_WRITE_REGISTER_L(SWIE_ICMD_START,SWIE_ICMD_ADDR);
return 0;
}
#ifdef AMAZON_ATM_DEBUG
/*
* Brief: Interrupt handler for HTU
*
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
*
*/
void amazon_atm_htu_isr(int irq, void *data, struct pt_regs *regs)
{
u32 irq_stat=0;
// Read interrupt status register
irq_stat = readl(HTU_ISR0_ADDR);
AMAZON_TPE_DMSG("HTU status: %8x\n",irq_stat);
//Clear interrupt in CBM and ICU
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_HTU_INT, HTU_SRC0_ADDR);
mask_and_ack_amazon_irq(AMAZON_HTU_INT);
// Check if Any Cell Arrived
if (irq_stat & (HTU_ISR_NE | HTU_ISR_PNE) ) {
AMAZON_TPE_EMSG("INFNOENTRY %8x\n", readl(HTU_INFNOENTRY_ADDR));
}else if (irq_stat & (HTU_ISR_TORD|HTU_ISR_PT)){
AMAZON_TPE_EMSG("Time Out %8x\n", readl(HTU_INFTIMEOUT_ADDR));
}else if (irq_stat & HTU_ISR_IT){
AMAZON_TPE_EMSG("Interrupt Test\n");
}else if (irq_stat & HTU_ISR_OTOC){
AMAZON_TPE_EMSG("Overflow of Time Out Counter\n");
}else if (irq_stat & HTU_ISR_ONEC){
AMAZON_TPE_EMSG("Overflow of No Entry Counter\n");
}else{
AMAZON_TPE_EMSG("unknown HTU interrupt occurs %8x\n", irq_stat);
}
}
#endif //AMAZON_ATM_DEBUG
#ifdef AMAZON_TPE_TEST_AAL5_INT
/*
* Brief: Interrupt handler for AAL5
*
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
*
*/
void amazon_atm_aal5_isr(int irq, void *data, struct pt_regs *regs)
{
volatile u32 irq_stat=0;
// Read interrupt status register
irq_stat = readl(AAL5_SISR0_ADDR);
if (irq_stat){
AMAZON_TPE_EMSG("A5S status: %8x\n",irq_stat);
//Clear interrupt in CBM and ICU
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT, AAL5_SSRC0_ADDR);
mask_and_ack_amazon_irq(AMAZON_AAL5_INT);
}
irq_stat = readl(AAL5_RISR0_ADDR);
if (irq_stat){
AMAZON_TPE_EMSG("A5R status: %8x\n",irq_stat);
//Clear interrupt in CBM and ICU
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT, AAL5_RSRC0_ADDR);
mask_and_ack_amazon_irq(AMAZON_AAL5_INT);
}
}
#endif //AMAZON_TPE_TEST_AAL5_INT
/*
* Brief: Interrupt handler for CBM
*
* Parameters: irq - CPPN for this interrupt
* data - Device ID for this interrupt
* regs - Register file
*
* Description:
* This is the MIPS interrupt handler for the CBM. It processes incoming cells
* for SWIE queues.
*/
void amazon_atm_cbm_isr(int irq, void *data, struct pt_regs *regs)
{
u32 irq_stat=0;
u8 qid=0;
// Read interrupt status register
while ( (irq_stat = readl(CBM_INTINF0_ADDR))){
AMAZON_TPE_DMSG("CBM INT status: %8x\n",irq_stat);
//Clear interrupt in CBM and ICU
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_CBM_INT, CBM_SRC0_ADDR);
qid = (u8) ((irq_stat & CBM_INTINF0_QID_MASK)>>CBM_INTINF0_QID_SHIFT);
#ifdef AMAZON_TPE_SCR
if (irq_stat & CBM_INTINF0_EF){
amazon_atm_a5r((void*)qid);
}
#endif
// Check if Any Cell Arrived
if (irq_stat & CBM_INTINF0_ACA) {
amazon_atm_swex((void *)irq_stat);
}
//TX AAL5 PDU discard
if (irq_stat & CBM_INTINF0_OPF){
if ( (qid) < CBM_RX_OFFSET ){
g_atm_dev.mib_counter.tx_drop++;
}
queue_statics(qid, QS_HW_DROP);
}
if (irq_stat & (CBM_INTINF0_ERR|CBM_INTINF0_Q0E|CBM_INTINF0_Q0I|CBM_INTINF0_RDE)){
AMAZON_TPE_EMSG("CBM INT status: %8x\n",irq_stat);
if (irq_stat & CBM_INTINF0_ERR){
AMAZON_TPE_EMSG("CBM Error: FPI Bus Error\n");
}
if (irq_stat & CBM_INTINF0_Q0E){
AMAZON_TPE_EMSG("CBM Error: Queue 0 Extract\n");
}
if (irq_stat & CBM_INTINF0_Q0I){
AMAZON_TPE_EMSG("CBM Error: Queue 0 Extract\n");
}
if (irq_stat & CBM_INTINF0_RDE){
AMAZON_TPE_EMSG("CBM Error: Read Empty Queue %u\n",qid);
dump_qd(qid);
}
}
}
mask_and_ack_amazon_irq(AMAZON_CBM_INT);
}
/* Brief: check the status word after AAL SDU after reassembly
*/
static inline void check_aal5_error(u8 stw0, u8 stw1, int qid)
{
if (stw0 & AAL5_STW0_MFL){
AMAZON_TPE_DMSG("Maximum Frame Length\n");
g_atm_dev.queues[qid].aal5VccOverSizedSDUs++;
}
if (stw0 & AAL5_STW0_CRC){
AMAZON_TPE_DMSG("CRC\n");
g_atm_dev.queues[qid].aal5VccCrcErrors++;
}
#ifdef AMAZON_ATM_DEBUG_RX
AMAZON_TPE_EMSG("qid:%u stw0:%8x stw1:%8x\n",qid,stw0,stw1);
#endif
}
/* Brief: Process DMA rx data
* Parameters:
dma_dev: pointer to the dma_device_info, provided by us when register the dma device
* Return: no
* Description: DMA interrupt handerl with OoS support. It is called when there is some data in rx direction.
*
*/
//507261:tc.chen void atm_process_dma_rx(struct dma_device_info* dma_dev)
void __system atm_process_dma_rx(struct dma_device_info* dma_dev)
{
u8 * head=NULL;
u32 length=0;
u8 stw0=0;
u8 stw1=0;
struct sk_buff * skb=NULL;
struct atm_vcc * vcc=NULL;
int qid=0;
#ifdef AMAZON_ATM_DEBUG_RX
static int dma_rx_dump=0;
static u32 seq=0;
seq++;
if (dma_rx_dump>0){
printk("\n=========================[%u]=========================\n",seq);
}
#endif
length=dma_device_read(dma_dev,&head,(void**)&skb);
AMAZON_TPE_DMSG("receive %8p[%u] from DMA\n", head,length);
if (head == NULL||length<=0) {
AMAZON_TPE_DMSG("dma_read null \n");
goto error_exit;
}
if (length > (g_atm_dev.aal5.rx_max_sdu+64)){
AMAZON_TPE_EMSG("received packet too large (%u)\n",length);
goto error_exit;
}
//check AAL5R trail for error and qid
//last byte is qid
length--;
qid = (int) head[length];
AMAZON_TPE_DMSG("head[%u] qid %u\n",length, qid);
//STW0 is always 4 bytes before qid
length -= 4;
stw0 = head[length]&0xff;
AMAZON_TPE_DMSG("head[%u] stw0 %8x\n",length, stw0);
//position of STW1 depends on the BE bits
length = length-4 + (stw0&AAL5_STW0_BE);
stw1 = head[length]&0xff;
AMAZON_TPE_DMSG("head[%u] stw1 %8x\n",length, stw1);
if ( (stw0 & AAL5_STW0_MASK) || (stw1 & AAL5_STW1_MASK) ){
//AAL5 Error
check_aal5_error(stw0, stw1,qid);
goto error_exit;
}
//make data pointers consistent
//UU + CPI
length -= 2;
AMAZON_TPE_DMSG("packet length %u\n", length);
//error: cannot restore the qid
if (valid_qid(qid) != 1){
AMAZON_TPE_EMSG("received frame in invalid qid %u!\n", qid);
goto error_exit;
}
vcc = g_atm_dev.queues[qid].vcc;
if (vcc == NULL){
AMAZON_TPE_EMSG("received frame in invalid vcc, qid=%u!\n",qid);
goto error_exit;
}
if (skb == NULL){
AMAZON_TPE_EMSG("cannot restore skb pointer!\n");
goto error_exit;
}
skb_put(skb,length);
skb->stamp = xtime;
g_atm_dev.queues[qid].access_time=xtime;
if ((*g_atm_dev.queues[qid].push)(vcc,skb,0)){
g_atm_dev.mib_counter.rx_drop++;
queue_statics(qid, QS_SW_DROP);
}else{
g_atm_dev.mib_counter.rx++;
adsl_led_flash();//joelin adsl led
queue_statics(qid, QS_PKT);
AMAZON_TPE_DMSG("push successful!\n");
}
#ifdef AMAZON_ATM_DEBUG_RX
if (dma_rx_dump>0){
printk("\nOK packet [dump=%u] length=%u\n",dma_rx_dump,length);
dump_skb(length+7, head);
}
if (dma_rx_dump >0) dma_rx_dump--;
#endif
return ;
error_exit:
#ifdef AMAZON_ATM_DEBUG_RX
if ( (head!=NULL) && (length >0)){
AMAZON_TPE_EMSG("length=%u\n",length);
dump_skb(length+5, head);
}
dma_rx_dump++;
#endif
g_atm_dev.mib_counter.rx_err++;
queue_statics(qid, QS_ERR);
/*
if (vcc){
(*g_atm_dev.queues[qid].push)(vcc,skb,1);
}
*/
if (skb != NULL) {
dev_kfree_skb_any(skb);
}
return;
}
/*Brief: ISR for DMA pseudo interrupt
*Parameter:
dma_dev: pointer to the dma_device_info, provided by us when register the dma device
intr_status:
RCV_INT: rx data available
TX_BUF_FULL_INT: tx descriptor run out of
TRANSMIT_CPT_INT: tx descriptor available again
*Return:
0 for success???
*/
//507261:tc.chen int amazon_atm_dma_handler(struct dma_device_info* dma_dev, int intr_status)
int __system amazon_atm_dma_handler(struct dma_device_info* dma_dev, int intr_status)
{
AMAZON_TPE_DMSG("status:%u\n",intr_status);
switch (intr_status) {
case RCV_INT:
atm_process_dma_rx(dma_dev);
break;
case TX_BUF_FULL_INT:
//TX full: no descriptors
atm_dma_full();
break;
case TRANSMIT_CPT_INT:
//TX free: at least one descriptor
atm_dma_free();
break;
default:
AMAZON_TPE_EMSG("unknown status!\n");
}
return 0;
}
/*Brief: free buffer for DMA tx
*Parameter:
dataptr: pointers to data buffer
opt: optional parameter, used to convey struct skb pointer, passwd in dma_device_write
*Return:
0 for success???
*Description:
called by DMA module to release data buffer after DMA tx transaction
*Error:
cannot restore skb pointer
*/
int amazon_atm_free_tx(u8*dataptr, void* opt)
{
struct sk_buff *skb;
if (opt){
AMAZON_TPE_DMSG("free skb%8p\n",opt);
skb = (struct sk_buff *)opt;
amazon_atm_free_tx_skb(skb);
}else{
AMAZON_TPE_EMSG("BUG: cannot restore skb pointer!\n");
}
return 0;
}
/*Brief: allocate buffer & do alignment
*/
inline struct sk_buff * amazon_atm_alloc_buffer(int len)
{
struct sk_buff *skb;
skb = dev_alloc_skb(len+16);
if (skb){
//alignment requriements (4x32 bits (16 bytes) boundary)
alloc_align_16(skb);
}
return skb;
}
/*Brief: allocate buffer for DMA rx
*Parameter:
len: length
opt: optional data to convey the skb pointer, which will be returned to me in interrupt handler,
*Return:
pointer to buffer, NULL means error?
*Description:
must make sure byte alignment
*/
u8* amazon_atm_alloc_rx(int len, int* offset, void **opt)
{
struct sk_buff *skb;
*offset = 0;
skb = amazon_atm_alloc_buffer(len);
if (skb){
AMAZON_TPE_DMSG("alloc skb->data:%8p len:%u\n",skb->data,len);
*(struct sk_buff**)opt = skb;
}else{
AMAZON_TPE_DMSG("no memory for receiving atm frame!\n");
return NULL;
}
return skb->data;
}
/* Brief: Allocate kernel memory for sending a datagram.
* Parameters
* vcc virtual connection
* size data buffer size
* Return:
* NULL fail
* sk_buff a pointer to a sk_buff
* Description:
* This function can allocate our own additional memory for AAL5S inbound
* header (8bytes). We have to replace the protocol default one (alloc_tx in /net/atm/common.c)
* when we open the device.
* byte alignment is done is DMA driver.
*/
struct sk_buff *amazon_atm_alloc_tx(struct atm_vcc *vcc,unsigned int size)
{
struct sk_buff *skb;
if (!dma_may_send(DMA_TX_CH0)){
AMAZON_TPE_EMSG("no DMA descriptor available!\n");
return NULL;
}
//AAL5 inbound header space + alignment extra buffer
size+=8+AAL5S_INBOUND_HEADER;
if (atomic_read(&vcc->tx_inuse) && !atm_may_send(vcc,size)) {
AMAZON_TPE_EMSG("Sorry tx_inuse = %u, size = %u, sndbuf = %u\n",
atomic_read(&vcc->tx_inuse),size,vcc->sk->sndbuf);
return NULL;
}
skb = amazon_atm_alloc_buffer(size);
if (skb == NULL){
AMAZON_TPE_EMSG("no memory\n");
return NULL;
}
AMAZON_TPE_DMSG("dev_alloc_skb(%u) = %x\n", skb->len, (u32)skb);
AMAZON_TPE_DMSG("tx_inuse %u += %u\n",atomic_read(&vcc->tx_inuse),skb->truesize);
atomic_add(skb->truesize+ATM_PDU_OVHD,&vcc->tx_inuse);
//reserve for AAL5 inbound header
skb_reserve(skb,AAL5S_INBOUND_HEADER);
return skb;
}
/* Brief: change per queue QSB setting according to vcc qos parameters
* Paramters:
* vcc: atm_vcc pointer
* qid: CBM queue id (1~15)
* Return:
*/
static inline void set_qsb(struct atm_vcc *vcc, struct atm_qos *qos, int qid)
{
qsb_qptl_t qptl;
qsb_qvpt_t qvpt;
u32 tmp=0;
unsigned int qsb_clk;
qsb_clk = amazon_get_fpi_hz()>>1;
AMAZON_TPE_EMSG("Class=%u MAX_PCR=%u PCR=%u MIN_PCR=%u SCR=%u MBS=%u CDV=%u\n"
,qos->txtp.traffic_class
,qos->txtp.max_pcr
,qos->txtp.pcr
,qos->txtp.min_pcr
,qos->txtp.scr
,qos->txtp.mbs
,qos->txtp.cdv
);
// PCR limiter
if (qos->txtp.max_pcr == 0){
qptl.bit.tprs = 0; /* 0 disables the PCR limiter */
}else {
// peak cell rate will be slightly lower than requested (maximum rate / pcr)= (qsbclock/2^3 * timestep/4)/pcr
tmp = (( (qsb_clk * g_atm_dev.qsb.tstepc)>>5)/ qos->txtp.max_pcr ) + 1;
// check if an overfow occured
if (tmp > QSB_TP_TS_MAX) {
AMAZON_TPE_EMSG("max_pcr is too small, max_pcr:%u tprs:%u\n",qos->txtp.max_pcr, tmp);
qptl.bit.tprs = QSB_TP_TS_MAX;
}else{
qptl.bit.tprs = tmp;
}
}
//WFQ
if (qos->txtp.traffic_class == ATM_CBR || qos->txtp.traffic_class ==ATM_VBR_RT){
// real time queue gets weighted fair queueing bypass
qptl.bit.twfq = 0;
}else if (qos->txtp.traffic_class ==ATM_VBR_NRT ||qos->txtp.traffic_class ==ATM_UBR_PLUS ){
// wfq calculation here are based on virtual cell rates, to reduce granularity for large rates
// wfq factor is maximum cell rate / garenteed cell rate.
//qptl.bit.twfq = g_atm_dev.qsb.min_cr * QSB_WFQ_NONUBR_MAX / qos->txtp.min_pcr;
if (qos->txtp.min_pcr == 0) {
AMAZON_TPE_EMSG("<warning> MIN_PCR should not be zero\n");
qptl.bit.twfq = QSB_WFQ_NONUBR_MAX;
}else{
tmp = QSB_GCR_MIN * QSB_WFQ_NONUBR_MAX / qos->txtp.min_pcr;
if (tmp == 0 ){
qptl.bit.twfq = 1;
}else if (tmp > QSB_WFQ_NONUBR_MAX){
AMAZON_TPE_EMSG("min_pcr is too small, min_pcr:%u twfq:%u\n",qos->txtp.min_pcr, tmp);
qptl.bit.twfq = QSB_WFQ_NONUBR_MAX;
}else{
qptl.bit.twfq = tmp;
}
}
}else if (qos->txtp.traffic_class == ATM_UBR){
// ubr bypass, twfq set to maximum value
qptl.bit.twfq = QSB_WFQ_UBR_BYPASS;
}else{
//tx is diabled, treated as UBR
AMAZON_TPE_EMSG("<warning> unsupported traffic class %u \n", qos->txtp.traffic_class);
qos->txtp.traffic_class = ATM_UBR;
qptl.bit.twfq = QSB_WFQ_UBR_BYPASS;
}
//SCR Leaky Bucket Shaper VBR.0/VBR.1
if (qos->txtp.traffic_class ==ATM_VBR_RT || qos->txtp.traffic_class ==ATM_VBR_NRT){
if (qos->txtp.scr == 0){
//SCR == 0 disable the shaper
qvpt.bit.ts = 0;
qvpt.bit.taus = 0;
}else{
//CLP
if (vcc->atm_options&ATM_ATMOPT_CLP){
//CLP1
qptl.bit.vbr = 1;
}else{
//CLP0
qptl.bit.vbr = 0;
}
//TS and TauS
tmp = (( (qsb_clk * g_atm_dev.qsb.tstepc)>>5)/ qos->txtp.scr ) + 1;
if (tmp > QSB_TP_TS_MAX) {
AMAZON_TPE_EMSG("scr is too small, scr:%u ts:%u\n",qos->txtp.scr, tmp);
qvpt.bit.ts = QSB_TP_TS_MAX;
}else{
qvpt.bit.ts = tmp;
}
tmp = (qos->txtp.mbs - 1)*(qvpt.bit.ts - qptl.bit.tprs)/64;
if (tmp > QSB_TAUS_MAX){
AMAZON_TPE_EMSG("mbs is too large, mbr:%u taus:%u\n",qos->txtp.mbs, tmp);
qvpt.bit.taus = QSB_TAUS_MAX;
}else if (tmp == 0){
qvpt.bit.taus = 1;
}else{
qvpt.bit.taus = tmp;
}
}
}else{
qvpt.w0 = 0;
}
//write the QSB Queue Parameter Table (QPT)
AMAZON_WRITE_REGISTER_L(QSB_QPT_SET_MASK,QSB_RTM_ADDR);
AMAZON_WRITE_REGISTER_L(qptl.w0, QSB_RTD_ADDR);
AMAZON_WRITE_REGISTER_L((QSB_TABLESEL_QPT<<QSB_TABLESEL_SHIFT)
| QSB_RAMAC_REG_LOW
| QSB_WRITE
| qid
,QSB_RAMAC_ADDR);
//write the QSB Queue VBR Parameter Table (QVPT)
AMAZON_WRITE_REGISTER_L(QSB_QVPT_SET_MASK,QSB_RTM_ADDR);
AMAZON_WRITE_REGISTER_L(qvpt.w0, QSB_RTD_ADDR);
AMAZON_WRITE_REGISTER_L((QSB_TABLESEL_QVPT<<QSB_TABLESEL_SHIFT)
| QSB_RAMAC_REG_LOW
| QSB_WRITE
| qid
,QSB_RAMAC_ADDR);
AMAZON_TPE_EMSG("tprs:%u twfq:%u ts:%u taus:%u\n",qptl.bit.tprs,qptl.bit.twfq,qvpt.bit.ts,qvpt.bit.taus);
}
/*
* Brief: create/change CBM queue descriptor
* Parameter:
* vcc: atm_vcc pointer
* qid: CBM queue id (1~15)
*/
static inline void set_qd(struct atm_vcc *vcc, u32 qid)
{
u32 tx_config=0,rx_config=0;
u32 itf = (u32) vcc->itf;
u32 dma_qos=0;
u8 * qd_addr=NULL;
tx_config|=CBM_QD_W3_WM_EN|CBM_QD_W3_CLPt;
//RT: check if the connection is a real time connection
if (vcc->qos.txtp.traffic_class == ATM_CBR || vcc->qos.txtp.traffic_class == ATM_VBR_RT){
tx_config|= CBM_QD_W3_RT;
}else{
tx_config|= CBM_QD_W3_AAL5; //don't set the AAL5 flag if it is a RT service
}
rx_config = tx_config;
if(vcc->qos.aal == ATM_AAL5){
//QoS: DMA QoS according to the traffic class
switch (vcc->qos.txtp.traffic_class){
case ATM_CBR: dma_qos = CBR_DMA_QOS;break;
case ATM_VBR_RT: dma_qos = VBR_RT_DMA_QOS;break;
case ATM_VBR_NRT: dma_qos = VBR_NRT_DMA_QOS;break;
case ATM_UBR_PLUS: dma_qos = UBR_PLUS_DMA_QOS;break;
case ATM_UBR: dma_qos = UBR_DMA_QOS;break;
}
//TX: upstream, AAL5(EPD or PPD), NOINT, SBid
tx_config |= CBM_QD_W3_DIR_UP|CBM_QD_W3_INT_NOINT|(itf&CBM_QD_W3_SBID_MASK);
//RX: DMA QoS, downstream, no interrupt, AAL5(EPD, PPD), NO INT, HCR
#ifdef AMAZON_TPE_SCR
rx_config |= dma_qos|CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_EOF;
#else
rx_config |= dma_qos|CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_NOINT|CBM_QD_W3_HCR;
#endif
}else {
//should be AAL0
//upstream, NOINT, SBid
tx_config |= CBM_QD_W3_DIR_UP|CBM_QD_W3_INT_NOINT|(itf&CBM_QD_W3_SBID_MASK);
//RX: downstream, ACA interrupt,
rx_config |= CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_ACA;
}
//Threshold: maximum threshold for tx/rx queue, which is adjustable in steps of 64 cells
tx_config |= ( (divide_by_64_round_up(tx_q_threshold)&0xffff)<<CBM_QD_W3_THRESHOLD_SHIFT) & CBM_QD_W3_THRESHOLD_MASK;
rx_config |= ( (divide_by_64_round_up(rx_q_threshold)&0xffff)<<CBM_QD_W3_THRESHOLD_SHIFT) & CBM_QD_W3_THRESHOLD_MASK;
qd_addr = (u8*) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
//TX
AMAZON_WRITE_REGISTER_L(tx_config, (qd_addr+qid*CBM_QD_SIZE + 0xc));
AMAZON_WRITE_REGISTER_L(0, (qd_addr+qid*CBM_QD_SIZE + 0x8));
//RX
AMAZON_WRITE_REGISTER_L(rx_config, (qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE + 0xc));
AMAZON_WRITE_REGISTER_L(0, (qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE + 0x8));
}
/*
* Brief: add HTU table entry
* Parameter:
* vpi.vci:
* qid: CBM queue id (DEST is qid + CBM_RX_OFFSET)
* idx: entry id (starting from zero to 14)
* Return:
* 0: sucessful
* EIO: HTU table entry cannot be written
*/
inline int set_htu_entry(u8 vpi, u16 vci, u8 qid, u8 idx)
{
int i = 0;
u32 tmp1=0;
while ((tmp1 = readl(HTU_RAMSTAT_ADDR))!=0 && i < 1024) i++;
if (i > 1024)
{
AMAZON_TPE_EMSG("timeout\n");
return -EIO;
}
// write address register,
AMAZON_WRITE_REGISTER_L(idx, HTU_RAMADDR_ADDR);
// configure transmit queue
tmp1 = vpi<<24|vci<<8;
tmp1|= HTU_RAMDAT1_VCON // valid connection the entry is not validated here !!!!!!!!!!!!!!!!
|HTU_RAMDAT1_VCI3 // vci3 -> oam queue
|HTU_RAMDAT1_VCI4 // vci4 -> oam queue
|HTU_RAMDAT1_VCI6 // vci6 -> rm queue
|HTU_RAMDAT1_PTI4 // pti4 -> oam queue
|HTU_RAMDAT1_PTI5; // pti5 -> oam queue
// ramdat 1 (in params & oam handling)
AMAZON_WRITE_REGISTER_L( tmp1, HTU_RAMDAT1_ADDR);
// ramdat 2 (out params & oam handling)
tmp1 = ((qid+CBM_RX_OFFSET)&HTU_RAMDAT2_QID_MASK)
|HTU_RAMDAT2_PTI6
|HTU_RAMDAT2_PTI7
|HTU_RAMDAT2_F4U
|HTU_RAMDAT2_F5U
;
AMAZON_WRITE_REGISTER_L( tmp1, HTU_RAMDAT2_ADDR);
wmb();
// write HTU entry
AMAZON_WRITE_REGISTER_L(HTU_RAMCMD_WR, HTU_RAMCMD_ADDR);
return 0;
}
/*
* Brief: add HTU table entry
* Parameter:
* vcc: atm_vcc pointer
* qid: CBM queue id
* Return:
* 0: sucessful
* EIO: HTU table entry cannot be written
*/
inline static int set_htu(struct atm_vcc *vcc, u32 qid)
{
return set_htu_entry(vcc->vpi, vcc->vci, qid, (qid - CBM_DEFAULT_Q_OFFSET));
}
/*
* Brief: allocate a queue
* Return:
* <=0 no available queues
* >0 qid
*/
static int atm_allocate_q(short itf)
{
int i;
u32 tmp1=0;
int qid=0;
amazon_atm_port_t * dev;
dev = &g_atm_dev.ports[itf];
//find start queue id for this interface
for (i=0; i< itf; i++)
{
qid+= g_atm_dev.ports[i].max_conn;
}
// apply default queue offset ( oam, free cell queue, others, rm )
qid += CBM_DEFAULT_Q_OFFSET;
tmp1 = qid;
// search for a free queue
while ( (qid<tmp1+dev->max_conn)
&& ( g_atm_dev.queues[qid].free != 1)) {
qid++;;
}
// if none was found, send failure message and return
if ( tmp1+dev->max_conn == qid)
{
return -EFAULT;
}
return qid;
}
/* Brief: open a aal5 or aal0 connection
*/
static int atm_open(struct atm_vcc *vcc, push_back_t push)
{
int err=0;
int qid=0;
amazon_atm_port_t * port = & g_atm_dev.ports[vcc->itf];
unsigned long flags;
/***************** check bandwidth ******************/
/* 511045:linmars change ATM_VBR_NRT to use scr instead of pcr */
if ((vcc->qos.txtp.traffic_class==ATM_CBR&&vcc->qos.txtp.max_pcr>port->tx_rem_cr)
||(vcc->qos.txtp.traffic_class==ATM_VBR_RT&&vcc->qos.txtp.max_pcr>port->tx_rem_cr)
||(vcc->qos.txtp.traffic_class==ATM_VBR_NRT&&vcc->qos.txtp.scr>port->tx_rem_cr)
||(vcc->qos.txtp.traffic_class==ATM_UBR_PLUS&&vcc->qos.txtp.min_pcr>port->tx_rem_cr)
) {
AMAZON_TPE_EMSG("not enough bandwidth left (%u) cells per seconds \n",port->tx_rem_cr);
return -EINVAL;
}
if ( (qid = amazon_atm_find_vpivci(vcc->vpi, vcc->vci)) >0 ){
AMAZON_TPE_EMSG("vpi:%u vci:%u is alreay open on queue:%u\n", vcc->vpi, vcc->vci, qid);
return -EADDRINUSE;
}
/***************** allocate entry queueID for this port *****************/
if ( (qid=atm_allocate_q(vcc->itf)) <= 0){
AMAZON_TPE_EMSG("port: %u max:%u qid: %u\n", vcc->itf, port->max_conn, qid);
AMAZON_TPE_EMSG("no availabel connections for this port:%u\n",vcc->itf);
return -EINVAL;
}
/**************QSB parameters and CBM descriptors*************/
set_qsb(vcc, &vcc->qos, qid);
set_qd(vcc, qid);
mb();
err=set_htu(vcc,qid);
if (err){
AMAZON_TPE_EMSG("set htu entry fails %u\n",err);
return err;
}
/************set internal mapping*************/
local_irq_save(flags);
g_atm_dev.queues[qid].free = 0;
g_atm_dev.queues[qid].vcc = vcc;
g_atm_dev.queues[qid].push = push;
g_atm_dev.queues[qid+CBM_RX_OFFSET].free = 0;
g_atm_dev.queues[qid+CBM_RX_OFFSET].vcc = vcc;
g_atm_dev.queues[qid+CBM_RX_OFFSET].push = push;
/******************reserve bandwidth**********************/
if (vcc->qos.txtp.traffic_class == ATM_CBR){
//CBR, real time connection, reserve PCR
port->tx_cur_cr += vcc->qos.txtp.max_pcr;
port->tx_rem_cr -= vcc->qos.txtp.max_pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_VBR_RT){
//VBR_RT, real time connection, reserve PCR
port->tx_cur_cr += vcc->qos.txtp.max_pcr;
port->tx_rem_cr -= vcc->qos.txtp.max_pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_VBR_NRT){
//VBR_NRT, reserve SCR
port->tx_cur_cr += vcc->qos.txtp.pcr;
port->tx_rem_cr -= vcc->qos.txtp.pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_UBR_PLUS){
//UBR_PLUS, reserve MCR
port->tx_cur_cr += vcc->qos.txtp.min_pcr;
port->tx_rem_cr -= vcc->qos.txtp.min_pcr;
}
local_irq_restore(flags);
return err;
}
/* Brief: Open ATM connection
* Parameters: atm_vcc - Pointer to VCC data structure
* vpi - VPI value for new connection
* vci - VCI value for new connection
*
* Return: 0 - sucessful
* -ENOMEM - No memory available
* -EINVAL - No bandwidth/queue/ or unsupported AAL type
* Description:
* This function opens an ATM connection on a specific device/interface
*
*/
int amazon_atm_open(struct atm_vcc *vcc,push_back_t push)
{
int err=0;
AMAZON_TPE_DMSG("vpi %u vci %u itf %u aal %u\n"
,vcc->vpi
,vcc->vci
,vcc->itf
,vcc->qos.aal
);
AMAZON_TPE_DMSG("tx cl %u bw %u mtu %u\n"
,vcc->qos.txtp.traffic_class
,vcc->qos.txtp.max_pcr
,vcc->qos.txtp.max_sdu
);
AMAZON_TPE_DMSG("rx cl %u bw %u mtu %u\n"
,vcc->qos.rxtp.traffic_class
,vcc->qos.rxtp.max_pcr
,vcc->qos.rxtp.max_sdu
);
if (vcc->qos.aal == ATM_AAL5 || vcc->qos.aal == ATM_AAL0){
err = atm_open(vcc,push);
}else{
AMAZON_TPE_EMSG("unsupported aal type %u\n", vcc->qos.aal);
err = -EPROTONOSUPPORT;
};
if (err == 0 ){
//replace the default memory allocation function with our own
vcc->alloc_tx = amazon_atm_alloc_tx;
set_bit(ATM_VF_READY,&vcc->flags);
}
return err;
}
/* Brief: Send ATM OAM cell
* Parameters: atm_vcc - Pointer to VCC data structure
* skb - Pointer to sk_buff structure, that contains the data
* Return: 0 - sucessful
* -ENOMEM - No memory available
* -EINVAL - Not supported
* Description:
* This function sends a cell over and ATM connection
* We always release the skb
* TODO: flags handling (ATM_OF_IMMED, ATM_OF_INRATE)
*/
int amazon_atm_send_oam(struct atm_vcc *vcc, void * cell, int flags)
{
int err=0;
int qid=0;
struct amazon_atm_cell_header * cell_header;
// Get cell header
cell_header = (struct amazon_atm_cell_header*) cell;
if ((cell_header->bit.pti == ATM_PTI_SEGF5) || (cell_header->bit.pti == ATM_PTI_E2EF5)) {
qid = amazon_atm_find_vpivci( cell_header->bit.vpi, cell_header->bit.vci);
}else if (cell_header->bit.vci == 0x3 || cell_header->bit.vci == 0x4) {
//507281:tc.chen qid = amazon_atm_find_vpi((int) cell_header->bit.vpi);
// 507281:tc.chen start
u8 f4_vpi;
f4_vpi = cell_header->bit.vpi;
qid = amazon_atm_find_vpi(f4_vpi );
// 507281:tc.chen end
}else{
//non-OAM cells, always invalid
qid = -EINVAL;
}
if (qid == -EINVAL) {
err = -EINVAL;
AMAZON_TPE_EMSG("not valid AAL0 packet\n");
}else{
//send the cell using swie
#ifdef TPE_LOOPBACK
err = amazon_atm_swin(AMAZON_ATM_OAM_Q_ID, cell);
#else
err = amazon_atm_swin(qid, cell);
#endif
}
//kfree(cell);
return err;
}
/* Brief: Send AAL5 frame through DMA
* Parameters: vpi - virtual path id
* vci - virtual circuit id
* clp - cell loss priority
* qid - CBM queue to be sent to
* skb - packet to be sent
* Return: 0 - sucessful
* -ENOMEM - No memory available
* -EINVAL - Not supported
* Description:
* This function sends a AAL5 frame over and ATM connection
* 1. make sure that the data is aligned to 4x32-bit boundary
* 2. provide the inbound data (CPCS-UU and CPI, not used here)
* 3. set CLPn
* 4. send the frame by DMA
* 5. release the buffer ???
** use our own allocation alloc_tx
** we make sure the alignment and additional memory
*** we always release the skb
*/
int amazon_atm_dma_tx(u8 vpi, u16 vci, u8 clp, u8 qid, struct sk_buff *skb)
{
int err=0,need_pop=1;
u32 * data=NULL;
int nwrite=0;
struct sk_buff *skb_tmp;
u32 len=skb->len;
//AAL5S inbound header 8 bytes
if (skb->len > g_atm_dev.aal5.tx_max_sdu - AAL5S_INBOUND_HEADER) {
AMAZON_TPE_DMSG("tx_max_sdu:%u\n",g_atm_dev.aal5.tx_max_sdu);
AMAZON_TPE_DMSG("skb too large [%u]!\n",skb->len);
err = -EMSGSIZE;
goto atm_dma_tx_error_exit;
}
//Check the byte alignment requirement and header space
if ( ( ((u32)(skb->data)%16) !=AAL5S_INBOUND_HEADER)|| (skb_headroom(skb)<AAL5S_INBOUND_HEADER)){
//not aligned or no space for header, fall back to memcpy
skb_tmp = dev_alloc_skb(skb->len+16);
if (skb_tmp==NULL){
err = - ENOMEM;
goto atm_dma_tx_error_exit;
}
alloc_align_16(skb_tmp);
g_atm_dev.aal5.cnt_cpy++;
skb_reserve(skb_tmp,AAL5S_INBOUND_HEADER);
memcpy(skb_put(skb_tmp,skb->len), skb->data, skb->len);
amazon_atm_free_tx_skb(skb);
need_pop=0;
skb = skb_tmp;
}
//Provide AAL5S inbound header
data = (u32 *)skb_push(skb,8);
data[0] = __be32_to_cpu(vpi<<20|vci<<4|clp);
data[1] = __be32_to_cpu(g_atm_dev.aal5.padding_byte<<8|qid);
len = skb->len;
//send through DMA
AMAZON_TPE_DMSG("AAL5S header 0 %8x\n", data[0]);
AMAZON_TPE_DMSG("AAL5S header 0 %8x\n", data[1]);
AMAZON_TPE_DMSG("about to call dma_write len: %u\n", len);
nwrite=dma_device_write( &g_dma_dev,skb->data,len,skb);
if (nwrite != len) {
//DMA descriptors full
// AMAZON_TPE_EMSG("AAL5 packet drop due to DMA nwrite:%u skb->len:%u\n", nwrite,len);
AMAZON_TPE_DMSG("AAL5 packet drop due to DMA nwrite:%u skb->len:%u\n", nwrite,len);
err = -EAGAIN;
goto atm_dma_tx_drop_exit;
}
AMAZON_TPE_DMSG("just finish call dma_write\n");
//release in the "dma done" call-back
return 0;
atm_dma_tx_error_exit:
g_atm_dev.mib_counter.tx_err++;
queue_statics(qid, QS_ERR);
goto atm_dma_tx_exit;
atm_dma_tx_drop_exit:
g_atm_dev.mib_counter.tx_drop++;
queue_statics(qid, QS_SW_DROP);
atm_dma_tx_exit:
if (need_pop){
amazon_atm_free_tx_skb(skb);
}else{
dev_kfree_skb_any(skb);
}
return err;
}
/* Brief: Send AAL0/AAL5 packet
* Parameters: atm_vcc - Pointer to VCC data structure
* skb - Pointer to sk_buff structure, that contains the data
* Return: 0 - sucessful
* -ENOMEM - No memory available
* -EINVAL - Not supported
* Description:
* See amazon_atm_dma_tx
*/
int amazon_atm_send(struct atm_vcc *vcc,struct sk_buff *skb)
{
int qid=0;
u8 clp=0;
int err=0;
u32 wm=0;
if (vcc == NULL || skb == NULL){
AMAZON_TPE_EMSG("invalid parameter\n");
return -EINVAL;
}
ATM_SKB(skb)->vcc = vcc;
qid = amazon_atm_get_queue(vcc);
if (valid_qid(qid) != 1) {
AMAZON_TPE_EMSG("invalid vcc!\n");
err = -EINVAL;
goto atm_send_err_exit;
}
//Send AAL0 using SWIN
if (vcc->qos.aal == ATM_AAL0){
#ifdef TPE_LOOPBACK
err=amazon_atm_swin((qid+CBM_RX_OFFSET), skb->data);
#else
err=amazon_atm_swin(qid, skb->data);
#endif
if (err){
goto atm_send_err_exit;
}
goto atm_send_exit;
}
//Should be AAl5
//MIB counter
g_atm_dev.mib_counter.tx++;
adsl_led_flash();//joelin adsl led
queue_statics(qid, QS_PKT);
#ifdef AMAZON_CHECK_LINK
//check adsl link
if (adsl_link_status == 0){
//link down
AMAZON_TPE_DMSG("ADSL link down, discarded!\n");
err=-EFAULT;
goto atm_send_drop_exit;
}
#endif
clp = (vcc->atm_options&ATM_ATMOPT_CLP)?1:0;
//check watermark first
wm = readl(CBM_WMSTAT0_ADDR);
if ( (wm & (1<<qid))
||( (vcc->qos.txtp.traffic_class != ATM_CBR
&&vcc->qos.txtp.traffic_class != ATM_VBR_RT)
&(wm & (CBM_WM_NRT_MASK | (clp&CBM_WM_CLP1_MASK)) ))){
//wm hit: discard
AMAZON_TPE_DMSG("watermark hit, discarded!\n");
err=-EFAULT;
goto atm_send_drop_exit;
}
#ifdef TPE_LOOPBACK
return amazon_atm_dma_tx(vcc->vpi, vcc->vci,clp, (qid+CBM_RX_OFFSET),skb);
#else
return amazon_atm_dma_tx(vcc->vpi, vcc->vci,clp, qid,skb);
#endif
atm_send_exit:
amazon_atm_free_tx_skb_vcc(vcc,skb);
return 0;
atm_send_drop_exit:
g_atm_dev.mib_counter.tx_drop++;
queue_statics(qid,QS_SW_DROP);
atm_send_err_exit:
amazon_atm_free_tx_skb_vcc(vcc,skb);
return err;
}
/* Brief: Return ATM port related MIB
* Parameter: interface number
atm_cell_ifEntry_t
*/
int amazon_atm_cell_mib(atm_cell_ifEntry_t* to,u32 itf)
{
g_atm_dev.mib_counter.htu_unp += readl(HTU_MIBCIUP);
to->ifInUnknownProtos = g_atm_dev.mib_counter.htu_unp;
#ifdef AMAZON_TPE_READ_ARC
u32 reg_val=0;
meiDebugRead((AR_CELL0_ADDR+itf*4),&reg_val,1);
g_atm_dev.mib_counter.rx_cells += reg_val;
reg_val=0;
meiDebugWrite((AR_CELL0_ADDR+itf*4),&reg_val,1);
to->ifHCInOctets_h = (g_atm_dev.mib_counter.rx_cells * 53)>>32;
to->ifHCInOctets_l = (g_atm_dev.mib_counter.rx_cells * 53) & 0xffff;
meiDebugRead((AT_CELL0_ADDR+itf*4),&reg_val,1);
g_atm_dev.mib_counter.tx_cells += reg_val;
reg_val=0;
meiDebugWrite((AT_CELL0_ADDR+itf*4),&reg_val,1);
to->ifHCOutOctets_h = (g_atm_dev.mib_counter.tx_cells * 53)>>32;
to->ifHCOutOctets_l = (g_atm_dev.mib_counter.rx_cells * 53) & 0xffff;
meiDebugRead((AR_CD_CNT0_ADDR+itf*4),&reg_val,1);
g_atm_dev.mib_counter.rx_err_cells += reg_val;
reg_val=0;
meiDebugWrite((AR_CD_CNT0_ADDR+itf*4),&reg_val,1);
to->ifInErrors = g_atm_dev.mib_counter.rx_err_cells;
to->ifOutErrors = 0;
#else
to->ifHCInOctets_h = 0;
to->ifHCInOctets_l = 0;
to->ifHCOutOctets_h = 0;
to->ifHCOutOctets_l = 0;
to->ifInErrors = 0;
to->ifOutErrors = 0;
#endif
return 0;
}
/* Brief: Return ATM AAL5 related MIB
* Parameter:
atm_aal5_ifEntry_t
*/
int amazon_atm_aal5_mib(atm_aal5_ifEntry_t* to)
{
u32 reg_l,reg_h;
//AAL5R received Octets from ATM
reg_l = readl(AAL5_RIOL_ADDR);
reg_h = readl(AAL5_RIOM_ADDR);
g_atm_dev.mib_counter.rx_cnt_h +=reg_h;
if (reg_l + g_atm_dev.mib_counter.rx_cnt_l < reg_l){
g_atm_dev.mib_counter.rx_cnt_h++;
}
g_atm_dev.mib_counter.rx_cnt_l+= reg_l;
//AAL5S sent Octets to ATM
reg_l = readl(AAL5_SOOL_ADDR);
reg_h = readl(AAL5_SOOM_ADDR);
g_atm_dev.mib_counter.tx_cnt_h +=reg_h;
if (reg_l + g_atm_dev.mib_counter.tx_cnt_l < reg_l){
g_atm_dev.mib_counter.tx_cnt_h++;
}
g_atm_dev.mib_counter.tx_cnt_l+= reg_l;
g_atm_dev.mib_counter.tx_ppd += readl(CBM_AAL5ODIS_ADDR);
g_atm_dev.mib_counter.rx_drop += readl(CBM_AAL5IDIS_ADDR);
//store
to->ifHCInOctets_h = g_atm_dev.mib_counter.rx_cnt_h;
to->ifHCInOctets_l = g_atm_dev.mib_counter.rx_cnt_l;
to->ifHCOutOctets_h = g_atm_dev.mib_counter.tx_cnt_h;
to->ifHCOutOctets_l = g_atm_dev.mib_counter.tx_cnt_l;
to->ifOutDiscards = g_atm_dev.mib_counter.tx_drop;
to->ifInDiscards = g_atm_dev.mib_counter.rx_drop;
//Software provided counters
//packets passed to higher layer
to->ifInUcastPkts = g_atm_dev.mib_counter.rx;
//packets passed from higher layer
to->ifOutUcastPkts = g_atm_dev.mib_counter.tx;
//number of wrong downstream packets
to->ifInErrors = g_atm_dev.mib_counter.rx_err;
//number of wrong upstream packets
to->ifOutErros = g_atm_dev.mib_counter.tx_err;
return 0;
}
/* Brief: Return ATM AAL5 VCC related MIB from internale use
* Parameter:
* qid
* atm_aal5_vcc_t
*/
static int __amazon_atm_vcc_mib(int qid, atm_aal5_vcc_t* to)
{
//aal5VccCrcErrors
to->aal5VccCrcErrors = g_atm_dev.queues[qid].aal5VccCrcErrors;
to->aal5VccOverSizedSDUs =g_atm_dev.queues[qid].aal5VccOverSizedSDUs;
to->aal5VccSarTimeOuts = 0; //not supported yet
return 0;
}
/* Brief: Return ATM AAL5 VCC related MIB from vpi/vci
* Parameter: atm_vcc
* atm_aal5_vcc_t
*/
int amazon_atm_vcc_mib_x(int vpi, int vci,atm_aal5_vcc_t* to)
{
int qid=0;
int err=0;
qid = amazon_atm_find_vpivci(vpi, vci);
if (qid >0 ){
err = __amazon_atm_vcc_mib(qid,to);
}else{
return -EINVAL;
}
return err;
}
/* Brief: Return ATM AAL5 VCC related MIB
* Parameter: atm_vcc
* atm_aal5_vcc_t
*/
int amazon_atm_vcc_mib(struct atm_vcc *vcc,atm_aal5_vcc_t* to)
{
int qid=0;
int err=0;
qid = amazon_atm_get_queue(vcc);
if (qid >0 ){
err = __amazon_atm_vcc_mib(qid,to);
}else{
return -EINVAL;
}
return err;
}
/* Brief: Close ATM connection
* Parameters: atm_vcc - Pointer to VCC data structure
* Return: no
* Description:
* This function closes the given ATM connection
*/
void amazon_atm_close(struct atm_vcc *vcc){
int i;
int qid=0;
u32 tmp1;
u8 * qd_addr;
unsigned long flags;
if (vcc == NULL){
AMAZON_TPE_EMSG("invalid parameter. vcc is null\n");
return;
}
u32 itf = (u32) vcc->itf;
//release bandwidth
if (vcc->qos.txtp.traffic_class == ATM_CBR){
g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.max_pcr;
g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.max_pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_VBR_RT){
g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.max_pcr;
g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.max_pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_VBR_NRT){
g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.pcr;
g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.pcr;
}else if (vcc->qos.txtp.traffic_class == ATM_UBR_PLUS){
g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.min_pcr;
g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.min_pcr;
}
qid = amazon_atm_get_queue(vcc);
if (qid == -EINVAL){
AMAZON_TPE_EMSG("unknown vcc %u.%u.%u\n", vcc->itf, vcc->vpi, vcc->vci);
return;
}
local_irq_save(flags);
//Disable HTU entry
i=0;
while ((tmp1 = readl(HTU_RAMSTAT_ADDR))!=0 && i < HTU_RAM_ACCESS_MAX) i++;
if (i == HTU_RAM_ACCESS_MAX){
AMAZON_TPE_EMSG("HTU RAM ACCESS out of time\n");
}
// write address register
AMAZON_WRITE_REGISTER_L(qid - CBM_DEFAULT_Q_OFFSET, HTU_RAMADDR_ADDR);
// invalidate the connection
AMAZON_WRITE_REGISTER_L(0, HTU_RAMDAT1_ADDR);
// write command
AMAZON_WRITE_REGISTER_L(HTU_RAMCMD_WR,HTU_RAMCMD_ADDR);
qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
#ifdef AMAZON_ATM_DEBUG
tmp1 = readl(qd_addr+qid*CBM_QD_SIZE+0x8) & 0xffff;
AMAZON_TPE_DMSG("TX queue has %u cells \n", tmp1);
tmp1 = readl( qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x08)&0xffff;
AMAZON_TPE_DMSG("RX queue has %u cells \n", tmp1);
#endif
// set threshold of txqueue to 0
tmp1 = readl(qd_addr+qid*CBM_QD_SIZE+0x0c);
tmp1&= (~ CBM_QD_W3_THRESHOLD_MASK);
AMAZON_WRITE_REGISTER_L(tmp1, (qd_addr+qid*CBM_QD_SIZE+0x0c));
// set threshold of rxqueue to 0
tmp1 = readl( qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x0c);
tmp1&= (~ CBM_QD_W3_THRESHOLD_MASK);
AMAZON_WRITE_REGISTER_L(tmp1,(qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x0c));
//clear internal mapping
amazon_atm_clear_vcc(qid);
amazon_atm_clear_vcc(qid+CBM_RX_OFFSET);
local_irq_restore(flags);
}
/* Brief: initialize internal data structure
*/
static void atm_constructor(amazon_atm_dev_t * dev)
{
int i;
memset(dev,0,sizeof(amazon_atm_dev_t));
atm_init_parameters(dev);
//internal: queue "free" flag
for(i=1;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
//dev->queues[i].vcc=NULL;
dev->queues[i].free = 1;
}
for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
dev->ports[i].tx_rem_cr = dev->ports[i].tx_max_cr;
}
//MIB
atomic_set(&dev->dma_tx_free_0,1); //initially there should be free descriptors
}
/* Brief: return round up base-2 logarithm
*/
static inline int get_log_2(u32 value)
{
int i=0,j=1;
while (i<11){
if (j>=value) break;
j=j<<1;
i++;
}
AMAZON_TPE_DMSG("round up base-2 logarithm of %u is %u\n", value, i);
return i;
}
/* Brief: TPE hardware initialization
* Parameter: specifiy the configurations of the hardware
*/
static inline int atm_init_hard(amazon_atm_dev_t * dev)
{
int i;
u32 tmp1, tmp2, tmp3;
u8 * mem_addr=NULL;
u8 * qd_addr=NULL;
//PMU power on the module 1st
*(AMAZON_PMU_PWDCR) = (*AMAZON_PMU_PWDCR) | (AMAZON_PMU_PWDCR_TPE);
//Reset the module
*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) | (AMAZON_RST_REQ_TPE);
mb();
mdelay(100);
*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) & (~(AMAZON_RST_REQ_TPE));
mb();
unsigned long qsb_clk = amazon_get_fpi_hz()>>1;
/*********allocate & arrange memory for CBM *********/
if (dev->cbm.mem_addr == NULL){
dev->cbm.allocated = 1;
mem_addr = (u8 *)__get_free_pages(GFP_KERNEL, get_log_2(((CBM_CELL_SIZE * dev->cbm.free_cell_cnt) >>PAGE_SHIFT) + 1));
if (mem_addr != NULL){
dev->cbm.mem_addr = mem_addr;
} else {
goto init_no_mem;
}
}
if (dev->cbm.qd_addr == NULL){
#ifdef CONFIG_USE_VENUS
//to work around a bug, bit15 of QDOFF address should be 1,Aug4, 2004
//thus, we allocate 64k memory
qd_addr = (u8 *)__get_free_pages(GFP_KERNEL, 4);
if (qd_addr != NULL) {
dev->cbm.qd_addr_free = (u8*) (((unsigned long) qd_addr));
dev->cbm.qd_addr = (u8*) (((unsigned long) qd_addr) | 0x8000);
}else{
goto init_no_mem;
}
#else //CONFIG_USE_VENUS
qd_addr = (u8 *)kmalloc( CBM_QD_SIZE * AMAZON_ATM_MAX_QUEUE_NUM, GFP_KERNEL);
if (qd_addr != NULL) {
dev->cbm.qd_addr = qd_addr;
}else {
goto init_no_mem;
}
#endif //CONFIG_USE_VENUS
}
//#ifndef CONFIG_MIPS_UNCACHED
mem_addr = (u8 *)KSEG1ADDR((unsigned long)dev->cbm.mem_addr);
qd_addr = (u8 *)KSEG1ADDR((unsigned long)dev->cbm.qd_addr);
//#endif
//CBM reset cell queue memory, 64 bytes / cell
memset_io(mem_addr, 0, CBM_CELL_SIZE * dev->cbm.free_cell_cnt);
//make a link list, last 4 bytes is pointer
for(i=1;i<dev->cbm.free_cell_cnt;i++){
AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr + CBM_CELL_SIZE * i)),(mem_addr + CBM_CELL_SIZE * (i-1) + 0x3c));
}
//reset queue descriptor
memset_io(qd_addr, 0, CBM_QD_SIZE * AMAZON_ATM_MAX_QUEUE_NUM);
//init word 0-2 of q0 (free cell list)
//address of last cell
AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr + CBM_CELL_SIZE * (dev->cbm.free_cell_cnt-1))), qd_addr);
//address of first cell
AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr)), (qd_addr + 4));
//no. of free cells
AMAZON_WRITE_REGISTER_L(dev->cbm.free_cell_cnt,(qd_addr + 8));
//init q descriptor for OAM receiving
AMAZON_WRITE_REGISTER_L((CBM_QD_W3_INT_ACA | (divide_by_64_round_up(oam_q_threshold)&0xff)<< CBM_QD_W3_THRESHOLD_SHIFT), (qd_addr + AMAZON_ATM_OAM_Q_ID * CBM_QD_SIZE + 0x0c));
// AMAZON_WRITE_REGISTER_L((CBM_QD_W3_INT_ACA | (u32)oam_q_threshold<< CBM_QD_W3_THRESHOLD_SHIFT), (qd_addr + AMAZON_ATM_OAM_Q_ID * CBM_QD_SIZE + 0x0c));
//config CBM
//set offset address and threshold
AMAZON_WRITE_REGISTER_L(CPHYSADDR(qd_addr), CBM_QDOFF_ADDR);
AMAZON_WRITE_REGISTER_L(((dev->cbm.nrt_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_NRTTHR_ADDR);
AMAZON_WRITE_REGISTER_L(((dev->cbm.clp0_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_CLP0THR_ADDR);
AMAZON_WRITE_REGISTER_L(((dev->cbm.clp1_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_CLP1THR_ADDR);
//config interrupts
AMAZON_WRITE_REGISTER_L( CBM_IMR_MASK & (~(CBM_IMR_ACA|CBM_IMR_Q0E|CBM_IMR_Q0I|CBM_IMR_RDE|CBM_IMR_OPF|CBM_IMR_ERR
#ifdef AMAZON_ATM_DEBUG
|CBM_IMR_DISC|CBM_IMR_QFD|CBM_IMR_NFCA|CBM_IMR_CLP1TR|CBM_IMR_CLP0TR|CBM_IMR_NRTTR|CBM_IMR_QTR
#endif
#ifdef AMAZON_TPE_SCR
|CBM_IMR_EF
#endif
)), CBM_IMR0_ADDR);
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_CBM_INT, CBM_SRC0_ADDR);
//HTU
//RAM entry for number of possible connections per interface
tmp1 = dev->ports[0].max_conn?dev->ports[0].max_conn-1:0;
AMAZON_WRITE_REGISTER_L(tmp1, HTU_RX0_ADDR);
for(i=1;i<AMAZON_ATM_PORT_NUM;i++){
tmp1+=dev->ports[i].max_conn;
AMAZON_WRITE_REGISTER_L(tmp1, HTU_RX0_ADDR + 4 * i);
}
dev->cbm.max_q_off = tmp1+1;
//Queue ID for OAM/RM/Other cells
AMAZON_WRITE_REGISTER_L (AMAZON_ATM_OAM_Q_ID, HTU_DESTOAM_ADDR);
AMAZON_WRITE_REGISTER_L( AMAZON_ATM_RM_Q_ID, HTU_DESTRM_ADDR);
AMAZON_WRITE_REGISTER_L( AMAZON_ATM_OTHER_Q_ID, HTU_DESTOTHER_ADDR);
//Timeout
AMAZON_WRITE_REGISTER_L((u32) HTUTIMEOUT, HTU_TIMEOUT_ADDR);
#ifdef AMAZON_ATM_DEBUG
AMAZON_WRITE_REGISTER_L((u32) HTU_ISR_MASK
&(~(HTU_ISR_NE|HTU_ISR_TORD|HTU_ISR_OTOC|HTU_ISR_ONEC|HTU_ISR_PNE|HTU_ISR_PT)), HTU_IMR0_ADDR);
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS|SRC_SRE_ENABLE|AMAZON_HTU_INT,HTU_SRC0_ADDR);
#endif
//QSB
//global setting, TstepC, SBL, Tau
//Tau
AMAZON_WRITE_REGISTER_L(dev->qsb.tau, QSB_TAU_ADDR);
//SBL
AMAZON_WRITE_REGISTER_L(dev->qsb.sbl, QSB_SBL_ADDR);
//tstep
AMAZON_WRITE_REGISTER_L(dev->qsb.tstepc>>1, QSB_CONFIG_ADDR);
//port settting
for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
if ( (dev->ports[i].enable) && (dev->ports[i].tx_max_cr!=0) ){
tmp1 = ((qsb_clk * dev->qsb.tstepc) >>1) / dev->ports[i].tx_max_cr;
tmp2 = tmp1 / 64; //integer value of Tsb
tmp3 = tmp1%64 + 1; //fractional part of Tsb
//carry over to integer part (?)
if (tmp3 == 64) {
tmp3 = 0;
tmp2++;
}
if (tmp2 == 0){
tmp2 = 1;
tmp3 = 1;
}
//1. set mask 2. write value to data transfer register 3. start the transfer
//SCT(FracRate)
AMAZON_WRITE_REGISTER_L(QSB_SET_SCT_MASK, QSB_RTM_ADDR);
AMAZON_WRITE_REGISTER_L(tmp3,QSB_RTD_ADDR);
AMAZON_WRITE_REGISTER_L(((QSB_TABLESEL_SCT<<QSB_TABLESEL_SHIFT)|QSB_RAMAC_REG_LOW|QSB_WRITE|i),QSB_RAMAC_ADDR);
//SPT(SBV + PN + IntRage)
AMAZON_WRITE_REGISTER_L(QSB_SET_SPT_MASK, QSB_RTM_ADDR);
AMAZON_WRITE_REGISTER_L(QSB_SPT_SBVALID|tmp2|(i<<16),QSB_RTD_ADDR);
AMAZON_WRITE_REGISTER_L(((QSB_TABLESEL_SPT<<QSB_TABLESEL_SHIFT)|QSB_RAMAC_REG_LOW|QSB_WRITE|i),QSB_RAMAC_ADDR);
}
}
//SWIE: Setup Service Request Control Registers to enable interrupts
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ISRC_ADDR);
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ESRC_ADDR);
wmb();
#ifdef AMAZON_TPE_TEST_AAL5_INT
AMAZON_WRITE_REGISTER_L(AAL5R_ISR_FE,AAL5_RIMR0_ADDR);
AMAZON_WRITE_REGISTER_L(0, AAL5_SIMR0_ADDR);
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT,AAL5_SSRC0_ADDR);
AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT,AAL5_RSRC0_ADDR);
#endif //AMAZON_TPE_TEST_AAL5_INT
AMAZON_WRITE_REGISTER_L(dev->aal5.tx_max_sdu,AAL5_SMFL_ADDR);
AMAZON_WRITE_REGISTER_L(dev->aal5.rx_max_sdu,AAL5_RMFL_ADDR);
AMAZON_WRITE_REGISTER_L(AAL5_SCMD_MODE_POLL // enable polling mode
|AAL5_SCMD_SS
|AAL5_SCMD_AR
,AAL5_SCMD_ADDR);
//start CBM
AMAZON_WRITE_REGISTER_L(CBM_CFG_START,CBM_CFG_ADDR);
wmb();
return 0;
init_no_mem:
if (mem_addr != NULL) free_pages((unsigned long)mem_addr,get_log_2(((CBM_CELL_SIZE * dev->cbm.free_cell_cnt) >>PAGE_SHIFT) + 1));
#ifdef CONFIG_USE_VENUS
//to work around a bug, bit15 of QDOFF address should be 1
if (qd_addr != NULL) free_pages((unsigned long)qd_addr,4);
#else //CONFIG_USE_VENUS
if (qd_addr != NULL) kfree(qd_addr);
#endif //CONFIG_USE_VENUS
return -ENOMEM;
}
/*
* Brief: Create entry in /proc for status information
*/
void atm_create_proc(void)
{
create_proc_read_entry("amazon_atm", 0,NULL, amazon_atm_read_procmem,(void*)PROC_ATM);
create_proc_read_entry("amazon_atm_mib", 0,NULL, amazon_atm_read_procmem,(void*)PROC_MIB);
create_proc_read_entry("amazon_atm_vcc", 0,NULL, amazon_atm_read_procmem,(void*)PROC_VCC);
#if 0
create_proc_read_entry("amazon_atm_aal5", 0,NULL, amazon_atm_read_procmem,(void*)PROC_AAL5);
create_proc_read_entry("amazon_atm_cbm", 0,NULL, amazon_atm_read_procmem,(void*)PROC_CBM);
create_proc_read_entry("amazon_atm_htu", 0,NULL, amazon_atm_read_procmem,(void*)PROC_HTU);
create_proc_read_entry("amazon_atm_qsb", 0,NULL, amazon_atm_read_procmem,(void*)PROC_QSB);
create_proc_read_entry("amazon_atm_swie", 0,NULL, amazon_atm_read_procmem,(void*)PROC_SWIE);
#endif
}
/*
* Brief: Delete entry in /proc for status information
*/
void atm_delete_proc(void)
{
remove_proc_entry("amazon_atm", NULL);
remove_proc_entry("amazon_atm_mib", NULL);
remove_proc_entry("amazon_atm_vcc", NULL);
#if 0
remove_proc_entry("amazon_atm_aal5", NULL);
remove_proc_entry("amazon_atm_cbm", NULL);
remove_proc_entry("amazon_atm_htu", NULL);
remove_proc_entry("amazon_atm_qsb", NULL);
remove_proc_entry("amazon_atm_swie", NULL);
#endif
}
/* Brief: Initialize ATM module
* Parameters: no
* Return: &g_atm_dev - sucessful
* NULL - fails:
* 1. invalid parameter
* 2. No memory available
* Description:
* This function configure the TPE components according to the input info,
* -CBM
* -HTU
* -QSB
* -AAL5
*
*/
amazon_atm_dev_t * amazon_atm_create(void)
{
int i;
AMAZON_TPE_DMSG("atm_init\n");
/************initialize global data structure****************/
atm_constructor(&g_atm_dev);
/***********allocate kernel resources****************/
//bottom halfs for SWEX
swex_start_task.routine = amazon_atm_swex;
swex_start_task.data = NULL;
swex_complete_task.routine = amazon_atm_swex_push;
swex_complete_task.data = NULL;
#ifdef AMAZON_TPE_SCR
a5r_task.routine = amazon_atm_a5r;
a5r_task.data = NULL;
#endif //AMAZON_TPE_SCR
//SWIN semaphore
sema_init(&(g_atm_dev.swie.in_sem), 1);
//SWIE lock
clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
//SWIE wait queue
init_waitqueue_head(&(g_atm_dev.swie.sleep));
atm_create_proc();
//register DMA
memset(&g_dma_dev,0,sizeof(struct dma_device_info));
strcpy(g_dma_dev.device_name,"TPE");
g_dma_dev.weight=1;
g_dma_dev.num_tx_chan=2;
g_dma_dev.num_rx_chan=2;
g_dma_dev.ack=1;
g_dma_dev.tx_burst_len=4;
g_dma_dev.rx_burst_len=4;
//DMA TX
for(i=0;i<1;i++){
g_dma_dev.tx_chan[i].weight=QOS_DEFAULT_WGT;
g_dma_dev.tx_chan[i].desc_num=10;
g_dma_dev.tx_chan[i].packet_size=g_atm_dev.aal5.tx_max_sdu + AAL5S_INBOUND_HEADER;
g_dma_dev.tx_chan[i].control=1;
}
//DMA RX
for(i=0;i<2;i++){
g_dma_dev.rx_chan[i].weight=QOS_DEFAULT_WGT;
/* BingTao's suggestion, change from 5->10 will prevent packet loss in NO_TX_INT mode */
g_dma_dev.rx_chan[i].desc_num=10;
g_dma_dev.rx_chan[i].packet_size=(g_atm_dev.aal5.rx_max_sdu + AAL5R_TRAILER_LEN+0x10f)&(~0xf);
g_dma_dev.rx_chan[i].control=1;
}
g_dma_dev.intr_handler=amazon_atm_dma_handler;
g_dma_dev.buffer_alloc=amazon_atm_alloc_rx;
g_dma_dev.buffer_free=amazon_atm_free_tx;
dma_device_register(&g_dma_dev);
/***********intialize the atm hardware ****************/
if ( atm_init_hard(&g_atm_dev) != 0){
return NULL;
}
//start CBM
AMAZON_WRITE_REGISTER_L(CBM_CFG_START,CBM_CFG_ADDR);
wmb();
//Start HTU
AMAZON_WRITE_REGISTER_L(HTU_CFG_START ,HTU_CFG_ADDR);
wmb();
// Register interrupts for insertion and extraction
request_irq(AMAZON_SWIE_INT, amazon_atm_swie_isr, IRQF_DISABLED, "tpe_swie", NULL);
request_irq(AMAZON_CBM_INT, amazon_atm_cbm_isr, IRQF_DISABLED, "tpe_cbm", NULL);
#ifdef AMAZON_ATM_DEBUG
request_irq(AMAZON_HTU_INT , amazon_atm_htu_isr, IRQF_DISABLED, "tpe_htu", NULL);
#endif
#ifdef AMAZON_TPE_TEST_AAL5_INT
request_irq(AMAZON_AAL5_INT, amazon_atm_aal5_isr, IRQF_DISABLED, "tpe_aal5", NULL);
#endif
return &g_atm_dev;
}
/* Brief: clean up atm
* Parameters: no
* Return: no
* Description:
* Disable the device.
*/
void amazon_atm_cleanup(void){
int i;
clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
wake_up(&g_atm_dev.swie.sleep);
up(&g_atm_dev.swie.in_sem);
// diable SWIE interrupts
AMAZON_WRITE_REGISTER_L(0, SWIE_ISRC_ADDR);
AMAZON_WRITE_REGISTER_L(0, SWIE_ESRC_ADDR);
wmb();
// Disable schedulers ( including interrupts )-----------------------
for (i = 0; i < AMAZON_ATM_PORT_NUM; i++);
{
AMAZON_WRITE_REGISTER_L(QSB_SET_SPT_SBVALID_MASK, QSB_RTM_ADDR);
AMAZON_WRITE_REGISTER_L( 0 ,QSB_RTD_ADDR);
AMAZON_WRITE_REGISTER_L( (QSB_TABLESEL_SPT<<QSB_TABLESEL_SHIFT)
| QSB_RAMAC_REG_LOW
| QSB_WRITE
| i,
QSB_RAMAC_ADDR);
}
// disable QSB_Interrupts
AMAZON_WRITE_REGISTER_L( 0, QSB_IMR_ADDR);
AMAZON_WRITE_REGISTER_L( 0, QSB_SRC_ADDR);
// disable CBM interrupts
AMAZON_WRITE_REGISTER_L( 0 , CBM_IMR0_ADDR);
AMAZON_WRITE_REGISTER_L( 0 , CBM_SRC0_ADDR);
// set CBM start bit to 0
AMAZON_WRITE_REGISTER_L(0,CBM_CFG_ADDR);
// request hardware extraction of queue 0, wich should force the CBM
// to recognize that the start bit is not set
AMAZON_WRITE_REGISTER_L(CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
// write frame extraction command into the hw extract command register
AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
// disable htu
// disable all HTU interrupts
AMAZON_WRITE_REGISTER_L(0 ,HTU_IMR0_ADDR);
AMAZON_WRITE_REGISTER_L(0 ,HTU_SRC0_ADDR);
if (g_atm_dev.cbm.allocated){
free_pages((unsigned long)g_atm_dev.cbm.mem_addr, get_log_2(((CBM_CELL_SIZE * g_atm_dev.cbm.free_cell_cnt) >>PAGE_SHIFT)+1));
#ifdef CONFIG_USE_VENUS
//to work around a bug, bit15 of QDOFF address should be 1
free_pages((unsigned long)g_atm_dev.cbm.qd_addr_free,4);
#else //CONFIG_USE_VENUS
kfree(g_atm_dev.cbm.qd_addr);
#endif //CONFIG_USE_VENUS
}
atm_delete_proc();
// free interrupts for insertion and extraction
dma_device_unregister(&g_dma_dev);
free_irq(AMAZON_SWIE_INT, NULL);
free_irq(AMAZON_CBM_INT, NULL);
#ifdef AMAZON_ATM_DEBUG
free_irq(AMAZON_HTU_INT, NULL);
#endif
#ifdef AMAZON_TPE_TEST_AAL5_INT
free_irq(AMAZON_AAL5_INT, NULL);
#endif
}
/************************ ATM network interface ***********************************************/
/* Brief: getsockopt
*/
int amazon_atm_getsockopt(struct atm_vcc *vcc, int level, int optname, char *optval, int optlen)
{
int err=0;
atm_aal5_vcc_t mib_vcc;
AMAZON_TPE_DMSG("1\n");
switch (optname){
case SO_AMAZON_ATM_MIB_VCC:
AMAZON_TPE_DMSG("2\n");
err = amazon_atm_vcc_mib(vcc, &mib_vcc);
AMAZON_TPE_DMSG("%u\n",mib_vcc.aal5VccCrcErrors);
err = copy_to_user((void *)optval,&mib_vcc, sizeof(mib_vcc));
AMAZON_TPE_DMSG("err %u\n",err);
break;
default:
return -EFAULT;
}
return err;
}
/* Brief: IOCTL
*/
int amazon_atm_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
{
int err=0;
//MIB
atm_cell_ifEntry_t mib_cell;
atm_aal5_ifEntry_t mib_aal5;
atm_aal5_vcc_x_t mib_vcc;
if (_IOC_TYPE(cmd) != AMAZON_ATM_IOC_MAGIC) return -ENOTTY;
if (_IOC_NR(cmd) > AMAZON_ATM_IOC_MAXNR) return -ENOTTY;
if (_IOC_DIR(cmd) & _IOC_READ)
err = !access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) & _IOC_WRITE)
err = !access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
if (err) {
AMAZON_TPE_EMSG("acess verification fails \n");
return -EFAULT;
}
switch(cmd) {
case AMAZON_ATM_MIB_CELL:
err = amazon_atm_cell_mib(&mib_cell,(u32)arg);
if (err==0){
err = __copy_to_user((void *)arg,&mib_cell,sizeof(mib_cell));
}else{
AMAZON_TPE_EMSG("cannot get MIB ATM_CELL\n");
}
break;
case AMAZON_ATM_MIB_AAL5:
err = amazon_atm_aal5_mib(&mib_aal5);
if (err==0){
err=__copy_to_user(arg, &mib_aal5, sizeof(mib_aal5));
}else{
AMAZON_TPE_EMSG("cannot get MIB ATM_AAL5\n");
}
break;
case AMAZON_ATM_MIB_VCC:
err=__copy_from_user(&mib_vcc,arg, sizeof(mib_vcc));
AMAZON_TPE_DMSG("return of copy_from_user %x\n",err);
err = amazon_atm_vcc_mib_x(mib_vcc.vpi, mib_vcc.vci, &(mib_vcc.mib_vcc));
if (err==0){
err=__copy_to_user(arg, &mib_vcc, sizeof(mib_vcc));
}else{
AMAZON_TPE_EMSG("cannot get MIB ATM_VCC\n");
}
default:
return -ENOTTY;
}
return err;
}
/* Brief: return a link list of OAM related time stamp info
* Parameter: none
* Return:
a link list of "struct oam_last_activity" data
* Description:
Each time, a F4/F5 cell or AAL5 packet is received, the time stamp is updated.
Through this call, u get a list of this time stamp for all active connection.
Please note that u have read-only access.
*/
const struct oam_last_activity* get_oam_time_stamp()
{
int i,j;
for(i=CBM_DEFAULT_Q_OFFSET+CBM_RX_OFFSET,j=0;i<CBM_RX_OFFSET+CBM_DEFAULT_Q_OFFSET+AMAZON_ATM_MAX_VCC_NUM;i++){
if (g_atm_dev.queues[i].free != 1 && g_atm_dev.queues[i].vcc != NULL){
//active connection
if (j !=0 ){
g_oam_time_stamp[j-1].next = &g_oam_time_stamp[j];
}
g_oam_time_stamp[j].vpi = g_atm_dev.queues[i].vcc->vpi;
g_oam_time_stamp[j].vci = g_atm_dev.queues[i].vcc->vci;
g_oam_time_stamp[j].stamp = g_atm_dev.queues[i].access_time;
g_oam_time_stamp[j].next = NULL;
j++;
}
}
if (j==0) {
return NULL;
}else{
return g_oam_time_stamp;
}
}
/* Brief: call back routine for rx
* Parameter:
* vcc atm_vcc pointer
* skb data if no error
err error flag, 0: no error, 1:error
* Return:
* 0
* <>0 cannot push up
* Description:
* release the packet if cannot push up
*/
static int amazon_atm_net_push(struct atm_vcc *vcc,struct sk_buff *skb, int err)
{
if (err){
if (vcc && vcc->stats) {
atomic_inc(&vcc->stats->rx_err);
}
}else{
ATM_SKB(skb)->vcc = vcc;
if (!atm_charge(vcc, skb->truesize)){
//no space this vcc
AMAZON_TPE_EMSG("no space for this vcc\n");
dev_kfree_skb_any(skb);
return -ENOMEM;
}
atomic_inc(&vcc->stats->rx);
AMAZON_TPE_DMSG("push to vcc\n");
vcc->push(vcc,skb);
}
return 0;
}
int amazon_atm_net_send_oam(struct atm_vcc*vcc, void *cell, int flags)
{
return amazon_atm_send_oam(vcc,cell,flags);
}
int amazon_atm_net_send(struct atm_vcc *vcc,struct sk_buff *skb)
{
int err=0;
if (vcc->qos.aal == ATM_AAL0 || vcc->qos.aal == ATM_AAL5) {
err=amazon_atm_send(vcc,skb);
}else{
//not supported
err = -EPROTONOSUPPORT;
}
if (err){
atomic_inc(&vcc->stats->tx_err);
}else{
atomic_inc(&vcc->stats->tx);
}
AMAZON_TPE_DMSG("sent, tx_inuse:%u\n", atomic_read(&vcc->tx_inuse));
return err;
}
int amazon_atm_net_open(struct atm_vcc *vcc,short vpi, int vci)
{
vcc->itf = (int) vcc->dev->dev_data;
vcc->vpi = vpi;
vcc->vci = vci;
return(amazon_atm_open(vcc,amazon_atm_net_push));
}
static int amazon_atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flgs)
{
int qid;
if (vcc == NULL || qos == NULL){
AMAZON_TPE_EMSG("invalid parameters\n");
return -EINVAL;
}
qid = amazon_atm_get_queue(vcc);
if (valid_qid(qid) != 1) {
AMAZON_TPE_EMSG("no vcc connection opened\n");
return -EINVAL;
}
set_qsb(vcc,qos,qid);
return 0;
}
static struct atmdev_ops amazon_atm_ops = {
open: amazon_atm_net_open,
close: amazon_atm_close,
ioctl: amazon_atm_ioctl,
send: amazon_atm_net_send,
send_oam: amazon_atm_net_send_oam,
// getsockopt: amazon_atm_getsockopt,
change_qos: amazon_atm_change_qos,
// proc_read: amazon_atm_proc_read,
owner: THIS_MODULE,
}; // ATM device callback functions
/*
* brief "/proc" function
*/
int amazon_atm_read_procmem(char *buf, char **start, off_t offset,int count, int *eof, void *data)
{
int buf_off=0; /* for buf */
int i=0,j=0;
int type= (u32)data;//which module
atm_aal5_ifEntry_t mib_aal5;
atm_cell_ifEntry_t mib_cell;
atm_aal5_vcc_t mib_vcc;
switch(type){
case PROC_MIB:
//MIB counter
amazon_atm_aal5_mib(&mib_aal5);
//TX:
buf_off+=sprintf(buf+buf_off,"\n============= AAL5 Upstream =========\n");
buf_off+=sprintf(buf+buf_off,"received %u (pkts) from upper layer\n", mib_aal5.ifOutUcastPkts);
buf_off+=sprintf(buf+buf_off,"errors: %u (pkts)\n",mib_aal5.ifOutErros);
buf_off+=sprintf(buf+buf_off,"discards: %u (ptks)\n", mib_aal5.ifOutDiscards);
buf_off+=sprintf(buf+buf_off,"transmitted: %x-%x (bytes) \n",
mib_aal5.ifHCOutOctets_h, mib_aal5.ifHCOutOctets_l);
//RX:
buf_off+=sprintf(buf+buf_off,"\n============= AAL5 Downstream =========\n");
buf_off+=sprintf(buf+buf_off,"received %x-%x (bytes)\n",
mib_aal5.ifHCInOctets_h,mib_aal5.ifHCInOctets_l);
buf_off+=sprintf(buf+buf_off,"discards: %u (ptks)\n",mib_aal5.ifInDiscards);
buf_off+=sprintf(buf+buf_off,"errors: %u (ptks)\n",mib_aal5.ifInErrors);
buf_off+=sprintf(buf+buf_off,"passed %u (ptks) to upper layer\n",mib_aal5.ifInUcastPkts);
//Cell level
buf_off+=sprintf(buf+buf_off,"\n============= ATM Cell =========\n");
amazon_atm_cell_mib(&mib_cell,0);
#ifdef AMAZON_TPE_READ_ARC
buf_off+=sprintf(buf+buf_off,"Port 0: downstream received: %x-%x (bytes)\n",mib_cell.ifHCInOctets_h,mib_cell.ifHCInOctets_l);
buf_off+=sprintf(buf+buf_off,"Port 0: upstream transmitted: %x-%x (bytes)\n",mib_cell.ifHCOutOctets_h,mib_cell.ifHCOutOctets_l);
buf_off+=sprintf(buf+buf_off,"Port 0: downstream errors: %u (cells)\n",mib_cell.ifInErrors);
amazon_atm_cell_mib(&mib_cell,1);
buf_off+=sprintf(buf+buf_off,"Port 1: downstream received: %x-%x (bytes)\n",mib_cell.ifHCInOctets_h,mib_cell.ifHCInOctets_l);
buf_off+=sprintf(buf+buf_off,"Port 1: upstream transmitted: %x-%x (bytes)\n",mib_cell.ifHCOutOctets_h,mib_cell.ifHCOutOctets_l);
buf_off+=sprintf(buf+buf_off,"Port 1: downstream errors: %u (cells)\n",mib_cell.ifInErrors);
#endif
buf_off+=sprintf(buf+buf_off,"HTU discards: %u (cells)\n",mib_cell.ifInUnknownProtos);
buf_off+=sprintf(buf+buf_off,"\n====== Specials =====\n");
buf_off+=sprintf(buf+buf_off,"AAL5S PPD: %u (cells)\n",g_atm_dev.mib_counter.tx_ppd);
#ifdef AMAZON_TPE_SCR
buf_off+=sprintf(buf+buf_off,"Reassembly wait: %u \n",g_a5r_wait);
#endif
break;
case PROC_ATM:
//Interface (Port)
buf_off+=sprintf(buf+buf_off,"[Interfaces]\n");
for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
if (g_atm_dev.ports[i].enable==0){
buf_off+=sprintf(buf+buf_off,"\tport[%u] not in use\n",i);
}else{
buf_off+=sprintf(buf+buf_off,"\tport[%u]\n\t\tmax_conn=%u\n"
,i
,g_atm_dev.ports[i].max_conn
);
buf_off+=sprintf(buf+buf_off,"\t\ttx_max=%u\n\t\trem=%u\n\t\tcur=%u\n"
,g_atm_dev.ports[i].tx_max_cr
,g_atm_dev.ports[i].tx_rem_cr
,g_atm_dev.ports[i].tx_cur_cr
);
}
}
//Units Info
//AAL5
buf_off+=sprintf(buf+buf_off,"[AAL5]\n\tpad=%c(%x)\n\trx_mtu=%u\n\ttx_mtu=%u\n"
,g_atm_dev.aal5.padding_byte
,g_atm_dev.aal5.padding_byte
,g_atm_dev.aal5.rx_max_sdu
,g_atm_dev.aal5.tx_max_sdu
);
//CBM
buf_off+=sprintf(buf+buf_off,
"[CBM]\n\tnrt_thr=%u\n\tclp0_thr=%u\n\tclp1_thr=%u\n\ttx_q_threshold=%u\n\trx_q_threshold=%u\n\toam_q_threshold=%u\n\tfree_cell_cnt=%u\n"
,g_atm_dev.cbm.nrt_thr
,g_atm_dev.cbm.clp0_thr
,g_atm_dev.cbm.clp1_thr
,tx_q_threshold
,rx_q_threshold
,oam_q_threshold
,g_atm_dev.cbm.free_cell_cnt
);
//QSB
buf_off+=sprintf(buf+buf_off,"[QSB]\n\ttau=%u\n\ttstepc=%u\n\tsbl=%u\n"
,g_atm_dev.qsb.tau
,g_atm_dev.qsb.tstepc
,g_atm_dev.qsb.sbl
);
buf_off+=sprintf(buf+buf_off,"[Debugging]\n\taal5_need_copy=%u\n",g_atm_dev.aal5.cnt_cpy);
break;
case PROC_VCC:
for(i=CBM_DEFAULT_Q_OFFSET,j=0;i<g_atm_dev.cbm.max_q_off+CBM_DEFAULT_Q_OFFSET;i++){
if (g_atm_dev.queues[i].free!=1){
buf_off+=sprintf(buf+buf_off,"vcc[%u]\n\tvpi=%u vci=%u itf=%u qid=%u access_time=%u.%u\n"
,j++
,g_atm_dev.queues[i].vcc->vpi
,g_atm_dev.queues[i].vcc->vci
,g_atm_dev.queues[i].vcc->itf
,i
,(u32)g_atm_dev.queues[i+CBM_RX_OFFSET].access_time.tv_sec
,(u32)g_atm_dev.queues[i+CBM_RX_OFFSET].access_time.tv_usec
);
buf_off+=sprintf(buf+buf_off,"\tqos_tx class=%u max_pcr=%u pcr=%u min_pcr=%u scr=%u mbs=%u cdv=%u\n"
,g_atm_dev.queues[i].vcc->qos.txtp.traffic_class
,g_atm_dev.queues[i].vcc->qos.txtp.max_pcr
,g_atm_dev.queues[i].vcc->qos.txtp.pcr
,g_atm_dev.queues[i].vcc->qos.txtp.min_pcr
,g_atm_dev.queues[i].vcc->qos.txtp.scr
,g_atm_dev.queues[i].vcc->qos.txtp.mbs
,g_atm_dev.queues[i].vcc->qos.txtp.cdv
);
buf_off+=sprintf(buf+buf_off,"\tqos_rx class=%u max_pcr=%u pcr=%u min_pcr=%u scr=%u mbs=%u cdv=%u\n"
,g_atm_dev.queues[i].vcc->qos.rxtp.traffic_class
,g_atm_dev.queues[i].vcc->qos.rxtp.max_pcr
,g_atm_dev.queues[i].vcc->qos.rxtp.pcr
,g_atm_dev.queues[i].vcc->qos.rxtp.min_pcr
,g_atm_dev.queues[i].vcc->qos.rxtp.scr
,g_atm_dev.queues[i].vcc->qos.rxtp.mbs
,g_atm_dev.queues[i].vcc->qos.rxtp.cdv
);
__amazon_atm_vcc_mib((i+CBM_RX_OFFSET),&mib_vcc);
buf_off+=sprintf(buf+buf_off,"\tCRC error=%u\n", mib_vcc.aal5VccCrcErrors);
buf_off+=sprintf(buf+buf_off,"\toversized packet=%u\n", mib_vcc.aal5VccOverSizedSDUs);
#ifdef AMAZON_ATM_DEBUG
if ( valid_qid(i+CBM_RX_OFFSET)){
buf_off+=sprintf(buf+buf_off,"\tdownstream statics\n" );
buf_off+=sprintf(buf+buf_off,"\t\tpackets=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_PKT]);
buf_off+=sprintf(buf+buf_off,"\t\terr_packets=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_ERR] );
buf_off+=sprintf(buf+buf_off,"\t\tsw_dropped=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_SW_DROP] );
}
buf_off+=sprintf(buf+buf_off,"\tupstream statics\n" );
buf_off+=sprintf(buf+buf_off,"\t\tpackets=%u\n",g_atm_dev.queues[i].qs[QS_PKT]);
buf_off+=sprintf(buf+buf_off,"\t\terr_packets=%u\n",g_atm_dev.queues[i].qs[QS_ERR] );
buf_off+=sprintf(buf+buf_off,"\t\thw_dropped=%u\n",g_atm_dev.queues[i].qs[QS_HW_DROP] );
buf_off+=sprintf(buf+buf_off,"\t\tsw_dropped=%u\n",g_atm_dev.queues[i].qs[QS_SW_DROP] );
#endif
}
}
break;
default:
break;
}
if(buf_off>0) *eof = 1;
return buf_off;
}
#ifdef AMAZON_TPE_AAL5_RECOVERY
extern int (*tpe_reset)(void);
extern int (*tpe_start)(void);
extern int (*tpe_inject)(void);
/* Brief: Reset TPE hardware
* Description
* This is a wordaround for AAL5 bug. It tries to reset TPE.
* take care of software
* setup all previous connection
*/
int amazon_tpe_reset(void)
{
struct atm_vcc * vcc;
int err=0;
int i;
u8 * qd_addr;
u32 reg_l, reg_h;
unsigned int a_cfg_value=0;
unsigned int a_cfg_old_value=0;
atm_aal5_ifEntry_t mib_aal5;
atm_cell_ifEntry_t mib_cell;
//make sure all cells transmitting out first
//Segmentation done
amazon_atm_aal5_mib(&mib_aal5);
reg_l = g_atm_dev.mib_counter.tx_cnt_l;
reg_h = g_atm_dev.mib_counter.tx_cnt_h;
while(1){
mdelay(10);
amazon_atm_aal5_mib(&mib_aal5);
if( (reg_l == g_atm_dev.mib_counter.tx_cnt_l) && (reg_h == g_atm_dev.mib_counter.tx_cnt_h) ){
break;
}
AMAZON_TPE_DMSG("AAL5 Segmentation still in progress!\n");
reg_l = g_atm_dev.mib_counter.tx_cnt_l;
reg_h = g_atm_dev.mib_counter.tx_cnt_h;
}
//QSB done
qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
for (i=1;i<15;i++){
while ( (err=readl(qd_addr+i*CBM_QD_SIZE+0x8)&0xffff) !=0 ){
mdelay(20);
AMAZON_TPE_DMSG("queue %u not empty (%u)\n",i,err);
}
}
//insurance for interfaces between Aware and CARB
mdelay(100);
amazon_atm_cell_mib(&mib_cell,0);
amazon_atm_cell_mib(&mib_cell,1);
amazon_atm_aal5_mib(&mib_aal5);
mb();
while ( (AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0) != 0 ) || (AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0) != 0 ) ){
AMAZON_TPE_EMSG("\nwaiting for AWARE");
AMAZON_TPE_EMSG(" BC0 %u ", AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0));
AMAZON_TPE_EMSG(" BC1 %u ", AMAZON_READ_REGISTER_L(AR_CELLRDY_BC1));
AMAZON_TPE_EMSG("\n");
mdelay(1);
}
// disable AAI module
meiDebugRead(A_CFG_ADDR,&a_cfg_value,1);
a_cfg_old_value=a_cfg_value;
a_cfg_value &= (~(0x2800));
meiDebugWrite(A_CFG_ADDR,&a_cfg_value,1);
//clear buffer
a_cfg_value = 0x1;
meiDebugWrite(AR_CB0_STATUS_ADDR,&a_cfg_value,1);
meiDebugWrite(AR_CB1_STATUS_ADDR,&a_cfg_value,1);
if ( atm_init_hard(&g_atm_dev) != 0){
return -EIO;
}
sema_init(&(g_atm_dev.swie.in_sem), 1);
//SWIE lock
clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
//SWIE wait queue
init_waitqueue_head(&(g_atm_dev.swie.sleep));
for (i=CBM_DEFAULT_Q_OFFSET;i<AMAZON_ATM_MAX_QUEUE_NUM/2;i++) {
vcc = g_atm_dev.queues[i].vcc;
if (vcc != NULL){
set_qsb(vcc, &vcc->qos, i);
set_qd(vcc, i);
mb();
err=set_htu(vcc,i);
if (err){
AMAZON_TPE_EMSG("set htu entry fails %u\n",err);
}
}
}
meiDebugWrite(A_CFG_ADDR,&a_cfg_old_value,1);
#if 0
//reset DFE
*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) | (AMAZON_RST_REQ_DFE);
mb();
*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) & (~AMAZON_RST_REQ_DFE);
mb();
#endif
return 0;
}
/* Brief: Send a ATM EoP packet to save DMA channel
*/
int amazon_tpe_inject_debug_cell(void)
{
//Send a ATM cell to save DMA channel
u8 qid;
unsigned char atm_cell[48];
qid = 0x11;
AMAZON_TPE_DMSG("qid = %d\n",qid);
memset(atm_cell,0,48);
atm_cell[3] = 0x2;
if ( amazon_atm_swin(qid,atm_cell)) {
AMAZON_TPE_EMSG("cannot insert EoP cell\n");
return -1;
}
return 0;
}
/* Brief: start HTU (TPE)
*/
int amazon_tpe_start(void)
{
AMAZON_WRITE_REGISTER_L(HTU_CFG_START ,HTU_CFG_ADDR);
wmb();
return 0;
}
#endif //AMAZON_TPE_AAL5_RECOVERY
#ifdef AMAZON_CHECK_LINK
extern int (*adsl_link_notify)(int);
/* Brief: notify link status of ADSL link
* Parameters: 0 link down
* 1 link up
* Returns: 0 OK
* Details: called by MEI driver
* should update status and inform upper layer
*/
int amazon_tpe_link_notify(int status)
{
adsl_link_status = status;
AMAZON_TPE_DMSG("link status %s\n",(status==1)?"Up":"Down");
if (status == 0){
//wait until no cells in upstream queues
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(2*HZ);
}
return 0;
}
#endif //ifdef AMAZON_CHECK_LINK
/*
* Brief: Initialize ATM module
*
* Return Value: ENOMEM - No memory available
* EBUSY - Cannot register atm device
* ERESTARTSYS - Process interrupted by other signal
* 0 - OK, module initialized
*
* Description:
* This function registers an atm device for all UTOPIA devices.
* It also allocates memory for the private device data structures
*/
int __init amazon_atm_net_init(void)
{
int i;
int err=0;
amazon_atm_dev_t *dev = NULL;
if ((dev=amazon_atm_create()) != NULL){
for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
if (!dev->ports[i].enable){
amazon_atm_devs[i] = NULL;
continue;
}
amazon_atm_devs[i] =atm_dev_register("amazon_atm",&amazon_atm_ops,-1,0UL);
if (amazon_atm_devs[i] == NULL){
AMAZON_TPE_EMSG("atm_dev_register fails\n");
err = -EIO;
goto amazon_atm_net_init_exit;
}else{
AMAZON_TPE_DMSG("registering device %u\n",i);
amazon_atm_devs[i]->ci_range.vpi_bits = 8;
amazon_atm_devs[i]->ci_range.vci_bits = 16;
amazon_atm_devs[i]->link_rate = dev->ports[i].tx_max_cr;
amazon_atm_devs[i]->dev_data = (void *) i;
}
}
}else{
err = -ENOMEM;
AMAZON_TPE_EMSG("cannot init atm device\n");
goto amazon_atm_net_init_exit;
}
#ifdef AMAZON_TPE_AAL5_RECOVERY
tpe_reset = & amazon_tpe_reset;
tpe_start = & amazon_tpe_start;
tpe_inject = & amazon_tpe_inject_debug_cell;
#endif //AMAZON_TPE_AAL5_RECOVERY
#ifdef AMAZON_CHECK_LINK
adsl_link_notify=amazon_tpe_link_notify;
#endif //AMAZON_CHECK_LINK
amazon_atm_net_init_exit:
return err;
}
void __exit amazon_atm_net_cleanup(void)
{
int i;
amazon_atm_cleanup();
for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
if (amazon_atm_devs[i] != NULL){
AMAZON_TPE_DMSG("unregister dev %u\n",i);
atm_dev_deregister(amazon_atm_devs[i]);
}
}
return;
}
EXPORT_SYMBOL(get_oam_time_stamp);
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Infineon IFAP DC COM peng.liu@infineon.com");
MODULE_DESCRIPTION("AMAZON ATM driver");
module_init(amazon_atm_net_init);
module_exit(amazon_atm_net_cleanup);
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