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openwrt/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c

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/******************************************************************************
**
** FILE NAME : ifxmips_ptm_vdsl.c
** PROJECT : UEIP
** MODULES : PTM
**
** DATE : 7 Jul 2009
** AUTHOR : Xu Liang
** DESCRIPTION : PTM driver common source file (core functions for VR9)
** COPYRIGHT : Copyright (c) 2006
** Infineon Technologies AG
** Am Campeon 1-12, 85579 Neubiberg, Germany
**
** 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.
**
** HISTORY
** $Date $Author $Comment
** 07 JUL 2009 Xu Liang Init Version
*******************************************************************************/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/ctype.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include "ifxmips_ptm_vdsl.h"
#include <lantiq_soc.h>
#define MODULE_PARM_ARRAY(a, b) module_param_array(a, int, NULL, 0)
#define MODULE_PARM(a, b) module_param(a, int, 0)
static int wanqos_en = 0;
static int queue_gamma_map[4] = {0xFE, 0x01, 0x00, 0x00};
MODULE_PARM(wanqos_en, "i");
MODULE_PARM_DESC(wanqos_en, "WAN QoS support, 1 - enabled, 0 - disabled.");
MODULE_PARM_ARRAY(queue_gamma_map, "4-4i");
MODULE_PARM_DESC(queue_gamma_map, "TX QoS queues mapping to 4 TX Gamma interfaces.");
extern int (*ifx_mei_atm_showtime_enter)(struct port_cell_info *, void *);
extern int (*ifx_mei_atm_showtime_exit)(void);
extern int ifx_mei_atm_showtime_check(int *is_showtime, struct port_cell_info *port_cell, void **xdata_addr);
static int g_showtime = 0;
static void *g_xdata_addr = NULL;
#define ENABLE_TMP_DBG 0
unsigned long cgu_get_pp32_clock(void)
{
struct clk *c = clk_get_ppe();
unsigned long rate = clk_get_rate(c);
clk_put(c);
return rate;
}
static void ptm_setup(struct net_device *, int);
static struct net_device_stats *ptm_get_stats(struct net_device *);
static int ptm_open(struct net_device *);
static int ptm_stop(struct net_device *);
static unsigned int ptm_poll(int, unsigned int);
static int ptm_napi_poll(struct napi_struct *, int);
static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,6,0)
static void ptm_tx_timeout(struct net_device *);
#else
static void ptm_tx_timeout(struct net_device *, unsigned int txqueue);
#endif
static inline struct sk_buff* alloc_skb_rx(void);
static inline struct sk_buff* alloc_skb_tx(unsigned int);
static inline struct sk_buff *get_skb_pointer(unsigned int);
static inline int get_tx_desc(unsigned int, unsigned int *);
/*
* Mailbox handler and signal function
*/
static irqreturn_t mailbox_irq_handler(int, void *);
/*
* Tasklet to Handle Swap Descriptors
*/
static void do_swap_desc_tasklet(unsigned long);
/*
* Init & clean-up functions
*/
static inline int init_priv_data(void);
static inline void clear_priv_data(void);
static inline int init_tables(void);
static inline void clear_tables(void);
static int g_wanqos_en = 0;
static int g_queue_gamma_map[4];
static struct ptm_priv_data g_ptm_priv_data;
static struct net_device_ops g_ptm_netdev_ops = {
.ndo_get_stats = ptm_get_stats,
.ndo_open = ptm_open,
.ndo_stop = ptm_stop,
.ndo_start_xmit = ptm_hard_start_xmit,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
static struct net_device *g_net_dev[1] = {0};
static char *g_net_dev_name[1] = {"dsl0"};
static int g_ptm_prio_queue_map[8];
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,9,0)
static DECLARE_TASKLET(g_swap_desc_tasklet, do_swap_desc_tasklet, 0);
#else
static DECLARE_TASKLET_OLD(g_swap_desc_tasklet, do_swap_desc_tasklet);
#endif
unsigned int ifx_ptm_dbg_enable = DBG_ENABLE_MASK_ERR;
/*
* ####################################
* Local Function
* ####################################
*/
static void ptm_setup(struct net_device *dev, int ndev)
{
u8 addr[ETH_ALEN];
netif_carrier_off(dev);
dev->netdev_ops = &g_ptm_netdev_ops;
/* Allow up to 1508 bytes, for RFC4638 */
dev->max_mtu = ETH_DATA_LEN + 8;
netif_napi_add(dev, &g_ptm_priv_data.itf[ndev].napi, ptm_napi_poll, 16);
dev->watchdog_timeo = ETH_WATCHDOG_TIMEOUT;
addr[0] = 0x00;
addr[1] = 0x20;
addr[2] = 0xda;
addr[3] = 0x86;
addr[4] = 0x23;
addr[5] = 0x75 + ndev;
eth_hw_addr_set(dev, addr);
}
static struct net_device_stats *ptm_get_stats(struct net_device *dev)
{
struct net_device_stats *s;
if ( dev != g_net_dev[0] )
return NULL;
s = &g_ptm_priv_data.itf[0].stats;
return s;
}
static int ptm_open(struct net_device *dev)
{
ASSERT(dev == g_net_dev[0], "incorrect device");
napi_enable(&g_ptm_priv_data.itf[0].napi);
IFX_REG_W32_MASK(0, 1, MBOX_IGU1_IER);
netif_start_queue(dev);
return 0;
}
static int ptm_stop(struct net_device *dev)
{
ASSERT(dev == g_net_dev[0], "incorrect device");
IFX_REG_W32_MASK(1 | (1 << 17), 0, MBOX_IGU1_IER);
napi_disable(&g_ptm_priv_data.itf[0].napi);
netif_stop_queue(dev);
return 0;
}
static unsigned int ptm_poll(int ndev, unsigned int work_to_do)
{
unsigned int work_done = 0;
volatile struct rx_descriptor *desc;
struct rx_descriptor reg_desc;
struct sk_buff *skb, *new_skb;
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
while ( work_done < work_to_do ) {
desc = &WAN_RX_DESC_BASE[g_ptm_priv_data.itf[0].rx_desc_pos];
if ( desc->own /* || !desc->c */ ) // if PP32 hold descriptor or descriptor not completed
break;
if ( ++g_ptm_priv_data.itf[0].rx_desc_pos == WAN_RX_DESC_NUM )
g_ptm_priv_data.itf[0].rx_desc_pos = 0;
reg_desc = *desc;
skb = get_skb_pointer(reg_desc.dataptr);
ASSERT(skb != NULL, "invalid pointer skb == NULL");
new_skb = alloc_skb_rx();
if ( new_skb != NULL ) {
skb_reserve(skb, reg_desc.byteoff);
skb_put(skb, reg_desc.datalen);
// parse protocol header
skb->dev = g_net_dev[0];
skb->protocol = eth_type_trans(skb, skb->dev);
netif_receive_skb(skb);
g_ptm_priv_data.itf[0].stats.rx_packets++;
g_ptm_priv_data.itf[0].stats.rx_bytes += reg_desc.datalen;
reg_desc.dataptr = (unsigned int)new_skb->data & 0x0FFFFFFF;
reg_desc.byteoff = RX_HEAD_MAC_ADDR_ALIGNMENT;
}
reg_desc.datalen = RX_MAX_BUFFER_SIZE - RX_HEAD_MAC_ADDR_ALIGNMENT;
reg_desc.own = 1;
reg_desc.c = 0;
/* write discriptor to memory */
*((volatile unsigned int *)desc + 1) = *((unsigned int *)&reg_desc + 1);
wmb();
*(volatile unsigned int *)desc = *(unsigned int *)&reg_desc;
work_done++;
}
return work_done;
}
static int ptm_napi_poll(struct napi_struct *napi, int budget)
{
int ndev = 0;
unsigned int work_done;
work_done = ptm_poll(ndev, budget);
// interface down
if ( !netif_running(napi->dev) ) {
napi_complete(napi);
return work_done;
}
// clear interrupt
IFX_REG_W32_MASK(0, 1, MBOX_IGU1_ISRC);
// no more traffic
if (work_done < budget) {
napi_complete(napi);
IFX_REG_W32_MASK(0, 1, MBOX_IGU1_IER);
return work_done;
}
// next round
return work_done;
}
static int ptm_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
unsigned int f_full;
int desc_base;
volatile struct tx_descriptor *desc;
struct tx_descriptor reg_desc = {0};
struct sk_buff *skb_to_free;
unsigned int byteoff;
ASSERT(dev == g_net_dev[0], "incorrect device");
if ( !g_showtime ) {
err("not in showtime");
goto PTM_HARD_START_XMIT_FAIL;
}
/* allocate descriptor */
desc_base = get_tx_desc(0, &f_full);
if ( f_full ) {
netif_trans_update(dev);
netif_stop_queue(dev);
IFX_REG_W32_MASK(0, 1 << 17, MBOX_IGU1_ISRC);
IFX_REG_W32_MASK(0, 1 << 17, MBOX_IGU1_IER);
}
if ( desc_base < 0 )
goto PTM_HARD_START_XMIT_FAIL;
desc = &CPU_TO_WAN_TX_DESC_BASE[desc_base];
byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1);
if ( skb_headroom(skb) < sizeof(struct sk_buff *) + byteoff || skb_cloned(skb) ) {
struct sk_buff *new_skb;
ASSERT(skb_headroom(skb) >= sizeof(struct sk_buff *) + byteoff, "skb_headroom(skb) < sizeof(struct sk_buff *) + byteoff");
ASSERT(!skb_cloned(skb), "skb is cloned");
new_skb = alloc_skb_tx(skb->len);
if ( new_skb == NULL ) {
dbg("no memory");
goto ALLOC_SKB_TX_FAIL;
}
skb_put(new_skb, skb->len);
memcpy(new_skb->data, skb->data, skb->len);
dev_kfree_skb_any(skb);
skb = new_skb;
byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1);
/* write back to physical memory */
dma_cache_wback((unsigned long)skb->data, skb->len);
}
/* make the skb unowned */
skb_orphan(skb);
*(struct sk_buff **)((unsigned int)skb->data - byteoff - sizeof(struct sk_buff *)) = skb;
/* write back to physical memory */
dma_cache_wback((unsigned long)skb->data - byteoff - sizeof(struct sk_buff *), skb->len + byteoff + sizeof(struct sk_buff *));
/* free previous skb */
skb_to_free = get_skb_pointer(desc->dataptr);
if ( skb_to_free != NULL )
dev_kfree_skb_any(skb_to_free);
/* update descriptor */
reg_desc.small = 0;
reg_desc.dataptr = (unsigned int)skb->data & (0x0FFFFFFF ^ (DATA_BUFFER_ALIGNMENT - 1));
reg_desc.datalen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
reg_desc.qid = g_ptm_prio_queue_map[skb->priority > 7 ? 7 : skb->priority];
reg_desc.byteoff = byteoff;
reg_desc.own = 1;
reg_desc.c = 1;
reg_desc.sop = reg_desc.eop = 1;
/* update MIB */
g_ptm_priv_data.itf[0].stats.tx_packets++;
g_ptm_priv_data.itf[0].stats.tx_bytes += reg_desc.datalen;
/* write discriptor to memory */
*((volatile unsigned int *)desc + 1) = *((unsigned int *)&reg_desc + 1);
wmb();
*(volatile unsigned int *)desc = *(unsigned int *)&reg_desc;
netif_trans_update(dev);
return 0;
ALLOC_SKB_TX_FAIL:
PTM_HARD_START_XMIT_FAIL:
dev_kfree_skb_any(skb);
g_ptm_priv_data.itf[0].stats.tx_dropped++;
return 0;
}
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
ASSERT(dev == g_net_dev[0], "incorrect device");
switch ( cmd )
{
case IFX_PTM_MIB_CW_GET:
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxNoIdleCodewords = IFX_REG_R32(DREG_AR_CELL0) + IFX_REG_R32(DREG_AR_CELL1);
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxIdleCodewords = IFX_REG_R32(DREG_AR_IDLE_CNT0) + IFX_REG_R32(DREG_AR_IDLE_CNT1);
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxCodingViolation = IFX_REG_R32(DREG_AR_CVN_CNT0) + IFX_REG_R32(DREG_AR_CVN_CNT1) + IFX_REG_R32(DREG_AR_CVNP_CNT0) + IFX_REG_R32(DREG_AR_CVNP_CNT1);
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifTxNoIdleCodewords = IFX_REG_R32(DREG_AT_CELL0) + IFX_REG_R32(DREG_AT_CELL1);
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifTxIdleCodewords = IFX_REG_R32(DREG_AT_IDLE_CNT0) + IFX_REG_R32(DREG_AT_IDLE_CNT1);
break;
case IFX_PTM_MIB_FRAME_GET:
{
PTM_FRAME_MIB_T data = {0};
int i;
data.RxCorrect = IFX_REG_R32(DREG_AR_HEC_CNT0) + IFX_REG_R32(DREG_AR_HEC_CNT1) + IFX_REG_R32(DREG_AR_AIIDLE_CNT0) + IFX_REG_R32(DREG_AR_AIIDLE_CNT1);
for ( i = 0; i < 4; i++ )
data.RxDropped += WAN_RX_MIB_TABLE(i)->wrx_dropdes_pdu;
for ( i = 0; i < 8; i++ )
data.TxSend += WAN_TX_MIB_TABLE(i)->wtx_total_pdu;
*((PTM_FRAME_MIB_T *)ifr->ifr_data) = data;
}
break;
case IFX_PTM_CFG_GET:
// use bear channel 0 preemption gamma interface settings
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcPresent = 1;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcCheck = RX_GAMMA_ITF_CFG(0)->rx_eth_fcs_ver_dis == 0 ? 1 : 0;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcCheck = RX_GAMMA_ITF_CFG(0)->rx_tc_crc_ver_dis == 0 ? 1 : 0;;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen = RX_GAMMA_ITF_CFG(0)->rx_tc_crc_size == 0 ? 0 : (RX_GAMMA_ITF_CFG(0)->rx_tc_crc_size * 16);
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxEthCrcGen = TX_GAMMA_ITF_CFG(0)->tx_eth_fcs_gen_dis == 0 ? 1 : 0;
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcGen = TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size == 0 ? 0 : 1;
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen = TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size == 0 ? 0 : (TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size * 16);
break;
case IFX_PTM_CFG_SET:
{
int i;
for ( i = 0; i < 4; i++ ) {
RX_GAMMA_ITF_CFG(i)->rx_eth_fcs_ver_dis = ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcCheck ? 0 : 1;
RX_GAMMA_ITF_CFG(0)->rx_tc_crc_ver_dis = ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcCheck ? 0 : 1;
switch ( ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen ) {
case 16: RX_GAMMA_ITF_CFG(0)->rx_tc_crc_size = 1; break;
case 32: RX_GAMMA_ITF_CFG(0)->rx_tc_crc_size = 2; break;
default: RX_GAMMA_ITF_CFG(0)->rx_tc_crc_size = 0;
}
TX_GAMMA_ITF_CFG(0)->tx_eth_fcs_gen_dis = ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxEthCrcGen ? 0 : 1;
if ( ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcGen ) {
switch ( ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen ) {
case 16: TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size = 1; break;
case 32: TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size = 2; break;
default: TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size = 0;
}
}
else
TX_GAMMA_ITF_CFG(0)->tx_tc_crc_size = 0;
}
}
break;
case IFX_PTM_MAP_PKT_PRIO_TO_Q:
{
struct ppe_prio_q_map cmd;
if ( copy_from_user(&cmd, ifr->ifr_data, sizeof(cmd)) )
return -EFAULT;
if ( cmd.pkt_prio < 0 || cmd.pkt_prio >= ARRAY_SIZE(g_ptm_prio_queue_map) )
return -EINVAL;
if ( cmd.qid < 0 || cmd.qid >= g_wanqos_en )
return -EINVAL;
g_ptm_prio_queue_map[cmd.pkt_prio] = cmd.qid;
}
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,6,0)
static void ptm_tx_timeout(struct net_device *dev)
#else
static void ptm_tx_timeout(struct net_device *dev, unsigned int txqueue)
#endif
{
ASSERT(dev == g_net_dev[0], "incorrect device");
/* disable TX irq, release skb when sending new packet */
IFX_REG_W32_MASK(1 << 17, 0, MBOX_IGU1_IER);
/* wake up TX queue */
netif_wake_queue(dev);
return;
}
static inline struct sk_buff* alloc_skb_rx(void)
{
struct sk_buff *skb;
/* allocate memroy including trailer and padding */
skb = dev_alloc_skb(RX_MAX_BUFFER_SIZE + DATA_BUFFER_ALIGNMENT);
if ( skb != NULL ) {
/* must be burst length alignment and reserve two more bytes for MAC address alignment */
if ( ((unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1)) != 0 )
skb_reserve(skb, ~((unsigned int)skb->data + (DATA_BUFFER_ALIGNMENT - 1)) & (DATA_BUFFER_ALIGNMENT - 1));
/* pub skb in reserved area "skb->data - 4" */
*((struct sk_buff **)skb->data - 1) = skb;
wmb();
/* write back and invalidate cache */
dma_cache_wback_inv((unsigned long)skb->data - sizeof(skb), sizeof(skb));
/* invalidate cache */
dma_cache_inv((unsigned long)skb->data, (unsigned int)skb->end - (unsigned int)skb->data);
}
return skb;
}
static inline struct sk_buff* alloc_skb_tx(unsigned int size)
{
struct sk_buff *skb;
/* allocate memory including padding */
size = RX_MAX_BUFFER_SIZE;
size = (size + DATA_BUFFER_ALIGNMENT - 1) & ~(DATA_BUFFER_ALIGNMENT - 1);
skb = dev_alloc_skb(size + DATA_BUFFER_ALIGNMENT);
/* must be burst length alignment */
if ( skb != NULL )
skb_reserve(skb, ~((unsigned int)skb->data + (DATA_BUFFER_ALIGNMENT - 1)) & (DATA_BUFFER_ALIGNMENT - 1));
return skb;
}
static inline struct sk_buff *get_skb_pointer(unsigned int dataptr)
{
unsigned int skb_dataptr;
struct sk_buff *skb;
// usually, CPE memory is less than 256M bytes
// so NULL means invalid pointer
if ( dataptr == 0 ) {
dbg("dataptr is 0, it's supposed to be invalid pointer");
return NULL;
}
skb_dataptr = (dataptr - 4) | KSEG1;
skb = *(struct sk_buff **)skb_dataptr;
ASSERT((unsigned int)skb >= KSEG0, "invalid skb - skb = %#08x, dataptr = %#08x", (unsigned int)skb, dataptr);
ASSERT((((unsigned int)skb->data & (0x0FFFFFFF ^ (DATA_BUFFER_ALIGNMENT - 1))) | KSEG1) == (dataptr | KSEG1), "invalid skb - skb = %#08x, skb->data = %#08x, dataptr = %#08x", (unsigned int)skb, (unsigned int)skb->data, dataptr);
return skb;
}
static inline int get_tx_desc(unsigned int itf, unsigned int *f_full)
{
int desc_base = -1;
struct ptm_itf *p_itf = &g_ptm_priv_data.itf[0];
// assume TX is serial operation
// no protection provided
*f_full = 1;
if ( CPU_TO_WAN_TX_DESC_BASE[p_itf->tx_desc_pos].own == 0 ) {
desc_base = p_itf->tx_desc_pos;
if ( ++(p_itf->tx_desc_pos) == CPU_TO_WAN_TX_DESC_NUM )
p_itf->tx_desc_pos = 0;
if ( CPU_TO_WAN_TX_DESC_BASE[p_itf->tx_desc_pos].own == 0 )
*f_full = 0;
}
return desc_base;
}
static irqreturn_t mailbox_irq_handler(int irq, void *dev_id)
{
unsigned int isr;
isr = IFX_REG_R32(MBOX_IGU1_ISR);
IFX_REG_W32(isr, MBOX_IGU1_ISRC);
isr &= IFX_REG_R32(MBOX_IGU1_IER);
if (isr & BIT(0)) {
IFX_REG_W32_MASK(1, 0, MBOX_IGU1_IER);
napi_schedule(&g_ptm_priv_data.itf[0].napi);
#if defined(ENABLE_TMP_DBG) && ENABLE_TMP_DBG
{
volatile struct rx_descriptor *desc = &WAN_RX_DESC_BASE[g_ptm_priv_data.itf[0].rx_desc_pos];
if ( desc->own ) { // PP32 hold
err("invalid interrupt");
}
}
#endif
}
if (isr & BIT(16)) {
IFX_REG_W32_MASK(1 << 16, 0, MBOX_IGU1_IER);
tasklet_hi_schedule(&g_swap_desc_tasklet);
}
if (isr & BIT(17)) {
IFX_REG_W32_MASK(1 << 17, 0, MBOX_IGU1_IER);
netif_wake_queue(g_net_dev[0]);
}
return IRQ_HANDLED;
}
static void do_swap_desc_tasklet(unsigned long arg)
{
int budget = 32;
volatile struct tx_descriptor *desc;
struct sk_buff *skb;
unsigned int byteoff;
while ( budget-- > 0 ) {
if ( WAN_SWAP_DESC_BASE[g_ptm_priv_data.itf[0].tx_swap_desc_pos].own ) // if PP32 hold descriptor
break;
desc = &WAN_SWAP_DESC_BASE[g_ptm_priv_data.itf[0].tx_swap_desc_pos];
if ( ++g_ptm_priv_data.itf[0].tx_swap_desc_pos == WAN_SWAP_DESC_NUM )
g_ptm_priv_data.itf[0].tx_swap_desc_pos = 0;
skb = get_skb_pointer(desc->dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
skb = alloc_skb_tx(RX_MAX_BUFFER_SIZE);
if ( skb == NULL )
panic("can't allocate swap buffer for PPE firmware use\n");
byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1);
*(struct sk_buff **)((unsigned int)skb->data - byteoff - sizeof(struct sk_buff *)) = skb;
desc->dataptr = (unsigned int)skb->data & 0x0FFFFFFF;
desc->own = 1;
}
// clear interrupt
IFX_REG_W32_MASK(0, 16, MBOX_IGU1_ISRC);
// no more skb to be replaced
if ( WAN_SWAP_DESC_BASE[g_ptm_priv_data.itf[0].tx_swap_desc_pos].own ) { // if PP32 hold descriptor
IFX_REG_W32_MASK(0, 1 << 16, MBOX_IGU1_IER);
return;
}
tasklet_hi_schedule(&g_swap_desc_tasklet);
return;
}
static inline int ifx_ptm_version(char *buf)
{
int len = 0;
unsigned int major, mid, minor;
ifx_ptm_get_fw_ver(&major, &mid, &minor);
len += ifx_drv_ver(buf + len, "PTM", IFX_PTM_VER_MAJOR, IFX_PTM_VER_MID, IFX_PTM_VER_MINOR);
if ( mid == ~0 )
len += sprintf(buf + len, " PTM (E1) firmware version %u.%u\n", major, minor);
else
len += sprintf(buf + len, " PTM (E1) firmware version %u.%u.%u\n", major, mid, minor);
return len;
}
static inline int init_priv_data(void)
{
int i, j;
g_wanqos_en = wanqos_en ? wanqos_en : 8;
if ( g_wanqos_en > 8 )
g_wanqos_en = 8;
for ( i = 0; i < ARRAY_SIZE(g_queue_gamma_map); i++ )
{
g_queue_gamma_map[i] = queue_gamma_map[i] & ((1 << g_wanqos_en) - 1);
for ( j = 0; j < i; j++ )
g_queue_gamma_map[i] &= ~g_queue_gamma_map[j];
}
memset(&g_ptm_priv_data, 0, sizeof(g_ptm_priv_data));
{
int max_packet_priority = ARRAY_SIZE(g_ptm_prio_queue_map);
int tx_num_q;
int q_step, q_accum, p_step;
tx_num_q = __ETH_WAN_TX_QUEUE_NUM;
q_step = tx_num_q - 1;
p_step = max_packet_priority - 1;
for ( j = 0, q_accum = 0; j < max_packet_priority; j++, q_accum += q_step )
g_ptm_prio_queue_map[j] = q_step - (q_accum + (p_step >> 1)) / p_step;
}
return 0;
}
static inline void clear_priv_data(void)
{
}
static inline int init_tables(void)
{
struct sk_buff *skb_pool[WAN_RX_DESC_NUM] = {0};
struct cfg_std_data_len cfg_std_data_len = {0};
struct tx_qos_cfg tx_qos_cfg = {0};
struct psave_cfg psave_cfg = {0};
struct eg_bwctrl_cfg eg_bwctrl_cfg = {0};
struct test_mode test_mode = {0};
struct rx_bc_cfg rx_bc_cfg = {0};
struct tx_bc_cfg tx_bc_cfg = {0};
struct gpio_mode gpio_mode = {0};
struct gpio_wm_cfg gpio_wm_cfg = {0};
struct rx_gamma_itf_cfg rx_gamma_itf_cfg = {0};
struct tx_gamma_itf_cfg tx_gamma_itf_cfg = {0};
struct wtx_qos_q_desc_cfg wtx_qos_q_desc_cfg = {0};
struct rx_descriptor rx_desc = {0};
struct tx_descriptor tx_desc = {0};
int i;
for ( i = 0; i < WAN_RX_DESC_NUM; i++ ) {
skb_pool[i] = alloc_skb_rx();
if ( skb_pool[i] == NULL )
goto ALLOC_SKB_RX_FAIL;
}
cfg_std_data_len.byte_off = RX_HEAD_MAC_ADDR_ALIGNMENT; // this field replaces byte_off in rx descriptor of VDSL ingress
cfg_std_data_len.data_len = 1600;
*CFG_STD_DATA_LEN = cfg_std_data_len;
tx_qos_cfg.time_tick = cgu_get_pp32_clock() / 62500; // 16 * (cgu_get_pp32_clock() / 1000000)
tx_qos_cfg.overhd_bytes = 0;
tx_qos_cfg.eth1_eg_qnum = __ETH_WAN_TX_QUEUE_NUM;
tx_qos_cfg.eth1_burst_chk = 1;
tx_qos_cfg.eth1_qss = 0;
tx_qos_cfg.shape_en = 0; // disable
tx_qos_cfg.wfq_en = 0; // strict priority
*TX_QOS_CFG = tx_qos_cfg;
psave_cfg.start_state = 0;
psave_cfg.sleep_en = 1; // enable sleep mode
*PSAVE_CFG = psave_cfg;
eg_bwctrl_cfg.fdesc_wm = 16;
eg_bwctrl_cfg.class_len = 128;
*EG_BWCTRL_CFG = eg_bwctrl_cfg;
//*GPIO_ADDR = (unsigned int)IFX_GPIO_P0_OUT;
*GPIO_ADDR = (unsigned int)0x00000000; // disabled by default
gpio_mode.gpio_bit_bc1 = 2;
gpio_mode.gpio_bit_bc0 = 1;
gpio_mode.gpio_bc1_en = 0;
gpio_mode.gpio_bc0_en = 0;
*GPIO_MODE = gpio_mode;
gpio_wm_cfg.stop_wm_bc1 = 2;
gpio_wm_cfg.start_wm_bc1 = 4;
gpio_wm_cfg.stop_wm_bc0 = 2;
gpio_wm_cfg.start_wm_bc0 = 4;
*GPIO_WM_CFG = gpio_wm_cfg;
test_mode.mib_clear_mode = 0;
test_mode.test_mode = 0;
*TEST_MODE = test_mode;
rx_bc_cfg.local_state = 0;
rx_bc_cfg.remote_state = 0;
rx_bc_cfg.to_false_th = 7;
rx_bc_cfg.to_looking_th = 3;
*RX_BC_CFG(0) = rx_bc_cfg;
*RX_BC_CFG(1) = rx_bc_cfg;
tx_bc_cfg.fill_wm = 2;
tx_bc_cfg.uflw_wm = 2;
*TX_BC_CFG(0) = tx_bc_cfg;
*TX_BC_CFG(1) = tx_bc_cfg;
rx_gamma_itf_cfg.receive_state = 0;
rx_gamma_itf_cfg.rx_min_len = 60;
rx_gamma_itf_cfg.rx_pad_en = 1;
rx_gamma_itf_cfg.rx_eth_fcs_ver_dis = 0;
rx_gamma_itf_cfg.rx_rm_eth_fcs = 1;
rx_gamma_itf_cfg.rx_tc_crc_ver_dis = 0;
rx_gamma_itf_cfg.rx_tc_crc_size = 1;
rx_gamma_itf_cfg.rx_eth_fcs_result = 0xC704DD7B;
rx_gamma_itf_cfg.rx_tc_crc_result = 0x1D0F1D0F;
rx_gamma_itf_cfg.rx_crc_cfg = 0x2500;
rx_gamma_itf_cfg.rx_eth_fcs_init_value = 0xFFFFFFFF;
rx_gamma_itf_cfg.rx_tc_crc_init_value = 0x0000FFFF;
rx_gamma_itf_cfg.rx_max_len_sel = 0;
rx_gamma_itf_cfg.rx_edit_num2 = 0;
rx_gamma_itf_cfg.rx_edit_pos2 = 0;
rx_gamma_itf_cfg.rx_edit_type2 = 0;
rx_gamma_itf_cfg.rx_edit_en2 = 0;
rx_gamma_itf_cfg.rx_edit_num1 = 0;
rx_gamma_itf_cfg.rx_edit_pos1 = 0;
rx_gamma_itf_cfg.rx_edit_type1 = 0;
rx_gamma_itf_cfg.rx_edit_en1 = 0;
rx_gamma_itf_cfg.rx_inserted_bytes_1l = 0;
rx_gamma_itf_cfg.rx_inserted_bytes_1h = 0;
rx_gamma_itf_cfg.rx_inserted_bytes_2l = 0;
rx_gamma_itf_cfg.rx_inserted_bytes_2h = 0;
rx_gamma_itf_cfg.rx_len_adj = -6;
for ( i = 0; i < 4; i++ )
*RX_GAMMA_ITF_CFG(i) = rx_gamma_itf_cfg;
tx_gamma_itf_cfg.tx_len_adj = 6;
tx_gamma_itf_cfg.tx_crc_off_adj = 6;
tx_gamma_itf_cfg.tx_min_len = 0;
tx_gamma_itf_cfg.tx_eth_fcs_gen_dis = 0;
tx_gamma_itf_cfg.tx_tc_crc_size = 1;
tx_gamma_itf_cfg.tx_crc_cfg = 0x2F00;
tx_gamma_itf_cfg.tx_eth_fcs_init_value = 0xFFFFFFFF;
tx_gamma_itf_cfg.tx_tc_crc_init_value = 0x0000FFFF;
for ( i = 0; i < ARRAY_SIZE(g_queue_gamma_map); i++ ) {
tx_gamma_itf_cfg.queue_mapping = g_queue_gamma_map[i];
*TX_GAMMA_ITF_CFG(i) = tx_gamma_itf_cfg;
}
for ( i = 0; i < __ETH_WAN_TX_QUEUE_NUM; i++ ) {
wtx_qos_q_desc_cfg.length = WAN_TX_DESC_NUM;
wtx_qos_q_desc_cfg.addr = __ETH_WAN_TX_DESC_BASE(i);
*WTX_QOS_Q_DESC_CFG(i) = wtx_qos_q_desc_cfg;
}
// default TX queue QoS config is all ZERO
// TX Ctrl K Table
IFX_REG_W32(0x90111293, TX_CTRL_K_TABLE(0));
IFX_REG_W32(0x14959617, TX_CTRL_K_TABLE(1));
IFX_REG_W32(0x18999A1B, TX_CTRL_K_TABLE(2));
IFX_REG_W32(0x9C1D1E9F, TX_CTRL_K_TABLE(3));
IFX_REG_W32(0xA02122A3, TX_CTRL_K_TABLE(4));
IFX_REG_W32(0x24A5A627, TX_CTRL_K_TABLE(5));
IFX_REG_W32(0x28A9AA2B, TX_CTRL_K_TABLE(6));
IFX_REG_W32(0xAC2D2EAF, TX_CTRL_K_TABLE(7));
IFX_REG_W32(0x30B1B233, TX_CTRL_K_TABLE(8));
IFX_REG_W32(0xB43536B7, TX_CTRL_K_TABLE(9));
IFX_REG_W32(0xB8393ABB, TX_CTRL_K_TABLE(10));
IFX_REG_W32(0x3CBDBE3F, TX_CTRL_K_TABLE(11));
IFX_REG_W32(0xC04142C3, TX_CTRL_K_TABLE(12));
IFX_REG_W32(0x44C5C647, TX_CTRL_K_TABLE(13));
IFX_REG_W32(0x48C9CA4B, TX_CTRL_K_TABLE(14));
IFX_REG_W32(0xCC4D4ECF, TX_CTRL_K_TABLE(15));
// init RX descriptor
rx_desc.own = 1;
rx_desc.c = 0;
rx_desc.sop = 1;
rx_desc.eop = 1;
rx_desc.byteoff = RX_HEAD_MAC_ADDR_ALIGNMENT;
rx_desc.datalen = RX_MAX_BUFFER_SIZE - RX_HEAD_MAC_ADDR_ALIGNMENT;
for ( i = 0; i < WAN_RX_DESC_NUM; i++ ) {
rx_desc.dataptr = (unsigned int)skb_pool[i]->data & 0x0FFFFFFF;
WAN_RX_DESC_BASE[i] = rx_desc;
}
// init TX descriptor
tx_desc.own = 0;
tx_desc.c = 0;
tx_desc.sop = 1;
tx_desc.eop = 1;
tx_desc.byteoff = 0;
tx_desc.qid = 0;
tx_desc.datalen = 0;
tx_desc.small = 0;
tx_desc.dataptr = 0;
for ( i = 0; i < CPU_TO_WAN_TX_DESC_NUM; i++ )
CPU_TO_WAN_TX_DESC_BASE[i] = tx_desc;
for ( i = 0; i < WAN_TX_DESC_NUM_TOTAL; i++ )
WAN_TX_DESC_BASE(0)[i] = tx_desc;
// init Swap descriptor
for ( i = 0; i < WAN_SWAP_DESC_NUM; i++ )
WAN_SWAP_DESC_BASE[i] = tx_desc;
// init fastpath TX descriptor
tx_desc.own = 1;
for ( i = 0; i < FASTPATH_TO_WAN_TX_DESC_NUM; i++ )
FASTPATH_TO_WAN_TX_DESC_BASE[i] = tx_desc;
return 0;
ALLOC_SKB_RX_FAIL:
while ( i-- > 0 )
dev_kfree_skb_any(skb_pool[i]);
return -1;
}
static inline void clear_tables(void)
{
struct sk_buff *skb;
int i, j;
for ( i = 0; i < WAN_RX_DESC_NUM; i++ ) {
skb = get_skb_pointer(WAN_RX_DESC_BASE[i].dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
}
for ( i = 0; i < CPU_TO_WAN_TX_DESC_NUM; i++ ) {
skb = get_skb_pointer(CPU_TO_WAN_TX_DESC_BASE[i].dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
}
for ( j = 0; j < 8; j++ )
for ( i = 0; i < WAN_TX_DESC_NUM; i++ ) {
skb = get_skb_pointer(WAN_TX_DESC_BASE(j)[i].dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
}
for ( i = 0; i < WAN_SWAP_DESC_NUM; i++ ) {
skb = get_skb_pointer(WAN_SWAP_DESC_BASE[i].dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
}
for ( i = 0; i < FASTPATH_TO_WAN_TX_DESC_NUM; i++ ) {
skb = get_skb_pointer(FASTPATH_TO_WAN_TX_DESC_BASE[i].dataptr);
if ( skb != NULL )
dev_kfree_skb_any(skb);
}
}
static int ptm_showtime_enter(struct port_cell_info *port_cell, void *xdata_addr)
{
int i;
ASSERT(port_cell != NULL, "port_cell is NULL");
ASSERT(xdata_addr != NULL, "xdata_addr is NULL");
// TODO: ReTX set xdata_addr
g_xdata_addr = xdata_addr;
g_showtime = 1;
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ )
netif_carrier_on(g_net_dev[i]);
IFX_REG_W32(0x0F, UTP_CFG);
//#ifdef CONFIG_VR9
// IFX_REG_W32_MASK(1 << 17, 0, FFSM_CFG0);
//#endif
printk("enter showtime\n");
return 0;
}
static int ptm_showtime_exit(void)
{
int i;
if ( !g_showtime )
return -1;
//#ifdef CONFIG_VR9
// IFX_REG_W32_MASK(0, 1 << 17, FFSM_CFG0);
//#endif
IFX_REG_W32(0x00, UTP_CFG);
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ )
netif_carrier_off(g_net_dev[i]);
g_showtime = 0;
// TODO: ReTX clean state
g_xdata_addr = NULL;
printk("leave showtime\n");
return 0;
}
static const struct of_device_id ltq_ptm_match[] = {
#ifdef CONFIG_DANUBE
{ .compatible = "lantiq,ppe-danube", .data = NULL },
#elif defined CONFIG_AMAZON_SE
{ .compatible = "lantiq,ppe-ase", .data = NULL },
#elif defined CONFIG_AR9
{ .compatible = "lantiq,ppe-arx100", .data = NULL },
#elif defined CONFIG_VR9
{ .compatible = "lantiq,ppe-xrx200", .data = NULL },
#endif
{},
};
MODULE_DEVICE_TABLE(of, ltq_ptm_match);
static int ltq_ptm_probe(struct platform_device *pdev)
{
int ret;
int i;
char ver_str[256];
struct port_cell_info port_cell = {0};
ret = init_priv_data();
if ( ret != 0 ) {
err("INIT_PRIV_DATA_FAIL");
goto INIT_PRIV_DATA_FAIL;
}
ifx_ptm_init_chip(pdev);
ret = init_tables();
if ( ret != 0 ) {
err("INIT_TABLES_FAIL");
goto INIT_TABLES_FAIL;
}
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ ) {
g_net_dev[i] = alloc_netdev(0, g_net_dev_name[i], NET_NAME_UNKNOWN, ether_setup);
if ( g_net_dev[i] == NULL )
goto ALLOC_NETDEV_FAIL;
ptm_setup(g_net_dev[i], i);
}
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ ) {
ret = register_netdev(g_net_dev[i]);
if ( ret != 0 )
goto REGISTER_NETDEV_FAIL;
}
/* register interrupt handler */
ret = request_irq(PPE_MAILBOX_IGU1_INT, mailbox_irq_handler, 0, "ptm_mailbox_isr", &g_ptm_priv_data);
if ( ret ) {
if ( ret == -EBUSY ) {
err("IRQ may be occupied by other driver, please reconfig to disable it.");
}
else {
err("request_irq fail");
}
goto REQUEST_IRQ_PPE_MAILBOX_IGU1_INT_FAIL;
}
disable_irq(PPE_MAILBOX_IGU1_INT);
ret = ifx_pp32_start(0);
if ( ret ) {
err("ifx_pp32_start fail!");
goto PP32_START_FAIL;
}
IFX_REG_W32(1 << 16, MBOX_IGU1_IER); // enable SWAP interrupt
IFX_REG_W32(~0, MBOX_IGU1_ISRC);
enable_irq(PPE_MAILBOX_IGU1_INT);
ifx_mei_atm_showtime_check(&g_showtime, &port_cell, &g_xdata_addr);
if ( g_showtime ) {
ptm_showtime_enter(&port_cell, &g_xdata_addr);
}
ifx_mei_atm_showtime_enter = ptm_showtime_enter;
ifx_mei_atm_showtime_exit = ptm_showtime_exit;
ifx_ptm_version(ver_str);
printk(KERN_INFO "%s", ver_str);
printk("ifxmips_ptm: PTM init succeed\n");
return 0;
PP32_START_FAIL:
free_irq(PPE_MAILBOX_IGU1_INT, &g_ptm_priv_data);
REQUEST_IRQ_PPE_MAILBOX_IGU1_INT_FAIL:
i = ARRAY_SIZE(g_net_dev);
REGISTER_NETDEV_FAIL:
while ( i-- )
unregister_netdev(g_net_dev[i]);
i = ARRAY_SIZE(g_net_dev);
ALLOC_NETDEV_FAIL:
while ( i-- ) {
free_netdev(g_net_dev[i]);
g_net_dev[i] = NULL;
}
INIT_TABLES_FAIL:
INIT_PRIV_DATA_FAIL:
clear_priv_data();
printk("ifxmips_ptm: PTM init failed\n");
return ret;
}
static int ltq_ptm_remove(struct platform_device *pdev)
{
int i;
ifx_mei_atm_showtime_enter = NULL;
ifx_mei_atm_showtime_exit = NULL;
ifx_pp32_stop(0);
free_irq(PPE_MAILBOX_IGU1_INT, &g_ptm_priv_data);
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ )
unregister_netdev(g_net_dev[i]);
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ ) {
free_netdev(g_net_dev[i]);
g_net_dev[i] = NULL;
}
clear_tables();
ifx_ptm_uninit_chip();
clear_priv_data();
return 0;
}
#ifndef MODULE
static int __init wanqos_en_setup(char *line)
{
wanqos_en = simple_strtoul(line, NULL, 0);
if ( wanqos_en < 1 || wanqos_en > 8 )
wanqos_en = 0;
return 0;
}
static int __init queue_gamma_map_setup(char *line)
{
char *p;
int i;
for ( i = 0, p = line; i < ARRAY_SIZE(queue_gamma_map) && isxdigit(*p); i++ )
{
queue_gamma_map[i] = simple_strtoul(p, &p, 0);
if ( *p == ',' || *p == ';' || *p == ':' )
p++;
}
return 0;
}
#endif
static struct platform_driver ltq_ptm_driver = {
.probe = ltq_ptm_probe,
.remove = ltq_ptm_remove,
.driver = {
.name = "ptm",
.owner = THIS_MODULE,
.of_match_table = ltq_ptm_match,
},
};
module_platform_driver(ltq_ptm_driver);
#ifndef MODULE
__setup("wanqos_en=", wanqos_en_setup);
__setup("queue_gamma_map=", queue_gamma_map_setup);
#endif
MODULE_LICENSE("GPL");
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