OpenWrt – Rev 1
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/******************************************************************************
**
** FILE NAME : ifxmips_ptm_adsl.c
** PROJECT : UEIP
** MODULES : PTM
**
** DATE : 7 Jul 2009
** AUTHOR : Xu Liang
** DESCRIPTION : PTM driver common source file (core functions for Danube/
** Amazon-SE/AR9)
** 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
*******************************************************************************/
/*
* ####################################
* Head File
* ####################################
*/
/*
* Common Head File
*/
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.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 <asm/io.h>
/*
* Chip Specific Head File
*/
#include "ifxmips_ptm_adsl.h"
#include <lantiq_soc.h>
/*
* ####################################
* Kernel Version Adaption
* ####################################
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11)
#define MODULE_PARM_ARRAY(a, b) module_param_array(a, int, NULL, 0)
#define MODULE_PARM(a, b) module_param(a, int, 0)
#else
#define MODULE_PARM_ARRAY(a, b) MODULE_PARM(a, b)
#endif
/*
* ####################################
* Parameters to Configure PPE
* ####################################
*/
static int write_desc_delay = 0x20; /* Write descriptor delay */
static int rx_max_packet_size = ETH_MAX_FRAME_LENGTH;
/* Max packet size for RX */
static int dma_rx_descriptor_length = 24; /* Number of descriptors per DMA RX channel */
static int dma_tx_descriptor_length = 24; /* Number of descriptors per DMA TX channel */
static int eth_efmtc_crc_cfg = 0x03100710; /* default: tx_eth_crc_check: 1, tx_tc_crc_check: 1, tx_tc_crc_len = 16 */
/* rx_eth_crc_present: 1, rx_eth_crc_check: 1, rx_tc_crc_check: 1, rx_tc_crc_len = 16 */
MODULE_PARM(write_desc_delay, "i");
MODULE_PARM_DESC(write_desc_delay, "PPE core clock cycles between descriptor write and effectiveness in external RAM");
MODULE_PARM(rx_max_packet_size, "i");
MODULE_PARM_DESC(rx_max_packet_size, "Max packet size in byte for downstream ethernet frames");
MODULE_PARM(dma_rx_descriptor_length, "i");
MODULE_PARM_DESC(dma_rx_descriptor_length, "Number of descriptor assigned to DMA RX channel (>16)");
MODULE_PARM(dma_tx_descriptor_length, "i");
MODULE_PARM_DESC(dma_tx_descriptor_length, "Number of descriptor assigned to DMA TX channel (>16)");
MODULE_PARM(eth_efmtc_crc_cfg, "i");
MODULE_PARM_DESC(eth_efmtc_crc_cfg, "Configuration for PTM TX/RX ethernet/efm-tc CRC");
/*
* ####################################
* Definition
* ####################################
*/
#define DUMP_SKB_LEN ~0
/*
* ####################################
* Declaration
* ####################################
*/
/*
* Network Operations
*/
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 *);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,10,0))
static int ptm_change_mtu(struct net_device *, int);
#endif
static int ptm_ioctl(struct net_device *, struct ifreq *, int);
static void ptm_tx_timeout(struct net_device *);
/*
* DSL Data LED
*/
static INLINE void adsl_led_flash(void);
/*
* buffer manage functions
*/
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_rx_pointer(unsigned int);
static INLINE int get_tx_desc(unsigned int, unsigned int *);
/*
* Mailbox handler and signal function
*/
static INLINE int mailbox_rx_irq_handler(unsigned int);
static irqreturn_t mailbox_irq_handler(int, void *);
static INLINE void mailbox_signal(unsigned int, int);
#ifdef CONFIG_IFX_PTM_RX_TASKLET
static void do_ptm_tasklet(unsigned long);
#endif
/*
* Debug Functions
*/
#if defined(DEBUG_DUMP_SKB) && DEBUG_DUMP_SKB
static void dump_skb(struct sk_buff *, u32, char *, int, int, int);
#else
#define dump_skb(skb, len, title, port, ch, is_tx) do {} while (0)
#endif
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static void skb_swap(struct sk_buff *);
#else
#define skb_swap(skb) do {} while (0)
#endif
/*
* Proc File Functions
*/
static INLINE void proc_file_create(void);
static INLINE void proc_file_delete(void);
static int proc_read_version(char *, char **, off_t, int, int *, void *);
static int proc_read_wanmib(char *, char **, off_t, int, int *, void *);
static int proc_write_wanmib(struct file *, const char *, unsigned long, void *);
#if defined(ENABLE_FW_PROC) && ENABLE_FW_PROC
static int proc_read_genconf(char *, char **, off_t, int, int *, void *);
#endif
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static int proc_read_dbg(char *, char **, off_t, int, int *, void *);
static int proc_write_dbg(struct file *, const char *, unsigned long, void *);
#endif
/*
* Proc Help Functions
*/
static INLINE int stricmp(const char *, const char *);
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static INLINE int strincmp(const char *, const char *, int);
#endif
static INLINE int ifx_ptm_version(char *);
/*
* Init & clean-up functions
*/
static INLINE void check_parameters(void);
static INLINE int init_priv_data(void);
static INLINE void clear_priv_data(void);
static INLINE void init_tables(void);
/*
* Exteranl Function
*/
#if defined(CONFIG_IFXMIPS_DSL_CPE_MEI) || defined(CONFIG_IFXMIPS_DSL_CPE_MEI_MODULE)
extern int ifx_mei_atm_showtime_check(int *is_showtime, struct port_cell_info *port_cell, void **xdata_addr);
#else
static inline int ifx_mei_atm_showtime_check(int *is_showtime, struct port_cell_info *port_cell, void **xdata_addr)
{
if ( is_showtime != NULL )
*is_showtime = 0;
return 0;
}
#endif
/*
* External variable
*/
#if defined(CONFIG_IFXMIPS_DSL_CPE_MEI) || defined(CONFIG_IFXMIPS_DSL_CPE_MEI_MODULE)
extern int (*ifx_mei_atm_showtime_enter)(struct port_cell_info *, void *);
extern int (*ifx_mei_atm_showtime_exit)(void);
#else
int (*ifx_mei_atm_showtime_enter)(struct port_cell_info *, void *) = NULL;
EXPORT_SYMBOL(ifx_mei_atm_showtime_enter);
int (*ifx_mei_atm_showtime_exit)(void) = NULL;
EXPORT_SYMBOL(ifx_mei_atm_showtime_exit);
#endif
/*
* ####################################
* Local Variable
* ####################################
*/
static struct ptm_priv_data g_ptm_priv_data;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
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,
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,10,0))
.ndo_change_mtu = ptm_change_mtu,
#endif
.ndo_do_ioctl = ptm_ioctl,
.ndo_tx_timeout = ptm_tx_timeout,
};
#endif
static struct net_device *g_net_dev[2] = {0};
static char *g_net_dev_name[2] = {"dsl0", "dslfast0"};
#ifdef CONFIG_IFX_PTM_RX_TASKLET
static struct tasklet_struct g_ptm_tasklet[] = {
{NULL, 0, ATOMIC_INIT(0), do_ptm_tasklet, 0},
{NULL, 0, ATOMIC_INIT(0), do_ptm_tasklet, 1},
};
#endif
unsigned int ifx_ptm_dbg_enable = DBG_ENABLE_MASK_ERR;
static struct proc_dir_entry* g_ptm_dir = NULL;
static int g_showtime = 0;
/*
* ####################################
* Local Function
* ####################################
*/
static void ptm_setup(struct net_device *dev, int ndev)
{
#if defined(CONFIG_IFXMIPS_DSL_CPE_MEI) || defined(CONFIG_IFXMIPS_DSL_CPE_MEI_MODULE)
netif_carrier_off(dev);
#endif
/* hook network operations */
dev->netdev_ops = &g_ptm_netdev_ops;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))
/* Allow up to 1508 bytes, for RFC4638 */
dev->max_mtu = ETH_DATA_LEN + 8;
#endif
netif_napi_add(dev, &g_ptm_priv_data.itf[ndev].napi, ptm_napi_poll, 25);
dev->watchdog_timeo = ETH_WATCHDOG_TIMEOUT;
dev->dev_addr[0] = 0x00;
dev->dev_addr[1] = 0x20;
dev->dev_addr[2] = 0xda;
dev->dev_addr[3] = 0x86;
dev->dev_addr[4] = 0x23;
dev->dev_addr[5] = 0x75 + ndev;
}
static struct net_device_stats *ptm_get_stats(struct net_device *dev)
{
int ndev;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
g_ptm_priv_data.itf[ndev].stats.rx_errors = WAN_MIB_TABLE[ndev].wrx_tccrc_err_pdu + WAN_MIB_TABLE[ndev].wrx_ethcrc_err_pdu;
g_ptm_priv_data.itf[ndev].stats.rx_dropped = WAN_MIB_TABLE[ndev].wrx_nodesc_drop_pdu + WAN_MIB_TABLE[ndev].wrx_len_violation_drop_pdu + (WAN_MIB_TABLE[ndev].wrx_correct_pdu - g_ptm_priv_data.itf[ndev].stats.rx_packets);
return &g_ptm_priv_data.itf[ndev].stats;
}
static int ptm_open(struct net_device *dev)
{
int ndev;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
napi_enable(&g_ptm_priv_data.itf[ndev].napi);
IFX_REG_W32_MASK(0, 1 << ndev, MBOX_IGU1_IER);
netif_start_queue(dev);
return 0;
}
static int ptm_stop(struct net_device *dev)
{
int ndev;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
IFX_REG_W32_MASK((1 << ndev) | (1 << (ndev + 16)), 0, MBOX_IGU1_IER);
napi_disable(&g_ptm_priv_data.itf[ndev].napi);
netif_stop_queue(dev);
return 0;
}
static unsigned int ptm_poll(int ndev, unsigned int work_to_do)
{
unsigned int work_done = 0;
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
while ( work_done < work_to_do && WRX_DMA_CHANNEL_CONFIG(ndev)->vlddes > 0 ) {
if ( mailbox_rx_irq_handler(ndev) < 0 )
break;
work_done++;
}
return work_done;
}
static int ptm_napi_poll(struct napi_struct *napi, int budget)
{
int ndev;
unsigned int work_done;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != napi->dev; ndev++ );
work_done = ptm_poll(ndev, budget);
// interface down
if ( !netif_running(napi->dev) ) {
napi_complete(napi);
return work_done;
}
// no more traffic
if ( WRX_DMA_CHANNEL_CONFIG(ndev)->vlddes == 0 ) {
// clear interrupt
IFX_REG_W32_MASK(0, 1 << ndev, MBOX_IGU1_ISRC);
// double check
if ( WRX_DMA_CHANNEL_CONFIG(ndev)->vlddes == 0 ) {
napi_complete(napi);
IFX_REG_W32_MASK(0, 1 << ndev, 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)
{
int ndev;
unsigned int f_full;
int desc_base;
register struct tx_descriptor reg_desc = {0};
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
if ( !g_showtime ) {
err("not in showtime");
goto PTM_HARD_START_XMIT_FAIL;
}
/* allocate descriptor */
desc_base = get_tx_desc(ndev, &f_full);
if ( f_full ) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,7,0)
netif_trans_update(dev);
#else
dev->trans_start = jiffies;
#endif
netif_stop_queue(dev);
IFX_REG_W32_MASK(0, 1 << (ndev + 16), MBOX_IGU1_ISRC);
IFX_REG_W32_MASK(0, 1 << (ndev + 16), MBOX_IGU1_IER);
}
if ( desc_base < 0 )
goto PTM_HARD_START_XMIT_FAIL;
if ( g_ptm_priv_data.itf[ndev].tx_skb[desc_base] != NULL )
dev_kfree_skb_any(g_ptm_priv_data.itf[ndev].tx_skb[desc_base]);
g_ptm_priv_data.itf[ndev].tx_skb[desc_base] = skb;
reg_desc.dataptr = (unsigned int)skb->data >> 2;
reg_desc.datalen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
reg_desc.byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1);
reg_desc.own = 1;
reg_desc.c = 1;
reg_desc.sop = reg_desc.eop = 1;
/* write discriptor to memory and write back cache */
g_ptm_priv_data.itf[ndev].tx_desc[desc_base] = reg_desc;
dma_cache_wback((unsigned long)skb->data, skb->len);
wmb();
dump_skb(skb, DUMP_SKB_LEN, (char *)__func__, ndev, ndev, 1);
if ( (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_MAC_SWAP) ) {
skb_swap(skb);
}
g_ptm_priv_data.itf[ndev].stats.tx_packets++;
g_ptm_priv_data.itf[ndev].stats.tx_bytes += reg_desc.datalen;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,7,0)
netif_trans_update(dev);
#else
dev->trans_start = jiffies;
#endif
mailbox_signal(ndev, 1);
adsl_led_flash();
return NETDEV_TX_OK;
PTM_HARD_START_XMIT_FAIL:
dev_kfree_skb_any(skb);
g_ptm_priv_data.itf[ndev].stats.tx_dropped++;
return NETDEV_TX_OK;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,10,0))
static int ptm_change_mtu(struct net_device *dev, int mtu)
{
/* Allow up to 1508 bytes, for RFC4638 */
if (mtu < 68 || mtu > ETH_DATA_LEN + 8)
return -EINVAL;
dev->mtu = mtu;
return 0;
}
#endif
static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int ndev;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
switch ( cmd )
{
case IFX_PTM_MIB_CW_GET:
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxNoIdleCodewords = WAN_MIB_TABLE[ndev].wrx_nonidle_cw;
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxIdleCodewords = WAN_MIB_TABLE[ndev].wrx_idle_cw;
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifRxCodingViolation = WAN_MIB_TABLE[ndev].wrx_err_cw;
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifTxNoIdleCodewords = 0;
((PTM_CW_IF_ENTRY_T *)ifr->ifr_data)->ifTxIdleCodewords = 0;
break;
case IFX_PTM_MIB_FRAME_GET:
((PTM_FRAME_MIB_T *)ifr->ifr_data)->RxCorrect = WAN_MIB_TABLE[ndev].wrx_correct_pdu;
((PTM_FRAME_MIB_T *)ifr->ifr_data)->TC_CrcError = WAN_MIB_TABLE[ndev].wrx_tccrc_err_pdu;
((PTM_FRAME_MIB_T *)ifr->ifr_data)->RxDropped = WAN_MIB_TABLE[ndev].wrx_nodesc_drop_pdu + WAN_MIB_TABLE[ndev].wrx_len_violation_drop_pdu;
((PTM_FRAME_MIB_T *)ifr->ifr_data)->TxSend = WAN_MIB_TABLE[ndev].wtx_total_pdu;
break;
case IFX_PTM_CFG_GET:
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcPresent = CFG_ETH_EFMTC_CRC->rx_eth_crc_present;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcCheck = CFG_ETH_EFMTC_CRC->rx_eth_crc_check;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcCheck = CFG_ETH_EFMTC_CRC->rx_tc_crc_check;
((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen = CFG_ETH_EFMTC_CRC->rx_tc_crc_len;
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxEthCrcGen = CFG_ETH_EFMTC_CRC->tx_eth_crc_gen;
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcGen = CFG_ETH_EFMTC_CRC->tx_tc_crc_gen;
((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen = CFG_ETH_EFMTC_CRC->tx_tc_crc_len;
break;
case IFX_PTM_CFG_SET:
CFG_ETH_EFMTC_CRC->rx_eth_crc_present = ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcPresent ? 1 : 0;
CFG_ETH_EFMTC_CRC->rx_eth_crc_check = ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxEthCrcCheck ? 1 : 0;
if ( ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcCheck && (((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen == 16 || ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen == 32) )
{
CFG_ETH_EFMTC_CRC->rx_tc_crc_check = 1;
CFG_ETH_EFMTC_CRC->rx_tc_crc_len = ((IFX_PTM_CFG_T *)ifr->ifr_data)->RxTcCrcLen;
}
else
{
CFG_ETH_EFMTC_CRC->rx_tc_crc_check = 0;
CFG_ETH_EFMTC_CRC->rx_tc_crc_len = 0;
}
CFG_ETH_EFMTC_CRC->tx_eth_crc_gen = ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxEthCrcGen ? 1 : 0;
if ( ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcGen && (((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen == 16 || ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen == 32) )
{
CFG_ETH_EFMTC_CRC->tx_tc_crc_gen = 1;
CFG_ETH_EFMTC_CRC->tx_tc_crc_len = ((IFX_PTM_CFG_T *)ifr->ifr_data)->TxTcCrcLen;
}
else
{
CFG_ETH_EFMTC_CRC->tx_tc_crc_gen = 0;
CFG_ETH_EFMTC_CRC->tx_tc_crc_len = 0;
}
break;
default:
return -EOPNOTSUPP;
}
return 0;
}
static void ptm_tx_timeout(struct net_device *dev)
{
int ndev;
for ( ndev = 0; ndev < ARRAY_SIZE(g_net_dev) && g_net_dev[ndev] != dev; ndev++ );
ASSERT(ndev >= 0 && ndev < ARRAY_SIZE(g_net_dev), "ndev = %d (wrong value)", ndev);
/* disable TX irq, release skb when sending new packet */
IFX_REG_W32_MASK(1 << (ndev + 16), 0, MBOX_IGU1_IER);
/* wake up TX queue */
netif_wake_queue(dev);
return;
}
static INLINE void adsl_led_flash(void)
{
}
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_packet_size + RX_HEAD_MAC_ADDR_ALIGNMENT + 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;
}
#if 0
static INLINE struct sk_buff* alloc_skb_tx(unsigned int size)
{
struct sk_buff *skb;
/* allocate memory including padding */
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;
}
#endif
static INLINE struct sk_buff *get_skb_rx_pointer(unsigned int dataptr)
{
unsigned int skb_dataptr;
struct sk_buff *skb;
skb_dataptr = ((dataptr - 1) << 2) | 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 | KSEG1) == ((dataptr << 2) | 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[itf];
// assume TX is serial operation
// no protection provided
*f_full = 1;
if ( p_itf->tx_desc[p_itf->tx_desc_pos].own == 0 ) {
desc_base = p_itf->tx_desc_pos;
if ( ++(p_itf->tx_desc_pos) == dma_tx_descriptor_length )
p_itf->tx_desc_pos = 0;
if ( p_itf->tx_desc[p_itf->tx_desc_pos].own == 0 )
*f_full = 0;
}
return desc_base;
}
static INLINE int mailbox_rx_irq_handler(unsigned int ch) // return: < 0 - descriptor not available, 0 - received one packet
{
unsigned int ndev = ch;
struct sk_buff *skb;
struct sk_buff *new_skb;
volatile struct rx_descriptor *desc;
struct rx_descriptor reg_desc;
int netif_rx_ret;
desc = &g_ptm_priv_data.itf[ndev].rx_desc[g_ptm_priv_data.itf[ndev].rx_desc_pos];
if ( desc->own || !desc->c ) // if PP32 hold descriptor or descriptor not completed
return -EAGAIN;
if ( ++g_ptm_priv_data.itf[ndev].rx_desc_pos == dma_rx_descriptor_length )
g_ptm_priv_data.itf[ndev].rx_desc_pos = 0;
reg_desc = *desc;
skb = get_skb_rx_pointer(reg_desc.dataptr);
if ( !reg_desc.err ) {
new_skb = alloc_skb_rx();
if ( new_skb != NULL ) {
skb_reserve(skb, reg_desc.byteoff);
skb_put(skb, reg_desc.datalen);
dump_skb(skb, DUMP_SKB_LEN, (char *)__func__, ndev, ndev, 0);
// parse protocol header
skb->dev = g_net_dev[ndev];
skb->protocol = eth_type_trans(skb, skb->dev);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,11,0))
g_net_dev[ndev]->last_rx = jiffies;
#endif
netif_rx_ret = netif_receive_skb(skb);
if ( netif_rx_ret != NET_RX_DROP ) {
g_ptm_priv_data.itf[ndev].stats.rx_packets++;
g_ptm_priv_data.itf[ndev].stats.rx_bytes += reg_desc.datalen;
}
reg_desc.dataptr = ((unsigned int)new_skb->data >> 2) & 0x0FFFFFFF;
reg_desc.byteoff = RX_HEAD_MAC_ADDR_ALIGNMENT;
}
}
else
reg_desc.err = 0;
reg_desc.datalen = rx_max_packet_size;
reg_desc.own = 1;
reg_desc.c = 0;
// update descriptor
*desc = reg_desc;
wmb();
mailbox_signal(ndev, 0);
adsl_led_flash();
return 0;
}
static irqreturn_t mailbox_irq_handler(int irq, void *dev_id)
{
unsigned int isr;
int i;
isr = IFX_REG_R32(MBOX_IGU1_ISR);
IFX_REG_W32(isr, MBOX_IGU1_ISRC);
isr &= IFX_REG_R32(MBOX_IGU1_IER);
while ( (i = __fls(isr)) >= 0 ) {
isr ^= 1 << i;
if ( i >= 16 ) {
// TX
IFX_REG_W32_MASK(1 << i, 0, MBOX_IGU1_IER);
i -= 16;
if ( i < MAX_ITF_NUMBER )
netif_wake_queue(g_net_dev[i]);
}
else {
// RX
#ifdef CONFIG_IFX_PTM_RX_INTERRUPT
while ( WRX_DMA_CHANNEL_CONFIG(i)->vlddes > 0 )
mailbox_rx_irq_handler(i);
#else
IFX_REG_W32_MASK(1 << i, 0, MBOX_IGU1_IER);
napi_schedule(&g_ptm_priv_data.itf[i].napi);
#endif
}
}
return IRQ_HANDLED;
}
static INLINE void mailbox_signal(unsigned int itf, int is_tx)
{
int count = 1000;
if ( is_tx ) {
while ( MBOX_IGU3_ISR_ISR(itf + 16) && count > 0 )
count--;
IFX_REG_W32(MBOX_IGU3_ISRS_SET(itf + 16), MBOX_IGU3_ISRS);
}
else {
while ( MBOX_IGU3_ISR_ISR(itf) && count > 0 )
count--;
IFX_REG_W32(MBOX_IGU3_ISRS_SET(itf), MBOX_IGU3_ISRS);
}
ASSERT(count != 0, "MBOX_IGU3_ISR = 0x%08x", IFX_REG_R32(MBOX_IGU3_ISR));
}
#ifdef CONFIG_IFX_PTM_RX_TASKLET
static void do_ptm_tasklet(unsigned long arg)
{
unsigned int work_to_do = 25;
unsigned int work_done = 0;
ASSERT(arg >= 0 && arg < ARRAY_SIZE(g_net_dev), "arg = %lu (wrong value)", arg);
while ( work_done < work_to_do && WRX_DMA_CHANNEL_CONFIG(arg)->vlddes > 0 ) {
if ( mailbox_rx_irq_handler(arg) < 0 )
break;
work_done++;
}
// interface down
if ( !netif_running(g_net_dev[arg]) )
return;
// no more traffic
if ( WRX_DMA_CHANNEL_CONFIG(arg)->vlddes == 0 ) {
// clear interrupt
IFX_REG_W32_MASK(0, 1 << arg, MBOX_IGU1_ISRC);
// double check
if ( WRX_DMA_CHANNEL_CONFIG(arg)->vlddes == 0 ) {
IFX_REG_W32_MASK(0, 1 << arg, MBOX_IGU1_IER);
return;
}
}
// next round
tasklet_schedule(&g_ptm_tasklet[arg]);
}
#endif
#if defined(DEBUG_DUMP_SKB) && DEBUG_DUMP_SKB
static void dump_skb(struct sk_buff *skb, u32 len, char *title, int port, int ch, int is_tx)
{
int i;
if ( !(ifx_ptm_dbg_enable & (is_tx ? DBG_ENABLE_MASK_DUMP_SKB_TX : DBG_ENABLE_MASK_DUMP_SKB_RX)) )
return;
if ( skb->len < len )
len = skb->len;
if ( len > rx_max_packet_size ) {
printk("too big data length: skb = %08x, skb->data = %08x, skb->len = %d\n", (u32)skb, (u32)skb->data, skb->len);
return;
}
if ( ch >= 0 )
printk("%s (port %d, ch %d)\n", title, port, ch);
else
printk("%s\n", title);
printk(" skb->data = %08X, skb->tail = %08X, skb->len = %d\n", (u32)skb->data, (u32)skb->tail, (int)skb->len);
for ( i = 1; i <= len; i++ ) {
if ( i % 16 == 1 )
printk(" %4d:", i - 1);
printk(" %02X", (int)(*((char*)skb->data + i - 1) & 0xFF));
if ( i % 16 == 0 )
printk("\n");
}
if ( (i - 1) % 16 != 0 )
printk("\n");
}
#endif
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static void skb_swap(struct sk_buff *skb)
{
unsigned char tmp[8];
unsigned char *p = skb->data;
if ( !(p[0] & 0x01) ) { // bypass broadcast/multicast
// swap MAC
memcpy(tmp, p, 6);
memcpy(p, p + 6, 6);
memcpy(p + 6, tmp, 6);
p += 12;
// bypass VLAN
while ( p[0] == 0x81 && p[1] == 0x00 )
p += 4;
// IP
if ( p[0] == 0x08 && p[1] == 0x00 ) {
p += 14;
memcpy(tmp, p, 4);
memcpy(p, p + 4, 4);
memcpy(p + 4, tmp, 4);
p += 8;
}
dma_cache_wback((unsigned long)skb->data, (unsigned long)p - (unsigned long)skb->data);
}
}
#endif
static INLINE void proc_file_create(void)
{
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
struct proc_dir_entry *res;
g_ptm_dir = proc_mkdir("driver/ifx_ptm", NULL);
create_proc_read_entry("version",
0,
g_ptm_dir,
proc_read_version,
NULL);
res = create_proc_entry("wanmib",
0,
g_ptm_dir);
if ( res != NULL ) {
res->read_proc = proc_read_wanmib;
res->write_proc = proc_write_wanmib;
}
#if defined(ENABLE_FW_PROC) && ENABLE_FW_PROC
create_proc_read_entry("genconf",
0,
g_ptm_dir,
proc_read_genconf,
NULL);
#ifdef CONFIG_AR9
create_proc_read_entry("regs",
0,
g_ptm_dir,
ifx_ptm_proc_read_regs,
NULL);
#endif
#endif
res = create_proc_entry("dbg",
0,
g_ptm_dir);
if ( res != NULL ) {
res->read_proc = proc_read_dbg;
res->write_proc = proc_write_dbg;
}
#endif
}
static INLINE void proc_file_delete(void)
{
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
remove_proc_entry("dbg", g_ptm_dir);
#endif
#if defined(ENABLE_FW_PROC) && ENABLE_FW_PROC
#ifdef CONFIG_AR9
remove_proc_entry("regs", g_ptm_dir);
#endif
remove_proc_entry("genconf", g_ptm_dir);
#endif
remove_proc_entry("wanmib", g_ptm_dir);
remove_proc_entry("version", g_ptm_dir);
remove_proc_entry("driver/ifx_ptm", NULL);
}
static int proc_read_version(char *buf, char **start, off_t offset, int count, int *eof, void *data)
{
int len = 0;
len += ifx_ptm_version(buf + len);
if ( offset >= len ) {
*start = buf;
*eof = 1;
return 0;
}
*start = buf + offset;
if ( (len -= offset) > count )
return count;
*eof = 1;
return len;
}
static int proc_read_wanmib(char *page, char **start, off_t off, int count, int *eof, void *data)
{
int len = 0;
int i;
char *title[] = {
"dsl0\n",
"dslfast0\n"
};
for ( i = 0; i < ARRAY_SIZE(title); i++ ) {
len += sprintf(page + off + len, title[i]);
len += sprintf(page + off + len, " wrx_correct_pdu = %d\n", WAN_MIB_TABLE[i].wrx_correct_pdu);
len += sprintf(page + off + len, " wrx_correct_pdu_bytes = %d\n", WAN_MIB_TABLE[i].wrx_correct_pdu_bytes);
len += sprintf(page + off + len, " wrx_tccrc_err_pdu = %d\n", WAN_MIB_TABLE[i].wrx_tccrc_err_pdu);
len += sprintf(page + off + len, " wrx_tccrc_err_pdu_bytes = %d\n", WAN_MIB_TABLE[i].wrx_tccrc_err_pdu_bytes);
len += sprintf(page + off + len, " wrx_ethcrc_err_pdu = %d\n", WAN_MIB_TABLE[i].wrx_ethcrc_err_pdu);
len += sprintf(page + off + len, " wrx_ethcrc_err_pdu_bytes = %d\n", WAN_MIB_TABLE[i].wrx_ethcrc_err_pdu_bytes);
len += sprintf(page + off + len, " wrx_nodesc_drop_pdu = %d\n", WAN_MIB_TABLE[i].wrx_nodesc_drop_pdu);
len += sprintf(page + off + len, " wrx_len_violation_drop_pdu = %d\n", WAN_MIB_TABLE[i].wrx_len_violation_drop_pdu);
len += sprintf(page + off + len, " wrx_idle_bytes = %d\n", WAN_MIB_TABLE[i].wrx_idle_bytes);
len += sprintf(page + off + len, " wrx_nonidle_cw = %d\n", WAN_MIB_TABLE[i].wrx_nonidle_cw);
len += sprintf(page + off + len, " wrx_idle_cw = %d\n", WAN_MIB_TABLE[i].wrx_idle_cw);
len += sprintf(page + off + len, " wrx_err_cw = %d\n", WAN_MIB_TABLE[i].wrx_err_cw);
len += sprintf(page + off + len, " wtx_total_pdu = %d\n", WAN_MIB_TABLE[i].wtx_total_pdu);
len += sprintf(page + off + len, " wtx_total_bytes = %d\n", WAN_MIB_TABLE[i].wtx_total_bytes);
}
*eof = 1;
return len;
}
static int proc_write_wanmib(struct file *file, const char *buf, unsigned long count, void *data)
{
char str[2048];
char *p;
int len, rlen;
int i;
len = count < sizeof(str) ? count : sizeof(str) - 1;
rlen = len - copy_from_user(str, buf, len);
while ( rlen && str[rlen - 1] <= ' ' )
rlen--;
str[rlen] = 0;
for ( p = str; *p && *p <= ' '; p++, rlen-- );
if ( !*p )
return count;
if ( stricmp(p, "clear") == 0 || stricmp(p, "clean") == 0 ) {
for ( i = 0; i < 2; i++ )
memset((void*)&WAN_MIB_TABLE[i], 0, sizeof(WAN_MIB_TABLE[i]));
}
return count;
}
#if defined(ENABLE_FW_PROC) && ENABLE_FW_PROC
static int proc_read_genconf(char *page, char **start, off_t off, int count, int *eof, void *data)
{
int len = 0;
int len_max = off + count;
char *pstr;
char str[2048];
int llen = 0;
int i;
unsigned long bit;
pstr = *start = page;
__sync();
llen += sprintf(str + llen, "CFG_WAN_WRDES_DELAY (0x%08X): %d\n", (unsigned int)CFG_WAN_WRDES_DELAY, IFX_REG_R32(CFG_WAN_WRDES_DELAY));
llen += sprintf(str + llen, "CFG_WRX_DMACH_ON (0x%08X):", (unsigned int)CFG_WRX_DMACH_ON);
for ( i = 0, bit = 1; i < MAX_RX_DMA_CHANNEL_NUMBER; i++, bit <<= 1 )
llen += sprintf(str + llen, " %d - %s", i, (IFX_REG_R32(CFG_WRX_DMACH_ON) & bit) ? "on " : "off");
llen += sprintf(str + llen, "\n");
llen += sprintf(str + llen, "CFG_WTX_DMACH_ON (0x%08X):", (unsigned int)CFG_WTX_DMACH_ON);
for ( i = 0, bit = 1; i < MAX_TX_DMA_CHANNEL_NUMBER; i++, bit <<= 1 )
llen += sprintf(str + llen, " %d - %s", i, (IFX_REG_R32(CFG_WTX_DMACH_ON) & bit) ? "on " : "off");
llen += sprintf(str + llen, "\n");
llen += sprintf(str + llen, "CFG_WRX_LOOK_BITTH (0x%08X): %d\n", (unsigned int)CFG_WRX_LOOK_BITTH, IFX_REG_R32(CFG_WRX_LOOK_BITTH));
llen += sprintf(str + llen, "CFG_ETH_EFMTC_CRC (0x%08X): rx_tc_crc_len - %2d, rx_tc_crc_check - %s\n", (unsigned int)CFG_ETH_EFMTC_CRC, CFG_ETH_EFMTC_CRC->rx_tc_crc_len, CFG_ETH_EFMTC_CRC->rx_tc_crc_check ? " on" : "off");
llen += sprintf(str + llen, " rx_eth_crc_check - %s, rx_eth_crc_present - %s\n", CFG_ETH_EFMTC_CRC->rx_eth_crc_check ? " on" : "off", CFG_ETH_EFMTC_CRC->rx_eth_crc_present ? " on" : "off");
llen += sprintf(str + llen, " tx_tc_crc_len - %2d, tx_tc_crc_gen - %s\n", CFG_ETH_EFMTC_CRC->tx_tc_crc_len, CFG_ETH_EFMTC_CRC->tx_tc_crc_gen ? " on" : "off");
llen += sprintf(str + llen, " tx_eth_crc_gen - %s\n", CFG_ETH_EFMTC_CRC->tx_eth_crc_gen ? " on" : "off");
llen += sprintf(str + llen, "RX Port:\n");
for ( i = 0; i < MAX_RX_DMA_CHANNEL_NUMBER; i++ )
llen += sprintf(str + llen, " %d (0x%08X). mfs - %5d, dmach - %d, local_state - %d, partner_state - %d\n", i, (unsigned int)WRX_PORT_CONFIG(i), WRX_PORT_CONFIG(i)->mfs, WRX_PORT_CONFIG(i)->dmach, WRX_PORT_CONFIG(i)->local_state, WRX_PORT_CONFIG(i)->partner_state);
llen += sprintf(str + llen, "RX DMA Channel:\n");
for ( i = 0; i < MAX_RX_DMA_CHANNEL_NUMBER; i++ )
llen += sprintf(str + llen, " %d (0x%08X). desba - 0x%08X (0x%08X), deslen - %d, vlddes - %d\n", i, (unsigned int)WRX_DMA_CHANNEL_CONFIG(i), WRX_DMA_CHANNEL_CONFIG(i)->desba, ((unsigned int)WRX_DMA_CHANNEL_CONFIG(i)->desba << 2) | KSEG1, WRX_DMA_CHANNEL_CONFIG(i)->deslen, WRX_DMA_CHANNEL_CONFIG(i)->vlddes);
llen += sprintf(str + llen, "TX Port:\n");
for ( i = 0; i < MAX_TX_DMA_CHANNEL_NUMBER; i++ )
llen += sprintf(str + llen, " %d (0x%08X). tx_cwth2 - %d, tx_cwth1 - %d\n", i, (unsigned int)WTX_PORT_CONFIG(i), WTX_PORT_CONFIG(i)->tx_cwth2, WTX_PORT_CONFIG(i)->tx_cwth1);
llen += sprintf(str + llen, "TX DMA Channel:\n");
for ( i = 0; i < MAX_TX_DMA_CHANNEL_NUMBER; i++ )
llen += sprintf(str + llen, " %d (0x%08X). desba - 0x%08X (0x%08X), deslen - %d, vlddes - %d\n", i, (unsigned int)WTX_DMA_CHANNEL_CONFIG(i), WTX_DMA_CHANNEL_CONFIG(i)->desba, ((unsigned int)WTX_DMA_CHANNEL_CONFIG(i)->desba << 2) | KSEG1, WTX_DMA_CHANNEL_CONFIG(i)->deslen, WTX_DMA_CHANNEL_CONFIG(i)->vlddes);
if ( len <= off && len + llen > off )
{
memcpy(pstr, str + off - len, len + llen - off);
pstr += len + llen - off;
}
else if ( len > off )
{
memcpy(pstr, str, llen);
pstr += llen;
}
len += llen;
if ( len >= len_max )
goto PROC_READ_GENCONF_OVERRUN_END;
*eof = 1;
return len - off;
PROC_READ_GENCONF_OVERRUN_END:
return len - llen - off;
}
#endif // defined(ENABLE_FW_PROC) && ENABLE_FW_PROC
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static int proc_read_dbg(char *page, char **start, off_t off, int count, int *eof, void *data)
{
int len = 0;
len += sprintf(page + off + len, "error print - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_ERR) ? "enabled" : "disabled");
len += sprintf(page + off + len, "debug print - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_DEBUG_PRINT) ? "enabled" : "disabled");
len += sprintf(page + off + len, "assert - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_ASSERT) ? "enabled" : "disabled");
len += sprintf(page + off + len, "dump rx skb - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_DUMP_SKB_RX) ? "enabled" : "disabled");
len += sprintf(page + off + len, "dump tx skb - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_DUMP_SKB_TX) ? "enabled" : "disabled");
len += sprintf(page + off + len, "mac swap - %s\n", (ifx_ptm_dbg_enable & DBG_ENABLE_MASK_MAC_SWAP) ? "enabled" : "disabled");
*eof = 1;
return len;
}
static int proc_write_dbg(struct file *file, const char *buf, unsigned long count, void *data)
{
static const char *dbg_enable_mask_str[] = {
" error print",
" err",
" debug print",
" dbg",
" assert",
" assert",
" dump rx skb",
" rx",
" dump tx skb",
" tx",
" dump init",
" init",
" dump qos",
" qos",
" mac swap",
" swap",
" all"
};
static const int dbg_enable_mask_str_len[] = {
12, 4,
12, 4,
7, 7,
12, 3,
12, 3,
10, 5,
9, 4,
9, 5,
4
};
unsigned int dbg_enable_mask[] = {
DBG_ENABLE_MASK_ERR,
DBG_ENABLE_MASK_DEBUG_PRINT,
DBG_ENABLE_MASK_ASSERT,
DBG_ENABLE_MASK_DUMP_SKB_RX,
DBG_ENABLE_MASK_DUMP_SKB_TX,
DBG_ENABLE_MASK_DUMP_INIT,
DBG_ENABLE_MASK_DUMP_QOS,
DBG_ENABLE_MASK_MAC_SWAP,
DBG_ENABLE_MASK_ALL
};
char str[2048];
char *p;
int len, rlen;
int f_enable = 0;
int i;
len = count < sizeof(str) ? count : sizeof(str) - 1;
rlen = len - copy_from_user(str, buf, len);
while ( rlen && str[rlen - 1] <= ' ' )
rlen--;
str[rlen] = 0;
for ( p = str; *p && *p <= ' '; p++, rlen-- );
if ( !*p )
return 0;
// debugging feature for enter/leave showtime
if ( strincmp(p, "enter", 5) == 0 && ifx_mei_atm_showtime_enter != NULL )
ifx_mei_atm_showtime_enter(NULL, NULL);
else if ( strincmp(p, "leave", 5) == 0 && ifx_mei_atm_showtime_exit != NULL )
ifx_mei_atm_showtime_exit();
if ( strincmp(p, "enable", 6) == 0 ) {
p += 6;
f_enable = 1;
}
else if ( strincmp(p, "disable", 7) == 0 ) {
p += 7;
f_enable = -1;
}
else if ( strincmp(p, "help", 4) == 0 || *p == '?' ) {
printk("echo <enable/disable> [err/dbg/assert/rx/tx/init/qos/swap/all] > /proc/driver/ifx_ptm/dbg\n");
}
if ( f_enable ) {
if ( *p == 0 ) {
if ( f_enable > 0 )
ifx_ptm_dbg_enable |= DBG_ENABLE_MASK_ALL & ~DBG_ENABLE_MASK_MAC_SWAP;
else
ifx_ptm_dbg_enable &= ~DBG_ENABLE_MASK_ALL | DBG_ENABLE_MASK_MAC_SWAP;
}
else {
do {
for ( i = 0; i < ARRAY_SIZE(dbg_enable_mask_str); i++ )
if ( strincmp(p, dbg_enable_mask_str[i], dbg_enable_mask_str_len[i]) == 0 ) {
if ( f_enable > 0 )
ifx_ptm_dbg_enable |= dbg_enable_mask[i >> 1];
else
ifx_ptm_dbg_enable &= ~dbg_enable_mask[i >> 1];
p += dbg_enable_mask_str_len[i];
break;
}
} while ( i < ARRAY_SIZE(dbg_enable_mask_str) );
}
}
return count;
}
#endif // defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static INLINE int stricmp(const char *p1, const char *p2)
{
int c1, c2;
while ( *p1 && *p2 )
{
c1 = *p1 >= 'A' && *p1 <= 'Z' ? *p1 + 'a' - 'A' : *p1;
c2 = *p2 >= 'A' && *p2 <= 'Z' ? *p2 + 'a' - 'A' : *p2;
if ( (c1 -= c2) )
return c1;
p1++;
p2++;
}
return *p1 - *p2;
}
#if defined(ENABLE_DBG_PROC) && ENABLE_DBG_PROC
static INLINE int strincmp(const char *p1, const char *p2, int n)
{
int c1 = 0, c2;
while ( n && *p1 && *p2 )
{
c1 = *p1 >= 'A' && *p1 <= 'Z' ? *p1 + 'a' - 'A' : *p1;
c2 = *p2 >= 'A' && *p2 <= 'Z' ? *p2 + 'a' - 'A' : *p2;
if ( (c1 -= c2) )
return c1;
p1++;
p2++;
n--;
}
return n ? *p1 - *p2 : c1;
}
#endif
static INLINE int ifx_ptm_version(char *buf)
{
int len = 0;
unsigned int major, minor;
ifx_ptm_get_fw_ver(&major, &minor);
len += sprintf(buf + len, "PTM %d.%d.%d", IFX_PTM_VER_MAJOR, IFX_PTM_VER_MID, IFX_PTM_VER_MINOR);
len += sprintf(buf + len, " PTM (E1) firmware version %d.%d\n", major, minor);
return len;
}
static INLINE void check_parameters(void)
{
/* There is a delay between PPE write descriptor and descriptor is */
/* really stored in memory. Host also has this delay when writing */
/* descriptor. So PPE will use this value to determine if the write */
/* operation makes effect. */
if ( write_desc_delay < 0 )
write_desc_delay = 0;
/* Because of the limitation of length field in descriptors, the packet */
/* size could not be larger than 64K minus overhead size. */
if ( rx_max_packet_size < ETH_MIN_FRAME_LENGTH )
rx_max_packet_size = ETH_MIN_FRAME_LENGTH;
else if ( rx_max_packet_size > 65536 - 1 )
rx_max_packet_size = 65536 - 1;
if ( dma_rx_descriptor_length < 2 )
dma_rx_descriptor_length = 2;
if ( dma_tx_descriptor_length < 2 )
dma_tx_descriptor_length = 2;
}
static INLINE int init_priv_data(void)
{
void *p;
int i;
struct rx_descriptor rx_desc = {0};
struct sk_buff *skb;
volatile struct rx_descriptor *p_rx_desc;
volatile struct tx_descriptor *p_tx_desc;
struct sk_buff **ppskb;
// clear ptm private data structure
memset(&g_ptm_priv_data, 0, sizeof(g_ptm_priv_data));
// allocate memory for RX descriptors
p = kzalloc(MAX_ITF_NUMBER * dma_rx_descriptor_length * sizeof(struct rx_descriptor) + DESC_ALIGNMENT, GFP_KERNEL);
if ( p == NULL )
return -1;
dma_cache_inv((unsigned long)p, MAX_ITF_NUMBER * dma_rx_descriptor_length * sizeof(struct rx_descriptor) + DESC_ALIGNMENT);
g_ptm_priv_data.rx_desc_base = p;
//p = (void *)((((unsigned int)p + DESC_ALIGNMENT - 1) & ~(DESC_ALIGNMENT - 1)) | KSEG1);
// allocate memory for TX descriptors
p = kzalloc(MAX_ITF_NUMBER * dma_tx_descriptor_length * sizeof(struct tx_descriptor) + DESC_ALIGNMENT, GFP_KERNEL);
if ( p == NULL )
return -1;
dma_cache_inv((unsigned long)p, MAX_ITF_NUMBER * dma_tx_descriptor_length * sizeof(struct tx_descriptor) + DESC_ALIGNMENT);
g_ptm_priv_data.tx_desc_base = p;
// allocate memroy for TX skb pointers
p = kzalloc(MAX_ITF_NUMBER * dma_tx_descriptor_length * sizeof(struct sk_buff *) + 4, GFP_KERNEL);
if ( p == NULL )
return -1;
dma_cache_wback_inv((unsigned long)p, MAX_ITF_NUMBER * dma_tx_descriptor_length * sizeof(struct sk_buff *) + 4);
g_ptm_priv_data.tx_skb_base = p;
p_rx_desc = (volatile struct rx_descriptor *)((((unsigned int)g_ptm_priv_data.rx_desc_base + DESC_ALIGNMENT - 1) & ~(DESC_ALIGNMENT - 1)) | KSEG1);
p_tx_desc = (volatile struct tx_descriptor *)((((unsigned int)g_ptm_priv_data.tx_desc_base + DESC_ALIGNMENT - 1) & ~(DESC_ALIGNMENT - 1)) | KSEG1);
ppskb = (struct sk_buff **)(((unsigned int)g_ptm_priv_data.tx_skb_base + 3) & ~3);
for ( i = 0; i < MAX_ITF_NUMBER; i++ ) {
g_ptm_priv_data.itf[i].rx_desc = &p_rx_desc[i * dma_rx_descriptor_length];
g_ptm_priv_data.itf[i].tx_desc = &p_tx_desc[i * dma_tx_descriptor_length];
g_ptm_priv_data.itf[i].tx_skb = &ppskb[i * dma_tx_descriptor_length];
}
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.id = 0;
rx_desc.err = 0;
rx_desc.datalen = rx_max_packet_size;
for ( i = 0; i < MAX_ITF_NUMBER * dma_rx_descriptor_length; i++ ) {
skb = alloc_skb_rx();
if ( skb == NULL )
return -1;
rx_desc.dataptr = ((unsigned int)skb->data >> 2) & 0x0FFFFFFF;
p_rx_desc[i] = rx_desc;
}
return 0;
}
static INLINE void clear_priv_data(void)
{
int i, j;
struct sk_buff *skb;
for ( i = 0; i < MAX_ITF_NUMBER; i++ ) {
if ( g_ptm_priv_data.itf[i].tx_skb != NULL ) {
for ( j = 0; j < dma_tx_descriptor_length; j++ )
if ( g_ptm_priv_data.itf[i].tx_skb[j] != NULL )
dev_kfree_skb_any(g_ptm_priv_data.itf[i].tx_skb[j]);
}
if ( g_ptm_priv_data.itf[i].rx_desc != NULL ) {
for ( j = 0; j < dma_rx_descriptor_length; j++ ) {
if ( g_ptm_priv_data.itf[i].rx_desc[j].sop || g_ptm_priv_data.itf[i].rx_desc[j].eop ) { // descriptor initialized
skb = get_skb_rx_pointer(g_ptm_priv_data.itf[i].rx_desc[j].dataptr);
dev_kfree_skb_any(skb);
}
}
}
}
if ( g_ptm_priv_data.rx_desc_base != NULL )
kfree(g_ptm_priv_data.rx_desc_base);
if ( g_ptm_priv_data.tx_desc_base != NULL )
kfree(g_ptm_priv_data.tx_desc_base);
if ( g_ptm_priv_data.tx_skb_base != NULL )
kfree(g_ptm_priv_data.tx_skb_base);
}
static INLINE void init_tables(void)
{
int i;
volatile unsigned int *p;
struct wrx_dma_channel_config rx_config = {0};
struct wtx_dma_channel_config tx_config = {0};
struct wrx_port_cfg_status rx_port_cfg = { 0 };
struct wtx_port_cfg tx_port_cfg = { 0 };
/*
* CDM Block 1
*/
IFX_REG_W32(CDM_CFG_RAM1_SET(0x00) | CDM_CFG_RAM0_SET(0x00), CDM_CFG); // CDM block 1 must be data memory and mapped to 0x5000 (dword addr)
p = CDM_DATA_MEMORY(0, 0); // Clear CDM block 1
for ( i = 0; i < CDM_DATA_MEMORY_DWLEN; i++, p++ )
IFX_REG_W32(0, p);
/*
* General Registers
*/
IFX_REG_W32(write_desc_delay, CFG_WAN_WRDES_DELAY);
IFX_REG_W32((1 << MAX_RX_DMA_CHANNEL_NUMBER) - 1, CFG_WRX_DMACH_ON);
IFX_REG_W32((1 << MAX_TX_DMA_CHANNEL_NUMBER) - 1, CFG_WTX_DMACH_ON);
IFX_REG_W32(8, CFG_WRX_LOOK_BITTH); // WAN RX EFM-TC Looking Threshold
IFX_REG_W32(eth_efmtc_crc_cfg, CFG_ETH_EFMTC_CRC);
/*
* WRX DMA Channel Configuration Table
*/
rx_config.deslen = dma_rx_descriptor_length;
rx_port_cfg.mfs = ETH_MAX_FRAME_LENGTH;
rx_port_cfg.local_state = 0; // looking for sync
rx_port_cfg.partner_state = 0; // parter receiver is out of sync
for ( i = 0; i < MAX_RX_DMA_CHANNEL_NUMBER; i++ ) {
rx_config.desba = ((unsigned int)g_ptm_priv_data.itf[i].rx_desc >> 2) & 0x0FFFFFFF;
*WRX_DMA_CHANNEL_CONFIG(i) = rx_config;
rx_port_cfg.dmach = i;
*WRX_PORT_CONFIG(i) = rx_port_cfg;
}
/*
* WTX DMA Channel Configuration Table
*/
tx_config.deslen = dma_tx_descriptor_length;
tx_port_cfg.tx_cwth1 = 5;
tx_port_cfg.tx_cwth2 = 4;
for ( i = 0; i < MAX_TX_DMA_CHANNEL_NUMBER; i++ ) {
tx_config.desba = ((unsigned int)g_ptm_priv_data.itf[i].tx_desc >> 2) & 0x0FFFFFFF;
*WTX_DMA_CHANNEL_CONFIG(i) = tx_config;
*WTX_PORT_CONFIG(i) = tx_port_cfg;
}
}
/*
* ####################################
* Global Function
* ####################################
*/
static int ptm_showtime_enter(struct port_cell_info *port_cell, void *xdata_addr)
{
int i;
g_showtime = 1;
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ )
netif_carrier_on(g_net_dev[i]);
printk("enter showtime\n");
return 0;
}
static int ptm_showtime_exit(void)
{
int i;
if ( !g_showtime )
return -1;
for ( i = 0; i < ARRAY_SIZE(g_net_dev); i++ )
netif_carrier_off(g_net_dev[i]);
g_showtime = 0;
printk("leave showtime\n");
return 0;
}
/*
* ####################################
* Init/Cleanup API
* ####################################
*/
/*
* Description:
* Initialize global variables, PP32, comunication structures, register IRQ
* and register device.
* Input:
* none
* Output:
* 0 --- successful
* else --- failure, usually it is negative value of error code
*/
static int ifx_ptm_init(void)
{
int ret;
struct port_cell_info port_cell = {0};
void *xdata_addr = NULL;
int i;
char ver_str[256];
check_parameters();
ret = init_priv_data();
if ( ret != 0 ) {
err("INIT_PRIV_DATA_FAIL");
goto INIT_PRIV_DATA_FAIL;
}
ifx_ptm_init_chip();
init_tables();
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 */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0)
ret = request_irq(PPE_MAILBOX_IGU1_INT, mailbox_irq_handler, 0, "ptm_mailbox_isr", &g_ptm_priv_data);
#else
ret = request_irq(PPE_MAILBOX_IGU1_INT, mailbox_irq_handler, IRQF_DISABLED, "ptm_mailbox_isr", &g_ptm_priv_data);
#endif
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(0, MBOX_IGU1_IER);
IFX_REG_W32(~0, MBOX_IGU1_ISRC);
enable_irq(PPE_MAILBOX_IGU1_INT);
proc_file_create();
port_cell.port_num = 1;
ifx_mei_atm_showtime_check(&g_showtime, &port_cell, &xdata_addr);
if ( g_showtime ) {
ptm_showtime_enter(&port_cell, &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_PRIV_DATA_FAIL:
clear_priv_data();
printk("ifxmips_ptm: PTM init failed\n");
return ret;
}
/*
* Description:
* Release memory, free IRQ, and deregister device.
* Input:
* none
* Output:
* none
*/
static void __exit ifx_ptm_exit(void)
{
int i;
ifx_mei_atm_showtime_enter = NULL;
ifx_mei_atm_showtime_exit = NULL;
proc_file_delete();
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;
}
ifx_ptm_uninit_chip();
clear_priv_data();
}
module_init(ifx_ptm_init);
module_exit(ifx_ptm_exit);