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ltq_atm.c
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ltq_atm.c
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/******************************************************************************
**
** FILE NAME : ifxmips_atm_core.c
** PROJECT : UEIP
** MODULES : ATM
**
** DATE : 7 Jul 2009
** AUTHOR : Xu Liang
** DESCRIPTION : ATM driver common source file (core functions)
** 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
**
** Copyright 2017 Alexander Couzens <lynxis@fe80.eu>
*******************************************************************************/
#define IFX_ATM_VER_MAJOR 1
#define IFX_ATM_VER_MID 0
#define IFX_ATM_VER_MINOR 26
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/atmdev.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/atm.h>
#include <linux/clk.h>
#include <linux/interrupt.h>
#ifdef CONFIG_XFRM
#include <net/xfrm.h>
#endif
#include <lantiq_soc.h>
#include "ifxmips_atm_core.h"
#define MODULE_PARM_ARRAY(a, b) module_param_array(a, int, NULL, 0)
#define MODULE_PARM(a, b) module_param(a, int, 0)
/*!
\brief QSB cell delay variation due to concurrency
*/
static int qsb_tau = 1; /* QSB cell delay variation due to concurrency */
/*!
\brief QSB scheduler burst length
*/
static int qsb_srvm = 0x0F; /* QSB scheduler burst length */
/*!
\brief QSB time step, all legal values are 1, 2, 4
*/
static int qsb_tstep = 4 ; /* QSB time step, all legal values are 1, 2, 4 */
/*!
\brief Write descriptor delay
*/
static int write_descriptor_delay = 0x20; /* Write descriptor delay */
/*!
\brief AAL5 padding byte ('~')
*/
static int aal5_fill_pattern = 0x007E; /* AAL5 padding byte ('~') */
/*!
\brief Max frame size for RX
*/
static int aal5r_max_packet_size = 0x0700; /* Max frame size for RX */
/*!
\brief Min frame size for RX
*/
static int aal5r_min_packet_size = 0x0000; /* Min frame size for RX */
/*!
\brief Max frame size for TX
*/
static int aal5s_max_packet_size = 0x0700; /* Max frame size for TX */
/*!
\brief Min frame size for TX
*/
static int aal5s_min_packet_size = 0x0000; /* Min frame size for TX */
/*!
\brief Drop error packet in RX path
*/
static int aal5r_drop_error_packet = 1; /* Drop error packet in RX path */
/*!
\brief Number of descriptors per DMA RX channel
*/
static int dma_rx_descriptor_length = 128; /* Number of descriptors per DMA RX channel */
/*!
\brief Number of descriptors per DMA TX channel
*/
static int dma_tx_descriptor_length = 64; /* Number of descriptors per DMA TX channel */
/*!
\brief PPE core clock cycles between descriptor write and effectiveness in external RAM
*/
static int dma_rx_clp1_descriptor_threshold = 38;
/*@}*/
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(write_descriptor_delay, "i");
MODULE_PARM_DESC(write_descriptor_delay, "PPE core clock cycles between descriptor write and effectiveness in external RAM");
MODULE_PARM(aal5_fill_pattern, "i");
MODULE_PARM_DESC(aal5_fill_pattern, "Filling pattern (PAD) for AAL5 frames");
MODULE_PARM(aal5r_max_packet_size, "i");
MODULE_PARM_DESC(aal5r_max_packet_size, "Max packet size in byte for downstream AAL5 frames");
MODULE_PARM(aal5r_min_packet_size, "i");
MODULE_PARM_DESC(aal5r_min_packet_size, "Min packet size in byte for downstream AAL5 frames");
MODULE_PARM(aal5s_max_packet_size, "i");
MODULE_PARM_DESC(aal5s_max_packet_size, "Max packet size in byte for upstream AAL5 frames");
MODULE_PARM(aal5s_min_packet_size, "i");
MODULE_PARM_DESC(aal5s_min_packet_size, "Min packet size in byte for upstream AAL5 frames");
MODULE_PARM(aal5r_drop_error_packet, "i");
MODULE_PARM_DESC(aal5r_drop_error_packet, "Non-zero value to drop error packet for downstream");
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(dma_rx_clp1_descriptor_threshold, "i");
MODULE_PARM_DESC(dma_rx_clp1_descriptor_threshold, "Descriptor threshold for cells with cell loss priority 1");
/*
* ####################################
* Definition
* ####################################
*/
#ifdef CONFIG_AMAZON_SE
#define ENABLE_LESS_CACHE_INV 1
#define LESS_CACHE_INV_LEN 96
#endif
#define DUMP_SKB_LEN ~0
/*
* ####################################
* Declaration
* ####################################
*/
/*
* Network Operations
*/
static int ppe_ioctl(struct atm_dev *, unsigned int, void *);
static int ppe_open(struct atm_vcc *);
static void ppe_close(struct atm_vcc *);
static int ppe_send(struct atm_vcc *, struct sk_buff *);
static int ppe_send_oam(struct atm_vcc *, void *, int);
static int ppe_change_qos(struct atm_vcc *, struct atm_qos *, int);
/*
* ADSL LED
*/
static inline void adsl_led_flash(void);
/*
* 64-bit operation used by MIB calculation
*/
static inline void u64_add_u32(ppe_u64_t, unsigned int, ppe_u64_t *);
/*
* buffer manage functions
*/
static inline struct sk_buff* alloc_skb_rx(void);
static inline struct sk_buff* alloc_skb_tx(unsigned int);
static inline void atm_free_tx_skb_vcc(struct sk_buff *, struct atm_vcc *);
static inline struct sk_buff *get_skb_rx_pointer(unsigned int);
static inline int get_tx_desc(unsigned int);
/*
* mailbox handler and signal function
*/
static inline void mailbox_oam_rx_handler(void);
static inline void mailbox_aal_rx_handler(void);
static irqreturn_t mailbox_irq_handler(int, void *);
static inline void mailbox_signal(unsigned int, int);
static void do_ppe_tasklet(unsigned long);
DECLARE_TASKLET(g_dma_tasklet, do_ppe_tasklet, 0);
/*
* QSB & HTU setting functions
*/
static void set_qsb(struct atm_vcc *, struct atm_qos *, unsigned int);
static void qsb_global_set(void);
static inline void set_htu_entry(unsigned int, unsigned int, unsigned int, int, int);
static inline void clear_htu_entry(unsigned int);
static void validate_oam_htu_entry(void);
static void invalidate_oam_htu_entry(void);
/*
* look up for connection ID
*/
static inline int find_vpi(unsigned int);
static inline int find_vpivci(unsigned int, unsigned int);
static inline int find_vcc(struct atm_vcc *);
static inline int ifx_atm_version(const struct ltq_atm_ops *ops, 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_rx_tables(void);
static inline void init_tx_tables(void);
/*
* Exteranl Function
*/
#if defined(CONFIG_IFX_OAM) || defined(CONFIG_IFX_OAM_MODULE)
extern void ifx_push_oam(unsigned char *);
#else
static inline void ifx_push_oam(unsigned char *dummy) {}
#endif
#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);
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_led_blink(void);
#else
static inline int ifx_mei_atm_led_blink(void) { return 0; }
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;
}
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
static struct atm_priv_data g_atm_priv_data;
static struct atmdev_ops g_ifx_atm_ops = {
.open = ppe_open,
.close = ppe_close,
.ioctl = ppe_ioctl,
.send = ppe_send,
.send_oam = ppe_send_oam,
.change_qos = ppe_change_qos,
.owner = THIS_MODULE,
};
static int g_showtime = 0;
static void *g_xdata_addr = NULL;
static int ppe_ioctl(struct atm_dev *dev, unsigned int cmd, void *arg)
{
int ret = 0;
atm_cell_ifEntry_t mib_cell;
atm_aal5_ifEntry_t mib_aal5;
atm_aal5_vcc_x_t mib_vcc;
unsigned int value;
int conn;
if ( _IOC_TYPE(cmd) != PPE_ATM_IOC_MAGIC
|| _IOC_NR(cmd) >= PPE_ATM_IOC_MAXNR )
return -ENOTTY;
if ( _IOC_DIR(cmd) & _IOC_READ )
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
ret = !access_ok(arg, _IOC_SIZE(cmd));
#else
ret = !access_ok(VERIFY_WRITE, arg, _IOC_SIZE(cmd));
#endif
else if ( _IOC_DIR(cmd) & _IOC_WRITE )
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,0,0)
ret = !access_ok(arg, _IOC_SIZE(cmd));
#else
ret = !access_ok(VERIFY_READ, arg, _IOC_SIZE(cmd));
#endif
if ( ret )
return -EFAULT;
switch (cmd) {
case PPE_ATM_MIB_CELL: /* cell level MIB */
/* These MIB should be read at ARC side, now put zero only. */
mib_cell.ifHCInOctets_h = 0;
mib_cell.ifHCInOctets_l = 0;
mib_cell.ifHCOutOctets_h = 0;
mib_cell.ifHCOutOctets_l = 0;
mib_cell.ifInErrors = 0;
mib_cell.ifInUnknownProtos = WAN_MIB_TABLE->wrx_drophtu_cell;
mib_cell.ifOutErrors = 0;
ret = sizeof(mib_cell) - copy_to_user(arg, &mib_cell, sizeof(mib_cell));
break;
case PPE_ATM_MIB_AAL5: /* AAL5 MIB */
value = WAN_MIB_TABLE->wrx_total_byte;
u64_add_u32(g_atm_priv_data.wrx_total_byte, value - g_atm_priv_data.prev_wrx_total_byte, &g_atm_priv_data.wrx_total_byte);
g_atm_priv_data.prev_wrx_total_byte = value;
mib_aal5.ifHCInOctets_h = g_atm_priv_data.wrx_total_byte.h;
mib_aal5.ifHCInOctets_l = g_atm_priv_data.wrx_total_byte.l;
value = WAN_MIB_TABLE->wtx_total_byte;
u64_add_u32(g_atm_priv_data.wtx_total_byte, value - g_atm_priv_data.prev_wtx_total_byte, &g_atm_priv_data.wtx_total_byte);
g_atm_priv_data.prev_wtx_total_byte = value;
mib_aal5.ifHCOutOctets_h = g_atm_priv_data.wtx_total_byte.h;
mib_aal5.ifHCOutOctets_l = g_atm_priv_data.wtx_total_byte.l;
mib_aal5.ifInUcastPkts = g_atm_priv_data.wrx_pdu;
mib_aal5.ifOutUcastPkts = WAN_MIB_TABLE->wtx_total_pdu;
mib_aal5.ifInErrors = WAN_MIB_TABLE->wrx_err_pdu;
mib_aal5.ifInDiscards = WAN_MIB_TABLE->wrx_dropdes_pdu + g_atm_priv_data.wrx_drop_pdu;
mib_aal5.ifOutErros = g_atm_priv_data.wtx_err_pdu;
mib_aal5.ifOutDiscards = g_atm_priv_data.wtx_drop_pdu;
ret = sizeof(mib_aal5) - copy_to_user(arg, &mib_aal5, sizeof(mib_aal5));
break;
case PPE_ATM_MIB_VCC: /* VCC related MIB */
copy_from_user(&mib_vcc, arg, sizeof(mib_vcc));
conn = find_vpivci(mib_vcc.vpi, mib_vcc.vci);
if (conn >= 0) {
mib_vcc.mib_vcc.aal5VccCrcErrors = g_atm_priv_data.conn[conn].aal5_vcc_crc_err;
mib_vcc.mib_vcc.aal5VccOverSizedSDUs = g_atm_priv_data.conn[conn].aal5_vcc_oversize_sdu;
mib_vcc.mib_vcc.aal5VccSarTimeOuts = 0; /* no timer support */
ret = sizeof(mib_vcc) - copy_to_user(arg, &mib_vcc, sizeof(mib_vcc));
} else
ret = -EINVAL;
break;
default:
ret = -ENOIOCTLCMD;
}
return ret;
}
static int ppe_open(struct atm_vcc *vcc)
{
int ret;
short vpi = vcc->vpi;
int vci = vcc->vci;
struct port *port = &g_atm_priv_data.port[(int)vcc->dev->dev_data];
int conn;
int f_enable_irq = 0;
if ( vcc->qos.aal != ATM_AAL5 && vcc->qos.aal != ATM_AAL0 )
return -EPROTONOSUPPORT;
#if !defined(DISABLE_QOS_WORKAROUND) || !DISABLE_QOS_WORKAROUND
/* check bandwidth */
if ( (vcc->qos.txtp.traffic_class == ATM_CBR && vcc->qos.txtp.max_pcr > (port->tx_max_cell_rate - port->tx_current_cell_rate))
|| (vcc->qos.txtp.traffic_class == ATM_VBR_RT && vcc->qos.txtp.max_pcr > (port->tx_max_cell_rate - port->tx_current_cell_rate))
#if 0
|| (vcc->qos.txtp.traffic_class == ATM_VBR_NRT && vcc->qos.txtp.scr > (port->tx_max_cell_rate - port->tx_current_cell_rate))
#endif
|| (vcc->qos.txtp.traffic_class == ATM_UBR_PLUS && vcc->qos.txtp.min_pcr > (port->tx_max_cell_rate - port->tx_current_cell_rate)) )
{
ret = -EINVAL;
goto PPE_OPEN_EXIT;
}
#endif
/* check existing vpi,vci */
conn = find_vpivci(vpi, vci);
if ( conn >= 0 ) {
ret = -EADDRINUSE;
goto PPE_OPEN_EXIT;
}
/* check whether it need to enable irq */
if ( g_atm_priv_data.conn_table == 0 )
f_enable_irq = 1;
/* allocate connection */
for ( conn = 0; conn < MAX_PVC_NUMBER; conn++ ) {
if ( test_and_set_bit(conn, &g_atm_priv_data.conn_table) == 0 ) {
g_atm_priv_data.conn[conn].vcc = vcc;
break;
}
}
if ( conn == MAX_PVC_NUMBER ) {
ret = -EINVAL;
goto PPE_OPEN_EXIT;
}
/* reserve bandwidth */
switch ( vcc->qos.txtp.traffic_class ) {
case ATM_CBR:
case ATM_VBR_RT:
port->tx_current_cell_rate += vcc->qos.txtp.max_pcr;
break;
case ATM_VBR_NRT:
#if 0
port->tx_current_cell_rate += vcc->qos.txtp.scr;
#endif
break;
case ATM_UBR_PLUS:
port->tx_current_cell_rate += vcc->qos.txtp.min_pcr;
break;
}
/* set qsb */
set_qsb(vcc, &vcc->qos, conn);
/* update atm_vcc structure */
vcc->itf = (int)vcc->dev->dev_data;
vcc->vpi = vpi;
vcc->vci = vci;
set_bit(ATM_VF_READY, &vcc->flags);
/* enable irq */
if ( f_enable_irq ) {
*MBOX_IGU1_ISRC = (1 << RX_DMA_CH_AAL) | (1 << RX_DMA_CH_OAM);
*MBOX_IGU1_IER = (1 << RX_DMA_CH_AAL) | (1 << RX_DMA_CH_OAM);
enable_irq(PPE_MAILBOX_IGU1_INT);
}
/* set port */
WTX_QUEUE_CONFIG(conn + FIRST_QSB_QID)->sbid = (int)vcc->dev->dev_data;
/* set htu entry */
set_htu_entry(vpi, vci, conn, vcc->qos.aal == ATM_AAL5 ? 1 : 0, 0);
*MBOX_IGU1_ISRC |= (1 << (conn + FIRST_QSB_QID + 16));
*MBOX_IGU1_IER |= (1 << (conn + FIRST_QSB_QID + 16));
ret = 0;
PPE_OPEN_EXIT:
return ret;
}
static void ppe_close(struct atm_vcc *vcc)
{
int conn;
struct port *port;
struct connection *connection;
if ( vcc == NULL )
return;
/* get connection id */
conn = find_vcc(vcc);
if ( conn < 0 ) {
pr_err("can't find vcc\n");
goto PPE_CLOSE_EXIT;
}
connection = &g_atm_priv_data.conn[conn];
port = &g_atm_priv_data.port[connection->port];
/* clear htu */
clear_htu_entry(conn);
/* release connection */
connection->vcc = NULL;
connection->aal5_vcc_crc_err = 0;
connection->aal5_vcc_oversize_sdu = 0;
clear_bit(conn, &g_atm_priv_data.conn_table);
/* disable irq */
if ( g_atm_priv_data.conn_table == 0 )
disable_irq(PPE_MAILBOX_IGU1_INT);
/* release bandwidth */
switch ( vcc->qos.txtp.traffic_class )
{
case ATM_CBR:
case ATM_VBR_RT:
port->tx_current_cell_rate -= vcc->qos.txtp.max_pcr;
break;
case ATM_VBR_NRT:
#if 0
port->tx_current_cell_rate -= vcc->qos.txtp.scr;
#endif
break;
case ATM_UBR_PLUS:
port->tx_current_cell_rate -= vcc->qos.txtp.min_pcr;
break;
}
/* wait for incoming packets to be processed by upper layers */
tasklet_unlock_wait(&g_dma_tasklet);
PPE_CLOSE_EXIT:
return;
}
static int ppe_send(struct atm_vcc *vcc, struct sk_buff *skb)
{
int ret;
int conn;
int desc_base;
int byteoff;
int required;
/* the len of the data without offset and header */
int datalen;
unsigned long flags;
struct tx_descriptor reg_desc = {0};
struct tx_inband_header *header;
if ( vcc == NULL || skb == NULL )
return -EINVAL;
conn = find_vcc(vcc);
if ( conn < 0 ) {
ret = -EINVAL;
goto FIND_VCC_FAIL;
}
if ( !g_showtime ) {
pr_debug("not in showtime\n");
ret = -EIO;
goto PPE_SEND_FAIL;
}
byteoff = (unsigned int)skb->data & (DATA_BUFFER_ALIGNMENT - 1);
required = sizeof(*header) + byteoff;
if (!skb_clone_writable(skb, required)) {
int expand_by = 0;
int ret;
if (skb_headroom(skb) < required)
expand_by = required - skb_headroom(skb);
ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
if (ret) {
printk("pskb_expand_head failed.\n");
atm_free_tx_skb_vcc(skb, vcc);
return ret;
}
}
datalen = skb->len;
header = (void *)skb_push(skb, byteoff + TX_INBAND_HEADER_LENGTH);
if ( vcc->qos.aal == ATM_AAL5 ) {
/* setup inband trailer */
header->uu = 0;
header->cpi = 0;
header->pad = aal5_fill_pattern;
header->res1 = 0;
/* setup cell header */
header->clp = (vcc->atm_options & ATM_ATMOPT_CLP) ? 1 : 0;
header->pti = ATM_PTI_US0;
header->vci = vcc->vci;
header->vpi = vcc->vpi;
header->gfc = 0;
/* setup descriptor */
reg_desc.dataptr = (unsigned int)skb->data >> 2;
reg_desc.datalen = datalen;
reg_desc.byteoff = byteoff;
reg_desc.iscell = 0;
} else {
reg_desc.dataptr = (unsigned int)skb->data >> 2;
reg_desc.datalen = skb->len;
reg_desc.byteoff = byteoff;
reg_desc.iscell = 1;
}
reg_desc.own = 1;
reg_desc.c = 1;
reg_desc.sop = reg_desc.eop = 1;
spin_lock_irqsave(&g_atm_priv_data.conn[conn].lock, flags);
desc_base = get_tx_desc(conn);
if ( desc_base < 0 ) {
spin_unlock_irqrestore(&g_atm_priv_data.conn[conn].lock, flags);
pr_debug("ALLOC_TX_CONNECTION_FAIL\n");
ret = -EIO;
goto PPE_SEND_FAIL;
}
/* update descriptor send pointer */
if ( g_atm_priv_data.conn[conn].tx_skb[desc_base] != NULL )
dev_kfree_skb_any(g_atm_priv_data.conn[conn].tx_skb[desc_base]);
g_atm_priv_data.conn[conn].tx_skb[desc_base] = skb;
spin_unlock_irqrestore(&g_atm_priv_data.conn[conn].lock, flags);
if ( vcc->stats )
atomic_inc(&vcc->stats->tx);
if ( vcc->qos.aal == ATM_AAL5 )
g_atm_priv_data.wtx_pdu++;
/* write discriptor to memory and write back cache */
g_atm_priv_data.conn[conn].tx_desc[desc_base] = reg_desc;
dma_cache_wback((unsigned long)skb->data, skb->len);
mailbox_signal(conn, 1);
adsl_led_flash();
return 0;
FIND_VCC_FAIL:
pr_err("FIND_VCC_FAIL\n");
g_atm_priv_data.wtx_err_pdu++;
dev_kfree_skb_any(skb);
return ret;
PPE_SEND_FAIL:
if ( vcc->qos.aal == ATM_AAL5 )
g_atm_priv_data.wtx_drop_pdu++;
if ( vcc->stats )
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb_any(skb);
return ret;
}
/* operation and maintainance */
static int ppe_send_oam(struct atm_vcc *vcc, void *cell, int flags)
{
int conn;
struct uni_cell_header *uni_cell_header = (struct uni_cell_header *)cell;
int desc_base;
struct sk_buff *skb;
struct tx_descriptor reg_desc = {0};
if ( ((uni_cell_header->pti == ATM_PTI_SEGF5 || uni_cell_header->pti == ATM_PTI_E2EF5)
&& find_vpivci(uni_cell_header->vpi, uni_cell_header->vci) < 0)
|| ((uni_cell_header->vci == 0x03 || uni_cell_header->vci == 0x04)
&& find_vpi(uni_cell_header->vpi) < 0) )
{
g_atm_priv_data.wtx_err_oam++;
return -EINVAL;
}
if ( !g_showtime ) {
pr_err("not in showtime\n");
g_atm_priv_data.wtx_drop_oam++;
return -EIO;
}
conn = find_vcc(vcc);
if ( conn < 0 ) {
pr_err("FIND_VCC_FAIL\n");
g_atm_priv_data.wtx_drop_oam++;
return -EINVAL;
}
skb = alloc_skb_tx(CELL_SIZE);
if ( skb == NULL ) {
pr_err("ALLOC_SKB_TX_FAIL\n");
g_atm_priv_data.wtx_drop_oam++;
return -ENOMEM;
}
skb_put(skb, CELL_SIZE);
memcpy(skb->data, cell, CELL_SIZE);
reg_desc.dataptr = (unsigned int)skb->data >> 2;
reg_desc.datalen = CELL_SIZE;
reg_desc.byteoff = 0;
reg_desc.iscell = 1;
reg_desc.own = 1;
reg_desc.c = 1;
reg_desc.sop = reg_desc.eop = 1;
desc_base = get_tx_desc(conn);
if ( desc_base < 0 ) {
dev_kfree_skb_any(skb);
pr_err("ALLOC_TX_CONNECTION_FAIL\n");
g_atm_priv_data.wtx_drop_oam++;
return -EIO;
}
if ( vcc->stats )
atomic_inc(&vcc->stats->tx);
/* update descriptor send pointer */
if ( g_atm_priv_data.conn[conn].tx_skb[desc_base] != NULL )
dev_kfree_skb_any(g_atm_priv_data.conn[conn].tx_skb[desc_base]);
g_atm_priv_data.conn[conn].tx_skb[desc_base] = skb;
/* write discriptor to memory and write back cache */
g_atm_priv_data.conn[conn].tx_desc[desc_base] = reg_desc;
dma_cache_wback((unsigned long)skb->data, CELL_SIZE);
mailbox_signal(conn, 1);
g_atm_priv_data.wtx_oam++;
adsl_led_flash();
return 0;
}
static int ppe_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
{
int conn;
if ( vcc == NULL || qos == NULL )
return -EINVAL;
conn = find_vcc(vcc);
if ( conn < 0 )
return -EINVAL;
set_qsb(vcc, qos, conn);
return 0;
}
static inline void adsl_led_flash(void)
{
ifx_mei_atm_led_blink();
}
/*
* Description:
* Add a 32-bit value to 64-bit value, and put result in a 64-bit variable.
* Input:
* opt1 --- ppe_u64_t, first operand, a 64-bit unsigned integer value
* opt2 --- unsigned int, second operand, a 32-bit unsigned integer value
* ret --- ppe_u64_t, pointer to a variable to hold result
* Output:
* none
*/
static inline void u64_add_u32(ppe_u64_t opt1, unsigned int opt2, ppe_u64_t *ret)
{
ret->l = opt1.l + opt2;
if ( ret->l < opt1.l || ret->l < opt2 )
ret->h++;
}
static inline struct sk_buff* alloc_skb_rx(void)
{
struct sk_buff *skb;
skb = dev_alloc_skb(RX_DMA_CH_AAL_BUF_SIZE + DATA_BUFFER_ALIGNMENT);
if ( skb != NULL ) {
/* must be burst length 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;
/* write back and invalidate cache */
dma_cache_wback_inv((unsigned long)skb->data - sizeof(skb), sizeof(skb));
/* invalidate cache */
#if defined(ENABLE_LESS_CACHE_INV) && ENABLE_LESS_CACHE_INV
dma_cache_inv((unsigned long)skb->data, LESS_CACHE_INV_LEN);
#else
dma_cache_inv((unsigned long)skb->data, RX_DMA_CH_AAL_BUF_SIZE);
#endif
}
return skb;
}
static inline struct sk_buff* alloc_skb_tx(unsigned int size)
{
struct sk_buff *skb;
/* allocate memory including header and padding */
size += TX_INBAND_HEADER_LENGTH + MAX_TX_PACKET_ALIGN_BYTES + MAX_TX_PACKET_PADDING_BYTES;
size &= ~(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)) + TX_INBAND_HEADER_LENGTH);
return skb;
}
static inline void atm_free_tx_skb_vcc(struct sk_buff *skb, struct atm_vcc *vcc)
{
if ( vcc->pop != NULL )
vcc->pop(vcc, skb);
else
dev_kfree_skb_any(skb);
}
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 conn)
{
int desc_base = -1;
struct connection *p_conn = &g_atm_priv_data.conn[conn];
if ( p_conn->tx_desc[p_conn->tx_desc_pos].own == 0 ) {
desc_base = p_conn->tx_desc_pos;
if ( ++(p_conn->tx_desc_pos) == dma_tx_descriptor_length )
p_conn->tx_desc_pos = 0;
}
return desc_base;
}
static void free_tx_ring(unsigned int queue)
{
unsigned long flags;
int i;
struct connection *conn = &g_atm_priv_data.conn[queue];
struct sk_buff *skb;
if (!conn)
return;
spin_lock_irqsave(&conn->lock, flags);
for (i = 0; i < dma_tx_descriptor_length; i++) {
if (conn->tx_desc[i].own == 0 && conn->tx_skb[i] != NULL) {
skb = conn->tx_skb[i];
conn->tx_skb[i] = NULL;
atm_free_tx_skb_vcc(skb, ATM_SKB(skb)->vcc);
}
}
spin_unlock_irqrestore(&conn->lock, flags);
}
static void mailbox_tx_handler(unsigned int queue_bitmap)
{
int i;
int bit;
/* only get valid queues */
queue_bitmap &= g_atm_priv_data.conn_table;
for ( i = 0, bit = 1; i < MAX_PVC_NUMBER; i++, bit <<= 1 ) {
if (queue_bitmap & bit)
free_tx_ring(i);
}
}
static inline void mailbox_oam_rx_handler(void)
{
unsigned int vlddes = WRX_DMA_CHANNEL_CONFIG(RX_DMA_CH_OAM)->vlddes;
struct rx_descriptor reg_desc;
struct uni_cell_header *header;
int conn;
struct atm_vcc *vcc;
unsigned int i;
for ( i = 0; i < vlddes; i++ ) {
unsigned int loop_count = 0;
do {
reg_desc = g_atm_priv_data.oam_desc[g_atm_priv_data.oam_desc_pos];
if ( ++loop_count == 1000 )
break;
} while ( reg_desc.own || !reg_desc.c ); // keep test OWN and C bit until data is ready
ASSERT(loop_count == 1, "loop_count = %u, own = %d, c = %d, oam_desc_pos = %u", loop_count, (int)reg_desc.own, (int)reg_desc.c, g_atm_priv_data.oam_desc_pos);
header = (struct uni_cell_header *)&g_atm_priv_data.oam_buf[g_atm_priv_data.oam_desc_pos * RX_DMA_CH_OAM_BUF_SIZE];
if ( header->pti == ATM_PTI_SEGF5 || header->pti == ATM_PTI_E2EF5 )
conn = find_vpivci(header->vpi, header->vci);
else if ( header->vci == 0x03 || header->vci == 0x04 )
conn = find_vpi(header->vpi);
else
conn = -1;
if ( conn >= 0 && g_atm_priv_data.conn[conn].vcc != NULL ) {
vcc = g_atm_priv_data.conn[conn].vcc;
if ( vcc->push_oam != NULL )
vcc->push_oam(vcc, header);
else
ifx_push_oam((unsigned char *)header);
g_atm_priv_data.wrx_oam++;
adsl_led_flash();
} else
g_atm_priv_data.wrx_drop_oam++;
reg_desc.byteoff = 0;
reg_desc.datalen = RX_DMA_CH_OAM_BUF_SIZE;
reg_desc.own = 1;
reg_desc.c = 0;
g_atm_priv_data.oam_desc[g_atm_priv_data.oam_desc_pos] = reg_desc;
if ( ++g_atm_priv_data.oam_desc_pos == RX_DMA_CH_OAM_DESC_LEN )
g_atm_priv_data.oam_desc_pos = 0;
dma_cache_inv((unsigned long)header, CELL_SIZE);
mailbox_signal(RX_DMA_CH_OAM, 0);
}
}
static inline void mailbox_aal_rx_handler(void)
{
unsigned int vlddes = WRX_DMA_CHANNEL_CONFIG(RX_DMA_CH_AAL)->vlddes;
struct rx_descriptor reg_desc;
int conn;
struct atm_vcc *vcc;
struct sk_buff *skb, *new_skb;
struct rx_inband_trailer *trailer;
unsigned int i;
for ( i = 0; i < vlddes; i++ ) {
unsigned int loop_count = 0;
do {
reg_desc = g_atm_priv_data.aal_desc[g_atm_priv_data.aal_desc_pos];
if ( ++loop_count == 1000 )
break;
} while ( reg_desc.own || !reg_desc.c ); // keep test OWN and C bit until data is ready
ASSERT(loop_count == 1, "loop_count = %u, own = %d, c = %d, aal_desc_pos = %u", loop_count, (int)reg_desc.own, (int)reg_desc.c, g_atm_priv_data.aal_desc_pos);
conn = reg_desc.id;
if ( g_atm_priv_data.conn[conn].vcc != NULL ) {
vcc = g_atm_priv_data.conn[conn].vcc;
skb = get_skb_rx_pointer(reg_desc.dataptr);
if ( reg_desc.err ) {
if ( vcc->qos.aal == ATM_AAL5 ) {
trailer = (struct rx_inband_trailer *)((unsigned int)skb->data + ((reg_desc.byteoff + reg_desc.datalen + MAX_RX_PACKET_PADDING_BYTES) & ~MAX_RX_PACKET_PADDING_BYTES));
if ( trailer->stw_crc )
g_atm_priv_data.conn[conn].aal5_vcc_crc_err++;
if ( trailer->stw_ovz )
g_atm_priv_data.conn[conn].aal5_vcc_oversize_sdu++;
g_atm_priv_data.wrx_drop_pdu++;
}
if ( vcc->stats ) {
atomic_inc(&vcc->stats->rx_drop);
atomic_inc(&vcc->stats->rx_err);
}
reg_desc.err = 0;
} else if ( atm_charge(vcc, skb->truesize) ) {
new_skb = alloc_skb_rx();
if ( new_skb != NULL ) {
#if defined(ENABLE_LESS_CACHE_INV) && ENABLE_LESS_CACHE_INV
if ( reg_desc.byteoff + reg_desc.datalen > LESS_CACHE_INV_LEN )
dma_cache_inv((unsigned long)skb->data + LESS_CACHE_INV_LEN, reg_desc.byteoff + reg_desc.datalen - LESS_CACHE_INV_LEN);
#endif
skb_reserve(skb, reg_desc.byteoff);
skb_put(skb, reg_desc.datalen);
ATM_SKB(skb)->vcc = vcc;
vcc->push(vcc, skb);
if ( vcc->qos.aal == ATM_AAL5 )
g_atm_priv_data.wrx_pdu++;
if ( vcc->stats )
atomic_inc(&vcc->stats->rx);
adsl_led_flash();
reg_desc.dataptr = (unsigned int)new_skb->data >> 2;
} else {
atm_return(vcc, skb->truesize);
if ( vcc->qos.aal == ATM_AAL5 )
g_atm_priv_data.wrx_drop_pdu++;
if ( vcc->stats )
atomic_inc(&vcc->stats->rx_drop);
}
} else {
if ( vcc->qos.aal == ATM_AAL5 )
g_atm_priv_data.wrx_drop_pdu++;
if ( vcc->stats )
atomic_inc(&vcc->stats->rx_drop);
}
} else {
g_atm_priv_data.wrx_drop_pdu++;
}
reg_desc.byteoff = 0;
reg_desc.datalen = RX_DMA_CH_AAL_BUF_SIZE;
reg_desc.own = 1;
reg_desc.c = 0;