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linux-stable/drivers/atm/idt77252.c
Julia Lawall 1790c228fb drivers/atm/idt77252.c: Remove unnecessary error check 
This code does not call deinit_card(card); in an error case, as done in
other error-handling code in the same function.  But actually, the called
function init_sram can only return 0, so there is no need for the error
check at all.

init_sram is also given a void return type, and its single return statement
at the end of the function is dropped.

A simplified version of the sematic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
@r@
statement S1,S2,S3;
constant C1,C2,C3;
@@

*if (...)
 {... S1 return -C1;}
...
*if (...)
 {... when != S1
    return -C2;}
...
*if (...)
 {... S1 return -C3;}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-03 22:06:11 -07:00

3845 lines
90 KiB
C
Raw Blame History

/*******************************************************************
*
* Copyright (c) 2000 ATecoM GmbH
*
* The author may be reached at ecd@atecom.com.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*******************************************************************/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/poison.h>
#include <linux/skbuff.h>
#include <linux/kernel.h>
#include <linux/vmalloc.h>
#include <linux/netdevice.h>
#include <linux/atmdev.h>
#include <linux/atm.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/wait.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <asm/byteorder.h>
#ifdef CONFIG_ATM_IDT77252_USE_SUNI
#include "suni.h"
#endif /* CONFIG_ATM_IDT77252_USE_SUNI */
#include "idt77252.h"
#include "idt77252_tables.h"
static unsigned int vpibits = 1;
#define ATM_IDT77252_SEND_IDLE 1
/*
* Debug HACKs.
*/
#define DEBUG_MODULE 1
#undef HAVE_EEPROM /* does not work, yet. */
#ifdef CONFIG_ATM_IDT77252_DEBUG
static unsigned long debug = DBG_GENERAL;
#endif
#define SAR_RX_DELAY (SAR_CFG_RXINT_NODELAY)
/*
* SCQ Handling.
*/
static struct scq_info *alloc_scq(struct idt77252_dev *, int);
static void free_scq(struct idt77252_dev *, struct scq_info *);
static int queue_skb(struct idt77252_dev *, struct vc_map *,
struct sk_buff *, int oam);
static void drain_scq(struct idt77252_dev *, struct vc_map *);
static unsigned long get_free_scd(struct idt77252_dev *, struct vc_map *);
static void fill_scd(struct idt77252_dev *, struct scq_info *, int);
/*
* FBQ Handling.
*/
static int push_rx_skb(struct idt77252_dev *,
struct sk_buff *, int queue);
static void recycle_rx_skb(struct idt77252_dev *, struct sk_buff *);
static void flush_rx_pool(struct idt77252_dev *, struct rx_pool *);
static void recycle_rx_pool_skb(struct idt77252_dev *,
struct rx_pool *);
static void add_rx_skb(struct idt77252_dev *, int queue,
unsigned int size, unsigned int count);
/*
* RSQ Handling.
*/
static int init_rsq(struct idt77252_dev *);
static void deinit_rsq(struct idt77252_dev *);
static void idt77252_rx(struct idt77252_dev *);
/*
* TSQ handling.
*/
static int init_tsq(struct idt77252_dev *);
static void deinit_tsq(struct idt77252_dev *);
static void idt77252_tx(struct idt77252_dev *);
/*
* ATM Interface.
*/
static void idt77252_dev_close(struct atm_dev *dev);
static int idt77252_open(struct atm_vcc *vcc);
static void idt77252_close(struct atm_vcc *vcc);
static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb);
static int idt77252_send_oam(struct atm_vcc *vcc, void *cell,
int flags);
static void idt77252_phy_put(struct atm_dev *dev, unsigned char value,
unsigned long addr);
static unsigned char idt77252_phy_get(struct atm_dev *dev, unsigned long addr);
static int idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos,
int flags);
static int idt77252_proc_read(struct atm_dev *dev, loff_t * pos,
char *page);
static void idt77252_softint(struct work_struct *work);
static struct atmdev_ops idt77252_ops =
{
.dev_close = idt77252_dev_close,
.open = idt77252_open,
.close = idt77252_close,
.send = idt77252_send,
.send_oam = idt77252_send_oam,
.phy_put = idt77252_phy_put,
.phy_get = idt77252_phy_get,
.change_qos = idt77252_change_qos,
.proc_read = idt77252_proc_read,
.owner = THIS_MODULE
};
static struct idt77252_dev *idt77252_chain = NULL;
static unsigned int idt77252_sram_write_errors = 0;
/*****************************************************************************/
/* */
/* I/O and Utility Bus */
/* */
/*****************************************************************************/
static void
waitfor_idle(struct idt77252_dev *card)
{
u32 stat;
stat = readl(SAR_REG_STAT);
while (stat & SAR_STAT_CMDBZ)
stat = readl(SAR_REG_STAT);
}
static u32
read_sram(struct idt77252_dev *card, unsigned long addr)
{
unsigned long flags;
u32 value;
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_READ_SRAM | (addr << 2), SAR_REG_CMD);
waitfor_idle(card);
value = readl(SAR_REG_DR0);
spin_unlock_irqrestore(&card->cmd_lock, flags);
return value;
}
static void
write_sram(struct idt77252_dev *card, unsigned long addr, u32 value)
{
unsigned long flags;
if ((idt77252_sram_write_errors == 0) &&
(((addr > card->tst[0] + card->tst_size - 2) &&
(addr < card->tst[0] + card->tst_size)) ||
((addr > card->tst[1] + card->tst_size - 2) &&
(addr < card->tst[1] + card->tst_size)))) {
printk("%s: ERROR: TST JMP section at %08lx written: %08x\n",
card->name, addr, value);
}
spin_lock_irqsave(&card->cmd_lock, flags);
writel(value, SAR_REG_DR0);
writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
}
static u8
read_utility(void *dev, unsigned long ubus_addr)
{
struct idt77252_dev *card = dev;
unsigned long flags;
u8 value;
if (!card) {
printk("Error: No such device.\n");
return -1;
}
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_READ_UTILITY + ubus_addr, SAR_REG_CMD);
waitfor_idle(card);
value = readl(SAR_REG_DR0);
spin_unlock_irqrestore(&card->cmd_lock, flags);
return value;
}
static void
write_utility(void *dev, unsigned long ubus_addr, u8 value)
{
struct idt77252_dev *card = dev;
unsigned long flags;
if (!card) {
printk("Error: No such device.\n");
return;
}
spin_lock_irqsave(&card->cmd_lock, flags);
writel((u32) value, SAR_REG_DR0);
writel(SAR_CMD_WRITE_UTILITY + ubus_addr, SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
}
#ifdef HAVE_EEPROM
static u32 rdsrtab[] =
{
SAR_GP_EECS | SAR_GP_EESCLK,
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
0,
SAR_GP_EESCLK, /* 0 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
};
static u32 wrentab[] =
{
SAR_GP_EECS | SAR_GP_EESCLK,
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK /* 0 */
};
static u32 rdtab[] =
{
SAR_GP_EECS | SAR_GP_EESCLK,
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO /* 1 */
};
static u32 wrtab[] =
{
SAR_GP_EECS | SAR_GP_EESCLK,
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
0,
SAR_GP_EESCLK, /* 0 */
SAR_GP_EEDO,
SAR_GP_EESCLK | SAR_GP_EEDO, /* 1 */
0,
SAR_GP_EESCLK /* 0 */
};
static u32 clktab[] =
{
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0,
SAR_GP_EESCLK,
0
};
static u32
idt77252_read_gp(struct idt77252_dev *card)
{
u32 gp;
gp = readl(SAR_REG_GP);
#if 0
printk("RD: %s\n", gp & SAR_GP_EEDI ? "1" : "0");
#endif
return gp;
}
static void
idt77252_write_gp(struct idt77252_dev *card, u32 value)
{
unsigned long flags;
#if 0
printk("WR: %s %s %s\n", value & SAR_GP_EECS ? " " : "/CS",
value & SAR_GP_EESCLK ? "HIGH" : "LOW ",
value & SAR_GP_EEDO ? "1" : "0");
#endif
spin_lock_irqsave(&card->cmd_lock, flags);
waitfor_idle(card);
writel(value, SAR_REG_GP);
spin_unlock_irqrestore(&card->cmd_lock, flags);
}
static u8
idt77252_eeprom_read_status(struct idt77252_dev *card)
{
u8 byte;
u32 gp;
int i, j;
gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
idt77252_write_gp(card, gp | rdsrtab[i]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
byte = 0;
for (i = 0, j = 0; i < 8; i++) {
byte <<= 1;
idt77252_write_gp(card, gp | clktab[j++]);
udelay(5);
byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
idt77252_write_gp(card, gp | clktab[j++]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
return byte;
}
static u8
idt77252_eeprom_read_byte(struct idt77252_dev *card, u8 offset)
{
u8 byte;
u32 gp;
int i, j;
gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
for (i = 0; i < ARRAY_SIZE(rdtab); i++) {
idt77252_write_gp(card, gp | rdtab[i]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
for (i = 0, j = 0; i < 8; i++) {
idt77252_write_gp(card, gp | clktab[j++] |
(offset & 1 ? SAR_GP_EEDO : 0));
udelay(5);
idt77252_write_gp(card, gp | clktab[j++] |
(offset & 1 ? SAR_GP_EEDO : 0));
udelay(5);
offset >>= 1;
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
byte = 0;
for (i = 0, j = 0; i < 8; i++) {
byte <<= 1;
idt77252_write_gp(card, gp | clktab[j++]);
udelay(5);
byte |= idt77252_read_gp(card) & SAR_GP_EEDI ? 1 : 0;
idt77252_write_gp(card, gp | clktab[j++]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
return byte;
}
static void
idt77252_eeprom_write_byte(struct idt77252_dev *card, u8 offset, u8 data)
{
u32 gp;
int i, j;
gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
for (i = 0; i < ARRAY_SIZE(wrentab); i++) {
idt77252_write_gp(card, gp | wrentab[i]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
for (i = 0; i < ARRAY_SIZE(wrtab); i++) {
idt77252_write_gp(card, gp | wrtab[i]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
for (i = 0, j = 0; i < 8; i++) {
idt77252_write_gp(card, gp | clktab[j++] |
(offset & 1 ? SAR_GP_EEDO : 0));
udelay(5);
idt77252_write_gp(card, gp | clktab[j++] |
(offset & 1 ? SAR_GP_EEDO : 0));
udelay(5);
offset >>= 1;
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
for (i = 0, j = 0; i < 8; i++) {
idt77252_write_gp(card, gp | clktab[j++] |
(data & 1 ? SAR_GP_EEDO : 0));
udelay(5);
idt77252_write_gp(card, gp | clktab[j++] |
(data & 1 ? SAR_GP_EEDO : 0));
udelay(5);
data >>= 1;
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
}
static void
idt77252_eeprom_init(struct idt77252_dev *card)
{
u32 gp;
gp = idt77252_read_gp(card) & ~(SAR_GP_EESCLK|SAR_GP_EECS|SAR_GP_EEDO);
idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
udelay(5);
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
idt77252_write_gp(card, gp | SAR_GP_EECS | SAR_GP_EESCLK);
udelay(5);
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
}
#endif /* HAVE_EEPROM */
#ifdef CONFIG_ATM_IDT77252_DEBUG
static void
dump_tct(struct idt77252_dev *card, int index)
{
unsigned long tct;
int i;
tct = (unsigned long) (card->tct_base + index * SAR_SRAM_TCT_SIZE);
printk("%s: TCT %x:", card->name, index);
for (i = 0; i < 8; i++) {
printk(" %08x", read_sram(card, tct + i));
}
printk("\n");
}
static void
idt77252_tx_dump(struct idt77252_dev *card)
{
struct atm_vcc *vcc;
struct vc_map *vc;
int i;
printk("%s\n", __func__);
for (i = 0; i < card->tct_size; i++) {
vc = card->vcs[i];
if (!vc)
continue;
vcc = NULL;
if (vc->rx_vcc)
vcc = vc->rx_vcc;
else if (vc->tx_vcc)
vcc = vc->tx_vcc;
if (!vcc)
continue;
printk("%s: Connection %d:\n", card->name, vc->index);
dump_tct(card, vc->index);
}
}
#endif
/*****************************************************************************/
/* */
/* SCQ Handling */
/* */
/*****************************************************************************/
static int
sb_pool_add(struct idt77252_dev *card, struct sk_buff *skb, int queue)
{
struct sb_pool *pool = &card->sbpool[queue];
int index;
index = pool->index;
while (pool->skb[index]) {
index = (index + 1) & FBQ_MASK;
if (index == pool->index)
return -ENOBUFS;
}
pool->skb[index] = skb;
IDT77252_PRV_POOL(skb) = POOL_HANDLE(queue, index);
pool->index = (index + 1) & FBQ_MASK;
return 0;
}
static void
sb_pool_remove(struct idt77252_dev *card, struct sk_buff *skb)
{
unsigned int queue, index;
u32 handle;
handle = IDT77252_PRV_POOL(skb);
queue = POOL_QUEUE(handle);
if (queue > 3)
return;
index = POOL_INDEX(handle);
if (index > FBQ_SIZE - 1)
return;
card->sbpool[queue].skb[index] = NULL;
}
static struct sk_buff *
sb_pool_skb(struct idt77252_dev *card, u32 handle)
{
unsigned int queue, index;
queue = POOL_QUEUE(handle);
if (queue > 3)
return NULL;
index = POOL_INDEX(handle);
if (index > FBQ_SIZE - 1)
return NULL;
return card->sbpool[queue].skb[index];
}
static struct scq_info *
alloc_scq(struct idt77252_dev *card, int class)
{
struct scq_info *scq;
scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
if (!scq)
return NULL;
scq->base = pci_alloc_consistent(card->pcidev, SCQ_SIZE,
&scq->paddr);
if (scq->base == NULL) {
kfree(scq);
return NULL;
}
memset(scq->base, 0, SCQ_SIZE);
scq->next = scq->base;
scq->last = scq->base + (SCQ_ENTRIES - 1);
atomic_set(&scq->used, 0);
spin_lock_init(&scq->lock);
spin_lock_init(&scq->skblock);
skb_queue_head_init(&scq->transmit);
skb_queue_head_init(&scq->pending);
TXPRINTK("idt77252: SCQ: base 0x%p, next 0x%p, last 0x%p, paddr %08llx\n",
scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
return scq;
}
static void
free_scq(struct idt77252_dev *card, struct scq_info *scq)
{
struct sk_buff *skb;
struct atm_vcc *vcc;
pci_free_consistent(card->pcidev, SCQ_SIZE,
scq->base, scq->paddr);
while ((skb = skb_dequeue(&scq->transmit))) {
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb->len, PCI_DMA_TODEVICE);
vcc = ATM_SKB(skb)->vcc;
if (vcc->pop)
vcc->pop(vcc, skb);
else
dev_kfree_skb(skb);
}
while ((skb = skb_dequeue(&scq->pending))) {
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb->len, PCI_DMA_TODEVICE);
vcc = ATM_SKB(skb)->vcc;
if (vcc->pop)
vcc->pop(vcc, skb);
else
dev_kfree_skb(skb);
}
kfree(scq);
}
static int
push_on_scq(struct idt77252_dev *card, struct vc_map *vc, struct sk_buff *skb)
{
struct scq_info *scq = vc->scq;
unsigned long flags;
struct scqe *tbd;
int entries;
TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
atomic_inc(&scq->used);
entries = atomic_read(&scq->used);
if (entries > (SCQ_ENTRIES - 1)) {
atomic_dec(&scq->used);
goto out;
}
skb_queue_tail(&scq->transmit, skb);
spin_lock_irqsave(&vc->lock, flags);
if (vc->estimator) {
struct atm_vcc *vcc = vc->tx_vcc;
struct sock *sk = sk_atm(vcc);
vc->estimator->cells += (skb->len + 47) / 48;
if (atomic_read(&sk->sk_wmem_alloc) >
(sk->sk_sndbuf >> 1)) {
u32 cps = vc->estimator->maxcps;
vc->estimator->cps = cps;
vc->estimator->avcps = cps << 5;
if (vc->lacr < vc->init_er) {
vc->lacr = vc->init_er;
writel(TCMDQ_LACR | (vc->lacr << 16) |
vc->index, SAR_REG_TCMDQ);
}
}
}
spin_unlock_irqrestore(&vc->lock, flags);
tbd = &IDT77252_PRV_TBD(skb);
spin_lock_irqsave(&scq->lock, flags);
scq->next->word_1 = cpu_to_le32(tbd->word_1 |
SAR_TBD_TSIF | SAR_TBD_GTSI);
scq->next->word_2 = cpu_to_le32(tbd->word_2);
scq->next->word_3 = cpu_to_le32(tbd->word_3);
scq->next->word_4 = cpu_to_le32(tbd->word_4);
if (scq->next == scq->last)
scq->next = scq->base;
else
scq->next++;
write_sram(card, scq->scd,
scq->paddr +
(u32)((unsigned long)scq->next - (unsigned long)scq->base));
spin_unlock_irqrestore(&scq->lock, flags);
scq->trans_start = jiffies;
if (test_and_clear_bit(VCF_IDLE, &vc->flags)) {
writel(TCMDQ_START_LACR | (vc->lacr << 16) | vc->index,
SAR_REG_TCMDQ);
}
TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
XPRINTK("%s: SCQ (after push %2d) head = 0x%x, next = 0x%p.\n",
card->name, atomic_read(&scq->used),
read_sram(card, scq->scd + 1), scq->next);
return 0;
out:
if (time_after(jiffies, scq->trans_start + HZ)) {
printk("%s: Error pushing TBD for %d.%d\n",
card->name, vc->tx_vcc->vpi, vc->tx_vcc->vci);
#ifdef CONFIG_ATM_IDT77252_DEBUG
idt77252_tx_dump(card);
#endif
scq->trans_start = jiffies;
}
return -ENOBUFS;
}
static void
drain_scq(struct idt77252_dev *card, struct vc_map *vc)
{
struct scq_info *scq = vc->scq;
struct sk_buff *skb;
struct atm_vcc *vcc;
TXPRINTK("%s: SCQ (before drain %2d) next = 0x%p.\n",
card->name, atomic_read(&scq->used), scq->next);
skb = skb_dequeue(&scq->transmit);
if (skb) {
TXPRINTK("%s: freeing skb at %p.\n", card->name, skb);
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb->len, PCI_DMA_TODEVICE);
vcc = ATM_SKB(skb)->vcc;
if (vcc->pop)
vcc->pop(vcc, skb);
else
dev_kfree_skb(skb);
atomic_inc(&vcc->stats->tx);
}
atomic_dec(&scq->used);
spin_lock(&scq->skblock);
while ((skb = skb_dequeue(&scq->pending))) {
if (push_on_scq(card, vc, skb)) {
skb_queue_head(&vc->scq->pending, skb);
break;
}
}
spin_unlock(&scq->skblock);
}
static int
queue_skb(struct idt77252_dev *card, struct vc_map *vc,
struct sk_buff *skb, int oam)
{
struct atm_vcc *vcc;
struct scqe *tbd;
unsigned long flags;
int error;
int aal;
if (skb->len == 0) {
printk("%s: invalid skb->len (%d)\n", card->name, skb->len);
return -EINVAL;
}
TXPRINTK("%s: Sending %d bytes of data.\n",
card->name, skb->len);
tbd = &IDT77252_PRV_TBD(skb);
vcc = ATM_SKB(skb)->vcc;
IDT77252_PRV_PADDR(skb) = pci_map_single(card->pcidev, skb->data,
skb->len, PCI_DMA_TODEVICE);
error = -EINVAL;
if (oam) {
if (skb->len != 52)
goto errout;
tbd->word_1 = SAR_TBD_OAM | ATM_CELL_PAYLOAD | SAR_TBD_EPDU;
tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
tbd->word_3 = 0x00000000;
tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
(skb->data[2] << 8) | (skb->data[3] << 0);
if (test_bit(VCF_RSV, &vc->flags))
vc = card->vcs[0];
goto done;
}
if (test_bit(VCF_RSV, &vc->flags)) {
printk("%s: Trying to transmit on reserved VC\n", card->name);
goto errout;
}
aal = vcc->qos.aal;
switch (aal) {
case ATM_AAL0:
case ATM_AAL34:
if (skb->len > 52)
goto errout;
if (aal == ATM_AAL0)
tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL0 |
ATM_CELL_PAYLOAD;
else
tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL34 |
ATM_CELL_PAYLOAD;
tbd->word_2 = IDT77252_PRV_PADDR(skb) + 4;
tbd->word_3 = 0x00000000;
tbd->word_4 = (skb->data[0] << 24) | (skb->data[1] << 16) |
(skb->data[2] << 8) | (skb->data[3] << 0);
break;
case ATM_AAL5:
tbd->word_1 = SAR_TBD_EPDU | SAR_TBD_AAL5 | skb->len;
tbd->word_2 = IDT77252_PRV_PADDR(skb);
tbd->word_3 = skb->len;
tbd->word_4 = (vcc->vpi << SAR_TBD_VPI_SHIFT) |
(vcc->vci << SAR_TBD_VCI_SHIFT);
break;
case ATM_AAL1:
case ATM_AAL2:
default:
printk("%s: Traffic type not supported.\n", card->name);
error = -EPROTONOSUPPORT;
goto errout;
}
done:
spin_lock_irqsave(&vc->scq->skblock, flags);
skb_queue_tail(&vc->scq->pending, skb);
while ((skb = skb_dequeue(&vc->scq->pending))) {
if (push_on_scq(card, vc, skb)) {
skb_queue_head(&vc->scq->pending, skb);
break;
}
}
spin_unlock_irqrestore(&vc->scq->skblock, flags);
return 0;
errout:
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb->len, PCI_DMA_TODEVICE);
return error;
}
static unsigned long
get_free_scd(struct idt77252_dev *card, struct vc_map *vc)
{
int i;
for (i = 0; i < card->scd_size; i++) {
if (!card->scd2vc[i]) {
card->scd2vc[i] = vc;
vc->scd_index = i;
return card->scd_base + i * SAR_SRAM_SCD_SIZE;
}
}
return 0;
}
static void
fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
{
write_sram(card, scq->scd, scq->paddr);
write_sram(card, scq->scd + 1, 0x00000000);
write_sram(card, scq->scd + 2, 0xffffffff);
write_sram(card, scq->scd + 3, 0x00000000);
}
static void
clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
{
return;
}
/*****************************************************************************/
/* */
/* RSQ Handling */
/* */
/*****************************************************************************/
static int
init_rsq(struct idt77252_dev *card)
{
struct rsq_entry *rsqe;
card->rsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
&card->rsq.paddr);
if (card->rsq.base == NULL) {
printk("%s: can't allocate RSQ.\n", card->name);
return -1;
}
memset(card->rsq.base, 0, RSQSIZE);
card->rsq.last = card->rsq.base + RSQ_NUM_ENTRIES - 1;
card->rsq.next = card->rsq.last;
for (rsqe = card->rsq.base; rsqe <= card->rsq.last; rsqe++)
rsqe->word_4 = 0;
writel((unsigned long) card->rsq.last - (unsigned long) card->rsq.base,
SAR_REG_RSQH);
writel(card->rsq.paddr, SAR_REG_RSQB);
IPRINTK("%s: RSQ base at 0x%lx (0x%x).\n", card->name,
(unsigned long) card->rsq.base,
readl(SAR_REG_RSQB));
IPRINTK("%s: RSQ head = 0x%x, base = 0x%x, tail = 0x%x.\n",
card->name,
readl(SAR_REG_RSQH),
readl(SAR_REG_RSQB),
readl(SAR_REG_RSQT));
return 0;
}
static void
deinit_rsq(struct idt77252_dev *card)
{
pci_free_consistent(card->pcidev, RSQSIZE,
card->rsq.base, card->rsq.paddr);
}
static void
dequeue_rx(struct idt77252_dev *card, struct rsq_entry *rsqe)
{
struct atm_vcc *vcc;
struct sk_buff *skb;
struct rx_pool *rpp;
struct vc_map *vc;
u32 header, vpi, vci;
u32 stat;
int i;
stat = le32_to_cpu(rsqe->word_4);
if (stat & SAR_RSQE_IDLE) {
RXPRINTK("%s: message about inactive connection.\n",
card->name);
return;
}
skb = sb_pool_skb(card, le32_to_cpu(rsqe->word_2));
if (skb == NULL) {
printk("%s: NULL skb in %s, rsqe: %08x %08x %08x %08x\n",
card->name, __func__,
le32_to_cpu(rsqe->word_1), le32_to_cpu(rsqe->word_2),
le32_to_cpu(rsqe->word_3), le32_to_cpu(rsqe->word_4));
return;
}
header = le32_to_cpu(rsqe->word_1);
vpi = (header >> 16) & 0x00ff;
vci = (header >> 0) & 0xffff;
RXPRINTK("%s: SDU for %d.%d received in buffer 0x%p (data 0x%p).\n",
card->name, vpi, vci, skb, skb->data);
if ((vpi >= (1 << card->vpibits)) || (vci != (vci & card->vcimask))) {
printk("%s: SDU received for out-of-range vc %u.%u\n",
card->name, vpi, vci);
recycle_rx_skb(card, skb);
return;
}
vc = card->vcs[VPCI2VC(card, vpi, vci)];
if (!vc || !test_bit(VCF_RX, &vc->flags)) {
printk("%s: SDU received on non RX vc %u.%u\n",
card->name, vpi, vci);
recycle_rx_skb(card, skb);
return;
}
vcc = vc->rx_vcc;
pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(skb),
skb_end_pointer(skb) - skb->data,
PCI_DMA_FROMDEVICE);
if ((vcc->qos.aal == ATM_AAL0) ||
(vcc->qos.aal == ATM_AAL34)) {
struct sk_buff *sb;
unsigned char *cell;
u32 aal0;
cell = skb->data;
for (i = (stat & SAR_RSQE_CELLCNT); i; i--) {
if ((sb = dev_alloc_skb(64)) == NULL) {
printk("%s: Can't allocate buffers for aal0.\n",
card->name);
atomic_add(i, &vcc->stats->rx_drop);
break;
}
if (!atm_charge(vcc, sb->truesize)) {
RXPRINTK("%s: atm_charge() dropped aal0 packets.\n",
card->name);
atomic_add(i - 1, &vcc->stats->rx_drop);
dev_kfree_skb(sb);
break;
}
aal0 = (vpi << ATM_HDR_VPI_SHIFT) |
(vci << ATM_HDR_VCI_SHIFT);
aal0 |= (stat & SAR_RSQE_EPDU) ? 0x00000002 : 0;
aal0 |= (stat & SAR_RSQE_CLP) ? 0x00000001 : 0;
*((u32 *) sb->data) = aal0;
skb_put(sb, sizeof(u32));
memcpy(skb_put(sb, ATM_CELL_PAYLOAD),
cell, ATM_CELL_PAYLOAD);
ATM_SKB(sb)->vcc = vcc;
__net_timestamp(sb);
vcc->push(vcc, sb);
atomic_inc(&vcc->stats->rx);
cell += ATM_CELL_PAYLOAD;
}
recycle_rx_skb(card, skb);
return;
}
if (vcc->qos.aal != ATM_AAL5) {
printk("%s: Unexpected AAL type in dequeue_rx(): %d.\n",
card->name, vcc->qos.aal);
recycle_rx_skb(card, skb);
return;
}
skb->len = (stat & SAR_RSQE_CELLCNT) * ATM_CELL_PAYLOAD;
rpp = &vc->rcv.rx_pool;
__skb_queue_tail(&rpp->queue, skb);
rpp->len += skb->len;
if (stat & SAR_RSQE_EPDU) {
unsigned char *l1l2;
unsigned int len;
l1l2 = (unsigned char *) ((unsigned long) skb->data + skb->len - 6);
len = (l1l2[0] << 8) | l1l2[1];
len = len ? len : 0x10000;
RXPRINTK("%s: PDU has %d bytes.\n", card->name, len);
if ((len + 8 > rpp->len) || (len + (47 + 8) < rpp->len)) {
RXPRINTK("%s: AAL5 PDU size mismatch: %d != %d. "
"(CDC: %08x)\n",
card->name, len, rpp->len, readl(SAR_REG_CDC));
recycle_rx_pool_skb(card, rpp);
atomic_inc(&vcc->stats->rx_err);
return;
}
if (stat & SAR_RSQE_CRC) {
RXPRINTK("%s: AAL5 CRC error.\n", card->name);
recycle_rx_pool_skb(card, rpp);
atomic_inc(&vcc->stats->rx_err);
return;
}
if (skb_queue_len(&rpp->queue) > 1) {
struct sk_buff *sb;
skb = dev_alloc_skb(rpp->len);
if (!skb) {
RXPRINTK("%s: Can't alloc RX skb.\n",
card->name);
recycle_rx_pool_skb(card, rpp);
atomic_inc(&vcc->stats->rx_err);
return;
}
if (!atm_charge(vcc, skb->truesize)) {
recycle_rx_pool_skb(card, rpp);
dev_kfree_skb(skb);
return;
}
skb_queue_walk(&rpp->queue, sb)
memcpy(skb_put(skb, sb->len),
sb->data, sb->len);
recycle_rx_pool_skb(card, rpp);
skb_trim(skb, len);
ATM_SKB(skb)->vcc = vcc;
__net_timestamp(skb);
vcc->push(vcc, skb);
atomic_inc(&vcc->stats->rx);
return;
}
flush_rx_pool(card, rpp);
if (!atm_charge(vcc, skb->truesize)) {
recycle_rx_skb(card, skb);
return;
}
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb_end_pointer(skb) - skb->data,
PCI_DMA_FROMDEVICE);
sb_pool_remove(card, skb);
skb_trim(skb, len);
ATM_SKB(skb)->vcc = vcc;
__net_timestamp(skb);
vcc->push(vcc, skb);
atomic_inc(&vcc->stats->rx);
if (skb->truesize > SAR_FB_SIZE_3)
add_rx_skb(card, 3, SAR_FB_SIZE_3, 1);
else if (skb->truesize > SAR_FB_SIZE_2)
add_rx_skb(card, 2, SAR_FB_SIZE_2, 1);
else if (skb->truesize > SAR_FB_SIZE_1)
add_rx_skb(card, 1, SAR_FB_SIZE_1, 1);
else
add_rx_skb(card, 0, SAR_FB_SIZE_0, 1);
return;
}
}
static void
idt77252_rx(struct idt77252_dev *card)
{
struct rsq_entry *rsqe;
if (card->rsq.next == card->rsq.last)
rsqe = card->rsq.base;
else
rsqe = card->rsq.next + 1;
if (!(le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID)) {
RXPRINTK("%s: no entry in RSQ.\n", card->name);
return;
}
do {
dequeue_rx(card, rsqe);
rsqe->word_4 = 0;
card->rsq.next = rsqe;
if (card->rsq.next == card->rsq.last)
rsqe = card->rsq.base;
else
rsqe = card->rsq.next + 1;
} while (le32_to_cpu(rsqe->word_4) & SAR_RSQE_VALID);
writel((unsigned long) card->rsq.next - (unsigned long) card->rsq.base,
SAR_REG_RSQH);
}
static void
idt77252_rx_raw(struct idt77252_dev *card)
{
struct sk_buff *queue;
u32 head, tail;
struct atm_vcc *vcc;
struct vc_map *vc;
struct sk_buff *sb;
if (card->raw_cell_head == NULL) {
u32 handle = le32_to_cpu(*(card->raw_cell_hnd + 1));
card->raw_cell_head = sb_pool_skb(card, handle);
}
queue = card->raw_cell_head;
if (!queue)
return;
head = IDT77252_PRV_PADDR(queue) + (queue->data - queue->head - 16);
tail = readl(SAR_REG_RAWCT);
pci_dma_sync_single_for_cpu(card->pcidev, IDT77252_PRV_PADDR(queue),
skb_end_pointer(queue) - queue->head - 16,
PCI_DMA_FROMDEVICE);
while (head != tail) {
unsigned int vpi, vci, pti;
u32 header;
header = le32_to_cpu(*(u32 *) &queue->data[0]);
vpi = (header & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT;
vci = (header & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT;
pti = (header & ATM_HDR_PTI_MASK) >> ATM_HDR_PTI_SHIFT;
#ifdef CONFIG_ATM_IDT77252_DEBUG
if (debug & DBG_RAW_CELL) {
int i;
printk("%s: raw cell %x.%02x.%04x.%x.%x\n",
card->name, (header >> 28) & 0x000f,
(header >> 20) & 0x00ff,
(header >> 4) & 0xffff,
(header >> 1) & 0x0007,
(header >> 0) & 0x0001);
for (i = 16; i < 64; i++)
printk(" %02x", queue->data[i]);
printk("\n");
}
#endif
if (vpi >= (1<<card->vpibits) || vci >= (1<<card->vcibits)) {
RPRINTK("%s: SDU received for out-of-range vc %u.%u\n",
card->name, vpi, vci);
goto drop;
}
vc = card->vcs[VPCI2VC(card, vpi, vci)];
if (!vc || !test_bit(VCF_RX, &vc->flags)) {
RPRINTK("%s: SDU received on non RX vc %u.%u\n",
card->name, vpi, vci);
goto drop;
}
vcc = vc->rx_vcc;
if (vcc->qos.aal != ATM_AAL0) {
RPRINTK("%s: raw cell for non AAL0 vc %u.%u\n",
card->name, vpi, vci);
atomic_inc(&vcc->stats->rx_drop);
goto drop;
}
if ((sb = dev_alloc_skb(64)) == NULL) {
printk("%s: Can't allocate buffers for AAL0.\n",
card->name);
atomic_inc(&vcc->stats->rx_err);
goto drop;
}
if (!atm_charge(vcc, sb->truesize)) {
RXPRINTK("%s: atm_charge() dropped AAL0 packets.\n",
card->name);
dev_kfree_skb(sb);
goto drop;
}
*((u32 *) sb->data) = header;
skb_put(sb, sizeof(u32));
memcpy(skb_put(sb, ATM_CELL_PAYLOAD), &(queue->data[16]),
ATM_CELL_PAYLOAD);
ATM_SKB(sb)->vcc = vcc;
__net_timestamp(sb);
vcc->push(vcc, sb);
atomic_inc(&vcc->stats->rx);
drop:
skb_pull(queue, 64);
head = IDT77252_PRV_PADDR(queue)
+ (queue->data - queue->head - 16);
if (queue->len < 128) {
struct sk_buff *next;
u32 handle;
head = le32_to_cpu(*(u32 *) &queue->data[0]);
handle = le32_to_cpu(*(u32 *) &queue->data[4]);
next = sb_pool_skb(card, handle);
recycle_rx_skb(card, queue);
if (next) {
card->raw_cell_head = next;
queue = card->raw_cell_head;
pci_dma_sync_single_for_cpu(card->pcidev,
IDT77252_PRV_PADDR(queue),
(skb_end_pointer(queue) -
queue->data),
PCI_DMA_FROMDEVICE);
} else {
card->raw_cell_head = NULL;
printk("%s: raw cell queue overrun\n",
card->name);
break;
}
}
}
}
/*****************************************************************************/
/* */
/* TSQ Handling */
/* */
/*****************************************************************************/
static int
init_tsq(struct idt77252_dev *card)
{
struct tsq_entry *tsqe;
card->tsq.base = pci_alloc_consistent(card->pcidev, RSQSIZE,
&card->tsq.paddr);
if (card->tsq.base == NULL) {
printk("%s: can't allocate TSQ.\n", card->name);
return -1;
}
memset(card->tsq.base, 0, TSQSIZE);
card->tsq.last = card->tsq.base + TSQ_NUM_ENTRIES - 1;
card->tsq.next = card->tsq.last;
for (tsqe = card->tsq.base; tsqe <= card->tsq.last; tsqe++)
tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
writel(card->tsq.paddr, SAR_REG_TSQB);
writel((unsigned long) card->tsq.next - (unsigned long) card->tsq.base,
SAR_REG_TSQH);
return 0;
}
static void
deinit_tsq(struct idt77252_dev *card)
{
pci_free_consistent(card->pcidev, TSQSIZE,
card->tsq.base, card->tsq.paddr);
}
static void
idt77252_tx(struct idt77252_dev *card)
{
struct tsq_entry *tsqe;
unsigned int vpi, vci;
struct vc_map *vc;
u32 conn, stat;
if (card->tsq.next == card->tsq.last)
tsqe = card->tsq.base;
else
tsqe = card->tsq.next + 1;
TXPRINTK("idt77252_tx: tsq %p: base %p, next %p, last %p\n", tsqe,
card->tsq.base, card->tsq.next, card->tsq.last);
TXPRINTK("idt77252_tx: tsqb %08x, tsqt %08x, tsqh %08x, \n",
readl(SAR_REG_TSQB),
readl(SAR_REG_TSQT),
readl(SAR_REG_TSQH));
stat = le32_to_cpu(tsqe->word_2);
if (stat & SAR_TSQE_INVALID)
return;
do {
TXPRINTK("tsqe: 0x%p [0x%08x 0x%08x]\n", tsqe,
le32_to_cpu(tsqe->word_1),
le32_to_cpu(tsqe->word_2));
switch (stat & SAR_TSQE_TYPE) {
case SAR_TSQE_TYPE_TIMER:
TXPRINTK("%s: Timer RollOver detected.\n", card->name);
break;
case SAR_TSQE_TYPE_IDLE:
conn = le32_to_cpu(tsqe->word_1);
if (SAR_TSQE_TAG(stat) == 0x10) {
#ifdef NOTDEF
printk("%s: Connection %d halted.\n",
card->name,
le32_to_cpu(tsqe->word_1) & 0x1fff);
#endif
break;
}
vc = card->vcs[conn & 0x1fff];
if (!vc) {
printk("%s: could not find VC from conn %d\n",
card->name, conn & 0x1fff);
break;
}
printk("%s: Connection %d IDLE.\n",
card->name, vc->index);
set_bit(VCF_IDLE, &vc->flags);
break;
case SAR_TSQE_TYPE_TSR:
conn = le32_to_cpu(tsqe->word_1);
vc = card->vcs[conn & 0x1fff];
if (!vc) {
printk("%s: no VC at index %d\n",
card->name,
le32_to_cpu(tsqe->word_1) & 0x1fff);
break;
}
drain_scq(card, vc);
break;
case SAR_TSQE_TYPE_TBD_COMP:
conn = le32_to_cpu(tsqe->word_1);
vpi = (conn >> SAR_TBD_VPI_SHIFT) & 0x00ff;
vci = (conn >> SAR_TBD_VCI_SHIFT) & 0xffff;
if (vpi >= (1 << card->vpibits) ||
vci >= (1 << card->vcibits)) {
printk("%s: TBD complete: "
"out of range VPI.VCI %u.%u\n",
card->name, vpi, vci);
break;
}
vc = card->vcs[VPCI2VC(card, vpi, vci)];
if (!vc) {
printk("%s: TBD complete: "
"no VC at VPI.VCI %u.%u\n",
card->name, vpi, vci);
break;
}
drain_scq(card, vc);
break;
}
tsqe->word_2 = cpu_to_le32(SAR_TSQE_INVALID);
card->tsq.next = tsqe;
if (card->tsq.next == card->tsq.last)
tsqe = card->tsq.base;
else
tsqe = card->tsq.next + 1;
TXPRINTK("tsqe: %p: base %p, next %p, last %p\n", tsqe,
card->tsq.base, card->tsq.next, card->tsq.last);
stat = le32_to_cpu(tsqe->word_2);
} while (!(stat & SAR_TSQE_INVALID));
writel((unsigned long)card->tsq.next - (unsigned long)card->tsq.base,
SAR_REG_TSQH);
XPRINTK("idt77252_tx-after writel%d: TSQ head = 0x%x, tail = 0x%x, next = 0x%p.\n",
card->index, readl(SAR_REG_TSQH),
readl(SAR_REG_TSQT), card->tsq.next);
}
static void
tst_timer(unsigned long data)
{
struct idt77252_dev *card = (struct idt77252_dev *)data;
unsigned long base, idle, jump;
unsigned long flags;
u32 pc;
int e;
spin_lock_irqsave(&card->tst_lock, flags);
base = card->tst[card->tst_index];
idle = card->tst[card->tst_index ^ 1];
if (test_bit(TST_SWITCH_WAIT, &card->tst_state)) {
jump = base + card->tst_size - 2;
pc = readl(SAR_REG_NOW) >> 2;
if ((pc ^ idle) & ~(card->tst_size - 1)) {
mod_timer(&card->tst_timer, jiffies + 1);
goto out;
}
clear_bit(TST_SWITCH_WAIT, &card->tst_state);
card->tst_index ^= 1;
write_sram(card, jump, TSTE_OPC_JMP | (base << 2));
base = card->tst[card->tst_index];
idle = card->tst[card->tst_index ^ 1];
for (e = 0; e < card->tst_size - 2; e++) {
if (card->soft_tst[e].tste & TSTE_PUSH_IDLE) {
write_sram(card, idle + e,
card->soft_tst[e].tste & TSTE_MASK);
card->soft_tst[e].tste &= ~(TSTE_PUSH_IDLE);
}
}
}
if (test_and_clear_bit(TST_SWITCH_PENDING, &card->tst_state)) {
for (e = 0; e < card->tst_size - 2; e++) {
if (card->soft_tst[e].tste & TSTE_PUSH_ACTIVE) {
write_sram(card, idle + e,
card->soft_tst[e].tste & TSTE_MASK);
card->soft_tst[e].tste &= ~(TSTE_PUSH_ACTIVE);
card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
}
}
jump = base + card->tst_size - 2;
write_sram(card, jump, TSTE_OPC_NULL);
set_bit(TST_SWITCH_WAIT, &card->tst_state);
mod_timer(&card->tst_timer, jiffies + 1);
}
out:
spin_unlock_irqrestore(&card->tst_lock, flags);
}
static int
__fill_tst(struct idt77252_dev *card, struct vc_map *vc,
int n, unsigned int opc)
{
unsigned long cl, avail;
unsigned long idle;
int e, r;
u32 data;
avail = card->tst_size - 2;
for (e = 0; e < avail; e++) {
if (card->soft_tst[e].vc == NULL)
break;
}
if (e >= avail) {
printk("%s: No free TST entries found\n", card->name);
return -1;
}
NPRINTK("%s: conn %d: first TST entry at %d.\n",
card->name, vc ? vc->index : -1, e);
r = n;
cl = avail;
data = opc & TSTE_OPC_MASK;
if (vc && (opc != TSTE_OPC_NULL))
data = opc | vc->index;
idle = card->tst[card->tst_index ^ 1];
/*
* Fill Soft TST.
*/
while (r > 0) {
if ((cl >= avail) && (card->soft_tst[e].vc == NULL)) {
if (vc)
card->soft_tst[e].vc = vc;
else
card->soft_tst[e].vc = (void *)-1;
card->soft_tst[e].tste = data;
if (timer_pending(&card->tst_timer))
card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
else {
write_sram(card, idle + e, data);
card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
}
cl -= card->tst_size;
r--;
}
if (++e == avail)
e = 0;
cl += n;
}
return 0;
}
static int
fill_tst(struct idt77252_dev *card, struct vc_map *vc, int n, unsigned int opc)
{
unsigned long flags;
int res;
spin_lock_irqsave(&card->tst_lock, flags);
res = __fill_tst(card, vc, n, opc);
set_bit(TST_SWITCH_PENDING, &card->tst_state);
if (!timer_pending(&card->tst_timer))
mod_timer(&card->tst_timer, jiffies + 1);
spin_unlock_irqrestore(&card->tst_lock, flags);
return res;
}
static int
__clear_tst(struct idt77252_dev *card, struct vc_map *vc)
{
unsigned long idle;
int e;
idle = card->tst[card->tst_index ^ 1];
for (e = 0; e < card->tst_size - 2; e++) {
if (card->soft_tst[e].vc == vc) {
card->soft_tst[e].vc = NULL;
card->soft_tst[e].tste = TSTE_OPC_VAR;
if (timer_pending(&card->tst_timer))
card->soft_tst[e].tste |= TSTE_PUSH_ACTIVE;
else {
write_sram(card, idle + e, TSTE_OPC_VAR);
card->soft_tst[e].tste |= TSTE_PUSH_IDLE;
}
}
}
return 0;
}
static int
clear_tst(struct idt77252_dev *card, struct vc_map *vc)
{
unsigned long flags;
int res;
spin_lock_irqsave(&card->tst_lock, flags);
res = __clear_tst(card, vc);
set_bit(TST_SWITCH_PENDING, &card->tst_state);
if (!timer_pending(&card->tst_timer))
mod_timer(&card->tst_timer, jiffies + 1);
spin_unlock_irqrestore(&card->tst_lock, flags);
return res;
}
static int
change_tst(struct idt77252_dev *card, struct vc_map *vc,
int n, unsigned int opc)
{
unsigned long flags;
int res;
spin_lock_irqsave(&card->tst_lock, flags);
__clear_tst(card, vc);
res = __fill_tst(card, vc, n, opc);
set_bit(TST_SWITCH_PENDING, &card->tst_state);
if (!timer_pending(&card->tst_timer))
mod_timer(&card->tst_timer, jiffies + 1);
spin_unlock_irqrestore(&card->tst_lock, flags);
return res;
}
static int
set_tct(struct idt77252_dev *card, struct vc_map *vc)
{
unsigned long tct;
tct = (unsigned long) (card->tct_base + vc->index * SAR_SRAM_TCT_SIZE);
switch (vc->class) {
case SCHED_CBR:
OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
card->name, tct, vc->scq->scd);
write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
write_sram(card, tct + 1, 0);
write_sram(card, tct + 2, 0);
write_sram(card, tct + 3, 0);
write_sram(card, tct + 4, 0);
write_sram(card, tct + 5, 0);
write_sram(card, tct + 6, 0);
write_sram(card, tct + 7, 0);
break;
case SCHED_UBR:
OPRINTK("%s: writing TCT at 0x%lx, SCD 0x%lx.\n",
card->name, tct, vc->scq->scd);
write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
write_sram(card, tct + 1, 0);
write_sram(card, tct + 2, TCT_TSIF);
write_sram(card, tct + 3, TCT_HALT | TCT_IDLE);
write_sram(card, tct + 4, 0);
write_sram(card, tct + 5, vc->init_er);
write_sram(card, tct + 6, 0);
write_sram(card, tct + 7, TCT_FLAG_UBR);
break;
case SCHED_VBR:
case SCHED_ABR:
default:
return -ENOSYS;
}
return 0;
}
/*****************************************************************************/
/* */
/* FBQ Handling */
/* */
/*****************************************************************************/
static __inline__ int
idt77252_fbq_level(struct idt77252_dev *card, int queue)
{
return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f;
}
static __inline__ int
idt77252_fbq_full(struct idt77252_dev *card, int queue)
{
return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f;
}
static int
push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue)
{
unsigned long flags;
u32 handle;
u32 addr;
skb->data = skb->head;
skb_reset_tail_pointer(skb);
skb->len = 0;
skb_reserve(skb, 16);
switch (queue) {
case 0:
skb_put(skb, SAR_FB_SIZE_0);
break;
case 1:
skb_put(skb, SAR_FB_SIZE_1);
break;
case 2:
skb_put(skb, SAR_FB_SIZE_2);
break;
case 3:
skb_put(skb, SAR_FB_SIZE_3);
break;
default:
return -1;
}
if (idt77252_fbq_full(card, queue))
return -1;
memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32));
handle = IDT77252_PRV_POOL(skb);
addr = IDT77252_PRV_PADDR(skb);
spin_lock_irqsave(&card->cmd_lock, flags);
writel(handle, card->fbq[queue]);
writel(addr, card->fbq[queue]);
spin_unlock_irqrestore(&card->cmd_lock, flags);
return 0;
}
static void
add_rx_skb(struct idt77252_dev *card, int queue,
unsigned int size, unsigned int count)
{
struct sk_buff *skb;
dma_addr_t paddr;
u32 handle;
while (count--) {
skb = dev_alloc_skb(size);
if (!skb)
return;
if (sb_pool_add(card, skb, queue)) {
printk("%s: SB POOL full\n", __func__);
goto outfree;
}
paddr = pci_map_single(card->pcidev, skb->data,
skb_end_pointer(skb) - skb->data,
PCI_DMA_FROMDEVICE);
IDT77252_PRV_PADDR(skb) = paddr;
if (push_rx_skb(card, skb, queue)) {
printk("%s: FB QUEUE full\n", __func__);
goto outunmap;
}
}
return;
outunmap:
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb_end_pointer(skb) - skb->data, PCI_DMA_FROMDEVICE);
handle = IDT77252_PRV_POOL(skb);
card->sbpool[POOL_QUEUE(handle)].skb[POOL_INDEX(handle)] = NULL;
outfree:
dev_kfree_skb(skb);
}
static void
recycle_rx_skb(struct idt77252_dev *card, struct sk_buff *skb)
{
u32 handle = IDT77252_PRV_POOL(skb);
int err;
pci_dma_sync_single_for_device(card->pcidev, IDT77252_PRV_PADDR(skb),
skb_end_pointer(skb) - skb->data,
PCI_DMA_FROMDEVICE);
err = push_rx_skb(card, skb, POOL_QUEUE(handle));
if (err) {
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb_end_pointer(skb) - skb->data,
PCI_DMA_FROMDEVICE);
sb_pool_remove(card, skb);
dev_kfree_skb(skb);
}
}
static void
flush_rx_pool(struct idt77252_dev *card, struct rx_pool *rpp)
{
skb_queue_head_init(&rpp->queue);
rpp->len = 0;
}
static void
recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
{
struct sk_buff *skb, *tmp;
skb_queue_walk_safe(&rpp->queue, skb, tmp)
recycle_rx_skb(card, skb);
flush_rx_pool(card, rpp);
}
/*****************************************************************************/
/* */
/* ATM Interface */
/* */
/*****************************************************************************/
static void
idt77252_phy_put(struct atm_dev *dev, unsigned char value, unsigned long addr)
{
write_utility(dev->dev_data, 0x100 + (addr & 0x1ff), value);
}
static unsigned char
idt77252_phy_get(struct atm_dev *dev, unsigned long addr)
{
return read_utility(dev->dev_data, 0x100 + (addr & 0x1ff));
}
static inline int
idt77252_send_skb(struct atm_vcc *vcc, struct sk_buff *skb, int oam)
{
struct atm_dev *dev = vcc->dev;
struct idt77252_dev *card = dev->dev_data;
struct vc_map *vc = vcc->dev_data;
int err;
if (vc == NULL) {
printk("%s: NULL connection in send().\n", card->name);
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
return -EINVAL;
}
if (!test_bit(VCF_TX, &vc->flags)) {
printk("%s: Trying to transmit on a non-tx VC.\n", card->name);
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
return -EINVAL;
}
switch (vcc->qos.aal) {
case ATM_AAL0:
case ATM_AAL1:
case ATM_AAL5:
break;
default:
printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
return -EINVAL;
}
if (skb_shinfo(skb)->nr_frags != 0) {
printk("%s: No scatter-gather yet.\n", card->name);
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
return -EINVAL;
}
ATM_SKB(skb)->vcc = vcc;
err = queue_skb(card, vc, skb, oam);
if (err) {
atomic_inc(&vcc->stats->tx_err);
dev_kfree_skb(skb);
return err;
}
return 0;
}
static int idt77252_send(struct atm_vcc *vcc, struct sk_buff *skb)
{
return idt77252_send_skb(vcc, skb, 0);
}
static int
idt77252_send_oam(struct atm_vcc *vcc, void *cell, int flags)
{
struct atm_dev *dev = vcc->dev;
struct idt77252_dev *card = dev->dev_data;
struct sk_buff *skb;
skb = dev_alloc_skb(64);
if (!skb) {
printk("%s: Out of memory in send_oam().\n", card->name);
atomic_inc(&vcc->stats->tx_err);
return -ENOMEM;
}
atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
memcpy(skb_put(skb, 52), cell, 52);
return idt77252_send_skb(vcc, skb, 1);
}
static __inline__ unsigned int
idt77252_fls(unsigned int x)
{
int r = 1;
if (x == 0)
return 0;
if (x & 0xffff0000) {
x >>= 16;
r += 16;
}
if (x & 0xff00) {
x >>= 8;
r += 8;
}
if (x & 0xf0) {
x >>= 4;
r += 4;
}
if (x & 0xc) {
x >>= 2;
r += 2;
}
if (x & 0x2)
r += 1;
return r;
}
static u16
idt77252_int_to_atmfp(unsigned int rate)
{
u16 m, e;
if (rate == 0)
return 0;
e = idt77252_fls(rate) - 1;
if (e < 9)
m = (rate - (1 << e)) << (9 - e);
else if (e == 9)
m = (rate - (1 << e));
else /* e > 9 */
m = (rate - (1 << e)) >> (e - 9);
return 0x4000 | (e << 9) | m;
}
static u8
idt77252_rate_logindex(struct idt77252_dev *card, int pcr)
{
u16 afp;
afp = idt77252_int_to_atmfp(pcr < 0 ? -pcr : pcr);
if (pcr < 0)
return rate_to_log[(afp >> 5) & 0x1ff];
return rate_to_log[((afp >> 5) + 1) & 0x1ff];
}
static void
idt77252_est_timer(unsigned long data)
{
struct vc_map *vc = (struct vc_map *)data;
struct idt77252_dev *card = vc->card;
struct rate_estimator *est;
unsigned long flags;
u32 rate, cps;
u64 ncells;
u8 lacr;
spin_lock_irqsave(&vc->lock, flags);
est = vc->estimator;
if (!est)
goto out;
ncells = est->cells;
rate = ((u32)(ncells - est->last_cells)) << (7 - est->interval);
est->last_cells = ncells;
est->avcps += ((long)rate - (long)est->avcps) >> est->ewma_log;
est->cps = (est->avcps + 0x1f) >> 5;
cps = est->cps;
if (cps < (est->maxcps >> 4))
cps = est->maxcps >> 4;
lacr = idt77252_rate_logindex(card, cps);
if (lacr > vc->max_er)
lacr = vc->max_er;
if (lacr != vc->lacr) {
vc->lacr = lacr;
writel(TCMDQ_LACR|(vc->lacr << 16)|vc->index, SAR_REG_TCMDQ);
}
est->timer.expires = jiffies + ((HZ / 4) << est->interval);
add_timer(&est->timer);
out:
spin_unlock_irqrestore(&vc->lock, flags);
}
static struct rate_estimator *
idt77252_init_est(struct vc_map *vc, int pcr)
{
struct rate_estimator *est;
est = kzalloc(sizeof(struct rate_estimator), GFP_KERNEL);
if (!est)
return NULL;
est->maxcps = pcr < 0 ? -pcr : pcr;
est->cps = est->maxcps;
est->avcps = est->cps << 5;
est->interval = 2; /* XXX: make this configurable */
est->ewma_log = 2; /* XXX: make this configurable */
init_timer(&est->timer);
est->timer.data = (unsigned long)vc;
est->timer.function = idt77252_est_timer;
est->timer.expires = jiffies + ((HZ / 4) << est->interval);
add_timer(&est->timer);
return est;
}
static int
idt77252_init_cbr(struct idt77252_dev *card, struct vc_map *vc,
struct atm_vcc *vcc, struct atm_qos *qos)
{
int tst_free, tst_used, tst_entries;
unsigned long tmpl, modl;
int tcr, tcra;
if ((qos->txtp.max_pcr == 0) &&
(qos->txtp.pcr == 0) && (qos->txtp.min_pcr == 0)) {
printk("%s: trying to open a CBR VC with cell rate = 0\n",
card->name);
return -EINVAL;
}
tst_used = 0;
tst_free = card->tst_free;
if (test_bit(VCF_TX, &vc->flags))
tst_used = vc->ntste;
tst_free += tst_used;
tcr = atm_pcr_goal(&qos->txtp);
tcra = tcr >= 0 ? tcr : -tcr;
TXPRINTK("%s: CBR target cell rate = %d\n", card->name, tcra);
tmpl = (unsigned long) tcra * ((unsigned long) card->tst_size - 2);
modl = tmpl % (unsigned long)card->utopia_pcr;
tst_entries = (int) (tmpl / card->utopia_pcr);
if (tcr > 0) {
if (modl > 0)
tst_entries++;
} else if (tcr == 0) {
tst_entries = tst_free - SAR_TST_RESERVED;
if (tst_entries <= 0) {
printk("%s: no CBR bandwidth free.\n", card->name);
return -ENOSR;
}
}
if (tst_entries == 0) {
printk("%s: selected CBR bandwidth < granularity.\n",
card->name);
return -EINVAL;
}
if (tst_entries > (tst_free - SAR_TST_RESERVED)) {
printk("%s: not enough CBR bandwidth free.\n", card->name);
return -ENOSR;
}
vc->ntste = tst_entries;
card->tst_free = tst_free - tst_entries;
if (test_bit(VCF_TX, &vc->flags)) {
if (tst_used == tst_entries)
return 0;
OPRINTK("%s: modify %d -> %d entries in TST.\n",
card->name, tst_used, tst_entries);
change_tst(card, vc, tst_entries, TSTE_OPC_CBR);
return 0;
}
OPRINTK("%s: setting %d entries in TST.\n", card->name, tst_entries);
fill_tst(card, vc, tst_entries, TSTE_OPC_CBR);
return 0;
}
static int
idt77252_init_ubr(struct idt77252_dev *card, struct vc_map *vc,
struct atm_vcc *vcc, struct atm_qos *qos)
{
unsigned long flags;
int tcr;
spin_lock_irqsave(&vc->lock, flags);
if (vc->estimator) {
del_timer(&vc->estimator->timer);
kfree(vc->estimator);
vc->estimator = NULL;
}
spin_unlock_irqrestore(&vc->lock, flags);
tcr = atm_pcr_goal(&qos->txtp);
if (tcr == 0)
tcr = card->link_pcr;
vc->estimator = idt77252_init_est(vc, tcr);
vc->class = SCHED_UBR;
vc->init_er = idt77252_rate_logindex(card, tcr);
vc->lacr = vc->init_er;
if (tcr < 0)
vc->max_er = vc->init_er;
else
vc->max_er = 0xff;
return 0;
}
static int
idt77252_init_tx(struct idt77252_dev *card, struct vc_map *vc,
struct atm_vcc *vcc, struct atm_qos *qos)
{
int error;
if (test_bit(VCF_TX, &vc->flags))
return -EBUSY;
switch (qos->txtp.traffic_class) {
case ATM_CBR:
vc->class = SCHED_CBR;
break;
case ATM_UBR:
vc->class = SCHED_UBR;
break;
case ATM_VBR:
case ATM_ABR:
default:
return -EPROTONOSUPPORT;
}
vc->scq = alloc_scq(card, vc->class);
if (!vc->scq) {
printk("%s: can't get SCQ.\n", card->name);
return -ENOMEM;
}
vc->scq->scd = get_free_scd(card, vc);
if (vc->scq->scd == 0) {
printk("%s: no SCD available.\n", card->name);
free_scq(card, vc->scq);
return -ENOMEM;
}
fill_scd(card, vc->scq, vc->class);
if (set_tct(card, vc)) {
printk("%s: class %d not supported.\n",
card->name, qos->txtp.traffic_class);
card->scd2vc[vc->scd_index] = NULL;
free_scq(card, vc->scq);
return -EPROTONOSUPPORT;
}
switch (vc->class) {
case SCHED_CBR:
error = idt77252_init_cbr(card, vc, vcc, qos);
if (error) {
card->scd2vc[vc->scd_index] = NULL;
free_scq(card, vc->scq);
return error;
}
clear_bit(VCF_IDLE, &vc->flags);
writel(TCMDQ_START | vc->index, SAR_REG_TCMDQ);
break;
case SCHED_UBR:
error = idt77252_init_ubr(card, vc, vcc, qos);
if (error) {
card->scd2vc[vc->scd_index] = NULL;
free_scq(card, vc->scq);
return error;
}
set_bit(VCF_IDLE, &vc->flags);
break;
}
vc->tx_vcc = vcc;
set_bit(VCF_TX, &vc->flags);
return 0;
}
static int
idt77252_init_rx(struct idt77252_dev *card, struct vc_map *vc,
struct atm_vcc *vcc, struct atm_qos *qos)
{
unsigned long flags;
unsigned long addr;
u32 rcte = 0;
if (test_bit(VCF_RX, &vc->flags))
return -EBUSY;
vc->rx_vcc = vcc;
set_bit(VCF_RX, &vc->flags);
if ((vcc->vci == 3) || (vcc->vci == 4))
return 0;
flush_rx_pool(card, &vc->rcv.rx_pool);
rcte |= SAR_RCTE_CONNECTOPEN;
rcte |= SAR_RCTE_RAWCELLINTEN;
switch (qos->aal) {
case ATM_AAL0:
rcte |= SAR_RCTE_RCQ;
break;
case ATM_AAL1:
rcte |= SAR_RCTE_OAM; /* Let SAR drop Video */
break;
case ATM_AAL34:
rcte |= SAR_RCTE_AAL34;
break;
case ATM_AAL5:
rcte |= SAR_RCTE_AAL5;
break;
default:
rcte |= SAR_RCTE_RCQ;
break;
}
if (qos->aal != ATM_AAL5)
rcte |= SAR_RCTE_FBP_1;
else if (qos->rxtp.max_sdu > SAR_FB_SIZE_2)
rcte |= SAR_RCTE_FBP_3;
else if (qos->rxtp.max_sdu > SAR_FB_SIZE_1)
rcte |= SAR_RCTE_FBP_2;
else if (qos->rxtp.max_sdu > SAR_FB_SIZE_0)
rcte |= SAR_RCTE_FBP_1;
else
rcte |= SAR_RCTE_FBP_01;
addr = card->rct_base + (vc->index << 2);
OPRINTK("%s: writing RCT at 0x%lx\n", card->name, addr);
write_sram(card, addr, rcte);
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_OPEN_CONNECTION | (addr << 2), SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
return 0;
}
static int
idt77252_open(struct atm_vcc *vcc)
{
struct atm_dev *dev = vcc->dev;
struct idt77252_dev *card = dev->dev_data;
struct vc_map *vc;
unsigned int index;
unsigned int inuse;
int error;
int vci = vcc->vci;
short vpi = vcc->vpi;
if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
return 0;
if (vpi >= (1 << card->vpibits)) {
printk("%s: unsupported VPI: %d\n", card->name, vpi);
return -EINVAL;
}
if (vci >= (1 << card->vcibits)) {
printk("%s: unsupported VCI: %d\n", card->name, vci);
return -EINVAL;
}
set_bit(ATM_VF_ADDR, &vcc->flags);
mutex_lock(&card->mutex);
OPRINTK("%s: opening vpi.vci: %d.%d\n", card->name, vpi, vci);
switch (vcc->qos.aal) {
case ATM_AAL0:
case ATM_AAL1:
case ATM_AAL5:
break;
default:
printk("%s: Unsupported AAL: %d\n", card->name, vcc->qos.aal);
mutex_unlock(&card->mutex);
return -EPROTONOSUPPORT;
}
index = VPCI2VC(card, vpi, vci);
if (!card->vcs[index]) {
card->vcs[index] = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
if (!card->vcs[index]) {
printk("%s: can't alloc vc in open()\n", card->name);
mutex_unlock(&card->mutex);
return -ENOMEM;
}
card->vcs[index]->card = card;
card->vcs[index]->index = index;
spin_lock_init(&card->vcs[index]->lock);
}
vc = card->vcs[index];
vcc->dev_data = vc;
IPRINTK("%s: idt77252_open: vc = %d (%d.%d) %s/%s (max RX SDU: %u)\n",
card->name, vc->index, vcc->vpi, vcc->vci,
vcc->qos.rxtp.traffic_class != ATM_NONE ? "rx" : "--",
vcc->qos.txtp.traffic_class != ATM_NONE ? "tx" : "--",
vcc->qos.rxtp.max_sdu);
inuse = 0;
if (vcc->qos.txtp.traffic_class != ATM_NONE &&
test_bit(VCF_TX, &vc->flags))
inuse = 1;
if (vcc->qos.rxtp.traffic_class != ATM_NONE &&
test_bit(VCF_RX, &vc->flags))
inuse += 2;
if (inuse) {
printk("%s: %s vci already in use.\n", card->name,
inuse == 1 ? "tx" : inuse == 2 ? "rx" : "tx and rx");
mutex_unlock(&card->mutex);
return -EADDRINUSE;
}
if (vcc->qos.txtp.traffic_class != ATM_NONE) {
error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
if (error) {
mutex_unlock(&card->mutex);
return error;
}
}
if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
if (error) {
mutex_unlock(&card->mutex);
return error;
}
}
set_bit(ATM_VF_READY, &vcc->flags);
mutex_unlock(&card->mutex);
return 0;
}
static void
idt77252_close(struct atm_vcc *vcc)
{
struct atm_dev *dev = vcc->dev;
struct idt77252_dev *card = dev->dev_data;
struct vc_map *vc = vcc->dev_data;
unsigned long flags;
unsigned long addr;
unsigned long timeout;
mutex_lock(&card->mutex);
IPRINTK("%s: idt77252_close: vc = %d (%d.%d)\n",
card->name, vc->index, vcc->vpi, vcc->vci);
clear_bit(ATM_VF_READY, &vcc->flags);
if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
spin_lock_irqsave(&vc->lock, flags);
clear_bit(VCF_RX, &vc->flags);
vc->rx_vcc = NULL;
spin_unlock_irqrestore(&vc->lock, flags);
if ((vcc->vci == 3) || (vcc->vci == 4))
goto done;
addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2), SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
DPRINTK("%s: closing a VC with pending rx buffers.\n",
card->name);
recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
}
}
done:
if (vcc->qos.txtp.traffic_class != ATM_NONE) {
spin_lock_irqsave(&vc->lock, flags);
clear_bit(VCF_TX, &vc->flags);
clear_bit(VCF_IDLE, &vc->flags);
clear_bit(VCF_RSV, &vc->flags);
vc->tx_vcc = NULL;
if (vc->estimator) {
del_timer(&vc->estimator->timer);
kfree(vc->estimator);
vc->estimator = NULL;
}
spin_unlock_irqrestore(&vc->lock, flags);
timeout = 5 * 1000;
while (atomic_read(&vc->scq->used) > 0) {
timeout = msleep_interruptible(timeout);
if (!timeout)
break;
}
if (!timeout)
printk("%s: SCQ drain timeout: %u used\n",
card->name, atomic_read(&vc->scq->used));
writel(TCMDQ_HALT | vc->index, SAR_REG_TCMDQ);
clear_scd(card, vc->scq, vc->class);
if (vc->class == SCHED_CBR) {
clear_tst(card, vc);
card->tst_free += vc->ntste;
vc->ntste = 0;
}
card->scd2vc[vc->scd_index] = NULL;
free_scq(card, vc->scq);
}
mutex_unlock(&card->mutex);
}
static int
idt77252_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flags)
{
struct atm_dev *dev = vcc->dev;
struct idt77252_dev *card = dev->dev_data;
struct vc_map *vc = vcc->dev_data;
int error = 0;
mutex_lock(&card->mutex);
if (qos->txtp.traffic_class != ATM_NONE) {
if (!test_bit(VCF_TX, &vc->flags)) {
error = idt77252_init_tx(card, vc, vcc, qos);
if (error)
goto out;
} else {
switch (qos->txtp.traffic_class) {
case ATM_CBR:
error = idt77252_init_cbr(card, vc, vcc, qos);
if (error)
goto out;
break;
case ATM_UBR:
error = idt77252_init_ubr(card, vc, vcc, qos);
if (error)
goto out;
if (!test_bit(VCF_IDLE, &vc->flags)) {
writel(TCMDQ_LACR | (vc->lacr << 16) |
vc->index, SAR_REG_TCMDQ);
}
break;
case ATM_VBR:
case ATM_ABR:
error = -EOPNOTSUPP;
goto out;
}
}
}
if ((qos->rxtp.traffic_class != ATM_NONE) &&
!test_bit(VCF_RX, &vc->flags)) {
error = idt77252_init_rx(card, vc, vcc, qos);
if (error)
goto out;
}
memcpy(&vcc->qos, qos, sizeof(struct atm_qos));
set_bit(ATM_VF_HASQOS, &vcc->flags);
out:
mutex_unlock(&card->mutex);
return error;
}
static int
idt77252_proc_read(struct atm_dev *dev, loff_t * pos, char *page)
{
struct idt77252_dev *card = dev->dev_data;
int i, left;
left = (int) *pos;
if (!left--)
return sprintf(page, "IDT77252 Interrupts:\n");
if (!left--)
return sprintf(page, "TSIF: %lu\n", card->irqstat[15]);
if (!left--)
return sprintf(page, "TXICP: %lu\n", card->irqstat[14]);
if (!left--)
return sprintf(page, "TSQF: %lu\n", card->irqstat[12]);
if (!left--)
return sprintf(page, "TMROF: %lu\n", card->irqstat[11]);
if (!left--)
return sprintf(page, "PHYI: %lu\n", card->irqstat[10]);
if (!left--)
return sprintf(page, "FBQ3A: %lu\n", card->irqstat[8]);
if (!left--)
return sprintf(page, "FBQ2A: %lu\n", card->irqstat[7]);
if (!left--)
return sprintf(page, "RSQF: %lu\n", card->irqstat[6]);
if (!left--)
return sprintf(page, "EPDU: %lu\n", card->irqstat[5]);
if (!left--)
return sprintf(page, "RAWCF: %lu\n", card->irqstat[4]);
if (!left--)
return sprintf(page, "FBQ1A: %lu\n", card->irqstat[3]);
if (!left--)
return sprintf(page, "FBQ0A: %lu\n", card->irqstat[2]);
if (!left--)
return sprintf(page, "RSQAF: %lu\n", card->irqstat[1]);
if (!left--)
return sprintf(page, "IDT77252 Transmit Connection Table:\n");
for (i = 0; i < card->tct_size; i++) {
unsigned long tct;
struct atm_vcc *vcc;
struct vc_map *vc;
char *p;
vc = card->vcs[i];
if (!vc)
continue;
vcc = NULL;
if (vc->tx_vcc)
vcc = vc->tx_vcc;
if (!vcc)
continue;
if (left--)
continue;
p = page;
p += sprintf(p, " %4u: %u.%u: ", i, vcc->vpi, vcc->vci);
tct = (unsigned long) (card->tct_base + i * SAR_SRAM_TCT_SIZE);
for (i = 0; i < 8; i++)
p += sprintf(p, " %08x", read_sram(card, tct + i));
p += sprintf(p, "\n");
return p - page;
}
return 0;
}
/*****************************************************************************/
/* */
/* Interrupt handler */
/* */
/*****************************************************************************/
static void
idt77252_collect_stat(struct idt77252_dev *card)
{
u32 cdc, vpec, icc;
cdc = readl(SAR_REG_CDC);
vpec = readl(SAR_REG_VPEC);
icc = readl(SAR_REG_ICC);
#ifdef NOTDEF
printk("%s:", card->name);
if (cdc & 0x7f0000) {
char *s = "";
printk(" [");
if (cdc & (1 << 22)) {
printk("%sRM ID", s);
s = " | ";
}
if (cdc & (1 << 21)) {
printk("%sCON TAB", s);
s = " | ";
}
if (cdc & (1 << 20)) {
printk("%sNO FB", s);
s = " | ";
}
if (cdc & (1 << 19)) {
printk("%sOAM CRC", s);
s = " | ";
}
if (cdc & (1 << 18)) {
printk("%sRM CRC", s);
s = " | ";
}
if (cdc & (1 << 17)) {
printk("%sRM FIFO", s);
s = " | ";
}
if (cdc & (1 << 16)) {
printk("%sRX FIFO", s);
s = " | ";
}
printk("]");
}
printk(" CDC %04x, VPEC %04x, ICC: %04x\n",
cdc & 0xffff, vpec & 0xffff, icc & 0xffff);
#endif
}
static irqreturn_t
idt77252_interrupt(int irq, void *dev_id)
{
struct idt77252_dev *card = dev_id;
u32 stat;
stat = readl(SAR_REG_STAT) & 0xffff;
if (!stat) /* no interrupt for us */
return IRQ_NONE;
if (test_and_set_bit(IDT77252_BIT_INTERRUPT, &card->flags)) {
printk("%s: Re-entering irq_handler()\n", card->name);
goto out;
}
writel(stat, SAR_REG_STAT); /* reset interrupt */
if (stat & SAR_STAT_TSIF) { /* entry written to TSQ */
INTPRINTK("%s: TSIF\n", card->name);
card->irqstat[15]++;
idt77252_tx(card);
}
if (stat & SAR_STAT_TXICP) { /* Incomplete CS-PDU has */
INTPRINTK("%s: TXICP\n", card->name);
card->irqstat[14]++;
#ifdef CONFIG_ATM_IDT77252_DEBUG
idt77252_tx_dump(card);
#endif
}
if (stat & SAR_STAT_TSQF) { /* TSQ 7/8 full */
INTPRINTK("%s: TSQF\n", card->name);
card->irqstat[12]++;
idt77252_tx(card);
}
if (stat & SAR_STAT_TMROF) { /* Timer overflow */
INTPRINTK("%s: TMROF\n", card->name);
card->irqstat[11]++;
idt77252_collect_stat(card);
}
if (stat & SAR_STAT_EPDU) { /* Got complete CS-PDU */
INTPRINTK("%s: EPDU\n", card->name);
card->irqstat[5]++;
idt77252_rx(card);
}
if (stat & SAR_STAT_RSQAF) { /* RSQ is 7/8 full */
INTPRINTK("%s: RSQAF\n", card->name);
card->irqstat[1]++;
idt77252_rx(card);
}
if (stat & SAR_STAT_RSQF) { /* RSQ is full */
INTPRINTK("%s: RSQF\n", card->name);
card->irqstat[6]++;
idt77252_rx(card);
}
if (stat & SAR_STAT_RAWCF) { /* Raw cell received */
INTPRINTK("%s: RAWCF\n", card->name);
card->irqstat[4]++;
idt77252_rx_raw(card);
}
if (stat & SAR_STAT_PHYI) { /* PHY device interrupt */
INTPRINTK("%s: PHYI", card->name);
card->irqstat[10]++;
if (card->atmdev->phy && card->atmdev->phy->interrupt)
card->atmdev->phy->interrupt(card->atmdev);
}
if (stat & (SAR_STAT_FBQ0A | SAR_STAT_FBQ1A |
SAR_STAT_FBQ2A | SAR_STAT_FBQ3A)) {
writel(readl(SAR_REG_CFG) & ~(SAR_CFG_FBIE), SAR_REG_CFG);
INTPRINTK("%s: FBQA: %04x\n", card->name, stat);
if (stat & SAR_STAT_FBQ0A)
card->irqstat[2]++;
if (stat & SAR_STAT_FBQ1A)
card->irqstat[3]++;
if (stat & SAR_STAT_FBQ2A)
card->irqstat[7]++;
if (stat & SAR_STAT_FBQ3A)
card->irqstat[8]++;
schedule_work(&card->tqueue);
}
out:
clear_bit(IDT77252_BIT_INTERRUPT, &card->flags);
return IRQ_HANDLED;
}
static void
idt77252_softint(struct work_struct *work)
{
struct idt77252_dev *card =
container_of(work, struct idt77252_dev, tqueue);
u32 stat;
int done;
for (done = 1; ; done = 1) {
stat = readl(SAR_REG_STAT) >> 16;
if ((stat & 0x0f) < SAR_FBQ0_HIGH) {
add_rx_skb(card, 0, SAR_FB_SIZE_0, 32);
done = 0;
}
stat >>= 4;
if ((stat & 0x0f) < SAR_FBQ1_HIGH) {
add_rx_skb(card, 1, SAR_FB_SIZE_1, 32);
done = 0;
}
stat >>= 4;
if ((stat & 0x0f) < SAR_FBQ2_HIGH) {
add_rx_skb(card, 2, SAR_FB_SIZE_2, 32);
done = 0;
}
stat >>= 4;
if ((stat & 0x0f) < SAR_FBQ3_HIGH) {
add_rx_skb(card, 3, SAR_FB_SIZE_3, 32);
done = 0;
}
if (done)
break;
}
writel(readl(SAR_REG_CFG) | SAR_CFG_FBIE, SAR_REG_CFG);
}
static int
open_card_oam(struct idt77252_dev *card)
{
unsigned long flags;
unsigned long addr;
struct vc_map *vc;
int vpi, vci;
int index;
u32 rcte;
for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
for (vci = 3; vci < 5; vci++) {
index = VPCI2VC(card, vpi, vci);
vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
if (!vc) {
printk("%s: can't alloc vc\n", card->name);
return -ENOMEM;
}
vc->index = index;
card->vcs[index] = vc;
flush_rx_pool(card, &vc->rcv.rx_pool);
rcte = SAR_RCTE_CONNECTOPEN |
SAR_RCTE_RAWCELLINTEN |
SAR_RCTE_RCQ |
SAR_RCTE_FBP_1;
addr = card->rct_base + (vc->index << 2);
write_sram(card, addr, rcte);
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_OPEN_CONNECTION | (addr << 2),
SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
}
}
return 0;
}
static void
close_card_oam(struct idt77252_dev *card)
{
unsigned long flags;
unsigned long addr;
struct vc_map *vc;
int vpi, vci;
int index;
for (vpi = 0; vpi < (1 << card->vpibits); vpi++) {
for (vci = 3; vci < 5; vci++) {
index = VPCI2VC(card, vpi, vci);
vc = card->vcs[index];
addr = card->rct_base + vc->index * SAR_SRAM_RCT_SIZE;
spin_lock_irqsave(&card->cmd_lock, flags);
writel(SAR_CMD_CLOSE_CONNECTION | (addr << 2),
SAR_REG_CMD);
waitfor_idle(card);
spin_unlock_irqrestore(&card->cmd_lock, flags);
if (skb_queue_len(&vc->rcv.rx_pool.queue) != 0) {
DPRINTK("%s: closing a VC "
"with pending rx buffers.\n",
card->name);
recycle_rx_pool_skb(card, &vc->rcv.rx_pool);
}
}
}
}
static int
open_card_ubr0(struct idt77252_dev *card)
{
struct vc_map *vc;
vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL);
if (!vc) {
printk("%s: can't alloc vc\n", card->name);
return -ENOMEM;
}
card->vcs[0] = vc;
vc->class = SCHED_UBR0;
vc->scq = alloc_scq(card, vc->class);
if (!vc->scq) {
printk("%s: can't get SCQ.\n", card->name);
return -ENOMEM;
}
card->scd2vc[0] = vc;
vc->scd_index = 0;
vc->scq->scd = card->scd_base;
fill_scd(card, vc->scq, vc->class);
write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base);
write_sram(card, card->tct_base + 1, 0);
write_sram(card, card->tct_base + 2, 0);
write_sram(card, card->tct_base + 3, 0);
write_sram(card, card->tct_base + 4, 0);
write_sram(card, card->tct_base + 5, 0);
write_sram(card, card->tct_base + 6, 0);
write_sram(card, card->tct_base + 7, TCT_FLAG_UBR);
clear_bit(VCF_IDLE, &vc->flags);
writel(TCMDQ_START | 0, SAR_REG_TCMDQ);
return 0;
}
static int
idt77252_dev_open(struct idt77252_dev *card)
{
u32 conf;
if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
printk("%s: SAR not yet initialized.\n", card->name);
return -1;
}
conf = SAR_CFG_RXPTH| /* enable receive path */
SAR_RX_DELAY | /* interrupt on complete PDU */
SAR_CFG_RAWIE | /* interrupt enable on raw cells */
SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
SAR_CFG_TMOIE | /* interrupt on timer overflow */
SAR_CFG_FBIE | /* interrupt on low free buffers */
SAR_CFG_TXEN | /* transmit operation enable */
SAR_CFG_TXINT | /* interrupt on transmit status */
SAR_CFG_TXUIE | /* interrupt on transmit underrun */
SAR_CFG_TXSFI | /* interrupt on TSQ almost full */
SAR_CFG_PHYIE /* enable PHY interrupts */
;
#ifdef CONFIG_ATM_IDT77252_RCV_ALL
/* Test RAW cell receive. */
conf |= SAR_CFG_VPECA;
#endif
writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
if (open_card_oam(card)) {
printk("%s: Error initializing OAM.\n", card->name);
return -1;
}
if (open_card_ubr0(card)) {
printk("%s: Error initializing UBR0.\n", card->name);
return -1;
}
IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name);
return 0;
}
static void idt77252_dev_close(struct atm_dev *dev)
{
struct idt77252_dev *card = dev->dev_data;
u32 conf;
close_card_oam(card);
conf = SAR_CFG_RXPTH | /* enable receive path */
SAR_RX_DELAY | /* interrupt on complete PDU */
SAR_CFG_RAWIE | /* interrupt enable on raw cells */
SAR_CFG_RQFIE | /* interrupt on RSQ almost full */
SAR_CFG_TMOIE | /* interrupt on timer overflow */
SAR_CFG_FBIE | /* interrupt on low free buffers */
SAR_CFG_TXEN | /* transmit operation enable */
SAR_CFG_TXINT | /* interrupt on transmit status */
SAR_CFG_TXUIE | /* interrupt on xmit underrun */
SAR_CFG_TXSFI /* interrupt on TSQ almost full */
;
writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG);
DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name);
}
/*****************************************************************************/
/* */
/* Initialisation and Deinitialization of IDT77252 */
/* */
/*****************************************************************************/
static void
deinit_card(struct idt77252_dev *card)
{
struct sk_buff *skb;
int i, j;
if (!test_bit(IDT77252_BIT_INIT, &card->flags)) {
printk("%s: SAR not yet initialized.\n", card->name);
return;
}
DIPRINTK("idt77252: deinitialize card %u\n", card->index);
writel(0, SAR_REG_CFG);
if (card->atmdev)
atm_dev_deregister(card->atmdev);
for (i = 0; i < 4; i++) {
for (j = 0; j < FBQ_SIZE; j++) {
skb = card->sbpool[i].skb[j];
if (skb) {
pci_unmap_single(card->pcidev,
IDT77252_PRV_PADDR(skb),
(skb_end_pointer(skb) -
skb->data),
PCI_DMA_FROMDEVICE);
card->sbpool[i].skb[j] = NULL;
dev_kfree_skb(skb);
}
}
}
vfree(card->soft_tst);
vfree(card->scd2vc);
vfree(card->vcs);
if (card->raw_cell_hnd) {
pci_free_consistent(card->pcidev, 2 * sizeof(u32),
card->raw_cell_hnd, card->raw_cell_paddr);
}
if (card->rsq.base) {
DIPRINTK("%s: Release RSQ ...\n", card->name);
deinit_rsq(card);
}
if (card->tsq.base) {
DIPRINTK("%s: Release TSQ ...\n", card->name);
deinit_tsq(card);
}
DIPRINTK("idt77252: Release IRQ.\n");
free_irq(card->pcidev->irq, card);
for (i = 0; i < 4; i++) {
if (card->fbq[i])
iounmap(card->fbq[i]);
}
if (card->membase)
iounmap(card->membase);
clear_bit(IDT77252_BIT_INIT, &card->flags);
DIPRINTK("%s: Card deinitialized.\n", card->name);
}
static void __devinit
init_sram(struct idt77252_dev *card)
{
int i;
for (i = 0; i < card->sramsize; i += 4)
write_sram(card, (i >> 2), 0);
/* set SRAM layout for THIS card */
if (card->sramsize == (512 * 1024)) {
card->tct_base = SAR_SRAM_TCT_128_BASE;
card->tct_size = (SAR_SRAM_TCT_128_TOP - card->tct_base + 1)
/ SAR_SRAM_TCT_SIZE;
card->rct_base = SAR_SRAM_RCT_128_BASE;
card->rct_size = (SAR_SRAM_RCT_128_TOP - card->rct_base + 1)
/ SAR_SRAM_RCT_SIZE;
card->rt_base = SAR_SRAM_RT_128_BASE;
card->scd_base = SAR_SRAM_SCD_128_BASE;
card->scd_size = (SAR_SRAM_SCD_128_TOP - card->scd_base + 1)
/ SAR_SRAM_SCD_SIZE;
card->tst[0] = SAR_SRAM_TST1_128_BASE;
card->tst[1] = SAR_SRAM_TST2_128_BASE;
card->tst_size = SAR_SRAM_TST1_128_TOP - card->tst[0] + 1;
card->abrst_base = SAR_SRAM_ABRSTD_128_BASE;
card->abrst_size = SAR_ABRSTD_SIZE_8K;
card->fifo_base = SAR_SRAM_FIFO_128_BASE;
card->fifo_size = SAR_RXFD_SIZE_32K;
} else {
card->tct_base = SAR_SRAM_TCT_32_BASE;
card->tct_size = (SAR_SRAM_TCT_32_TOP - card->tct_base + 1)
/ SAR_SRAM_TCT_SIZE;
card->rct_base = SAR_SRAM_RCT_32_BASE;
card->rct_size = (SAR_SRAM_RCT_32_TOP - card->rct_base + 1)
/ SAR_SRAM_RCT_SIZE;
card->rt_base = SAR_SRAM_RT_32_BASE;
card->scd_base = SAR_SRAM_SCD_32_BASE;
card->scd_size = (SAR_SRAM_SCD_32_TOP - card->scd_base + 1)
/ SAR_SRAM_SCD_SIZE;
card->tst[0] = SAR_SRAM_TST1_32_BASE;
card->tst[1] = SAR_SRAM_TST2_32_BASE;
card->tst_size = (SAR_SRAM_TST1_32_TOP - card->tst[0] + 1);
card->abrst_base = SAR_SRAM_ABRSTD_32_BASE;
card->abrst_size = SAR_ABRSTD_SIZE_1K;
card->fifo_base = SAR_SRAM_FIFO_32_BASE;
card->fifo_size = SAR_RXFD_SIZE_4K;
}
/* Initialize TCT */
for (i = 0; i < card->tct_size; i++) {
write_sram(card, i * SAR_SRAM_TCT_SIZE + 0, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 1, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 2, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 3, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 4, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 5, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 6, 0);
write_sram(card, i * SAR_SRAM_TCT_SIZE + 7, 0);
}
/* Initialize RCT */
for (i = 0; i < card->rct_size; i++) {
write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE,
(u32) SAR_RCTE_RAWCELLINTEN);
write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 1,
(u32) 0);
write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 2,
(u32) 0);
write_sram(card, card->rct_base + i * SAR_SRAM_RCT_SIZE + 3,
(u32) 0xffffffff);
}
writel((SAR_FBQ0_LOW << 28) | 0x00000000 | 0x00000000 |
(SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0);
writel((SAR_FBQ1_LOW << 28) | 0x00000000 | 0x00000000 |
(SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1);
writel((SAR_FBQ2_LOW << 28) | 0x00000000 | 0x00000000 |
(SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2);
writel((SAR_FBQ3_LOW << 28) | 0x00000000 | 0x00000000 |
(SAR_FB_SIZE_3 / 48), SAR_REG_FBQS3);
/* Initialize rate table */
for (i = 0; i < 256; i++) {
write_sram(card, card->rt_base + i, log_to_rate[i]);
}
for (i = 0; i < 128; i++) {
unsigned int tmp;
tmp = rate_to_log[(i << 2) + 0] << 0;
tmp |= rate_to_log[(i << 2) + 1] << 8;
tmp |= rate_to_log[(i << 2) + 2] << 16;
tmp |= rate_to_log[(i << 2) + 3] << 24;
write_sram(card, card->rt_base + 256 + i, tmp);
}
#if 0 /* Fill RDF and AIR tables. */
for (i = 0; i < 128; i++) {
unsigned int tmp;
tmp = RDF[0][(i << 1) + 0] << 16;
tmp |= RDF[0][(i << 1) + 1] << 0;
write_sram(card, card->rt_base + 512 + i, tmp);
}
for (i = 0; i < 128; i++) {
unsigned int tmp;
tmp = AIR[0][(i << 1) + 0] << 16;
tmp |= AIR[0][(i << 1) + 1] << 0;
write_sram(card, card->rt_base + 640 + i, tmp);
}
#endif
IPRINTK("%s: initialize rate table ...\n", card->name);
writel(card->rt_base << 2, SAR_REG_RTBL);
/* Initialize TSTs */
IPRINTK("%s: initialize TST ...\n", card->name);
card->tst_free = card->tst_size - 2; /* last two are jumps */
for (i = card->tst[0]; i < card->tst[0] + card->tst_size - 2; i++)
write_sram(card, i, TSTE_OPC_VAR);
write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
idt77252_sram_write_errors = 1;
write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
idt77252_sram_write_errors = 0;
for (i = card->tst[1]; i < card->tst[1] + card->tst_size - 2; i++)
write_sram(card, i, TSTE_OPC_VAR);
write_sram(card, i++, TSTE_OPC_JMP | (card->tst[1] << 2));
idt77252_sram_write_errors = 1;
write_sram(card, i++, TSTE_OPC_JMP | (card->tst[0] << 2));
idt77252_sram_write_errors = 0;
card->tst_index = 0;
writel(card->tst[0] << 2, SAR_REG_TSTB);
/* Initialize ABRSTD and Receive FIFO */
IPRINTK("%s: initialize ABRSTD ...\n", card->name);
writel(card->abrst_size | (card->abrst_base << 2),
SAR_REG_ABRSTD);
IPRINTK("%s: initialize receive fifo ...\n", card->name);
writel(card->fifo_size | (card->fifo_base << 2),
SAR_REG_RXFD);
IPRINTK("%s: SRAM initialization complete.\n", card->name);
}
static int __devinit
init_card(struct atm_dev *dev)
{
struct idt77252_dev *card = dev->dev_data;
struct pci_dev *pcidev = card->pcidev;
unsigned long tmpl, modl;
unsigned int linkrate, rsvdcr;
unsigned int tst_entries;
struct net_device *tmp;
char tname[10];
u32 size;
u_char pci_byte;
u32 conf;
int i, k;
if (test_bit(IDT77252_BIT_INIT, &card->flags)) {
printk("Error: SAR already initialized.\n");
return -1;
}
/*****************************************************************/
/* P C I C O N F I G U R A T I O N */
/*****************************************************************/
/* Set PCI Retry-Timeout and TRDY timeout */
IPRINTK("%s: Checking PCI retries.\n", card->name);
if (pci_read_config_byte(pcidev, 0x40, &pci_byte) != 0) {
printk("%s: can't read PCI retry timeout.\n", card->name);
deinit_card(card);
return -1;
}
if (pci_byte != 0) {
IPRINTK("%s: PCI retry timeout: %d, set to 0.\n",
card->name, pci_byte);
if (pci_write_config_byte(pcidev, 0x40, 0) != 0) {
printk("%s: can't set PCI retry timeout.\n",
card->name);
deinit_card(card);
return -1;
}
}
IPRINTK("%s: Checking PCI TRDY.\n", card->name);
if (pci_read_config_byte(pcidev, 0x41, &pci_byte) != 0) {
printk("%s: can't read PCI TRDY timeout.\n", card->name);
deinit_card(card);
return -1;
}
if (pci_byte != 0) {
IPRINTK("%s: PCI TRDY timeout: %d, set to 0.\n",
card->name, pci_byte);
if (pci_write_config_byte(pcidev, 0x41, 0) != 0) {
printk("%s: can't set PCI TRDY timeout.\n", card->name);
deinit_card(card);
return -1;
}
}
/* Reset Timer register */
if (readl(SAR_REG_STAT) & SAR_STAT_TMROF) {
printk("%s: resetting timer overflow.\n", card->name);
writel(SAR_STAT_TMROF, SAR_REG_STAT);
}
IPRINTK("%s: Request IRQ ... ", card->name);
if (request_irq(pcidev->irq, idt77252_interrupt, IRQF_SHARED,
card->name, card) != 0) {
printk("%s: can't allocate IRQ.\n", card->name);
deinit_card(card);
return -1;
}
IPRINTK("got %d.\n", pcidev->irq);
/*****************************************************************/
/* C H E C K A N D I N I T S R A M */
/*****************************************************************/
IPRINTK("%s: Initializing SRAM\n", card->name);
/* preset size of connecton table, so that init_sram() knows about it */
conf = SAR_CFG_TX_FIFO_SIZE_9 | /* Use maximum fifo size */
SAR_CFG_RXSTQ_SIZE_8k | /* Receive Status Queue is 8k */
SAR_CFG_IDLE_CLP | /* Set CLP on idle cells */
#ifndef ATM_IDT77252_SEND_IDLE
SAR_CFG_NO_IDLE | /* Do not send idle cells */
#endif
0;
if (card->sramsize == (512 * 1024))
conf |= SAR_CFG_CNTBL_1k;
else
conf |= SAR_CFG_CNTBL_512;
switch (vpibits) {
case 0:
conf |= SAR_CFG_VPVCS_0;
break;
default:
case 1:
conf |= SAR_CFG_VPVCS_1;
break;
case 2:
conf |= SAR_CFG_VPVCS_2;
break;
case 8:
conf |= SAR_CFG_VPVCS_8;
break;
}
writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG);
init_sram(card);
/********************************************************************/
/* A L L O C R A M A N D S E T V A R I O U S T H I N G S */
/********************************************************************/
/* Initialize TSQ */
if (0 != init_tsq(card)) {
deinit_card(card);
return -1;
}
/* Initialize RSQ */
if (0 != init_rsq(card)) {
deinit_card(card);
return -1;
}
card->vpibits = vpibits;
if (card->sramsize == (512 * 1024)) {
card->vcibits = 10 - card->vpibits;
} else {
card->vcibits = 9 - card->vpibits;
}
card->vcimask = 0;
for (k = 0, i = 1; k < card->vcibits; k++) {
card->vcimask |= i;
i <<= 1;
}
IPRINTK("%s: Setting VPI/VCI mask to zero.\n", card->name);
writel(0, SAR_REG_VPM);
/* Little Endian Order */
writel(0, SAR_REG_GP);
/* Initialize RAW Cell Handle Register */
card->raw_cell_hnd = pci_alloc_consistent(card->pcidev, 2 * sizeof(u32),
&card->raw_cell_paddr);
if (!card->raw_cell_hnd) {
printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
memset(card->raw_cell_hnd, 0, 2 * sizeof(u32));
writel(card->raw_cell_paddr, SAR_REG_RAWHND);
IPRINTK("%s: raw cell handle is at 0x%p.\n", card->name,
card->raw_cell_hnd);
size = sizeof(struct vc_map *) * card->tct_size;
IPRINTK("%s: allocate %d byte for VC map.\n", card->name, size);
if (NULL == (card->vcs = vmalloc(size))) {
printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
memset(card->vcs, 0, size);
size = sizeof(struct vc_map *) * card->scd_size;
IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n",
card->name, size);
if (NULL == (card->scd2vc = vmalloc(size))) {
printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
memset(card->scd2vc, 0, size);
size = sizeof(struct tst_info) * (card->tst_size - 2);
IPRINTK("%s: allocate %d byte for TST to VC mapping.\n",
card->name, size);
if (NULL == (card->soft_tst = vmalloc(size))) {
printk("%s: memory allocation failure.\n", card->name);
deinit_card(card);
return -1;
}
for (i = 0; i < card->tst_size - 2; i++) {
card->soft_tst[i].tste = TSTE_OPC_VAR;
card->soft_tst[i].vc = NULL;
}
if (dev->phy == NULL) {
printk("%s: No LT device defined.\n", card->name);
deinit_card(card);
return -1;
}
if (dev->phy->ioctl == NULL) {
printk("%s: LT had no IOCTL funtion defined.\n", card->name);
deinit_card(card);
return -1;
}
#ifdef CONFIG_ATM_IDT77252_USE_SUNI
/*
* this is a jhs hack to get around special functionality in the
* phy driver for the atecom hardware; the functionality doesn't
* exist in the linux atm suni driver
*
* it isn't the right way to do things, but as the guy from NIST
* said, talking about their measurement of the fine structure
* constant, "it's good enough for government work."
*/
linkrate = 149760000;
#endif
card->link_pcr = (linkrate / 8 / 53);
printk("%s: Linkrate on ATM line : %u bit/s, %u cell/s.\n",
card->name, linkrate, card->link_pcr);
#ifdef ATM_IDT77252_SEND_IDLE
card->utopia_pcr = card->link_pcr;
#else
card->utopia_pcr = (160000000 / 8 / 54);
#endif
rsvdcr = 0;
if (card->utopia_pcr > card->link_pcr)
rsvdcr = card->utopia_pcr - card->link_pcr;
tmpl = (unsigned long) rsvdcr * ((unsigned long) card->tst_size - 2);
modl = tmpl % (unsigned long)card->utopia_pcr;
tst_entries = (int) (tmpl / (unsigned long)card->utopia_pcr);
if (modl)
tst_entries++;
card->tst_free -= tst_entries;
fill_tst(card, NULL, tst_entries, TSTE_OPC_NULL);
#ifdef HAVE_EEPROM
idt77252_eeprom_init(card);
printk("%s: EEPROM: %02x:", card->name,
idt77252_eeprom_read_status(card));
for (i = 0; i < 0x80; i++) {
printk(" %02x",
idt77252_eeprom_read_byte(card, i)
);
}
printk("\n");
#endif /* HAVE_EEPROM */
/*
* XXX: <hack>
*/
sprintf(tname, "eth%d", card->index);
tmp = dev_get_by_name(&init_net, tname); /* jhs: was "tmp = dev_get(tname);" */
if (tmp) {
memcpy(card->atmdev->esi, tmp->dev_addr, 6);
printk("%s: ESI %pM\n", card->name, card->atmdev->esi);
}
/*
* XXX: </hack>
*/
/* Set Maximum Deficit Count for now. */
writel(0xffff, SAR_REG_MDFCT);
set_bit(IDT77252_BIT_INIT, &card->flags);
XPRINTK("%s: IDT77252 ABR SAR initialization complete.\n", card->name);
return 0;
}
/*****************************************************************************/
/* */
/* Probing of IDT77252 ABR SAR */
/* */
/*****************************************************************************/
static int __devinit
idt77252_preset(struct idt77252_dev *card)
{
u16 pci_command;
/*****************************************************************/
/* P C I C O N F I G U R A T I O N */
/*****************************************************************/
XPRINTK("%s: Enable PCI master and memory access for SAR.\n",
card->name);
if (pci_read_config_word(card->pcidev, PCI_COMMAND, &pci_command)) {
printk("%s: can't read PCI_COMMAND.\n", card->name);
deinit_card(card);
return -1;
}
if (!(pci_command & PCI_COMMAND_IO)) {
printk("%s: PCI_COMMAND: %04x (???)\n",
card->name, pci_command);
deinit_card(card);
return (-1);
}
pci_command |= (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
if (pci_write_config_word(card->pcidev, PCI_COMMAND, pci_command)) {
printk("%s: can't write PCI_COMMAND.\n", card->name);
deinit_card(card);
return -1;
}
/*****************************************************************/
/* G E N E R I C R E S E T */
/*****************************************************************/
/* Software reset */
writel(SAR_CFG_SWRST, SAR_REG_CFG);
mdelay(1);
writel(0, SAR_REG_CFG);
IPRINTK("%s: Software resetted.\n", card->name);
return 0;
}
static unsigned long __devinit
probe_sram(struct idt77252_dev *card)
{
u32 data, addr;
writel(0, SAR_REG_DR0);
writel(SAR_CMD_WRITE_SRAM | (0 << 2), SAR_REG_CMD);
for (addr = 0x4000; addr < 0x80000; addr += 0x4000) {
writel(ATM_POISON, SAR_REG_DR0);
writel(SAR_CMD_WRITE_SRAM | (addr << 2), SAR_REG_CMD);
writel(SAR_CMD_READ_SRAM | (0 << 2), SAR_REG_CMD);
data = readl(SAR_REG_DR0);
if (data != 0)
break;
}
return addr * sizeof(u32);
}
static int __devinit
idt77252_init_one(struct pci_dev *pcidev, const struct pci_device_id *id)
{
static struct idt77252_dev **last = &idt77252_chain;
static int index = 0;
unsigned long membase, srambase;
struct idt77252_dev *card;
struct atm_dev *dev;
int i, err;
if ((err = pci_enable_device(pcidev))) {
printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
return err;
}
card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL);
if (!card) {
printk("idt77252-%d: can't allocate private data\n", index);
err = -ENOMEM;
goto err_out_disable_pdev;
}
card->revision = pcidev->revision;
card->index = index;
card->pcidev = pcidev;
sprintf(card->name, "idt77252-%d", card->index);
INIT_WORK(&card->tqueue, idt77252_softint);
membase = pci_resource_start(pcidev, 1);
srambase = pci_resource_start(pcidev, 2);
mutex_init(&card->mutex);
spin_lock_init(&card->cmd_lock);
spin_lock_init(&card->tst_lock);
init_timer(&card->tst_timer);
card->tst_timer.data = (unsigned long)card;
card->tst_timer.function = tst_timer;
/* Do the I/O remapping... */
card->membase = ioremap(membase, 1024);
if (!card->membase) {
printk("%s: can't ioremap() membase\n", card->name);
err = -EIO;
goto err_out_free_card;
}
if (idt77252_preset(card)) {
printk("%s: preset failed\n", card->name);
err = -EIO;
goto err_out_iounmap;
}
dev = atm_dev_register("idt77252", &idt77252_ops, -1, NULL);
if (!dev) {
printk("%s: can't register atm device\n", card->name);
err = -EIO;
goto err_out_iounmap;
}
dev->dev_data = card;
card->atmdev = dev;
#ifdef CONFIG_ATM_IDT77252_USE_SUNI
suni_init(dev);
if (!dev->phy) {
printk("%s: can't init SUNI\n", card->name);
err = -EIO;
goto err_out_deinit_card;
}
#endif /* CONFIG_ATM_IDT77252_USE_SUNI */
card->sramsize = probe_sram(card);
for (i = 0; i < 4; i++) {
card->fbq[i] = ioremap(srambase | 0x200000 | (i << 18), 4);
if (!card->fbq[i]) {
printk("%s: can't ioremap() FBQ%d\n", card->name, i);
err = -EIO;
goto err_out_deinit_card;
}
}
printk("%s: ABR SAR (Rev %c): MEM %08lx SRAM %08lx [%u KB]\n",
card->name, ((card->revision > 1) && (card->revision < 25)) ?
'A' + card->revision - 1 : '?', membase, srambase,
card->sramsize / 1024);
if (init_card(dev)) {
printk("%s: init_card failed\n", card->name);
err = -EIO;
goto err_out_deinit_card;
}
dev->ci_range.vpi_bits = card->vpibits;
dev->ci_range.vci_bits = card->vcibits;
dev->link_rate = card->link_pcr;
if (dev->phy->start)
dev->phy->start(dev);
if (idt77252_dev_open(card)) {
printk("%s: dev_open failed\n", card->name);
err = -EIO;
goto err_out_stop;
}
*last = card;
last = &card->next;
index++;
return 0;
err_out_stop:
if (dev->phy->stop)
dev->phy->stop(dev);
err_out_deinit_card:
deinit_card(card);
err_out_iounmap:
iounmap(card->membase);
err_out_free_card:
kfree(card);
err_out_disable_pdev:
pci_disable_device(pcidev);
return err;
}
static struct pci_device_id idt77252_pci_tbl[] =
{
{ PCI_VDEVICE(IDT, PCI_DEVICE_ID_IDT_IDT77252), 0 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, idt77252_pci_tbl);
static struct pci_driver idt77252_driver = {
.name = "idt77252",
.id_table = idt77252_pci_tbl,
.probe = idt77252_init_one,
};
static int __init idt77252_init(void)
{
struct sk_buff *skb;
printk("%s: at %p\n", __func__, idt77252_init);
if (sizeof(skb->cb) < sizeof(struct atm_skb_data) +
sizeof(struct idt77252_skb_prv)) {
printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n",
__func__, (unsigned long) sizeof(skb->cb),
(unsigned long) sizeof(struct atm_skb_data) +
sizeof(struct idt77252_skb_prv));
return -EIO;
}
return pci_register_driver(&idt77252_driver);
}
static void __exit idt77252_exit(void)
{
struct idt77252_dev *card;
struct atm_dev *dev;
pci_unregister_driver(&idt77252_driver);
while (idt77252_chain) {
card = idt77252_chain;
dev = card->atmdev;
idt77252_chain = card->next;
if (dev->phy->stop)
dev->phy->stop(dev);
deinit_card(card);
pci_disable_device(card->pcidev);
kfree(card);
}
DIPRINTK("idt77252: finished cleanup-module().\n");
}
module_init(idt77252_init);
module_exit(idt77252_exit);
MODULE_LICENSE("GPL");
module_param(vpibits, uint, 0);
MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)");
#ifdef CONFIG_ATM_IDT77252_DEBUG
module_param(debug, ulong, 0644);
MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h");
#endif
MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>");
MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
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