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kernel-fxtec-pro1x/drivers/atm/idt77252.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*******************************************************************
* ident "$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $"
*
* $Author: ecd $
* $Date: 2001/11/11 08:13:54 $
*
* 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.
*
*******************************************************************/
static char const rcsid[] =
"$Id: idt77252.c,v 1.2 2001/11/11 08:13:54 ecd Exp $";
#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 <asm/semaphore.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 CONFIG_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(void *dev_id);
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 < sizeof(rdsrtab)/sizeof(rdsrtab[0]); 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 < sizeof(rdtab)/sizeof(rdtab[0]); 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 < sizeof(wrentab)/sizeof(wrentab[0]); i++) {
idt77252_write_gp(card, gp | wrentab[i]);
udelay(5);
}
idt77252_write_gp(card, gp | SAR_GP_EECS);
udelay(5);
for (i = 0; i < sizeof(wrtab)/sizeof(wrtab[0]); 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", __FUNCTION__);
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, __FUNCTION__,
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 - 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;
rpp->len += skb->len;
if (!rpp->count++)
rpp->first = skb;
*rpp->last = skb;
rpp->last = &skb->next;
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 (rpp->count > 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;
}
sb = rpp->first;
for (i = 0; i < rpp->count; i++) {
memcpy(skb_put(skb, sb->len),
sb->data, sb->len);
sb = sb->next;
}
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;
}
skb->next = NULL;
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 - 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),
queue->end - 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),
queue->end - 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->tail = skb->head;
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:
dev_kfree_skb(skb);
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", __FUNCTION__);
goto outfree;
}
paddr = pci_map_single(card->pcidev, skb->data,
skb->end - skb->data,
PCI_DMA_FROMDEVICE);
IDT77252_PRV_PADDR(skb) = paddr;
if (push_rx_skb(card, skb, queue)) {
printk("%s: FB QUEUE full\n", __FUNCTION__);
goto outunmap;
}
}
return;
outunmap:
pci_unmap_single(card->pcidev, IDT77252_PRV_PADDR(skb),
skb->end - 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 - 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 - 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)
{
rpp->len = 0;
rpp->count = 0;
rpp->first = NULL;
rpp->last = &rpp->first;
}
static void
recycle_rx_pool_skb(struct idt77252_dev *card, struct rx_pool *rpp)
{
struct sk_buff *skb, *next;
int i;
skb = rpp->first;
for (i = 0; i < rpp->count; i++) {
next = skb->next;
skb->next = NULL;
recycle_rx_skb(card, skb);
skb = next;
}
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;
}
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);
down(&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);
up(&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);
up(&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");
up(&card->mutex);
return -EADDRINUSE;
}
if (vcc->qos.txtp.traffic_class != ATM_NONE) {
error = idt77252_init_tx(card, vc, vcc, &vcc->qos);
if (error) {
up(&card->mutex);
return error;
}
}
if (vcc->qos.rxtp.traffic_class != ATM_NONE) {
error = idt77252_init_rx(card, vc, vcc, &vcc->qos);
if (error) {
up(&card->mutex);
return error;
}
}
set_bit(ATM_VF_READY, &vcc->flags);
up(&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;
down(&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 (vc->rcv.rx_pool.count) {
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);
}
up(&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;
down(&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:
up(&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(void *dev_id)
{
struct idt77252_dev *card = dev_id;
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 (vc->rcv.rx_pool.count) {
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;
}
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 - 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 int __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);
return 0;
}
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_DISABLED|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 CONFIG_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);
if (init_sram(card) < 0)
return -1;
/********************************************************************/
/* 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 CONFIG_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(tname); /* jhs: was "tmp = dev_get(tname);" */
if (tmp) {
memcpy(card->atmdev->esi, tmp->dev_addr, 6);
printk("%s: ESI %02x:%02x:%02x:%02x:%02x:%02x\n",
card->name, card->atmdev->esi[0], card->atmdev->esi[1],
card->atmdev->esi[2], card->atmdev->esi[3],
card->atmdev->esi[4], card->atmdev->esi[5]);
}
/*
* 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;
ushort revision = 0;
int i, err;
if ((err = pci_enable_device(pcidev))) {
printk("idt77252: can't enable PCI device at %s\n", pci_name(pcidev));
return err;
}
if (pci_read_config_word(pcidev, PCI_REVISION_ID, &revision)) {
printk("idt77252-%d: can't read PCI_REVISION_ID\n", index);
err = -ENODEV;
goto err_out_disable_pdev;
}
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 = revision;
card->index = index;
card->pcidev = pcidev;
sprintf(card->name, "idt77252-%d", card->index);
INIT_WORK(&card->tqueue, idt77252_softint, (void *)card);
membase = pci_resource_start(pcidev, 1);
srambase = pci_resource_start(pcidev, 2);
init_MUTEX(&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, ((revision > 1) && (revision < 25)) ?
'A' + 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_VENDOR_ID_IDT, PCI_DEVICE_ID_IDT_IDT77252,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 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", __FUNCTION__, 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",
__FUNCTION__, (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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