diff options
Diffstat (limited to 'drivers/atm/idt77252.c')
| -rw-r--r-- | drivers/atm/idt77252.c | 3791 |
1 files changed, 3791 insertions, 0 deletions
diff --git a/drivers/atm/idt77252.c b/drivers/atm/idt77252.c new file mode 100644 index 000000000..49cb45373 --- /dev/null +++ b/drivers/atm/idt77252.c @@ -0,0 +1,3791 @@ +/******************************************************************* + * + * 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/interrupt.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 <linux/uaccess.h> +#include <linux/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 const 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 = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE, + &scq->paddr, GFP_KERNEL); + if (scq->base == NULL) { + kfree(scq); + return NULL; + } + + 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; + + dma_free_coherent(&card->pcidev->dev, SCQ_SIZE, + scq->base, scq->paddr); + + while ((skb = skb_dequeue(&scq->transmit))) { + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb->len, DMA_TO_DEVICE); + + vcc = ATM_SKB(skb)->vcc; + if (vcc->pop) + vcc->pop(vcc, skb); + else + dev_kfree_skb(skb); + } + + while ((skb = skb_dequeue(&scq->pending))) { + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb->len, DMA_TO_DEVICE); + + 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 (refcount_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); + + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb->len, DMA_TO_DEVICE); + + 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; + u32 word4; + + 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; + word4 = (skb->data[0] << 24) | (skb->data[1] << 16) | + (skb->data[2] << 8) | (skb->data[3] << 0); + + IDT77252_PRV_PADDR(skb) = dma_map_single(&card->pcidev->dev, skb->data, + skb->len, DMA_TO_DEVICE); + + 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 = word4; + + 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 = word4; + 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: + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb->len, DMA_TO_DEVICE); + 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 = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE, + &card->rsq.paddr, GFP_KERNEL); + if (card->rsq.base == NULL) { + printk("%s: can't allocate RSQ.\n", card->name); + return -1; + } + + 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) +{ + dma_free_coherent(&card->pcidev->dev, 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; + + dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb_end_pointer(skb) - skb->data, + DMA_FROM_DEVICE); + + 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)); + skb_put_data(sb, 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) + skb_put_data(skb, 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; + } + + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb_end_pointer(skb) - skb->data, + DMA_FROM_DEVICE); + 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); + + dma_sync_single_for_cpu(&card->pcidev->dev, IDT77252_PRV_PADDR(queue), + skb_end_offset(queue) - 16, + DMA_FROM_DEVICE); + + while (head != tail) { + unsigned int vpi, vci; + 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; + +#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)); + skb_put_data(sb, &(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; + dma_sync_single_for_cpu(&card->pcidev->dev, + IDT77252_PRV_PADDR(queue), + (skb_end_pointer(queue) - + queue->data), + DMA_FROM_DEVICE); + } 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 = dma_alloc_coherent(&card->pcidev->dev, RSQSIZE, + &card->tsq.paddr, GFP_KERNEL); + if (card->tsq.base == NULL) { + printk("%s: can't allocate TSQ.\n", card->name); + return -1; + } + + 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) +{ + dma_free_coherent(&card->pcidev->dev, 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(struct timer_list *t) +{ + struct idt77252_dev *card = from_timer(card, t, tst_timer); + 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_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 = dma_map_single(&card->pcidev->dev, skb->data, + skb_end_pointer(skb) - skb->data, + DMA_FROM_DEVICE); + IDT77252_PRV_PADDR(skb) = paddr; + + if (push_rx_skb(card, skb, queue)) { + printk("%s: FB QUEUE full\n", __func__); + goto outunmap; + } + } + + return; + +outunmap: + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb_end_pointer(skb) - skb->data, DMA_FROM_DEVICE); + + 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; + + dma_sync_single_for_device(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb_end_pointer(skb) - skb->data, + DMA_FROM_DEVICE); + + err = push_rx_skb(card, skb, POOL_QUEUE(handle)); + if (err) { + dma_unmap_single(&card->pcidev->dev, IDT77252_PRV_PADDR(skb), + skb_end_pointer(skb) - skb->data, + DMA_FROM_DEVICE); + 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; + } + refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + + skb_put_data(skb, 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(struct timer_list *t) +{ + struct rate_estimator *est = from_timer(est, t, timer); + struct vc_map *vc = est->vc; + struct idt77252_dev *card = vc->card; + unsigned long flags; + u32 rate, cps; + u64 ncells; + u8 lacr; + + spin_lock_irqsave(&vc->lock, flags); + if (!vc->estimator) + 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->vc = vc; + + est->interval = 2; /* XXX: make this configurable */ + est->ewma_log = 2; /* XXX: make this configurable */ + timer_setup(&est->timer, idt77252_est_timer, 0); + mod_timer(&est->timer, jiffies + ((HZ / 4) << est->interval)); + + 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) +{ + struct rate_estimator *est = NULL; + unsigned long flags; + int tcr; + + spin_lock_irqsave(&vc->lock, flags); + if (vc->estimator) { + est = vc->estimator; + vc->estimator = NULL; + } + spin_unlock_irqrestore(&vc->lock, flags); + if (est) { + del_timer_sync(&est->timer); + kfree(est); + } + + 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) { + pr_warn("%s: SCQ drain timeout: %u used\n", + card->name, atomic_read(&vc->scq->used)); + break; + } + } + + 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) +{ + (void) readl(SAR_REG_CDC); + (void) readl(SAR_REG_VPEC); + (void) readl(SAR_REG_ICC); + +} + +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); + } + kfree(vc); + } + } +} + +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 void +close_card_ubr0(struct idt77252_dev *card) +{ + struct vc_map *vc = card->vcs[0]; + + free_scq(card, vc->scq); + kfree(vc); +} + +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_ubr0(card); + 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) { + dma_unmap_single(&card->pcidev->dev, + IDT77252_PRV_PADDR(skb), + (skb_end_pointer(skb) - + skb->data), + DMA_FROM_DEVICE); + 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) { + dma_free_coherent(&card->pcidev->dev, 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 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) | (SAR_FB_SIZE_0 / 48), SAR_REG_FBQS0); + writel((SAR_FBQ1_LOW << 28) | (SAR_FB_SIZE_1 / 48), SAR_REG_FBQS1); + writel((SAR_FBQ2_LOW << 28) | (SAR_FB_SIZE_2 / 48), SAR_REG_FBQS2); + writel((SAR_FBQ3_LOW << 28) | (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 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 = dma_alloc_coherent(&card->pcidev->dev, + 2 * sizeof(u32), + &card->raw_cell_paddr, + GFP_KERNEL); + if (!card->raw_cell_hnd) { + printk("%s: memory allocation failure.\n", card->name); + deinit_card(card); + return -1; + } + 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); + card->vcs = vzalloc(size); + if (!card->vcs) { + printk("%s: memory allocation failure.\n", card->name); + deinit_card(card); + return -1; + } + + size = sizeof(struct vc_map *) * card->scd_size; + IPRINTK("%s: allocate %d byte for SCD to VC mapping.\n", + card->name, size); + card->scd2vc = vzalloc(size); + if (!card->scd2vc) { + printk("%s: memory allocation failure.\n", card->name); + deinit_card(card); + return -1; + } + + size = sizeof(struct tst_info) * (card->tst_size - 2); + IPRINTK("%s: allocate %d byte for TST to VC mapping.\n", + card->name, size); + card->soft_tst = vmalloc(size); + if (!card->soft_tst) { + 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 function 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); + dev_put(tmp); + 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 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 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 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; + } + + if ((err = dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(32)))) { + printk("idt77252: can't enable DMA for PCI device at %s\n", pci_name(pcidev)); + 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 = 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); + + timer_setup(&card->tst_timer, tst_timer, 0); + + /* 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", &pcidev->dev, &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 const 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); + BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct idt77252_skb_prv) + sizeof(struct atm_skb_data)); + 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; + del_timer_sync(&card->tst_timer); + + 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"); |