| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Torvalds | 18960 | 96.30% | 4 | 6.25% |
| Chas Williams | 181 | 0.92% | 9 | 14.06% |
| Björn Helgaas | 119 | 0.60% | 1 | 1.56% |
| Kees Cook | 74 | 0.38% | 2 | 3.12% |
| David S. Miller | 58 | 0.29% | 2 | 3.12% |
| Arnaldo Carvalho de Melo | 51 | 0.26% | 4 | 6.25% |
| Andrew Morton | 40 | 0.20% | 4 | 6.25% |
| Rusty Russell | 24 | 0.12% | 1 | 1.56% |
| Joe Perches | 23 | 0.12% | 1 | 1.56% |
| David Howells | 15 | 0.08% | 1 | 1.56% |
| Matthias Kaehlcke | 13 | 0.07% | 1 | 1.56% |
| Randy Dunlap | 12 | 0.06% | 2 | 3.12% |
| Jan Koniarik | 11 | 0.06% | 1 | 1.56% |
| Marcelo Feitoza Parisi | 8 | 0.04% | 1 | 1.56% |
| Jeff Garzik | 8 | 0.04% | 1 | 1.56% |
| Auke-Jan H Kok | 8 | 0.04% | 1 | 1.56% |
| Harvey Harrison | 6 | 0.03% | 1 | 1.56% |
| Om Narasimhan | 6 | 0.03% | 1 | 1.56% |
| Ingo Molnar | 6 | 0.03% | 1 | 1.56% |
| Ying Xue | 5 | 0.03% | 1 | 1.56% |
| Adrian Bunk | 5 | 0.03% | 2 | 3.12% |
| Peter Hüwe | 5 | 0.03% | 1 | 1.56% |
| Peter Senna Tschudin | 5 | 0.03% | 1 | 1.56% |
| Dan J Williams | 5 | 0.03% | 1 | 1.56% |
| Johannes Berg | 4 | 0.02% | 1 | 1.56% |
| Ahmed S. Darwish | 4 | 0.02% | 1 | 1.56% |
| Patrick McHardy | 4 | 0.02% | 1 | 1.56% |
| Robert P. J. Day | 3 | 0.02% | 1 | 1.56% |
| Tejun Heo | 3 | 0.02% | 1 | 1.56% |
| Alexey Dobriyan | 3 | 0.02% | 1 | 1.56% |
| Eric W. Biedermann | 3 | 0.02% | 1 | 1.56% |
| Luis R. Rodriguez | 3 | 0.02% | 1 | 1.56% |
| Elena Reshetova | 2 | 0.01% | 1 | 1.56% |
| Julia Lawall | 2 | 0.01% | 1 | 1.56% |
| Bhumika Goyal | 1 | 0.01% | 1 | 1.56% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 1.56% |
| Alexander Duyck | 1 | 0.01% | 1 | 1.56% |
| Thomas Gleixner | 1 | 0.01% | 1 | 1.56% |
| Al Viro | 1 | 0.01% | 1 | 1.56% |
| Lucas De Marchi | 1 | 0.01% | 1 | 1.56% |
| Arvind Yadav | 1 | 0.01% | 1 | 1.56% |
| Arun Sharma | 1 | 0.01% | 1 | 1.56% |
| H Hartley Sweeten | 1 | 0.01% | 1 | 1.56% |
| Total | 19688 | 64 |
/******************************************************************* * * 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; 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) = 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 = (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: 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_level(struct idt77252_dev *card, int queue) { return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) & 0x0f; } static __inline__ int idt77252_fbq_full(struct idt77252_dev *card, int queue) { return (readl(SAR_REG_STAT) >> (16 + (queue << 2))) == 0x0f; } static int push_rx_skb(struct idt77252_dev *card, struct sk_buff *skb, int queue) { unsigned long flags; u32 handle; u32 addr; skb->data = skb->head; skb_reset_tail_pointer(skb); skb->len = 0; skb_reserve(skb, 16); switch (queue) { case 0: skb_put(skb, SAR_FB_SIZE_0); break; case 1: skb_put(skb, SAR_FB_SIZE_1); break; case 2: skb_put(skb, SAR_FB_SIZE_2); break; case 3: skb_put(skb, SAR_FB_SIZE_3); break; default: return -1; } if (idt77252_fbq_full(card, queue)) return -1; memset(&skb->data[(skb->len & ~(0x3f)) - 64], 0, 2 * sizeof(u32)); handle = IDT77252_PRV_POOL(skb); addr = IDT77252_PRV_PADDR(skb); spin_lock_irqsave(&card->cmd_lock, flags); writel(handle, card->fbq[queue]); writel(addr, card->fbq[queue]); spin_unlock_irqrestore(&card->cmd_lock, flags); return 0; } static void add_rx_skb(struct idt77252_dev *card, int queue, unsigned int size, unsigned int count) { struct sk_buff *skb; dma_addr_t paddr; u32 handle; while (count--) { skb = dev_alloc_skb(size); if (!skb) return; if (sb_pool_add(card, skb, queue)) { printk("%s: SB POOL full\n", __func__); goto outfree; } paddr = 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); } } } } static int open_card_ubr0(struct idt77252_dev *card) { struct vc_map *vc; vc = kzalloc(sizeof(struct vc_map), GFP_KERNEL); if (!vc) { printk("%s: can't alloc vc\n", card->name); return -ENOMEM; } card->vcs[0] = vc; vc->class = SCHED_UBR0; vc->scq = alloc_scq(card, vc->class); if (!vc->scq) { printk("%s: can't get SCQ.\n", card->name); return -ENOMEM; } card->scd2vc[0] = vc; vc->scd_index = 0; vc->scq->scd = card->scd_base; fill_scd(card, vc->scq, vc->class); write_sram(card, card->tct_base + 0, TCT_UBR | card->scd_base); write_sram(card, card->tct_base + 1, 0); write_sram(card, card->tct_base + 2, 0); write_sram(card, card->tct_base + 3, 0); write_sram(card, card->tct_base + 4, 0); write_sram(card, card->tct_base + 5, 0); write_sram(card, card->tct_base + 6, 0); write_sram(card, card->tct_base + 7, TCT_FLAG_UBR); clear_bit(VCF_IDLE, &vc->flags); writel(TCMDQ_START | 0, SAR_REG_TCMDQ); return 0; } static int idt77252_dev_open(struct idt77252_dev *card) { u32 conf; if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { printk("%s: SAR not yet initialized.\n", card->name); return -1; } conf = SAR_CFG_RXPTH| /* enable receive path */ SAR_RX_DELAY | /* interrupt on complete PDU */ SAR_CFG_RAWIE | /* interrupt enable on raw cells */ SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ SAR_CFG_TMOIE | /* interrupt on timer overflow */ SAR_CFG_FBIE | /* interrupt on low free buffers */ SAR_CFG_TXEN | /* transmit operation enable */ SAR_CFG_TXINT | /* interrupt on transmit status */ SAR_CFG_TXUIE | /* interrupt on transmit underrun */ SAR_CFG_TXSFI | /* interrupt on TSQ almost full */ SAR_CFG_PHYIE /* enable PHY interrupts */ ; #ifdef CONFIG_ATM_IDT77252_RCV_ALL /* Test RAW cell receive. */ conf |= SAR_CFG_VPECA; #endif writel(readl(SAR_REG_CFG) | conf, SAR_REG_CFG); if (open_card_oam(card)) { printk("%s: Error initializing OAM.\n", card->name); return -1; } if (open_card_ubr0(card)) { printk("%s: Error initializing UBR0.\n", card->name); return -1; } IPRINTK("%s: opened IDT77252 ABR SAR.\n", card->name); return 0; } static void idt77252_dev_close(struct atm_dev *dev) { struct idt77252_dev *card = dev->dev_data; u32 conf; close_card_oam(card); conf = SAR_CFG_RXPTH | /* enable receive path */ SAR_RX_DELAY | /* interrupt on complete PDU */ SAR_CFG_RAWIE | /* interrupt enable on raw cells */ SAR_CFG_RQFIE | /* interrupt on RSQ almost full */ SAR_CFG_TMOIE | /* interrupt on timer overflow */ SAR_CFG_FBIE | /* interrupt on low free buffers */ SAR_CFG_TXEN | /* transmit operation enable */ SAR_CFG_TXINT | /* interrupt on transmit status */ SAR_CFG_TXUIE | /* interrupt on xmit underrun */ SAR_CFG_TXSFI /* interrupt on TSQ almost full */ ; writel(readl(SAR_REG_CFG) & ~(conf), SAR_REG_CFG); DIPRINTK("%s: closed IDT77252 ABR SAR.\n", card->name); } /*****************************************************************************/ /* */ /* Initialisation and Deinitialization of IDT77252 */ /* */ /*****************************************************************************/ static void deinit_card(struct idt77252_dev *card) { struct sk_buff *skb; int i, j; if (!test_bit(IDT77252_BIT_INIT, &card->flags)) { printk("%s: SAR not yet initialized.\n", card->name); return; } DIPRINTK("idt77252: deinitialize card %u\n", card->index); writel(0, SAR_REG_CFG); if (card->atmdev) atm_dev_deregister(card->atmdev); for (i = 0; i < 4; i++) { for (j = 0; j < FBQ_SIZE; j++) { skb = card->sbpool[i].skb[j]; if (skb) { 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)); return err; } card = kzalloc(sizeof(struct idt77252_dev), GFP_KERNEL); if (!card) { printk("idt77252-%d: can't allocate private data\n", index); err = -ENOMEM; goto err_out_disable_pdev; } card->revision = pcidev->revision; card->index = index; card->pcidev = pcidev; sprintf(card->name, "idt77252-%d", card->index); INIT_WORK(&card->tqueue, idt77252_softint); membase = pci_resource_start(pcidev, 1); srambase = pci_resource_start(pcidev, 2); mutex_init(&card->mutex); spin_lock_init(&card->cmd_lock); spin_lock_init(&card->tst_lock); 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); if (sizeof(skb->cb) < sizeof(struct atm_skb_data) + sizeof(struct idt77252_skb_prv)) { printk(KERN_ERR "%s: skb->cb is too small (%lu < %lu)\n", __func__, (unsigned long) sizeof(skb->cb), (unsigned long) sizeof(struct atm_skb_data) + sizeof(struct idt77252_skb_prv)); return -EIO; } return pci_register_driver(&idt77252_driver); } static void __exit idt77252_exit(void) { struct idt77252_dev *card; struct atm_dev *dev; pci_unregister_driver(&idt77252_driver); while (idt77252_chain) { card = idt77252_chain; dev = card->atmdev; idt77252_chain = card->next; if (dev->phy->stop) dev->phy->stop(dev); deinit_card(card); pci_disable_device(card->pcidev); kfree(card); } DIPRINTK("idt77252: finished cleanup-module().\n"); } module_init(idt77252_init); module_exit(idt77252_exit); MODULE_LICENSE("GPL"); module_param(vpibits, uint, 0); MODULE_PARM_DESC(vpibits, "number of VPI bits supported (0, 1, or 2)"); #ifdef CONFIG_ATM_IDT77252_DEBUG module_param(debug, ulong, 0644); MODULE_PARM_DESC(debug, "debug bitmap, see drivers/atm/idt77252.h"); #endif MODULE_AUTHOR("Eddie C. Dost <ecd@atecom.com>"); MODULE_DESCRIPTION("IDT77252 ABR SAR Driver");
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