/* * Driver for the Solos PCI ADSL2+ card, designed to support Linux by * Traverse Technologies -- http://www.traverse.com.au/ * Xrio Limited -- http://www.xrio.com/ * * * Copyright © 2008 Traverse Technologies * Copyright © 2008 Intel Corporation * * Authors: Nathan Williams * David Woodhouse * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #define DEBUG #define VERBOSE_DEBUG #include #include #include #include #include #include #include #include #include #include #include #include #include #define VERSION "0.04" #define PTAG "solos-pci" #define CONFIG_RAM_SIZE 128 #define FLAGS_ADDR 0x7C #define IRQ_EN_ADDR 0x78 #define FPGA_VER 0x74 #define IRQ_CLEAR 0x70 #define BUG_FLAG 0x6C #define DATA_RAM_SIZE 32768 #define BUF_SIZE 4096 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2) #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE) static int debug = 0; static int atmdebug = 0; struct pkt_hdr { __le16 size; __le16 vpi; __le16 vci; __le16 type; }; #define PKT_DATA 0 #define PKT_COMMAND 1 #define PKT_POPEN 3 #define PKT_PCLOSE 4 struct solos_card { void __iomem *config_regs; void __iomem *buffers; int nr_ports; struct pci_dev *dev; struct atm_dev *atmdev[4]; struct tasklet_struct tlet; spinlock_t tx_lock; spinlock_t tx_queue_lock; spinlock_t cli_queue_lock; struct sk_buff_head tx_queue[4]; struct sk_buff_head cli_queue[4]; }; #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data) MODULE_AUTHOR("Traverse Technologies "); MODULE_DESCRIPTION("Solos PCI driver"); MODULE_VERSION(VERSION); MODULE_LICENSE("GPL"); MODULE_PARM_DESC(debug, "Enable Loopback"); MODULE_PARM_DESC(atmdebug, "Print ATM data"); module_param(debug, int, 0444); module_param(atmdebug, int, 0644); static int opens; static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb, struct atm_vcc *vcc); static int fpga_tx(struct solos_card *); static irqreturn_t solos_irq(int irq, void *dev_id); static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci); static int list_vccs(int vci); static int atm_init(struct solos_card *); static void atm_remove(struct solos_card *); static int send_command(struct solos_card *card, int dev, const char *buf, size_t size); static void solos_bh(unsigned long); static int print_buffer(struct sk_buff *buf); static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb) { if (vcc->pop) vcc->pop(vcc, skb); else dev_kfree_skb_any(skb); } static ssize_t console_show(struct device *dev, struct device_attribute *attr, char *buf) { struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev); struct solos_card *card = atmdev->dev_data; struct sk_buff *skb; spin_lock(&card->cli_queue_lock); skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]); spin_unlock(&card->cli_queue_lock); if(skb == NULL) return sprintf(buf, "No data.\n"); memcpy(buf, skb->data, skb->len); dev_dbg(&card->dev->dev, "len: %d\n", skb->len); kfree_skb(skb); return skb->len; } static int send_command(struct solos_card *card, int dev, const char *buf, size_t size) { struct sk_buff *skb; struct pkt_hdr *header; // dev_dbg(&card->dev->dev, "size: %d\n", size); if (size > (BUF_SIZE - sizeof(*header))) { dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n"); return 0; } skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC); if (!skb) { dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n"); return 0; } header = (void *)skb_put(skb, sizeof(*header)); header->size = cpu_to_le16(size); header->vpi = cpu_to_le16(0); header->vci = cpu_to_le16(0); header->type = cpu_to_le16(PKT_COMMAND); memcpy(skb_put(skb, size), buf, size); fpga_queue(card, dev, skb, NULL); return 0; } static ssize_t console_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev); struct solos_card *card = atmdev->dev_data; int err; err = send_command(card, SOLOS_CHAN(atmdev), buf, count); return err?:count; } static DEVICE_ATTR(console, 0644, console_show, console_store); static irqreturn_t solos_irq(int irq, void *dev_id) { struct solos_card *card = dev_id; int handled = 1; //ACK IRQ iowrite32(0, card->config_regs + IRQ_CLEAR); //Disable IRQs from FPGA iowrite32(0, card->config_regs + IRQ_EN_ADDR); /* If we only do it when the device is open, we lose console messages */ if (1 || opens) tasklet_schedule(&card->tlet); //Enable IRQs from FPGA iowrite32(1, card->config_regs + IRQ_EN_ADDR); return IRQ_RETVAL(handled); } void solos_bh(unsigned long card_arg) { struct solos_card *card = (void *)card_arg; int port; uint32_t card_flags; uint32_t tx_mask; uint32_t rx_done = 0; card_flags = ioread32(card->config_regs + FLAGS_ADDR); /* The TX bits are set if the channel is busy; clear if not. We want to invoke fpga_tx() unless _all_ the bits for active channels are set */ tx_mask = (1 << card->nr_ports) - 1; if ((card_flags & tx_mask) != tx_mask) fpga_tx(card); for (port = 0; port < card->nr_ports; port++) { if (card_flags & (0x10 << port)) { struct pkt_hdr header; struct sk_buff *skb; struct atm_vcc *vcc; int size; rx_done |= 0x10 << port; memcpy_fromio(&header, RX_BUF(card, port), sizeof(header)); size = le16_to_cpu(header.size); skb = alloc_skb(size, GFP_ATOMIC); if (!skb) { if (net_ratelimit()) dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n"); continue; } memcpy_fromio(skb_put(skb, size), RX_BUF(card, port) + sizeof(header), size); if (atmdebug) { dev_info(&card->dev->dev, "Received: device %d\n", port); dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n", size, le16_to_cpu(header.vpi), le16_to_cpu(header.vci)); print_buffer(skb); } switch (le16_to_cpu(header.type)) { case PKT_DATA: vcc = find_vcc(card->atmdev[port], le16_to_cpu(header.vpi), le16_to_cpu(header.vci)); if (!vcc) { if (net_ratelimit()) dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n", le16_to_cpu(header.vci), le16_to_cpu(header.vpi), port); continue; } atm_charge(vcc, skb->truesize); vcc->push(vcc, skb); atomic_inc(&vcc->stats->rx); break; case PKT_COMMAND: default: /* FIXME: Not really, surely? */ spin_lock(&card->cli_queue_lock); if (skb_queue_len(&card->cli_queue[port]) > 10) { if (net_ratelimit()) dev_warn(&card->dev->dev, "Dropping console response on port %d\n", port); } else skb_queue_tail(&card->cli_queue[port], skb); spin_unlock(&card->cli_queue_lock); break; } } } if (rx_done) iowrite32(rx_done, card->config_regs + FLAGS_ADDR); return; } static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci) { struct hlist_head *head; struct atm_vcc *vcc = NULL; struct hlist_node *node; struct sock *s; read_lock(&vcc_sklist_lock); head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)]; sk_for_each(s, node, head) { vcc = atm_sk(s); if (vcc->dev == dev && vcc->vci == vci && vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE) goto out; } vcc = NULL; out: read_unlock(&vcc_sklist_lock); return vcc; } static int list_vccs(int vci) { struct hlist_head *head; struct atm_vcc *vcc; struct hlist_node *node; struct sock *s; int num_found = 0; int i; read_lock(&vcc_sklist_lock); if (vci != 0){ head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)]; sk_for_each(s, node, head) { num_found ++; vcc = atm_sk(s); printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n", vcc->dev->number, vcc->vpi, vcc->vci); } } else { for(i=0; i<32; i++){ head = &vcc_hash[i]; sk_for_each(s, node, head) { num_found ++; vcc = atm_sk(s); printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n", vcc->dev->number, vcc->vpi, vcc->vci); } } } read_unlock(&vcc_sklist_lock); return num_found; } static int popen(struct atm_vcc *vcc) { struct solos_card *card = vcc->dev->dev_data; struct sk_buff *skb; struct pkt_hdr *header; skb = alloc_skb(sizeof(*header), GFP_ATOMIC); if (!skb && net_ratelimit()) { dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n"); return -ENOMEM; } header = (void *)skb_put(skb, sizeof(*header)); header->size = cpu_to_le16(0); header->vpi = cpu_to_le16(vcc->vpi); header->vci = cpu_to_le16(vcc->vci); header->type = cpu_to_le16(PKT_POPEN); fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL); // dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev)); set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci set_bit(ATM_VF_READY, &vcc->flags); list_vccs(0); if (!opens) iowrite32(1, card->config_regs + IRQ_EN_ADDR); opens++; //count open PVCs return 0; } static void pclose(struct atm_vcc *vcc) { struct solos_card *card = vcc->dev->dev_data; struct sk_buff *skb; struct pkt_hdr *header; skb = alloc_skb(sizeof(*header), GFP_ATOMIC); if (!skb) { dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n"); return; } header = (void *)skb_put(skb, sizeof(*header)); header->size = cpu_to_le16(0); header->vpi = cpu_to_le16(vcc->vpi); header->vci = cpu_to_le16(vcc->vci); header->type = cpu_to_le16(PKT_PCLOSE); fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL); // dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev)); if (!--opens) iowrite32(0, card->config_regs + IRQ_EN_ADDR); clear_bit(ATM_VF_ADDR, &vcc->flags); clear_bit(ATM_VF_READY, &vcc->flags); return; } static int print_buffer(struct sk_buff *buf) { int len,i; char msg[500]; char item[10]; len = buf->len; for (i = 0; i < len; i++){ if(i % 8 == 0) sprintf(msg, "%02X: ", i); sprintf(item,"%02X ",*(buf->data + i)); strcat(msg, item); if(i % 8 == 7) { sprintf(item, "\n"); strcat(msg, item); printk(KERN_DEBUG "%s", msg); } } if (i % 8 != 0) { sprintf(item, "\n"); strcat(msg, item); printk(KERN_DEBUG "%s", msg); } printk(KERN_DEBUG "\n"); return 0; } static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb, struct atm_vcc *vcc) { int old_len; *(void **)skb->cb = vcc; spin_lock(&card->tx_queue_lock); old_len = skb_queue_len(&card->tx_queue[port]); skb_queue_tail(&card->tx_queue[port], skb); spin_unlock(&card->tx_queue_lock); /* If TX might need to be started, do so */ if (!old_len) fpga_tx(card); } static int fpga_tx(struct solos_card *card) { uint32_t tx_pending; uint32_t tx_started = 0; struct sk_buff *skb; struct atm_vcc *vcc; unsigned char port; unsigned long flags; spin_lock_irqsave(&card->tx_lock, flags); tx_pending = ioread32(card->config_regs + FLAGS_ADDR); dev_vdbg(&card->dev->dev, "TX Flags are %X\n", tx_pending); for (port = 0; port < card->nr_ports; port++) { if (!(tx_pending & (1 << port))) { spin_lock(&card->tx_queue_lock); skb = skb_dequeue(&card->tx_queue[port]); spin_unlock(&card->tx_queue_lock); if (!skb) continue; if (atmdebug) { dev_info(&card->dev->dev, "Transmitted: port %d\n", port); print_buffer(skb); } memcpy_toio(TX_BUF(card, port), skb->data, skb->len); vcc = *(void **)skb->cb; if (vcc) { atomic_inc(&vcc->stats->tx); solos_pop(vcc, skb); } else dev_kfree_skb_irq(skb); tx_started |= 1 << port; //Set TX full flag } } if (tx_started) iowrite32(tx_started, card->config_regs + FLAGS_ADDR); spin_unlock_irqrestore(&card->tx_lock, flags); return 0; } static int psend(struct atm_vcc *vcc, struct sk_buff *skb) { struct solos_card *card = vcc->dev->dev_data; struct sk_buff *skb2 = NULL; struct pkt_hdr *header; int pktlen; //dev_dbg(&card->dev->dev, "psend called.\n"); //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci); if (debug) { skb2 = atm_alloc_charge(vcc, skb->len, GFP_ATOMIC); if (skb2) { memcpy(skb2->data, skb->data, skb->len); skb_put(skb2, skb->len); vcc->push(vcc, skb2); atomic_inc(&vcc->stats->rx); } atomic_inc(&vcc->stats->tx); solos_pop(vcc, skb); return 0; } pktlen = skb->len; if (pktlen > (BUF_SIZE - sizeof(*header))) { dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n"); solos_pop(vcc, skb); return 0; } if (!skb_clone_writable(skb, sizeof(*header))) { int expand_by = 0; int ret; if (skb_headroom(skb) < sizeof(*header)) expand_by = sizeof(*header) - skb_headroom(skb); ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC); if (ret) { dev_warn(&card->dev->dev, "pskb_expand_head failed.\n"); solos_pop(vcc, skb); return ret; } } header = (void *)skb_push(skb, sizeof(*header)); /* This does _not_ include the size of the header */ header->size = cpu_to_le16(pktlen); header->vpi = cpu_to_le16(vcc->vpi); header->vci = cpu_to_le16(vcc->vci); header->type = cpu_to_le16(PKT_DATA); fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc); return 0; } static struct atmdev_ops fpga_ops = { .open = popen, .close = pclose, .ioctl = NULL, .getsockopt = NULL, .setsockopt = NULL, .send = psend, .send_oam = NULL, .phy_put = NULL, .phy_get = NULL, .change_qos = NULL, .proc_read = NULL, .owner = THIS_MODULE }; static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id) { int err, i; uint16_t fpga_ver; uint8_t major_ver, minor_ver; uint32_t data32; struct solos_card *card; if (debug) return 0; card = kzalloc(sizeof(*card), GFP_KERNEL); if (!card) return -ENOMEM; card->dev = dev; err = pci_enable_device(dev); if (err) { dev_warn(&dev->dev, "Failed to enable PCI device\n"); goto out; } err = pci_request_regions(dev, "solos"); if (err) { dev_warn(&dev->dev, "Failed to request regions\n"); goto out; } card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE); if (!card->config_regs) { dev_warn(&dev->dev, "Failed to ioremap config registers\n"); goto out_release_regions; } card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE); if (!card->buffers) { dev_warn(&dev->dev, "Failed to ioremap data buffers\n"); goto out_unmap_config; } // for(i=0;i<64 ;i+=4){ // data32=ioread32(card->buffers + i); // dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32); // } //Fill Config Mem with zeros for(i = 0; i < 128; i += 4) iowrite32(0, card->config_regs + i); //Set RX empty flags iowrite32(0xF0, card->config_regs + FLAGS_ADDR); data32 = ioread32(card->config_regs + FPGA_VER); fpga_ver = (data32 & 0x0000FFFF); major_ver = ((data32 & 0xFF000000) >> 24); minor_ver = ((data32 & 0x00FF0000) >> 16); dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n", major_ver, minor_ver, fpga_ver); card->nr_ports = 2; /* FIXME: Detect daughterboard */ err = atm_init(card); if (err) goto out_unmap_both; pci_set_drvdata(dev, card); tasklet_init(&card->tlet, solos_bh, (unsigned long)card); spin_lock_init(&card->tx_lock); spin_lock_init(&card->tx_queue_lock); spin_lock_init(&card->cli_queue_lock); /* // Set Loopback mode data32 = 0x00010000; iowrite32(data32,card->config_regs + FLAGS_ADDR); */ /* // Fill Buffers with zeros for (i = 0; i < BUF_SIZE * 8; i += 4) iowrite32(0, card->buffers + i); */ /* for(i = 0; i < (BUF_SIZE * 1); i += 4) iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE)); for(i = 0; i < (BUF_SIZE * 1); i += 4) iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE)); // Read Config Memory printk(KERN_DEBUG "Reading Config MEM\n"); i = 0; for(i = 0; i < 16; i++) { data32=ioread32(card->buffers + i*(BUF_SIZE/2)); printk(KERN_ALERT "Addr: %lX Data: %08lX\n", (unsigned long)(addr_start + i*(BUF_SIZE/2)), (unsigned long)data32); } */ //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq); err = request_irq(dev->irq, solos_irq, IRQF_DISABLED|IRQF_SHARED, "solos-pci", card); if (err) dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq); // Enable IRQs iowrite32(1, card->config_regs + IRQ_EN_ADDR); return 0; out_unmap_both: pci_iounmap(dev, card->config_regs); out_unmap_config: pci_iounmap(dev, card->buffers); out_release_regions: pci_release_regions(dev); out: return err; } static int atm_init(struct solos_card *card) { int i; opens = 0; for (i = 0; i < card->nr_ports; i++) { skb_queue_head_init(&card->tx_queue[i]); skb_queue_head_init(&card->cli_queue[i]); card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL); if (!card->atmdev[i]) { dev_err(&card->dev->dev, "Could not register ATM device %d\n", i); atm_remove(card); return -ENODEV; } if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console)) dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i); dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number); card->atmdev[i]->ci_range.vpi_bits = 8; card->atmdev[i]->ci_range.vci_bits = 16; card->atmdev[i]->dev_data = card; card->atmdev[i]->phy_data = (void *)(unsigned long)i; } return 0; } static void atm_remove(struct solos_card *card) { int i; for (i = 0; i < card->nr_ports; i++) { if (card->atmdev[i]) { dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number); atm_dev_deregister(card->atmdev[i]); } } } static void fpga_remove(struct pci_dev *dev) { struct solos_card *card = pci_get_drvdata(dev); if (debug) return; atm_remove(card); dev_vdbg(&dev->dev, "Freeing IRQ\n"); // Disable IRQs from FPGA iowrite32(0, card->config_regs + IRQ_EN_ADDR); free_irq(dev->irq, card); tasklet_kill(&card->tlet); // iowrite32(0x01,pciregs); dev_vdbg(&dev->dev, "Unmapping PCI resource\n"); pci_iounmap(dev, card->buffers); pci_iounmap(dev, card->config_regs); dev_vdbg(&dev->dev, "Releasing PCI Region\n"); pci_release_regions(dev); pci_disable_device(dev); pci_set_drvdata(dev, NULL); kfree(card); // dev_dbg(&card->dev->dev, "fpga_remove\n"); return; } static struct pci_device_id fpga_pci_tbl[] __devinitdata = { { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, { 0, } }; MODULE_DEVICE_TABLE(pci,fpga_pci_tbl); static struct pci_driver fpga_driver = { .name = "solos", .id_table = fpga_pci_tbl, .probe = fpga_probe, .remove = fpga_remove, }; static int __init solos_pci_init(void) { printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION); return pci_register_driver(&fpga_driver); } static void __exit solos_pci_exit(void) { pci_unregister_driver(&fpga_driver); printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION); } module_init(solos_pci_init); module_exit(solos_pci_exit);