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path: root/drivers/usb/atm/usb_atm.c
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Diffstat (limited to 'drivers/usb/atm/usb_atm.c')
-rw-r--r--drivers/usb/atm/usb_atm.c1188
1 files changed, 0 insertions, 1188 deletions
diff --git a/drivers/usb/atm/usb_atm.c b/drivers/usb/atm/usb_atm.c
deleted file mode 100644
index a4cd4476d49..00000000000
--- a/drivers/usb/atm/usb_atm.c
+++ /dev/null
@@ -1,1188 +0,0 @@
-/******************************************************************************
- * usb_atm.c - Generic USB xDSL driver core
- *
- * Copyright (C) 2001, Alcatel
- * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
- * Copyright (C) 2004, David Woodhouse
- *
- * 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 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.
- *
- * 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., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- ******************************************************************************/
-
-/*
- * Written by Johan Verrept, maintained by Duncan Sands (duncan.sands@free.fr)
- *
- * 1.7+: - See the check-in logs
- *
- * 1.6: - No longer opens a connection if the firmware is not loaded
- * - Added support for the speedtouch 330
- * - Removed the limit on the number of devices
- * - Module now autoloads on device plugin
- * - Merged relevant parts of sarlib
- * - Replaced the kernel thread with a tasklet
- * - New packet transmission code
- * - Changed proc file contents
- * - Fixed all known SMP races
- * - Many fixes and cleanups
- * - Various fixes by Oliver Neukum (oliver@neukum.name)
- *
- * 1.5A: - Version for inclusion in 2.5 series kernel
- * - Modifications by Richard Purdie (rpurdie@rpsys.net)
- * - made compatible with kernel 2.5.6 onwards by changing
- * udsl_usb_send_data_context->urb to a pointer and adding code
- * to alloc and free it
- * - remove_wait_queue() added to udsl_atm_processqueue_thread()
- *
- * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL.
- * (reported by stephen.robinson@zen.co.uk)
- *
- * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave()
- * - unlink all active send urbs of a vcc that is being closed.
- *
- * 1.3.1: - added the version number
- *
- * 1.3: - Added multiple send urb support
- * - fixed memory leak and vcc->tx_inuse starvation bug
- * when not enough memory left in vcc.
- *
- * 1.2: - Fixed race condition in udsl_usb_send_data()
- * 1.1: - Turned off packet debugging
- *
- */
-
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/errno.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <linux/wait.h>
-#include <linux/list.h>
-#include <asm/uaccess.h>
-#include <linux/smp_lock.h>
-#include <linux/interrupt.h>
-#include <linux/atm.h>
-#include <linux/atmdev.h>
-#include <linux/crc32.h>
-#include <linux/init.h>
-#include <linux/firmware.h>
-
-#include "usb_atm.h"
-
-#ifdef VERBOSE_DEBUG
-static int udsl_print_packet(const unsigned char *data, int len);
-#define PACKETDEBUG(arg...) udsl_print_packet (arg)
-#define vdbg(arg...) dbg (arg)
-#else
-#define PACKETDEBUG(arg...)
-#define vdbg(arg...)
-#endif
-
-#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands <duncan.sands@free.fr>"
-#define DRIVER_VERSION "1.8"
-#define DRIVER_DESC "Generic USB ATM/DSL I/O, version " DRIVER_VERSION
-
-static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
-static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
-static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS;
-static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS;
-static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE;
-static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE;
-
-module_param(num_rcv_urbs, uint, 0444);
-MODULE_PARM_DESC(num_rcv_urbs,
- "Number of urbs used for reception (range: 0-"
- __MODULE_STRING(UDSL_MAX_RCV_URBS) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_RCV_URBS) ")");
-
-module_param(num_snd_urbs, uint, 0444);
-MODULE_PARM_DESC(num_snd_urbs,
- "Number of urbs used for transmission (range: 0-"
- __MODULE_STRING(UDSL_MAX_SND_URBS) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_SND_URBS) ")");
-
-module_param(num_rcv_bufs, uint, 0444);
-MODULE_PARM_DESC(num_rcv_bufs,
- "Number of buffers used for reception (range: 0-"
- __MODULE_STRING(UDSL_MAX_RCV_BUFS) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_RCV_BUFS) ")");
-
-module_param(num_snd_bufs, uint, 0444);
-MODULE_PARM_DESC(num_snd_bufs,
- "Number of buffers used for transmission (range: 0-"
- __MODULE_STRING(UDSL_MAX_SND_BUFS) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_SND_BUFS) ")");
-
-module_param(rcv_buf_size, uint, 0444);
-MODULE_PARM_DESC(rcv_buf_size,
- "Size of the buffers used for reception (range: 0-"
- __MODULE_STRING(UDSL_MAX_RCV_BUF_SIZE) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_RCV_BUF_SIZE) ")");
-
-module_param(snd_buf_size, uint, 0444);
-MODULE_PARM_DESC(snd_buf_size,
- "Size of the buffers used for transmission (range: 0-"
- __MODULE_STRING(UDSL_MAX_SND_BUF_SIZE) ", default: "
- __MODULE_STRING(UDSL_DEFAULT_SND_BUF_SIZE) ")");
-
-/* ATM */
-
-static void udsl_atm_dev_close(struct atm_dev *dev);
-static int udsl_atm_open(struct atm_vcc *vcc);
-static void udsl_atm_close(struct atm_vcc *vcc);
-static int udsl_atm_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * arg);
-static int udsl_atm_send(struct atm_vcc *vcc, struct sk_buff *skb);
-static int udsl_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page);
-
-static struct atmdev_ops udsl_atm_devops = {
- .dev_close = udsl_atm_dev_close,
- .open = udsl_atm_open,
- .close = udsl_atm_close,
- .ioctl = udsl_atm_ioctl,
- .send = udsl_atm_send,
- .proc_read = udsl_atm_proc_read,
- .owner = THIS_MODULE,
-};
-
-/***********
-** misc **
-***********/
-
-static inline void udsl_pop(struct atm_vcc *vcc, struct sk_buff *skb)
-{
- if (vcc->pop)
- vcc->pop(vcc, skb);
- else
- dev_kfree_skb(skb);
-}
-
-/*************
-** decode **
-*************/
-
-static inline struct udsl_vcc_data *udsl_find_vcc(struct udsl_instance_data *instance,
- short vpi, int vci)
-{
- struct udsl_vcc_data *vcc;
-
- list_for_each_entry(vcc, &instance->vcc_list, list)
- if ((vcc->vci == vci) && (vcc->vpi == vpi))
- return vcc;
- return NULL;
-}
-
-static void udsl_extract_cells(struct udsl_instance_data *instance,
- unsigned char *source, unsigned int howmany)
-{
- struct udsl_vcc_data *cached_vcc = NULL;
- struct atm_vcc *vcc;
- struct sk_buff *sarb;
- struct udsl_vcc_data *vcc_data;
- int cached_vci = 0;
- unsigned int i;
- int pti;
- int vci;
- short cached_vpi = 0;
- short vpi;
-
- for (i = 0; i < howmany;
- i++, source += ATM_CELL_SIZE + instance->rcv_padding) {
- vpi = ((source[0] & 0x0f) << 4) | (source[1] >> 4);
- vci = ((source[1] & 0x0f) << 12) | (source[2] << 4) | (source[3] >> 4);
- pti = (source[3] & 0x2) != 0;
-
- vdbg("udsl_extract_cells: vpi %hd, vci %d, pti %d", vpi, vci, pti);
-
- if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi))
- vcc_data = cached_vcc;
- else if ((vcc_data = udsl_find_vcc(instance, vpi, vci))) {
- cached_vcc = vcc_data;
- cached_vpi = vpi;
- cached_vci = vci;
- } else {
- dbg("udsl_extract_cells: unknown vpi/vci (%hd/%d)!", vpi, vci);
- continue;
- }
-
- vcc = vcc_data->vcc;
- sarb = vcc_data->sarb;
-
- if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) {
- dbg("udsl_extract_cells: buffer overrun (sarb->len %u, vcc: 0x%p)!", sarb->len, vcc);
- /* discard cells already received */
- skb_trim(sarb, 0);
- }
-
- memcpy(sarb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD);
- __skb_put(sarb, ATM_CELL_PAYLOAD);
-
- if (pti) {
- struct sk_buff *skb;
- unsigned int length;
- unsigned int pdu_length;
-
- length = (source[ATM_CELL_SIZE - 6] << 8) + source[ATM_CELL_SIZE - 5];
-
- /* guard against overflow */
- if (length > ATM_MAX_AAL5_PDU) {
- dbg("udsl_extract_cells: bogus length %u (vcc: 0x%p)!", length, vcc);
- atomic_inc(&vcc->stats->rx_err);
- goto out;
- }
-
- pdu_length = UDSL_NUM_CELLS(length) * ATM_CELL_PAYLOAD;
-
- if (sarb->len < pdu_length) {
- dbg("udsl_extract_cells: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!", pdu_length, sarb->len, vcc);
- atomic_inc(&vcc->stats->rx_err);
- goto out;
- }
-
- if (crc32_be(~0, sarb->tail - pdu_length, pdu_length) != 0xc704dd7b) {
- dbg("udsl_extract_cells: packet failed crc check (vcc: 0x%p)!", vcc);
- atomic_inc(&vcc->stats->rx_err);
- goto out;
- }
-
- vdbg("udsl_extract_cells: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", length, pdu_length, vcc);
-
- if (!(skb = dev_alloc_skb(length))) {
- dbg("udsl_extract_cells: no memory for skb (length: %u)!", length);
- atomic_inc(&vcc->stats->rx_drop);
- goto out;
- }
-
- vdbg("udsl_extract_cells: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", skb, skb->truesize);
-
- if (!atm_charge(vcc, skb->truesize)) {
- dbg("udsl_extract_cells: failed atm_charge (skb->truesize: %u)!", skb->truesize);
- dev_kfree_skb(skb);
- goto out; /* atm_charge increments rx_drop */
- }
-
- memcpy(skb->data, sarb->tail - pdu_length, length);
- __skb_put(skb, length);
-
- vdbg("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize);
-
- PACKETDEBUG(skb->data, skb->len);
-
- vcc->push(vcc, skb);
-
- atomic_inc(&vcc->stats->rx);
- out:
- skb_trim(sarb, 0);
- }
- }
-}
-
-/*************
-** encode **
-*************/
-
-static inline void udsl_fill_cell_header(unsigned char *target, struct atm_vcc *vcc)
-{
- target[0] = vcc->vpi >> 4;
- target[1] = (vcc->vpi << 4) | (vcc->vci >> 12);
- target[2] = vcc->vci >> 4;
- target[3] = vcc->vci << 4;
- target[4] = 0xec;
-}
-
-static const unsigned char zeros[ATM_CELL_PAYLOAD];
-
-static void udsl_groom_skb(struct atm_vcc *vcc, struct sk_buff *skb)
-{
- struct udsl_control *ctrl = UDSL_SKB(skb);
- unsigned int zero_padding;
- u32 crc;
-
- ctrl->atm_data.vcc = vcc;
-
- ctrl->num_cells = UDSL_NUM_CELLS(skb->len);
- ctrl->num_entire = skb->len / ATM_CELL_PAYLOAD;
-
- zero_padding = ctrl->num_cells * ATM_CELL_PAYLOAD - skb->len - ATM_AAL5_TRAILER;
-
- if (ctrl->num_entire + 1 < ctrl->num_cells)
- ctrl->pdu_padding = zero_padding - (ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
- else
- ctrl->pdu_padding = zero_padding;
-
- ctrl->aal5_trailer[0] = 0; /* UU = 0 */
- ctrl->aal5_trailer[1] = 0; /* CPI = 0 */
- ctrl->aal5_trailer[2] = skb->len >> 8;
- ctrl->aal5_trailer[3] = skb->len;
-
- crc = crc32_be(~0, skb->data, skb->len);
- crc = crc32_be(crc, zeros, zero_padding);
- crc = crc32_be(crc, ctrl->aal5_trailer, 4);
- crc = ~crc;
-
- ctrl->aal5_trailer[4] = crc >> 24;
- ctrl->aal5_trailer[5] = crc >> 16;
- ctrl->aal5_trailer[6] = crc >> 8;
- ctrl->aal5_trailer[7] = crc;
-}
-
-static unsigned int udsl_write_cells(struct udsl_instance_data *instance,
- unsigned int howmany, struct sk_buff *skb,
- unsigned char **target_p)
-{
- struct udsl_control *ctrl = UDSL_SKB(skb);
- unsigned char *target = *target_p;
- unsigned int nc, ne, i;
-
- vdbg("udsl_write_cells: howmany=%u, skb->len=%d, num_cells=%u, num_entire=%u, pdu_padding=%u", howmany, skb->len, ctrl->num_cells, ctrl->num_entire, ctrl->pdu_padding);
-
- nc = ctrl->num_cells;
- ne = min(howmany, ctrl->num_entire);
-
- for (i = 0; i < ne; i++) {
- udsl_fill_cell_header(target, ctrl->atm_data.vcc);
- target += ATM_CELL_HEADER;
- memcpy(target, skb->data, ATM_CELL_PAYLOAD);
- target += ATM_CELL_PAYLOAD;
- if (instance->snd_padding) {
- memset(target, 0, instance->snd_padding);
- target += instance->snd_padding;
- }
- __skb_pull(skb, ATM_CELL_PAYLOAD);
- }
-
- ctrl->num_entire -= ne;
-
- if (!(ctrl->num_cells -= ne) || !(howmany -= ne))
- goto out;
-
- udsl_fill_cell_header(target, ctrl->atm_data.vcc);
- target += ATM_CELL_HEADER;
- memcpy(target, skb->data, skb->len);
- target += skb->len;
- __skb_pull(skb, skb->len);
- memset(target, 0, ctrl->pdu_padding);
- target += ctrl->pdu_padding;
-
- if (--ctrl->num_cells) {
- if (!--howmany) {
- ctrl->pdu_padding = ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
- goto out;
- }
-
- if (instance->snd_padding) {
- memset(target, 0, instance->snd_padding);
- target += instance->snd_padding;
- }
- udsl_fill_cell_header(target, ctrl->atm_data.vcc);
- target += ATM_CELL_HEADER;
- memset(target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER);
- target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER;
-
- --ctrl->num_cells;
- UDSL_ASSERT(!ctrl->num_cells);
- }
-
- memcpy(target, ctrl->aal5_trailer, ATM_AAL5_TRAILER);
- target += ATM_AAL5_TRAILER;
- /* set pti bit in last cell */
- *(target + 3 - ATM_CELL_SIZE) |= 0x2;
- if (instance->snd_padding) {
- memset(target, 0, instance->snd_padding);
- target += instance->snd_padding;
- }
- out:
- *target_p = target;
- return nc - ctrl->num_cells;
-}
-
-/**************
-** receive **
-**************/
-
-static void udsl_complete_receive(struct urb *urb, struct pt_regs *regs)
-{
- struct udsl_receive_buffer *buf;
- struct udsl_instance_data *instance;
- struct udsl_receiver *rcv;
- unsigned long flags;
-
- if (!urb || !(rcv = urb->context)) {
- dbg("udsl_complete_receive: bad urb!");
- return;
- }
-
- instance = rcv->instance;
- buf = rcv->buffer;
-
- buf->filled_cells = urb->actual_length / (ATM_CELL_SIZE + instance->rcv_padding);
-
- vdbg("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf);
-
- UDSL_ASSERT(buf->filled_cells <= rcv_buf_size);
-
- /* may not be in_interrupt() */
- spin_lock_irqsave(&instance->receive_lock, flags);
- list_add(&rcv->list, &instance->spare_receivers);
- list_add_tail(&buf->list, &instance->filled_receive_buffers);
- if (likely(!urb->status))
- tasklet_schedule(&instance->receive_tasklet);
- spin_unlock_irqrestore(&instance->receive_lock, flags);
-}
-
-static void udsl_process_receive(unsigned long data)
-{
- struct udsl_receive_buffer *buf;
- struct udsl_instance_data *instance = (struct udsl_instance_data *)data;
- struct udsl_receiver *rcv;
- int err;
-
- made_progress:
- while (!list_empty(&instance->spare_receive_buffers)) {
- spin_lock_irq(&instance->receive_lock);
- if (list_empty(&instance->spare_receivers)) {
- spin_unlock_irq(&instance->receive_lock);
- break;
- }
- rcv = list_entry(instance->spare_receivers.next,
- struct udsl_receiver, list);
- list_del(&rcv->list);
- spin_unlock_irq(&instance->receive_lock);
-
- buf = list_entry(instance->spare_receive_buffers.next,
- struct udsl_receive_buffer, list);
- list_del(&buf->list);
-
- rcv->buffer = buf;
-
- usb_fill_bulk_urb(rcv->urb, instance->usb_dev,
- usb_rcvbulkpipe(instance->usb_dev, instance->data_endpoint),
- buf->base,
- rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding),
- udsl_complete_receive, rcv);
-
- vdbg("udsl_process_receive: sending urb 0x%p, rcv 0x%p, buf 0x%p",
- rcv->urb, rcv, buf);
-
- if ((err = usb_submit_urb(rcv->urb, GFP_ATOMIC)) < 0) {
- dbg("udsl_process_receive: urb submission failed (%d)!", err);
- list_add(&buf->list, &instance->spare_receive_buffers);
- spin_lock_irq(&instance->receive_lock);
- list_add(&rcv->list, &instance->spare_receivers);
- spin_unlock_irq(&instance->receive_lock);
- break;
- }
- }
-
- spin_lock_irq(&instance->receive_lock);
- if (list_empty(&instance->filled_receive_buffers)) {
- spin_unlock_irq(&instance->receive_lock);
- return; /* done - no more buffers */
- }
- buf = list_entry(instance->filled_receive_buffers.next,
- struct udsl_receive_buffer, list);
- list_del(&buf->list);
- spin_unlock_irq(&instance->receive_lock);
-
- vdbg("udsl_process_receive: processing buf 0x%p", buf);
- udsl_extract_cells(instance, buf->base, buf->filled_cells);
- list_add(&buf->list, &instance->spare_receive_buffers);
- goto made_progress;
-}
-
-/***********
-** send **
-***********/
-
-static void udsl_complete_send(struct urb *urb, struct pt_regs *regs)
-{
- struct udsl_instance_data *instance;
- struct udsl_sender *snd;
- unsigned long flags;
-
- if (!urb || !(snd = urb->context) || !(instance = snd->instance)) {
- dbg("udsl_complete_send: bad urb!");
- return;
- }
-
- vdbg("udsl_complete_send: urb 0x%p, status %d, snd 0x%p, buf 0x%p", urb,
- urb->status, snd, snd->buffer);
-
- /* may not be in_interrupt() */
- spin_lock_irqsave(&instance->send_lock, flags);
- list_add(&snd->list, &instance->spare_senders);
- list_add(&snd->buffer->list, &instance->spare_send_buffers);
- tasklet_schedule(&instance->send_tasklet);
- spin_unlock_irqrestore(&instance->send_lock, flags);
-}
-
-static void udsl_process_send(unsigned long data)
-{
- struct udsl_send_buffer *buf;
- struct udsl_instance_data *instance = (struct udsl_instance_data *)data;
- struct sk_buff *skb;
- struct udsl_sender *snd;
- int err;
- unsigned int num_written;
-
- made_progress:
- spin_lock_irq(&instance->send_lock);
- while (!list_empty(&instance->spare_senders)) {
- if (!list_empty(&instance->filled_send_buffers)) {
- buf = list_entry(instance->filled_send_buffers.next,
- struct udsl_send_buffer, list);
- list_del(&buf->list);
- } else if ((buf = instance->current_buffer)) {
- instance->current_buffer = NULL;
- } else /* all buffers empty */
- break;
-
- snd = list_entry(instance->spare_senders.next,
- struct udsl_sender, list);
- list_del(&snd->list);
- spin_unlock_irq(&instance->send_lock);
-
- snd->buffer = buf;
- usb_fill_bulk_urb(snd->urb, instance->usb_dev,
- usb_sndbulkpipe(instance->usb_dev, instance->data_endpoint),
- buf->base,
- (snd_buf_size - buf->free_cells) * (ATM_CELL_SIZE + instance->snd_padding),
- udsl_complete_send, snd);
-
- vdbg("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p",
- snd->urb, snd_buf_size - buf->free_cells, snd, buf);
-
- if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) {
- dbg("udsl_process_send: urb submission failed (%d)!", err);
- spin_lock_irq(&instance->send_lock);
- list_add(&snd->list, &instance->spare_senders);
- spin_unlock_irq(&instance->send_lock);
- list_add(&buf->list, &instance->filled_send_buffers);
- return; /* bail out */
- }
-
- spin_lock_irq(&instance->send_lock);
- } /* while */
- spin_unlock_irq(&instance->send_lock);
-
- if (!instance->current_skb)
- instance->current_skb = skb_dequeue(&instance->sndqueue);
- if (!instance->current_skb)
- return; /* done - no more skbs */
-
- skb = instance->current_skb;
-
- if (!(buf = instance->current_buffer)) {
- spin_lock_irq(&instance->send_lock);
- if (list_empty(&instance->spare_send_buffers)) {
- instance->current_buffer = NULL;
- spin_unlock_irq(&instance->send_lock);
- return; /* done - no more buffers */
- }
- buf = list_entry(instance->spare_send_buffers.next,
- struct udsl_send_buffer, list);
- list_del(&buf->list);
- spin_unlock_irq(&instance->send_lock);
-
- buf->free_start = buf->base;
- buf->free_cells = snd_buf_size;
-
- instance->current_buffer = buf;
- }
-
- num_written = udsl_write_cells(instance, buf->free_cells, skb, &buf->free_start);
-
- vdbg("udsl_process_send: wrote %u cells from skb 0x%p to buffer 0x%p",
- num_written, skb, buf);
-
- if (!(buf->free_cells -= num_written)) {
- list_add_tail(&buf->list, &instance->filled_send_buffers);
- instance->current_buffer = NULL;
- }
-
- vdbg("udsl_process_send: buffer contains %d cells, %d left",
- snd_buf_size - buf->free_cells, buf->free_cells);
-
- if (!UDSL_SKB(skb)->num_cells) {
- struct atm_vcc *vcc = UDSL_SKB(skb)->atm_data.vcc;
-
- udsl_pop(vcc, skb);
- instance->current_skb = NULL;
-
- atomic_inc(&vcc->stats->tx);
- }
-
- goto made_progress;
-}
-
-static void udsl_cancel_send(struct udsl_instance_data *instance,
- struct atm_vcc *vcc)
-{
- struct sk_buff *skb, *n;
-
- dbg("udsl_cancel_send entered");
- spin_lock_irq(&instance->sndqueue.lock);
- for (skb = instance->sndqueue.next, n = skb->next;
- skb != (struct sk_buff *)&instance->sndqueue;
- skb = n, n = skb->next)
- if (UDSL_SKB(skb)->atm_data.vcc == vcc) {
- dbg("udsl_cancel_send: popping skb 0x%p", skb);
- __skb_unlink(skb, &instance->sndqueue);
- udsl_pop(vcc, skb);
- }
- spin_unlock_irq(&instance->sndqueue.lock);
-
- tasklet_disable(&instance->send_tasklet);
- if ((skb = instance->current_skb) && (UDSL_SKB(skb)->atm_data.vcc == vcc)) {
- dbg("udsl_cancel_send: popping current skb (0x%p)", skb);
- instance->current_skb = NULL;
- udsl_pop(vcc, skb);
- }
- tasklet_enable(&instance->send_tasklet);
- dbg("udsl_cancel_send done");
-}
-
-static int udsl_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
-{
- struct udsl_instance_data *instance = vcc->dev->dev_data;
- int err;
-
- vdbg("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len);
-
- if (!instance) {
- dbg("udsl_atm_send: NULL data!");
- err = -ENODEV;
- goto fail;
- }
-
- if (vcc->qos.aal != ATM_AAL5) {
- dbg("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal);
- err = -EINVAL;
- goto fail;
- }
-
- if (skb->len > ATM_MAX_AAL5_PDU) {
- dbg("udsl_atm_send: packet too long (%d vs %d)!", skb->len,
- ATM_MAX_AAL5_PDU);
- err = -EINVAL;
- goto fail;
- }
-
- PACKETDEBUG(skb->data, skb->len);
-
- udsl_groom_skb(vcc, skb);
- skb_queue_tail(&instance->sndqueue, skb);
- tasklet_schedule(&instance->send_tasklet);
-
- return 0;
-
- fail:
- udsl_pop(vcc, skb);
- return err;
-}
-
-/********************
-** bean counting **
-********************/
-
-static void udsl_destroy_instance(struct kref *kref)
-{
- struct udsl_instance_data *instance =
- container_of(kref, struct udsl_instance_data, refcount);
-
- tasklet_kill(&instance->receive_tasklet);
- tasklet_kill(&instance->send_tasklet);
- usb_put_dev(instance->usb_dev);
- kfree(instance);
-}
-
-void udsl_get_instance(struct udsl_instance_data *instance)
-{
- kref_get(&instance->refcount);
-}
-
-void udsl_put_instance(struct udsl_instance_data *instance)
-{
- kref_put(&instance->refcount, udsl_destroy_instance);
-}
-
-/**********
-** ATM **
-**********/
-
-static void udsl_atm_dev_close(struct atm_dev *dev)
-{
- struct udsl_instance_data *instance = dev->dev_data;
-
- dev->dev_data = NULL;
- udsl_put_instance(instance);
-}
-
-static int udsl_atm_proc_read(struct atm_dev *atm_dev, loff_t * pos, char *page)
-{
- struct udsl_instance_data *instance = atm_dev->dev_data;
- int left = *pos;
-
- if (!instance) {
- dbg("udsl_atm_proc_read: NULL instance!");
- return -ENODEV;
- }
-
- if (!left--)
- return sprintf(page, "%s\n", instance->description);
-
- if (!left--)
- return sprintf(page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
- atm_dev->esi[0], atm_dev->esi[1],
- atm_dev->esi[2], atm_dev->esi[3],
- atm_dev->esi[4], atm_dev->esi[5]);
-
- if (!left--)
- return sprintf(page,
- "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n",
- atomic_read(&atm_dev->stats.aal5.tx),
- atomic_read(&atm_dev->stats.aal5.tx_err),
- atomic_read(&atm_dev->stats.aal5.rx),
- atomic_read(&atm_dev->stats.aal5.rx_err),
- atomic_read(&atm_dev->stats.aal5.rx_drop));
-
- if (!left--) {
- switch (atm_dev->signal) {
- case ATM_PHY_SIG_FOUND:
- sprintf(page, "Line up");
- break;
- case ATM_PHY_SIG_LOST:
- sprintf(page, "Line down");
- break;
- default:
- sprintf(page, "Line state unknown");
- break;
- }
-
- if (instance->usb_dev->state == USB_STATE_NOTATTACHED)
- strcat(page, ", disconnected\n");
- else {
- if (instance->status == UDSL_LOADED_FIRMWARE)
- strcat(page, ", firmware loaded\n");
- else if (instance->status == UDSL_LOADING_FIRMWARE)
- strcat(page, ", firmware loading\n");
- else
- strcat(page, ", no firmware\n");
- }
-
- return strlen(page);
- }
-
- return 0;
-}
-
-static int udsl_atm_open(struct atm_vcc *vcc)
-{
- struct udsl_instance_data *instance = vcc->dev->dev_data;
- struct udsl_vcc_data *new;
- unsigned int max_pdu;
- int vci = vcc->vci;
- short vpi = vcc->vpi;
- int err;
-
- dbg("udsl_atm_open: vpi %hd, vci %d", vpi, vci);
-
- if (!instance) {
- dbg("udsl_atm_open: NULL data!");
- return -ENODEV;
- }
-
- /* only support AAL5 */
- if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0)
- || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) {
- dbg("udsl_atm_open: unsupported ATM type %d!", vcc->qos.aal);
- return -EINVAL;
- }
-
- if (instance->firmware_wait &&
- (err = instance->firmware_wait(instance)) < 0) {
- dbg("udsl_atm_open: firmware not loaded (%d)!", err);
- return err;
- }
-
- down(&instance->serialize); /* vs self, udsl_atm_close */
-
- if (udsl_find_vcc(instance, vpi, vci)) {
- dbg("udsl_atm_open: %hd/%d already in use!", vpi, vci);
- up(&instance->serialize);
- return -EADDRINUSE;
- }
-
- if (!(new = kmalloc(sizeof(struct udsl_vcc_data), GFP_KERNEL))) {
- dbg("udsl_atm_open: no memory for vcc_data!");
- up(&instance->serialize);
- return -ENOMEM;
- }
-
- memset(new, 0, sizeof(struct udsl_vcc_data));
- new->vcc = vcc;
- new->vpi = vpi;
- new->vci = vci;
-
- /* udsl_extract_cells requires at least one cell */
- max_pdu = max(1, UDSL_NUM_CELLS(vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD;
- if (!(new->sarb = alloc_skb(max_pdu, GFP_KERNEL))) {
- dbg("udsl_atm_open: no memory for SAR buffer!");
- kfree(new);
- up(&instance->serialize);
- return -ENOMEM;
- }
-
- vcc->dev_data = new;
-
- tasklet_disable(&instance->receive_tasklet);
- list_add(&new->list, &instance->vcc_list);
- tasklet_enable(&instance->receive_tasklet);
-
- set_bit(ATM_VF_ADDR, &vcc->flags);
- set_bit(ATM_VF_PARTIAL, &vcc->flags);
- set_bit(ATM_VF_READY, &vcc->flags);
-
- up(&instance->serialize);
-
- tasklet_schedule(&instance->receive_tasklet);
-
- dbg("udsl_atm_open: allocated vcc data 0x%p (max_pdu: %u)", new, max_pdu);
-
- return 0;
-}
-
-static void udsl_atm_close(struct atm_vcc *vcc)
-{
- struct udsl_instance_data *instance = vcc->dev->dev_data;
- struct udsl_vcc_data *vcc_data = vcc->dev_data;
-
- dbg("udsl_atm_close called");
-
- if (!instance || !vcc_data) {
- dbg("udsl_atm_close: NULL data!");
- return;
- }
-
- dbg("udsl_atm_close: deallocating vcc 0x%p with vpi %d vci %d",
- vcc_data, vcc_data->vpi, vcc_data->vci);
-
- udsl_cancel_send(instance, vcc);
-
- down(&instance->serialize); /* vs self, udsl_atm_open */
-
- tasklet_disable(&instance->receive_tasklet);
- list_del(&vcc_data->list);
- tasklet_enable(&instance->receive_tasklet);
-
- kfree_skb(vcc_data->sarb);
- vcc_data->sarb = NULL;
-
- kfree(vcc_data);
- vcc->dev_data = NULL;
-
- vcc->vpi = ATM_VPI_UNSPEC;
- vcc->vci = ATM_VCI_UNSPEC;
- clear_bit(ATM_VF_READY, &vcc->flags);
- clear_bit(ATM_VF_PARTIAL, &vcc->flags);
- clear_bit(ATM_VF_ADDR, &vcc->flags);
-
- up(&instance->serialize);
-
- dbg("udsl_atm_close successful");
-}
-
-static int udsl_atm_ioctl(struct atm_dev *dev, unsigned int cmd,
- void __user * arg)
-{
- switch (cmd) {
- case ATM_QUERYLOOP:
- return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0;
- default:
- return -ENOIOCTLCMD;
- }
-}
-
-/**********
-** USB **
-**********/
-
-int udsl_instance_setup(struct usb_device *dev,
- struct udsl_instance_data *instance)
-{
- char *buf;
- int i, length;
-
- kref_init(&instance->refcount); /* one for USB */
- udsl_get_instance(instance); /* one for ATM */
-
- init_MUTEX(&instance->serialize);
-
- instance->usb_dev = dev;
-
- INIT_LIST_HEAD(&instance->vcc_list);
-
- instance->status = UDSL_NO_FIRMWARE;
- init_waitqueue_head(&instance->firmware_waiters);
-
- spin_lock_init(&instance->receive_lock);
- INIT_LIST_HEAD(&instance->spare_receivers);
- INIT_LIST_HEAD(&instance->filled_receive_buffers);
-
- tasklet_init(&instance->receive_tasklet, udsl_process_receive, (unsigned long)instance);
- INIT_LIST_HEAD(&instance->spare_receive_buffers);
-
- skb_queue_head_init(&instance->sndqueue);
-
- spin_lock_init(&instance->send_lock);
- INIT_LIST_HEAD(&instance->spare_senders);
- INIT_LIST_HEAD(&instance->spare_send_buffers);
-
- tasklet_init(&instance->send_tasklet, udsl_process_send,
- (unsigned long)instance);
- INIT_LIST_HEAD(&instance->filled_send_buffers);
-
- /* receive init */
- for (i = 0; i < num_rcv_urbs; i++) {
- struct udsl_receiver *rcv = &(instance->receivers[i]);
-
- if (!(rcv->urb = usb_alloc_urb(0, GFP_KERNEL))) {
- dbg("udsl_usb_probe: no memory for receive urb %d!", i);
- goto fail;
- }
-
- rcv->instance = instance;
-
- list_add(&rcv->list, &instance->spare_receivers);
- }
-
- for (i = 0; i < num_rcv_bufs; i++) {
- struct udsl_receive_buffer *buf =
- &(instance->receive_buffers[i]);
-
- buf->base = kmalloc(rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding),
- GFP_KERNEL);
- if (!buf->base) {
- dbg("udsl_usb_probe: no memory for receive buffer %d!", i);
- goto fail;
- }
-
- list_add(&buf->list, &instance->spare_receive_buffers);
- }
-
- /* send init */
- for (i = 0; i < num_snd_urbs; i++) {
- struct udsl_sender *snd = &(instance->senders[i]);
-
- if (!(snd->urb = usb_alloc_urb(0, GFP_KERNEL))) {
- dbg("udsl_usb_probe: no memory for send urb %d!", i);
- goto fail;
- }
-
- snd->instance = instance;
-
- list_add(&snd->list, &instance->spare_senders);
- }
-
- for (i = 0; i < num_snd_bufs; i++) {
- struct udsl_send_buffer *buf = &(instance->send_buffers[i]);
-
- buf->base = kmalloc(snd_buf_size * (ATM_CELL_SIZE + instance->snd_padding),
- GFP_KERNEL);
- if (!buf->base) {
- dbg("udsl_usb_probe: no memory for send buffer %d!", i);
- goto fail;
- }
-
- list_add(&buf->list, &instance->spare_send_buffers);
- }
-
- /* ATM init */
- instance->atm_dev = atm_dev_register(instance->driver_name,
- &udsl_atm_devops, -1, NULL);
- if (!instance->atm_dev) {
- dbg("udsl_usb_probe: failed to register ATM device!");
- goto fail;
- }
-
- instance->atm_dev->ci_range.vpi_bits = ATM_CI_MAX;
- instance->atm_dev->ci_range.vci_bits = ATM_CI_MAX;
- instance->atm_dev->signal = ATM_PHY_SIG_UNKNOWN;
-
- /* temp init ATM device, set to 128kbit */
- instance->atm_dev->link_rate = 128 * 1000 / 424;
-
- /* device description */
- buf = instance->description;
- length = sizeof(instance->description);
-
- if ((i = usb_string(dev, dev->descriptor.iProduct, buf, length)) < 0)
- goto finish;
-
- buf += i;
- length -= i;
-
- i = scnprintf(buf, length, " (");
- buf += i;
- length -= i;
-
- if (length <= 0 || (i = usb_make_path(dev, buf, length)) < 0)
- goto finish;
-
- buf += i;
- length -= i;
-
- snprintf(buf, length, ")");
-
- finish:
- /* ready for ATM callbacks */
- wmb();
- instance->atm_dev->dev_data = instance;
-
- usb_get_dev(dev);
-
- return 0;
-
- fail:
- for (i = 0; i < num_snd_bufs; i++)
- kfree(instance->send_buffers[i].base);
-
- for (i = 0; i < num_snd_urbs; i++)
- usb_free_urb(instance->senders[i].urb);
-
- for (i = 0; i < num_rcv_bufs; i++)
- kfree(instance->receive_buffers[i].base);
-
- for (i = 0; i < num_rcv_urbs; i++)
- usb_free_urb(instance->receivers[i].urb);
-
- return -ENOMEM;
-}
-
-void udsl_instance_disconnect(struct udsl_instance_data *instance)
-{
- int i;
-
- dbg("udsl_instance_disconnect entered");
-
- if (!instance) {
- dbg("udsl_instance_disconnect: NULL instance!");
- return;
- }
-
- /* receive finalize */
- tasklet_disable(&instance->receive_tasklet);
-
- for (i = 0; i < num_rcv_urbs; i++)
- usb_kill_urb(instance->receivers[i].urb);
-
- /* no need to take the spinlock */
- INIT_LIST_HEAD(&instance->filled_receive_buffers);
- INIT_LIST_HEAD(&instance->spare_receive_buffers);
-
- tasklet_enable(&instance->receive_tasklet);
-
- for (i = 0; i < num_rcv_urbs; i++)
- usb_free_urb(instance->receivers[i].urb);
-
- for (i = 0; i < num_rcv_bufs; i++)
- kfree(instance->receive_buffers[i].base);
-
- /* send finalize */
- tasklet_disable(&instance->send_tasklet);
-
- for (i = 0; i < num_snd_urbs; i++)
- usb_kill_urb(instance->senders[i].urb);
-
- /* no need to take the spinlock */
- INIT_LIST_HEAD(&instance->spare_senders);
- INIT_LIST_HEAD(&instance->spare_send_buffers);
- instance->current_buffer = NULL;
-
- tasklet_enable(&instance->send_tasklet);
-
- for (i = 0; i < num_snd_urbs; i++)
- usb_free_urb(instance->senders[i].urb);
-
- for (i = 0; i < num_snd_bufs; i++)
- kfree(instance->send_buffers[i].base);
-
- /* ATM finalize */
- shutdown_atm_dev(instance->atm_dev);
-}
-
-EXPORT_SYMBOL_GPL(udsl_get_instance);
-EXPORT_SYMBOL_GPL(udsl_put_instance);
-EXPORT_SYMBOL_GPL(udsl_instance_setup);
-EXPORT_SYMBOL_GPL(udsl_instance_disconnect);
-
-/***********
-** init **
-***********/
-
-static int __init udsl_usb_init(void)
-{
- dbg("udsl_usb_init: driver version " DRIVER_VERSION);
-
- if (sizeof(struct udsl_control) > sizeof(((struct sk_buff *) 0)->cb)) {
- printk(KERN_ERR __FILE__ ": unusable with this kernel!\n");
- return -EIO;
- }
-
- if ((num_rcv_urbs > UDSL_MAX_RCV_URBS)
- || (num_snd_urbs > UDSL_MAX_SND_URBS)
- || (num_rcv_bufs > UDSL_MAX_RCV_BUFS)
- || (num_snd_bufs > UDSL_MAX_SND_BUFS)
- || (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE)
- || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE))
- return -EINVAL;
-
- return 0;
-}
-
-static void __exit udsl_usb_exit(void)
-{
-}
-
-module_init(udsl_usb_init);
-module_exit(udsl_usb_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRIVER_VERSION);
-
-/************
-** debug **
-************/
-
-#ifdef VERBOSE_DEBUG
-static int udsl_print_packet(const unsigned char *data, int len)
-{
- unsigned char buffer[256];
- int i = 0, j = 0;
-
- for (i = 0; i < len;) {
- buffer[0] = '\0';
- sprintf(buffer, "%.3d :", i);
- for (j = 0; (j < 16) && (i < len); j++, i++) {
- sprintf(buffer, "%s %2.2x", buffer, data[i]);
- }
- dbg("%s", buffer);
- }
- return i;
-}
-#endif