From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/s390/net/lcs.c | 2347 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 2347 insertions(+) create mode 100644 drivers/s390/net/lcs.c (limited to 'drivers/s390/net/lcs.c') diff --git a/drivers/s390/net/lcs.c b/drivers/s390/net/lcs.c new file mode 100644 index 000000000000..0f76e945b984 --- /dev/null +++ b/drivers/s390/net/lcs.c @@ -0,0 +1,2347 @@ +/* + * linux/drivers/s390/net/lcs.c + * + * Linux for S/390 Lan Channel Station Network Driver + * + * Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH, + * IBM Corporation + * Author(s): Original Code written by + * DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com) + * Rewritten by + * Frank Pavlic (pavlic@de.ibm.com) and + * Martin Schwidefsky + * + * $Revision: 1.96 $ $Date: 2004/11/11 13:42:33 $ + * + * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include "lcs.h" +#include "cu3088.h" + + +#if !defined(CONFIG_NET_ETHERNET) && \ + !defined(CONFIG_TR) && !defined(CONFIG_FDDI) +#error Cannot compile lcs.c without some net devices switched on. +#endif + +/** + * initialization string for output + */ +#define VERSION_LCS_C "$Revision: 1.96 $" + +static char version[] __initdata = "LCS driver ("VERSION_LCS_C "/" VERSION_LCS_H ")"; +static char debug_buffer[255]; + +/** + * Some prototypes. + */ +static void lcs_tasklet(unsigned long); +static void lcs_start_kernel_thread(struct lcs_card *card); +static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *); +static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *); + +/** + * Debug Facility Stuff + */ +static debug_info_t *lcs_dbf_setup; +static debug_info_t *lcs_dbf_trace; + +/** + * LCS Debug Facility functions + */ +static void +lcs_unregister_debug_facility(void) +{ + if (lcs_dbf_setup) + debug_unregister(lcs_dbf_setup); + if (lcs_dbf_trace) + debug_unregister(lcs_dbf_trace); +} + +static int +lcs_register_debug_facility(void) +{ + lcs_dbf_setup = debug_register("lcs_setup", 1, 1, 8); + lcs_dbf_trace = debug_register("lcs_trace", 1, 2, 8); + if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) { + PRINT_ERR("Not enough memory for debug facility.\n"); + lcs_unregister_debug_facility(); + return -ENOMEM; + } + debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view); + debug_set_level(lcs_dbf_setup, 4); + debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view); + debug_set_level(lcs_dbf_trace, 4); + return 0; +} + +/** + * Allocate io buffers. + */ +static int +lcs_alloc_channel(struct lcs_channel *channel) +{ + int cnt; + + LCS_DBF_TEXT(2, setup, "ichalloc"); + for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { + /* alloc memory fo iobuffer */ + channel->iob[cnt].data = (void *) + kmalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL); + if (channel->iob[cnt].data == NULL) + break; + memset(channel->iob[cnt].data, 0, LCS_IOBUFFERSIZE); + channel->iob[cnt].state = BUF_STATE_EMPTY; + } + if (cnt < LCS_NUM_BUFFS) { + /* Not all io buffers could be allocated. */ + LCS_DBF_TEXT(2, setup, "echalloc"); + while (cnt-- > 0) + kfree(channel->iob[cnt].data); + return -ENOMEM; + } + return 0; +} + +/** + * Free io buffers. + */ +static void +lcs_free_channel(struct lcs_channel *channel) +{ + int cnt; + + LCS_DBF_TEXT(2, setup, "ichfree"); + for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { + if (channel->iob[cnt].data != NULL) + kfree(channel->iob[cnt].data); + channel->iob[cnt].data = NULL; + } +} + +/* + * Cleanup channel. + */ +static void +lcs_cleanup_channel(struct lcs_channel *channel) +{ + LCS_DBF_TEXT(3, setup, "cleanch"); + /* Kill write channel tasklets. */ + tasklet_kill(&channel->irq_tasklet); + /* Free channel buffers. */ + lcs_free_channel(channel); +} + +/** + * LCS free memory for card and channels. + */ +static void +lcs_free_card(struct lcs_card *card) +{ + LCS_DBF_TEXT(2, setup, "remcard"); + LCS_DBF_HEX(2, setup, &card, sizeof(void*)); + kfree(card); +} + +/** + * LCS alloc memory for card and channels + */ +static struct lcs_card * +lcs_alloc_card(void) +{ + struct lcs_card *card; + int rc; + + LCS_DBF_TEXT(2, setup, "alloclcs"); + + card = kmalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA); + if (card == NULL) + return NULL; + memset(card, 0, sizeof(struct lcs_card)); + card->lan_type = LCS_FRAME_TYPE_AUTO; + card->pkt_seq = 0; + card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT; + /* Allocate io buffers for the read channel. */ + rc = lcs_alloc_channel(&card->read); + if (rc){ + LCS_DBF_TEXT(2, setup, "iccwerr"); + lcs_free_card(card); + return NULL; + } + /* Allocate io buffers for the write channel. */ + rc = lcs_alloc_channel(&card->write); + if (rc) { + LCS_DBF_TEXT(2, setup, "iccwerr"); + lcs_cleanup_channel(&card->read); + lcs_free_card(card); + return NULL; + } + +#ifdef CONFIG_IP_MULTICAST + INIT_LIST_HEAD(&card->ipm_list); +#endif + LCS_DBF_HEX(2, setup, &card, sizeof(void*)); + return card; +} + +/* + * Setup read channel. + */ +static void +lcs_setup_read_ccws(struct lcs_card *card) +{ + int cnt; + + LCS_DBF_TEXT(2, setup, "ireadccw"); + /* Setup read ccws. */ + memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1)); + for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { + card->read.ccws[cnt].cmd_code = LCS_CCW_READ; + card->read.ccws[cnt].count = LCS_IOBUFFERSIZE; + card->read.ccws[cnt].flags = + CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI; + /* + * Note: we have allocated the buffer with GFP_DMA, so + * we do not need to do set_normalized_cda. + */ + card->read.ccws[cnt].cda = + (__u32) __pa(card->read.iob[cnt].data); + ((struct lcs_header *) + card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET; + card->read.iob[cnt].callback = lcs_get_frames_cb; + card->read.iob[cnt].state = BUF_STATE_READY; + card->read.iob[cnt].count = LCS_IOBUFFERSIZE; + } + card->read.ccws[0].flags &= ~CCW_FLAG_PCI; + card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI; + card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND; + /* Last ccw is a tic (transfer in channel). */ + card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; + card->read.ccws[LCS_NUM_BUFFS].cda = + (__u32) __pa(card->read.ccws); + /* Setg initial state of the read channel. */ + card->read.state = CH_STATE_INIT; + + card->read.io_idx = 0; + card->read.buf_idx = 0; +} + +static void +lcs_setup_read(struct lcs_card *card) +{ + LCS_DBF_TEXT(3, setup, "initread"); + + lcs_setup_read_ccws(card); + /* Initialize read channel tasklet. */ + card->read.irq_tasklet.data = (unsigned long) &card->read; + card->read.irq_tasklet.func = lcs_tasklet; + /* Initialize waitqueue. */ + init_waitqueue_head(&card->read.wait_q); +} + +/* + * Setup write channel. + */ +static void +lcs_setup_write_ccws(struct lcs_card *card) +{ + int cnt; + + LCS_DBF_TEXT(3, setup, "iwritccw"); + /* Setup write ccws. */ + memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1); + for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) { + card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE; + card->write.ccws[cnt].count = 0; + card->write.ccws[cnt].flags = + CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI; + /* + * Note: we have allocated the buffer with GFP_DMA, so + * we do not need to do set_normalized_cda. + */ + card->write.ccws[cnt].cda = + (__u32) __pa(card->write.iob[cnt].data); + } + /* Last ccw is a tic (transfer in channel). */ + card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER; + card->write.ccws[LCS_NUM_BUFFS].cda = + (__u32) __pa(card->write.ccws); + /* Set initial state of the write channel. */ + card->read.state = CH_STATE_INIT; + + card->write.io_idx = 0; + card->write.buf_idx = 0; +} + +static void +lcs_setup_write(struct lcs_card *card) +{ + LCS_DBF_TEXT(3, setup, "initwrit"); + + lcs_setup_write_ccws(card); + /* Initialize write channel tasklet. */ + card->write.irq_tasklet.data = (unsigned long) &card->write; + card->write.irq_tasklet.func = lcs_tasklet; + /* Initialize waitqueue. */ + init_waitqueue_head(&card->write.wait_q); +} + +static void +lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads) +{ + unsigned long flags; + + spin_lock_irqsave(&card->mask_lock, flags); + card->thread_allowed_mask = threads; + spin_unlock_irqrestore(&card->mask_lock, flags); + wake_up(&card->wait_q); +} +static inline int +lcs_threads_running(struct lcs_card *card, unsigned long threads) +{ + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&card->mask_lock, flags); + rc = (card->thread_running_mask & threads); + spin_unlock_irqrestore(&card->mask_lock, flags); + return rc; +} + +static int +lcs_wait_for_threads(struct lcs_card *card, unsigned long threads) +{ + return wait_event_interruptible(card->wait_q, + lcs_threads_running(card, threads) == 0); +} + +static inline int +lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread) +{ + unsigned long flags; + + spin_lock_irqsave(&card->mask_lock, flags); + if ( !(card->thread_allowed_mask & thread) || + (card->thread_start_mask & thread) ) { + spin_unlock_irqrestore(&card->mask_lock, flags); + return -EPERM; + } + card->thread_start_mask |= thread; + spin_unlock_irqrestore(&card->mask_lock, flags); + return 0; +} + +static void +lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread) +{ + unsigned long flags; + + spin_lock_irqsave(&card->mask_lock, flags); + card->thread_running_mask &= ~thread; + spin_unlock_irqrestore(&card->mask_lock, flags); + wake_up(&card->wait_q); +} + +static inline int +__lcs_do_run_thread(struct lcs_card *card, unsigned long thread) +{ + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&card->mask_lock, flags); + if (card->thread_start_mask & thread){ + if ((card->thread_allowed_mask & thread) && + !(card->thread_running_mask & thread)){ + rc = 1; + card->thread_start_mask &= ~thread; + card->thread_running_mask |= thread; + } else + rc = -EPERM; + } + spin_unlock_irqrestore(&card->mask_lock, flags); + return rc; +} + +static int +lcs_do_run_thread(struct lcs_card *card, unsigned long thread) +{ + int rc = 0; + wait_event(card->wait_q, + (rc = __lcs_do_run_thread(card, thread)) >= 0); + return rc; +} + +static int +lcs_do_start_thread(struct lcs_card *card, unsigned long thread) +{ + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&card->mask_lock, flags); + LCS_DBF_TEXT_(4, trace, " %02x%02x%02x", + (u8) card->thread_start_mask, + (u8) card->thread_allowed_mask, + (u8) card->thread_running_mask); + rc = (card->thread_start_mask & thread); + spin_unlock_irqrestore(&card->mask_lock, flags); + return rc; +} + +/** + * Initialize channels,card and state machines. + */ +static void +lcs_setup_card(struct lcs_card *card) +{ + LCS_DBF_TEXT(2, setup, "initcard"); + LCS_DBF_HEX(2, setup, &card, sizeof(void*)); + + lcs_setup_read(card); + lcs_setup_write(card); + /* Set cards initial state. */ + card->state = DEV_STATE_DOWN; + card->tx_buffer = NULL; + card->tx_emitted = 0; + + /* Initialize kernel thread task used for LGW commands. */ + INIT_WORK(&card->kernel_thread_starter, + (void *)lcs_start_kernel_thread,card); + card->thread_start_mask = 0; + card->thread_allowed_mask = 0; + card->thread_running_mask = 0; + init_waitqueue_head(&card->wait_q); + spin_lock_init(&card->lock); + spin_lock_init(&card->ipm_lock); + spin_lock_init(&card->mask_lock); +#ifdef CONFIG_IP_MULTICAST + INIT_LIST_HEAD(&card->ipm_list); +#endif + INIT_LIST_HEAD(&card->lancmd_waiters); +} + +static inline void +lcs_clear_multicast_list(struct lcs_card *card) +{ +#ifdef CONFIG_IP_MULTICAST + struct lcs_ipm_list *ipm; + unsigned long flags; + + /* Free multicast list. */ + LCS_DBF_TEXT(3, setup, "clmclist"); + spin_lock_irqsave(&card->ipm_lock, flags); + while (!list_empty(&card->ipm_list)){ + ipm = list_entry(card->ipm_list.next, + struct lcs_ipm_list, list); + list_del(&ipm->list); + if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){ + spin_unlock_irqrestore(&card->ipm_lock, flags); + lcs_send_delipm(card, ipm); + spin_lock_irqsave(&card->ipm_lock, flags); + } + kfree(ipm); + } + spin_unlock_irqrestore(&card->ipm_lock, flags); +#endif +} +/** + * Cleanup channels,card and state machines. + */ +static void +lcs_cleanup_card(struct lcs_card *card) +{ + + LCS_DBF_TEXT(3, setup, "cleancrd"); + LCS_DBF_HEX(2,setup,&card,sizeof(void*)); + + if (card->dev != NULL) + free_netdev(card->dev); + /* Cleanup channels. */ + lcs_cleanup_channel(&card->write); + lcs_cleanup_channel(&card->read); +} + +/** + * Start channel. + */ +static int +lcs_start_channel(struct lcs_channel *channel) +{ + unsigned long flags; + int rc; + + LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_start(channel->ccwdev, + channel->ccws + channel->io_idx, 0, 0, + DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND); + if (rc == 0) + channel->state = CH_STATE_RUNNING; + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + if (rc) { + LCS_DBF_TEXT_(4,trace,"essh%s", channel->ccwdev->dev.bus_id); + PRINT_ERR("Error in starting channel, rc=%d!\n", rc); + } + return rc; +} + +static int +lcs_clear_channel(struct lcs_channel *channel) +{ + unsigned long flags; + int rc; + + LCS_DBF_TEXT(4,trace,"clearch"); + LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_clear(channel->ccwdev, (addr_t) channel); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + if (rc) { + LCS_DBF_TEXT_(4,trace,"ecsc%s", channel->ccwdev->dev.bus_id); + return rc; + } + wait_event(channel->wait_q, (channel->state == CH_STATE_CLEARED)); + channel->state = CH_STATE_STOPPED; + return rc; +} + + +/** + * Stop channel. + */ +static int +lcs_stop_channel(struct lcs_channel *channel) +{ + unsigned long flags; + int rc; + + if (channel->state == CH_STATE_STOPPED) + return 0; + LCS_DBF_TEXT(4,trace,"haltsch"); + LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id); + channel->state = CH_STATE_INIT; + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + rc = ccw_device_halt(channel->ccwdev, (addr_t) channel); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + if (rc) { + LCS_DBF_TEXT_(4,trace,"ehsc%s", channel->ccwdev->dev.bus_id); + return rc; + } + /* Asynchronous halt initialted. Wait for its completion. */ + wait_event(channel->wait_q, (channel->state == CH_STATE_HALTED)); + lcs_clear_channel(channel); + return 0; +} + +/** + * start read and write channel + */ +static int +lcs_start_channels(struct lcs_card *card) +{ + int rc; + + LCS_DBF_TEXT(2, trace, "chstart"); + /* start read channel */ + rc = lcs_start_channel(&card->read); + if (rc) + return rc; + /* start write channel */ + rc = lcs_start_channel(&card->write); + if (rc) + lcs_stop_channel(&card->read); + return rc; +} + +/** + * stop read and write channel + */ +static int +lcs_stop_channels(struct lcs_card *card) +{ + LCS_DBF_TEXT(2, trace, "chhalt"); + lcs_stop_channel(&card->read); + lcs_stop_channel(&card->write); + return 0; +} + +/** + * Get empty buffer. + */ +static struct lcs_buffer * +__lcs_get_buffer(struct lcs_channel *channel) +{ + int index; + + LCS_DBF_TEXT(5, trace, "_getbuff"); + index = channel->io_idx; + do { + if (channel->iob[index].state == BUF_STATE_EMPTY) { + channel->iob[index].state = BUF_STATE_LOCKED; + return channel->iob + index; + } + index = (index + 1) & (LCS_NUM_BUFFS - 1); + } while (index != channel->io_idx); + return NULL; +} + +static struct lcs_buffer * +lcs_get_buffer(struct lcs_channel *channel) +{ + struct lcs_buffer *buffer; + unsigned long flags; + + LCS_DBF_TEXT(5, trace, "getbuff"); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + buffer = __lcs_get_buffer(channel); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + return buffer; +} + +/** + * Resume channel program if the channel is suspended. + */ +static int +__lcs_resume_channel(struct lcs_channel *channel) +{ + int rc; + + if (channel->state != CH_STATE_SUSPENDED) + return 0; + if (channel->ccws[channel->io_idx].flags & CCW_FLAG_SUSPEND) + return 0; + LCS_DBF_TEXT_(5, trace, "rsch%s", channel->ccwdev->dev.bus_id); + rc = ccw_device_resume(channel->ccwdev); + if (rc) { + LCS_DBF_TEXT_(4, trace, "ersc%s", channel->ccwdev->dev.bus_id); + PRINT_ERR("Error in lcs_resume_channel: rc=%d\n",rc); + } else + channel->state = CH_STATE_RUNNING; + return rc; + +} + +/** + * Make a buffer ready for processing. + */ +static inline void +__lcs_ready_buffer_bits(struct lcs_channel *channel, int index) +{ + int prev, next; + + LCS_DBF_TEXT(5, trace, "rdybits"); + prev = (index - 1) & (LCS_NUM_BUFFS - 1); + next = (index + 1) & (LCS_NUM_BUFFS - 1); + /* Check if we may clear the suspend bit of this buffer. */ + if (channel->ccws[next].flags & CCW_FLAG_SUSPEND) { + /* Check if we have to set the PCI bit. */ + if (!(channel->ccws[prev].flags & CCW_FLAG_SUSPEND)) + /* Suspend bit of the previous buffer is not set. */ + channel->ccws[index].flags |= CCW_FLAG_PCI; + /* Suspend bit of the next buffer is set. */ + channel->ccws[index].flags &= ~CCW_FLAG_SUSPEND; + } +} + +static int +lcs_ready_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) +{ + unsigned long flags; + int index, rc; + + LCS_DBF_TEXT(5, trace, "rdybuff"); + if (buffer->state != BUF_STATE_LOCKED && + buffer->state != BUF_STATE_PROCESSED) + BUG(); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + buffer->state = BUF_STATE_READY; + index = buffer - channel->iob; + /* Set length. */ + channel->ccws[index].count = buffer->count; + /* Check relevant PCI/suspend bits. */ + __lcs_ready_buffer_bits(channel, index); + rc = __lcs_resume_channel(channel); + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + return rc; +} + +/** + * Mark the buffer as processed. Take care of the suspend bit + * of the previous buffer. This function is called from + * interrupt context, so the lock must not be taken. + */ +static int +__lcs_processed_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) +{ + int index, prev, next; + + LCS_DBF_TEXT(5, trace, "prcsbuff"); + if (buffer->state != BUF_STATE_READY) + BUG(); + buffer->state = BUF_STATE_PROCESSED; + index = buffer - channel->iob; + prev = (index - 1) & (LCS_NUM_BUFFS - 1); + next = (index + 1) & (LCS_NUM_BUFFS - 1); + /* Set the suspend bit and clear the PCI bit of this buffer. */ + channel->ccws[index].flags |= CCW_FLAG_SUSPEND; + channel->ccws[index].flags &= ~CCW_FLAG_PCI; + /* Check the suspend bit of the previous buffer. */ + if (channel->iob[prev].state == BUF_STATE_READY) { + /* + * Previous buffer is in state ready. It might have + * happened in lcs_ready_buffer that the suspend bit + * has not been cleared to avoid an endless loop. + * Do it now. + */ + __lcs_ready_buffer_bits(channel, prev); + } + /* Clear PCI bit of next buffer. */ + channel->ccws[next].flags &= ~CCW_FLAG_PCI; + return __lcs_resume_channel(channel); +} + +/** + * Put a processed buffer back to state empty. + */ +static void +lcs_release_buffer(struct lcs_channel *channel, struct lcs_buffer *buffer) +{ + unsigned long flags; + + LCS_DBF_TEXT(5, trace, "relbuff"); + if (buffer->state != BUF_STATE_LOCKED && + buffer->state != BUF_STATE_PROCESSED) + BUG(); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + buffer->state = BUF_STATE_EMPTY; + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); +} + +/** + * Get buffer for a lan command. + */ +static struct lcs_buffer * +lcs_get_lancmd(struct lcs_card *card, int count) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(4, trace, "getlncmd"); + /* Get buffer and wait if none is available. */ + wait_event(card->write.wait_q, + ((buffer = lcs_get_buffer(&card->write)) != NULL)); + count += sizeof(struct lcs_header); + *(__u16 *)(buffer->data + count) = 0; + buffer->count = count + sizeof(__u16); + buffer->callback = lcs_release_buffer; + cmd = (struct lcs_cmd *) buffer->data; + cmd->offset = count; + cmd->type = LCS_FRAME_TYPE_CONTROL; + cmd->slot = 0; + return buffer; +} + + +static void +lcs_get_reply(struct lcs_reply *reply) +{ + WARN_ON(atomic_read(&reply->refcnt) <= 0); + atomic_inc(&reply->refcnt); +} + +static void +lcs_put_reply(struct lcs_reply *reply) +{ + WARN_ON(atomic_read(&reply->refcnt) <= 0); + if (atomic_dec_and_test(&reply->refcnt)) { + kfree(reply); + } + +} + +static struct lcs_reply * +lcs_alloc_reply(struct lcs_cmd *cmd) +{ + struct lcs_reply *reply; + + LCS_DBF_TEXT(4, trace, "getreply"); + + reply = kmalloc(sizeof(struct lcs_reply), GFP_ATOMIC); + if (!reply) + return NULL; + memset(reply,0,sizeof(struct lcs_reply)); + atomic_set(&reply->refcnt,1); + reply->sequence_no = cmd->sequence_no; + reply->received = 0; + reply->rc = 0; + init_waitqueue_head(&reply->wait_q); + + return reply; +} + +/** + * Notifier function for lancmd replies. Called from read irq. + */ +static void +lcs_notify_lancmd_waiters(struct lcs_card *card, struct lcs_cmd *cmd) +{ + struct list_head *l, *n; + struct lcs_reply *reply; + + LCS_DBF_TEXT(4, trace, "notiwait"); + spin_lock(&card->lock); + list_for_each_safe(l, n, &card->lancmd_waiters) { + reply = list_entry(l, struct lcs_reply, list); + if (reply->sequence_no == cmd->sequence_no) { + lcs_get_reply(reply); + list_del_init(&reply->list); + if (reply->callback != NULL) + reply->callback(card, cmd); + reply->received = 1; + reply->rc = cmd->return_code; + wake_up(&reply->wait_q); + lcs_put_reply(reply); + break; + } + } + spin_unlock(&card->lock); +} + +/** + * Emit buffer of a lan comand. + */ +void +lcs_lancmd_timeout(unsigned long data) +{ + struct lcs_reply *reply, *list_reply, *r; + unsigned long flags; + + LCS_DBF_TEXT(4, trace, "timeout"); + reply = (struct lcs_reply *) data; + spin_lock_irqsave(&reply->card->lock, flags); + list_for_each_entry_safe(list_reply, r, + &reply->card->lancmd_waiters,list) { + if (reply == list_reply) { + lcs_get_reply(reply); + list_del_init(&reply->list); + spin_unlock_irqrestore(&reply->card->lock, flags); + reply->received = 1; + reply->rc = -ETIME; + wake_up(&reply->wait_q); + lcs_put_reply(reply); + return; + } + } + spin_unlock_irqrestore(&reply->card->lock, flags); +} + +static int +lcs_send_lancmd(struct lcs_card *card, struct lcs_buffer *buffer, + void (*reply_callback)(struct lcs_card *, struct lcs_cmd *)) +{ + struct lcs_reply *reply; + struct lcs_cmd *cmd; + struct timer_list timer; + unsigned long flags; + int rc; + + LCS_DBF_TEXT(4, trace, "sendcmd"); + cmd = (struct lcs_cmd *) buffer->data; + cmd->return_code = 0; + cmd->sequence_no = card->sequence_no++; + reply = lcs_alloc_reply(cmd); + if (!reply) + return -ENOMEM; + reply->callback = reply_callback; + reply->card = card; + spin_lock_irqsave(&card->lock, flags); + list_add_tail(&reply->list, &card->lancmd_waiters); + spin_unlock_irqrestore(&card->lock, flags); + + buffer->callback = lcs_release_buffer; + rc = lcs_ready_buffer(&card->write, buffer); + if (rc) + return rc; + init_timer(&timer); + timer.function = lcs_lancmd_timeout; + timer.data = (unsigned long) reply; + timer.expires = jiffies + HZ*card->lancmd_timeout; + add_timer(&timer); + wait_event(reply->wait_q, reply->received); + del_timer_sync(&timer); + LCS_DBF_TEXT_(4, trace, "rc:%d",reply->rc); + rc = reply->rc; + lcs_put_reply(reply); + return rc ? -EIO : 0; +} + +/** + * LCS startup command + */ +static int +lcs_send_startup(struct lcs_card *card, __u8 initiator) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "startup"); + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_STARTUP; + cmd->initiator = initiator; + cmd->cmd.lcs_startup.buff_size = LCS_IOBUFFERSIZE; + return lcs_send_lancmd(card, buffer, NULL); +} + +/** + * LCS shutdown command + */ +static int +lcs_send_shutdown(struct lcs_card *card) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "shutdown"); + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_SHUTDOWN; + cmd->initiator = LCS_INITIATOR_TCPIP; + return lcs_send_lancmd(card, buffer, NULL); +} + +/** + * LCS lanstat command + */ +static void +__lcs_lanstat_cb(struct lcs_card *card, struct lcs_cmd *cmd) +{ + LCS_DBF_TEXT(2, trace, "statcb"); + memcpy(card->mac, cmd->cmd.lcs_lanstat_cmd.mac_addr, LCS_MAC_LENGTH); +} + +static int +lcs_send_lanstat(struct lcs_card *card) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2,trace, "cmdstat"); + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + /* Setup lanstat command. */ + cmd->cmd_code = LCS_CMD_LANSTAT; + cmd->initiator = LCS_INITIATOR_TCPIP; + cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; + cmd->cmd.lcs_std_cmd.portno = card->portno; + return lcs_send_lancmd(card, buffer, __lcs_lanstat_cb); +} + +/** + * send stoplan command + */ +static int +lcs_send_stoplan(struct lcs_card *card, __u8 initiator) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "cmdstpln"); + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_STOPLAN; + cmd->initiator = initiator; + cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; + cmd->cmd.lcs_std_cmd.portno = card->portno; + return lcs_send_lancmd(card, buffer, NULL); +} + +/** + * send startlan command + */ +static void +__lcs_send_startlan_cb(struct lcs_card *card, struct lcs_cmd *cmd) +{ + LCS_DBF_TEXT(2, trace, "srtlancb"); + card->lan_type = cmd->cmd.lcs_std_cmd.lan_type; + card->portno = cmd->cmd.lcs_std_cmd.portno; +} + +static int +lcs_send_startlan(struct lcs_card *card, __u8 initiator) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "cmdstaln"); + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_STARTLAN; + cmd->initiator = initiator; + cmd->cmd.lcs_std_cmd.lan_type = card->lan_type; + cmd->cmd.lcs_std_cmd.portno = card->portno; + return lcs_send_lancmd(card, buffer, __lcs_send_startlan_cb); +} + +#ifdef CONFIG_IP_MULTICAST +/** + * send setipm command (Multicast) + */ +static int +lcs_send_setipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "cmdsetim"); + buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_SETIPM; + cmd->initiator = LCS_INITIATOR_TCPIP; + cmd->cmd.lcs_qipassist.lan_type = card->lan_type; + cmd->cmd.lcs_qipassist.portno = card->portno; + cmd->cmd.lcs_qipassist.version = 4; + cmd->cmd.lcs_qipassist.num_ip_pairs = 1; + memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, + &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); + LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); + return lcs_send_lancmd(card, buffer, NULL); +} + +/** + * send delipm command (Multicast) + */ +static int +lcs_send_delipm(struct lcs_card *card,struct lcs_ipm_list *ipm_list) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + + LCS_DBF_TEXT(2, trace, "cmddelim"); + buffer = lcs_get_lancmd(card, LCS_MULTICAST_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_DELIPM; + cmd->initiator = LCS_INITIATOR_TCPIP; + cmd->cmd.lcs_qipassist.lan_type = card->lan_type; + cmd->cmd.lcs_qipassist.portno = card->portno; + cmd->cmd.lcs_qipassist.version = 4; + cmd->cmd.lcs_qipassist.num_ip_pairs = 1; + memcpy(cmd->cmd.lcs_qipassist.lcs_ipass_ctlmsg.ip_mac_pair, + &ipm_list->ipm, sizeof (struct lcs_ip_mac_pair)); + LCS_DBF_TEXT_(2, trace, "%x",ipm_list->ipm.ip_addr); + return lcs_send_lancmd(card, buffer, NULL); +} + +/** + * check if multicast is supported by LCS + */ +static void +__lcs_check_multicast_cb(struct lcs_card *card, struct lcs_cmd *cmd) +{ + LCS_DBF_TEXT(2, trace, "chkmccb"); + card->ip_assists_supported = + cmd->cmd.lcs_qipassist.ip_assists_supported; + card->ip_assists_enabled = + cmd->cmd.lcs_qipassist.ip_assists_enabled; +} + +static int +lcs_check_multicast_support(struct lcs_card *card) +{ + struct lcs_buffer *buffer; + struct lcs_cmd *cmd; + int rc; + + LCS_DBF_TEXT(2, trace, "cmdqipa"); + /* Send query ipassist. */ + buffer = lcs_get_lancmd(card, LCS_STD_CMD_SIZE); + cmd = (struct lcs_cmd *) buffer->data; + cmd->cmd_code = LCS_CMD_QIPASSIST; + cmd->initiator = LCS_INITIATOR_TCPIP; + cmd->cmd.lcs_qipassist.lan_type = card->lan_type; + cmd->cmd.lcs_qipassist.portno = card->portno; + cmd->cmd.lcs_qipassist.version = 4; + cmd->cmd.lcs_qipassist.num_ip_pairs = 1; + rc = lcs_send_lancmd(card, buffer, __lcs_check_multicast_cb); + if (rc != 0) { + PRINT_ERR("Query IPAssist failed. Assuming unsupported!\n"); + return -EOPNOTSUPP; + } + /* Print out supported assists: IPv6 */ + PRINT_INFO("LCS device %s %s IPv6 support\n", card->dev->name, + (card->ip_assists_supported & LCS_IPASS_IPV6_SUPPORT) ? + "with" : "without"); + /* Print out supported assist: Multicast */ + PRINT_INFO("LCS device %s %s Multicast support\n", card->dev->name, + (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) ? + "with" : "without"); + if (card->ip_assists_supported & LCS_IPASS_MULTICAST_SUPPORT) + return 0; + return -EOPNOTSUPP; +} + +/** + * set or del multicast address on LCS card + */ +static void +lcs_fix_multicast_list(struct lcs_card *card) +{ + struct list_head failed_list; + struct lcs_ipm_list *ipm, *tmp; + unsigned long flags; + int rc; + + LCS_DBF_TEXT(4,trace, "fixipm"); + INIT_LIST_HEAD(&failed_list); + spin_lock_irqsave(&card->ipm_lock, flags); +list_modified: + list_for_each_entry_safe(ipm, tmp, &card->ipm_list, list){ + switch (ipm->ipm_state) { + case LCS_IPM_STATE_SET_REQUIRED: + /* del from ipm_list so noone else can tamper with + * this entry */ + list_del_init(&ipm->list); + spin_unlock_irqrestore(&card->ipm_lock, flags); + rc = lcs_send_setipm(card, ipm); + spin_lock_irqsave(&card->ipm_lock, flags); + if (rc) { + PRINT_INFO("Adding multicast address failed." + "Table possibly full!\n"); + /* store ipm in failed list -> will be added + * to ipm_list again, so a retry will be done + * during the next call of this function */ + list_add_tail(&ipm->list, &failed_list); + } else { + ipm->ipm_state = LCS_IPM_STATE_ON_CARD; + /* re-insert into ipm_list */ + list_add_tail(&ipm->list, &card->ipm_list); + } + goto list_modified; + case LCS_IPM_STATE_DEL_REQUIRED: + list_del(&ipm->list); + spin_unlock_irqrestore(&card->ipm_lock, flags); + lcs_send_delipm(card, ipm); + spin_lock_irqsave(&card->ipm_lock, flags); + kfree(ipm); + goto list_modified; + case LCS_IPM_STATE_ON_CARD: + break; + } + } + /* re-insert all entries from the failed_list into ipm_list */ + list_for_each_entry(ipm, &failed_list, list) { + list_del_init(&ipm->list); + list_add_tail(&ipm->list, &card->ipm_list); + } + spin_unlock_irqrestore(&card->ipm_lock, flags); + if (card->state == DEV_STATE_UP) + netif_wake_queue(card->dev); +} + +/** + * get mac address for the relevant Multicast address + */ +static void +lcs_get_mac_for_ipm(__u32 ipm, char *mac, struct net_device *dev) +{ + LCS_DBF_TEXT(4,trace, "getmac"); + if (dev->type == ARPHRD_IEEE802_TR) + ip_tr_mc_map(ipm, mac); + else + ip_eth_mc_map(ipm, mac); +} + +/** + * function called by net device to handle multicast address relevant things + */ +static inline void +lcs_remove_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) +{ + struct ip_mc_list *im4; + struct list_head *l; + struct lcs_ipm_list *ipm; + unsigned long flags; + char buf[MAX_ADDR_LEN]; + + LCS_DBF_TEXT(4, trace, "remmclst"); + spin_lock_irqsave(&card->ipm_lock, flags); + list_for_each(l, &card->ipm_list) { + ipm = list_entry(l, struct lcs_ipm_list, list); + for (im4 = in4_dev->mc_list; im4 != NULL; im4 = im4->next) { + lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); + if ( (ipm->ipm.ip_addr == im4->multiaddr) && + (memcmp(buf, &ipm->ipm.mac_addr, + LCS_MAC_LENGTH) == 0) ) + break; + } + if (im4 == NULL) + ipm->ipm_state = LCS_IPM_STATE_DEL_REQUIRED; + } + spin_unlock_irqrestore(&card->ipm_lock, flags); +} + +static inline struct lcs_ipm_list * +lcs_check_addr_entry(struct lcs_card *card, struct ip_mc_list *im4, char *buf) +{ + struct lcs_ipm_list *tmp, *ipm = NULL; + struct list_head *l; + unsigned long flags; + + LCS_DBF_TEXT(4, trace, "chkmcent"); + spin_lock_irqsave(&card->ipm_lock, flags); + list_for_each(l, &card->ipm_list) { + tmp = list_entry(l, struct lcs_ipm_list, list); + if ( (tmp->ipm.ip_addr == im4->multiaddr) && + (memcmp(buf, &tmp->ipm.mac_addr, + LCS_MAC_LENGTH) == 0) ) { + ipm = tmp; + break; + } + } + spin_unlock_irqrestore(&card->ipm_lock, flags); + return ipm; +} + +static inline void +lcs_set_mc_addresses(struct lcs_card *card, struct in_device *in4_dev) +{ + + struct ip_mc_list *im4; + struct lcs_ipm_list *ipm; + char buf[MAX_ADDR_LEN]; + unsigned long flags; + + LCS_DBF_TEXT(4, trace, "setmclst"); + for (im4 = in4_dev->mc_list; im4; im4 = im4->next) { + lcs_get_mac_for_ipm(im4->multiaddr, buf, card->dev); + ipm = lcs_check_addr_entry(card, im4, buf); + if (ipm != NULL) + continue; /* Address already in list. */ + ipm = (struct lcs_ipm_list *) + kmalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC); + if (ipm == NULL) { + PRINT_INFO("Not enough memory to add " + "new multicast entry!\n"); + break; + } + memset(ipm, 0, sizeof(struct lcs_ipm_list)); + memcpy(&ipm->ipm.mac_addr, buf, LCS_MAC_LENGTH); + ipm->ipm.ip_addr = im4->multiaddr; + ipm->ipm_state = LCS_IPM_STATE_SET_REQUIRED; + spin_lock_irqsave(&card->ipm_lock, flags); + list_add(&ipm->list, &card->ipm_list); + spin_unlock_irqrestore(&card->ipm_lock, flags); + } +} + +static int +lcs_register_mc_addresses(void *data) +{ + struct lcs_card *card; + struct in_device *in4_dev; + + card = (struct lcs_card *) data; + daemonize("regipm"); + + if (!lcs_do_run_thread(card, LCS_SET_MC_THREAD)) + return 0; + LCS_DBF_TEXT(4, trace, "regmulti"); + + in4_dev = in_dev_get(card->dev); + if (in4_dev == NULL) + goto out; + read_lock(&in4_dev->mc_list_lock); + lcs_remove_mc_addresses(card,in4_dev); + lcs_set_mc_addresses(card, in4_dev); + read_unlock(&in4_dev->mc_list_lock); + in_dev_put(in4_dev); + + lcs_fix_multicast_list(card); +out: + lcs_clear_thread_running_bit(card, LCS_SET_MC_THREAD); + return 0; +} +/** + * function called by net device to + * handle multicast address relevant things + */ +static void +lcs_set_multicast_list(struct net_device *dev) +{ + struct lcs_card *card; + + LCS_DBF_TEXT(4, trace, "setmulti"); + card = (struct lcs_card *) dev->priv; + + if (!lcs_set_thread_start_bit(card, LCS_SET_MC_THREAD)) { + schedule_work(&card->kernel_thread_starter); + } +} + +#endif /* CONFIG_IP_MULTICAST */ + +static long +lcs_check_irb_error(struct ccw_device *cdev, struct irb *irb) +{ + if (!IS_ERR(irb)) + return 0; + + switch (PTR_ERR(irb)) { + case -EIO: + PRINT_WARN("i/o-error on device %s\n", cdev->dev.bus_id); + LCS_DBF_TEXT(2, trace, "ckirberr"); + LCS_DBF_TEXT_(2, trace, " rc%d", -EIO); + break; + case -ETIMEDOUT: + PRINT_WARN("timeout on device %s\n", cdev->dev.bus_id); + LCS_DBF_TEXT(2, trace, "ckirberr"); + LCS_DBF_TEXT_(2, trace, " rc%d", -ETIMEDOUT); + break; + default: + PRINT_WARN("unknown error %ld on device %s\n", PTR_ERR(irb), + cdev->dev.bus_id); + LCS_DBF_TEXT(2, trace, "ckirberr"); + LCS_DBF_TEXT(2, trace, " rc???"); + } + return PTR_ERR(irb); +} + + +/** + * IRQ Handler for LCS channels + */ +static void +lcs_irq(struct ccw_device *cdev, unsigned long intparm, struct irb *irb) +{ + struct lcs_card *card; + struct lcs_channel *channel; + int index; + + if (lcs_check_irb_error(cdev, irb)) + return; + + card = CARD_FROM_DEV(cdev); + if (card->read.ccwdev == cdev) + channel = &card->read; + else + channel = &card->write; + + LCS_DBF_TEXT_(5, trace, "Rint%s",cdev->dev.bus_id); + LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.cstat, irb->scsw.dstat); + LCS_DBF_TEXT_(5, trace, "%4x%4x",irb->scsw.fctl, irb->scsw.actl); + + /* How far in the ccw chain have we processed? */ + if ((channel->state != CH_STATE_INIT) && + (irb->scsw.fctl & SCSW_FCTL_START_FUNC)) { + index = (struct ccw1 *) __va((addr_t) irb->scsw.cpa) + - channel->ccws; + if ((irb->scsw.actl & SCSW_ACTL_SUSPENDED) || + (irb->scsw.cstat | SCHN_STAT_PCI)) + /* Bloody io subsystem tells us lies about cpa... */ + index = (index - 1) & (LCS_NUM_BUFFS - 1); + while (channel->io_idx != index) { + __lcs_processed_buffer(channel, + channel->iob + channel->io_idx); + channel->io_idx = + (channel->io_idx + 1) & (LCS_NUM_BUFFS - 1); + } + } + + if ((irb->scsw.dstat & DEV_STAT_DEV_END) || + (irb->scsw.dstat & DEV_STAT_CHN_END) || + (irb->scsw.dstat & DEV_STAT_UNIT_CHECK)) + /* Mark channel as stopped. */ + channel->state = CH_STATE_STOPPED; + else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED) + /* CCW execution stopped on a suspend bit. */ + channel->state = CH_STATE_SUSPENDED; + + if (irb->scsw.fctl & SCSW_FCTL_HALT_FUNC) { + if (irb->scsw.cc != 0) { + ccw_device_halt(channel->ccwdev, (addr_t) channel); + return; + } + /* The channel has been stopped by halt_IO. */ + channel->state = CH_STATE_HALTED; + } + + if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) { + channel->state = CH_STATE_CLEARED; + } + /* Do the rest in the tasklet. */ + tasklet_schedule(&channel->irq_tasklet); +} + +/** + * Tasklet for IRQ handler + */ +static void +lcs_tasklet(unsigned long data) +{ + unsigned long flags; + struct lcs_channel *channel; + struct lcs_buffer *iob; + int buf_idx; + int rc; + + channel = (struct lcs_channel *) data; + LCS_DBF_TEXT_(5, trace, "tlet%s",channel->ccwdev->dev.bus_id); + + /* Check for processed buffers. */ + iob = channel->iob; + buf_idx = channel->buf_idx; + while (iob[buf_idx].state == BUF_STATE_PROCESSED) { + /* Do the callback thing. */ + if (iob[buf_idx].callback != NULL) + iob[buf_idx].callback(channel, iob + buf_idx); + buf_idx = (buf_idx + 1) & (LCS_NUM_BUFFS - 1); + } + channel->buf_idx = buf_idx; + + if (channel->state == CH_STATE_STOPPED) + // FIXME: what if rc != 0 ?? + rc = lcs_start_channel(channel); + spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags); + if (channel->state == CH_STATE_SUSPENDED && + channel->iob[channel->io_idx].state == BUF_STATE_READY) { + // FIXME: what if rc != 0 ?? + rc = __lcs_resume_channel(channel); + } + spin_unlock_irqrestore(get_ccwdev_lock(channel->ccwdev), flags); + + /* Something happened on the channel. Wake up waiters. */ + wake_up(&channel->wait_q); +} + +/** + * Finish current tx buffer and make it ready for transmit. + */ +static void +__lcs_emit_txbuffer(struct lcs_card *card) +{ + LCS_DBF_TEXT(5, trace, "emittx"); + *(__u16 *)(card->tx_buffer->data + card->tx_buffer->count) = 0; + card->tx_buffer->count += 2; + lcs_ready_buffer(&card->write, card->tx_buffer); + card->tx_buffer = NULL; + card->tx_emitted++; +} + +/** + * Callback for finished tx buffers. + */ +static void +lcs_txbuffer_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) +{ + struct lcs_card *card; + + LCS_DBF_TEXT(5, trace, "txbuffcb"); + /* Put buffer back to pool. */ + lcs_release_buffer(channel, buffer); + card = (struct lcs_card *) + ((char *) channel - offsetof(struct lcs_card, write)); + spin_lock(&card->lock); + card->tx_emitted--; + if (card->tx_emitted <= 0 && card->tx_buffer != NULL) + /* + * Last running tx buffer has finished. Submit partially + * filled current buffer. + */ + __lcs_emit_txbuffer(card); + spin_unlock(&card->lock); +} + +/** + * Packet transmit function called by network stack + */ +static int +__lcs_start_xmit(struct lcs_card *card, struct sk_buff *skb, + struct net_device *dev) +{ + struct lcs_header *header; + + LCS_DBF_TEXT(5, trace, "hardxmit"); + if (skb == NULL) { + card->stats.tx_dropped++; + card->stats.tx_errors++; + return -EIO; + } + if (card->state != DEV_STATE_UP) { + dev_kfree_skb(skb); + card->stats.tx_dropped++; + card->stats.tx_errors++; + card->stats.tx_carrier_errors++; + return 0; + } + if (netif_queue_stopped(dev) ) { + card->stats.tx_dropped++; + return -EBUSY; + } + if (card->tx_buffer != NULL && + card->tx_buffer->count + sizeof(struct lcs_header) + + skb->len + sizeof(u16) > LCS_IOBUFFERSIZE) + /* skb too big for current tx buffer. */ + __lcs_emit_txbuffer(card); + if (card->tx_buffer == NULL) { + /* Get new tx buffer */ + card->tx_buffer = lcs_get_buffer(&card->write); + if (card->tx_buffer == NULL) { + card->stats.tx_dropped++; + return -EBUSY; + } + card->tx_buffer->callback = lcs_txbuffer_cb; + card->tx_buffer->count = 0; + } + header = (struct lcs_header *) + (card->tx_buffer->data + card->tx_buffer->count); + card->tx_buffer->count += skb->len + sizeof(struct lcs_header); + header->offset = card->tx_buffer->count; + header->type = card->lan_type; + header->slot = card->portno; + memcpy(header + 1, skb->data, skb->len); + card->stats.tx_bytes += skb->len; + card->stats.tx_packets++; + dev_kfree_skb(skb); + if (card->tx_emitted <= 0) + /* If this is the first tx buffer emit it immediately. */ + __lcs_emit_txbuffer(card); + return 0; +} + +static int +lcs_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct lcs_card *card; + int rc; + + LCS_DBF_TEXT(5, trace, "pktxmit"); + card = (struct lcs_card *) dev->priv; + spin_lock(&card->lock); + rc = __lcs_start_xmit(card, skb, dev); + spin_unlock(&card->lock); + return rc; +} + +/** + * send startlan and lanstat command to make LCS device ready + */ +static int +lcs_startlan_auto(struct lcs_card *card) +{ + int rc; + + LCS_DBF_TEXT(2, trace, "strtauto"); +#ifdef CONFIG_NET_ETHERNET + card->lan_type = LCS_FRAME_TYPE_ENET; + rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); + if (rc == 0) + return 0; + +#endif +#ifdef CONFIG_TR + card->lan_type = LCS_FRAME_TYPE_TR; + rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); + if (rc == 0) + return 0; +#endif +#ifdef CONFIG_FDDI + card->lan_type = LCS_FRAME_TYPE_FDDI; + rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); + if (rc == 0) + return 0; +#endif + return -EIO; +} + +static int +lcs_startlan(struct lcs_card *card) +{ + int rc, i; + + LCS_DBF_TEXT(2, trace, "startlan"); + rc = 0; + if (card->portno != LCS_INVALID_PORT_NO) { + if (card->lan_type == LCS_FRAME_TYPE_AUTO) + rc = lcs_startlan_auto(card); + else + rc = lcs_send_startlan(card, LCS_INITIATOR_TCPIP); + } else { + for (i = 0; i <= 16; i++) { + card->portno = i; + if (card->lan_type != LCS_FRAME_TYPE_AUTO) + rc = lcs_send_startlan(card, + LCS_INITIATOR_TCPIP); + else + /* autodetecting lan type */ + rc = lcs_startlan_auto(card); + if (rc == 0) + break; + } + } + if (rc == 0) + return lcs_send_lanstat(card); + return rc; +} + +/** + * LCS detect function + * setup channels and make them I/O ready + */ +static int +lcs_detect(struct lcs_card *card) +{ + int rc = 0; + + LCS_DBF_TEXT(2, setup, "lcsdetct"); + /* start/reset card */ + if (card->dev) + netif_stop_queue(card->dev); + rc = lcs_stop_channels(card); + if (rc == 0) { + rc = lcs_start_channels(card); + if (rc == 0) { + rc = lcs_send_startup(card, LCS_INITIATOR_TCPIP); + if (rc == 0) + rc = lcs_startlan(card); + } + } + if (rc == 0) { + card->state = DEV_STATE_UP; + } else { + card->state = DEV_STATE_DOWN; + card->write.state = CH_STATE_INIT; + card->read.state = CH_STATE_INIT; + } + return rc; +} + +/** + * reset card + */ +static int +lcs_resetcard(struct lcs_card *card) +{ + int retries; + + LCS_DBF_TEXT(2, trace, "rescard"); + for (retries = 0; retries < 10; retries++) { + if (lcs_detect(card) == 0) { + netif_wake_queue(card->dev); + card->state = DEV_STATE_UP; + PRINT_INFO("LCS device %s successfully restarted!\n", + card->dev->name); + return 0; + } + msleep(3000); + } + PRINT_ERR("Error in Reseting LCS card!\n"); + return -EIO; +} + + +/** + * LCS Stop card + */ +static int +lcs_stopcard(struct lcs_card *card) +{ + int rc; + + LCS_DBF_TEXT(3, setup, "stopcard"); + + if (card->read.state != CH_STATE_STOPPED && + card->write.state != CH_STATE_STOPPED && + card->state == DEV_STATE_UP) { + lcs_clear_multicast_list(card); + rc = lcs_send_stoplan(card,LCS_INITIATOR_TCPIP); + rc = lcs_send_shutdown(card); + } + rc = lcs_stop_channels(card); + card->state = DEV_STATE_DOWN; + + return rc; +} + +/** + * LGW initiated commands + */ +static int +lcs_lgw_startlan_thread(void *data) +{ + struct lcs_card *card; + + card = (struct lcs_card *) data; + daemonize("lgwstpln"); + + if (!lcs_do_run_thread(card, LCS_STARTLAN_THREAD)) + return 0; + LCS_DBF_TEXT(4, trace, "lgwstpln"); + if (card->dev) + netif_stop_queue(card->dev); + if (lcs_startlan(card) == 0) { + netif_wake_queue(card->dev); + card->state = DEV_STATE_UP; + PRINT_INFO("LCS Startlan for device %s succeeded!\n", + card->dev->name); + + } else + PRINT_ERR("LCS Startlan for device %s failed!\n", + card->dev->name); + lcs_clear_thread_running_bit(card, LCS_STARTLAN_THREAD); + return 0; +} + +/** + * Send startup command initiated by Lan Gateway + */ +static int +lcs_lgw_startup_thread(void *data) +{ + int rc; + + struct lcs_card *card; + + card = (struct lcs_card *) data; + daemonize("lgwstaln"); + + if (!lcs_do_run_thread(card, LCS_STARTUP_THREAD)) + return 0; + LCS_DBF_TEXT(4, trace, "lgwstaln"); + if (card->dev) + netif_stop_queue(card->dev); + rc = lcs_send_startup(card, LCS_INITIATOR_LGW); + if (rc != 0) { + PRINT_ERR("Startup for LCS device %s initiated " \ + "by LGW failed!\nReseting card ...\n", + card->dev->name); + /* do a card reset */ + rc = lcs_resetcard(card); + if (rc == 0) + goto Done; + } + rc = lcs_startlan(card); + if (rc == 0) { + netif_wake_queue(card->dev); + card->state = DEV_STATE_UP; + } +Done: + if (rc == 0) + PRINT_INFO("LCS Startup for device %s succeeded!\n", + card->dev->name); + else + PRINT_ERR("LCS Startup for device %s failed!\n", + card->dev->name); + lcs_clear_thread_running_bit(card, LCS_STARTUP_THREAD); + return 0; +} + + +/** + * send stoplan command initiated by Lan Gateway + */ +static int +lcs_lgw_stoplan_thread(void *data) +{ + struct lcs_card *card; + int rc; + + card = (struct lcs_card *) data; + daemonize("lgwstop"); + + if (!lcs_do_run_thread(card, LCS_STOPLAN_THREAD)) + return 0; + LCS_DBF_TEXT(4, trace, "lgwstop"); + if (card->dev) + netif_stop_queue(card->dev); + if (lcs_send_stoplan(card, LCS_INITIATOR_LGW) == 0) + PRINT_INFO("Stoplan for %s initiated by LGW succeeded!\n", + card->dev->name); + else + PRINT_ERR("Stoplan %s initiated by LGW failed!\n", + card->dev->name); + /*Try to reset the card, stop it on failure */ + rc = lcs_resetcard(card); + if (rc != 0) + rc = lcs_stopcard(card); + lcs_clear_thread_running_bit(card, LCS_STOPLAN_THREAD); + return rc; +} + +/** + * Kernel Thread helper functions for LGW initiated commands + */ +static void +lcs_start_kernel_thread(struct lcs_card *card) +{ + LCS_DBF_TEXT(5, trace, "krnthrd"); + if (lcs_do_start_thread(card, LCS_STARTUP_THREAD)) + kernel_thread(lcs_lgw_startup_thread, (void *) card, SIGCHLD); + if (lcs_do_start_thread(card, LCS_STARTLAN_THREAD)) + kernel_thread(lcs_lgw_startlan_thread, (void *) card, SIGCHLD); + if (lcs_do_start_thread(card, LCS_STOPLAN_THREAD)) + kernel_thread(lcs_lgw_stoplan_thread, (void *) card, SIGCHLD); +#ifdef CONFIG_IP_MULTICAST + if (lcs_do_start_thread(card, LCS_SET_MC_THREAD)) + kernel_thread(lcs_register_mc_addresses, (void *) card, SIGCHLD); +#endif +} + +/** + * Process control frames. + */ +static void +lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd) +{ + LCS_DBF_TEXT(5, trace, "getctrl"); + if (cmd->initiator == LCS_INITIATOR_LGW) { + switch(cmd->cmd_code) { + case LCS_CMD_STARTUP: + if (!lcs_set_thread_start_bit(card, + LCS_STARTUP_THREAD)) + schedule_work(&card->kernel_thread_starter); + break; + case LCS_CMD_STARTLAN: + if (!lcs_set_thread_start_bit(card, + LCS_STARTLAN_THREAD)) + schedule_work(&card->kernel_thread_starter); + break; + case LCS_CMD_STOPLAN: + if (!lcs_set_thread_start_bit(card, + LCS_STOPLAN_THREAD)) + schedule_work(&card->kernel_thread_starter); + break; + default: + PRINT_INFO("UNRECOGNIZED LGW COMMAND\n"); + break; + } + } else + lcs_notify_lancmd_waiters(card, cmd); +} + +/** + * Unpack network packet. + */ +static void +lcs_get_skb(struct lcs_card *card, char *skb_data, unsigned int skb_len) +{ + struct sk_buff *skb; + + LCS_DBF_TEXT(5, trace, "getskb"); + if (card->dev == NULL || + card->state != DEV_STATE_UP) + /* The card isn't up. Ignore the packet. */ + return; + + skb = dev_alloc_skb(skb_len); + if (skb == NULL) { + PRINT_ERR("LCS: alloc_skb failed for device=%s\n", + card->dev->name); + card->stats.rx_dropped++; + return; + } + skb->dev = card->dev; + memcpy(skb_put(skb, skb_len), skb_data, skb_len); + skb->protocol = card->lan_type_trans(skb, card->dev); + card->stats.rx_bytes += skb_len; + card->stats.rx_packets++; + *((__u32 *)skb->cb) = ++card->pkt_seq; + netif_rx(skb); +} + +/** + * LCS main routine to get packets and lancmd replies from the buffers + */ +static void +lcs_get_frames_cb(struct lcs_channel *channel, struct lcs_buffer *buffer) +{ + struct lcs_card *card; + struct lcs_header *lcs_hdr; + __u16 offset; + + LCS_DBF_TEXT(5, trace, "lcsgtpkt"); + lcs_hdr = (struct lcs_header *) buffer->data; + if (lcs_hdr->offset == LCS_ILLEGAL_OFFSET) { + LCS_DBF_TEXT(4, trace, "-eiogpkt"); + return; + } + card = (struct lcs_card *) + ((char *) channel - offsetof(struct lcs_card, read)); + offset = 0; + while (lcs_hdr->offset != 0) { + if (lcs_hdr->offset <= 0 || + lcs_hdr->offset > LCS_IOBUFFERSIZE || + lcs_hdr->offset < offset) { + /* Offset invalid. */ + card->stats.rx_length_errors++; + card->stats.rx_errors++; + return; + } + /* What kind of frame is it? */ + if (lcs_hdr->type == LCS_FRAME_TYPE_CONTROL) + /* Control frame. */ + lcs_get_control(card, (struct lcs_cmd *) lcs_hdr); + else if (lcs_hdr->type == LCS_FRAME_TYPE_ENET || + lcs_hdr->type == LCS_FRAME_TYPE_TR || + lcs_hdr->type == LCS_FRAME_TYPE_FDDI) + /* Normal network packet. */ + lcs_get_skb(card, (char *)(lcs_hdr + 1), + lcs_hdr->offset - offset - + sizeof(struct lcs_header)); + else + /* Unknown frame type. */ + ; // FIXME: error message ? + /* Proceed to next frame. */ + offset = lcs_hdr->offset; + lcs_hdr->offset = LCS_ILLEGAL_OFFSET; + lcs_hdr = (struct lcs_header *) (buffer->data + offset); + } + /* The buffer is now empty. Make it ready again. */ + lcs_ready_buffer(&card->read, buffer); +} + +/** + * get network statistics for ifconfig and other user programs + */ +static struct net_device_stats * +lcs_getstats(struct net_device *dev) +{ + struct lcs_card *card; + + LCS_DBF_TEXT(4, trace, "netstats"); + card = (struct lcs_card *) dev->priv; + return &card->stats; +} + +/** + * stop lcs device + * This function will be called by user doing ifconfig xxx down + */ +static int +lcs_stop_device(struct net_device *dev) +{ + struct lcs_card *card; + int rc; + + LCS_DBF_TEXT(2, trace, "stopdev"); + card = (struct lcs_card *) dev->priv; + netif_stop_queue(dev); + dev->flags &= ~IFF_UP; + rc = lcs_stopcard(card); + if (rc) + PRINT_ERR("Try it again!\n "); + return rc; +} + +/** + * start lcs device and make it runnable + * This function will be called by user doing ifconfig xxx up + */ +static int +lcs_open_device(struct net_device *dev) +{ + struct lcs_card *card; + int rc; + + LCS_DBF_TEXT(2, trace, "opendev"); + card = (struct lcs_card *) dev->priv; + /* initialize statistics */ + rc = lcs_detect(card); + if (rc) { + PRINT_ERR("LCS:Error in opening device!\n"); + + } else { + dev->flags |= IFF_UP; + netif_wake_queue(dev); + card->state = DEV_STATE_UP; + } + return rc; +} + +/** + * show function for portno called by cat or similar things + */ +static ssize_t +lcs_portno_show (struct device *dev, char *buf) +{ + struct lcs_card *card; + + card = (struct lcs_card *)dev->driver_data; + + if (!card) + return 0; + + return sprintf(buf, "%d\n", card->portno); +} + +/** + * store the value which is piped to file portno + */ +static ssize_t +lcs_portno_store (struct device *dev, const char *buf, size_t count) +{ + struct lcs_card *card; + int value; + + card = (struct lcs_card *)dev->driver_data; + + if (!card) + return 0; + + sscanf(buf, "%u", &value); + /* TODO: sanity checks */ + card->portno = value; + + return count; + +} + +static DEVICE_ATTR(portno, 0644, lcs_portno_show, lcs_portno_store); + +static ssize_t +lcs_type_show(struct device *dev, char *buf) +{ + struct ccwgroup_device *cgdev; + + cgdev = to_ccwgroupdev(dev); + if (!cgdev) + return -ENODEV; + + return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); +} + +static DEVICE_ATTR(type, 0444, lcs_type_show, NULL); + +static ssize_t +lcs_timeout_show(struct device *dev, char *buf) +{ + struct lcs_card *card; + + card = (struct lcs_card *)dev->driver_data; + + return card ? sprintf(buf, "%u\n", card->lancmd_timeout) : 0; +} + +static ssize_t +lcs_timeout_store (struct device *dev, const char *buf, size_t count) +{ + struct lcs_card *card; + int value; + + card = (struct lcs_card *)dev->driver_data; + + if (!card) + return 0; + + sscanf(buf, "%u", &value); + /* TODO: sanity checks */ + card->lancmd_timeout = value; + + return count; + +} + +DEVICE_ATTR(lancmd_timeout, 0644, lcs_timeout_show, lcs_timeout_store); + +static struct attribute * lcs_attrs[] = { + &dev_attr_portno.attr, + &dev_attr_type.attr, + &dev_attr_lancmd_timeout.attr, + NULL, +}; + +static struct attribute_group lcs_attr_group = { + .attrs = lcs_attrs, +}; + +/** + * lcs_probe_device is called on establishing a new ccwgroup_device. + */ +static int +lcs_probe_device(struct ccwgroup_device *ccwgdev) +{ + struct lcs_card *card; + int ret; + + if (!get_device(&ccwgdev->dev)) + return -ENODEV; + + LCS_DBF_TEXT(2, setup, "add_dev"); + card = lcs_alloc_card(); + if (!card) { + PRINT_ERR("Allocation of lcs card failed\n"); + put_device(&ccwgdev->dev); + return -ENOMEM; + } + ret = sysfs_create_group(&ccwgdev->dev.kobj, &lcs_attr_group); + if (ret) { + PRINT_ERR("Creating attributes failed"); + lcs_free_card(card); + put_device(&ccwgdev->dev); + return ret; + } + ccwgdev->dev.driver_data = card; + ccwgdev->cdev[0]->handler = lcs_irq; + ccwgdev->cdev[1]->handler = lcs_irq; + return 0; +} + +static int +lcs_register_netdev(struct ccwgroup_device *ccwgdev) +{ + struct lcs_card *card; + + LCS_DBF_TEXT(2, setup, "regnetdv"); + card = (struct lcs_card *)ccwgdev->dev.driver_data; + if (card->dev->reg_state != NETREG_UNINITIALIZED) + return 0; + SET_NETDEV_DEV(card->dev, &ccwgdev->dev); + return register_netdev(card->dev); +} + +/** + * lcs_new_device will be called by setting the group device online. + */ + +static int +lcs_new_device(struct ccwgroup_device *ccwgdev) +{ + struct lcs_card *card; + struct net_device *dev=NULL; + enum lcs_dev_states recover_state; + int rc; + + card = (struct lcs_card *)ccwgdev->dev.driver_data; + if (!card) + return -ENODEV; + + LCS_DBF_TEXT(2, setup, "newdev"); + LCS_DBF_HEX(3, setup, &card, sizeof(void*)); + card->read.ccwdev = ccwgdev->cdev[0]; + card->write.ccwdev = ccwgdev->cdev[1]; + + recover_state = card->state; + ccw_device_set_online(card->read.ccwdev); + ccw_device_set_online(card->write.ccwdev); + + LCS_DBF_TEXT(3, setup, "lcsnewdv"); + + lcs_setup_card(card); + rc = lcs_detect(card); + if (rc) { + LCS_DBF_TEXT(2, setup, "dtctfail"); + PRINT_WARN("Detection of LCS card failed with return code " + "%d (0x%x)\n", rc, rc); + lcs_stopcard(card); + goto out; + } + if (card->dev) { + LCS_DBF_TEXT(2, setup, "samedev"); + LCS_DBF_HEX(3, setup, &card, sizeof(void*)); + goto netdev_out; + } + switch (card->lan_type) { +#ifdef CONFIG_NET_ETHERNET + case LCS_FRAME_TYPE_ENET: + card->lan_type_trans = eth_type_trans; + dev = alloc_etherdev(0); + break; +#endif +#ifdef CONFIG_TR + case LCS_FRAME_TYPE_TR: + card->lan_type_trans = tr_type_trans; + dev = alloc_trdev(0); + break; +#endif +#ifdef CONFIG_FDDI + case LCS_FRAME_TYPE_FDDI: + card->lan_type_trans = fddi_type_trans; + dev = alloc_fddidev(0); + break; +#endif + default: + LCS_DBF_TEXT(3, setup, "errinit"); + PRINT_ERR("LCS: Initialization failed\n"); + PRINT_ERR("LCS: No device found!\n"); + goto out; + } + if (!dev) + goto out; + card->dev = dev; +netdev_out: + card->dev->priv = card; + card->dev->open = lcs_open_device; + card->dev->stop = lcs_stop_device; + card->dev->hard_start_xmit = lcs_start_xmit; + card->dev->get_stats = lcs_getstats; + SET_MODULE_OWNER(dev); + if (lcs_register_netdev(ccwgdev) != 0) + goto out; + memcpy(card->dev->dev_addr, card->mac, LCS_MAC_LENGTH); +#ifdef CONFIG_IP_MULTICAST + if (!lcs_check_multicast_support(card)) + card->dev->set_multicast_list = lcs_set_multicast_list; +#endif + netif_stop_queue(card->dev); + lcs_set_allowed_threads(card,0xffffffff); + if (recover_state == DEV_STATE_RECOVER) { + lcs_set_multicast_list(card->dev); + card->dev->flags |= IFF_UP; + netif_wake_queue(card->dev); + card->state = DEV_STATE_UP; + } else + lcs_stopcard(card); + + return 0; +out: + + ccw_device_set_offline(card->read.ccwdev); + ccw_device_set_offline(card->write.ccwdev); + return -ENODEV; +} + +/** + * lcs_shutdown_device, called when setting the group device offline. + */ +static int +lcs_shutdown_device(struct ccwgroup_device *ccwgdev) +{ + struct lcs_card *card; + enum lcs_dev_states recover_state; + int ret; + + LCS_DBF_TEXT(3, setup, "shtdndev"); + card = (struct lcs_card *)ccwgdev->dev.driver_data; + if (!card) + return -ENODEV; + lcs_set_allowed_threads(card, 0); + if (lcs_wait_for_threads(card, LCS_SET_MC_THREAD)) + return -ERESTARTSYS; + LCS_DBF_HEX(3, setup, &card, sizeof(void*)); + recover_state = card->state; + + ret = lcs_stop_device(card->dev); + ret = ccw_device_set_offline(card->read.ccwdev); + ret = ccw_device_set_offline(card->write.ccwdev); + if (recover_state == DEV_STATE_UP) { + card->state = DEV_STATE_RECOVER; + } + if (ret) + return ret; + return 0; +} + +/** + * lcs_remove_device, free buffers and card + */ +static void +lcs_remove_device(struct ccwgroup_device *ccwgdev) +{ + struct lcs_card *card; + + card = (struct lcs_card *)ccwgdev->dev.driver_data; + if (!card) + return; + + PRINT_INFO("Removing lcs group device ....\n"); + LCS_DBF_TEXT(3, setup, "remdev"); + LCS_DBF_HEX(3, setup, &card, sizeof(void*)); + if (ccwgdev->state == CCWGROUP_ONLINE) { + lcs_shutdown_device(ccwgdev); + } + if (card->dev) + unregister_netdev(card->dev); + sysfs_remove_group(&ccwgdev->dev.kobj, &lcs_attr_group); + lcs_cleanup_card(card); + lcs_free_card(card); + put_device(&ccwgdev->dev); +} + +/** + * LCS ccwgroup driver registration + */ +static struct ccwgroup_driver lcs_group_driver = { + .owner = THIS_MODULE, + .name = "lcs", + .max_slaves = 2, + .driver_id = 0xD3C3E2, + .probe = lcs_probe_device, + .remove = lcs_remove_device, + .set_online = lcs_new_device, + .set_offline = lcs_shutdown_device, +}; + +/** + * LCS Module/Kernel initialization function + */ +static int +__init lcs_init_module(void) +{ + int rc; + + PRINT_INFO("Loading %s\n",version); + rc = lcs_register_debug_facility(); + LCS_DBF_TEXT(0, setup, "lcsinit"); + if (rc) { + PRINT_ERR("Initialization failed\n"); + return rc; + } + + rc = register_cu3088_discipline(&lcs_group_driver); + if (rc) { + PRINT_ERR("Initialization failed\n"); + return rc; + } + + return 0; +} + + +/** + * LCS module cleanup function + */ +static void +__exit lcs_cleanup_module(void) +{ + PRINT_INFO("Terminating lcs module.\n"); + LCS_DBF_TEXT(0, trace, "cleanup"); + unregister_cu3088_discipline(&lcs_group_driver); + lcs_unregister_debug_facility(); +} + +module_init(lcs_init_module); +module_exit(lcs_cleanup_module); + +MODULE_AUTHOR("Frank Pavlic "); +MODULE_LICENSE("GPL"); + -- cgit v1.2.3-59-g8ed1b