![Al Viro](/assets/img/avatar_default.png)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2341 lines
59 KiB
C
2341 lines
59 KiB
C
/*
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* linux/drivers/s390/net/lcs.c
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*
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* Linux for S/390 Lan Channel Station Network Driver
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*
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* Copyright (C) 1999-2001 IBM Deutschland Entwicklung GmbH,
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* IBM Corporation
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* Author(s): Original Code written by
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* DJ Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
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* Rewritten by
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* Frank Pavlic (fpavlic@de.ibm.com) and
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/if.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/trdevice.h>
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#include <linux/fddidevice.h>
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#include <linux/inetdevice.h>
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#include <linux/in.h>
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#include <linux/igmp.h>
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#include <linux/delay.h>
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#include <net/arp.h>
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#include <net/ip.h>
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#include <asm/debug.h>
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#include <asm/idals.h>
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#include <asm/timex.h>
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#include <linux/device.h>
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#include <asm/ccwgroup.h>
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#include "lcs.h"
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#include "cu3088.h"
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#if !defined(CONFIG_NET_ETHERNET) && \
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!defined(CONFIG_TR) && !defined(CONFIG_FDDI)
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#error Cannot compile lcs.c without some net devices switched on.
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#endif
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#define PRINTK_HEADER " lcs: "
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/**
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* initialization string for output
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*/
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static char version[] __initdata = "LCS driver";
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static char debug_buffer[255];
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/**
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* Some prototypes.
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*/
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static void lcs_tasklet(unsigned long);
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static void lcs_start_kernel_thread(struct work_struct *);
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static void lcs_get_frames_cb(struct lcs_channel *, struct lcs_buffer *);
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static int lcs_send_delipm(struct lcs_card *, struct lcs_ipm_list *);
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static int lcs_recovery(void *ptr);
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/**
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* Debug Facility Stuff
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*/
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static debug_info_t *lcs_dbf_setup;
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static debug_info_t *lcs_dbf_trace;
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/**
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* LCS Debug Facility functions
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*/
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static void
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lcs_unregister_debug_facility(void)
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{
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if (lcs_dbf_setup)
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debug_unregister(lcs_dbf_setup);
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if (lcs_dbf_trace)
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debug_unregister(lcs_dbf_trace);
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}
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static int
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lcs_register_debug_facility(void)
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{
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lcs_dbf_setup = debug_register("lcs_setup", 2, 1, 8);
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lcs_dbf_trace = debug_register("lcs_trace", 2, 2, 8);
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if (lcs_dbf_setup == NULL || lcs_dbf_trace == NULL) {
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PRINT_ERR("Not enough memory for debug facility.\n");
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lcs_unregister_debug_facility();
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return -ENOMEM;
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}
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debug_register_view(lcs_dbf_setup, &debug_hex_ascii_view);
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debug_set_level(lcs_dbf_setup, 2);
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debug_register_view(lcs_dbf_trace, &debug_hex_ascii_view);
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debug_set_level(lcs_dbf_trace, 2);
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return 0;
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}
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/**
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* Allocate io buffers.
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*/
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static int
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lcs_alloc_channel(struct lcs_channel *channel)
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{
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int cnt;
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LCS_DBF_TEXT(2, setup, "ichalloc");
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for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
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/* alloc memory fo iobuffer */
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channel->iob[cnt].data =
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kzalloc(LCS_IOBUFFERSIZE, GFP_DMA | GFP_KERNEL);
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if (channel->iob[cnt].data == NULL)
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break;
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channel->iob[cnt].state = LCS_BUF_STATE_EMPTY;
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}
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if (cnt < LCS_NUM_BUFFS) {
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/* Not all io buffers could be allocated. */
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LCS_DBF_TEXT(2, setup, "echalloc");
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while (cnt-- > 0)
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kfree(channel->iob[cnt].data);
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return -ENOMEM;
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}
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return 0;
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}
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/**
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* Free io buffers.
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*/
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static void
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lcs_free_channel(struct lcs_channel *channel)
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{
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int cnt;
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LCS_DBF_TEXT(2, setup, "ichfree");
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for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
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kfree(channel->iob[cnt].data);
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channel->iob[cnt].data = NULL;
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}
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}
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/*
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* Cleanup channel.
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*/
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static void
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lcs_cleanup_channel(struct lcs_channel *channel)
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{
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LCS_DBF_TEXT(3, setup, "cleanch");
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/* Kill write channel tasklets. */
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tasklet_kill(&channel->irq_tasklet);
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/* Free channel buffers. */
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lcs_free_channel(channel);
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}
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/**
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* LCS free memory for card and channels.
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*/
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static void
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lcs_free_card(struct lcs_card *card)
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{
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LCS_DBF_TEXT(2, setup, "remcard");
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LCS_DBF_HEX(2, setup, &card, sizeof(void*));
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kfree(card);
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}
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/**
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* LCS alloc memory for card and channels
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*/
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static struct lcs_card *
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lcs_alloc_card(void)
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{
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struct lcs_card *card;
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int rc;
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LCS_DBF_TEXT(2, setup, "alloclcs");
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card = kzalloc(sizeof(struct lcs_card), GFP_KERNEL | GFP_DMA);
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if (card == NULL)
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return NULL;
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card->lan_type = LCS_FRAME_TYPE_AUTO;
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card->pkt_seq = 0;
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card->lancmd_timeout = LCS_LANCMD_TIMEOUT_DEFAULT;
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/* Allocate io buffers for the read channel. */
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rc = lcs_alloc_channel(&card->read);
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if (rc){
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LCS_DBF_TEXT(2, setup, "iccwerr");
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lcs_free_card(card);
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return NULL;
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}
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/* Allocate io buffers for the write channel. */
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rc = lcs_alloc_channel(&card->write);
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if (rc) {
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LCS_DBF_TEXT(2, setup, "iccwerr");
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lcs_cleanup_channel(&card->read);
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lcs_free_card(card);
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return NULL;
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}
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#ifdef CONFIG_IP_MULTICAST
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INIT_LIST_HEAD(&card->ipm_list);
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#endif
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LCS_DBF_HEX(2, setup, &card, sizeof(void*));
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return card;
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}
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/*
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* Setup read channel.
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*/
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static void
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lcs_setup_read_ccws(struct lcs_card *card)
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{
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int cnt;
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LCS_DBF_TEXT(2, setup, "ireadccw");
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/* Setup read ccws. */
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memset(card->read.ccws, 0, sizeof (struct ccw1) * (LCS_NUM_BUFFS + 1));
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for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
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card->read.ccws[cnt].cmd_code = LCS_CCW_READ;
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card->read.ccws[cnt].count = LCS_IOBUFFERSIZE;
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card->read.ccws[cnt].flags =
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CCW_FLAG_CC | CCW_FLAG_SLI | CCW_FLAG_PCI;
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/*
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* Note: we have allocated the buffer with GFP_DMA, so
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* we do not need to do set_normalized_cda.
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*/
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card->read.ccws[cnt].cda =
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(__u32) __pa(card->read.iob[cnt].data);
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((struct lcs_header *)
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card->read.iob[cnt].data)->offset = LCS_ILLEGAL_OFFSET;
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card->read.iob[cnt].callback = lcs_get_frames_cb;
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card->read.iob[cnt].state = LCS_BUF_STATE_READY;
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card->read.iob[cnt].count = LCS_IOBUFFERSIZE;
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}
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card->read.ccws[0].flags &= ~CCW_FLAG_PCI;
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card->read.ccws[LCS_NUM_BUFFS - 1].flags &= ~CCW_FLAG_PCI;
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card->read.ccws[LCS_NUM_BUFFS - 1].flags |= CCW_FLAG_SUSPEND;
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/* Last ccw is a tic (transfer in channel). */
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card->read.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
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card->read.ccws[LCS_NUM_BUFFS].cda =
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(__u32) __pa(card->read.ccws);
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/* Setg initial state of the read channel. */
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card->read.state = LCS_CH_STATE_INIT;
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card->read.io_idx = 0;
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card->read.buf_idx = 0;
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}
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static void
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lcs_setup_read(struct lcs_card *card)
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{
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LCS_DBF_TEXT(3, setup, "initread");
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lcs_setup_read_ccws(card);
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/* Initialize read channel tasklet. */
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card->read.irq_tasklet.data = (unsigned long) &card->read;
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card->read.irq_tasklet.func = lcs_tasklet;
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/* Initialize waitqueue. */
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init_waitqueue_head(&card->read.wait_q);
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}
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/*
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* Setup write channel.
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*/
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static void
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lcs_setup_write_ccws(struct lcs_card *card)
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{
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int cnt;
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LCS_DBF_TEXT(3, setup, "iwritccw");
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/* Setup write ccws. */
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memset(card->write.ccws, 0, sizeof(struct ccw1) * LCS_NUM_BUFFS + 1);
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for (cnt = 0; cnt < LCS_NUM_BUFFS; cnt++) {
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card->write.ccws[cnt].cmd_code = LCS_CCW_WRITE;
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card->write.ccws[cnt].count = 0;
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card->write.ccws[cnt].flags =
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CCW_FLAG_SUSPEND | CCW_FLAG_CC | CCW_FLAG_SLI;
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/*
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* Note: we have allocated the buffer with GFP_DMA, so
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* we do not need to do set_normalized_cda.
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*/
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card->write.ccws[cnt].cda =
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(__u32) __pa(card->write.iob[cnt].data);
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}
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/* Last ccw is a tic (transfer in channel). */
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card->write.ccws[LCS_NUM_BUFFS].cmd_code = LCS_CCW_TRANSFER;
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card->write.ccws[LCS_NUM_BUFFS].cda =
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(__u32) __pa(card->write.ccws);
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/* Set initial state of the write channel. */
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card->read.state = LCS_CH_STATE_INIT;
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card->write.io_idx = 0;
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card->write.buf_idx = 0;
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}
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static void
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lcs_setup_write(struct lcs_card *card)
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{
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LCS_DBF_TEXT(3, setup, "initwrit");
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lcs_setup_write_ccws(card);
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/* Initialize write channel tasklet. */
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card->write.irq_tasklet.data = (unsigned long) &card->write;
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card->write.irq_tasklet.func = lcs_tasklet;
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/* Initialize waitqueue. */
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init_waitqueue_head(&card->write.wait_q);
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}
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static void
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lcs_set_allowed_threads(struct lcs_card *card, unsigned long threads)
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{
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unsigned long flags;
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spin_lock_irqsave(&card->mask_lock, flags);
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card->thread_allowed_mask = threads;
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spin_unlock_irqrestore(&card->mask_lock, flags);
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wake_up(&card->wait_q);
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}
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static inline int
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lcs_threads_running(struct lcs_card *card, unsigned long threads)
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{
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unsigned long flags;
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int rc = 0;
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spin_lock_irqsave(&card->mask_lock, flags);
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rc = (card->thread_running_mask & threads);
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spin_unlock_irqrestore(&card->mask_lock, flags);
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return rc;
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}
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static int
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lcs_wait_for_threads(struct lcs_card *card, unsigned long threads)
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{
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return wait_event_interruptible(card->wait_q,
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lcs_threads_running(card, threads) == 0);
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}
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static inline int
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lcs_set_thread_start_bit(struct lcs_card *card, unsigned long thread)
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{
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unsigned long flags;
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spin_lock_irqsave(&card->mask_lock, flags);
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if ( !(card->thread_allowed_mask & thread) ||
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(card->thread_start_mask & thread) ) {
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spin_unlock_irqrestore(&card->mask_lock, flags);
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return -EPERM;
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}
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card->thread_start_mask |= thread;
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spin_unlock_irqrestore(&card->mask_lock, flags);
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return 0;
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}
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static void
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lcs_clear_thread_running_bit(struct lcs_card *card, unsigned long thread)
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{
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unsigned long flags;
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spin_lock_irqsave(&card->mask_lock, flags);
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card->thread_running_mask &= ~thread;
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spin_unlock_irqrestore(&card->mask_lock, flags);
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wake_up(&card->wait_q);
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}
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static inline int
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__lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
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{
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unsigned long flags;
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int rc = 0;
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spin_lock_irqsave(&card->mask_lock, flags);
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if (card->thread_start_mask & thread){
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if ((card->thread_allowed_mask & thread) &&
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!(card->thread_running_mask & thread)){
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rc = 1;
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card->thread_start_mask &= ~thread;
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card->thread_running_mask |= thread;
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} else
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rc = -EPERM;
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}
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spin_unlock_irqrestore(&card->mask_lock, flags);
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return rc;
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}
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static int
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lcs_do_run_thread(struct lcs_card *card, unsigned long thread)
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{
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int rc = 0;
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wait_event(card->wait_q,
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(rc = __lcs_do_run_thread(card, thread)) >= 0);
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return rc;
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}
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static int
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lcs_do_start_thread(struct lcs_card *card, unsigned long thread)
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{
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unsigned long flags;
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int rc = 0;
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spin_lock_irqsave(&card->mask_lock, flags);
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LCS_DBF_TEXT_(4, trace, " %02x%02x%02x",
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(u8) card->thread_start_mask,
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(u8) card->thread_allowed_mask,
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(u8) card->thread_running_mask);
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rc = (card->thread_start_mask & thread);
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spin_unlock_irqrestore(&card->mask_lock, flags);
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return rc;
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}
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/**
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* Initialize channels,card and state machines.
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*/
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static void
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lcs_setup_card(struct lcs_card *card)
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{
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LCS_DBF_TEXT(2, setup, "initcard");
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LCS_DBF_HEX(2, setup, &card, sizeof(void*));
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lcs_setup_read(card);
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lcs_setup_write(card);
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/* Set cards initial state. */
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card->state = DEV_STATE_DOWN;
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card->tx_buffer = NULL;
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card->tx_emitted = 0;
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init_waitqueue_head(&card->wait_q);
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spin_lock_init(&card->lock);
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spin_lock_init(&card->ipm_lock);
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spin_lock_init(&card->mask_lock);
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#ifdef CONFIG_IP_MULTICAST
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INIT_LIST_HEAD(&card->ipm_list);
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#endif
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INIT_LIST_HEAD(&card->lancmd_waiters);
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}
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static inline void
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lcs_clear_multicast_list(struct lcs_card *card)
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{
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#ifdef CONFIG_IP_MULTICAST
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struct lcs_ipm_list *ipm;
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unsigned long flags;
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/* Free multicast list. */
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LCS_DBF_TEXT(3, setup, "clmclist");
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spin_lock_irqsave(&card->ipm_lock, flags);
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while (!list_empty(&card->ipm_list)){
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ipm = list_entry(card->ipm_list.next,
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struct lcs_ipm_list, list);
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list_del(&ipm->list);
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if (ipm->ipm_state != LCS_IPM_STATE_SET_REQUIRED){
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spin_unlock_irqrestore(&card->ipm_lock, flags);
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lcs_send_delipm(card, ipm);
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spin_lock_irqsave(&card->ipm_lock, flags);
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}
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kfree(ipm);
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}
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spin_unlock_irqrestore(&card->ipm_lock, flags);
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#endif
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}
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/**
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* Cleanup channels,card and state machines.
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*/
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static void
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lcs_cleanup_card(struct lcs_card *card)
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{
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LCS_DBF_TEXT(3, setup, "cleancrd");
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LCS_DBF_HEX(2,setup,&card,sizeof(void*));
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if (card->dev != NULL)
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free_netdev(card->dev);
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/* Cleanup channels. */
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lcs_cleanup_channel(&card->write);
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lcs_cleanup_channel(&card->read);
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}
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|
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/**
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* Start channel.
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*/
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static int
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lcs_start_channel(struct lcs_channel *channel)
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{
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unsigned long flags;
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int rc;
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LCS_DBF_TEXT_(4,trace,"ssch%s", channel->ccwdev->dev.bus_id);
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spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
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|
rc = ccw_device_start(channel->ccwdev,
|
|
channel->ccws + channel->io_idx, 0, 0,
|
|
DOIO_DENY_PREFETCH | DOIO_ALLOW_SUSPEND);
|
|
if (rc == 0)
|
|
channel->state = LCS_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 == LCS_CH_STATE_CLEARED));
|
|
channel->state = LCS_CH_STATE_STOPPED;
|
|
return rc;
|
|
}
|
|
|
|
|
|
/**
|
|
* Stop channel.
|
|
*/
|
|
static int
|
|
lcs_stop_channel(struct lcs_channel *channel)
|
|
{
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
if (channel->state == LCS_CH_STATE_STOPPED)
|
|
return 0;
|
|
LCS_DBF_TEXT(4,trace,"haltsch");
|
|
LCS_DBF_TEXT_(4,trace,"%s", channel->ccwdev->dev.bus_id);
|
|
channel->state = LCS_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 == LCS_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 == LCS_BUF_STATE_EMPTY) {
|
|
channel->iob[index].state = LCS_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 != LCS_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 = LCS_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");
|
|
BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
|
|
buffer->state != LCS_BUF_STATE_PROCESSED);
|
|
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
|
|
buffer->state = LCS_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");
|
|
BUG_ON(buffer->state != LCS_BUF_STATE_READY);
|
|
buffer->state = LCS_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 == LCS_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");
|
|
BUG_ON(buffer->state != LCS_BUF_STATE_LOCKED &&
|
|
buffer->state != LCS_BUF_STATE_PROCESSED);
|
|
spin_lock_irqsave(get_ccwdev_lock(channel->ccwdev), flags);
|
|
buffer->state = LCS_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 = kzalloc(sizeof(struct lcs_reply), GFP_ATOMIC);
|
|
if (!reply)
|
|
return NULL;
|
|
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;
|
|
}
|
|
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_safe(ipm, tmp, &failed_list, list)
|
|
list_move_tail(&ipm->list, &card->ipm_list);
|
|
|
|
spin_unlock_irqrestore(&card->ipm_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* get mac address for the relevant Multicast address
|
|
*/
|
|
static void
|
|
lcs_get_mac_for_ipm(__be32 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 *)
|
|
kzalloc(sizeof(struct lcs_ipm_list), GFP_ATOMIC);
|
|
if (ipm == NULL) {
|
|
PRINT_INFO("Not enough memory to add "
|
|
"new multicast entry!\n");
|
|
break;
|
|
}
|
|
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);
|
|
LCS_DBF_HEX(2,trace,&ipm->ipm.ip_addr,4);
|
|
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);
|
|
|
|
netif_carrier_off(card->dev);
|
|
netif_tx_disable(card->dev);
|
|
wait_event(card->write.wait_q,
|
|
(card->write.state != LCS_CH_STATE_RUNNING));
|
|
lcs_fix_multicast_list(card);
|
|
if (card->state == DEV_STATE_UP) {
|
|
netif_carrier_on(card->dev);
|
|
netif_wake_queue(card->dev);
|
|
}
|
|
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);
|
|
}
|
|
|
|
static int
|
|
lcs_get_problem(struct ccw_device *cdev, struct irb *irb)
|
|
{
|
|
int dstat, cstat;
|
|
char *sense;
|
|
|
|
sense = (char *) irb->ecw;
|
|
cstat = irb->scsw.cstat;
|
|
dstat = irb->scsw.dstat;
|
|
|
|
if (cstat & (SCHN_STAT_CHN_CTRL_CHK | SCHN_STAT_INTF_CTRL_CHK |
|
|
SCHN_STAT_CHN_DATA_CHK | SCHN_STAT_CHAIN_CHECK |
|
|
SCHN_STAT_PROT_CHECK | SCHN_STAT_PROG_CHECK)) {
|
|
LCS_DBF_TEXT(2, trace, "CGENCHK");
|
|
return 1;
|
|
}
|
|
if (dstat & DEV_STAT_UNIT_CHECK) {
|
|
if (sense[LCS_SENSE_BYTE_1] &
|
|
LCS_SENSE_RESETTING_EVENT) {
|
|
LCS_DBF_TEXT(2, trace, "REVIND");
|
|
return 1;
|
|
}
|
|
if (sense[LCS_SENSE_BYTE_0] &
|
|
LCS_SENSE_CMD_REJECT) {
|
|
LCS_DBF_TEXT(2, trace, "CMDREJ");
|
|
return 0;
|
|
}
|
|
if ((!sense[LCS_SENSE_BYTE_0]) &&
|
|
(!sense[LCS_SENSE_BYTE_1]) &&
|
|
(!sense[LCS_SENSE_BYTE_2]) &&
|
|
(!sense[LCS_SENSE_BYTE_3])) {
|
|
LCS_DBF_TEXT(2, trace, "ZEROSEN");
|
|
return 0;
|
|
}
|
|
LCS_DBF_TEXT(2, trace, "DGENCHK");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
lcs_schedule_recovery(struct lcs_card *card)
|
|
{
|
|
LCS_DBF_TEXT(2, trace, "startrec");
|
|
if (!lcs_set_thread_start_bit(card, LCS_RECOVERY_THREAD))
|
|
schedule_work(&card->kernel_thread_starter);
|
|
}
|
|
|
|
/**
|
|
* 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 rc, index;
|
|
int cstat, dstat;
|
|
|
|
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;
|
|
|
|
cstat = irb->scsw.cstat;
|
|
dstat = irb->scsw.dstat;
|
|
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);
|
|
|
|
/* Check for channel and device errors presented */
|
|
rc = lcs_get_problem(cdev, irb);
|
|
if (rc || (dstat & DEV_STAT_UNIT_EXCEP)) {
|
|
PRINT_WARN("check on device %s, dstat=0x%X, cstat=0x%X \n",
|
|
cdev->dev.bus_id, dstat, cstat);
|
|
if (rc) {
|
|
lcs_schedule_recovery(card);
|
|
wake_up(&card->wait_q);
|
|
return;
|
|
}
|
|
}
|
|
/* How far in the ccw chain have we processed? */
|
|
if ((channel->state != LCS_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 = LCS_CH_STATE_STOPPED;
|
|
else if (irb->scsw.actl & SCSW_ACTL_SUSPENDED)
|
|
/* CCW execution stopped on a suspend bit. */
|
|
channel->state = LCS_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 = LCS_CH_STATE_HALTED;
|
|
}
|
|
if (irb->scsw.fctl & SCSW_FCTL_CLEAR_FUNC) {
|
|
channel->state = LCS_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 == LCS_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 == LCS_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 == LCS_CH_STATE_SUSPENDED &&
|
|
channel->iob[channel->io_idx].state == LCS_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));
|
|
if (netif_queue_stopped(card->dev) && netif_carrier_ok(card->dev))
|
|
netif_wake_queue(card->dev);
|
|
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;
|
|
int rc = 0;
|
|
|
|
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 (skb->protocol == htons(ETH_P_IPV6)) {
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
netif_stop_queue(card->dev);
|
|
spin_lock(&card->lock);
|
|
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++;
|
|
rc = -EBUSY;
|
|
goto out;
|
|
}
|
|
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);
|
|
spin_unlock(&card->lock);
|
|
card->stats.tx_bytes += skb->len;
|
|
card->stats.tx_packets++;
|
|
dev_kfree_skb(skb);
|
|
netif_wake_queue(card->dev);
|
|
spin_lock(&card->lock);
|
|
if (card->tx_emitted <= 0 && card->tx_buffer != NULL)
|
|
/* If this is the first tx buffer emit it immediately. */
|
|
__lcs_emit_txbuffer(card);
|
|
out:
|
|
spin_unlock(&card->lock);
|
|
return rc;
|
|
}
|
|
|
|
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;
|
|
rc = __lcs_start_xmit(card, skb, dev);
|
|
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 = LCS_CH_STATE_INIT;
|
|
card->read.state = LCS_CH_STATE_INIT;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* LCS Stop card
|
|
*/
|
|
static int
|
|
lcs_stopcard(struct lcs_card *card)
|
|
{
|
|
int rc;
|
|
|
|
LCS_DBF_TEXT(3, setup, "stopcard");
|
|
|
|
if (card->read.state != LCS_CH_STATE_STOPPED &&
|
|
card->write.state != LCS_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;
|
|
}
|
|
|
|
/**
|
|
* Kernel Thread helper functions for LGW initiated commands
|
|
*/
|
|
static void
|
|
lcs_start_kernel_thread(struct work_struct *work)
|
|
{
|
|
struct lcs_card *card = container_of(work, struct lcs_card, kernel_thread_starter);
|
|
LCS_DBF_TEXT(5, trace, "krnthrd");
|
|
if (lcs_do_start_thread(card, LCS_RECOVERY_THREAD))
|
|
kernel_thread(lcs_recovery, (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:
|
|
case LCS_CMD_STARTLAN:
|
|
lcs_schedule_recovery(card);
|
|
break;
|
|
case LCS_CMD_STOPLAN:
|
|
PRINT_WARN("Stoplan for %s initiated by LGW.\n",
|
|
card->dev->name);
|
|
if (card->dev)
|
|
netif_carrier_off(card->dev);
|
|
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_carrier_off(dev);
|
|
netif_tx_disable(dev);
|
|
dev->flags &= ~IFF_UP;
|
|
wait_event(card->write.wait_q,
|
|
(card->write.state != LCS_CH_STATE_RUNNING));
|
|
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_carrier_on(dev);
|
|
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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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 ssize_t
|
|
lcs_dev_recover_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct lcs_card *card = dev->driver_data;
|
|
char *tmp;
|
|
int i;
|
|
|
|
if (!card)
|
|
return -EINVAL;
|
|
if (card->state != DEV_STATE_UP)
|
|
return -EPERM;
|
|
i = simple_strtoul(buf, &tmp, 16);
|
|
if (i == 1)
|
|
lcs_schedule_recovery(card);
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(recover, 0200, NULL, lcs_dev_recover_store);
|
|
|
|
static struct attribute * lcs_attrs[] = {
|
|
&dev_attr_portno.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_lancmd_timeout.attr,
|
|
&dev_attr_recover.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;
|
|
card->gdev = ccwgdev;
|
|
INIT_WORK(&card->kernel_thread_starter, lcs_start_kernel_thread);
|
|
card->thread_start_mask = 0;
|
|
card->thread_allowed_mask = 0;
|
|
card->thread_running_mask = 0;
|
|
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;
|
|
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);
|
|
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
|
|
netdev_out:
|
|
lcs_set_allowed_threads(card,0xffffffff);
|
|
if (recover_state == DEV_STATE_RECOVER) {
|
|
lcs_set_multicast_list(card->dev);
|
|
card->dev->flags |= IFF_UP;
|
|
netif_carrier_on(card->dev);
|
|
netif_wake_queue(card->dev);
|
|
card->state = DEV_STATE_UP;
|
|
} else {
|
|
lcs_stopcard(card);
|
|
}
|
|
|
|
if (lcs_register_netdev(ccwgdev) != 0)
|
|
goto out;
|
|
|
|
/* 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");
|
|
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, int recovery_mode)
|
|
{
|
|
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;
|
|
if (recovery_mode == 0) {
|
|
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;
|
|
}
|
|
|
|
static int
|
|
lcs_shutdown_device(struct ccwgroup_device *ccwgdev)
|
|
{
|
|
return __lcs_shutdown_device(ccwgdev, 0);
|
|
}
|
|
|
|
/**
|
|
* drive lcs recovery after startup and startlan initiated by Lan Gateway
|
|
*/
|
|
static int
|
|
lcs_recovery(void *ptr)
|
|
{
|
|
struct lcs_card *card;
|
|
struct ccwgroup_device *gdev;
|
|
int rc;
|
|
|
|
card = (struct lcs_card *) ptr;
|
|
daemonize("lcs_recover");
|
|
|
|
LCS_DBF_TEXT(4, trace, "recover1");
|
|
if (!lcs_do_run_thread(card, LCS_RECOVERY_THREAD))
|
|
return 0;
|
|
LCS_DBF_TEXT(4, trace, "recover2");
|
|
gdev = card->gdev;
|
|
PRINT_WARN("Recovery of device %s started...\n", gdev->dev.bus_id);
|
|
rc = __lcs_shutdown_device(gdev, 1);
|
|
rc = lcs_new_device(gdev);
|
|
if (!rc)
|
|
PRINT_INFO("Device %s successfully recovered!\n",
|
|
card->dev->name);
|
|
else
|
|
PRINT_INFO("Device %s could not be recovered!\n",
|
|
card->dev->name);
|
|
lcs_clear_thread_running_bit(card, LCS_RECOVERY_THREAD);
|
|
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 <fpavlic@de.ibm.com>");
|
|
MODULE_LICENSE("GPL");
|
|
|