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-rw-r--r--drivers/s390/net/ctcmain.c616
1 files changed, 206 insertions, 410 deletions
diff --git a/drivers/s390/net/ctcmain.c b/drivers/s390/net/ctcmain.c
index 7266bf5ea659..ff3e95e07e89 100644
--- a/drivers/s390/net/ctcmain.c
+++ b/drivers/s390/net/ctcmain.c
@@ -1,5 +1,5 @@
1/* 1/*
2 * $Id: ctcmain.c,v 1.72 2005/03/17 10:51:52 ptiedem Exp $ 2 * $Id: ctcmain.c,v 1.74 2005/03/24 09:04:17 mschwide Exp $
3 * 3 *
4 * CTC / ESCON network driver 4 * CTC / ESCON network driver
5 * 5 *
@@ -37,12 +37,11 @@
37 * along with this program; if not, write to the Free Software 37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 38 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
39 * 39 *
40 * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.72 $ 40 * RELEASE-TAG: CTC/ESCON network driver $Revision: 1.74 $
41 * 41 *
42 */ 42 */
43 43
44#undef DEBUG 44#undef DEBUG
45
46#include <linux/module.h> 45#include <linux/module.h>
47#include <linux/init.h> 46#include <linux/init.h>
48#include <linux/kernel.h> 47#include <linux/kernel.h>
@@ -74,288 +73,13 @@
74#include "ctctty.h" 73#include "ctctty.h"
75#include "fsm.h" 74#include "fsm.h"
76#include "cu3088.h" 75#include "cu3088.h"
76
77#include "ctcdbug.h" 77#include "ctcdbug.h"
78#include "ctcmain.h"
78 79
79MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@millenux.com)"); 80MODULE_AUTHOR("(C) 2000 IBM Corp. by Fritz Elfert (felfert@millenux.com)");
80MODULE_DESCRIPTION("Linux for S/390 CTC/Escon Driver"); 81MODULE_DESCRIPTION("Linux for S/390 CTC/Escon Driver");
81MODULE_LICENSE("GPL"); 82MODULE_LICENSE("GPL");
82
83/**
84 * CCW commands, used in this driver.
85 */
86#define CCW_CMD_WRITE 0x01
87#define CCW_CMD_READ 0x02
88#define CCW_CMD_SET_EXTENDED 0xc3
89#define CCW_CMD_PREPARE 0xe3
90
91#define CTC_PROTO_S390 0
92#define CTC_PROTO_LINUX 1
93#define CTC_PROTO_LINUX_TTY 2
94#define CTC_PROTO_OS390 3
95#define CTC_PROTO_MAX 3
96
97#define CTC_BUFSIZE_LIMIT 65535
98#define CTC_BUFSIZE_DEFAULT 32768
99
100#define CTC_TIMEOUT_5SEC 5000
101
102#define CTC_INITIAL_BLOCKLEN 2
103
104#define READ 0
105#define WRITE 1
106
107#define CTC_ID_SIZE BUS_ID_SIZE+3
108
109
110struct ctc_profile {
111 unsigned long maxmulti;
112 unsigned long maxcqueue;
113 unsigned long doios_single;
114 unsigned long doios_multi;
115 unsigned long txlen;
116 unsigned long tx_time;
117 struct timespec send_stamp;
118};
119
120/**
121 * Definition of one channel
122 */
123struct channel {
124
125 /**
126 * Pointer to next channel in list.
127 */
128 struct channel *next;
129 char id[CTC_ID_SIZE];
130 struct ccw_device *cdev;
131
132 /**
133 * Type of this channel.
134 * CTC/A or Escon for valid channels.
135 */
136 enum channel_types type;
137
138 /**
139 * Misc. flags. See CHANNEL_FLAGS_... below
140 */
141 __u32 flags;
142
143 /**
144 * The protocol of this channel
145 */
146 __u16 protocol;
147
148 /**
149 * I/O and irq related stuff
150 */
151 struct ccw1 *ccw;
152 struct irb *irb;
153
154 /**
155 * RX/TX buffer size
156 */
157 int max_bufsize;
158
159 /**
160 * Transmit/Receive buffer.
161 */
162 struct sk_buff *trans_skb;
163
164 /**
165 * Universal I/O queue.
166 */
167 struct sk_buff_head io_queue;
168
169 /**
170 * TX queue for collecting skb's during busy.
171 */
172 struct sk_buff_head collect_queue;
173
174 /**
175 * Amount of data in collect_queue.
176 */
177 int collect_len;
178
179 /**
180 * spinlock for collect_queue and collect_len
181 */
182 spinlock_t collect_lock;
183
184 /**
185 * Timer for detecting unresposive
186 * I/O operations.
187 */
188 fsm_timer timer;
189
190 /**
191 * Retry counter for misc. operations.
192 */
193 int retry;
194
195 /**
196 * The finite state machine of this channel
197 */
198 fsm_instance *fsm;
199
200 /**
201 * The corresponding net_device this channel
202 * belongs to.
203 */
204 struct net_device *netdev;
205
206 struct ctc_profile prof;
207
208 unsigned char *trans_skb_data;
209
210 __u16 logflags;
211};
212
213#define CHANNEL_FLAGS_READ 0
214#define CHANNEL_FLAGS_WRITE 1
215#define CHANNEL_FLAGS_INUSE 2
216#define CHANNEL_FLAGS_BUFSIZE_CHANGED 4
217#define CHANNEL_FLAGS_FAILED 8
218#define CHANNEL_FLAGS_WAITIRQ 16
219#define CHANNEL_FLAGS_RWMASK 1
220#define CHANNEL_DIRECTION(f) (f & CHANNEL_FLAGS_RWMASK)
221
222#define LOG_FLAG_ILLEGALPKT 1
223#define LOG_FLAG_ILLEGALSIZE 2
224#define LOG_FLAG_OVERRUN 4
225#define LOG_FLAG_NOMEM 8
226
227#define CTC_LOGLEVEL_INFO 1
228#define CTC_LOGLEVEL_NOTICE 2
229#define CTC_LOGLEVEL_WARN 4
230#define CTC_LOGLEVEL_EMERG 8
231#define CTC_LOGLEVEL_ERR 16
232#define CTC_LOGLEVEL_DEBUG 32
233#define CTC_LOGLEVEL_CRIT 64
234
235#define CTC_LOGLEVEL_DEFAULT \
236(CTC_LOGLEVEL_INFO | CTC_LOGLEVEL_NOTICE | CTC_LOGLEVEL_WARN | CTC_LOGLEVEL_CRIT)
237
238#define CTC_LOGLEVEL_MAX ((CTC_LOGLEVEL_CRIT<<1)-1)
239
240static int loglevel = CTC_LOGLEVEL_DEFAULT;
241
242#define ctc_pr_debug(fmt, arg...) \
243do { if (loglevel & CTC_LOGLEVEL_DEBUG) printk(KERN_DEBUG fmt,##arg); } while (0)
244
245#define ctc_pr_info(fmt, arg...) \
246do { if (loglevel & CTC_LOGLEVEL_INFO) printk(KERN_INFO fmt,##arg); } while (0)
247
248#define ctc_pr_notice(fmt, arg...) \
249do { if (loglevel & CTC_LOGLEVEL_NOTICE) printk(KERN_NOTICE fmt,##arg); } while (0)
250
251#define ctc_pr_warn(fmt, arg...) \
252do { if (loglevel & CTC_LOGLEVEL_WARN) printk(KERN_WARNING fmt,##arg); } while (0)
253
254#define ctc_pr_emerg(fmt, arg...) \
255do { if (loglevel & CTC_LOGLEVEL_EMERG) printk(KERN_EMERG fmt,##arg); } while (0)
256
257#define ctc_pr_err(fmt, arg...) \
258do { if (loglevel & CTC_LOGLEVEL_ERR) printk(KERN_ERR fmt,##arg); } while (0)
259
260#define ctc_pr_crit(fmt, arg...) \
261do { if (loglevel & CTC_LOGLEVEL_CRIT) printk(KERN_CRIT fmt,##arg); } while (0)
262
263/**
264 * Linked list of all detected channels.
265 */
266static struct channel *channels = NULL;
267
268struct ctc_priv {
269 struct net_device_stats stats;
270 unsigned long tbusy;
271 /**
272 * The finite state machine of this interface.
273 */
274 fsm_instance *fsm;
275 /**
276 * The protocol of this device
277 */
278 __u16 protocol;
279 /**
280 * Timer for restarting after I/O Errors
281 */
282 fsm_timer restart_timer;
283
284 int buffer_size;
285
286 struct channel *channel[2];
287};
288
289/**
290 * Definition of our link level header.
291 */
292struct ll_header {
293 __u16 length;
294 __u16 type;
295 __u16 unused;
296};
297#define LL_HEADER_LENGTH (sizeof(struct ll_header))
298
299/**
300 * Compatibility macros for busy handling
301 * of network devices.
302 */
303static __inline__ void
304ctc_clear_busy(struct net_device * dev)
305{
306 clear_bit(0, &(((struct ctc_priv *) dev->priv)->tbusy));
307 if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
308 netif_wake_queue(dev);
309}
310
311static __inline__ int
312ctc_test_and_set_busy(struct net_device * dev)
313{
314 if (((struct ctc_priv *)dev->priv)->protocol != CTC_PROTO_LINUX_TTY)
315 netif_stop_queue(dev);
316 return test_and_set_bit(0, &((struct ctc_priv *) dev->priv)->tbusy);
317}
318
319/**
320 * Print Banner.
321 */
322static void
323print_banner(void)
324{
325 static int printed = 0;
326 char vbuf[] = "$Revision: 1.72 $";
327 char *version = vbuf;
328
329 if (printed)
330 return;
331 if ((version = strchr(version, ':'))) {
332 char *p = strchr(version + 1, '$');
333 if (p)
334 *p = '\0';
335 } else
336 version = " ??? ";
337 printk(KERN_INFO "CTC driver Version%s"
338#ifdef DEBUG
339 " (DEBUG-VERSION, " __DATE__ __TIME__ ")"
340#endif
341 " initialized\n", version);
342 printed = 1;
343}
344
345/**
346 * Return type of a detected device.
347 */
348static enum channel_types
349get_channel_type(struct ccw_device_id *id)
350{
351 enum channel_types type = (enum channel_types) id->driver_info;
352
353 if (type == channel_type_ficon)
354 type = channel_type_escon;
355
356 return type;
357}
358
359/** 83/**
360 * States of the interface statemachine. 84 * States of the interface statemachine.
361 */ 85 */
@@ -371,7 +95,7 @@ enum dev_states {
371 /** 95 /**
372 * MUST be always the last element!! 96 * MUST be always the last element!!
373 */ 97 */
374 NR_DEV_STATES 98 CTC_NR_DEV_STATES
375}; 99};
376 100
377static const char *dev_state_names[] = { 101static const char *dev_state_names[] = {
@@ -399,7 +123,7 @@ enum dev_events {
399 /** 123 /**
400 * MUST be always the last element!! 124 * MUST be always the last element!!
401 */ 125 */
402 NR_DEV_EVENTS 126 CTC_NR_DEV_EVENTS
403}; 127};
404 128
405static const char *dev_event_names[] = { 129static const char *dev_event_names[] = {
@@ -476,40 +200,6 @@ enum ch_events {
476 NR_CH_EVENTS, 200 NR_CH_EVENTS,
477}; 201};
478 202
479static const char *ch_event_names[] = {
480 "ccw_device success",
481 "ccw_device busy",
482 "ccw_device enodev",
483 "ccw_device ioerr",
484 "ccw_device unknown",
485
486 "Status ATTN & BUSY",
487 "Status ATTN",
488 "Status BUSY",
489
490 "Unit check remote reset",
491 "Unit check remote system reset",
492 "Unit check TX timeout",
493 "Unit check TX parity",
494 "Unit check Hardware failure",
495 "Unit check RX parity",
496 "Unit check ZERO",
497 "Unit check Unknown",
498
499 "SubChannel check Unknown",
500
501 "Machine check failure",
502 "Machine check operational",
503
504 "IRQ normal",
505 "IRQ final",
506
507 "Timer",
508
509 "Start",
510 "Stop",
511};
512
513/** 203/**
514 * States of the channel statemachine. 204 * States of the channel statemachine.
515 */ 205 */
@@ -545,6 +235,87 @@ enum ch_states {
545 NR_CH_STATES, 235 NR_CH_STATES,
546}; 236};
547 237
238static int loglevel = CTC_LOGLEVEL_DEFAULT;
239
240/**
241 * Linked list of all detected channels.
242 */
243static struct channel *channels = NULL;
244
245/**
246 * Print Banner.
247 */
248static void
249print_banner(void)
250{
251 static int printed = 0;
252 char vbuf[] = "$Revision: 1.74 $";
253 char *version = vbuf;
254
255 if (printed)
256 return;
257 if ((version = strchr(version, ':'))) {
258 char *p = strchr(version + 1, '$');
259 if (p)
260 *p = '\0';
261 } else
262 version = " ??? ";
263 printk(KERN_INFO "CTC driver Version%s"
264#ifdef DEBUG
265 " (DEBUG-VERSION, " __DATE__ __TIME__ ")"
266#endif
267 " initialized\n", version);
268 printed = 1;
269}
270
271/**
272 * Return type of a detected device.
273 */
274static enum channel_types
275get_channel_type(struct ccw_device_id *id)
276{
277 enum channel_types type = (enum channel_types) id->driver_info;
278
279 if (type == channel_type_ficon)
280 type = channel_type_escon;
281
282 return type;
283}
284
285static const char *ch_event_names[] = {
286 "ccw_device success",
287 "ccw_device busy",
288 "ccw_device enodev",
289 "ccw_device ioerr",
290 "ccw_device unknown",
291
292 "Status ATTN & BUSY",
293 "Status ATTN",
294 "Status BUSY",
295
296 "Unit check remote reset",
297 "Unit check remote system reset",
298 "Unit check TX timeout",
299 "Unit check TX parity",
300 "Unit check Hardware failure",
301 "Unit check RX parity",
302 "Unit check ZERO",
303 "Unit check Unknown",
304
305 "SubChannel check Unknown",
306
307 "Machine check failure",
308 "Machine check operational",
309
310 "IRQ normal",
311 "IRQ final",
312
313 "Timer",
314
315 "Start",
316 "Stop",
317};
318
548static const char *ch_state_names[] = { 319static const char *ch_state_names[] = {
549 "Idle", 320 "Idle",
550 "Stopped", 321 "Stopped",
@@ -1934,7 +1705,6 @@ add_channel(struct ccw_device *cdev, enum channel_types type)
1934 ch->cdev = cdev; 1705 ch->cdev = cdev;
1935 snprintf(ch->id, CTC_ID_SIZE, "ch-%s", cdev->dev.bus_id); 1706 snprintf(ch->id, CTC_ID_SIZE, "ch-%s", cdev->dev.bus_id);
1936 ch->type = type; 1707 ch->type = type;
1937 loglevel = CTC_LOGLEVEL_DEFAULT;
1938 ch->fsm = init_fsm(ch->id, ch_state_names, 1708 ch->fsm = init_fsm(ch->id, ch_state_names,
1939 ch_event_names, NR_CH_STATES, NR_CH_EVENTS, 1709 ch_event_names, NR_CH_STATES, NR_CH_EVENTS,
1940 ch_fsm, CH_FSM_LEN, GFP_KERNEL); 1710 ch_fsm, CH_FSM_LEN, GFP_KERNEL);
@@ -2697,6 +2467,7 @@ ctc_stats(struct net_device * dev)
2697/* 2467/*
2698 * sysfs attributes 2468 * sysfs attributes
2699 */ 2469 */
2470
2700static ssize_t 2471static ssize_t
2701buffer_show(struct device *dev, char *buf) 2472buffer_show(struct device *dev, char *buf)
2702{ 2473{
@@ -2715,57 +2486,61 @@ buffer_write(struct device *dev, const char *buf, size_t count)
2715 struct ctc_priv *priv; 2486 struct ctc_priv *priv;
2716 struct net_device *ndev; 2487 struct net_device *ndev;
2717 int bs1; 2488 int bs1;
2489 char buffer[16];
2718 2490
2719 DBF_TEXT(trace, 3, __FUNCTION__); 2491 DBF_TEXT(trace, 3, __FUNCTION__);
2492 DBF_TEXT(trace, 3, buf);
2720 priv = dev->driver_data; 2493 priv = dev->driver_data;
2721 if (!priv) 2494 if (!priv) {
2495 DBF_TEXT(trace, 3, "bfnopriv");
2722 return -ENODEV; 2496 return -ENODEV;
2497 }
2498
2499 sscanf(buf, "%u", &bs1);
2500 if (bs1 > CTC_BUFSIZE_LIMIT)
2501 goto einval;
2502 if (bs1 < (576 + LL_HEADER_LENGTH + 2))
2503 goto einval;
2504 priv->buffer_size = bs1; // just to overwrite the default
2505
2723 ndev = priv->channel[READ]->netdev; 2506 ndev = priv->channel[READ]->netdev;
2724 if (!ndev) 2507 if (!ndev) {
2508 DBF_TEXT(trace, 3, "bfnondev");
2725 return -ENODEV; 2509 return -ENODEV;
2726 sscanf(buf, "%u", &bs1); 2510 }
2727 2511
2728 if (bs1 > CTC_BUFSIZE_LIMIT)
2729 return -EINVAL;
2730 if ((ndev->flags & IFF_RUNNING) && 2512 if ((ndev->flags & IFF_RUNNING) &&
2731 (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2))) 2513 (bs1 < (ndev->mtu + LL_HEADER_LENGTH + 2)))
2732 return -EINVAL; 2514 goto einval;
2733 if (bs1 < (576 + LL_HEADER_LENGTH + 2))
2734 return -EINVAL;
2735 2515
2736 priv->buffer_size = bs1; 2516 priv->channel[READ]->max_bufsize = bs1;
2737 priv->channel[READ]->max_bufsize = 2517 priv->channel[WRITE]->max_bufsize = bs1;
2738 priv->channel[WRITE]->max_bufsize = bs1;
2739 if (!(ndev->flags & IFF_RUNNING)) 2518 if (!(ndev->flags & IFF_RUNNING))
2740 ndev->mtu = bs1 - LL_HEADER_LENGTH - 2; 2519 ndev->mtu = bs1 - LL_HEADER_LENGTH - 2;
2741 priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; 2520 priv->channel[READ]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
2742 priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED; 2521 priv->channel[WRITE]->flags |= CHANNEL_FLAGS_BUFSIZE_CHANGED;
2743 2522
2523 sprintf(buffer, "%d",priv->buffer_size);
2524 DBF_TEXT(trace, 3, buffer);
2744 return count; 2525 return count;
2745 2526
2527einval:
2528 DBF_TEXT(trace, 3, "buff_err");
2529 return -EINVAL;
2746} 2530}
2747 2531
2748static ssize_t 2532static ssize_t
2749loglevel_show(struct device *dev, char *buf) 2533loglevel_show(struct device *dev, char *buf)
2750{ 2534{
2751 struct ctc_priv *priv;
2752
2753 priv = dev->driver_data;
2754 if (!priv)
2755 return -ENODEV;
2756 return sprintf(buf, "%d\n", loglevel); 2535 return sprintf(buf, "%d\n", loglevel);
2757} 2536}
2758 2537
2759static ssize_t 2538static ssize_t
2760loglevel_write(struct device *dev, const char *buf, size_t count) 2539loglevel_write(struct device *dev, const char *buf, size_t count)
2761{ 2540{
2762 struct ctc_priv *priv;
2763 int ll1; 2541 int ll1;
2764 2542
2765 DBF_TEXT(trace, 5, __FUNCTION__); 2543 DBF_TEXT(trace, 5, __FUNCTION__);
2766 priv = dev->driver_data;
2767 if (!priv)
2768 return -ENODEV;
2769 sscanf(buf, "%i", &ll1); 2544 sscanf(buf, "%i", &ll1);
2770 2545
2771 if ((ll1 > CTC_LOGLEVEL_MAX) || (ll1 < 0)) 2546 if ((ll1 > CTC_LOGLEVEL_MAX) || (ll1 < 0))
@@ -2835,27 +2610,6 @@ stats_write(struct device *dev, const char *buf, size_t count)
2835 return count; 2610 return count;
2836} 2611}
2837 2612
2838static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
2839static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write);
2840static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
2841
2842static int
2843ctc_add_attributes(struct device *dev)
2844{
2845// device_create_file(dev, &dev_attr_buffer);
2846 device_create_file(dev, &dev_attr_loglevel);
2847 device_create_file(dev, &dev_attr_stats);
2848 return 0;
2849}
2850
2851static void
2852ctc_remove_attributes(struct device *dev)
2853{
2854 device_remove_file(dev, &dev_attr_stats);
2855 device_remove_file(dev, &dev_attr_loglevel);
2856// device_remove_file(dev, &dev_attr_buffer);
2857}
2858
2859 2613
2860static void 2614static void
2861ctc_netdev_unregister(struct net_device * dev) 2615ctc_netdev_unregister(struct net_device * dev)
@@ -2899,52 +2653,6 @@ ctc_free_netdevice(struct net_device * dev, int free_dev)
2899#endif 2653#endif
2900} 2654}
2901 2655
2902/**
2903 * Initialize everything of the net device except the name and the
2904 * channel structs.
2905 */
2906static struct net_device *
2907ctc_init_netdevice(struct net_device * dev, int alloc_device,
2908 struct ctc_priv *privptr)
2909{
2910 if (!privptr)
2911 return NULL;
2912
2913 DBF_TEXT(setup, 3, __FUNCTION__);
2914 if (alloc_device) {
2915 dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
2916 if (!dev)
2917 return NULL;
2918 memset(dev, 0, sizeof (struct net_device));
2919 }
2920
2921 dev->priv = privptr;
2922 privptr->fsm = init_fsm("ctcdev", dev_state_names,
2923 dev_event_names, NR_DEV_STATES, NR_DEV_EVENTS,
2924 dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
2925 if (privptr->fsm == NULL) {
2926 if (alloc_device)
2927 kfree(dev);
2928 return NULL;
2929 }
2930 fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
2931 fsm_settimer(privptr->fsm, &privptr->restart_timer);
2932 if (dev->mtu == 0)
2933 dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2;
2934 dev->hard_start_xmit = ctc_tx;
2935 dev->open = ctc_open;
2936 dev->stop = ctc_close;
2937 dev->get_stats = ctc_stats;
2938 dev->change_mtu = ctc_change_mtu;
2939 dev->hard_header_len = LL_HEADER_LENGTH + 2;
2940 dev->addr_len = 0;
2941 dev->type = ARPHRD_SLIP;
2942 dev->tx_queue_len = 100;
2943 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2944 SET_MODULE_OWNER(dev);
2945 return dev;
2946}
2947
2948static ssize_t 2656static ssize_t
2949ctc_proto_show(struct device *dev, char *buf) 2657ctc_proto_show(struct device *dev, char *buf)
2950{ 2658{
@@ -2977,7 +2685,6 @@ ctc_proto_store(struct device *dev, const char *buf, size_t count)
2977 return count; 2685 return count;
2978} 2686}
2979 2687
2980static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store);
2981 2688
2982static ssize_t 2689static ssize_t
2983ctc_type_show(struct device *dev, char *buf) 2690ctc_type_show(struct device *dev, char *buf)
@@ -2991,8 +2698,13 @@ ctc_type_show(struct device *dev, char *buf)
2991 return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]); 2698 return sprintf(buf, "%s\n", cu3088_type[cgdev->cdev[0]->id.driver_info]);
2992} 2699}
2993 2700
2701static DEVICE_ATTR(buffer, 0644, buffer_show, buffer_write);
2702static DEVICE_ATTR(protocol, 0644, ctc_proto_show, ctc_proto_store);
2994static DEVICE_ATTR(type, 0444, ctc_type_show, NULL); 2703static DEVICE_ATTR(type, 0444, ctc_type_show, NULL);
2995 2704
2705static DEVICE_ATTR(loglevel, 0644, loglevel_show, loglevel_write);
2706static DEVICE_ATTR(stats, 0644, stats_show, stats_write);
2707
2996static struct attribute *ctc_attr[] = { 2708static struct attribute *ctc_attr[] = {
2997 &dev_attr_protocol.attr, 2709 &dev_attr_protocol.attr,
2998 &dev_attr_type.attr, 2710 &dev_attr_type.attr,
@@ -3005,6 +2717,21 @@ static struct attribute_group ctc_attr_group = {
3005}; 2717};
3006 2718
3007static int 2719static int
2720ctc_add_attributes(struct device *dev)
2721{
2722 device_create_file(dev, &dev_attr_loglevel);
2723 device_create_file(dev, &dev_attr_stats);
2724 return 0;
2725}
2726
2727static void
2728ctc_remove_attributes(struct device *dev)
2729{
2730 device_remove_file(dev, &dev_attr_stats);
2731 device_remove_file(dev, &dev_attr_loglevel);
2732}
2733
2734static int
3008ctc_add_files(struct device *dev) 2735ctc_add_files(struct device *dev)
3009{ 2736{
3010 pr_debug("%s() called\n", __FUNCTION__); 2737 pr_debug("%s() called\n", __FUNCTION__);
@@ -3028,15 +2755,15 @@ ctc_remove_files(struct device *dev)
3028 * 2755 *
3029 * @returns 0 on success, !0 on failure. 2756 * @returns 0 on success, !0 on failure.
3030 */ 2757 */
3031
3032static int 2758static int
3033ctc_probe_device(struct ccwgroup_device *cgdev) 2759ctc_probe_device(struct ccwgroup_device *cgdev)
3034{ 2760{
3035 struct ctc_priv *priv; 2761 struct ctc_priv *priv;
3036 int rc; 2762 int rc;
2763 char buffer[16];
3037 2764
3038 pr_debug("%s() called\n", __FUNCTION__); 2765 pr_debug("%s() called\n", __FUNCTION__);
3039 DBF_TEXT(trace, 3, __FUNCTION__); 2766 DBF_TEXT(setup, 3, __FUNCTION__);
3040 2767
3041 if (!get_device(&cgdev->dev)) 2768 if (!get_device(&cgdev->dev))
3042 return -ENODEV; 2769 return -ENODEV;
@@ -3060,10 +2787,70 @@ ctc_probe_device(struct ccwgroup_device *cgdev)
3060 cgdev->cdev[1]->handler = ctc_irq_handler; 2787 cgdev->cdev[1]->handler = ctc_irq_handler;
3061 cgdev->dev.driver_data = priv; 2788 cgdev->dev.driver_data = priv;
3062 2789
2790 sprintf(buffer, "%p", priv);
2791 DBF_TEXT(data, 3, buffer);
2792
2793 sprintf(buffer, "%u", (unsigned int)sizeof(struct ctc_priv));
2794 DBF_TEXT(data, 3, buffer);
2795
2796 sprintf(buffer, "%p", &channels);
2797 DBF_TEXT(data, 3, buffer);
2798
2799 sprintf(buffer, "%u", (unsigned int)sizeof(struct channel));
2800 DBF_TEXT(data, 3, buffer);
2801
3063 return 0; 2802 return 0;
3064} 2803}
3065 2804
3066/** 2805/**
2806 * Initialize everything of the net device except the name and the
2807 * channel structs.
2808 */
2809static struct net_device *
2810ctc_init_netdevice(struct net_device * dev, int alloc_device,
2811 struct ctc_priv *privptr)
2812{
2813 if (!privptr)
2814 return NULL;
2815
2816 DBF_TEXT(setup, 3, __FUNCTION__);
2817
2818 if (alloc_device) {
2819 dev = kmalloc(sizeof (struct net_device), GFP_KERNEL);
2820 if (!dev)
2821 return NULL;
2822 memset(dev, 0, sizeof (struct net_device));
2823 }
2824
2825 dev->priv = privptr;
2826 privptr->fsm = init_fsm("ctcdev", dev_state_names,
2827 dev_event_names, CTC_NR_DEV_STATES, CTC_NR_DEV_EVENTS,
2828 dev_fsm, DEV_FSM_LEN, GFP_KERNEL);
2829 if (privptr->fsm == NULL) {
2830 if (alloc_device)
2831 kfree(dev);
2832 return NULL;
2833 }
2834 fsm_newstate(privptr->fsm, DEV_STATE_STOPPED);
2835 fsm_settimer(privptr->fsm, &privptr->restart_timer);
2836 if (dev->mtu == 0)
2837 dev->mtu = CTC_BUFSIZE_DEFAULT - LL_HEADER_LENGTH - 2;
2838 dev->hard_start_xmit = ctc_tx;
2839 dev->open = ctc_open;
2840 dev->stop = ctc_close;
2841 dev->get_stats = ctc_stats;
2842 dev->change_mtu = ctc_change_mtu;
2843 dev->hard_header_len = LL_HEADER_LENGTH + 2;
2844 dev->addr_len = 0;
2845 dev->type = ARPHRD_SLIP;
2846 dev->tx_queue_len = 100;
2847 dev->flags = IFF_POINTOPOINT | IFF_NOARP;
2848 SET_MODULE_OWNER(dev);
2849 return dev;
2850}
2851
2852
2853/**
3067 * 2854 *
3068 * Setup an interface. 2855 * Setup an interface.
3069 * 2856 *
@@ -3081,6 +2868,7 @@ ctc_new_device(struct ccwgroup_device *cgdev)
3081 struct ctc_priv *privptr; 2868 struct ctc_priv *privptr;
3082 struct net_device *dev; 2869 struct net_device *dev;
3083 int ret; 2870 int ret;
2871 char buffer[16];
3084 2872
3085 pr_debug("%s() called\n", __FUNCTION__); 2873 pr_debug("%s() called\n", __FUNCTION__);
3086 DBF_TEXT(setup, 3, __FUNCTION__); 2874 DBF_TEXT(setup, 3, __FUNCTION__);
@@ -3089,6 +2877,9 @@ ctc_new_device(struct ccwgroup_device *cgdev)
3089 if (!privptr) 2877 if (!privptr)
3090 return -ENODEV; 2878 return -ENODEV;
3091 2879
2880 sprintf(buffer, "%d", privptr->buffer_size);
2881 DBF_TEXT(setup, 3, buffer);
2882
3092 type = get_channel_type(&cgdev->cdev[0]->id); 2883 type = get_channel_type(&cgdev->cdev[0]->id);
3093 2884
3094 snprintf(read_id, CTC_ID_SIZE, "ch-%s", cgdev->cdev[0]->dev.bus_id); 2885 snprintf(read_id, CTC_ID_SIZE, "ch-%s", cgdev->cdev[0]->dev.bus_id);
@@ -3177,9 +2968,10 @@ ctc_shutdown_device(struct ccwgroup_device *cgdev)
3177 struct ctc_priv *priv; 2968 struct ctc_priv *priv;
3178 struct net_device *ndev; 2969 struct net_device *ndev;
3179 2970
3180 DBF_TEXT(trace, 3, __FUNCTION__); 2971 DBF_TEXT(setup, 3, __FUNCTION__);
3181 pr_debug("%s() called\n", __FUNCTION__); 2972 pr_debug("%s() called\n", __FUNCTION__);
3182 2973
2974
3183 priv = cgdev->dev.driver_data; 2975 priv = cgdev->dev.driver_data;
3184 ndev = NULL; 2976 ndev = NULL;
3185 if (!priv) 2977 if (!priv)
@@ -3215,7 +3007,6 @@ ctc_shutdown_device(struct ccwgroup_device *cgdev)
3215 channel_remove(priv->channel[READ]); 3007 channel_remove(priv->channel[READ]);
3216 if (priv->channel[WRITE]) 3008 if (priv->channel[WRITE])
3217 channel_remove(priv->channel[WRITE]); 3009 channel_remove(priv->channel[WRITE]);
3218
3219 priv->channel[READ] = priv->channel[WRITE] = NULL; 3010 priv->channel[READ] = priv->channel[WRITE] = NULL;
3220 3011
3221 return 0; 3012 return 0;
@@ -3228,7 +3019,7 @@ ctc_remove_device(struct ccwgroup_device *cgdev)
3228 struct ctc_priv *priv; 3019 struct ctc_priv *priv;
3229 3020
3230 pr_debug("%s() called\n", __FUNCTION__); 3021 pr_debug("%s() called\n", __FUNCTION__);
3231 DBF_TEXT(trace, 3, __FUNCTION__); 3022 DBF_TEXT(setup, 3, __FUNCTION__);
3232 3023
3233 priv = cgdev->dev.driver_data; 3024 priv = cgdev->dev.driver_data;
3234 if (!priv) 3025 if (!priv)
@@ -3265,6 +3056,7 @@ static struct ccwgroup_driver ctc_group_driver = {
3265static void __exit 3056static void __exit
3266ctc_exit(void) 3057ctc_exit(void)
3267{ 3058{
3059 DBF_TEXT(setup, 3, __FUNCTION__);
3268 unregister_cu3088_discipline(&ctc_group_driver); 3060 unregister_cu3088_discipline(&ctc_group_driver);
3269 ctc_tty_cleanup(); 3061 ctc_tty_cleanup();
3270 ctc_unregister_dbf_views(); 3062 ctc_unregister_dbf_views();
@@ -3282,6 +3074,10 @@ ctc_init(void)
3282{ 3074{
3283 int ret = 0; 3075 int ret = 0;
3284 3076
3077 loglevel = CTC_LOGLEVEL_DEFAULT;
3078
3079 DBF_TEXT(setup, 3, __FUNCTION__);
3080
3285 print_banner(); 3081 print_banner();
3286 3082
3287 ret = ctc_register_dbf_views(); 3083 ret = ctc_register_dbf_views();
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-03 00:56:22 -0500