Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * drivers/s390/net/claw.c | |
3 | * ESCON CLAW network driver | |
4 | * | |
8e84c801 | 5 | * Linux for zSeries version |
88efc2c5 | 6 | * Copyright IBM Corp. 2002, 2009 |
1da177e4 | 7 | * Author(s) Original code written by: |
88efc2c5 | 8 | * Kazuo Iimura <iimura@jp.ibm.com> |
1da177e4 | 9 | * Rewritten by |
88efc2c5 FB |
10 | * Andy Richter <richtera@us.ibm.com> |
11 | * Marc Price <mwprice@us.ibm.com> | |
1da177e4 LT |
12 | * |
13 | * sysfs parms: | |
14 | * group x.x.rrrr,x.x.wwww | |
15 | * read_buffer nnnnnnn | |
16 | * write_buffer nnnnnn | |
17 | * host_name aaaaaaaa | |
18 | * adapter_name aaaaaaaa | |
19 | * api_type aaaaaaaa | |
20 | * | |
21 | * eg. | |
22 | * group 0.0.0200 0.0.0201 | |
23 | * read_buffer 25 | |
24 | * write_buffer 20 | |
25 | * host_name LINUX390 | |
26 | * adapter_name RS6K | |
27 | * api_type TCPIP | |
28 | * | |
29 | * where | |
30 | * | |
31 | * The device id is decided by the order entries | |
32 | * are added to the group the first is claw0 the second claw1 | |
33 | * up to CLAW_MAX_DEV | |
34 | * | |
35 | * rrrr - the first of 2 consecutive device addresses used for the | |
36 | * CLAW protocol. | |
37 | * The specified address is always used as the input (Read) | |
38 | * channel and the next address is used as the output channel. | |
39 | * | |
40 | * wwww - the second of 2 consecutive device addresses used for | |
41 | * the CLAW protocol. | |
42 | * The specified address is always used as the output | |
43 | * channel and the previous address is used as the input channel. | |
44 | * | |
45 | * read_buffer - specifies number of input buffers to allocate. | |
46 | * write_buffer - specifies number of output buffers to allocate. | |
47 | * host_name - host name | |
48 | * adaptor_name - adaptor name | |
49 | * api_type - API type TCPIP or API will be sent and expected | |
50 | * as ws_name | |
51 | * | |
52 | * Note the following requirements: | |
53 | * 1) host_name must match the configured adapter_name on the remote side | |
54 | * 2) adaptor_name must match the configured host name on the remote side | |
55 | * | |
56 | * Change History | |
57 | * 1.00 Initial release shipped | |
58 | * 1.10 Changes for Buffer allocation | |
59 | * 1.15 Changed for 2.6 Kernel No longer compiles on 2.4 or lower | |
60 | * 1.25 Added Packing support | |
b805da74 | 61 | * 1.5 |
1da177e4 | 62 | */ |
4811fcb7 AR |
63 | |
64 | #define KMSG_COMPONENT "claw" | |
65 | ||
1da177e4 LT |
66 | #include <asm/ccwdev.h> |
67 | #include <asm/ccwgroup.h> | |
68 | #include <asm/debug.h> | |
69 | #include <asm/idals.h> | |
70 | #include <asm/io.h> | |
1977f032 | 71 | #include <linux/bitops.h> |
1da177e4 LT |
72 | #include <linux/ctype.h> |
73 | #include <linux/delay.h> | |
74 | #include <linux/errno.h> | |
75 | #include <linux/if_arp.h> | |
76 | #include <linux/init.h> | |
77 | #include <linux/interrupt.h> | |
78 | #include <linux/ip.h> | |
79 | #include <linux/kernel.h> | |
80 | #include <linux/module.h> | |
81 | #include <linux/netdevice.h> | |
82 | #include <linux/etherdevice.h> | |
83 | #include <linux/proc_fs.h> | |
84 | #include <linux/sched.h> | |
85 | #include <linux/signal.h> | |
86 | #include <linux/skbuff.h> | |
87 | #include <linux/slab.h> | |
88 | #include <linux/string.h> | |
89 | #include <linux/tcp.h> | |
90 | #include <linux/timer.h> | |
91 | #include <linux/types.h> | |
1da177e4 LT |
92 | |
93 | #include "cu3088.h" | |
94 | #include "claw.h" | |
95 | ||
b805da74 AR |
96 | /* |
97 | CLAW uses the s390dbf file system see claw_trace and claw_setup | |
1da177e4 LT |
98 | */ |
99 | ||
4811fcb7 | 100 | static char version[] __initdata = "CLAW driver"; |
2b67fc46 | 101 | static char debug_buffer[255]; |
1da177e4 LT |
102 | /** |
103 | * Debug Facility Stuff | |
104 | */ | |
105 | static debug_info_t *claw_dbf_setup; | |
106 | static debug_info_t *claw_dbf_trace; | |
107 | ||
108 | /** | |
109 | * CLAW Debug Facility functions | |
110 | */ | |
111 | static void | |
112 | claw_unregister_debug_facility(void) | |
113 | { | |
114 | if (claw_dbf_setup) | |
115 | debug_unregister(claw_dbf_setup); | |
116 | if (claw_dbf_trace) | |
117 | debug_unregister(claw_dbf_trace); | |
118 | } | |
119 | ||
120 | static int | |
121 | claw_register_debug_facility(void) | |
122 | { | |
66a464db MH |
123 | claw_dbf_setup = debug_register("claw_setup", 2, 1, 8); |
124 | claw_dbf_trace = debug_register("claw_trace", 2, 2, 8); | |
1da177e4 | 125 | if (claw_dbf_setup == NULL || claw_dbf_trace == NULL) { |
1da177e4 LT |
126 | claw_unregister_debug_facility(); |
127 | return -ENOMEM; | |
128 | } | |
129 | debug_register_view(claw_dbf_setup, &debug_hex_ascii_view); | |
130 | debug_set_level(claw_dbf_setup, 2); | |
131 | debug_register_view(claw_dbf_trace, &debug_hex_ascii_view); | |
132 | debug_set_level(claw_dbf_trace, 2); | |
133 | return 0; | |
134 | } | |
135 | ||
136 | static inline void | |
137 | claw_set_busy(struct net_device *dev) | |
138 | { | |
6951df34 | 139 | ((struct claw_privbk *)dev->ml_priv)->tbusy = 1; |
1da177e4 LT |
140 | eieio(); |
141 | } | |
142 | ||
143 | static inline void | |
144 | claw_clear_busy(struct net_device *dev) | |
145 | { | |
6951df34 | 146 | clear_bit(0, &(((struct claw_privbk *) dev->ml_priv)->tbusy)); |
1da177e4 LT |
147 | netif_wake_queue(dev); |
148 | eieio(); | |
149 | } | |
150 | ||
151 | static inline int | |
152 | claw_check_busy(struct net_device *dev) | |
153 | { | |
154 | eieio(); | |
6951df34 | 155 | return ((struct claw_privbk *) dev->ml_priv)->tbusy; |
1da177e4 LT |
156 | } |
157 | ||
158 | static inline void | |
159 | claw_setbit_busy(int nr,struct net_device *dev) | |
160 | { | |
161 | netif_stop_queue(dev); | |
6951df34 | 162 | set_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy)); |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline void | |
166 | claw_clearbit_busy(int nr,struct net_device *dev) | |
167 | { | |
6951df34 | 168 | clear_bit(nr, (void *)&(((struct claw_privbk *)dev->ml_priv)->tbusy)); |
1da177e4 LT |
169 | netif_wake_queue(dev); |
170 | } | |
171 | ||
172 | static inline int | |
173 | claw_test_and_setbit_busy(int nr,struct net_device *dev) | |
174 | { | |
175 | netif_stop_queue(dev); | |
176 | return test_and_set_bit(nr, | |
6951df34 | 177 | (void *)&(((struct claw_privbk *) dev->ml_priv)->tbusy)); |
1da177e4 LT |
178 | } |
179 | ||
180 | ||
181 | /* Functions for the DEV methods */ | |
182 | ||
183 | static int claw_probe(struct ccwgroup_device *cgdev); | |
184 | static void claw_remove_device(struct ccwgroup_device *cgdev); | |
185 | static void claw_purge_skb_queue(struct sk_buff_head *q); | |
186 | static int claw_new_device(struct ccwgroup_device *cgdev); | |
187 | static int claw_shutdown_device(struct ccwgroup_device *cgdev); | |
188 | static int claw_tx(struct sk_buff *skb, struct net_device *dev); | |
189 | static int claw_change_mtu( struct net_device *dev, int new_mtu); | |
190 | static int claw_open(struct net_device *dev); | |
191 | static void claw_irq_handler(struct ccw_device *cdev, | |
192 | unsigned long intparm, struct irb *irb); | |
193 | static void claw_irq_tasklet ( unsigned long data ); | |
194 | static int claw_release(struct net_device *dev); | |
195 | static void claw_write_retry ( struct chbk * p_ch ); | |
196 | static void claw_write_next ( struct chbk * p_ch ); | |
197 | static void claw_timer ( struct chbk * p_ch ); | |
198 | ||
199 | /* Functions */ | |
200 | static int add_claw_reads(struct net_device *dev, | |
201 | struct ccwbk* p_first, struct ccwbk* p_last); | |
4d284cac HC |
202 | static void ccw_check_return_code (struct ccw_device *cdev, int return_code); |
203 | static void ccw_check_unit_check (struct chbk * p_ch, unsigned char sense ); | |
1da177e4 LT |
204 | static int find_link(struct net_device *dev, char *host_name, char *ws_name ); |
205 | static int claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid); | |
206 | static int init_ccw_bk(struct net_device *dev); | |
207 | static void probe_error( struct ccwgroup_device *cgdev); | |
208 | static struct net_device_stats *claw_stats(struct net_device *dev); | |
4d284cac | 209 | static int pages_to_order_of_mag(int num_of_pages); |
1da177e4 | 210 | static struct sk_buff *claw_pack_skb(struct claw_privbk *privptr); |
1da177e4 | 211 | /* sysfs Functions */ |
4811fcb7 AR |
212 | static ssize_t claw_hname_show(struct device *dev, |
213 | struct device_attribute *attr, char *buf); | |
214 | static ssize_t claw_hname_write(struct device *dev, | |
215 | struct device_attribute *attr, | |
1da177e4 | 216 | const char *buf, size_t count); |
4811fcb7 AR |
217 | static ssize_t claw_adname_show(struct device *dev, |
218 | struct device_attribute *attr, char *buf); | |
219 | static ssize_t claw_adname_write(struct device *dev, | |
220 | struct device_attribute *attr, | |
1da177e4 | 221 | const char *buf, size_t count); |
4811fcb7 AR |
222 | static ssize_t claw_apname_show(struct device *dev, |
223 | struct device_attribute *attr, char *buf); | |
224 | static ssize_t claw_apname_write(struct device *dev, | |
225 | struct device_attribute *attr, | |
1da177e4 | 226 | const char *buf, size_t count); |
4811fcb7 AR |
227 | static ssize_t claw_wbuff_show(struct device *dev, |
228 | struct device_attribute *attr, char *buf); | |
229 | static ssize_t claw_wbuff_write(struct device *dev, | |
230 | struct device_attribute *attr, | |
1da177e4 | 231 | const char *buf, size_t count); |
4811fcb7 AR |
232 | static ssize_t claw_rbuff_show(struct device *dev, |
233 | struct device_attribute *attr, char *buf); | |
234 | static ssize_t claw_rbuff_write(struct device *dev, | |
235 | struct device_attribute *attr, | |
1da177e4 LT |
236 | const char *buf, size_t count); |
237 | static int claw_add_files(struct device *dev); | |
238 | static void claw_remove_files(struct device *dev); | |
239 | ||
240 | /* Functions for System Validate */ | |
241 | static int claw_process_control( struct net_device *dev, struct ccwbk * p_ccw); | |
242 | static int claw_send_control(struct net_device *dev, __u8 type, __u8 link, | |
243 | __u8 correlator, __u8 rc , char *local_name, char *remote_name); | |
244 | static int claw_snd_conn_req(struct net_device *dev, __u8 link); | |
245 | static int claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl); | |
246 | static int claw_snd_sys_validate_rsp(struct net_device *dev, | |
247 | struct clawctl * p_ctl, __u32 return_code); | |
248 | static int claw_strt_conn_req(struct net_device *dev ); | |
b805da74 AR |
249 | static void claw_strt_read(struct net_device *dev, int lock); |
250 | static void claw_strt_out_IO(struct net_device *dev); | |
251 | static void claw_free_wrt_buf(struct net_device *dev); | |
1da177e4 LT |
252 | |
253 | /* Functions for unpack reads */ | |
b805da74 | 254 | static void unpack_read(struct net_device *dev); |
1da177e4 | 255 | |
88efc2c5 FB |
256 | static int claw_pm_prepare(struct ccwgroup_device *gdev) |
257 | { | |
258 | return -EPERM; | |
259 | } | |
260 | ||
1da177e4 LT |
261 | /* ccwgroup table */ |
262 | ||
263 | static struct ccwgroup_driver claw_group_driver = { | |
264 | .owner = THIS_MODULE, | |
265 | .name = "claw", | |
266 | .max_slaves = 2, | |
267 | .driver_id = 0xC3D3C1E6, | |
268 | .probe = claw_probe, | |
269 | .remove = claw_remove_device, | |
270 | .set_online = claw_new_device, | |
271 | .set_offline = claw_shutdown_device, | |
88efc2c5 | 272 | .prepare = claw_pm_prepare, |
1da177e4 LT |
273 | }; |
274 | ||
275 | /* | |
1da177e4 LT |
276 | * Key functions |
277 | */ | |
278 | ||
279 | /*----------------------------------------------------------------* | |
280 | * claw_probe * | |
281 | * this function is called for each CLAW device. * | |
282 | *----------------------------------------------------------------*/ | |
283 | static int | |
284 | claw_probe(struct ccwgroup_device *cgdev) | |
285 | { | |
286 | int rc; | |
287 | struct claw_privbk *privptr=NULL; | |
288 | ||
b805da74 | 289 | CLAW_DBF_TEXT(2, setup, "probe"); |
1da177e4 LT |
290 | if (!get_device(&cgdev->dev)) |
291 | return -ENODEV; | |
88abaab4 | 292 | privptr = kzalloc(sizeof(struct claw_privbk), GFP_KERNEL); |
dff59b64 | 293 | dev_set_drvdata(&cgdev->dev, privptr); |
1da177e4 LT |
294 | if (privptr == NULL) { |
295 | probe_error(cgdev); | |
296 | put_device(&cgdev->dev); | |
b805da74 | 297 | CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); |
1da177e4 LT |
298 | return -ENOMEM; |
299 | } | |
dd00cc48 YP |
300 | privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL); |
301 | privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL); | |
1da177e4 LT |
302 | if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) { |
303 | probe_error(cgdev); | |
304 | put_device(&cgdev->dev); | |
b805da74 | 305 | CLAW_DBF_TEXT_(2, setup, "probex%d", -ENOMEM); |
1da177e4 LT |
306 | return -ENOMEM; |
307 | } | |
1da177e4 LT |
308 | memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8); |
309 | memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8); | |
310 | memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8); | |
311 | privptr->p_env->packing = 0; | |
312 | privptr->p_env->write_buffers = 5; | |
313 | privptr->p_env->read_buffers = 5; | |
314 | privptr->p_env->read_size = CLAW_FRAME_SIZE; | |
315 | privptr->p_env->write_size = CLAW_FRAME_SIZE; | |
316 | rc = claw_add_files(&cgdev->dev); | |
317 | if (rc) { | |
318 | probe_error(cgdev); | |
319 | put_device(&cgdev->dev); | |
4811fcb7 AR |
320 | dev_err(&cgdev->dev, "Creating the /proc files for a new" |
321 | " CLAW device failed\n"); | |
b805da74 | 322 | CLAW_DBF_TEXT_(2, setup, "probex%d", rc); |
1da177e4 LT |
323 | return rc; |
324 | } | |
1da177e4 LT |
325 | privptr->p_env->p_priv = privptr; |
326 | cgdev->cdev[0]->handler = claw_irq_handler; | |
327 | cgdev->cdev[1]->handler = claw_irq_handler; | |
b805da74 | 328 | CLAW_DBF_TEXT(2, setup, "prbext 0"); |
1da177e4 LT |
329 | |
330 | return 0; | |
331 | } /* end of claw_probe */ | |
332 | ||
333 | /*-------------------------------------------------------------------* | |
334 | * claw_tx * | |
335 | *-------------------------------------------------------------------*/ | |
336 | ||
337 | static int | |
338 | claw_tx(struct sk_buff *skb, struct net_device *dev) | |
339 | { | |
340 | int rc; | |
6951df34 | 341 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 LT |
342 | unsigned long saveflags; |
343 | struct chbk *p_ch; | |
344 | ||
b805da74 | 345 | CLAW_DBF_TEXT(4, trace, "claw_tx"); |
1da177e4 | 346 | p_ch=&privptr->channel[WRITE]; |
1da177e4 LT |
347 | spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags); |
348 | rc=claw_hw_tx( skb, dev, 1 ); | |
349 | spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags); | |
b805da74 | 350 | CLAW_DBF_TEXT_(4, trace, "clawtx%d", rc); |
8f0c40d4 UB |
351 | if (rc) |
352 | rc = NETDEV_TX_BUSY; | |
1da177e4 LT |
353 | return rc; |
354 | } /* end of claw_tx */ | |
355 | ||
356 | /*------------------------------------------------------------------* | |
357 | * pack the collect queue into an skb and return it * | |
358 | * If not packing just return the top skb from the queue * | |
359 | *------------------------------------------------------------------*/ | |
360 | ||
361 | static struct sk_buff * | |
362 | claw_pack_skb(struct claw_privbk *privptr) | |
363 | { | |
364 | struct sk_buff *new_skb,*held_skb; | |
365 | struct chbk *p_ch = &privptr->channel[WRITE]; | |
366 | struct claw_env *p_env = privptr->p_env; | |
367 | int pkt_cnt,pk_ind,so_far; | |
368 | ||
369 | new_skb = NULL; /* assume no dice */ | |
370 | pkt_cnt = 0; | |
b805da74 | 371 | CLAW_DBF_TEXT(4, trace, "PackSKBe"); |
b03efcfb | 372 | if (!skb_queue_empty(&p_ch->collect_queue)) { |
1da177e4 LT |
373 | /* some data */ |
374 | held_skb = skb_dequeue(&p_ch->collect_queue); | |
1da177e4 | 375 | if (held_skb) |
8e84c801 | 376 | dev_kfree_skb_any(held_skb); |
1da177e4 LT |
377 | else |
378 | return NULL; | |
8e84c801 FP |
379 | if (p_env->packing != DO_PACKED) |
380 | return held_skb; | |
1da177e4 LT |
381 | /* get a new SKB we will pack at least one */ |
382 | new_skb = dev_alloc_skb(p_env->write_size); | |
383 | if (new_skb == NULL) { | |
384 | atomic_inc(&held_skb->users); | |
385 | skb_queue_head(&p_ch->collect_queue,held_skb); | |
386 | return NULL; | |
387 | } | |
388 | /* we have packed packet and a place to put it */ | |
389 | pk_ind = 1; | |
390 | so_far = 0; | |
391 | new_skb->cb[1] = 'P'; /* every skb on queue has pack header */ | |
392 | while ((pk_ind) && (held_skb != NULL)) { | |
393 | if (held_skb->len+so_far <= p_env->write_size-8) { | |
394 | memcpy(skb_put(new_skb,held_skb->len), | |
395 | held_skb->data,held_skb->len); | |
396 | privptr->stats.tx_packets++; | |
397 | so_far += held_skb->len; | |
398 | pkt_cnt++; | |
8e84c801 | 399 | dev_kfree_skb_any(held_skb); |
1da177e4 LT |
400 | held_skb = skb_dequeue(&p_ch->collect_queue); |
401 | if (held_skb) | |
402 | atomic_dec(&held_skb->users); | |
403 | } else { | |
404 | pk_ind = 0; | |
405 | atomic_inc(&held_skb->users); | |
406 | skb_queue_head(&p_ch->collect_queue,held_skb); | |
407 | } | |
408 | } | |
1da177e4 | 409 | } |
b805da74 | 410 | CLAW_DBF_TEXT(4, trace, "PackSKBx"); |
1da177e4 LT |
411 | return new_skb; |
412 | } | |
413 | ||
414 | /*-------------------------------------------------------------------* | |
415 | * claw_change_mtu * | |
416 | * * | |
417 | *-------------------------------------------------------------------*/ | |
418 | ||
419 | static int | |
420 | claw_change_mtu(struct net_device *dev, int new_mtu) | |
421 | { | |
6951df34 | 422 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 | 423 | int buff_size; |
b805da74 | 424 | CLAW_DBF_TEXT(4, trace, "setmtu"); |
1da177e4 LT |
425 | buff_size = privptr->p_env->write_size; |
426 | if ((new_mtu < 60) || (new_mtu > buff_size)) { | |
1da177e4 LT |
427 | return -EINVAL; |
428 | } | |
429 | dev->mtu = new_mtu; | |
1da177e4 LT |
430 | return 0; |
431 | } /* end of claw_change_mtu */ | |
432 | ||
433 | ||
434 | /*-------------------------------------------------------------------* | |
435 | * claw_open * | |
436 | * * | |
437 | *-------------------------------------------------------------------*/ | |
438 | static int | |
439 | claw_open(struct net_device *dev) | |
440 | { | |
441 | ||
442 | int rc; | |
443 | int i; | |
444 | unsigned long saveflags=0; | |
445 | unsigned long parm; | |
446 | struct claw_privbk *privptr; | |
447 | DECLARE_WAITQUEUE(wait, current); | |
448 | struct timer_list timer; | |
449 | struct ccwbk *p_buf; | |
450 | ||
b805da74 | 451 | CLAW_DBF_TEXT(4, trace, "open"); |
6951df34 | 452 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
453 | /* allocate and initialize CCW blocks */ |
454 | if (privptr->buffs_alloc == 0) { | |
455 | rc=init_ccw_bk(dev); | |
456 | if (rc) { | |
b805da74 | 457 | CLAW_DBF_TEXT(2, trace, "openmem"); |
1da177e4 LT |
458 | return -ENOMEM; |
459 | } | |
460 | } | |
461 | privptr->system_validate_comp=0; | |
462 | privptr->release_pend=0; | |
463 | if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { | |
464 | privptr->p_env->read_size=DEF_PACK_BUFSIZE; | |
465 | privptr->p_env->write_size=DEF_PACK_BUFSIZE; | |
466 | privptr->p_env->packing=PACKING_ASK; | |
467 | } else { | |
468 | privptr->p_env->packing=0; | |
469 | privptr->p_env->read_size=CLAW_FRAME_SIZE; | |
470 | privptr->p_env->write_size=CLAW_FRAME_SIZE; | |
471 | } | |
472 | claw_set_busy(dev); | |
473 | tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet, | |
474 | (unsigned long) &privptr->channel[READ]); | |
475 | for ( i = 0; i < 2; i++) { | |
b805da74 | 476 | CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i); |
1da177e4 LT |
477 | init_waitqueue_head(&privptr->channel[i].wait); |
478 | /* skb_queue_head_init(&p_ch->io_queue); */ | |
479 | if (i == WRITE) | |
480 | skb_queue_head_init( | |
481 | &privptr->channel[WRITE].collect_queue); | |
482 | privptr->channel[i].flag_a = 0; | |
483 | privptr->channel[i].IO_active = 0; | |
484 | privptr->channel[i].flag &= ~CLAW_TIMER; | |
485 | init_timer(&timer); | |
486 | timer.function = (void *)claw_timer; | |
487 | timer.data = (unsigned long)(&privptr->channel[i]); | |
488 | timer.expires = jiffies + 15*HZ; | |
489 | add_timer(&timer); | |
490 | spin_lock_irqsave(get_ccwdev_lock( | |
491 | privptr->channel[i].cdev), saveflags); | |
492 | parm = (unsigned long) &privptr->channel[i]; | |
493 | privptr->channel[i].claw_state = CLAW_START_HALT_IO; | |
494 | rc = 0; | |
495 | add_wait_queue(&privptr->channel[i].wait, &wait); | |
496 | rc = ccw_device_halt( | |
497 | (struct ccw_device *)privptr->channel[i].cdev,parm); | |
498 | set_current_state(TASK_INTERRUPTIBLE); | |
499 | spin_unlock_irqrestore( | |
500 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
501 | schedule(); | |
502 | set_current_state(TASK_RUNNING); | |
503 | remove_wait_queue(&privptr->channel[i].wait, &wait); | |
504 | if(rc != 0) | |
505 | ccw_check_return_code(privptr->channel[i].cdev, rc); | |
506 | if((privptr->channel[i].flag & CLAW_TIMER) == 0x00) | |
507 | del_timer(&timer); | |
508 | } | |
509 | if ((((privptr->channel[READ].last_dstat | | |
510 | privptr->channel[WRITE].last_dstat) & | |
511 | ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) || | |
512 | (((privptr->channel[READ].flag | | |
513 | privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) { | |
4811fcb7 AR |
514 | dev_info(&privptr->channel[READ].cdev->dev, |
515 | "%s: remote side is not ready\n", dev->name); | |
b805da74 | 516 | CLAW_DBF_TEXT(2, trace, "notrdy"); |
1da177e4 LT |
517 | |
518 | for ( i = 0; i < 2; i++) { | |
519 | spin_lock_irqsave( | |
520 | get_ccwdev_lock(privptr->channel[i].cdev), | |
521 | saveflags); | |
522 | parm = (unsigned long) &privptr->channel[i]; | |
523 | privptr->channel[i].claw_state = CLAW_STOP; | |
524 | rc = ccw_device_halt( | |
525 | (struct ccw_device *)&privptr->channel[i].cdev, | |
526 | parm); | |
527 | spin_unlock_irqrestore( | |
528 | get_ccwdev_lock(privptr->channel[i].cdev), | |
529 | saveflags); | |
530 | if (rc != 0) { | |
531 | ccw_check_return_code( | |
532 | privptr->channel[i].cdev, rc); | |
533 | } | |
534 | } | |
535 | free_pages((unsigned long)privptr->p_buff_ccw, | |
536 | (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); | |
537 | if (privptr->p_env->read_size < PAGE_SIZE) { | |
538 | free_pages((unsigned long)privptr->p_buff_read, | |
539 | (int)pages_to_order_of_mag( | |
540 | privptr->p_buff_read_num)); | |
541 | } | |
542 | else { | |
543 | p_buf=privptr->p_read_active_first; | |
544 | while (p_buf!=NULL) { | |
545 | free_pages((unsigned long)p_buf->p_buffer, | |
546 | (int)pages_to_order_of_mag( | |
547 | privptr->p_buff_pages_perread )); | |
548 | p_buf=p_buf->next; | |
549 | } | |
550 | } | |
551 | if (privptr->p_env->write_size < PAGE_SIZE ) { | |
552 | free_pages((unsigned long)privptr->p_buff_write, | |
553 | (int)pages_to_order_of_mag( | |
554 | privptr->p_buff_write_num)); | |
555 | } | |
556 | else { | |
557 | p_buf=privptr->p_write_active_first; | |
558 | while (p_buf!=NULL) { | |
559 | free_pages((unsigned long)p_buf->p_buffer, | |
560 | (int)pages_to_order_of_mag( | |
561 | privptr->p_buff_pages_perwrite )); | |
562 | p_buf=p_buf->next; | |
563 | } | |
564 | } | |
565 | privptr->buffs_alloc = 0; | |
566 | privptr->channel[READ].flag= 0x00; | |
567 | privptr->channel[WRITE].flag = 0x00; | |
568 | privptr->p_buff_ccw=NULL; | |
569 | privptr->p_buff_read=NULL; | |
570 | privptr->p_buff_write=NULL; | |
571 | claw_clear_busy(dev); | |
b805da74 | 572 | CLAW_DBF_TEXT(2, trace, "open EIO"); |
1da177e4 LT |
573 | return -EIO; |
574 | } | |
575 | ||
576 | /* Send SystemValidate command */ | |
577 | ||
578 | claw_clear_busy(dev); | |
b805da74 | 579 | CLAW_DBF_TEXT(4, trace, "openok"); |
1da177e4 LT |
580 | return 0; |
581 | } /* end of claw_open */ | |
582 | ||
583 | /*-------------------------------------------------------------------* | |
584 | * * | |
585 | * claw_irq_handler * | |
586 | * * | |
587 | *--------------------------------------------------------------------*/ | |
588 | static void | |
589 | claw_irq_handler(struct ccw_device *cdev, | |
590 | unsigned long intparm, struct irb *irb) | |
591 | { | |
592 | struct chbk *p_ch = NULL; | |
593 | struct claw_privbk *privptr = NULL; | |
594 | struct net_device *dev = NULL; | |
595 | struct claw_env *p_env; | |
596 | struct chbk *p_ch_r=NULL; | |
597 | ||
b805da74 | 598 | CLAW_DBF_TEXT(4, trace, "clawirq"); |
1da177e4 | 599 | /* Bypass all 'unsolicited interrupts' */ |
dff59b64 GKH |
600 | privptr = dev_get_drvdata(&cdev->dev); |
601 | if (!privptr) { | |
4811fcb7 AR |
602 | dev_warn(&cdev->dev, "An uninitialized CLAW device received an" |
603 | " IRQ, c-%02x d-%02x\n", | |
604 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); | |
b805da74 | 605 | CLAW_DBF_TEXT(2, trace, "badirq"); |
1da177e4 LT |
606 | return; |
607 | } | |
1da177e4 LT |
608 | |
609 | /* Try to extract channel from driver data. */ | |
610 | if (privptr->channel[READ].cdev == cdev) | |
611 | p_ch = &privptr->channel[READ]; | |
612 | else if (privptr->channel[WRITE].cdev == cdev) | |
613 | p_ch = &privptr->channel[WRITE]; | |
614 | else { | |
4811fcb7 | 615 | dev_warn(&cdev->dev, "The device is not a CLAW device\n"); |
b805da74 | 616 | CLAW_DBF_TEXT(2, trace, "badchan"); |
1da177e4 LT |
617 | return; |
618 | } | |
b805da74 | 619 | CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag); |
1da177e4 LT |
620 | |
621 | dev = (struct net_device *) (p_ch->ndev); | |
622 | p_env=privptr->p_env; | |
623 | ||
1da177e4 LT |
624 | /* Copy interruption response block. */ |
625 | memcpy(p_ch->irb, irb, sizeof(struct irb)); | |
626 | ||
b805da74 | 627 | /* Check for good subchannel return code, otherwise info message */ |
23d805b6 | 628 | if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) { |
4811fcb7 AR |
629 | dev_info(&cdev->dev, |
630 | "%s: subchannel check for device: %04x -" | |
1da177e4 LT |
631 | " Sch Stat %02x Dev Stat %02x CPA - %04x\n", |
632 | dev->name, p_ch->devno, | |
23d805b6 PO |
633 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat, |
634 | irb->scsw.cmd.cpa); | |
b805da74 | 635 | CLAW_DBF_TEXT(2, trace, "chanchk"); |
1da177e4 LT |
636 | /* return; */ |
637 | } | |
638 | ||
639 | /* Check the reason-code of a unit check */ | |
23d805b6 | 640 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 | 641 | ccw_check_unit_check(p_ch, irb->ecw[0]); |
1da177e4 LT |
642 | |
643 | /* State machine to bring the connection up, down and to restart */ | |
23d805b6 | 644 | p_ch->last_dstat = irb->scsw.cmd.dstat; |
1da177e4 LT |
645 | |
646 | switch (p_ch->claw_state) { | |
b805da74 AR |
647 | case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */ |
648 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
649 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
650 | (p_ch->irb->scsw.cmd.stctl == | |
651 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) | |
652 | return; | |
653 | wake_up(&p_ch->wait); /* wake up claw_release */ | |
654 | CLAW_DBF_TEXT(4, trace, "stop"); | |
655 | return; | |
656 | case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */ | |
657 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
658 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
659 | (p_ch->irb->scsw.cmd.stctl == | |
660 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
661 | CLAW_DBF_TEXT(4, trace, "haltio"); | |
662 | return; | |
663 | } | |
664 | if (p_ch->flag == CLAW_READ) { | |
665 | p_ch->claw_state = CLAW_START_READ; | |
666 | wake_up(&p_ch->wait); /* wake claw_open (READ)*/ | |
667 | } else if (p_ch->flag == CLAW_WRITE) { | |
668 | p_ch->claw_state = CLAW_START_WRITE; | |
4811fcb7 | 669 | /* send SYSTEM_VALIDATE */ |
b805da74 AR |
670 | claw_strt_read(dev, LOCK_NO); |
671 | claw_send_control(dev, | |
672 | SYSTEM_VALIDATE_REQUEST, | |
673 | 0, 0, 0, | |
674 | p_env->host_name, | |
675 | p_env->adapter_name); | |
676 | } else { | |
4811fcb7 AR |
677 | dev_warn(&cdev->dev, "The CLAW device received" |
678 | " an unexpected IRQ, " | |
679 | "c-%02x d-%02x\n", | |
b805da74 AR |
680 | irb->scsw.cmd.cstat, |
681 | irb->scsw.cmd.dstat); | |
682 | return; | |
683 | } | |
684 | CLAW_DBF_TEXT(4, trace, "haltio"); | |
685 | return; | |
686 | case CLAW_START_READ: | |
687 | CLAW_DBF_TEXT(4, trace, "ReadIRQ"); | |
688 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
689 | clear_bit(0, (void *)&p_ch->IO_active); | |
690 | if ((p_ch->irb->ecw[0] & 0x41) == 0x41 || | |
691 | (p_ch->irb->ecw[0] & 0x40) == 0x40 || | |
692 | (p_ch->irb->ecw[0]) == 0) { | |
693 | privptr->stats.rx_errors++; | |
4811fcb7 AR |
694 | dev_info(&cdev->dev, |
695 | "%s: Restart is required after remote " | |
b805da74 AR |
696 | "side recovers \n", |
697 | dev->name); | |
698 | } | |
699 | CLAW_DBF_TEXT(4, trace, "notrdy"); | |
700 | return; | |
701 | } | |
702 | if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) && | |
703 | (p_ch->irb->scsw.cmd.dstat == 0)) { | |
704 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
705 | (void *)&p_ch->flag_a) == 0) | |
706 | tasklet_schedule(&p_ch->tasklet); | |
1da177e4 | 707 | else |
b805da74 AR |
708 | CLAW_DBF_TEXT(4, trace, "PCINoBH"); |
709 | CLAW_DBF_TEXT(4, trace, "PCI_read"); | |
710 | return; | |
711 | } | |
712 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
713 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
714 | (p_ch->irb->scsw.cmd.stctl == | |
715 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
716 | CLAW_DBF_TEXT(4, trace, "SPend_rd"); | |
717 | return; | |
718 | } | |
719 | clear_bit(0, (void *)&p_ch->IO_active); | |
720 | claw_clearbit_busy(TB_RETRY, dev); | |
721 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
722 | (void *)&p_ch->flag_a) == 0) | |
723 | tasklet_schedule(&p_ch->tasklet); | |
724 | else | |
725 | CLAW_DBF_TEXT(4, trace, "RdBHAct"); | |
726 | CLAW_DBF_TEXT(4, trace, "RdIRQXit"); | |
727 | return; | |
728 | case CLAW_START_WRITE: | |
729 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
4811fcb7 AR |
730 | dev_info(&cdev->dev, |
731 | "%s: Unit Check Occured in " | |
b805da74 AR |
732 | "write channel\n", dev->name); |
733 | clear_bit(0, (void *)&p_ch->IO_active); | |
734 | if (p_ch->irb->ecw[0] & 0x80) { | |
4811fcb7 AR |
735 | dev_info(&cdev->dev, |
736 | "%s: Resetting Event " | |
b805da74 AR |
737 | "occurred:\n", dev->name); |
738 | init_timer(&p_ch->timer); | |
739 | p_ch->timer.function = | |
740 | (void *)claw_write_retry; | |
741 | p_ch->timer.data = (unsigned long)p_ch; | |
742 | p_ch->timer.expires = jiffies + 10*HZ; | |
743 | add_timer(&p_ch->timer); | |
4811fcb7 AR |
744 | dev_info(&cdev->dev, |
745 | "%s: write connection " | |
b805da74 AR |
746 | "restarting\n", dev->name); |
747 | } | |
748 | CLAW_DBF_TEXT(4, trace, "rstrtwrt"); | |
749 | return; | |
750 | } | |
751 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) { | |
752 | clear_bit(0, (void *)&p_ch->IO_active); | |
4811fcb7 AR |
753 | dev_info(&cdev->dev, |
754 | "%s: Unit Exception " | |
755 | "occurred in write channel\n", | |
756 | dev->name); | |
b805da74 AR |
757 | } |
758 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
759 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
760 | (p_ch->irb->scsw.cmd.stctl == | |
761 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
762 | CLAW_DBF_TEXT(4, trace, "writeUE"); | |
763 | return; | |
764 | } | |
765 | clear_bit(0, (void *)&p_ch->IO_active); | |
766 | if (claw_test_and_setbit_busy(TB_TX, dev) == 0) { | |
767 | claw_write_next(p_ch); | |
768 | claw_clearbit_busy(TB_TX, dev); | |
769 | claw_clear_busy(dev); | |
770 | } | |
771 | p_ch_r = (struct chbk *)&privptr->channel[READ]; | |
772 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
773 | (void *)&p_ch_r->flag_a) == 0) | |
774 | tasklet_schedule(&p_ch_r->tasklet); | |
775 | CLAW_DBF_TEXT(4, trace, "StWtExit"); | |
776 | return; | |
777 | default: | |
4811fcb7 AR |
778 | dev_warn(&cdev->dev, |
779 | "The CLAW device for %s received an unexpected IRQ\n", | |
780 | dev->name); | |
b805da74 AR |
781 | CLAW_DBF_TEXT(2, trace, "badIRQ"); |
782 | return; | |
1da177e4 LT |
783 | } |
784 | ||
785 | } /* end of claw_irq_handler */ | |
786 | ||
787 | ||
788 | /*-------------------------------------------------------------------* | |
789 | * claw_irq_tasklet * | |
790 | * * | |
791 | *--------------------------------------------------------------------*/ | |
792 | static void | |
793 | claw_irq_tasklet ( unsigned long data ) | |
794 | { | |
795 | struct chbk * p_ch; | |
796 | struct net_device *dev; | |
797 | struct claw_privbk * privptr; | |
798 | ||
799 | p_ch = (struct chbk *) data; | |
800 | dev = (struct net_device *)p_ch->ndev; | |
b805da74 | 801 | CLAW_DBF_TEXT(4, trace, "IRQtask"); |
6951df34 | 802 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
803 | unpack_read(dev); |
804 | clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a); | |
b805da74 | 805 | CLAW_DBF_TEXT(4, trace, "TskletXt"); |
1da177e4 LT |
806 | return; |
807 | } /* end of claw_irq_bh */ | |
808 | ||
809 | /*-------------------------------------------------------------------* | |
810 | * claw_release * | |
811 | * * | |
812 | *--------------------------------------------------------------------*/ | |
813 | static int | |
814 | claw_release(struct net_device *dev) | |
815 | { | |
816 | int rc; | |
817 | int i; | |
818 | unsigned long saveflags; | |
819 | unsigned long parm; | |
820 | struct claw_privbk *privptr; | |
821 | DECLARE_WAITQUEUE(wait, current); | |
822 | struct ccwbk* p_this_ccw; | |
823 | struct ccwbk* p_buf; | |
824 | ||
825 | if (!dev) | |
826 | return 0; | |
6951df34 | 827 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
828 | if (!privptr) |
829 | return 0; | |
b805da74 | 830 | CLAW_DBF_TEXT(4, trace, "release"); |
1da177e4 LT |
831 | privptr->release_pend=1; |
832 | claw_setbit_busy(TB_STOP,dev); | |
833 | for ( i = 1; i >=0 ; i--) { | |
834 | spin_lock_irqsave( | |
835 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
836 | /* del_timer(&privptr->channel[READ].timer); */ | |
837 | privptr->channel[i].claw_state = CLAW_STOP; | |
838 | privptr->channel[i].IO_active = 0; | |
839 | parm = (unsigned long) &privptr->channel[i]; | |
840 | if (i == WRITE) | |
841 | claw_purge_skb_queue( | |
842 | &privptr->channel[WRITE].collect_queue); | |
843 | rc = ccw_device_halt (privptr->channel[i].cdev, parm); | |
844 | if (privptr->system_validate_comp==0x00) /* never opened? */ | |
845 | init_waitqueue_head(&privptr->channel[i].wait); | |
846 | add_wait_queue(&privptr->channel[i].wait, &wait); | |
847 | set_current_state(TASK_INTERRUPTIBLE); | |
848 | spin_unlock_irqrestore( | |
849 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
850 | schedule(); | |
851 | set_current_state(TASK_RUNNING); | |
852 | remove_wait_queue(&privptr->channel[i].wait, &wait); | |
853 | if (rc != 0) { | |
854 | ccw_check_return_code(privptr->channel[i].cdev, rc); | |
855 | } | |
856 | } | |
857 | if (privptr->pk_skb != NULL) { | |
8e84c801 | 858 | dev_kfree_skb_any(privptr->pk_skb); |
1da177e4 LT |
859 | privptr->pk_skb = NULL; |
860 | } | |
861 | if(privptr->buffs_alloc != 1) { | |
b805da74 | 862 | CLAW_DBF_TEXT(4, trace, "none2fre"); |
1da177e4 LT |
863 | return 0; |
864 | } | |
b805da74 | 865 | CLAW_DBF_TEXT(4, trace, "freebufs"); |
1da177e4 LT |
866 | if (privptr->p_buff_ccw != NULL) { |
867 | free_pages((unsigned long)privptr->p_buff_ccw, | |
868 | (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); | |
869 | } | |
b805da74 | 870 | CLAW_DBF_TEXT(4, trace, "freeread"); |
1da177e4 LT |
871 | if (privptr->p_env->read_size < PAGE_SIZE) { |
872 | if (privptr->p_buff_read != NULL) { | |
873 | free_pages((unsigned long)privptr->p_buff_read, | |
874 | (int)pages_to_order_of_mag(privptr->p_buff_read_num)); | |
875 | } | |
876 | } | |
877 | else { | |
878 | p_buf=privptr->p_read_active_first; | |
879 | while (p_buf!=NULL) { | |
880 | free_pages((unsigned long)p_buf->p_buffer, | |
881 | (int)pages_to_order_of_mag( | |
882 | privptr->p_buff_pages_perread )); | |
883 | p_buf=p_buf->next; | |
884 | } | |
885 | } | |
b805da74 | 886 | CLAW_DBF_TEXT(4, trace, "freewrit"); |
1da177e4 LT |
887 | if (privptr->p_env->write_size < PAGE_SIZE ) { |
888 | free_pages((unsigned long)privptr->p_buff_write, | |
889 | (int)pages_to_order_of_mag(privptr->p_buff_write_num)); | |
890 | } | |
891 | else { | |
892 | p_buf=privptr->p_write_active_first; | |
893 | while (p_buf!=NULL) { | |
894 | free_pages((unsigned long)p_buf->p_buffer, | |
895 | (int)pages_to_order_of_mag( | |
896 | privptr->p_buff_pages_perwrite )); | |
897 | p_buf=p_buf->next; | |
898 | } | |
899 | } | |
b805da74 | 900 | CLAW_DBF_TEXT(4, trace, "clearptr"); |
1da177e4 LT |
901 | privptr->buffs_alloc = 0; |
902 | privptr->p_buff_ccw=NULL; | |
903 | privptr->p_buff_read=NULL; | |
904 | privptr->p_buff_write=NULL; | |
905 | privptr->system_validate_comp=0; | |
906 | privptr->release_pend=0; | |
907 | /* Remove any writes that were pending and reset all reads */ | |
908 | p_this_ccw=privptr->p_read_active_first; | |
909 | while (p_this_ccw!=NULL) { | |
910 | p_this_ccw->header.length=0xffff; | |
911 | p_this_ccw->header.opcode=0xff; | |
912 | p_this_ccw->header.flag=0x00; | |
913 | p_this_ccw=p_this_ccw->next; | |
914 | } | |
915 | ||
916 | while (privptr->p_write_active_first!=NULL) { | |
917 | p_this_ccw=privptr->p_write_active_first; | |
918 | p_this_ccw->header.flag=CLAW_PENDING; | |
919 | privptr->p_write_active_first=p_this_ccw->next; | |
920 | p_this_ccw->next=privptr->p_write_free_chain; | |
921 | privptr->p_write_free_chain=p_this_ccw; | |
922 | ++privptr->write_free_count; | |
923 | } | |
924 | privptr->p_write_active_last=NULL; | |
925 | privptr->mtc_logical_link = -1; | |
926 | privptr->mtc_skipping = 1; | |
927 | privptr->mtc_offset=0; | |
928 | ||
929 | if (((privptr->channel[READ].last_dstat | | |
930 | privptr->channel[WRITE].last_dstat) & | |
931 | ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) { | |
4811fcb7 AR |
932 | dev_warn(&privptr->channel[READ].cdev->dev, |
933 | "Deactivating %s completed with incorrect" | |
934 | " subchannel status " | |
935 | "(read %02x, write %02x)\n", | |
1da177e4 LT |
936 | dev->name, |
937 | privptr->channel[READ].last_dstat, | |
938 | privptr->channel[WRITE].last_dstat); | |
b805da74 | 939 | CLAW_DBF_TEXT(2, trace, "badclose"); |
1da177e4 | 940 | } |
b805da74 | 941 | CLAW_DBF_TEXT(4, trace, "rlsexit"); |
1da177e4 LT |
942 | return 0; |
943 | } /* end of claw_release */ | |
944 | ||
1da177e4 LT |
945 | /*-------------------------------------------------------------------* |
946 | * claw_write_retry * | |
947 | * * | |
948 | *--------------------------------------------------------------------*/ | |
949 | ||
950 | static void | |
951 | claw_write_retry ( struct chbk *p_ch ) | |
952 | { | |
953 | ||
954 | struct net_device *dev=p_ch->ndev; | |
955 | ||
b805da74 | 956 | CLAW_DBF_TEXT(4, trace, "w_retry"); |
1da177e4 | 957 | if (p_ch->claw_state == CLAW_STOP) { |
1da177e4 LT |
958 | return; |
959 | } | |
1da177e4 | 960 | claw_strt_out_IO( dev ); |
b805da74 | 961 | CLAW_DBF_TEXT(4, trace, "rtry_xit"); |
1da177e4 LT |
962 | return; |
963 | } /* end of claw_write_retry */ | |
964 | ||
965 | ||
966 | /*-------------------------------------------------------------------* | |
967 | * claw_write_next * | |
968 | * * | |
969 | *--------------------------------------------------------------------*/ | |
970 | ||
971 | static void | |
972 | claw_write_next ( struct chbk * p_ch ) | |
973 | { | |
974 | ||
975 | struct net_device *dev; | |
976 | struct claw_privbk *privptr=NULL; | |
977 | struct sk_buff *pk_skb; | |
978 | int rc; | |
979 | ||
b805da74 | 980 | CLAW_DBF_TEXT(4, trace, "claw_wrt"); |
1da177e4 LT |
981 | if (p_ch->claw_state == CLAW_STOP) |
982 | return; | |
983 | dev = (struct net_device *) p_ch->ndev; | |
6951df34 | 984 | privptr = (struct claw_privbk *) dev->ml_priv; |
1da177e4 LT |
985 | claw_free_wrt_buf( dev ); |
986 | if ((privptr->write_free_count > 0) && | |
b03efcfb | 987 | !skb_queue_empty(&p_ch->collect_queue)) { |
1da177e4 LT |
988 | pk_skb = claw_pack_skb(privptr); |
989 | while (pk_skb != NULL) { | |
990 | rc = claw_hw_tx( pk_skb, dev,1); | |
991 | if (privptr->write_free_count > 0) { | |
992 | pk_skb = claw_pack_skb(privptr); | |
993 | } else | |
994 | pk_skb = NULL; | |
995 | } | |
996 | } | |
997 | if (privptr->p_write_active_first!=NULL) { | |
998 | claw_strt_out_IO(dev); | |
999 | } | |
1da177e4 LT |
1000 | return; |
1001 | } /* end of claw_write_next */ | |
1002 | ||
1003 | /*-------------------------------------------------------------------* | |
1004 | * * | |
1005 | * claw_timer * | |
1006 | *--------------------------------------------------------------------*/ | |
1007 | ||
1008 | static void | |
1009 | claw_timer ( struct chbk * p_ch ) | |
1010 | { | |
b805da74 | 1011 | CLAW_DBF_TEXT(4, trace, "timer"); |
1da177e4 LT |
1012 | p_ch->flag |= CLAW_TIMER; |
1013 | wake_up(&p_ch->wait); | |
1da177e4 LT |
1014 | return; |
1015 | } /* end of claw_timer */ | |
1016 | ||
1da177e4 LT |
1017 | /* |
1018 | * | |
1019 | * functions | |
1020 | */ | |
1021 | ||
1022 | ||
1023 | /*-------------------------------------------------------------------* | |
1024 | * * | |
1025 | * pages_to_order_of_mag * | |
1026 | * * | |
1027 | * takes a number of pages from 1 to 512 and returns the * | |
1028 | * log(num_pages)/log(2) get_free_pages() needs a base 2 order * | |
1029 | * of magnitude get_free_pages() has an upper order of 9 * | |
1030 | *--------------------------------------------------------------------*/ | |
1031 | ||
4d284cac | 1032 | static int |
1da177e4 LT |
1033 | pages_to_order_of_mag(int num_of_pages) |
1034 | { | |
1035 | int order_of_mag=1; /* assume 2 pages */ | |
b9d2fcee | 1036 | int nump; |
b805da74 AR |
1037 | |
1038 | CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages); | |
1da177e4 LT |
1039 | if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */ |
1040 | /* 512 pages = 2Meg on 4k page systems */ | |
1041 | if (num_of_pages >= 512) {return 9; } | |
1042 | /* we have two or more pages order is at least 1 */ | |
1043 | for (nump=2 ;nump <= 512;nump*=2) { | |
1044 | if (num_of_pages <= nump) | |
1045 | break; | |
1046 | order_of_mag +=1; | |
1047 | } | |
1048 | if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */ | |
b805da74 | 1049 | CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag); |
1da177e4 LT |
1050 | return order_of_mag; |
1051 | } | |
1052 | ||
1053 | /*-------------------------------------------------------------------* | |
1054 | * * | |
1055 | * add_claw_reads * | |
1056 | * * | |
1057 | *--------------------------------------------------------------------*/ | |
1058 | static int | |
1059 | add_claw_reads(struct net_device *dev, struct ccwbk* p_first, | |
1060 | struct ccwbk* p_last) | |
1061 | { | |
1062 | struct claw_privbk *privptr; | |
1063 | struct ccw1 temp_ccw; | |
1064 | struct endccw * p_end; | |
b805da74 | 1065 | CLAW_DBF_TEXT(4, trace, "addreads"); |
6951df34 | 1066 | privptr = dev->ml_priv; |
1da177e4 LT |
1067 | p_end = privptr->p_end_ccw; |
1068 | ||
1069 | /* first CCW and last CCW contains a new set of read channel programs | |
1070 | * to apend the running channel programs | |
1071 | */ | |
1072 | if ( p_first==NULL) { | |
b805da74 | 1073 | CLAW_DBF_TEXT(4, trace, "addexit"); |
1da177e4 LT |
1074 | return 0; |
1075 | } | |
1076 | ||
1077 | /* set up ending CCW sequence for this segment */ | |
1078 | if (p_end->read1) { | |
1079 | p_end->read1=0x00; /* second ending CCW is now active */ | |
1080 | /* reset ending CCWs and setup TIC CCWs */ | |
1081 | p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1082 | p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1083 | p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1); | |
1084 | p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1); | |
1085 | p_end->read2_nop2.cda=0; | |
1086 | p_end->read2_nop2.count=1; | |
1087 | } | |
1088 | else { | |
1089 | p_end->read1=0x01; /* first ending CCW is now active */ | |
1090 | /* reset ending CCWs and setup TIC CCWs */ | |
1091 | p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1092 | p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1093 | p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1); | |
1094 | p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1); | |
1095 | p_end->read1_nop2.cda=0; | |
1096 | p_end->read1_nop2.count=1; | |
1097 | } | |
1098 | ||
1099 | if ( privptr-> p_read_active_first ==NULL ) { | |
4811fcb7 AR |
1100 | privptr->p_read_active_first = p_first; /* set new first */ |
1101 | privptr->p_read_active_last = p_last; /* set new last */ | |
1da177e4 LT |
1102 | } |
1103 | else { | |
1104 | ||
1da177e4 LT |
1105 | /* set up TIC ccw */ |
1106 | temp_ccw.cda= (__u32)__pa(&p_first->read); | |
1107 | temp_ccw.count=0; | |
1108 | temp_ccw.flags=0; | |
1109 | temp_ccw.cmd_code = CCW_CLAW_CMD_TIC; | |
1110 | ||
1111 | ||
1112 | if (p_end->read1) { | |
1113 | ||
1114 | /* first set of CCW's is chained to the new read */ | |
1115 | /* chain, so the second set is chained to the active chain. */ | |
1116 | /* Therefore modify the second set to point to the new */ | |
1117 | /* read chain set up TIC CCWs */ | |
1118 | /* make sure we update the CCW so channel doesn't fetch it */ | |
1119 | /* when it's only half done */ | |
1120 | memcpy( &p_end->read2_nop2, &temp_ccw , | |
1121 | sizeof(struct ccw1)); | |
1122 | privptr->p_read_active_last->r_TIC_1.cda= | |
1123 | (__u32)__pa(&p_first->read); | |
1124 | privptr->p_read_active_last->r_TIC_2.cda= | |
1125 | (__u32)__pa(&p_first->read); | |
1126 | } | |
1127 | else { | |
1128 | /* make sure we update the CCW so channel doesn't */ | |
1129 | /* fetch it when it is only half done */ | |
1130 | memcpy( &p_end->read1_nop2, &temp_ccw , | |
1131 | sizeof(struct ccw1)); | |
1132 | privptr->p_read_active_last->r_TIC_1.cda= | |
1133 | (__u32)__pa(&p_first->read); | |
1134 | privptr->p_read_active_last->r_TIC_2.cda= | |
1135 | (__u32)__pa(&p_first->read); | |
1136 | } | |
4811fcb7 | 1137 | /* chain in new set of blocks */ |
1da177e4 LT |
1138 | privptr->p_read_active_last->next = p_first; |
1139 | privptr->p_read_active_last=p_last; | |
1140 | } /* end of if ( privptr-> p_read_active_first ==NULL) */ | |
b805da74 | 1141 | CLAW_DBF_TEXT(4, trace, "addexit"); |
1da177e4 LT |
1142 | return 0; |
1143 | } /* end of add_claw_reads */ | |
1144 | ||
1145 | /*-------------------------------------------------------------------* | |
1146 | * ccw_check_return_code * | |
1147 | * * | |
1148 | *-------------------------------------------------------------------*/ | |
1149 | ||
4d284cac | 1150 | static void |
1da177e4 LT |
1151 | ccw_check_return_code(struct ccw_device *cdev, int return_code) |
1152 | { | |
b805da74 | 1153 | CLAW_DBF_TEXT(4, trace, "ccwret"); |
1da177e4 LT |
1154 | if (return_code != 0) { |
1155 | switch (return_code) { | |
b805da74 AR |
1156 | case -EBUSY: /* BUSY is a transient state no action needed */ |
1157 | break; | |
1158 | case -ENODEV: | |
4811fcb7 AR |
1159 | dev_err(&cdev->dev, "The remote channel adapter is not" |
1160 | " available\n"); | |
b805da74 AR |
1161 | break; |
1162 | case -EINVAL: | |
4811fcb7 AR |
1163 | dev_err(&cdev->dev, |
1164 | "The status of the remote channel adapter" | |
1165 | " is not valid\n"); | |
b805da74 AR |
1166 | break; |
1167 | default: | |
4811fcb7 AR |
1168 | dev_err(&cdev->dev, "The common device layer" |
1169 | " returned error code %d\n", | |
1170 | return_code); | |
b805da74 AR |
1171 | } |
1172 | } | |
1173 | CLAW_DBF_TEXT(4, trace, "ccwret"); | |
1da177e4 LT |
1174 | } /* end of ccw_check_return_code */ |
1175 | ||
1176 | /*-------------------------------------------------------------------* | |
1177 | * ccw_check_unit_check * | |
1178 | *--------------------------------------------------------------------*/ | |
1179 | ||
4d284cac | 1180 | static void |
1da177e4 LT |
1181 | ccw_check_unit_check(struct chbk * p_ch, unsigned char sense ) |
1182 | { | |
b805da74 | 1183 | struct net_device *ndev = p_ch->ndev; |
4811fcb7 | 1184 | struct device *dev = &p_ch->cdev->dev; |
1da177e4 | 1185 | |
b805da74 | 1186 | CLAW_DBF_TEXT(4, trace, "unitchek"); |
4811fcb7 AR |
1187 | dev_warn(dev, "The communication peer of %s disconnected\n", |
1188 | ndev->name); | |
1da177e4 | 1189 | |
b9d2fcee AR |
1190 | if (sense & 0x40) { |
1191 | if (sense & 0x01) { | |
4811fcb7 AR |
1192 | dev_warn(dev, "The remote channel adapter for" |
1193 | " %s has been reset\n", | |
1194 | ndev->name); | |
b9d2fcee AR |
1195 | } |
1196 | } else if (sense & 0x20) { | |
1197 | if (sense & 0x04) { | |
4811fcb7 AR |
1198 | dev_warn(dev, "A data streaming timeout occurred" |
1199 | " for %s\n", | |
1200 | ndev->name); | |
b9d2fcee | 1201 | } else if (sense & 0x10) { |
4811fcb7 AR |
1202 | dev_warn(dev, "The remote channel adapter for %s" |
1203 | " is faulty\n", | |
1204 | ndev->name); | |
b9d2fcee AR |
1205 | } else { |
1206 | dev_warn(dev, "A data transfer parity error occurred" | |
4811fcb7 AR |
1207 | " for %s\n", |
1208 | ndev->name); | |
b9d2fcee AR |
1209 | } |
1210 | } else if (sense & 0x10) { | |
1211 | dev_warn(dev, "A read data parity error occurred" | |
1212 | " for %s\n", | |
1213 | ndev->name); | |
1214 | } | |
1da177e4 | 1215 | |
1da177e4 LT |
1216 | } /* end of ccw_check_unit_check */ |
1217 | ||
1da177e4 LT |
1218 | /*-------------------------------------------------------------------* |
1219 | * find_link * | |
1220 | *--------------------------------------------------------------------*/ | |
1221 | static int | |
1222 | find_link(struct net_device *dev, char *host_name, char *ws_name ) | |
1223 | { | |
1224 | struct claw_privbk *privptr; | |
1225 | struct claw_env *p_env; | |
1226 | int rc=0; | |
1227 | ||
b805da74 | 1228 | CLAW_DBF_TEXT(2, setup, "findlink"); |
6951df34 | 1229 | privptr = dev->ml_priv; |
1da177e4 LT |
1230 | p_env=privptr->p_env; |
1231 | switch (p_env->packing) | |
1232 | { | |
1233 | case PACKING_ASK: | |
1234 | if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) || | |
1235 | (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 )) | |
1236 | rc = EINVAL; | |
1237 | break; | |
1238 | case DO_PACKED: | |
1239 | case PACK_SEND: | |
1240 | if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) || | |
1241 | (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 )) | |
1242 | rc = EINVAL; | |
1243 | break; | |
1244 | default: | |
1245 | if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) || | |
1246 | (memcmp(p_env->api_type , ws_name, 8)!=0)) | |
1247 | rc = EINVAL; | |
1248 | break; | |
1249 | } | |
1250 | ||
b9d2fcee | 1251 | return rc; |
1da177e4 LT |
1252 | } /* end of find_link */ |
1253 | ||
1254 | /*-------------------------------------------------------------------* | |
1255 | * claw_hw_tx * | |
1256 | * * | |
1257 | * * | |
1258 | *-------------------------------------------------------------------*/ | |
1259 | ||
1260 | static int | |
1261 | claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid) | |
1262 | { | |
1263 | int rc=0; | |
1264 | struct claw_privbk *privptr; | |
1265 | struct ccwbk *p_this_ccw; | |
1266 | struct ccwbk *p_first_ccw; | |
1267 | struct ccwbk *p_last_ccw; | |
1268 | __u32 numBuffers; | |
1269 | signed long len_of_data; | |
1270 | unsigned long bytesInThisBuffer; | |
1271 | unsigned char *pDataAddress; | |
1272 | struct endccw *pEnd; | |
1273 | struct ccw1 tempCCW; | |
1274 | struct chbk *p_ch; | |
1275 | struct claw_env *p_env; | |
1276 | int lock; | |
1277 | struct clawph *pk_head; | |
1278 | struct chbk *ch; | |
b805da74 AR |
1279 | |
1280 | CLAW_DBF_TEXT(4, trace, "hw_tx"); | |
6951df34 | 1281 | privptr = (struct claw_privbk *)(dev->ml_priv); |
1da177e4 LT |
1282 | p_ch=(struct chbk *)&privptr->channel[WRITE]; |
1283 | p_env =privptr->p_env; | |
1da177e4 LT |
1284 | claw_free_wrt_buf(dev); /* Clean up free chain if posible */ |
1285 | /* scan the write queue to free any completed write packets */ | |
1286 | p_first_ccw=NULL; | |
1287 | p_last_ccw=NULL; | |
1288 | if ((p_env->packing >= PACK_SEND) && | |
1289 | (skb->cb[1] != 'P')) { | |
1290 | skb_push(skb,sizeof(struct clawph)); | |
1291 | pk_head=(struct clawph *)skb->data; | |
1292 | pk_head->len=skb->len-sizeof(struct clawph); | |
1293 | if (pk_head->len%4) { | |
1294 | pk_head->len+= 4-(pk_head->len%4); | |
1295 | skb_pad(skb,4-(pk_head->len%4)); | |
1296 | skb_put(skb,4-(pk_head->len%4)); | |
1297 | } | |
1298 | if (p_env->packing == DO_PACKED) | |
1299 | pk_head->link_num = linkid; | |
1300 | else | |
1301 | pk_head->link_num = 0; | |
1302 | pk_head->flag = 0x00; | |
1303 | skb_pad(skb,4); | |
1304 | skb->cb[1] = 'P'; | |
1305 | } | |
1306 | if (linkid == 0) { | |
1307 | if (claw_check_busy(dev)) { | |
1308 | if (privptr->write_free_count!=0) { | |
1309 | claw_clear_busy(dev); | |
1310 | } | |
1311 | else { | |
1312 | claw_strt_out_IO(dev ); | |
1313 | claw_free_wrt_buf( dev ); | |
1314 | if (privptr->write_free_count==0) { | |
1da177e4 LT |
1315 | ch = &privptr->channel[WRITE]; |
1316 | atomic_inc(&skb->users); | |
1317 | skb_queue_tail(&ch->collect_queue, skb); | |
1318 | goto Done; | |
1319 | } | |
1320 | else { | |
1321 | claw_clear_busy(dev); | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | /* tx lock */ | |
1326 | if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */ | |
1da177e4 LT |
1327 | ch = &privptr->channel[WRITE]; |
1328 | atomic_inc(&skb->users); | |
1329 | skb_queue_tail(&ch->collect_queue, skb); | |
1330 | claw_strt_out_IO(dev ); | |
1331 | rc=-EBUSY; | |
1332 | goto Done2; | |
1333 | } | |
1334 | } | |
1335 | /* See how many write buffers are required to hold this data */ | |
f5154fbf | 1336 | numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size); |
1da177e4 LT |
1337 | |
1338 | /* If that number of buffers isn't available, give up for now */ | |
1339 | if (privptr->write_free_count < numBuffers || | |
1340 | privptr->p_write_free_chain == NULL ) { | |
1341 | ||
1342 | claw_setbit_busy(TB_NOBUFFER,dev); | |
1da177e4 LT |
1343 | ch = &privptr->channel[WRITE]; |
1344 | atomic_inc(&skb->users); | |
1345 | skb_queue_tail(&ch->collect_queue, skb); | |
b805da74 | 1346 | CLAW_DBF_TEXT(2, trace, "clawbusy"); |
1da177e4 LT |
1347 | goto Done2; |
1348 | } | |
1349 | pDataAddress=skb->data; | |
1350 | len_of_data=skb->len; | |
1351 | ||
1352 | while (len_of_data > 0) { | |
1da177e4 LT |
1353 | p_this_ccw=privptr->p_write_free_chain; /* get a block */ |
1354 | if (p_this_ccw == NULL) { /* lost the race */ | |
1355 | ch = &privptr->channel[WRITE]; | |
1356 | atomic_inc(&skb->users); | |
1357 | skb_queue_tail(&ch->collect_queue, skb); | |
1358 | goto Done2; | |
1359 | } | |
1360 | privptr->p_write_free_chain=p_this_ccw->next; | |
1361 | p_this_ccw->next=NULL; | |
1362 | --privptr->write_free_count; /* -1 */ | |
b9d2fcee AR |
1363 | if (len_of_data >= privptr->p_env->write_size) |
1364 | bytesInThisBuffer = privptr->p_env->write_size; | |
1365 | else | |
1366 | bytesInThisBuffer = len_of_data; | |
1da177e4 LT |
1367 | memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer); |
1368 | len_of_data-=bytesInThisBuffer; | |
1369 | pDataAddress+=(unsigned long)bytesInThisBuffer; | |
1370 | /* setup write CCW */ | |
1371 | p_this_ccw->write.cmd_code = (linkid * 8) +1; | |
1372 | if (len_of_data>0) { | |
1373 | p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG; | |
1374 | } | |
1375 | p_this_ccw->write.count=bytesInThisBuffer; | |
1376 | /* now add to end of this chain */ | |
1377 | if (p_first_ccw==NULL) { | |
1378 | p_first_ccw=p_this_ccw; | |
1379 | } | |
1380 | if (p_last_ccw!=NULL) { | |
1381 | p_last_ccw->next=p_this_ccw; | |
1382 | /* set up TIC ccws */ | |
1383 | p_last_ccw->w_TIC_1.cda= | |
1384 | (__u32)__pa(&p_this_ccw->write); | |
1385 | } | |
1386 | p_last_ccw=p_this_ccw; /* save new last block */ | |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | /* FirstCCW and LastCCW now contain a new set of write channel | |
1390 | * programs to append to the running channel program | |
1391 | */ | |
1392 | ||
1393 | if (p_first_ccw!=NULL) { | |
4811fcb7 | 1394 | /* setup ending ccw sequence for this segment */ |
1da177e4 LT |
1395 | pEnd=privptr->p_end_ccw; |
1396 | if (pEnd->write1) { | |
1397 | pEnd->write1=0x00; /* second end ccw is now active */ | |
1398 | /* set up Tic CCWs */ | |
1399 | p_last_ccw->w_TIC_1.cda= | |
1400 | (__u32)__pa(&pEnd->write2_nop1); | |
1401 | pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1402 | pEnd->write2_nop2.flags = | |
1403 | CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1404 | pEnd->write2_nop2.cda=0; | |
1405 | pEnd->write2_nop2.count=1; | |
1406 | } | |
1407 | else { /* end of if (pEnd->write1)*/ | |
1408 | pEnd->write1=0x01; /* first end ccw is now active */ | |
1409 | /* set up Tic CCWs */ | |
1410 | p_last_ccw->w_TIC_1.cda= | |
1411 | (__u32)__pa(&pEnd->write1_nop1); | |
1412 | pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1413 | pEnd->write1_nop2.flags = | |
1414 | CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1415 | pEnd->write1_nop2.cda=0; | |
1416 | pEnd->write1_nop2.count=1; | |
1417 | } /* end if if (pEnd->write1) */ | |
1418 | ||
1da177e4 LT |
1419 | if (privptr->p_write_active_first==NULL ) { |
1420 | privptr->p_write_active_first=p_first_ccw; | |
1421 | privptr->p_write_active_last=p_last_ccw; | |
1422 | } | |
1423 | else { | |
1da177e4 LT |
1424 | /* set up Tic CCWs */ |
1425 | ||
1426 | tempCCW.cda=(__u32)__pa(&p_first_ccw->write); | |
1427 | tempCCW.count=0; | |
1428 | tempCCW.flags=0; | |
1429 | tempCCW.cmd_code=CCW_CLAW_CMD_TIC; | |
1430 | ||
1431 | if (pEnd->write1) { | |
1432 | ||
1433 | /* | |
1434 | * first set of ending CCW's is chained to the new write | |
1435 | * chain, so the second set is chained to the active chain | |
1436 | * Therefore modify the second set to point the new write chain. | |
1437 | * make sure we update the CCW atomically | |
1438 | * so channel does not fetch it when it's only half done | |
1439 | */ | |
1440 | memcpy( &pEnd->write2_nop2, &tempCCW , | |
1441 | sizeof(struct ccw1)); | |
1442 | privptr->p_write_active_last->w_TIC_1.cda= | |
1443 | (__u32)__pa(&p_first_ccw->write); | |
1444 | } | |
1445 | else { | |
1446 | ||
1447 | /*make sure we update the CCW atomically | |
1448 | *so channel does not fetch it when it's only half done | |
1449 | */ | |
1450 | memcpy(&pEnd->write1_nop2, &tempCCW , | |
1451 | sizeof(struct ccw1)); | |
1452 | privptr->p_write_active_last->w_TIC_1.cda= | |
1453 | (__u32)__pa(&p_first_ccw->write); | |
1454 | ||
1455 | } /* end if if (pEnd->write1) */ | |
1456 | ||
1457 | privptr->p_write_active_last->next=p_first_ccw; | |
1458 | privptr->p_write_active_last=p_last_ccw; | |
1459 | } | |
1460 | ||
1461 | } /* endif (p_first_ccw!=NULL) */ | |
8e84c801 | 1462 | dev_kfree_skb_any(skb); |
1da177e4 LT |
1463 | if (linkid==0) { |
1464 | lock=LOCK_NO; | |
1465 | } | |
1466 | else { | |
1467 | lock=LOCK_YES; | |
1468 | } | |
1469 | claw_strt_out_IO(dev ); | |
1470 | /* if write free count is zero , set NOBUFFER */ | |
1da177e4 LT |
1471 | if (privptr->write_free_count==0) { |
1472 | claw_setbit_busy(TB_NOBUFFER,dev); | |
1473 | } | |
1474 | Done2: | |
1475 | claw_clearbit_busy(TB_TX,dev); | |
1476 | Done: | |
1da177e4 LT |
1477 | return(rc); |
1478 | } /* end of claw_hw_tx */ | |
1479 | ||
1480 | /*-------------------------------------------------------------------* | |
1481 | * * | |
1482 | * init_ccw_bk * | |
1483 | * * | |
1484 | *--------------------------------------------------------------------*/ | |
1485 | ||
1486 | static int | |
1487 | init_ccw_bk(struct net_device *dev) | |
1488 | { | |
1489 | ||
1490 | __u32 ccw_blocks_required; | |
1491 | __u32 ccw_blocks_perpage; | |
1492 | __u32 ccw_pages_required; | |
1493 | __u32 claw_reads_perpage=1; | |
1494 | __u32 claw_read_pages; | |
1495 | __u32 claw_writes_perpage=1; | |
1496 | __u32 claw_write_pages; | |
1497 | void *p_buff=NULL; | |
1498 | struct ccwbk*p_free_chain; | |
1499 | struct ccwbk*p_buf; | |
1500 | struct ccwbk*p_last_CCWB; | |
1501 | struct ccwbk*p_first_CCWB; | |
1502 | struct endccw *p_endccw=NULL; | |
6951df34 PT |
1503 | addr_t real_address; |
1504 | struct claw_privbk *privptr = dev->ml_priv; | |
1da177e4 LT |
1505 | struct clawh *pClawH=NULL; |
1506 | addr_t real_TIC_address; | |
1507 | int i,j; | |
b805da74 | 1508 | CLAW_DBF_TEXT(4, trace, "init_ccw"); |
1da177e4 LT |
1509 | |
1510 | /* initialize statistics field */ | |
1511 | privptr->active_link_ID=0; | |
1512 | /* initialize ccwbk pointers */ | |
1513 | privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/ | |
1514 | privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/ | |
1515 | privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/ | |
1516 | privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/ | |
1517 | privptr->p_read_active_last=NULL; /* pointer to the last read ccw */ | |
1518 | privptr->p_end_ccw=NULL; /* pointer to ending ccw */ | |
1519 | privptr->p_claw_signal_blk=NULL; /* pointer to signal block */ | |
1520 | privptr->buffs_alloc = 0; | |
1521 | memset(&privptr->end_ccw, 0x00, sizeof(struct endccw)); | |
1522 | memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl)); | |
1523 | /* initialize free write ccwbk counter */ | |
1524 | privptr->write_free_count=0; /* number of free bufs on write chain */ | |
1525 | p_last_CCWB = NULL; | |
1526 | p_first_CCWB= NULL; | |
1527 | /* | |
1528 | * We need 1 CCW block for each read buffer, 1 for each | |
1529 | * write buffer, plus 1 for ClawSignalBlock | |
1530 | */ | |
1531 | ccw_blocks_required = | |
1532 | privptr->p_env->read_buffers+privptr->p_env->write_buffers+1; | |
1da177e4 LT |
1533 | /* |
1534 | * compute number of CCW blocks that will fit in a page | |
1535 | */ | |
1536 | ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE; | |
1537 | ccw_pages_required= | |
f5154fbf | 1538 | DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage); |
1da177e4 | 1539 | |
1da177e4 LT |
1540 | /* |
1541 | * read and write sizes are set by 2 constants in claw.h | |
1542 | * 4k and 32k. Unpacked values other than 4k are not going to | |
1543 | * provide good performance. With packing buffers support 32k | |
1544 | * buffers are used. | |
1545 | */ | |
f5154fbf JL |
1546 | if (privptr->p_env->read_size < PAGE_SIZE) { |
1547 | claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size; | |
1548 | claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers, | |
1549 | claw_reads_perpage); | |
1da177e4 LT |
1550 | } |
1551 | else { /* > or equal */ | |
f5154fbf JL |
1552 | privptr->p_buff_pages_perread = |
1553 | DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); | |
1554 | claw_read_pages = privptr->p_env->read_buffers * | |
1555 | privptr->p_buff_pages_perread; | |
1da177e4 LT |
1556 | } |
1557 | if (privptr->p_env->write_size < PAGE_SIZE) { | |
f5154fbf JL |
1558 | claw_writes_perpage = |
1559 | PAGE_SIZE / privptr->p_env->write_size; | |
1560 | claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers, | |
1561 | claw_writes_perpage); | |
1da177e4 LT |
1562 | |
1563 | } | |
1564 | else { /* > or equal */ | |
f5154fbf JL |
1565 | privptr->p_buff_pages_perwrite = |
1566 | DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); | |
1567 | claw_write_pages = privptr->p_env->write_buffers * | |
1568 | privptr->p_buff_pages_perwrite; | |
1da177e4 | 1569 | } |
1da177e4 LT |
1570 | /* |
1571 | * allocate ccw_pages_required | |
1572 | */ | |
1573 | if (privptr->p_buff_ccw==NULL) { | |
1574 | privptr->p_buff_ccw= | |
1575 | (void *)__get_free_pages(__GFP_DMA, | |
1576 | (int)pages_to_order_of_mag(ccw_pages_required )); | |
1577 | if (privptr->p_buff_ccw==NULL) { | |
1da177e4 LT |
1578 | return -ENOMEM; |
1579 | } | |
1580 | privptr->p_buff_ccw_num=ccw_pages_required; | |
1581 | } | |
1582 | memset(privptr->p_buff_ccw, 0x00, | |
1583 | privptr->p_buff_ccw_num * PAGE_SIZE); | |
1584 | ||
1585 | /* | |
1586 | * obtain ending ccw block address | |
1587 | * | |
1588 | */ | |
1589 | privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw; | |
1590 | real_address = (__u32)__pa(privptr->p_end_ccw); | |
1591 | /* Initialize ending CCW block */ | |
1da177e4 LT |
1592 | p_endccw=privptr->p_end_ccw; |
1593 | p_endccw->real=real_address; | |
1594 | p_endccw->write1=0x00; | |
1595 | p_endccw->read1=0x00; | |
1596 | ||
1597 | /* write1_nop1 */ | |
1598 | p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1599 | p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1600 | p_endccw->write1_nop1.count = 1; | |
1601 | p_endccw->write1_nop1.cda = 0; | |
1602 | ||
1603 | /* write1_nop2 */ | |
1604 | p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1605 | p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1606 | p_endccw->write1_nop2.count = 1; | |
1607 | p_endccw->write1_nop2.cda = 0; | |
1608 | ||
1609 | /* write2_nop1 */ | |
1610 | p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1611 | p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1612 | p_endccw->write2_nop1.count = 1; | |
1613 | p_endccw->write2_nop1.cda = 0; | |
1614 | ||
1615 | /* write2_nop2 */ | |
1616 | p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1617 | p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1618 | p_endccw->write2_nop2.count = 1; | |
1619 | p_endccw->write2_nop2.cda = 0; | |
1620 | ||
1621 | /* read1_nop1 */ | |
1622 | p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1623 | p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1624 | p_endccw->read1_nop1.count = 1; | |
1625 | p_endccw->read1_nop1.cda = 0; | |
1626 | ||
1627 | /* read1_nop2 */ | |
1628 | p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1629 | p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1630 | p_endccw->read1_nop2.count = 1; | |
1631 | p_endccw->read1_nop2.cda = 0; | |
1632 | ||
1633 | /* read2_nop1 */ | |
1634 | p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1635 | p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1636 | p_endccw->read2_nop1.count = 1; | |
1637 | p_endccw->read2_nop1.cda = 0; | |
1638 | ||
1639 | /* read2_nop2 */ | |
1640 | p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1641 | p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1642 | p_endccw->read2_nop2.count = 1; | |
1643 | p_endccw->read2_nop2.cda = 0; | |
1644 | ||
1da177e4 LT |
1645 | /* |
1646 | * Build a chain of CCWs | |
1647 | * | |
1648 | */ | |
1da177e4 LT |
1649 | p_buff=privptr->p_buff_ccw; |
1650 | ||
1651 | p_free_chain=NULL; | |
1652 | for (i=0 ; i < ccw_pages_required; i++ ) { | |
1653 | real_address = (__u32)__pa(p_buff); | |
1654 | p_buf=p_buff; | |
1655 | for (j=0 ; j < ccw_blocks_perpage ; j++) { | |
1656 | p_buf->next = p_free_chain; | |
1657 | p_free_chain = p_buf; | |
1658 | p_buf->real=(__u32)__pa(p_buf); | |
1659 | ++p_buf; | |
1660 | } | |
1661 | p_buff+=PAGE_SIZE; | |
1662 | } | |
1da177e4 LT |
1663 | /* |
1664 | * Initialize ClawSignalBlock | |
1665 | * | |
1666 | */ | |
1da177e4 LT |
1667 | if (privptr->p_claw_signal_blk==NULL) { |
1668 | privptr->p_claw_signal_blk=p_free_chain; | |
1669 | p_free_chain=p_free_chain->next; | |
1670 | pClawH=(struct clawh *)privptr->p_claw_signal_blk; | |
1671 | pClawH->length=0xffff; | |
1672 | pClawH->opcode=0xff; | |
1673 | pClawH->flag=CLAW_BUSY; | |
1674 | } | |
1da177e4 LT |
1675 | |
1676 | /* | |
1677 | * allocate write_pages_required and add to free chain | |
1678 | */ | |
1679 | if (privptr->p_buff_write==NULL) { | |
1680 | if (privptr->p_env->write_size < PAGE_SIZE) { | |
1681 | privptr->p_buff_write= | |
1682 | (void *)__get_free_pages(__GFP_DMA, | |
1683 | (int)pages_to_order_of_mag(claw_write_pages )); | |
1684 | if (privptr->p_buff_write==NULL) { | |
1da177e4 | 1685 | privptr->p_buff_ccw=NULL; |
1da177e4 LT |
1686 | return -ENOMEM; |
1687 | } | |
1688 | /* | |
1689 | * Build CLAW write free chain | |
1690 | * | |
1691 | */ | |
1692 | ||
1693 | memset(privptr->p_buff_write, 0x00, | |
1694 | ccw_pages_required * PAGE_SIZE); | |
1da177e4 LT |
1695 | privptr->p_write_free_chain=NULL; |
1696 | ||
1697 | p_buff=privptr->p_buff_write; | |
1698 | ||
1699 | for (i=0 ; i< privptr->p_env->write_buffers ; i++) { | |
1700 | p_buf = p_free_chain; /* get a CCW */ | |
1701 | p_free_chain = p_buf->next; | |
1702 | p_buf->next =privptr->p_write_free_chain; | |
1703 | privptr->p_write_free_chain = p_buf; | |
1704 | p_buf-> p_buffer = (struct clawbuf *)p_buff; | |
1705 | p_buf-> write.cda = (__u32)__pa(p_buff); | |
1706 | p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1707 | p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1708 | p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1709 | p_buf-> w_read_FF.count = 1; | |
1710 | p_buf-> w_read_FF.cda = | |
1711 | (__u32)__pa(&p_buf-> header.flag); | |
1712 | p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1713 | p_buf-> w_TIC_1.flags = 0; | |
1714 | p_buf-> w_TIC_1.count = 0; | |
1715 | ||
4811fcb7 AR |
1716 | if (((unsigned long)p_buff + |
1717 | privptr->p_env->write_size) >= | |
1da177e4 | 1718 | ((unsigned long)(p_buff+2* |
4811fcb7 AR |
1719 | (privptr->p_env->write_size) - 1) & PAGE_MASK)) { |
1720 | p_buff = p_buff+privptr->p_env->write_size; | |
1da177e4 LT |
1721 | } |
1722 | } | |
1723 | } | |
1724 | else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */ | |
1725 | { | |
1726 | privptr->p_write_free_chain=NULL; | |
1727 | for (i = 0; i< privptr->p_env->write_buffers ; i++) { | |
1728 | p_buff=(void *)__get_free_pages(__GFP_DMA, | |
1729 | (int)pages_to_order_of_mag( | |
1730 | privptr->p_buff_pages_perwrite) ); | |
1da177e4 | 1731 | if (p_buff==NULL) { |
1da177e4 LT |
1732 | free_pages((unsigned long)privptr->p_buff_ccw, |
1733 | (int)pages_to_order_of_mag( | |
1734 | privptr->p_buff_ccw_num)); | |
1735 | privptr->p_buff_ccw=NULL; | |
1736 | p_buf=privptr->p_buff_write; | |
1737 | while (p_buf!=NULL) { | |
1738 | free_pages((unsigned long) | |
1739 | p_buf->p_buffer, | |
1740 | (int)pages_to_order_of_mag( | |
1741 | privptr->p_buff_pages_perwrite)); | |
1742 | p_buf=p_buf->next; | |
1743 | } | |
1da177e4 LT |
1744 | return -ENOMEM; |
1745 | } /* Error on get_pages */ | |
1746 | memset(p_buff, 0x00, privptr->p_env->write_size ); | |
1747 | p_buf = p_free_chain; | |
1748 | p_free_chain = p_buf->next; | |
1749 | p_buf->next = privptr->p_write_free_chain; | |
1750 | privptr->p_write_free_chain = p_buf; | |
1751 | privptr->p_buff_write = p_buf; | |
1752 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1753 | p_buf-> write.cda = (__u32)__pa(p_buff); | |
1754 | p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1755 | p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1756 | p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1757 | p_buf-> w_read_FF.count = 1; | |
1758 | p_buf-> w_read_FF.cda = | |
1759 | (__u32)__pa(&p_buf-> header.flag); | |
1760 | p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1761 | p_buf-> w_TIC_1.flags = 0; | |
1762 | p_buf-> w_TIC_1.count = 0; | |
1763 | } /* for all write_buffers */ | |
1764 | ||
1765 | } /* else buffers are PAGE_SIZE or bigger */ | |
1766 | ||
1767 | } | |
1768 | privptr->p_buff_write_num=claw_write_pages; | |
1769 | privptr->write_free_count=privptr->p_env->write_buffers; | |
1770 | ||
1771 | ||
1da177e4 LT |
1772 | /* |
1773 | * allocate read_pages_required and chain to free chain | |
1774 | */ | |
1775 | if (privptr->p_buff_read==NULL) { | |
1776 | if (privptr->p_env->read_size < PAGE_SIZE) { | |
1777 | privptr->p_buff_read= | |
1778 | (void *)__get_free_pages(__GFP_DMA, | |
1779 | (int)pages_to_order_of_mag(claw_read_pages) ); | |
1780 | if (privptr->p_buff_read==NULL) { | |
1da177e4 LT |
1781 | free_pages((unsigned long)privptr->p_buff_ccw, |
1782 | (int)pages_to_order_of_mag( | |
1783 | privptr->p_buff_ccw_num)); | |
1784 | /* free the write pages size is < page size */ | |
1785 | free_pages((unsigned long)privptr->p_buff_write, | |
1786 | (int)pages_to_order_of_mag( | |
1787 | privptr->p_buff_write_num)); | |
1788 | privptr->p_buff_ccw=NULL; | |
1789 | privptr->p_buff_write=NULL; | |
1da177e4 LT |
1790 | return -ENOMEM; |
1791 | } | |
1792 | memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE); | |
1793 | privptr->p_buff_read_num=claw_read_pages; | |
1794 | /* | |
1795 | * Build CLAW read free chain | |
1796 | * | |
1797 | */ | |
1da177e4 LT |
1798 | p_buff=privptr->p_buff_read; |
1799 | for (i=0 ; i< privptr->p_env->read_buffers ; i++) { | |
1800 | p_buf = p_free_chain; | |
1801 | p_free_chain = p_buf->next; | |
1802 | ||
1803 | if (p_last_CCWB==NULL) { | |
1804 | p_buf->next=NULL; | |
1805 | real_TIC_address=0; | |
1806 | p_last_CCWB=p_buf; | |
1807 | } | |
1808 | else { | |
1809 | p_buf->next=p_first_CCWB; | |
1810 | real_TIC_address= | |
1811 | (__u32)__pa(&p_first_CCWB -> read ); | |
1812 | } | |
1813 | ||
1814 | p_first_CCWB=p_buf; | |
1815 | ||
1816 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1817 | /* initialize read command */ | |
1818 | p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; | |
1819 | p_buf-> read.cda = (__u32)__pa(p_buff); | |
1820 | p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1821 | p_buf-> read.count = privptr->p_env->read_size; | |
1822 | ||
1823 | /* initialize read_h command */ | |
1824 | p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; | |
1825 | p_buf-> read_h.cda = | |
1826 | (__u32)__pa(&(p_buf->header)); | |
1827 | p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1828 | p_buf-> read_h.count = sizeof(struct clawh); | |
1829 | ||
1830 | /* initialize Signal command */ | |
1831 | p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; | |
1832 | p_buf-> signal.cda = | |
1833 | (__u32)__pa(&(pClawH->flag)); | |
1834 | p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1835 | p_buf-> signal.count = 1; | |
1836 | ||
1837 | /* initialize r_TIC_1 command */ | |
1838 | p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1839 | p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; | |
1840 | p_buf-> r_TIC_1.flags = 0; | |
1841 | p_buf-> r_TIC_1.count = 0; | |
1842 | ||
1843 | /* initialize r_read_FF command */ | |
1844 | p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1845 | p_buf-> r_read_FF.cda = | |
1846 | (__u32)__pa(&(pClawH->flag)); | |
1847 | p_buf-> r_read_FF.flags = | |
1848 | CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; | |
1849 | p_buf-> r_read_FF.count = 1; | |
1850 | ||
1851 | /* initialize r_TIC_2 */ | |
1852 | memcpy(&p_buf->r_TIC_2, | |
1853 | &p_buf->r_TIC_1, sizeof(struct ccw1)); | |
1854 | ||
1855 | /* initialize Header */ | |
1856 | p_buf->header.length=0xffff; | |
1857 | p_buf->header.opcode=0xff; | |
1858 | p_buf->header.flag=CLAW_PENDING; | |
1859 | ||
4811fcb7 AR |
1860 | if (((unsigned long)p_buff+privptr->p_env->read_size) >= |
1861 | ((unsigned long)(p_buff+2*(privptr->p_env->read_size) | |
1862 | -1) | |
1863 | & PAGE_MASK)) { | |
1da177e4 LT |
1864 | p_buff= p_buff+privptr->p_env->read_size; |
1865 | } | |
1866 | else { | |
1867 | p_buff= | |
1868 | (void *)((unsigned long) | |
4811fcb7 | 1869 | (p_buff+2*(privptr->p_env->read_size)-1) |
1da177e4 LT |
1870 | & PAGE_MASK) ; |
1871 | } | |
1872 | } /* for read_buffers */ | |
1873 | } /* read_size < PAGE_SIZE */ | |
1874 | else { /* read Size >= PAGE_SIZE */ | |
1da177e4 LT |
1875 | for (i=0 ; i< privptr->p_env->read_buffers ; i++) { |
1876 | p_buff = (void *)__get_free_pages(__GFP_DMA, | |
4811fcb7 AR |
1877 | (int)pages_to_order_of_mag( |
1878 | privptr->p_buff_pages_perread)); | |
1da177e4 | 1879 | if (p_buff==NULL) { |
1da177e4 | 1880 | free_pages((unsigned long)privptr->p_buff_ccw, |
4811fcb7 AR |
1881 | (int)pages_to_order_of_mag(privptr-> |
1882 | p_buff_ccw_num)); | |
1da177e4 LT |
1883 | /* free the write pages */ |
1884 | p_buf=privptr->p_buff_write; | |
1885 | while (p_buf!=NULL) { | |
4811fcb7 AR |
1886 | free_pages( |
1887 | (unsigned long)p_buf->p_buffer, | |
1888 | (int)pages_to_order_of_mag( | |
1889 | privptr->p_buff_pages_perwrite)); | |
1da177e4 LT |
1890 | p_buf=p_buf->next; |
1891 | } | |
1892 | /* free any read pages already alloc */ | |
1893 | p_buf=privptr->p_buff_read; | |
1894 | while (p_buf!=NULL) { | |
4811fcb7 AR |
1895 | free_pages( |
1896 | (unsigned long)p_buf->p_buffer, | |
1897 | (int)pages_to_order_of_mag( | |
1898 | privptr->p_buff_pages_perread)); | |
1da177e4 LT |
1899 | p_buf=p_buf->next; |
1900 | } | |
1901 | privptr->p_buff_ccw=NULL; | |
1902 | privptr->p_buff_write=NULL; | |
1da177e4 LT |
1903 | return -ENOMEM; |
1904 | } | |
1905 | memset(p_buff, 0x00, privptr->p_env->read_size); | |
1906 | p_buf = p_free_chain; | |
1907 | privptr->p_buff_read = p_buf; | |
1908 | p_free_chain = p_buf->next; | |
1909 | ||
1910 | if (p_last_CCWB==NULL) { | |
1911 | p_buf->next=NULL; | |
1912 | real_TIC_address=0; | |
1913 | p_last_CCWB=p_buf; | |
1914 | } | |
1915 | else { | |
1916 | p_buf->next=p_first_CCWB; | |
1917 | real_TIC_address= | |
1918 | (addr_t)__pa( | |
1919 | &p_first_CCWB -> read ); | |
1920 | } | |
1921 | ||
1922 | p_first_CCWB=p_buf; | |
1923 | /* save buff address */ | |
1924 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1925 | /* initialize read command */ | |
1926 | p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; | |
1927 | p_buf-> read.cda = (__u32)__pa(p_buff); | |
1928 | p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1929 | p_buf-> read.count = privptr->p_env->read_size; | |
1930 | ||
1931 | /* initialize read_h command */ | |
1932 | p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; | |
1933 | p_buf-> read_h.cda = | |
1934 | (__u32)__pa(&(p_buf->header)); | |
1935 | p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1936 | p_buf-> read_h.count = sizeof(struct clawh); | |
1937 | ||
1938 | /* initialize Signal command */ | |
1939 | p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; | |
1940 | p_buf-> signal.cda = | |
1941 | (__u32)__pa(&(pClawH->flag)); | |
1942 | p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1943 | p_buf-> signal.count = 1; | |
1944 | ||
1945 | /* initialize r_TIC_1 command */ | |
1946 | p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1947 | p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; | |
1948 | p_buf-> r_TIC_1.flags = 0; | |
1949 | p_buf-> r_TIC_1.count = 0; | |
1950 | ||
1951 | /* initialize r_read_FF command */ | |
1952 | p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1953 | p_buf-> r_read_FF.cda = | |
1954 | (__u32)__pa(&(pClawH->flag)); | |
1955 | p_buf-> r_read_FF.flags = | |
1956 | CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; | |
1957 | p_buf-> r_read_FF.count = 1; | |
1958 | ||
1959 | /* initialize r_TIC_2 */ | |
1960 | memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1, | |
1961 | sizeof(struct ccw1)); | |
1962 | ||
1963 | /* initialize Header */ | |
1964 | p_buf->header.length=0xffff; | |
1965 | p_buf->header.opcode=0xff; | |
1966 | p_buf->header.flag=CLAW_PENDING; | |
1967 | ||
1968 | } /* For read_buffers */ | |
1969 | } /* read_size >= PAGE_SIZE */ | |
1970 | } /* pBuffread = NULL */ | |
1da177e4 LT |
1971 | add_claw_reads( dev ,p_first_CCWB , p_last_CCWB); |
1972 | privptr->buffs_alloc = 1; | |
b805da74 | 1973 | |
1da177e4 LT |
1974 | return 0; |
1975 | } /* end of init_ccw_bk */ | |
1976 | ||
1977 | /*-------------------------------------------------------------------* | |
1978 | * * | |
1979 | * probe_error * | |
1980 | * * | |
1981 | *--------------------------------------------------------------------*/ | |
1982 | ||
1983 | static void | |
1984 | probe_error( struct ccwgroup_device *cgdev) | |
1985 | { | |
2b356b46 | 1986 | struct claw_privbk *privptr; |
b805da74 AR |
1987 | |
1988 | CLAW_DBF_TEXT(4, trace, "proberr"); | |
dff59b64 | 1989 | privptr = dev_get_drvdata(&cgdev->dev); |
2b356b46 | 1990 | if (privptr != NULL) { |
dff59b64 | 1991 | dev_set_drvdata(&cgdev->dev, NULL); |
17fd682e | 1992 | kfree(privptr->p_env); |
2b356b46 MS |
1993 | kfree(privptr->p_mtc_envelope); |
1994 | kfree(privptr); | |
1995 | } | |
1da177e4 LT |
1996 | } /* probe_error */ |
1997 | ||
1da177e4 LT |
1998 | /*-------------------------------------------------------------------* |
1999 | * claw_process_control * | |
2000 | * * | |
2001 | * * | |
2002 | *--------------------------------------------------------------------*/ | |
2003 | ||
2004 | static int | |
2005 | claw_process_control( struct net_device *dev, struct ccwbk * p_ccw) | |
2006 | { | |
2007 | ||
2008 | struct clawbuf *p_buf; | |
2009 | struct clawctl ctlbk; | |
2010 | struct clawctl *p_ctlbk; | |
2011 | char temp_host_name[8]; | |
2012 | char temp_ws_name[8]; | |
2013 | struct claw_privbk *privptr; | |
2014 | struct claw_env *p_env; | |
2015 | struct sysval *p_sysval; | |
2016 | struct conncmd *p_connect=NULL; | |
2017 | int rc; | |
2018 | struct chbk *p_ch = NULL; | |
b805da74 AR |
2019 | struct device *tdev; |
2020 | CLAW_DBF_TEXT(2, setup, "clw_cntl"); | |
1da177e4 LT |
2021 | udelay(1000); /* Wait a ms for the control packets to |
2022 | *catch up to each other */ | |
6951df34 | 2023 | privptr = dev->ml_priv; |
1da177e4 | 2024 | p_env=privptr->p_env; |
b805da74 | 2025 | tdev = &privptr->channel[READ].cdev->dev; |
1da177e4 LT |
2026 | memcpy( &temp_host_name, p_env->host_name, 8); |
2027 | memcpy( &temp_ws_name, p_env->adapter_name , 8); | |
4811fcb7 | 2028 | dev_info(tdev, "%s: CLAW device %.8s: " |
1da177e4 LT |
2029 | "Received Control Packet\n", |
2030 | dev->name, temp_ws_name); | |
2031 | if (privptr->release_pend==1) { | |
1da177e4 LT |
2032 | return 0; |
2033 | } | |
2034 | p_buf=p_ccw->p_buffer; | |
2035 | p_ctlbk=&ctlbk; | |
2036 | if (p_env->packing == DO_PACKED) { /* packing in progress?*/ | |
2037 | memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl)); | |
2038 | } else { | |
2039 | memcpy(p_ctlbk, p_buf, sizeof(struct clawctl)); | |
2040 | } | |
1da177e4 LT |
2041 | switch (p_ctlbk->command) |
2042 | { | |
b805da74 AR |
2043 | case SYSTEM_VALIDATE_REQUEST: |
2044 | if (p_ctlbk->version != CLAW_VERSION_ID) { | |
2045 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2046 | CLAW_RC_WRONG_VERSION); | |
4811fcb7 AR |
2047 | dev_warn(tdev, "The communication peer of %s" |
2048 | " uses an incorrect API version %d\n", | |
2049 | dev->name, p_ctlbk->version); | |
b805da74 AR |
2050 | } |
2051 | p_sysval = (struct sysval *)&(p_ctlbk->data); | |
4811fcb7 AR |
2052 | dev_info(tdev, "%s: Recv Sys Validate Request: " |
2053 | "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s," | |
2054 | "Host name=%.8s\n", | |
2055 | dev->name, p_ctlbk->version, | |
2056 | p_ctlbk->linkid, | |
2057 | p_ctlbk->correlator, | |
2058 | p_sysval->WS_name, | |
2059 | p_sysval->host_name); | |
b805da74 AR |
2060 | if (memcmp(temp_host_name, p_sysval->host_name, 8)) { |
2061 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2062 | CLAW_RC_NAME_MISMATCH); | |
2063 | CLAW_DBF_TEXT(2, setup, "HSTBAD"); | |
2064 | CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name); | |
2065 | CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name); | |
4811fcb7 AR |
2066 | dev_warn(tdev, |
2067 | "Host name %s for %s does not match the" | |
2068 | " remote adapter name %s\n", | |
b805da74 | 2069 | p_sysval->host_name, |
4811fcb7 | 2070 | dev->name, |
b805da74 AR |
2071 | temp_host_name); |
2072 | } | |
2073 | if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) { | |
2074 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2075 | CLAW_RC_NAME_MISMATCH); | |
2076 | CLAW_DBF_TEXT(2, setup, "WSNBAD"); | |
2077 | CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name); | |
2078 | CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name); | |
4811fcb7 AR |
2079 | dev_warn(tdev, "Adapter name %s for %s does not match" |
2080 | " the remote host name %s\n", | |
2081 | p_sysval->WS_name, | |
2082 | dev->name, | |
2083 | temp_ws_name); | |
b805da74 AR |
2084 | } |
2085 | if ((p_sysval->write_frame_size < p_env->write_size) && | |
2086 | (p_env->packing == 0)) { | |
2087 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2088 | CLAW_RC_HOST_RCV_TOO_SMALL); | |
4811fcb7 AR |
2089 | dev_warn(tdev, |
2090 | "The local write buffer is smaller than the" | |
2091 | " remote read buffer\n"); | |
b805da74 AR |
2092 | CLAW_DBF_TEXT(2, setup, "wrtszbad"); |
2093 | } | |
2094 | if ((p_sysval->read_frame_size < p_env->read_size) && | |
2095 | (p_env->packing == 0)) { | |
2096 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2097 | CLAW_RC_HOST_RCV_TOO_SMALL); | |
4811fcb7 AR |
2098 | dev_warn(tdev, |
2099 | "The local read buffer is smaller than the" | |
2100 | " remote write buffer\n"); | |
b805da74 AR |
2101 | CLAW_DBF_TEXT(2, setup, "rdsizbad"); |
2102 | } | |
2103 | claw_snd_sys_validate_rsp(dev, p_ctlbk, 0); | |
4811fcb7 AR |
2104 | dev_info(tdev, |
2105 | "CLAW device %.8s: System validate" | |
2106 | " completed.\n", temp_ws_name); | |
2107 | dev_info(tdev, | |
2108 | "%s: sys Validate Rsize:%d Wsize:%d\n", | |
2109 | dev->name, p_sysval->read_frame_size, | |
2110 | p_sysval->write_frame_size); | |
b805da74 AR |
2111 | privptr->system_validate_comp = 1; |
2112 | if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0) | |
2113 | p_env->packing = PACKING_ASK; | |
2114 | claw_strt_conn_req(dev); | |
2115 | break; | |
2116 | case SYSTEM_VALIDATE_RESPONSE: | |
2117 | p_sysval = (struct sysval *)&(p_ctlbk->data); | |
4811fcb7 AR |
2118 | dev_info(tdev, |
2119 | "Settings for %s validated (version=%d, " | |
2120 | "remote device=%d, rc=%d, adapter name=%.8s, " | |
2121 | "host name=%.8s)\n", | |
b805da74 AR |
2122 | dev->name, |
2123 | p_ctlbk->version, | |
2124 | p_ctlbk->correlator, | |
2125 | p_ctlbk->rc, | |
2126 | p_sysval->WS_name, | |
2127 | p_sysval->host_name); | |
2128 | switch (p_ctlbk->rc) { | |
2129 | case 0: | |
4811fcb7 AR |
2130 | dev_info(tdev, "%s: CLAW device " |
2131 | "%.8s: System validate completed.\n", | |
2132 | dev->name, temp_ws_name); | |
b805da74 AR |
2133 | if (privptr->system_validate_comp == 0) |
2134 | claw_strt_conn_req(dev); | |
2135 | privptr->system_validate_comp = 1; | |
2136 | break; | |
2137 | case CLAW_RC_NAME_MISMATCH: | |
4811fcb7 AR |
2138 | dev_warn(tdev, "Validating %s failed because of" |
2139 | " a host or adapter name mismatch\n", | |
2140 | dev->name); | |
b805da74 AR |
2141 | break; |
2142 | case CLAW_RC_WRONG_VERSION: | |
4811fcb7 AR |
2143 | dev_warn(tdev, "Validating %s failed because of a" |
2144 | " version conflict\n", | |
b805da74 AR |
2145 | dev->name); |
2146 | break; | |
2147 | case CLAW_RC_HOST_RCV_TOO_SMALL: | |
4811fcb7 AR |
2148 | dev_warn(tdev, "Validating %s failed because of a" |
2149 | " frame size conflict\n", | |
b805da74 AR |
2150 | dev->name); |
2151 | break; | |
2152 | default: | |
4811fcb7 AR |
2153 | dev_warn(tdev, "The communication peer of %s rejected" |
2154 | " the connection\n", | |
2155 | dev->name); | |
b805da74 AR |
2156 | break; |
2157 | } | |
2158 | break; | |
1da177e4 | 2159 | |
b805da74 AR |
2160 | case CONNECTION_REQUEST: |
2161 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 | 2162 | dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d," |
b805da74 AR |
2163 | "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n", |
2164 | dev->name, | |
2165 | p_ctlbk->version, | |
2166 | p_ctlbk->linkid, | |
2167 | p_ctlbk->correlator, | |
2168 | p_connect->host_name, | |
2169 | p_connect->WS_name); | |
2170 | if (privptr->active_link_ID != 0) { | |
2171 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2172 | dev_info(tdev, "%s rejected a connection request" |
2173 | " because it is already active\n", | |
b805da74 AR |
2174 | dev->name); |
2175 | } | |
2176 | if (p_ctlbk->linkid != 1) { | |
2177 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2178 | dev_info(tdev, "%s rejected a request to open multiple" |
2179 | " connections\n", | |
b805da74 AR |
2180 | dev->name); |
2181 | } | |
2182 | rc = find_link(dev, p_connect->host_name, p_connect->WS_name); | |
2183 | if (rc != 0) { | |
2184 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2185 | dev_info(tdev, "%s rejected a connection request" |
2186 | " because of a type mismatch\n", | |
b805da74 AR |
2187 | dev->name); |
2188 | } | |
2189 | claw_send_control(dev, | |
2190 | CONNECTION_CONFIRM, p_ctlbk->linkid, | |
2191 | p_ctlbk->correlator, | |
2192 | 0, p_connect->host_name, | |
2193 | p_connect->WS_name); | |
2194 | if (p_env->packing == PACKING_ASK) { | |
2195 | p_env->packing = PACK_SEND; | |
2196 | claw_snd_conn_req(dev, 0); | |
2197 | } | |
4811fcb7 | 2198 | dev_info(tdev, "%s: CLAW device %.8s: Connection " |
b805da74 AR |
2199 | "completed link_id=%d.\n", |
2200 | dev->name, temp_ws_name, | |
2201 | p_ctlbk->linkid); | |
2202 | privptr->active_link_ID = p_ctlbk->linkid; | |
2203 | p_ch = &privptr->channel[WRITE]; | |
2204 | wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */ | |
2205 | break; | |
2206 | case CONNECTION_RESPONSE: | |
2207 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 | 2208 | dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d," |
b805da74 AR |
2209 | "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n", |
2210 | dev->name, | |
2211 | p_ctlbk->version, | |
2212 | p_ctlbk->linkid, | |
2213 | p_ctlbk->correlator, | |
2214 | p_ctlbk->rc, | |
2215 | p_connect->host_name, | |
2216 | p_connect->WS_name); | |
2217 | ||
2218 | if (p_ctlbk->rc != 0) { | |
4811fcb7 AR |
2219 | dev_warn(tdev, "The communication peer of %s rejected" |
2220 | " a connection request\n", | |
2221 | dev->name); | |
b805da74 AR |
2222 | return 1; |
2223 | } | |
2224 | rc = find_link(dev, | |
2225 | p_connect->host_name, p_connect->WS_name); | |
2226 | if (rc != 0) { | |
2227 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2228 | dev_warn(tdev, "The communication peer of %s" |
2229 | " rejected a connection " | |
2230 | "request because of a type mismatch\n", | |
b805da74 AR |
2231 | dev->name); |
2232 | } | |
2233 | /* should be until CONNECTION_CONFIRM */ | |
2234 | privptr->active_link_ID = -(p_ctlbk->linkid); | |
2235 | break; | |
2236 | case CONNECTION_CONFIRM: | |
2237 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 AR |
2238 | dev_info(tdev, |
2239 | "%s: Recv Conn Confirm:Vers=%d,link_id=%d," | |
b805da74 AR |
2240 | "Corr=%d,Host appl=%.8s,WS appl=%.8s\n", |
2241 | dev->name, | |
2242 | p_ctlbk->version, | |
2243 | p_ctlbk->linkid, | |
2244 | p_ctlbk->correlator, | |
2245 | p_connect->host_name, | |
2246 | p_connect->WS_name); | |
2247 | if (p_ctlbk->linkid == -(privptr->active_link_ID)) { | |
2248 | privptr->active_link_ID = p_ctlbk->linkid; | |
2249 | if (p_env->packing > PACKING_ASK) { | |
4811fcb7 AR |
2250 | dev_info(tdev, |
2251 | "%s: Confirmed Now packing\n", dev->name); | |
1da177e4 LT |
2252 | p_env->packing = DO_PACKED; |
2253 | } | |
b805da74 AR |
2254 | p_ch = &privptr->channel[WRITE]; |
2255 | wake_up(&p_ch->wait); | |
2256 | } else { | |
4811fcb7 AR |
2257 | dev_warn(tdev, "Activating %s failed because of" |
2258 | " an incorrect link ID=%d\n", | |
b805da74 AR |
2259 | dev->name, p_ctlbk->linkid); |
2260 | claw_snd_disc(dev, p_ctlbk); | |
2261 | } | |
2262 | break; | |
2263 | case DISCONNECT: | |
4811fcb7 | 2264 | dev_info(tdev, "%s: Disconnect: " |
b805da74 AR |
2265 | "Vers=%d,link_id=%d,Corr=%d\n", |
2266 | dev->name, p_ctlbk->version, | |
2267 | p_ctlbk->linkid, p_ctlbk->correlator); | |
2268 | if ((p_ctlbk->linkid == 2) && | |
2269 | (p_env->packing == PACK_SEND)) { | |
2270 | privptr->active_link_ID = 1; | |
2271 | p_env->packing = DO_PACKED; | |
2272 | } else | |
2273 | privptr->active_link_ID = 0; | |
2274 | break; | |
2275 | case CLAW_ERROR: | |
4811fcb7 | 2276 | dev_warn(tdev, "The communication peer of %s failed\n", |
b805da74 AR |
2277 | dev->name); |
2278 | break; | |
2279 | default: | |
4811fcb7 AR |
2280 | dev_warn(tdev, "The communication peer of %s sent" |
2281 | " an unknown command code\n", | |
2282 | dev->name); | |
b805da74 | 2283 | break; |
1da177e4 LT |
2284 | } |
2285 | ||
1da177e4 LT |
2286 | return 0; |
2287 | } /* end of claw_process_control */ | |
2288 | ||
2289 | ||
2290 | /*-------------------------------------------------------------------* | |
2291 | * claw_send_control * | |
2292 | * * | |
2293 | *--------------------------------------------------------------------*/ | |
2294 | ||
2295 | static int | |
2296 | claw_send_control(struct net_device *dev, __u8 type, __u8 link, | |
2297 | __u8 correlator, __u8 rc, char *local_name, char *remote_name) | |
2298 | { | |
2299 | struct claw_privbk *privptr; | |
2300 | struct clawctl *p_ctl; | |
2301 | struct sysval *p_sysval; | |
2302 | struct conncmd *p_connect; | |
2303 | struct sk_buff *skb; | |
2304 | ||
b805da74 | 2305 | CLAW_DBF_TEXT(2, setup, "sndcntl"); |
6951df34 | 2306 | privptr = dev->ml_priv; |
1da177e4 LT |
2307 | p_ctl=(struct clawctl *)&privptr->ctl_bk; |
2308 | ||
2309 | p_ctl->command=type; | |
2310 | p_ctl->version=CLAW_VERSION_ID; | |
2311 | p_ctl->linkid=link; | |
2312 | p_ctl->correlator=correlator; | |
2313 | p_ctl->rc=rc; | |
2314 | ||
2315 | p_sysval=(struct sysval *)&p_ctl->data; | |
2316 | p_connect=(struct conncmd *)&p_ctl->data; | |
2317 | ||
2318 | switch (p_ctl->command) { | |
2319 | case SYSTEM_VALIDATE_REQUEST: | |
2320 | case SYSTEM_VALIDATE_RESPONSE: | |
2321 | memcpy(&p_sysval->host_name, local_name, 8); | |
2322 | memcpy(&p_sysval->WS_name, remote_name, 8); | |
2323 | if (privptr->p_env->packing > 0) { | |
4811fcb7 AR |
2324 | p_sysval->read_frame_size = DEF_PACK_BUFSIZE; |
2325 | p_sysval->write_frame_size = DEF_PACK_BUFSIZE; | |
1da177e4 | 2326 | } else { |
b805da74 | 2327 | /* how big is the biggest group of packets */ |
4811fcb7 AR |
2328 | p_sysval->read_frame_size = |
2329 | privptr->p_env->read_size; | |
2330 | p_sysval->write_frame_size = | |
2331 | privptr->p_env->write_size; | |
1da177e4 LT |
2332 | } |
2333 | memset(&p_sysval->reserved, 0x00, 4); | |
2334 | break; | |
2335 | case CONNECTION_REQUEST: | |
2336 | case CONNECTION_RESPONSE: | |
2337 | case CONNECTION_CONFIRM: | |
2338 | case DISCONNECT: | |
2339 | memcpy(&p_sysval->host_name, local_name, 8); | |
2340 | memcpy(&p_sysval->WS_name, remote_name, 8); | |
2341 | if (privptr->p_env->packing > 0) { | |
2342 | /* How big is the biggest packet */ | |
2343 | p_connect->reserved1[0]=CLAW_FRAME_SIZE; | |
2344 | p_connect->reserved1[1]=CLAW_FRAME_SIZE; | |
2345 | } else { | |
2346 | memset(&p_connect->reserved1, 0x00, 4); | |
2347 | memset(&p_connect->reserved2, 0x00, 4); | |
2348 | } | |
2349 | break; | |
2350 | default: | |
2351 | break; | |
2352 | } | |
2353 | ||
2354 | /* write Control Record to the device */ | |
2355 | ||
2356 | ||
2357 | skb = dev_alloc_skb(sizeof(struct clawctl)); | |
2358 | if (!skb) { | |
1da177e4 LT |
2359 | return -ENOMEM; |
2360 | } | |
2361 | memcpy(skb_put(skb, sizeof(struct clawctl)), | |
2362 | p_ctl, sizeof(struct clawctl)); | |
1da177e4 LT |
2363 | if (privptr->p_env->packing >= PACK_SEND) |
2364 | claw_hw_tx(skb, dev, 1); | |
2365 | else | |
2366 | claw_hw_tx(skb, dev, 0); | |
1da177e4 LT |
2367 | return 0; |
2368 | } /* end of claw_send_control */ | |
2369 | ||
2370 | /*-------------------------------------------------------------------* | |
2371 | * claw_snd_conn_req * | |
2372 | * * | |
2373 | *--------------------------------------------------------------------*/ | |
2374 | static int | |
2375 | claw_snd_conn_req(struct net_device *dev, __u8 link) | |
2376 | { | |
2377 | int rc; | |
6951df34 | 2378 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 LT |
2379 | struct clawctl *p_ctl; |
2380 | ||
b805da74 | 2381 | CLAW_DBF_TEXT(2, setup, "snd_conn"); |
1da177e4 LT |
2382 | rc = 1; |
2383 | p_ctl=(struct clawctl *)&privptr->ctl_bk; | |
2384 | p_ctl->linkid = link; | |
2385 | if ( privptr->system_validate_comp==0x00 ) { | |
1da177e4 LT |
2386 | return rc; |
2387 | } | |
2388 | if (privptr->p_env->packing == PACKING_ASK ) | |
2389 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2390 | WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED); | |
2391 | if (privptr->p_env->packing == PACK_SEND) { | |
2392 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2393 | WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME); | |
2394 | } | |
2395 | if (privptr->p_env->packing == 0) | |
2396 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2397 | HOST_APPL_NAME, privptr->p_env->api_type); | |
1da177e4 LT |
2398 | return rc; |
2399 | ||
2400 | } /* end of claw_snd_conn_req */ | |
2401 | ||
2402 | ||
2403 | /*-------------------------------------------------------------------* | |
2404 | * claw_snd_disc * | |
2405 | * * | |
2406 | *--------------------------------------------------------------------*/ | |
2407 | ||
2408 | static int | |
2409 | claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl) | |
2410 | { | |
2411 | int rc; | |
2412 | struct conncmd * p_connect; | |
2413 | ||
b805da74 | 2414 | CLAW_DBF_TEXT(2, setup, "snd_dsc"); |
1da177e4 LT |
2415 | p_connect=(struct conncmd *)&p_ctl->data; |
2416 | ||
2417 | rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid, | |
2418 | p_ctl->correlator, 0, | |
2419 | p_connect->host_name, p_connect->WS_name); | |
1da177e4 LT |
2420 | return rc; |
2421 | } /* end of claw_snd_disc */ | |
2422 | ||
2423 | ||
2424 | /*-------------------------------------------------------------------* | |
2425 | * claw_snd_sys_validate_rsp * | |
2426 | * * | |
2427 | *--------------------------------------------------------------------*/ | |
2428 | ||
2429 | static int | |
2430 | claw_snd_sys_validate_rsp(struct net_device *dev, | |
2431 | struct clawctl *p_ctl, __u32 return_code) | |
2432 | { | |
2433 | struct claw_env * p_env; | |
2434 | struct claw_privbk *privptr; | |
2435 | int rc; | |
2436 | ||
b805da74 | 2437 | CLAW_DBF_TEXT(2, setup, "chkresp"); |
6951df34 | 2438 | privptr = dev->ml_priv; |
1da177e4 LT |
2439 | p_env=privptr->p_env; |
2440 | rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE, | |
2441 | p_ctl->linkid, | |
2442 | p_ctl->correlator, | |
2443 | return_code, | |
2444 | p_env->host_name, | |
2445 | p_env->adapter_name ); | |
1da177e4 LT |
2446 | return rc; |
2447 | } /* end of claw_snd_sys_validate_rsp */ | |
2448 | ||
2449 | /*-------------------------------------------------------------------* | |
2450 | * claw_strt_conn_req * | |
2451 | * * | |
2452 | *--------------------------------------------------------------------*/ | |
2453 | ||
2454 | static int | |
2455 | claw_strt_conn_req(struct net_device *dev ) | |
2456 | { | |
2457 | int rc; | |
2458 | ||
b805da74 | 2459 | CLAW_DBF_TEXT(2, setup, "conn_req"); |
1da177e4 | 2460 | rc=claw_snd_conn_req(dev, 1); |
1da177e4 LT |
2461 | return rc; |
2462 | } /* end of claw_strt_conn_req */ | |
2463 | ||
2464 | ||
2465 | ||
2466 | /*-------------------------------------------------------------------* | |
2467 | * claw_stats * | |
2468 | *-------------------------------------------------------------------*/ | |
2469 | ||
2470 | static struct | |
2471 | net_device_stats *claw_stats(struct net_device *dev) | |
2472 | { | |
2473 | struct claw_privbk *privptr; | |
b805da74 AR |
2474 | |
2475 | CLAW_DBF_TEXT(4, trace, "stats"); | |
6951df34 | 2476 | privptr = dev->ml_priv; |
1da177e4 LT |
2477 | return &privptr->stats; |
2478 | } /* end of claw_stats */ | |
2479 | ||
2480 | ||
2481 | /*-------------------------------------------------------------------* | |
2482 | * unpack_read * | |
2483 | * * | |
2484 | *--------------------------------------------------------------------*/ | |
2485 | static void | |
2486 | unpack_read(struct net_device *dev ) | |
2487 | { | |
2488 | struct sk_buff *skb; | |
2489 | struct claw_privbk *privptr; | |
2490 | struct claw_env *p_env; | |
2491 | struct ccwbk *p_this_ccw; | |
2492 | struct ccwbk *p_first_ccw; | |
2493 | struct ccwbk *p_last_ccw; | |
2494 | struct clawph *p_packh; | |
2495 | void *p_packd; | |
2496 | struct clawctl *p_ctlrec=NULL; | |
b805da74 | 2497 | struct device *p_dev; |
1da177e4 LT |
2498 | |
2499 | __u32 len_of_data; | |
2500 | __u32 pack_off; | |
2501 | __u8 link_num; | |
2502 | __u8 mtc_this_frm=0; | |
2503 | __u32 bytes_to_mov; | |
1da177e4 LT |
2504 | int i=0; |
2505 | int p=0; | |
2506 | ||
b805da74 | 2507 | CLAW_DBF_TEXT(4, trace, "unpkread"); |
1da177e4 LT |
2508 | p_first_ccw=NULL; |
2509 | p_last_ccw=NULL; | |
2510 | p_packh=NULL; | |
2511 | p_packd=NULL; | |
6951df34 | 2512 | privptr = dev->ml_priv; |
b805da74 AR |
2513 | |
2514 | p_dev = &privptr->channel[READ].cdev->dev; | |
1da177e4 LT |
2515 | p_env = privptr->p_env; |
2516 | p_this_ccw=privptr->p_read_active_first; | |
1da177e4 | 2517 | while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) { |
1da177e4 LT |
2518 | pack_off = 0; |
2519 | p = 0; | |
2520 | p_this_ccw->header.flag=CLAW_PENDING; | |
2521 | privptr->p_read_active_first=p_this_ccw->next; | |
2522 | p_this_ccw->next=NULL; | |
2523 | p_packh = (struct clawph *)p_this_ccw->p_buffer; | |
2524 | if ((p_env->packing == PACK_SEND) && | |
2525 | (p_packh->len == 32) && | |
2526 | (p_packh->link_num == 0)) { /* is it a packed ctl rec? */ | |
2527 | p_packh++; /* peek past pack header */ | |
2528 | p_ctlrec = (struct clawctl *)p_packh; | |
2529 | p_packh--; /* un peek */ | |
2530 | if ((p_ctlrec->command == CONNECTION_RESPONSE) || | |
2531 | (p_ctlrec->command == CONNECTION_CONFIRM)) | |
2532 | p_env->packing = DO_PACKED; | |
2533 | } | |
2534 | if (p_env->packing == DO_PACKED) | |
2535 | link_num=p_packh->link_num; | |
2536 | else | |
2537 | link_num=p_this_ccw->header.opcode / 8; | |
2538 | if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) { | |
1da177e4 LT |
2539 | mtc_this_frm=1; |
2540 | if (p_this_ccw->header.length!= | |
2541 | privptr->p_env->read_size ) { | |
4811fcb7 AR |
2542 | dev_warn(p_dev, |
2543 | "The communication peer of %s" | |
2544 | " sent a faulty" | |
2545 | " frame of length %02x\n", | |
1da177e4 LT |
2546 | dev->name, p_this_ccw->header.length); |
2547 | } | |
2548 | } | |
2549 | ||
2550 | if (privptr->mtc_skipping) { | |
2551 | /* | |
2552 | * We're in the mode of skipping past a | |
2553 | * multi-frame message | |
2554 | * that we can't process for some reason or other. | |
2555 | * The first frame without the More-To-Come flag is | |
2556 | * the last frame of the skipped message. | |
2557 | */ | |
2558 | /* in case of More-To-Come not set in this frame */ | |
2559 | if (mtc_this_frm==0) { | |
2560 | privptr->mtc_skipping=0; /* Ok, the end */ | |
2561 | privptr->mtc_logical_link=-1; | |
2562 | } | |
1da177e4 LT |
2563 | goto NextFrame; |
2564 | } | |
2565 | ||
2566 | if (link_num==0) { | |
2567 | claw_process_control(dev, p_this_ccw); | |
b805da74 | 2568 | CLAW_DBF_TEXT(4, trace, "UnpkCntl"); |
1da177e4 LT |
2569 | goto NextFrame; |
2570 | } | |
2571 | unpack_next: | |
2572 | if (p_env->packing == DO_PACKED) { | |
2573 | if (pack_off > p_env->read_size) | |
2574 | goto NextFrame; | |
2575 | p_packd = p_this_ccw->p_buffer+pack_off; | |
2576 | p_packh = (struct clawph *) p_packd; | |
4811fcb7 | 2577 | if ((p_packh->len == 0) || /* done with this frame? */ |
1da177e4 LT |
2578 | (p_packh->flag != 0)) |
2579 | goto NextFrame; | |
2580 | bytes_to_mov = p_packh->len; | |
2581 | pack_off += bytes_to_mov+sizeof(struct clawph); | |
2582 | p++; | |
2583 | } else { | |
2584 | bytes_to_mov=p_this_ccw->header.length; | |
2585 | } | |
2586 | if (privptr->mtc_logical_link<0) { | |
1da177e4 LT |
2587 | |
2588 | /* | |
2589 | * if More-To-Come is set in this frame then we don't know | |
2590 | * length of entire message, and hence have to allocate | |
2591 | * large buffer */ | |
2592 | ||
2593 | /* We are starting a new envelope */ | |
2594 | privptr->mtc_offset=0; | |
2595 | privptr->mtc_logical_link=link_num; | |
2596 | } | |
2597 | ||
2598 | if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) { | |
2599 | /* error */ | |
1da177e4 LT |
2600 | privptr->stats.rx_frame_errors++; |
2601 | goto NextFrame; | |
2602 | } | |
2603 | if (p_env->packing == DO_PACKED) { | |
2604 | memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, | |
2605 | p_packd+sizeof(struct clawph), bytes_to_mov); | |
2606 | ||
2607 | } else { | |
2608 | memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, | |
2609 | p_this_ccw->p_buffer, bytes_to_mov); | |
2610 | } | |
1da177e4 LT |
2611 | if (mtc_this_frm==0) { |
2612 | len_of_data=privptr->mtc_offset+bytes_to_mov; | |
2613 | skb=dev_alloc_skb(len_of_data); | |
2614 | if (skb) { | |
2615 | memcpy(skb_put(skb,len_of_data), | |
2616 | privptr->p_mtc_envelope, | |
2617 | len_of_data); | |
1da177e4 | 2618 | skb->dev=dev; |
98e399f8 | 2619 | skb_reset_mac_header(skb); |
1da177e4 LT |
2620 | skb->protocol=htons(ETH_P_IP); |
2621 | skb->ip_summed=CHECKSUM_UNNECESSARY; | |
2622 | privptr->stats.rx_packets++; | |
2623 | privptr->stats.rx_bytes+=len_of_data; | |
2624 | netif_rx(skb); | |
1da177e4 LT |
2625 | } |
2626 | else { | |
4811fcb7 AR |
2627 | dev_info(p_dev, "Allocating a buffer for" |
2628 | " incoming data failed\n"); | |
1da177e4 | 2629 | privptr->stats.rx_dropped++; |
1da177e4 LT |
2630 | } |
2631 | privptr->mtc_offset=0; | |
2632 | privptr->mtc_logical_link=-1; | |
2633 | } | |
2634 | else { | |
2635 | privptr->mtc_offset+=bytes_to_mov; | |
2636 | } | |
2637 | if (p_env->packing == DO_PACKED) | |
2638 | goto unpack_next; | |
2639 | NextFrame: | |
2640 | /* | |
2641 | * Remove ThisCCWblock from active read queue, and add it | |
2642 | * to queue of free blocks to be reused. | |
2643 | */ | |
2644 | i++; | |
2645 | p_this_ccw->header.length=0xffff; | |
2646 | p_this_ccw->header.opcode=0xff; | |
2647 | /* | |
2648 | * add this one to the free queue for later reuse | |
2649 | */ | |
2650 | if (p_first_ccw==NULL) { | |
2651 | p_first_ccw = p_this_ccw; | |
2652 | } | |
2653 | else { | |
2654 | p_last_ccw->next = p_this_ccw; | |
2655 | } | |
2656 | p_last_ccw = p_this_ccw; | |
2657 | /* | |
2658 | * chain to next block on active read queue | |
2659 | */ | |
2660 | p_this_ccw = privptr->p_read_active_first; | |
b805da74 | 2661 | CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p); |
1da177e4 LT |
2662 | } /* end of while */ |
2663 | ||
2664 | /* check validity */ | |
2665 | ||
b805da74 | 2666 | CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i); |
1da177e4 | 2667 | add_claw_reads(dev, p_first_ccw, p_last_ccw); |
1da177e4 | 2668 | claw_strt_read(dev, LOCK_YES); |
1da177e4 LT |
2669 | return; |
2670 | } /* end of unpack_read */ | |
2671 | ||
2672 | /*-------------------------------------------------------------------* | |
2673 | * claw_strt_read * | |
2674 | * * | |
2675 | *--------------------------------------------------------------------*/ | |
2676 | static void | |
2677 | claw_strt_read (struct net_device *dev, int lock ) | |
2678 | { | |
2679 | int rc = 0; | |
2680 | __u32 parm; | |
2681 | unsigned long saveflags = 0; | |
6951df34 | 2682 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 LT |
2683 | struct ccwbk*p_ccwbk; |
2684 | struct chbk *p_ch; | |
2685 | struct clawh *p_clawh; | |
2686 | p_ch=&privptr->channel[READ]; | |
2687 | ||
b805da74 | 2688 | CLAW_DBF_TEXT(4, trace, "StRdNter"); |
1da177e4 LT |
2689 | p_clawh=(struct clawh *)privptr->p_claw_signal_blk; |
2690 | p_clawh->flag=CLAW_IDLE; /* 0x00 */ | |
2691 | ||
2692 | if ((privptr->p_write_active_first!=NULL && | |
2693 | privptr->p_write_active_first->header.flag!=CLAW_PENDING) || | |
2694 | (privptr->p_read_active_first!=NULL && | |
2695 | privptr->p_read_active_first->header.flag!=CLAW_PENDING )) { | |
2696 | p_clawh->flag=CLAW_BUSY; /* 0xff */ | |
2697 | } | |
1da177e4 LT |
2698 | if (lock==LOCK_YES) { |
2699 | spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags); | |
2700 | } | |
2701 | if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { | |
b805da74 | 2702 | CLAW_DBF_TEXT(4, trace, "HotRead"); |
1da177e4 LT |
2703 | p_ccwbk=privptr->p_read_active_first; |
2704 | parm = (unsigned long) p_ch; | |
2705 | rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm, | |
2706 | 0xff, 0); | |
2707 | if (rc != 0) { | |
2708 | ccw_check_return_code(p_ch->cdev, rc); | |
2709 | } | |
2710 | } | |
2711 | else { | |
b805da74 | 2712 | CLAW_DBF_TEXT(2, trace, "ReadAct"); |
1da177e4 LT |
2713 | } |
2714 | ||
2715 | if (lock==LOCK_YES) { | |
2716 | spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags); | |
2717 | } | |
b805da74 | 2718 | CLAW_DBF_TEXT(4, trace, "StRdExit"); |
1da177e4 LT |
2719 | return; |
2720 | } /* end of claw_strt_read */ | |
2721 | ||
2722 | /*-------------------------------------------------------------------* | |
2723 | * claw_strt_out_IO * | |
2724 | * * | |
2725 | *--------------------------------------------------------------------*/ | |
2726 | ||
2727 | static void | |
2728 | claw_strt_out_IO( struct net_device *dev ) | |
2729 | { | |
2730 | int rc = 0; | |
2731 | unsigned long parm; | |
2732 | struct claw_privbk *privptr; | |
2733 | struct chbk *p_ch; | |
2734 | struct ccwbk *p_first_ccw; | |
2735 | ||
1da177e4 LT |
2736 | if (!dev) { |
2737 | return; | |
2738 | } | |
6951df34 | 2739 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
2740 | p_ch=&privptr->channel[WRITE]; |
2741 | ||
b805da74 | 2742 | CLAW_DBF_TEXT(4, trace, "strt_io"); |
1da177e4 LT |
2743 | p_first_ccw=privptr->p_write_active_first; |
2744 | ||
2745 | if (p_ch->claw_state == CLAW_STOP) | |
2746 | return; | |
2747 | if (p_first_ccw == NULL) { | |
1da177e4 LT |
2748 | return; |
2749 | } | |
2750 | if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { | |
2751 | parm = (unsigned long) p_ch; | |
b805da74 | 2752 | CLAW_DBF_TEXT(2, trace, "StWrtIO"); |
4811fcb7 AR |
2753 | rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm, |
2754 | 0xff, 0); | |
1da177e4 LT |
2755 | if (rc != 0) { |
2756 | ccw_check_return_code(p_ch->cdev, rc); | |
2757 | } | |
2758 | } | |
2759 | dev->trans_start = jiffies; | |
1da177e4 LT |
2760 | return; |
2761 | } /* end of claw_strt_out_IO */ | |
2762 | ||
2763 | /*-------------------------------------------------------------------* | |
2764 | * Free write buffers * | |
2765 | * * | |
2766 | *--------------------------------------------------------------------*/ | |
2767 | ||
2768 | static void | |
2769 | claw_free_wrt_buf( struct net_device *dev ) | |
2770 | { | |
2771 | ||
6951df34 | 2772 | struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
2773 | struct ccwbk*p_first_ccw; |
2774 | struct ccwbk*p_last_ccw; | |
2775 | struct ccwbk*p_this_ccw; | |
2776 | struct ccwbk*p_next_ccw; | |
b805da74 AR |
2777 | |
2778 | CLAW_DBF_TEXT(4, trace, "freewrtb"); | |
1da177e4 LT |
2779 | /* scan the write queue to free any completed write packets */ |
2780 | p_first_ccw=NULL; | |
2781 | p_last_ccw=NULL; | |
1da177e4 LT |
2782 | p_this_ccw=privptr->p_write_active_first; |
2783 | while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING)) | |
2784 | { | |
2785 | p_next_ccw = p_this_ccw->next; | |
2786 | if (((p_next_ccw!=NULL) && | |
2787 | (p_next_ccw->header.flag!=CLAW_PENDING)) || | |
2788 | ((p_this_ccw == privptr->p_write_active_last) && | |
2789 | (p_this_ccw->header.flag!=CLAW_PENDING))) { | |
2790 | /* The next CCW is OK or this is */ | |
2791 | /* the last CCW...free it @A1A */ | |
2792 | privptr->p_write_active_first=p_this_ccw->next; | |
2793 | p_this_ccw->header.flag=CLAW_PENDING; | |
2794 | p_this_ccw->next=privptr->p_write_free_chain; | |
2795 | privptr->p_write_free_chain=p_this_ccw; | |
2796 | ++privptr->write_free_count; | |
2797 | privptr->stats.tx_bytes+= p_this_ccw->write.count; | |
2798 | p_this_ccw=privptr->p_write_active_first; | |
2799 | privptr->stats.tx_packets++; | |
2800 | } | |
2801 | else { | |
2802 | break; | |
2803 | } | |
2804 | } | |
2805 | if (privptr->write_free_count!=0) { | |
2806 | claw_clearbit_busy(TB_NOBUFFER,dev); | |
2807 | } | |
2808 | /* whole chain removed? */ | |
2809 | if (privptr->p_write_active_first==NULL) { | |
2810 | privptr->p_write_active_last=NULL; | |
1da177e4 | 2811 | } |
b805da74 | 2812 | CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count); |
1da177e4 LT |
2813 | return; |
2814 | } | |
2815 | ||
2816 | /*-------------------------------------------------------------------* | |
2817 | * claw free netdevice * | |
2818 | * * | |
2819 | *--------------------------------------------------------------------*/ | |
2820 | static void | |
2821 | claw_free_netdevice(struct net_device * dev, int free_dev) | |
2822 | { | |
2823 | struct claw_privbk *privptr; | |
1da177e4 | 2824 | |
b805da74 | 2825 | CLAW_DBF_TEXT(2, setup, "free_dev"); |
1da177e4 LT |
2826 | if (!dev) |
2827 | return; | |
b805da74 | 2828 | CLAW_DBF_TEXT_(2, setup, "%s", dev->name); |
6951df34 | 2829 | privptr = dev->ml_priv; |
1da177e4 LT |
2830 | if (dev->flags & IFF_RUNNING) |
2831 | claw_release(dev); | |
2832 | if (privptr) { | |
2833 | privptr->channel[READ].ndev = NULL; /* say it's free */ | |
2834 | } | |
6951df34 | 2835 | dev->ml_priv = NULL; |
1da177e4 LT |
2836 | #ifdef MODULE |
2837 | if (free_dev) { | |
2838 | free_netdev(dev); | |
2839 | } | |
2840 | #endif | |
b805da74 | 2841 | CLAW_DBF_TEXT(2, setup, "free_ok"); |
1da177e4 LT |
2842 | } |
2843 | ||
2844 | /** | |
2845 | * Claw init netdevice | |
2846 | * Initialize everything of the net device except the name and the | |
2847 | * channel structs. | |
2848 | */ | |
2171dc18 FB |
2849 | static const struct net_device_ops claw_netdev_ops = { |
2850 | .ndo_open = claw_open, | |
2851 | .ndo_stop = claw_release, | |
2852 | .ndo_get_stats = claw_stats, | |
2853 | .ndo_start_xmit = claw_tx, | |
2854 | .ndo_change_mtu = claw_change_mtu, | |
2855 | }; | |
2856 | ||
1da177e4 LT |
2857 | static void |
2858 | claw_init_netdevice(struct net_device * dev) | |
2859 | { | |
b805da74 AR |
2860 | CLAW_DBF_TEXT(2, setup, "init_dev"); |
2861 | CLAW_DBF_TEXT_(2, setup, "%s", dev->name); | |
1da177e4 | 2862 | dev->mtu = CLAW_DEFAULT_MTU_SIZE; |
1da177e4 LT |
2863 | dev->hard_header_len = 0; |
2864 | dev->addr_len = 0; | |
2865 | dev->type = ARPHRD_SLIP; | |
2866 | dev->tx_queue_len = 1300; | |
2867 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
2171dc18 | 2868 | dev->netdev_ops = &claw_netdev_ops; |
b805da74 | 2869 | CLAW_DBF_TEXT(2, setup, "initok"); |
1da177e4 LT |
2870 | return; |
2871 | } | |
2872 | ||
2873 | /** | |
2874 | * Init a new channel in the privptr->channel[i]. | |
2875 | * | |
2876 | * @param cdev The ccw_device to be added. | |
2877 | * | |
2878 | * @return 0 on success, !0 on error. | |
2879 | */ | |
2880 | static int | |
2881 | add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr) | |
2882 | { | |
2883 | struct chbk *p_ch; | |
dc5bc0ca | 2884 | struct ccw_dev_id dev_id; |
1da177e4 | 2885 | |
2a0217d5 | 2886 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev)); |
1da177e4 LT |
2887 | privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */ |
2888 | p_ch = &privptr->channel[i]; | |
2889 | p_ch->cdev = cdev; | |
2a0217d5 | 2890 | snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev)); |
dc5bc0ca CH |
2891 | ccw_device_get_id(cdev, &dev_id); |
2892 | p_ch->devno = dev_id.devno; | |
dd00cc48 | 2893 | if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) { |
1da177e4 LT |
2894 | return -ENOMEM; |
2895 | } | |
1da177e4 LT |
2896 | return 0; |
2897 | } | |
2898 | ||
2899 | ||
2900 | /** | |
2901 | * | |
2902 | * Setup an interface. | |
2903 | * | |
2904 | * @param cgdev Device to be setup. | |
2905 | * | |
2906 | * @returns 0 on success, !0 on failure. | |
2907 | */ | |
2908 | static int | |
2909 | claw_new_device(struct ccwgroup_device *cgdev) | |
2910 | { | |
2911 | struct claw_privbk *privptr; | |
2912 | struct claw_env *p_env; | |
2913 | struct net_device *dev; | |
2914 | int ret; | |
dc5bc0ca | 2915 | struct ccw_dev_id dev_id; |
1da177e4 | 2916 | |
4811fcb7 AR |
2917 | dev_info(&cgdev->dev, "add for %s\n", |
2918 | dev_name(&cgdev->cdev[READ]->dev)); | |
b805da74 | 2919 | CLAW_DBF_TEXT(2, setup, "new_dev"); |
dff59b64 GKH |
2920 | privptr = dev_get_drvdata(&cgdev->dev); |
2921 | dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr); | |
2922 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr); | |
1da177e4 LT |
2923 | if (!privptr) |
2924 | return -ENODEV; | |
2925 | p_env = privptr->p_env; | |
dc5bc0ca CH |
2926 | ccw_device_get_id(cgdev->cdev[READ], &dev_id); |
2927 | p_env->devno[READ] = dev_id.devno; | |
2928 | ccw_device_get_id(cgdev->cdev[WRITE], &dev_id); | |
2929 | p_env->devno[WRITE] = dev_id.devno; | |
1da177e4 LT |
2930 | ret = add_channel(cgdev->cdev[0],0,privptr); |
2931 | if (ret == 0) | |
2932 | ret = add_channel(cgdev->cdev[1],1,privptr); | |
2933 | if (ret != 0) { | |
4811fcb7 AR |
2934 | dev_warn(&cgdev->dev, "Creating a CLAW group device" |
2935 | " failed with error code %d\n", ret); | |
b805da74 | 2936 | goto out; |
1da177e4 LT |
2937 | } |
2938 | ret = ccw_device_set_online(cgdev->cdev[READ]); | |
2939 | if (ret != 0) { | |
4811fcb7 AR |
2940 | dev_warn(&cgdev->dev, |
2941 | "Setting the read subchannel online" | |
2942 | " failed with error code %d\n", ret); | |
1da177e4 LT |
2943 | goto out; |
2944 | } | |
2945 | ret = ccw_device_set_online(cgdev->cdev[WRITE]); | |
2946 | if (ret != 0) { | |
4811fcb7 AR |
2947 | dev_warn(&cgdev->dev, |
2948 | "Setting the write subchannel online " | |
2949 | "failed with error code %d\n", ret); | |
1da177e4 LT |
2950 | goto out; |
2951 | } | |
2952 | dev = alloc_netdev(0,"claw%d",claw_init_netdevice); | |
2953 | if (!dev) { | |
4811fcb7 AR |
2954 | dev_warn(&cgdev->dev, |
2955 | "Activating the CLAW device failed\n"); | |
1da177e4 LT |
2956 | goto out; |
2957 | } | |
6951df34 | 2958 | dev->ml_priv = privptr; |
dff59b64 GKH |
2959 | dev_set_drvdata(&cgdev->dev, privptr); |
2960 | dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr); | |
2961 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr); | |
1da177e4 LT |
2962 | /* sysfs magic */ |
2963 | SET_NETDEV_DEV(dev, &cgdev->dev); | |
2964 | if (register_netdev(dev) != 0) { | |
2965 | claw_free_netdevice(dev, 1); | |
b805da74 | 2966 | CLAW_DBF_TEXT(2, trace, "regfail"); |
1da177e4 LT |
2967 | goto out; |
2968 | } | |
2969 | dev->flags &=~IFF_RUNNING; | |
2970 | if (privptr->buffs_alloc == 0) { | |
2971 | ret=init_ccw_bk(dev); | |
2972 | if (ret !=0) { | |
1da177e4 LT |
2973 | unregister_netdev(dev); |
2974 | claw_free_netdevice(dev,1); | |
b805da74 | 2975 | CLAW_DBF_TEXT(2, trace, "ccwmem"); |
1da177e4 LT |
2976 | goto out; |
2977 | } | |
2978 | } | |
2979 | privptr->channel[READ].ndev = dev; | |
2980 | privptr->channel[WRITE].ndev = dev; | |
2981 | privptr->p_env->ndev = dev; | |
2982 | ||
4811fcb7 | 2983 | dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d " |
1da177e4 LT |
2984 | "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n", |
2985 | dev->name, p_env->read_size, | |
2986 | p_env->write_size, p_env->read_buffers, | |
2987 | p_env->write_buffers, p_env->devno[READ], | |
2988 | p_env->devno[WRITE]); | |
4811fcb7 | 2989 | dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name " |
1da177e4 LT |
2990 | ":%.8s api_type: %.8s\n", |
2991 | dev->name, p_env->host_name, | |
2992 | p_env->adapter_name , p_env->api_type); | |
2993 | return 0; | |
2994 | out: | |
2995 | ccw_device_set_offline(cgdev->cdev[1]); | |
2996 | ccw_device_set_offline(cgdev->cdev[0]); | |
1da177e4 LT |
2997 | return -ENODEV; |
2998 | } | |
2999 | ||
3000 | static void | |
3001 | claw_purge_skb_queue(struct sk_buff_head *q) | |
3002 | { | |
3003 | struct sk_buff *skb; | |
3004 | ||
b805da74 | 3005 | CLAW_DBF_TEXT(4, trace, "purgque"); |
1da177e4 LT |
3006 | while ((skb = skb_dequeue(q))) { |
3007 | atomic_dec(&skb->users); | |
8e84c801 | 3008 | dev_kfree_skb_any(skb); |
1da177e4 LT |
3009 | } |
3010 | } | |
3011 | ||
3012 | /** | |
3013 | * Shutdown an interface. | |
3014 | * | |
3015 | * @param cgdev Device to be shut down. | |
3016 | * | |
3017 | * @returns 0 on success, !0 on failure. | |
3018 | */ | |
3019 | static int | |
3020 | claw_shutdown_device(struct ccwgroup_device *cgdev) | |
3021 | { | |
3022 | struct claw_privbk *priv; | |
3023 | struct net_device *ndev; | |
3024 | int ret; | |
3025 | ||
b9d3aed7 | 3026 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); |
dff59b64 | 3027 | priv = dev_get_drvdata(&cgdev->dev); |
1da177e4 LT |
3028 | if (!priv) |
3029 | return -ENODEV; | |
3030 | ndev = priv->channel[READ].ndev; | |
3031 | if (ndev) { | |
3032 | /* Close the device */ | |
4811fcb7 AR |
3033 | dev_info(&cgdev->dev, "%s: shutting down \n", |
3034 | ndev->name); | |
1da177e4 LT |
3035 | if (ndev->flags & IFF_RUNNING) |
3036 | ret = claw_release(ndev); | |
3037 | ndev->flags &=~IFF_RUNNING; | |
3038 | unregister_netdev(ndev); | |
6951df34 | 3039 | ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */ |
1da177e4 LT |
3040 | claw_free_netdevice(ndev, 1); |
3041 | priv->channel[READ].ndev = NULL; | |
3042 | priv->channel[WRITE].ndev = NULL; | |
3043 | priv->p_env->ndev = NULL; | |
3044 | } | |
3045 | ccw_device_set_offline(cgdev->cdev[1]); | |
3046 | ccw_device_set_offline(cgdev->cdev[0]); | |
3047 | return 0; | |
3048 | } | |
3049 | ||
3050 | static void | |
3051 | claw_remove_device(struct ccwgroup_device *cgdev) | |
3052 | { | |
3053 | struct claw_privbk *priv; | |
3054 | ||
b805da74 | 3055 | BUG_ON(!cgdev); |
b9d3aed7 | 3056 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); |
dff59b64 | 3057 | priv = dev_get_drvdata(&cgdev->dev); |
b805da74 | 3058 | BUG_ON(!priv); |
4811fcb7 | 3059 | dev_info(&cgdev->dev, " will be removed.\n"); |
1da177e4 LT |
3060 | if (cgdev->state == CCWGROUP_ONLINE) |
3061 | claw_shutdown_device(cgdev); | |
3062 | claw_remove_files(&cgdev->dev); | |
17fd682e JJ |
3063 | kfree(priv->p_mtc_envelope); |
3064 | priv->p_mtc_envelope=NULL; | |
3065 | kfree(priv->p_env); | |
3066 | priv->p_env=NULL; | |
3067 | kfree(priv->channel[0].irb); | |
3068 | priv->channel[0].irb=NULL; | |
3069 | kfree(priv->channel[1].irb); | |
3070 | priv->channel[1].irb=NULL; | |
1da177e4 | 3071 | kfree(priv); |
dff59b64 GKH |
3072 | dev_set_drvdata(&cgdev->dev, NULL); |
3073 | dev_set_drvdata(&cgdev->cdev[READ]->dev, NULL); | |
3074 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, NULL); | |
1da177e4 | 3075 | put_device(&cgdev->dev); |
b805da74 AR |
3076 | |
3077 | return; | |
1da177e4 LT |
3078 | } |
3079 | ||
3080 | ||
3081 | /* | |
3082 | * sysfs attributes | |
3083 | */ | |
3084 | static ssize_t | |
3fd3c0a5 | 3085 | claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3086 | { |
3087 | struct claw_privbk *priv; | |
3088 | struct claw_env * p_env; | |
3089 | ||
dff59b64 | 3090 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3091 | if (!priv) |
3092 | return -ENODEV; | |
3093 | p_env = priv->p_env; | |
3094 | return sprintf(buf, "%s\n",p_env->host_name); | |
3095 | } | |
3096 | ||
3097 | static ssize_t | |
4811fcb7 AR |
3098 | claw_hname_write(struct device *dev, struct device_attribute *attr, |
3099 | const char *buf, size_t count) | |
1da177e4 LT |
3100 | { |
3101 | struct claw_privbk *priv; | |
3102 | struct claw_env * p_env; | |
3103 | ||
dff59b64 | 3104 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3105 | if (!priv) |
3106 | return -ENODEV; | |
3107 | p_env = priv->p_env; | |
3108 | if (count > MAX_NAME_LEN+1) | |
3109 | return -EINVAL; | |
3110 | memset(p_env->host_name, 0x20, MAX_NAME_LEN); | |
3111 | strncpy(p_env->host_name,buf, count); | |
3112 | p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */ | |
3113 | p_env->host_name[MAX_NAME_LEN] = 0x00; | |
b805da74 AR |
3114 | CLAW_DBF_TEXT(2, setup, "HstnSet"); |
3115 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name); | |
1da177e4 LT |
3116 | |
3117 | return count; | |
3118 | } | |
3119 | ||
3120 | static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write); | |
3121 | ||
3122 | static ssize_t | |
3fd3c0a5 | 3123 | claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3124 | { |
3125 | struct claw_privbk *priv; | |
3126 | struct claw_env * p_env; | |
3127 | ||
dff59b64 | 3128 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3129 | if (!priv) |
3130 | return -ENODEV; | |
3131 | p_env = priv->p_env; | |
b805da74 | 3132 | return sprintf(buf, "%s\n", p_env->adapter_name); |
1da177e4 LT |
3133 | } |
3134 | ||
3135 | static ssize_t | |
4811fcb7 AR |
3136 | claw_adname_write(struct device *dev, struct device_attribute *attr, |
3137 | const char *buf, size_t count) | |
1da177e4 LT |
3138 | { |
3139 | struct claw_privbk *priv; | |
3140 | struct claw_env * p_env; | |
3141 | ||
dff59b64 | 3142 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3143 | if (!priv) |
3144 | return -ENODEV; | |
3145 | p_env = priv->p_env; | |
3146 | if (count > MAX_NAME_LEN+1) | |
3147 | return -EINVAL; | |
3148 | memset(p_env->adapter_name, 0x20, MAX_NAME_LEN); | |
3149 | strncpy(p_env->adapter_name,buf, count); | |
3150 | p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */ | |
3151 | p_env->adapter_name[MAX_NAME_LEN] = 0x00; | |
b805da74 AR |
3152 | CLAW_DBF_TEXT(2, setup, "AdnSet"); |
3153 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name); | |
1da177e4 LT |
3154 | |
3155 | return count; | |
3156 | } | |
3157 | ||
3158 | static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write); | |
3159 | ||
3160 | static ssize_t | |
3fd3c0a5 | 3161 | claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3162 | { |
3163 | struct claw_privbk *priv; | |
3164 | struct claw_env * p_env; | |
3165 | ||
dff59b64 | 3166 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3167 | if (!priv) |
3168 | return -ENODEV; | |
3169 | p_env = priv->p_env; | |
3170 | return sprintf(buf, "%s\n", | |
3171 | p_env->api_type); | |
3172 | } | |
3173 | ||
3174 | static ssize_t | |
4811fcb7 AR |
3175 | claw_apname_write(struct device *dev, struct device_attribute *attr, |
3176 | const char *buf, size_t count) | |
1da177e4 LT |
3177 | { |
3178 | struct claw_privbk *priv; | |
3179 | struct claw_env * p_env; | |
3180 | ||
dff59b64 | 3181 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3182 | if (!priv) |
3183 | return -ENODEV; | |
3184 | p_env = priv->p_env; | |
3185 | if (count > MAX_NAME_LEN+1) | |
3186 | return -EINVAL; | |
3187 | memset(p_env->api_type, 0x20, MAX_NAME_LEN); | |
3188 | strncpy(p_env->api_type,buf, count); | |
3189 | p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */ | |
3190 | p_env->api_type[MAX_NAME_LEN] = 0x00; | |
3191 | if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { | |
3192 | p_env->read_size=DEF_PACK_BUFSIZE; | |
3193 | p_env->write_size=DEF_PACK_BUFSIZE; | |
3194 | p_env->packing=PACKING_ASK; | |
b805da74 | 3195 | CLAW_DBF_TEXT(2, setup, "PACKING"); |
1da177e4 LT |
3196 | } |
3197 | else { | |
3198 | p_env->packing=0; | |
3199 | p_env->read_size=CLAW_FRAME_SIZE; | |
3200 | p_env->write_size=CLAW_FRAME_SIZE; | |
b805da74 | 3201 | CLAW_DBF_TEXT(2, setup, "ApiSet"); |
1da177e4 | 3202 | } |
b805da74 | 3203 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type); |
1da177e4 LT |
3204 | return count; |
3205 | } | |
3206 | ||
3207 | static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write); | |
3208 | ||
3209 | static ssize_t | |
3fd3c0a5 | 3210 | claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3211 | { |
3212 | struct claw_privbk *priv; | |
3213 | struct claw_env * p_env; | |
3214 | ||
dff59b64 | 3215 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3216 | if (!priv) |
3217 | return -ENODEV; | |
3218 | p_env = priv->p_env; | |
3219 | return sprintf(buf, "%d\n", p_env->write_buffers); | |
3220 | } | |
3221 | ||
3222 | static ssize_t | |
4811fcb7 AR |
3223 | claw_wbuff_write(struct device *dev, struct device_attribute *attr, |
3224 | const char *buf, size_t count) | |
1da177e4 LT |
3225 | { |
3226 | struct claw_privbk *priv; | |
3227 | struct claw_env * p_env; | |
3228 | int nnn,max; | |
3229 | ||
dff59b64 | 3230 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3231 | if (!priv) |
3232 | return -ENODEV; | |
3233 | p_env = priv->p_env; | |
3234 | sscanf(buf, "%i", &nnn); | |
3235 | if (p_env->packing) { | |
3236 | max = 64; | |
3237 | } | |
3238 | else { | |
3239 | max = 512; | |
3240 | } | |
3241 | if ((nnn > max ) || (nnn < 2)) | |
3242 | return -EINVAL; | |
3243 | p_env->write_buffers = nnn; | |
b805da74 AR |
3244 | CLAW_DBF_TEXT(2, setup, "Wbufset"); |
3245 | CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers); | |
1da177e4 LT |
3246 | return count; |
3247 | } | |
3248 | ||
3249 | static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write); | |
3250 | ||
3251 | static ssize_t | |
3fd3c0a5 | 3252 | claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3253 | { |
3254 | struct claw_privbk *priv; | |
3255 | struct claw_env * p_env; | |
3256 | ||
dff59b64 | 3257 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3258 | if (!priv) |
3259 | return -ENODEV; | |
3260 | p_env = priv->p_env; | |
3261 | return sprintf(buf, "%d\n", p_env->read_buffers); | |
3262 | } | |
3263 | ||
3264 | static ssize_t | |
4811fcb7 AR |
3265 | claw_rbuff_write(struct device *dev, struct device_attribute *attr, |
3266 | const char *buf, size_t count) | |
1da177e4 LT |
3267 | { |
3268 | struct claw_privbk *priv; | |
3269 | struct claw_env *p_env; | |
3270 | int nnn,max; | |
3271 | ||
dff59b64 | 3272 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3273 | if (!priv) |
3274 | return -ENODEV; | |
3275 | p_env = priv->p_env; | |
3276 | sscanf(buf, "%i", &nnn); | |
3277 | if (p_env->packing) { | |
3278 | max = 64; | |
3279 | } | |
3280 | else { | |
3281 | max = 512; | |
3282 | } | |
3283 | if ((nnn > max ) || (nnn < 2)) | |
3284 | return -EINVAL; | |
3285 | p_env->read_buffers = nnn; | |
b805da74 AR |
3286 | CLAW_DBF_TEXT(2, setup, "Rbufset"); |
3287 | CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers); | |
1da177e4 LT |
3288 | return count; |
3289 | } | |
3290 | ||
3291 | static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write); | |
3292 | ||
3293 | static struct attribute *claw_attr[] = { | |
3294 | &dev_attr_read_buffer.attr, | |
3295 | &dev_attr_write_buffer.attr, | |
3296 | &dev_attr_adapter_name.attr, | |
3297 | &dev_attr_api_type.attr, | |
3298 | &dev_attr_host_name.attr, | |
3299 | NULL, | |
3300 | }; | |
3301 | ||
3302 | static struct attribute_group claw_attr_group = { | |
3303 | .attrs = claw_attr, | |
3304 | }; | |
3305 | ||
3306 | static int | |
3307 | claw_add_files(struct device *dev) | |
3308 | { | |
b805da74 | 3309 | CLAW_DBF_TEXT(2, setup, "add_file"); |
1da177e4 LT |
3310 | return sysfs_create_group(&dev->kobj, &claw_attr_group); |
3311 | } | |
3312 | ||
3313 | static void | |
3314 | claw_remove_files(struct device *dev) | |
3315 | { | |
b805da74 | 3316 | CLAW_DBF_TEXT(2, setup, "rem_file"); |
1da177e4 LT |
3317 | sysfs_remove_group(&dev->kobj, &claw_attr_group); |
3318 | } | |
3319 | ||
3320 | /*--------------------------------------------------------------------* | |
3321 | * claw_init and cleanup * | |
3322 | *---------------------------------------------------------------------*/ | |
3323 | ||
3324 | static void __exit | |
3325 | claw_cleanup(void) | |
3326 | { | |
3327 | unregister_cu3088_discipline(&claw_group_driver); | |
3328 | claw_unregister_debug_facility(); | |
4811fcb7 | 3329 | pr_info("Driver unloaded\n"); |
1da177e4 LT |
3330 | |
3331 | } | |
3332 | ||
3333 | /** | |
3334 | * Initialize module. | |
3335 | * This is called just after the module is loaded. | |
3336 | * | |
3337 | * @return 0 on success, !0 on error. | |
3338 | */ | |
3339 | static int __init | |
3340 | claw_init(void) | |
3341 | { | |
3342 | int ret = 0; | |
1da177e4 | 3343 | |
4811fcb7 | 3344 | pr_info("Loading %s\n", version); |
1da177e4 LT |
3345 | ret = claw_register_debug_facility(); |
3346 | if (ret) { | |
4811fcb7 AR |
3347 | pr_err("Registering with the S/390 debug feature" |
3348 | " failed with error code %d\n", ret); | |
1da177e4 LT |
3349 | return ret; |
3350 | } | |
b805da74 | 3351 | CLAW_DBF_TEXT(2, setup, "init_mod"); |
1da177e4 LT |
3352 | ret = register_cu3088_discipline(&claw_group_driver); |
3353 | if (ret) { | |
b805da74 | 3354 | CLAW_DBF_TEXT(2, setup, "init_bad"); |
1da177e4 | 3355 | claw_unregister_debug_facility(); |
4811fcb7 AR |
3356 | pr_err("Registering with the cu3088 device driver failed " |
3357 | "with error code %d\n", ret); | |
1da177e4 | 3358 | } |
1da177e4 LT |
3359 | return ret; |
3360 | } | |
3361 | ||
3362 | module_init(claw_init); | |
3363 | module_exit(claw_cleanup); | |
3364 | ||
b805da74 AR |
3365 | MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>"); |
3366 | MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \ | |
3367 | "Copyright 2000,2008 IBM Corporation\n"); | |
3368 | MODULE_LICENSE("GPL"); |