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Commit | Line | Data |
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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; | |
ec634fe3 PM |
353 | else |
354 | rc = NETDEV_TX_OK; | |
1da177e4 LT |
355 | return rc; |
356 | } /* end of claw_tx */ | |
357 | ||
358 | /*------------------------------------------------------------------* | |
359 | * pack the collect queue into an skb and return it * | |
360 | * If not packing just return the top skb from the queue * | |
361 | *------------------------------------------------------------------*/ | |
362 | ||
363 | static struct sk_buff * | |
364 | claw_pack_skb(struct claw_privbk *privptr) | |
365 | { | |
366 | struct sk_buff *new_skb,*held_skb; | |
367 | struct chbk *p_ch = &privptr->channel[WRITE]; | |
368 | struct claw_env *p_env = privptr->p_env; | |
369 | int pkt_cnt,pk_ind,so_far; | |
370 | ||
371 | new_skb = NULL; /* assume no dice */ | |
372 | pkt_cnt = 0; | |
b805da74 | 373 | CLAW_DBF_TEXT(4, trace, "PackSKBe"); |
b03efcfb | 374 | if (!skb_queue_empty(&p_ch->collect_queue)) { |
1da177e4 LT |
375 | /* some data */ |
376 | held_skb = skb_dequeue(&p_ch->collect_queue); | |
1da177e4 | 377 | if (held_skb) |
8e84c801 | 378 | dev_kfree_skb_any(held_skb); |
1da177e4 LT |
379 | else |
380 | return NULL; | |
8e84c801 FP |
381 | if (p_env->packing != DO_PACKED) |
382 | return held_skb; | |
1da177e4 LT |
383 | /* get a new SKB we will pack at least one */ |
384 | new_skb = dev_alloc_skb(p_env->write_size); | |
385 | if (new_skb == NULL) { | |
386 | atomic_inc(&held_skb->users); | |
387 | skb_queue_head(&p_ch->collect_queue,held_skb); | |
388 | return NULL; | |
389 | } | |
390 | /* we have packed packet and a place to put it */ | |
391 | pk_ind = 1; | |
392 | so_far = 0; | |
393 | new_skb->cb[1] = 'P'; /* every skb on queue has pack header */ | |
394 | while ((pk_ind) && (held_skb != NULL)) { | |
395 | if (held_skb->len+so_far <= p_env->write_size-8) { | |
396 | memcpy(skb_put(new_skb,held_skb->len), | |
397 | held_skb->data,held_skb->len); | |
398 | privptr->stats.tx_packets++; | |
399 | so_far += held_skb->len; | |
400 | pkt_cnt++; | |
8e84c801 | 401 | dev_kfree_skb_any(held_skb); |
1da177e4 LT |
402 | held_skb = skb_dequeue(&p_ch->collect_queue); |
403 | if (held_skb) | |
404 | atomic_dec(&held_skb->users); | |
405 | } else { | |
406 | pk_ind = 0; | |
407 | atomic_inc(&held_skb->users); | |
408 | skb_queue_head(&p_ch->collect_queue,held_skb); | |
409 | } | |
410 | } | |
1da177e4 | 411 | } |
b805da74 | 412 | CLAW_DBF_TEXT(4, trace, "PackSKBx"); |
1da177e4 LT |
413 | return new_skb; |
414 | } | |
415 | ||
416 | /*-------------------------------------------------------------------* | |
417 | * claw_change_mtu * | |
418 | * * | |
419 | *-------------------------------------------------------------------*/ | |
420 | ||
421 | static int | |
422 | claw_change_mtu(struct net_device *dev, int new_mtu) | |
423 | { | |
6951df34 | 424 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 | 425 | int buff_size; |
b805da74 | 426 | CLAW_DBF_TEXT(4, trace, "setmtu"); |
1da177e4 LT |
427 | buff_size = privptr->p_env->write_size; |
428 | if ((new_mtu < 60) || (new_mtu > buff_size)) { | |
1da177e4 LT |
429 | return -EINVAL; |
430 | } | |
431 | dev->mtu = new_mtu; | |
1da177e4 LT |
432 | return 0; |
433 | } /* end of claw_change_mtu */ | |
434 | ||
435 | ||
436 | /*-------------------------------------------------------------------* | |
437 | * claw_open * | |
438 | * * | |
439 | *-------------------------------------------------------------------*/ | |
440 | static int | |
441 | claw_open(struct net_device *dev) | |
442 | { | |
443 | ||
444 | int rc; | |
445 | int i; | |
446 | unsigned long saveflags=0; | |
447 | unsigned long parm; | |
448 | struct claw_privbk *privptr; | |
449 | DECLARE_WAITQUEUE(wait, current); | |
450 | struct timer_list timer; | |
451 | struct ccwbk *p_buf; | |
452 | ||
b805da74 | 453 | CLAW_DBF_TEXT(4, trace, "open"); |
6951df34 | 454 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
455 | /* allocate and initialize CCW blocks */ |
456 | if (privptr->buffs_alloc == 0) { | |
457 | rc=init_ccw_bk(dev); | |
458 | if (rc) { | |
b805da74 | 459 | CLAW_DBF_TEXT(2, trace, "openmem"); |
1da177e4 LT |
460 | return -ENOMEM; |
461 | } | |
462 | } | |
463 | privptr->system_validate_comp=0; | |
464 | privptr->release_pend=0; | |
465 | if(strncmp(privptr->p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { | |
466 | privptr->p_env->read_size=DEF_PACK_BUFSIZE; | |
467 | privptr->p_env->write_size=DEF_PACK_BUFSIZE; | |
468 | privptr->p_env->packing=PACKING_ASK; | |
469 | } else { | |
470 | privptr->p_env->packing=0; | |
471 | privptr->p_env->read_size=CLAW_FRAME_SIZE; | |
472 | privptr->p_env->write_size=CLAW_FRAME_SIZE; | |
473 | } | |
474 | claw_set_busy(dev); | |
475 | tasklet_init(&privptr->channel[READ].tasklet, claw_irq_tasklet, | |
476 | (unsigned long) &privptr->channel[READ]); | |
477 | for ( i = 0; i < 2; i++) { | |
b805da74 | 478 | CLAW_DBF_TEXT_(2, trace, "opn_ch%d", i); |
1da177e4 LT |
479 | init_waitqueue_head(&privptr->channel[i].wait); |
480 | /* skb_queue_head_init(&p_ch->io_queue); */ | |
481 | if (i == WRITE) | |
482 | skb_queue_head_init( | |
483 | &privptr->channel[WRITE].collect_queue); | |
484 | privptr->channel[i].flag_a = 0; | |
485 | privptr->channel[i].IO_active = 0; | |
486 | privptr->channel[i].flag &= ~CLAW_TIMER; | |
487 | init_timer(&timer); | |
488 | timer.function = (void *)claw_timer; | |
489 | timer.data = (unsigned long)(&privptr->channel[i]); | |
490 | timer.expires = jiffies + 15*HZ; | |
491 | add_timer(&timer); | |
492 | spin_lock_irqsave(get_ccwdev_lock( | |
493 | privptr->channel[i].cdev), saveflags); | |
494 | parm = (unsigned long) &privptr->channel[i]; | |
495 | privptr->channel[i].claw_state = CLAW_START_HALT_IO; | |
496 | rc = 0; | |
497 | add_wait_queue(&privptr->channel[i].wait, &wait); | |
498 | rc = ccw_device_halt( | |
499 | (struct ccw_device *)privptr->channel[i].cdev,parm); | |
500 | set_current_state(TASK_INTERRUPTIBLE); | |
501 | spin_unlock_irqrestore( | |
502 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
503 | schedule(); | |
504 | set_current_state(TASK_RUNNING); | |
505 | remove_wait_queue(&privptr->channel[i].wait, &wait); | |
506 | if(rc != 0) | |
507 | ccw_check_return_code(privptr->channel[i].cdev, rc); | |
508 | if((privptr->channel[i].flag & CLAW_TIMER) == 0x00) | |
509 | del_timer(&timer); | |
510 | } | |
511 | if ((((privptr->channel[READ].last_dstat | | |
512 | privptr->channel[WRITE].last_dstat) & | |
513 | ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) || | |
514 | (((privptr->channel[READ].flag | | |
515 | privptr->channel[WRITE].flag) & CLAW_TIMER) != 0x00)) { | |
4811fcb7 AR |
516 | dev_info(&privptr->channel[READ].cdev->dev, |
517 | "%s: remote side is not ready\n", dev->name); | |
b805da74 | 518 | CLAW_DBF_TEXT(2, trace, "notrdy"); |
1da177e4 LT |
519 | |
520 | for ( i = 0; i < 2; i++) { | |
521 | spin_lock_irqsave( | |
522 | get_ccwdev_lock(privptr->channel[i].cdev), | |
523 | saveflags); | |
524 | parm = (unsigned long) &privptr->channel[i]; | |
525 | privptr->channel[i].claw_state = CLAW_STOP; | |
526 | rc = ccw_device_halt( | |
527 | (struct ccw_device *)&privptr->channel[i].cdev, | |
528 | parm); | |
529 | spin_unlock_irqrestore( | |
530 | get_ccwdev_lock(privptr->channel[i].cdev), | |
531 | saveflags); | |
532 | if (rc != 0) { | |
533 | ccw_check_return_code( | |
534 | privptr->channel[i].cdev, rc); | |
535 | } | |
536 | } | |
537 | free_pages((unsigned long)privptr->p_buff_ccw, | |
538 | (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); | |
539 | if (privptr->p_env->read_size < PAGE_SIZE) { | |
540 | free_pages((unsigned long)privptr->p_buff_read, | |
541 | (int)pages_to_order_of_mag( | |
542 | privptr->p_buff_read_num)); | |
543 | } | |
544 | else { | |
545 | p_buf=privptr->p_read_active_first; | |
546 | while (p_buf!=NULL) { | |
547 | free_pages((unsigned long)p_buf->p_buffer, | |
548 | (int)pages_to_order_of_mag( | |
549 | privptr->p_buff_pages_perread )); | |
550 | p_buf=p_buf->next; | |
551 | } | |
552 | } | |
553 | if (privptr->p_env->write_size < PAGE_SIZE ) { | |
554 | free_pages((unsigned long)privptr->p_buff_write, | |
555 | (int)pages_to_order_of_mag( | |
556 | privptr->p_buff_write_num)); | |
557 | } | |
558 | else { | |
559 | p_buf=privptr->p_write_active_first; | |
560 | while (p_buf!=NULL) { | |
561 | free_pages((unsigned long)p_buf->p_buffer, | |
562 | (int)pages_to_order_of_mag( | |
563 | privptr->p_buff_pages_perwrite )); | |
564 | p_buf=p_buf->next; | |
565 | } | |
566 | } | |
567 | privptr->buffs_alloc = 0; | |
568 | privptr->channel[READ].flag= 0x00; | |
569 | privptr->channel[WRITE].flag = 0x00; | |
570 | privptr->p_buff_ccw=NULL; | |
571 | privptr->p_buff_read=NULL; | |
572 | privptr->p_buff_write=NULL; | |
573 | claw_clear_busy(dev); | |
b805da74 | 574 | CLAW_DBF_TEXT(2, trace, "open EIO"); |
1da177e4 LT |
575 | return -EIO; |
576 | } | |
577 | ||
578 | /* Send SystemValidate command */ | |
579 | ||
580 | claw_clear_busy(dev); | |
b805da74 | 581 | CLAW_DBF_TEXT(4, trace, "openok"); |
1da177e4 LT |
582 | return 0; |
583 | } /* end of claw_open */ | |
584 | ||
585 | /*-------------------------------------------------------------------* | |
586 | * * | |
587 | * claw_irq_handler * | |
588 | * * | |
589 | *--------------------------------------------------------------------*/ | |
590 | static void | |
591 | claw_irq_handler(struct ccw_device *cdev, | |
592 | unsigned long intparm, struct irb *irb) | |
593 | { | |
594 | struct chbk *p_ch = NULL; | |
595 | struct claw_privbk *privptr = NULL; | |
596 | struct net_device *dev = NULL; | |
597 | struct claw_env *p_env; | |
598 | struct chbk *p_ch_r=NULL; | |
599 | ||
b805da74 | 600 | CLAW_DBF_TEXT(4, trace, "clawirq"); |
1da177e4 | 601 | /* Bypass all 'unsolicited interrupts' */ |
dff59b64 GKH |
602 | privptr = dev_get_drvdata(&cdev->dev); |
603 | if (!privptr) { | |
4811fcb7 AR |
604 | dev_warn(&cdev->dev, "An uninitialized CLAW device received an" |
605 | " IRQ, c-%02x d-%02x\n", | |
606 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat); | |
b805da74 | 607 | CLAW_DBF_TEXT(2, trace, "badirq"); |
1da177e4 LT |
608 | return; |
609 | } | |
1da177e4 LT |
610 | |
611 | /* Try to extract channel from driver data. */ | |
612 | if (privptr->channel[READ].cdev == cdev) | |
613 | p_ch = &privptr->channel[READ]; | |
614 | else if (privptr->channel[WRITE].cdev == cdev) | |
615 | p_ch = &privptr->channel[WRITE]; | |
616 | else { | |
4811fcb7 | 617 | dev_warn(&cdev->dev, "The device is not a CLAW device\n"); |
b805da74 | 618 | CLAW_DBF_TEXT(2, trace, "badchan"); |
1da177e4 LT |
619 | return; |
620 | } | |
b805da74 | 621 | CLAW_DBF_TEXT_(4, trace, "IRQCH=%d", p_ch->flag); |
1da177e4 LT |
622 | |
623 | dev = (struct net_device *) (p_ch->ndev); | |
624 | p_env=privptr->p_env; | |
625 | ||
1da177e4 LT |
626 | /* Copy interruption response block. */ |
627 | memcpy(p_ch->irb, irb, sizeof(struct irb)); | |
628 | ||
b805da74 | 629 | /* Check for good subchannel return code, otherwise info message */ |
23d805b6 | 630 | if (irb->scsw.cmd.cstat && !(irb->scsw.cmd.cstat & SCHN_STAT_PCI)) { |
4811fcb7 AR |
631 | dev_info(&cdev->dev, |
632 | "%s: subchannel check for device: %04x -" | |
1da177e4 LT |
633 | " Sch Stat %02x Dev Stat %02x CPA - %04x\n", |
634 | dev->name, p_ch->devno, | |
23d805b6 PO |
635 | irb->scsw.cmd.cstat, irb->scsw.cmd.dstat, |
636 | irb->scsw.cmd.cpa); | |
b805da74 | 637 | CLAW_DBF_TEXT(2, trace, "chanchk"); |
1da177e4 LT |
638 | /* return; */ |
639 | } | |
640 | ||
641 | /* Check the reason-code of a unit check */ | |
23d805b6 | 642 | if (irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) |
1da177e4 | 643 | ccw_check_unit_check(p_ch, irb->ecw[0]); |
1da177e4 LT |
644 | |
645 | /* State machine to bring the connection up, down and to restart */ | |
23d805b6 | 646 | p_ch->last_dstat = irb->scsw.cmd.dstat; |
1da177e4 LT |
647 | |
648 | switch (p_ch->claw_state) { | |
b805da74 AR |
649 | case CLAW_STOP:/* HALT_IO by claw_release (halt sequence) */ |
650 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
651 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
652 | (p_ch->irb->scsw.cmd.stctl == | |
653 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) | |
654 | return; | |
655 | wake_up(&p_ch->wait); /* wake up claw_release */ | |
656 | CLAW_DBF_TEXT(4, trace, "stop"); | |
657 | return; | |
658 | case CLAW_START_HALT_IO: /* HALT_IO issued by claw_open */ | |
659 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
660 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
661 | (p_ch->irb->scsw.cmd.stctl == | |
662 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
663 | CLAW_DBF_TEXT(4, trace, "haltio"); | |
664 | return; | |
665 | } | |
666 | if (p_ch->flag == CLAW_READ) { | |
667 | p_ch->claw_state = CLAW_START_READ; | |
668 | wake_up(&p_ch->wait); /* wake claw_open (READ)*/ | |
669 | } else if (p_ch->flag == CLAW_WRITE) { | |
670 | p_ch->claw_state = CLAW_START_WRITE; | |
4811fcb7 | 671 | /* send SYSTEM_VALIDATE */ |
b805da74 AR |
672 | claw_strt_read(dev, LOCK_NO); |
673 | claw_send_control(dev, | |
674 | SYSTEM_VALIDATE_REQUEST, | |
675 | 0, 0, 0, | |
676 | p_env->host_name, | |
677 | p_env->adapter_name); | |
678 | } else { | |
4811fcb7 AR |
679 | dev_warn(&cdev->dev, "The CLAW device received" |
680 | " an unexpected IRQ, " | |
681 | "c-%02x d-%02x\n", | |
b805da74 AR |
682 | irb->scsw.cmd.cstat, |
683 | irb->scsw.cmd.dstat); | |
684 | return; | |
685 | } | |
686 | CLAW_DBF_TEXT(4, trace, "haltio"); | |
687 | return; | |
688 | case CLAW_START_READ: | |
689 | CLAW_DBF_TEXT(4, trace, "ReadIRQ"); | |
690 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
691 | clear_bit(0, (void *)&p_ch->IO_active); | |
692 | if ((p_ch->irb->ecw[0] & 0x41) == 0x41 || | |
693 | (p_ch->irb->ecw[0] & 0x40) == 0x40 || | |
694 | (p_ch->irb->ecw[0]) == 0) { | |
695 | privptr->stats.rx_errors++; | |
4811fcb7 AR |
696 | dev_info(&cdev->dev, |
697 | "%s: Restart is required after remote " | |
b805da74 AR |
698 | "side recovers \n", |
699 | dev->name); | |
700 | } | |
701 | CLAW_DBF_TEXT(4, trace, "notrdy"); | |
702 | return; | |
703 | } | |
704 | if ((p_ch->irb->scsw.cmd.cstat & SCHN_STAT_PCI) && | |
705 | (p_ch->irb->scsw.cmd.dstat == 0)) { | |
706 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
707 | (void *)&p_ch->flag_a) == 0) | |
708 | tasklet_schedule(&p_ch->tasklet); | |
1da177e4 | 709 | else |
b805da74 AR |
710 | CLAW_DBF_TEXT(4, trace, "PCINoBH"); |
711 | CLAW_DBF_TEXT(4, trace, "PCI_read"); | |
712 | return; | |
713 | } | |
714 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
715 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
716 | (p_ch->irb->scsw.cmd.stctl == | |
717 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
718 | CLAW_DBF_TEXT(4, trace, "SPend_rd"); | |
719 | return; | |
720 | } | |
721 | clear_bit(0, (void *)&p_ch->IO_active); | |
722 | claw_clearbit_busy(TB_RETRY, dev); | |
723 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
724 | (void *)&p_ch->flag_a) == 0) | |
725 | tasklet_schedule(&p_ch->tasklet); | |
726 | else | |
727 | CLAW_DBF_TEXT(4, trace, "RdBHAct"); | |
728 | CLAW_DBF_TEXT(4, trace, "RdIRQXit"); | |
729 | return; | |
730 | case CLAW_START_WRITE: | |
731 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_CHECK) { | |
4811fcb7 AR |
732 | dev_info(&cdev->dev, |
733 | "%s: Unit Check Occured in " | |
b805da74 AR |
734 | "write channel\n", dev->name); |
735 | clear_bit(0, (void *)&p_ch->IO_active); | |
736 | if (p_ch->irb->ecw[0] & 0x80) { | |
4811fcb7 AR |
737 | dev_info(&cdev->dev, |
738 | "%s: Resetting Event " | |
b805da74 AR |
739 | "occurred:\n", dev->name); |
740 | init_timer(&p_ch->timer); | |
741 | p_ch->timer.function = | |
742 | (void *)claw_write_retry; | |
743 | p_ch->timer.data = (unsigned long)p_ch; | |
744 | p_ch->timer.expires = jiffies + 10*HZ; | |
745 | add_timer(&p_ch->timer); | |
4811fcb7 AR |
746 | dev_info(&cdev->dev, |
747 | "%s: write connection " | |
b805da74 AR |
748 | "restarting\n", dev->name); |
749 | } | |
750 | CLAW_DBF_TEXT(4, trace, "rstrtwrt"); | |
751 | return; | |
752 | } | |
753 | if (p_ch->irb->scsw.cmd.dstat & DEV_STAT_UNIT_EXCEP) { | |
754 | clear_bit(0, (void *)&p_ch->IO_active); | |
4811fcb7 AR |
755 | dev_info(&cdev->dev, |
756 | "%s: Unit Exception " | |
757 | "occurred in write channel\n", | |
758 | dev->name); | |
b805da74 AR |
759 | } |
760 | if (!((p_ch->irb->scsw.cmd.stctl & SCSW_STCTL_SEC_STATUS) || | |
761 | (p_ch->irb->scsw.cmd.stctl == SCSW_STCTL_STATUS_PEND) || | |
762 | (p_ch->irb->scsw.cmd.stctl == | |
763 | (SCSW_STCTL_ALERT_STATUS | SCSW_STCTL_STATUS_PEND)))) { | |
764 | CLAW_DBF_TEXT(4, trace, "writeUE"); | |
765 | return; | |
766 | } | |
767 | clear_bit(0, (void *)&p_ch->IO_active); | |
768 | if (claw_test_and_setbit_busy(TB_TX, dev) == 0) { | |
769 | claw_write_next(p_ch); | |
770 | claw_clearbit_busy(TB_TX, dev); | |
771 | claw_clear_busy(dev); | |
772 | } | |
773 | p_ch_r = (struct chbk *)&privptr->channel[READ]; | |
774 | if (test_and_set_bit(CLAW_BH_ACTIVE, | |
775 | (void *)&p_ch_r->flag_a) == 0) | |
776 | tasklet_schedule(&p_ch_r->tasklet); | |
777 | CLAW_DBF_TEXT(4, trace, "StWtExit"); | |
778 | return; | |
779 | default: | |
4811fcb7 AR |
780 | dev_warn(&cdev->dev, |
781 | "The CLAW device for %s received an unexpected IRQ\n", | |
782 | dev->name); | |
b805da74 AR |
783 | CLAW_DBF_TEXT(2, trace, "badIRQ"); |
784 | return; | |
1da177e4 LT |
785 | } |
786 | ||
787 | } /* end of claw_irq_handler */ | |
788 | ||
789 | ||
790 | /*-------------------------------------------------------------------* | |
791 | * claw_irq_tasklet * | |
792 | * * | |
793 | *--------------------------------------------------------------------*/ | |
794 | static void | |
795 | claw_irq_tasklet ( unsigned long data ) | |
796 | { | |
797 | struct chbk * p_ch; | |
798 | struct net_device *dev; | |
799 | struct claw_privbk * privptr; | |
800 | ||
801 | p_ch = (struct chbk *) data; | |
802 | dev = (struct net_device *)p_ch->ndev; | |
b805da74 | 803 | CLAW_DBF_TEXT(4, trace, "IRQtask"); |
6951df34 | 804 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
805 | unpack_read(dev); |
806 | clear_bit(CLAW_BH_ACTIVE, (void *)&p_ch->flag_a); | |
b805da74 | 807 | CLAW_DBF_TEXT(4, trace, "TskletXt"); |
1da177e4 LT |
808 | return; |
809 | } /* end of claw_irq_bh */ | |
810 | ||
811 | /*-------------------------------------------------------------------* | |
812 | * claw_release * | |
813 | * * | |
814 | *--------------------------------------------------------------------*/ | |
815 | static int | |
816 | claw_release(struct net_device *dev) | |
817 | { | |
818 | int rc; | |
819 | int i; | |
820 | unsigned long saveflags; | |
821 | unsigned long parm; | |
822 | struct claw_privbk *privptr; | |
823 | DECLARE_WAITQUEUE(wait, current); | |
824 | struct ccwbk* p_this_ccw; | |
825 | struct ccwbk* p_buf; | |
826 | ||
827 | if (!dev) | |
828 | return 0; | |
6951df34 | 829 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
830 | if (!privptr) |
831 | return 0; | |
b805da74 | 832 | CLAW_DBF_TEXT(4, trace, "release"); |
1da177e4 LT |
833 | privptr->release_pend=1; |
834 | claw_setbit_busy(TB_STOP,dev); | |
835 | for ( i = 1; i >=0 ; i--) { | |
836 | spin_lock_irqsave( | |
837 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
838 | /* del_timer(&privptr->channel[READ].timer); */ | |
839 | privptr->channel[i].claw_state = CLAW_STOP; | |
840 | privptr->channel[i].IO_active = 0; | |
841 | parm = (unsigned long) &privptr->channel[i]; | |
842 | if (i == WRITE) | |
843 | claw_purge_skb_queue( | |
844 | &privptr->channel[WRITE].collect_queue); | |
845 | rc = ccw_device_halt (privptr->channel[i].cdev, parm); | |
846 | if (privptr->system_validate_comp==0x00) /* never opened? */ | |
847 | init_waitqueue_head(&privptr->channel[i].wait); | |
848 | add_wait_queue(&privptr->channel[i].wait, &wait); | |
849 | set_current_state(TASK_INTERRUPTIBLE); | |
850 | spin_unlock_irqrestore( | |
851 | get_ccwdev_lock(privptr->channel[i].cdev), saveflags); | |
852 | schedule(); | |
853 | set_current_state(TASK_RUNNING); | |
854 | remove_wait_queue(&privptr->channel[i].wait, &wait); | |
855 | if (rc != 0) { | |
856 | ccw_check_return_code(privptr->channel[i].cdev, rc); | |
857 | } | |
858 | } | |
859 | if (privptr->pk_skb != NULL) { | |
8e84c801 | 860 | dev_kfree_skb_any(privptr->pk_skb); |
1da177e4 LT |
861 | privptr->pk_skb = NULL; |
862 | } | |
863 | if(privptr->buffs_alloc != 1) { | |
b805da74 | 864 | CLAW_DBF_TEXT(4, trace, "none2fre"); |
1da177e4 LT |
865 | return 0; |
866 | } | |
b805da74 | 867 | CLAW_DBF_TEXT(4, trace, "freebufs"); |
1da177e4 LT |
868 | if (privptr->p_buff_ccw != NULL) { |
869 | free_pages((unsigned long)privptr->p_buff_ccw, | |
870 | (int)pages_to_order_of_mag(privptr->p_buff_ccw_num)); | |
871 | } | |
b805da74 | 872 | CLAW_DBF_TEXT(4, trace, "freeread"); |
1da177e4 LT |
873 | if (privptr->p_env->read_size < PAGE_SIZE) { |
874 | if (privptr->p_buff_read != NULL) { | |
875 | free_pages((unsigned long)privptr->p_buff_read, | |
876 | (int)pages_to_order_of_mag(privptr->p_buff_read_num)); | |
877 | } | |
878 | } | |
879 | else { | |
880 | p_buf=privptr->p_read_active_first; | |
881 | while (p_buf!=NULL) { | |
882 | free_pages((unsigned long)p_buf->p_buffer, | |
883 | (int)pages_to_order_of_mag( | |
884 | privptr->p_buff_pages_perread )); | |
885 | p_buf=p_buf->next; | |
886 | } | |
887 | } | |
b805da74 | 888 | CLAW_DBF_TEXT(4, trace, "freewrit"); |
1da177e4 LT |
889 | if (privptr->p_env->write_size < PAGE_SIZE ) { |
890 | free_pages((unsigned long)privptr->p_buff_write, | |
891 | (int)pages_to_order_of_mag(privptr->p_buff_write_num)); | |
892 | } | |
893 | else { | |
894 | p_buf=privptr->p_write_active_first; | |
895 | while (p_buf!=NULL) { | |
896 | free_pages((unsigned long)p_buf->p_buffer, | |
897 | (int)pages_to_order_of_mag( | |
898 | privptr->p_buff_pages_perwrite )); | |
899 | p_buf=p_buf->next; | |
900 | } | |
901 | } | |
b805da74 | 902 | CLAW_DBF_TEXT(4, trace, "clearptr"); |
1da177e4 LT |
903 | privptr->buffs_alloc = 0; |
904 | privptr->p_buff_ccw=NULL; | |
905 | privptr->p_buff_read=NULL; | |
906 | privptr->p_buff_write=NULL; | |
907 | privptr->system_validate_comp=0; | |
908 | privptr->release_pend=0; | |
909 | /* Remove any writes that were pending and reset all reads */ | |
910 | p_this_ccw=privptr->p_read_active_first; | |
911 | while (p_this_ccw!=NULL) { | |
912 | p_this_ccw->header.length=0xffff; | |
913 | p_this_ccw->header.opcode=0xff; | |
914 | p_this_ccw->header.flag=0x00; | |
915 | p_this_ccw=p_this_ccw->next; | |
916 | } | |
917 | ||
918 | while (privptr->p_write_active_first!=NULL) { | |
919 | p_this_ccw=privptr->p_write_active_first; | |
920 | p_this_ccw->header.flag=CLAW_PENDING; | |
921 | privptr->p_write_active_first=p_this_ccw->next; | |
922 | p_this_ccw->next=privptr->p_write_free_chain; | |
923 | privptr->p_write_free_chain=p_this_ccw; | |
924 | ++privptr->write_free_count; | |
925 | } | |
926 | privptr->p_write_active_last=NULL; | |
927 | privptr->mtc_logical_link = -1; | |
928 | privptr->mtc_skipping = 1; | |
929 | privptr->mtc_offset=0; | |
930 | ||
931 | if (((privptr->channel[READ].last_dstat | | |
932 | privptr->channel[WRITE].last_dstat) & | |
933 | ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) != 0x00) { | |
4811fcb7 AR |
934 | dev_warn(&privptr->channel[READ].cdev->dev, |
935 | "Deactivating %s completed with incorrect" | |
936 | " subchannel status " | |
937 | "(read %02x, write %02x)\n", | |
1da177e4 LT |
938 | dev->name, |
939 | privptr->channel[READ].last_dstat, | |
940 | privptr->channel[WRITE].last_dstat); | |
b805da74 | 941 | CLAW_DBF_TEXT(2, trace, "badclose"); |
1da177e4 | 942 | } |
b805da74 | 943 | CLAW_DBF_TEXT(4, trace, "rlsexit"); |
1da177e4 LT |
944 | return 0; |
945 | } /* end of claw_release */ | |
946 | ||
1da177e4 LT |
947 | /*-------------------------------------------------------------------* |
948 | * claw_write_retry * | |
949 | * * | |
950 | *--------------------------------------------------------------------*/ | |
951 | ||
952 | static void | |
953 | claw_write_retry ( struct chbk *p_ch ) | |
954 | { | |
955 | ||
956 | struct net_device *dev=p_ch->ndev; | |
957 | ||
b805da74 | 958 | CLAW_DBF_TEXT(4, trace, "w_retry"); |
1da177e4 | 959 | if (p_ch->claw_state == CLAW_STOP) { |
1da177e4 LT |
960 | return; |
961 | } | |
1da177e4 | 962 | claw_strt_out_IO( dev ); |
b805da74 | 963 | CLAW_DBF_TEXT(4, trace, "rtry_xit"); |
1da177e4 LT |
964 | return; |
965 | } /* end of claw_write_retry */ | |
966 | ||
967 | ||
968 | /*-------------------------------------------------------------------* | |
969 | * claw_write_next * | |
970 | * * | |
971 | *--------------------------------------------------------------------*/ | |
972 | ||
973 | static void | |
974 | claw_write_next ( struct chbk * p_ch ) | |
975 | { | |
976 | ||
977 | struct net_device *dev; | |
978 | struct claw_privbk *privptr=NULL; | |
979 | struct sk_buff *pk_skb; | |
980 | int rc; | |
981 | ||
b805da74 | 982 | CLAW_DBF_TEXT(4, trace, "claw_wrt"); |
1da177e4 LT |
983 | if (p_ch->claw_state == CLAW_STOP) |
984 | return; | |
985 | dev = (struct net_device *) p_ch->ndev; | |
6951df34 | 986 | privptr = (struct claw_privbk *) dev->ml_priv; |
1da177e4 LT |
987 | claw_free_wrt_buf( dev ); |
988 | if ((privptr->write_free_count > 0) && | |
b03efcfb | 989 | !skb_queue_empty(&p_ch->collect_queue)) { |
1da177e4 LT |
990 | pk_skb = claw_pack_skb(privptr); |
991 | while (pk_skb != NULL) { | |
992 | rc = claw_hw_tx( pk_skb, dev,1); | |
993 | if (privptr->write_free_count > 0) { | |
994 | pk_skb = claw_pack_skb(privptr); | |
995 | } else | |
996 | pk_skb = NULL; | |
997 | } | |
998 | } | |
999 | if (privptr->p_write_active_first!=NULL) { | |
1000 | claw_strt_out_IO(dev); | |
1001 | } | |
1da177e4 LT |
1002 | return; |
1003 | } /* end of claw_write_next */ | |
1004 | ||
1005 | /*-------------------------------------------------------------------* | |
1006 | * * | |
1007 | * claw_timer * | |
1008 | *--------------------------------------------------------------------*/ | |
1009 | ||
1010 | static void | |
1011 | claw_timer ( struct chbk * p_ch ) | |
1012 | { | |
b805da74 | 1013 | CLAW_DBF_TEXT(4, trace, "timer"); |
1da177e4 LT |
1014 | p_ch->flag |= CLAW_TIMER; |
1015 | wake_up(&p_ch->wait); | |
1da177e4 LT |
1016 | return; |
1017 | } /* end of claw_timer */ | |
1018 | ||
1da177e4 LT |
1019 | /* |
1020 | * | |
1021 | * functions | |
1022 | */ | |
1023 | ||
1024 | ||
1025 | /*-------------------------------------------------------------------* | |
1026 | * * | |
1027 | * pages_to_order_of_mag * | |
1028 | * * | |
1029 | * takes a number of pages from 1 to 512 and returns the * | |
1030 | * log(num_pages)/log(2) get_free_pages() needs a base 2 order * | |
1031 | * of magnitude get_free_pages() has an upper order of 9 * | |
1032 | *--------------------------------------------------------------------*/ | |
1033 | ||
4d284cac | 1034 | static int |
1da177e4 LT |
1035 | pages_to_order_of_mag(int num_of_pages) |
1036 | { | |
1037 | int order_of_mag=1; /* assume 2 pages */ | |
b9d2fcee | 1038 | int nump; |
b805da74 AR |
1039 | |
1040 | CLAW_DBF_TEXT_(5, trace, "pages%d", num_of_pages); | |
1da177e4 LT |
1041 | if (num_of_pages == 1) {return 0; } /* magnitude of 0 = 1 page */ |
1042 | /* 512 pages = 2Meg on 4k page systems */ | |
1043 | if (num_of_pages >= 512) {return 9; } | |
1044 | /* we have two or more pages order is at least 1 */ | |
1045 | for (nump=2 ;nump <= 512;nump*=2) { | |
1046 | if (num_of_pages <= nump) | |
1047 | break; | |
1048 | order_of_mag +=1; | |
1049 | } | |
1050 | if (order_of_mag > 9) { order_of_mag = 9; } /* I know it's paranoid */ | |
b805da74 | 1051 | CLAW_DBF_TEXT_(5, trace, "mag%d", order_of_mag); |
1da177e4 LT |
1052 | return order_of_mag; |
1053 | } | |
1054 | ||
1055 | /*-------------------------------------------------------------------* | |
1056 | * * | |
1057 | * add_claw_reads * | |
1058 | * * | |
1059 | *--------------------------------------------------------------------*/ | |
1060 | static int | |
1061 | add_claw_reads(struct net_device *dev, struct ccwbk* p_first, | |
1062 | struct ccwbk* p_last) | |
1063 | { | |
1064 | struct claw_privbk *privptr; | |
1065 | struct ccw1 temp_ccw; | |
1066 | struct endccw * p_end; | |
b805da74 | 1067 | CLAW_DBF_TEXT(4, trace, "addreads"); |
6951df34 | 1068 | privptr = dev->ml_priv; |
1da177e4 LT |
1069 | p_end = privptr->p_end_ccw; |
1070 | ||
1071 | /* first CCW and last CCW contains a new set of read channel programs | |
1072 | * to apend the running channel programs | |
1073 | */ | |
1074 | if ( p_first==NULL) { | |
b805da74 | 1075 | CLAW_DBF_TEXT(4, trace, "addexit"); |
1da177e4 LT |
1076 | return 0; |
1077 | } | |
1078 | ||
1079 | /* set up ending CCW sequence for this segment */ | |
1080 | if (p_end->read1) { | |
1081 | p_end->read1=0x00; /* second ending CCW is now active */ | |
1082 | /* reset ending CCWs and setup TIC CCWs */ | |
1083 | p_end->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1084 | p_end->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1085 | p_last->r_TIC_1.cda =(__u32)__pa(&p_end->read2_nop1); | |
1086 | p_last->r_TIC_2.cda =(__u32)__pa(&p_end->read2_nop1); | |
1087 | p_end->read2_nop2.cda=0; | |
1088 | p_end->read2_nop2.count=1; | |
1089 | } | |
1090 | else { | |
1091 | p_end->read1=0x01; /* first ending CCW is now active */ | |
1092 | /* reset ending CCWs and setup TIC CCWs */ | |
1093 | p_end->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1094 | p_end->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1095 | p_last->r_TIC_1.cda = (__u32)__pa(&p_end->read1_nop1); | |
1096 | p_last->r_TIC_2.cda = (__u32)__pa(&p_end->read1_nop1); | |
1097 | p_end->read1_nop2.cda=0; | |
1098 | p_end->read1_nop2.count=1; | |
1099 | } | |
1100 | ||
1101 | if ( privptr-> p_read_active_first ==NULL ) { | |
4811fcb7 AR |
1102 | privptr->p_read_active_first = p_first; /* set new first */ |
1103 | privptr->p_read_active_last = p_last; /* set new last */ | |
1da177e4 LT |
1104 | } |
1105 | else { | |
1106 | ||
1da177e4 LT |
1107 | /* set up TIC ccw */ |
1108 | temp_ccw.cda= (__u32)__pa(&p_first->read); | |
1109 | temp_ccw.count=0; | |
1110 | temp_ccw.flags=0; | |
1111 | temp_ccw.cmd_code = CCW_CLAW_CMD_TIC; | |
1112 | ||
1113 | ||
1114 | if (p_end->read1) { | |
1115 | ||
1116 | /* first set of CCW's is chained to the new read */ | |
1117 | /* chain, so the second set is chained to the active chain. */ | |
1118 | /* Therefore modify the second set to point to the new */ | |
1119 | /* read chain set up TIC CCWs */ | |
1120 | /* make sure we update the CCW so channel doesn't fetch it */ | |
1121 | /* when it's only half done */ | |
1122 | memcpy( &p_end->read2_nop2, &temp_ccw , | |
1123 | sizeof(struct ccw1)); | |
1124 | privptr->p_read_active_last->r_TIC_1.cda= | |
1125 | (__u32)__pa(&p_first->read); | |
1126 | privptr->p_read_active_last->r_TIC_2.cda= | |
1127 | (__u32)__pa(&p_first->read); | |
1128 | } | |
1129 | else { | |
1130 | /* make sure we update the CCW so channel doesn't */ | |
1131 | /* fetch it when it is only half done */ | |
1132 | memcpy( &p_end->read1_nop2, &temp_ccw , | |
1133 | sizeof(struct ccw1)); | |
1134 | privptr->p_read_active_last->r_TIC_1.cda= | |
1135 | (__u32)__pa(&p_first->read); | |
1136 | privptr->p_read_active_last->r_TIC_2.cda= | |
1137 | (__u32)__pa(&p_first->read); | |
1138 | } | |
4811fcb7 | 1139 | /* chain in new set of blocks */ |
1da177e4 LT |
1140 | privptr->p_read_active_last->next = p_first; |
1141 | privptr->p_read_active_last=p_last; | |
1142 | } /* end of if ( privptr-> p_read_active_first ==NULL) */ | |
b805da74 | 1143 | CLAW_DBF_TEXT(4, trace, "addexit"); |
1da177e4 LT |
1144 | return 0; |
1145 | } /* end of add_claw_reads */ | |
1146 | ||
1147 | /*-------------------------------------------------------------------* | |
1148 | * ccw_check_return_code * | |
1149 | * * | |
1150 | *-------------------------------------------------------------------*/ | |
1151 | ||
4d284cac | 1152 | static void |
1da177e4 LT |
1153 | ccw_check_return_code(struct ccw_device *cdev, int return_code) |
1154 | { | |
b805da74 | 1155 | CLAW_DBF_TEXT(4, trace, "ccwret"); |
1da177e4 LT |
1156 | if (return_code != 0) { |
1157 | switch (return_code) { | |
b805da74 AR |
1158 | case -EBUSY: /* BUSY is a transient state no action needed */ |
1159 | break; | |
1160 | case -ENODEV: | |
4811fcb7 AR |
1161 | dev_err(&cdev->dev, "The remote channel adapter is not" |
1162 | " available\n"); | |
b805da74 AR |
1163 | break; |
1164 | case -EINVAL: | |
4811fcb7 AR |
1165 | dev_err(&cdev->dev, |
1166 | "The status of the remote channel adapter" | |
1167 | " is not valid\n"); | |
b805da74 AR |
1168 | break; |
1169 | default: | |
4811fcb7 AR |
1170 | dev_err(&cdev->dev, "The common device layer" |
1171 | " returned error code %d\n", | |
1172 | return_code); | |
b805da74 AR |
1173 | } |
1174 | } | |
1175 | CLAW_DBF_TEXT(4, trace, "ccwret"); | |
1da177e4 LT |
1176 | } /* end of ccw_check_return_code */ |
1177 | ||
1178 | /*-------------------------------------------------------------------* | |
1179 | * ccw_check_unit_check * | |
1180 | *--------------------------------------------------------------------*/ | |
1181 | ||
4d284cac | 1182 | static void |
1da177e4 LT |
1183 | ccw_check_unit_check(struct chbk * p_ch, unsigned char sense ) |
1184 | { | |
b805da74 | 1185 | struct net_device *ndev = p_ch->ndev; |
4811fcb7 | 1186 | struct device *dev = &p_ch->cdev->dev; |
1da177e4 | 1187 | |
b805da74 | 1188 | CLAW_DBF_TEXT(4, trace, "unitchek"); |
4811fcb7 AR |
1189 | dev_warn(dev, "The communication peer of %s disconnected\n", |
1190 | ndev->name); | |
1da177e4 | 1191 | |
b9d2fcee AR |
1192 | if (sense & 0x40) { |
1193 | if (sense & 0x01) { | |
4811fcb7 AR |
1194 | dev_warn(dev, "The remote channel adapter for" |
1195 | " %s has been reset\n", | |
1196 | ndev->name); | |
b9d2fcee AR |
1197 | } |
1198 | } else if (sense & 0x20) { | |
1199 | if (sense & 0x04) { | |
4811fcb7 AR |
1200 | dev_warn(dev, "A data streaming timeout occurred" |
1201 | " for %s\n", | |
1202 | ndev->name); | |
b9d2fcee | 1203 | } else if (sense & 0x10) { |
4811fcb7 AR |
1204 | dev_warn(dev, "The remote channel adapter for %s" |
1205 | " is faulty\n", | |
1206 | ndev->name); | |
b9d2fcee AR |
1207 | } else { |
1208 | dev_warn(dev, "A data transfer parity error occurred" | |
4811fcb7 AR |
1209 | " for %s\n", |
1210 | ndev->name); | |
b9d2fcee AR |
1211 | } |
1212 | } else if (sense & 0x10) { | |
1213 | dev_warn(dev, "A read data parity error occurred" | |
1214 | " for %s\n", | |
1215 | ndev->name); | |
1216 | } | |
1da177e4 | 1217 | |
1da177e4 LT |
1218 | } /* end of ccw_check_unit_check */ |
1219 | ||
1da177e4 LT |
1220 | /*-------------------------------------------------------------------* |
1221 | * find_link * | |
1222 | *--------------------------------------------------------------------*/ | |
1223 | static int | |
1224 | find_link(struct net_device *dev, char *host_name, char *ws_name ) | |
1225 | { | |
1226 | struct claw_privbk *privptr; | |
1227 | struct claw_env *p_env; | |
1228 | int rc=0; | |
1229 | ||
b805da74 | 1230 | CLAW_DBF_TEXT(2, setup, "findlink"); |
6951df34 | 1231 | privptr = dev->ml_priv; |
1da177e4 LT |
1232 | p_env=privptr->p_env; |
1233 | switch (p_env->packing) | |
1234 | { | |
1235 | case PACKING_ASK: | |
1236 | if ((memcmp(WS_APPL_NAME_PACKED, host_name, 8)!=0) || | |
1237 | (memcmp(WS_APPL_NAME_PACKED, ws_name, 8)!=0 )) | |
1238 | rc = EINVAL; | |
1239 | break; | |
1240 | case DO_PACKED: | |
1241 | case PACK_SEND: | |
1242 | if ((memcmp(WS_APPL_NAME_IP_NAME, host_name, 8)!=0) || | |
1243 | (memcmp(WS_APPL_NAME_IP_NAME, ws_name, 8)!=0 )) | |
1244 | rc = EINVAL; | |
1245 | break; | |
1246 | default: | |
1247 | if ((memcmp(HOST_APPL_NAME, host_name, 8)!=0) || | |
1248 | (memcmp(p_env->api_type , ws_name, 8)!=0)) | |
1249 | rc = EINVAL; | |
1250 | break; | |
1251 | } | |
1252 | ||
b9d2fcee | 1253 | return rc; |
1da177e4 LT |
1254 | } /* end of find_link */ |
1255 | ||
1256 | /*-------------------------------------------------------------------* | |
1257 | * claw_hw_tx * | |
1258 | * * | |
1259 | * * | |
1260 | *-------------------------------------------------------------------*/ | |
1261 | ||
1262 | static int | |
1263 | claw_hw_tx(struct sk_buff *skb, struct net_device *dev, long linkid) | |
1264 | { | |
1265 | int rc=0; | |
1266 | struct claw_privbk *privptr; | |
1267 | struct ccwbk *p_this_ccw; | |
1268 | struct ccwbk *p_first_ccw; | |
1269 | struct ccwbk *p_last_ccw; | |
1270 | __u32 numBuffers; | |
1271 | signed long len_of_data; | |
1272 | unsigned long bytesInThisBuffer; | |
1273 | unsigned char *pDataAddress; | |
1274 | struct endccw *pEnd; | |
1275 | struct ccw1 tempCCW; | |
1276 | struct chbk *p_ch; | |
1277 | struct claw_env *p_env; | |
1278 | int lock; | |
1279 | struct clawph *pk_head; | |
1280 | struct chbk *ch; | |
b805da74 AR |
1281 | |
1282 | CLAW_DBF_TEXT(4, trace, "hw_tx"); | |
6951df34 | 1283 | privptr = (struct claw_privbk *)(dev->ml_priv); |
1da177e4 LT |
1284 | p_ch=(struct chbk *)&privptr->channel[WRITE]; |
1285 | p_env =privptr->p_env; | |
1da177e4 LT |
1286 | claw_free_wrt_buf(dev); /* Clean up free chain if posible */ |
1287 | /* scan the write queue to free any completed write packets */ | |
1288 | p_first_ccw=NULL; | |
1289 | p_last_ccw=NULL; | |
1290 | if ((p_env->packing >= PACK_SEND) && | |
1291 | (skb->cb[1] != 'P')) { | |
1292 | skb_push(skb,sizeof(struct clawph)); | |
1293 | pk_head=(struct clawph *)skb->data; | |
1294 | pk_head->len=skb->len-sizeof(struct clawph); | |
1295 | if (pk_head->len%4) { | |
1296 | pk_head->len+= 4-(pk_head->len%4); | |
1297 | skb_pad(skb,4-(pk_head->len%4)); | |
1298 | skb_put(skb,4-(pk_head->len%4)); | |
1299 | } | |
1300 | if (p_env->packing == DO_PACKED) | |
1301 | pk_head->link_num = linkid; | |
1302 | else | |
1303 | pk_head->link_num = 0; | |
1304 | pk_head->flag = 0x00; | |
1305 | skb_pad(skb,4); | |
1306 | skb->cb[1] = 'P'; | |
1307 | } | |
1308 | if (linkid == 0) { | |
1309 | if (claw_check_busy(dev)) { | |
1310 | if (privptr->write_free_count!=0) { | |
1311 | claw_clear_busy(dev); | |
1312 | } | |
1313 | else { | |
1314 | claw_strt_out_IO(dev ); | |
1315 | claw_free_wrt_buf( dev ); | |
1316 | if (privptr->write_free_count==0) { | |
1da177e4 LT |
1317 | ch = &privptr->channel[WRITE]; |
1318 | atomic_inc(&skb->users); | |
1319 | skb_queue_tail(&ch->collect_queue, skb); | |
1320 | goto Done; | |
1321 | } | |
1322 | else { | |
1323 | claw_clear_busy(dev); | |
1324 | } | |
1325 | } | |
1326 | } | |
1327 | /* tx lock */ | |
1328 | if (claw_test_and_setbit_busy(TB_TX,dev)) { /* set to busy */ | |
1da177e4 LT |
1329 | ch = &privptr->channel[WRITE]; |
1330 | atomic_inc(&skb->users); | |
1331 | skb_queue_tail(&ch->collect_queue, skb); | |
1332 | claw_strt_out_IO(dev ); | |
1333 | rc=-EBUSY; | |
1334 | goto Done2; | |
1335 | } | |
1336 | } | |
1337 | /* See how many write buffers are required to hold this data */ | |
f5154fbf | 1338 | numBuffers = DIV_ROUND_UP(skb->len, privptr->p_env->write_size); |
1da177e4 LT |
1339 | |
1340 | /* If that number of buffers isn't available, give up for now */ | |
1341 | if (privptr->write_free_count < numBuffers || | |
1342 | privptr->p_write_free_chain == NULL ) { | |
1343 | ||
1344 | claw_setbit_busy(TB_NOBUFFER,dev); | |
1da177e4 LT |
1345 | ch = &privptr->channel[WRITE]; |
1346 | atomic_inc(&skb->users); | |
1347 | skb_queue_tail(&ch->collect_queue, skb); | |
b805da74 | 1348 | CLAW_DBF_TEXT(2, trace, "clawbusy"); |
1da177e4 LT |
1349 | goto Done2; |
1350 | } | |
1351 | pDataAddress=skb->data; | |
1352 | len_of_data=skb->len; | |
1353 | ||
1354 | while (len_of_data > 0) { | |
1da177e4 LT |
1355 | p_this_ccw=privptr->p_write_free_chain; /* get a block */ |
1356 | if (p_this_ccw == NULL) { /* lost the race */ | |
1357 | ch = &privptr->channel[WRITE]; | |
1358 | atomic_inc(&skb->users); | |
1359 | skb_queue_tail(&ch->collect_queue, skb); | |
1360 | goto Done2; | |
1361 | } | |
1362 | privptr->p_write_free_chain=p_this_ccw->next; | |
1363 | p_this_ccw->next=NULL; | |
1364 | --privptr->write_free_count; /* -1 */ | |
b9d2fcee AR |
1365 | if (len_of_data >= privptr->p_env->write_size) |
1366 | bytesInThisBuffer = privptr->p_env->write_size; | |
1367 | else | |
1368 | bytesInThisBuffer = len_of_data; | |
1da177e4 LT |
1369 | memcpy( p_this_ccw->p_buffer,pDataAddress, bytesInThisBuffer); |
1370 | len_of_data-=bytesInThisBuffer; | |
1371 | pDataAddress+=(unsigned long)bytesInThisBuffer; | |
1372 | /* setup write CCW */ | |
1373 | p_this_ccw->write.cmd_code = (linkid * 8) +1; | |
1374 | if (len_of_data>0) { | |
1375 | p_this_ccw->write.cmd_code+=MORE_to_COME_FLAG; | |
1376 | } | |
1377 | p_this_ccw->write.count=bytesInThisBuffer; | |
1378 | /* now add to end of this chain */ | |
1379 | if (p_first_ccw==NULL) { | |
1380 | p_first_ccw=p_this_ccw; | |
1381 | } | |
1382 | if (p_last_ccw!=NULL) { | |
1383 | p_last_ccw->next=p_this_ccw; | |
1384 | /* set up TIC ccws */ | |
1385 | p_last_ccw->w_TIC_1.cda= | |
1386 | (__u32)__pa(&p_this_ccw->write); | |
1387 | } | |
1388 | p_last_ccw=p_this_ccw; /* save new last block */ | |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | /* FirstCCW and LastCCW now contain a new set of write channel | |
1392 | * programs to append to the running channel program | |
1393 | */ | |
1394 | ||
1395 | if (p_first_ccw!=NULL) { | |
4811fcb7 | 1396 | /* setup ending ccw sequence for this segment */ |
1da177e4 LT |
1397 | pEnd=privptr->p_end_ccw; |
1398 | if (pEnd->write1) { | |
1399 | pEnd->write1=0x00; /* second end ccw is now active */ | |
1400 | /* set up Tic CCWs */ | |
1401 | p_last_ccw->w_TIC_1.cda= | |
1402 | (__u32)__pa(&pEnd->write2_nop1); | |
1403 | pEnd->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1404 | pEnd->write2_nop2.flags = | |
1405 | CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1406 | pEnd->write2_nop2.cda=0; | |
1407 | pEnd->write2_nop2.count=1; | |
1408 | } | |
1409 | else { /* end of if (pEnd->write1)*/ | |
1410 | pEnd->write1=0x01; /* first end ccw is now active */ | |
1411 | /* set up Tic CCWs */ | |
1412 | p_last_ccw->w_TIC_1.cda= | |
1413 | (__u32)__pa(&pEnd->write1_nop1); | |
1414 | pEnd->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1415 | pEnd->write1_nop2.flags = | |
1416 | CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1417 | pEnd->write1_nop2.cda=0; | |
1418 | pEnd->write1_nop2.count=1; | |
1419 | } /* end if if (pEnd->write1) */ | |
1420 | ||
1da177e4 LT |
1421 | if (privptr->p_write_active_first==NULL ) { |
1422 | privptr->p_write_active_first=p_first_ccw; | |
1423 | privptr->p_write_active_last=p_last_ccw; | |
1424 | } | |
1425 | else { | |
1da177e4 LT |
1426 | /* set up Tic CCWs */ |
1427 | ||
1428 | tempCCW.cda=(__u32)__pa(&p_first_ccw->write); | |
1429 | tempCCW.count=0; | |
1430 | tempCCW.flags=0; | |
1431 | tempCCW.cmd_code=CCW_CLAW_CMD_TIC; | |
1432 | ||
1433 | if (pEnd->write1) { | |
1434 | ||
1435 | /* | |
1436 | * first set of ending CCW's is chained to the new write | |
1437 | * chain, so the second set is chained to the active chain | |
1438 | * Therefore modify the second set to point the new write chain. | |
1439 | * make sure we update the CCW atomically | |
1440 | * so channel does not fetch it when it's only half done | |
1441 | */ | |
1442 | memcpy( &pEnd->write2_nop2, &tempCCW , | |
1443 | sizeof(struct ccw1)); | |
1444 | privptr->p_write_active_last->w_TIC_1.cda= | |
1445 | (__u32)__pa(&p_first_ccw->write); | |
1446 | } | |
1447 | else { | |
1448 | ||
1449 | /*make sure we update the CCW atomically | |
1450 | *so channel does not fetch it when it's only half done | |
1451 | */ | |
1452 | memcpy(&pEnd->write1_nop2, &tempCCW , | |
1453 | sizeof(struct ccw1)); | |
1454 | privptr->p_write_active_last->w_TIC_1.cda= | |
1455 | (__u32)__pa(&p_first_ccw->write); | |
1456 | ||
1457 | } /* end if if (pEnd->write1) */ | |
1458 | ||
1459 | privptr->p_write_active_last->next=p_first_ccw; | |
1460 | privptr->p_write_active_last=p_last_ccw; | |
1461 | } | |
1462 | ||
1463 | } /* endif (p_first_ccw!=NULL) */ | |
8e84c801 | 1464 | dev_kfree_skb_any(skb); |
1da177e4 LT |
1465 | if (linkid==0) { |
1466 | lock=LOCK_NO; | |
1467 | } | |
1468 | else { | |
1469 | lock=LOCK_YES; | |
1470 | } | |
1471 | claw_strt_out_IO(dev ); | |
1472 | /* if write free count is zero , set NOBUFFER */ | |
1da177e4 LT |
1473 | if (privptr->write_free_count==0) { |
1474 | claw_setbit_busy(TB_NOBUFFER,dev); | |
1475 | } | |
1476 | Done2: | |
1477 | claw_clearbit_busy(TB_TX,dev); | |
1478 | Done: | |
1da177e4 LT |
1479 | return(rc); |
1480 | } /* end of claw_hw_tx */ | |
1481 | ||
1482 | /*-------------------------------------------------------------------* | |
1483 | * * | |
1484 | * init_ccw_bk * | |
1485 | * * | |
1486 | *--------------------------------------------------------------------*/ | |
1487 | ||
1488 | static int | |
1489 | init_ccw_bk(struct net_device *dev) | |
1490 | { | |
1491 | ||
1492 | __u32 ccw_blocks_required; | |
1493 | __u32 ccw_blocks_perpage; | |
1494 | __u32 ccw_pages_required; | |
1495 | __u32 claw_reads_perpage=1; | |
1496 | __u32 claw_read_pages; | |
1497 | __u32 claw_writes_perpage=1; | |
1498 | __u32 claw_write_pages; | |
1499 | void *p_buff=NULL; | |
1500 | struct ccwbk*p_free_chain; | |
1501 | struct ccwbk*p_buf; | |
1502 | struct ccwbk*p_last_CCWB; | |
1503 | struct ccwbk*p_first_CCWB; | |
1504 | struct endccw *p_endccw=NULL; | |
6951df34 PT |
1505 | addr_t real_address; |
1506 | struct claw_privbk *privptr = dev->ml_priv; | |
1da177e4 LT |
1507 | struct clawh *pClawH=NULL; |
1508 | addr_t real_TIC_address; | |
1509 | int i,j; | |
b805da74 | 1510 | CLAW_DBF_TEXT(4, trace, "init_ccw"); |
1da177e4 LT |
1511 | |
1512 | /* initialize statistics field */ | |
1513 | privptr->active_link_ID=0; | |
1514 | /* initialize ccwbk pointers */ | |
1515 | privptr->p_write_free_chain=NULL; /* pointer to free ccw chain*/ | |
1516 | privptr->p_write_active_first=NULL; /* pointer to the first write ccw*/ | |
1517 | privptr->p_write_active_last=NULL; /* pointer to the last write ccw*/ | |
1518 | privptr->p_read_active_first=NULL; /* pointer to the first read ccw*/ | |
1519 | privptr->p_read_active_last=NULL; /* pointer to the last read ccw */ | |
1520 | privptr->p_end_ccw=NULL; /* pointer to ending ccw */ | |
1521 | privptr->p_claw_signal_blk=NULL; /* pointer to signal block */ | |
1522 | privptr->buffs_alloc = 0; | |
1523 | memset(&privptr->end_ccw, 0x00, sizeof(struct endccw)); | |
1524 | memset(&privptr->ctl_bk, 0x00, sizeof(struct clawctl)); | |
1525 | /* initialize free write ccwbk counter */ | |
1526 | privptr->write_free_count=0; /* number of free bufs on write chain */ | |
1527 | p_last_CCWB = NULL; | |
1528 | p_first_CCWB= NULL; | |
1529 | /* | |
1530 | * We need 1 CCW block for each read buffer, 1 for each | |
1531 | * write buffer, plus 1 for ClawSignalBlock | |
1532 | */ | |
1533 | ccw_blocks_required = | |
1534 | privptr->p_env->read_buffers+privptr->p_env->write_buffers+1; | |
1da177e4 LT |
1535 | /* |
1536 | * compute number of CCW blocks that will fit in a page | |
1537 | */ | |
1538 | ccw_blocks_perpage= PAGE_SIZE / CCWBK_SIZE; | |
1539 | ccw_pages_required= | |
f5154fbf | 1540 | DIV_ROUND_UP(ccw_blocks_required, ccw_blocks_perpage); |
1da177e4 | 1541 | |
1da177e4 LT |
1542 | /* |
1543 | * read and write sizes are set by 2 constants in claw.h | |
1544 | * 4k and 32k. Unpacked values other than 4k are not going to | |
1545 | * provide good performance. With packing buffers support 32k | |
1546 | * buffers are used. | |
1547 | */ | |
f5154fbf JL |
1548 | if (privptr->p_env->read_size < PAGE_SIZE) { |
1549 | claw_reads_perpage = PAGE_SIZE / privptr->p_env->read_size; | |
1550 | claw_read_pages = DIV_ROUND_UP(privptr->p_env->read_buffers, | |
1551 | claw_reads_perpage); | |
1da177e4 LT |
1552 | } |
1553 | else { /* > or equal */ | |
f5154fbf JL |
1554 | privptr->p_buff_pages_perread = |
1555 | DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); | |
1556 | claw_read_pages = privptr->p_env->read_buffers * | |
1557 | privptr->p_buff_pages_perread; | |
1da177e4 LT |
1558 | } |
1559 | if (privptr->p_env->write_size < PAGE_SIZE) { | |
f5154fbf JL |
1560 | claw_writes_perpage = |
1561 | PAGE_SIZE / privptr->p_env->write_size; | |
1562 | claw_write_pages = DIV_ROUND_UP(privptr->p_env->write_buffers, | |
1563 | claw_writes_perpage); | |
1da177e4 LT |
1564 | |
1565 | } | |
1566 | else { /* > or equal */ | |
f5154fbf JL |
1567 | privptr->p_buff_pages_perwrite = |
1568 | DIV_ROUND_UP(privptr->p_env->read_size, PAGE_SIZE); | |
1569 | claw_write_pages = privptr->p_env->write_buffers * | |
1570 | privptr->p_buff_pages_perwrite; | |
1da177e4 | 1571 | } |
1da177e4 LT |
1572 | /* |
1573 | * allocate ccw_pages_required | |
1574 | */ | |
1575 | if (privptr->p_buff_ccw==NULL) { | |
1576 | privptr->p_buff_ccw= | |
1577 | (void *)__get_free_pages(__GFP_DMA, | |
1578 | (int)pages_to_order_of_mag(ccw_pages_required )); | |
1579 | if (privptr->p_buff_ccw==NULL) { | |
1da177e4 LT |
1580 | return -ENOMEM; |
1581 | } | |
1582 | privptr->p_buff_ccw_num=ccw_pages_required; | |
1583 | } | |
1584 | memset(privptr->p_buff_ccw, 0x00, | |
1585 | privptr->p_buff_ccw_num * PAGE_SIZE); | |
1586 | ||
1587 | /* | |
1588 | * obtain ending ccw block address | |
1589 | * | |
1590 | */ | |
1591 | privptr->p_end_ccw = (struct endccw *)&privptr->end_ccw; | |
1592 | real_address = (__u32)__pa(privptr->p_end_ccw); | |
1593 | /* Initialize ending CCW block */ | |
1da177e4 LT |
1594 | p_endccw=privptr->p_end_ccw; |
1595 | p_endccw->real=real_address; | |
1596 | p_endccw->write1=0x00; | |
1597 | p_endccw->read1=0x00; | |
1598 | ||
1599 | /* write1_nop1 */ | |
1600 | p_endccw->write1_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1601 | p_endccw->write1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1602 | p_endccw->write1_nop1.count = 1; | |
1603 | p_endccw->write1_nop1.cda = 0; | |
1604 | ||
1605 | /* write1_nop2 */ | |
1606 | p_endccw->write1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1607 | p_endccw->write1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1608 | p_endccw->write1_nop2.count = 1; | |
1609 | p_endccw->write1_nop2.cda = 0; | |
1610 | ||
1611 | /* write2_nop1 */ | |
1612 | p_endccw->write2_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1613 | p_endccw->write2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1614 | p_endccw->write2_nop1.count = 1; | |
1615 | p_endccw->write2_nop1.cda = 0; | |
1616 | ||
1617 | /* write2_nop2 */ | |
1618 | p_endccw->write2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1619 | p_endccw->write2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1620 | p_endccw->write2_nop2.count = 1; | |
1621 | p_endccw->write2_nop2.cda = 0; | |
1622 | ||
1623 | /* read1_nop1 */ | |
1624 | p_endccw->read1_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1625 | p_endccw->read1_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1626 | p_endccw->read1_nop1.count = 1; | |
1627 | p_endccw->read1_nop1.cda = 0; | |
1628 | ||
1629 | /* read1_nop2 */ | |
1630 | p_endccw->read1_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1631 | p_endccw->read1_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1632 | p_endccw->read1_nop2.count = 1; | |
1633 | p_endccw->read1_nop2.cda = 0; | |
1634 | ||
1635 | /* read2_nop1 */ | |
1636 | p_endccw->read2_nop1.cmd_code = CCW_CLAW_CMD_NOP; | |
1637 | p_endccw->read2_nop1.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1638 | p_endccw->read2_nop1.count = 1; | |
1639 | p_endccw->read2_nop1.cda = 0; | |
1640 | ||
1641 | /* read2_nop2 */ | |
1642 | p_endccw->read2_nop2.cmd_code = CCW_CLAW_CMD_READFF; | |
1643 | p_endccw->read2_nop2.flags = CCW_FLAG_SLI | CCW_FLAG_SKIP; | |
1644 | p_endccw->read2_nop2.count = 1; | |
1645 | p_endccw->read2_nop2.cda = 0; | |
1646 | ||
1da177e4 LT |
1647 | /* |
1648 | * Build a chain of CCWs | |
1649 | * | |
1650 | */ | |
1da177e4 LT |
1651 | p_buff=privptr->p_buff_ccw; |
1652 | ||
1653 | p_free_chain=NULL; | |
1654 | for (i=0 ; i < ccw_pages_required; i++ ) { | |
1655 | real_address = (__u32)__pa(p_buff); | |
1656 | p_buf=p_buff; | |
1657 | for (j=0 ; j < ccw_blocks_perpage ; j++) { | |
1658 | p_buf->next = p_free_chain; | |
1659 | p_free_chain = p_buf; | |
1660 | p_buf->real=(__u32)__pa(p_buf); | |
1661 | ++p_buf; | |
1662 | } | |
1663 | p_buff+=PAGE_SIZE; | |
1664 | } | |
1da177e4 LT |
1665 | /* |
1666 | * Initialize ClawSignalBlock | |
1667 | * | |
1668 | */ | |
1da177e4 LT |
1669 | if (privptr->p_claw_signal_blk==NULL) { |
1670 | privptr->p_claw_signal_blk=p_free_chain; | |
1671 | p_free_chain=p_free_chain->next; | |
1672 | pClawH=(struct clawh *)privptr->p_claw_signal_blk; | |
1673 | pClawH->length=0xffff; | |
1674 | pClawH->opcode=0xff; | |
1675 | pClawH->flag=CLAW_BUSY; | |
1676 | } | |
1da177e4 LT |
1677 | |
1678 | /* | |
1679 | * allocate write_pages_required and add to free chain | |
1680 | */ | |
1681 | if (privptr->p_buff_write==NULL) { | |
1682 | if (privptr->p_env->write_size < PAGE_SIZE) { | |
1683 | privptr->p_buff_write= | |
1684 | (void *)__get_free_pages(__GFP_DMA, | |
1685 | (int)pages_to_order_of_mag(claw_write_pages )); | |
1686 | if (privptr->p_buff_write==NULL) { | |
1da177e4 | 1687 | privptr->p_buff_ccw=NULL; |
1da177e4 LT |
1688 | return -ENOMEM; |
1689 | } | |
1690 | /* | |
1691 | * Build CLAW write free chain | |
1692 | * | |
1693 | */ | |
1694 | ||
1695 | memset(privptr->p_buff_write, 0x00, | |
1696 | ccw_pages_required * PAGE_SIZE); | |
1da177e4 LT |
1697 | privptr->p_write_free_chain=NULL; |
1698 | ||
1699 | p_buff=privptr->p_buff_write; | |
1700 | ||
1701 | for (i=0 ; i< privptr->p_env->write_buffers ; i++) { | |
1702 | p_buf = p_free_chain; /* get a CCW */ | |
1703 | p_free_chain = p_buf->next; | |
1704 | p_buf->next =privptr->p_write_free_chain; | |
1705 | privptr->p_write_free_chain = p_buf; | |
1706 | p_buf-> p_buffer = (struct clawbuf *)p_buff; | |
1707 | p_buf-> write.cda = (__u32)__pa(p_buff); | |
1708 | p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1709 | p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1710 | p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1711 | p_buf-> w_read_FF.count = 1; | |
1712 | p_buf-> w_read_FF.cda = | |
1713 | (__u32)__pa(&p_buf-> header.flag); | |
1714 | p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1715 | p_buf-> w_TIC_1.flags = 0; | |
1716 | p_buf-> w_TIC_1.count = 0; | |
1717 | ||
4811fcb7 AR |
1718 | if (((unsigned long)p_buff + |
1719 | privptr->p_env->write_size) >= | |
1da177e4 | 1720 | ((unsigned long)(p_buff+2* |
4811fcb7 AR |
1721 | (privptr->p_env->write_size) - 1) & PAGE_MASK)) { |
1722 | p_buff = p_buff+privptr->p_env->write_size; | |
1da177e4 LT |
1723 | } |
1724 | } | |
1725 | } | |
1726 | else /* Buffers are => PAGE_SIZE. 1 buff per get_free_pages */ | |
1727 | { | |
1728 | privptr->p_write_free_chain=NULL; | |
1729 | for (i = 0; i< privptr->p_env->write_buffers ; i++) { | |
1730 | p_buff=(void *)__get_free_pages(__GFP_DMA, | |
1731 | (int)pages_to_order_of_mag( | |
1732 | privptr->p_buff_pages_perwrite) ); | |
1da177e4 | 1733 | if (p_buff==NULL) { |
1da177e4 LT |
1734 | free_pages((unsigned long)privptr->p_buff_ccw, |
1735 | (int)pages_to_order_of_mag( | |
1736 | privptr->p_buff_ccw_num)); | |
1737 | privptr->p_buff_ccw=NULL; | |
1738 | p_buf=privptr->p_buff_write; | |
1739 | while (p_buf!=NULL) { | |
1740 | free_pages((unsigned long) | |
1741 | p_buf->p_buffer, | |
1742 | (int)pages_to_order_of_mag( | |
1743 | privptr->p_buff_pages_perwrite)); | |
1744 | p_buf=p_buf->next; | |
1745 | } | |
1da177e4 LT |
1746 | return -ENOMEM; |
1747 | } /* Error on get_pages */ | |
1748 | memset(p_buff, 0x00, privptr->p_env->write_size ); | |
1749 | p_buf = p_free_chain; | |
1750 | p_free_chain = p_buf->next; | |
1751 | p_buf->next = privptr->p_write_free_chain; | |
1752 | privptr->p_write_free_chain = p_buf; | |
1753 | privptr->p_buff_write = p_buf; | |
1754 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1755 | p_buf-> write.cda = (__u32)__pa(p_buff); | |
1756 | p_buf-> write.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1757 | p_buf-> w_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1758 | p_buf-> w_read_FF.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1759 | p_buf-> w_read_FF.count = 1; | |
1760 | p_buf-> w_read_FF.cda = | |
1761 | (__u32)__pa(&p_buf-> header.flag); | |
1762 | p_buf-> w_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1763 | p_buf-> w_TIC_1.flags = 0; | |
1764 | p_buf-> w_TIC_1.count = 0; | |
1765 | } /* for all write_buffers */ | |
1766 | ||
1767 | } /* else buffers are PAGE_SIZE or bigger */ | |
1768 | ||
1769 | } | |
1770 | privptr->p_buff_write_num=claw_write_pages; | |
1771 | privptr->write_free_count=privptr->p_env->write_buffers; | |
1772 | ||
1773 | ||
1da177e4 LT |
1774 | /* |
1775 | * allocate read_pages_required and chain to free chain | |
1776 | */ | |
1777 | if (privptr->p_buff_read==NULL) { | |
1778 | if (privptr->p_env->read_size < PAGE_SIZE) { | |
1779 | privptr->p_buff_read= | |
1780 | (void *)__get_free_pages(__GFP_DMA, | |
1781 | (int)pages_to_order_of_mag(claw_read_pages) ); | |
1782 | if (privptr->p_buff_read==NULL) { | |
1da177e4 LT |
1783 | free_pages((unsigned long)privptr->p_buff_ccw, |
1784 | (int)pages_to_order_of_mag( | |
1785 | privptr->p_buff_ccw_num)); | |
1786 | /* free the write pages size is < page size */ | |
1787 | free_pages((unsigned long)privptr->p_buff_write, | |
1788 | (int)pages_to_order_of_mag( | |
1789 | privptr->p_buff_write_num)); | |
1790 | privptr->p_buff_ccw=NULL; | |
1791 | privptr->p_buff_write=NULL; | |
1da177e4 LT |
1792 | return -ENOMEM; |
1793 | } | |
1794 | memset(privptr->p_buff_read, 0x00, claw_read_pages * PAGE_SIZE); | |
1795 | privptr->p_buff_read_num=claw_read_pages; | |
1796 | /* | |
1797 | * Build CLAW read free chain | |
1798 | * | |
1799 | */ | |
1da177e4 LT |
1800 | p_buff=privptr->p_buff_read; |
1801 | for (i=0 ; i< privptr->p_env->read_buffers ; i++) { | |
1802 | p_buf = p_free_chain; | |
1803 | p_free_chain = p_buf->next; | |
1804 | ||
1805 | if (p_last_CCWB==NULL) { | |
1806 | p_buf->next=NULL; | |
1807 | real_TIC_address=0; | |
1808 | p_last_CCWB=p_buf; | |
1809 | } | |
1810 | else { | |
1811 | p_buf->next=p_first_CCWB; | |
1812 | real_TIC_address= | |
1813 | (__u32)__pa(&p_first_CCWB -> read ); | |
1814 | } | |
1815 | ||
1816 | p_first_CCWB=p_buf; | |
1817 | ||
1818 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1819 | /* initialize read command */ | |
1820 | p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; | |
1821 | p_buf-> read.cda = (__u32)__pa(p_buff); | |
1822 | p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1823 | p_buf-> read.count = privptr->p_env->read_size; | |
1824 | ||
1825 | /* initialize read_h command */ | |
1826 | p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; | |
1827 | p_buf-> read_h.cda = | |
1828 | (__u32)__pa(&(p_buf->header)); | |
1829 | p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1830 | p_buf-> read_h.count = sizeof(struct clawh); | |
1831 | ||
1832 | /* initialize Signal command */ | |
1833 | p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; | |
1834 | p_buf-> signal.cda = | |
1835 | (__u32)__pa(&(pClawH->flag)); | |
1836 | p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1837 | p_buf-> signal.count = 1; | |
1838 | ||
1839 | /* initialize r_TIC_1 command */ | |
1840 | p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1841 | p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; | |
1842 | p_buf-> r_TIC_1.flags = 0; | |
1843 | p_buf-> r_TIC_1.count = 0; | |
1844 | ||
1845 | /* initialize r_read_FF command */ | |
1846 | p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1847 | p_buf-> r_read_FF.cda = | |
1848 | (__u32)__pa(&(pClawH->flag)); | |
1849 | p_buf-> r_read_FF.flags = | |
1850 | CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; | |
1851 | p_buf-> r_read_FF.count = 1; | |
1852 | ||
1853 | /* initialize r_TIC_2 */ | |
1854 | memcpy(&p_buf->r_TIC_2, | |
1855 | &p_buf->r_TIC_1, sizeof(struct ccw1)); | |
1856 | ||
1857 | /* initialize Header */ | |
1858 | p_buf->header.length=0xffff; | |
1859 | p_buf->header.opcode=0xff; | |
1860 | p_buf->header.flag=CLAW_PENDING; | |
1861 | ||
4811fcb7 AR |
1862 | if (((unsigned long)p_buff+privptr->p_env->read_size) >= |
1863 | ((unsigned long)(p_buff+2*(privptr->p_env->read_size) | |
1864 | -1) | |
1865 | & PAGE_MASK)) { | |
1da177e4 LT |
1866 | p_buff= p_buff+privptr->p_env->read_size; |
1867 | } | |
1868 | else { | |
1869 | p_buff= | |
1870 | (void *)((unsigned long) | |
4811fcb7 | 1871 | (p_buff+2*(privptr->p_env->read_size)-1) |
1da177e4 LT |
1872 | & PAGE_MASK) ; |
1873 | } | |
1874 | } /* for read_buffers */ | |
1875 | } /* read_size < PAGE_SIZE */ | |
1876 | else { /* read Size >= PAGE_SIZE */ | |
1da177e4 LT |
1877 | for (i=0 ; i< privptr->p_env->read_buffers ; i++) { |
1878 | p_buff = (void *)__get_free_pages(__GFP_DMA, | |
4811fcb7 AR |
1879 | (int)pages_to_order_of_mag( |
1880 | privptr->p_buff_pages_perread)); | |
1da177e4 | 1881 | if (p_buff==NULL) { |
1da177e4 | 1882 | free_pages((unsigned long)privptr->p_buff_ccw, |
4811fcb7 AR |
1883 | (int)pages_to_order_of_mag(privptr-> |
1884 | p_buff_ccw_num)); | |
1da177e4 LT |
1885 | /* free the write pages */ |
1886 | p_buf=privptr->p_buff_write; | |
1887 | while (p_buf!=NULL) { | |
4811fcb7 AR |
1888 | free_pages( |
1889 | (unsigned long)p_buf->p_buffer, | |
1890 | (int)pages_to_order_of_mag( | |
1891 | privptr->p_buff_pages_perwrite)); | |
1da177e4 LT |
1892 | p_buf=p_buf->next; |
1893 | } | |
1894 | /* free any read pages already alloc */ | |
1895 | p_buf=privptr->p_buff_read; | |
1896 | while (p_buf!=NULL) { | |
4811fcb7 AR |
1897 | free_pages( |
1898 | (unsigned long)p_buf->p_buffer, | |
1899 | (int)pages_to_order_of_mag( | |
1900 | privptr->p_buff_pages_perread)); | |
1da177e4 LT |
1901 | p_buf=p_buf->next; |
1902 | } | |
1903 | privptr->p_buff_ccw=NULL; | |
1904 | privptr->p_buff_write=NULL; | |
1da177e4 LT |
1905 | return -ENOMEM; |
1906 | } | |
1907 | memset(p_buff, 0x00, privptr->p_env->read_size); | |
1908 | p_buf = p_free_chain; | |
1909 | privptr->p_buff_read = p_buf; | |
1910 | p_free_chain = p_buf->next; | |
1911 | ||
1912 | if (p_last_CCWB==NULL) { | |
1913 | p_buf->next=NULL; | |
1914 | real_TIC_address=0; | |
1915 | p_last_CCWB=p_buf; | |
1916 | } | |
1917 | else { | |
1918 | p_buf->next=p_first_CCWB; | |
1919 | real_TIC_address= | |
1920 | (addr_t)__pa( | |
1921 | &p_first_CCWB -> read ); | |
1922 | } | |
1923 | ||
1924 | p_first_CCWB=p_buf; | |
1925 | /* save buff address */ | |
1926 | p_buf->p_buffer=(struct clawbuf *)p_buff; | |
1927 | /* initialize read command */ | |
1928 | p_buf-> read.cmd_code = CCW_CLAW_CMD_READ; | |
1929 | p_buf-> read.cda = (__u32)__pa(p_buff); | |
1930 | p_buf-> read.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1931 | p_buf-> read.count = privptr->p_env->read_size; | |
1932 | ||
1933 | /* initialize read_h command */ | |
1934 | p_buf-> read_h.cmd_code = CCW_CLAW_CMD_READHEADER; | |
1935 | p_buf-> read_h.cda = | |
1936 | (__u32)__pa(&(p_buf->header)); | |
1937 | p_buf-> read_h.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1938 | p_buf-> read_h.count = sizeof(struct clawh); | |
1939 | ||
1940 | /* initialize Signal command */ | |
1941 | p_buf-> signal.cmd_code = CCW_CLAW_CMD_SIGNAL_SMOD; | |
1942 | p_buf-> signal.cda = | |
1943 | (__u32)__pa(&(pClawH->flag)); | |
1944 | p_buf-> signal.flags = CCW_FLAG_SLI | CCW_FLAG_CC; | |
1945 | p_buf-> signal.count = 1; | |
1946 | ||
1947 | /* initialize r_TIC_1 command */ | |
1948 | p_buf-> r_TIC_1.cmd_code = CCW_CLAW_CMD_TIC; | |
1949 | p_buf-> r_TIC_1.cda = (__u32)real_TIC_address; | |
1950 | p_buf-> r_TIC_1.flags = 0; | |
1951 | p_buf-> r_TIC_1.count = 0; | |
1952 | ||
1953 | /* initialize r_read_FF command */ | |
1954 | p_buf-> r_read_FF.cmd_code = CCW_CLAW_CMD_READFF; | |
1955 | p_buf-> r_read_FF.cda = | |
1956 | (__u32)__pa(&(pClawH->flag)); | |
1957 | p_buf-> r_read_FF.flags = | |
1958 | CCW_FLAG_SLI | CCW_FLAG_CC | CCW_FLAG_PCI; | |
1959 | p_buf-> r_read_FF.count = 1; | |
1960 | ||
1961 | /* initialize r_TIC_2 */ | |
1962 | memcpy(&p_buf->r_TIC_2, &p_buf->r_TIC_1, | |
1963 | sizeof(struct ccw1)); | |
1964 | ||
1965 | /* initialize Header */ | |
1966 | p_buf->header.length=0xffff; | |
1967 | p_buf->header.opcode=0xff; | |
1968 | p_buf->header.flag=CLAW_PENDING; | |
1969 | ||
1970 | } /* For read_buffers */ | |
1971 | } /* read_size >= PAGE_SIZE */ | |
1972 | } /* pBuffread = NULL */ | |
1da177e4 LT |
1973 | add_claw_reads( dev ,p_first_CCWB , p_last_CCWB); |
1974 | privptr->buffs_alloc = 1; | |
b805da74 | 1975 | |
1da177e4 LT |
1976 | return 0; |
1977 | } /* end of init_ccw_bk */ | |
1978 | ||
1979 | /*-------------------------------------------------------------------* | |
1980 | * * | |
1981 | * probe_error * | |
1982 | * * | |
1983 | *--------------------------------------------------------------------*/ | |
1984 | ||
1985 | static void | |
1986 | probe_error( struct ccwgroup_device *cgdev) | |
1987 | { | |
2b356b46 | 1988 | struct claw_privbk *privptr; |
b805da74 AR |
1989 | |
1990 | CLAW_DBF_TEXT(4, trace, "proberr"); | |
dff59b64 | 1991 | privptr = dev_get_drvdata(&cgdev->dev); |
2b356b46 | 1992 | if (privptr != NULL) { |
dff59b64 | 1993 | dev_set_drvdata(&cgdev->dev, NULL); |
17fd682e | 1994 | kfree(privptr->p_env); |
2b356b46 MS |
1995 | kfree(privptr->p_mtc_envelope); |
1996 | kfree(privptr); | |
1997 | } | |
1da177e4 LT |
1998 | } /* probe_error */ |
1999 | ||
1da177e4 LT |
2000 | /*-------------------------------------------------------------------* |
2001 | * claw_process_control * | |
2002 | * * | |
2003 | * * | |
2004 | *--------------------------------------------------------------------*/ | |
2005 | ||
2006 | static int | |
2007 | claw_process_control( struct net_device *dev, struct ccwbk * p_ccw) | |
2008 | { | |
2009 | ||
2010 | struct clawbuf *p_buf; | |
2011 | struct clawctl ctlbk; | |
2012 | struct clawctl *p_ctlbk; | |
2013 | char temp_host_name[8]; | |
2014 | char temp_ws_name[8]; | |
2015 | struct claw_privbk *privptr; | |
2016 | struct claw_env *p_env; | |
2017 | struct sysval *p_sysval; | |
2018 | struct conncmd *p_connect=NULL; | |
2019 | int rc; | |
2020 | struct chbk *p_ch = NULL; | |
b805da74 AR |
2021 | struct device *tdev; |
2022 | CLAW_DBF_TEXT(2, setup, "clw_cntl"); | |
1da177e4 LT |
2023 | udelay(1000); /* Wait a ms for the control packets to |
2024 | *catch up to each other */ | |
6951df34 | 2025 | privptr = dev->ml_priv; |
1da177e4 | 2026 | p_env=privptr->p_env; |
b805da74 | 2027 | tdev = &privptr->channel[READ].cdev->dev; |
1da177e4 LT |
2028 | memcpy( &temp_host_name, p_env->host_name, 8); |
2029 | memcpy( &temp_ws_name, p_env->adapter_name , 8); | |
4811fcb7 | 2030 | dev_info(tdev, "%s: CLAW device %.8s: " |
1da177e4 LT |
2031 | "Received Control Packet\n", |
2032 | dev->name, temp_ws_name); | |
2033 | if (privptr->release_pend==1) { | |
1da177e4 LT |
2034 | return 0; |
2035 | } | |
2036 | p_buf=p_ccw->p_buffer; | |
2037 | p_ctlbk=&ctlbk; | |
2038 | if (p_env->packing == DO_PACKED) { /* packing in progress?*/ | |
2039 | memcpy(p_ctlbk, &p_buf->buffer[4], sizeof(struct clawctl)); | |
2040 | } else { | |
2041 | memcpy(p_ctlbk, p_buf, sizeof(struct clawctl)); | |
2042 | } | |
1da177e4 LT |
2043 | switch (p_ctlbk->command) |
2044 | { | |
b805da74 AR |
2045 | case SYSTEM_VALIDATE_REQUEST: |
2046 | if (p_ctlbk->version != CLAW_VERSION_ID) { | |
2047 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2048 | CLAW_RC_WRONG_VERSION); | |
4811fcb7 AR |
2049 | dev_warn(tdev, "The communication peer of %s" |
2050 | " uses an incorrect API version %d\n", | |
2051 | dev->name, p_ctlbk->version); | |
b805da74 AR |
2052 | } |
2053 | p_sysval = (struct sysval *)&(p_ctlbk->data); | |
4811fcb7 AR |
2054 | dev_info(tdev, "%s: Recv Sys Validate Request: " |
2055 | "Vers=%d,link_id=%d,Corr=%d,WS name=%.8s," | |
2056 | "Host name=%.8s\n", | |
2057 | dev->name, p_ctlbk->version, | |
2058 | p_ctlbk->linkid, | |
2059 | p_ctlbk->correlator, | |
2060 | p_sysval->WS_name, | |
2061 | p_sysval->host_name); | |
b805da74 AR |
2062 | if (memcmp(temp_host_name, p_sysval->host_name, 8)) { |
2063 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2064 | CLAW_RC_NAME_MISMATCH); | |
2065 | CLAW_DBF_TEXT(2, setup, "HSTBAD"); | |
2066 | CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->host_name); | |
2067 | CLAW_DBF_TEXT_(2, setup, "%s", temp_host_name); | |
4811fcb7 AR |
2068 | dev_warn(tdev, |
2069 | "Host name %s for %s does not match the" | |
2070 | " remote adapter name %s\n", | |
b805da74 | 2071 | p_sysval->host_name, |
4811fcb7 | 2072 | dev->name, |
b805da74 AR |
2073 | temp_host_name); |
2074 | } | |
2075 | if (memcmp(temp_ws_name, p_sysval->WS_name, 8)) { | |
2076 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2077 | CLAW_RC_NAME_MISMATCH); | |
2078 | CLAW_DBF_TEXT(2, setup, "WSNBAD"); | |
2079 | CLAW_DBF_TEXT_(2, setup, "%s", p_sysval->WS_name); | |
2080 | CLAW_DBF_TEXT_(2, setup, "%s", temp_ws_name); | |
4811fcb7 AR |
2081 | dev_warn(tdev, "Adapter name %s for %s does not match" |
2082 | " the remote host name %s\n", | |
2083 | p_sysval->WS_name, | |
2084 | dev->name, | |
2085 | temp_ws_name); | |
b805da74 AR |
2086 | } |
2087 | if ((p_sysval->write_frame_size < p_env->write_size) && | |
2088 | (p_env->packing == 0)) { | |
2089 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2090 | CLAW_RC_HOST_RCV_TOO_SMALL); | |
4811fcb7 AR |
2091 | dev_warn(tdev, |
2092 | "The local write buffer is smaller than the" | |
2093 | " remote read buffer\n"); | |
b805da74 AR |
2094 | CLAW_DBF_TEXT(2, setup, "wrtszbad"); |
2095 | } | |
2096 | if ((p_sysval->read_frame_size < p_env->read_size) && | |
2097 | (p_env->packing == 0)) { | |
2098 | claw_snd_sys_validate_rsp(dev, p_ctlbk, | |
2099 | CLAW_RC_HOST_RCV_TOO_SMALL); | |
4811fcb7 AR |
2100 | dev_warn(tdev, |
2101 | "The local read buffer is smaller than the" | |
2102 | " remote write buffer\n"); | |
b805da74 AR |
2103 | CLAW_DBF_TEXT(2, setup, "rdsizbad"); |
2104 | } | |
2105 | claw_snd_sys_validate_rsp(dev, p_ctlbk, 0); | |
4811fcb7 AR |
2106 | dev_info(tdev, |
2107 | "CLAW device %.8s: System validate" | |
2108 | " completed.\n", temp_ws_name); | |
2109 | dev_info(tdev, | |
2110 | "%s: sys Validate Rsize:%d Wsize:%d\n", | |
2111 | dev->name, p_sysval->read_frame_size, | |
2112 | p_sysval->write_frame_size); | |
b805da74 AR |
2113 | privptr->system_validate_comp = 1; |
2114 | if (strncmp(p_env->api_type, WS_APPL_NAME_PACKED, 6) == 0) | |
2115 | p_env->packing = PACKING_ASK; | |
2116 | claw_strt_conn_req(dev); | |
2117 | break; | |
2118 | case SYSTEM_VALIDATE_RESPONSE: | |
2119 | p_sysval = (struct sysval *)&(p_ctlbk->data); | |
4811fcb7 AR |
2120 | dev_info(tdev, |
2121 | "Settings for %s validated (version=%d, " | |
2122 | "remote device=%d, rc=%d, adapter name=%.8s, " | |
2123 | "host name=%.8s)\n", | |
b805da74 AR |
2124 | dev->name, |
2125 | p_ctlbk->version, | |
2126 | p_ctlbk->correlator, | |
2127 | p_ctlbk->rc, | |
2128 | p_sysval->WS_name, | |
2129 | p_sysval->host_name); | |
2130 | switch (p_ctlbk->rc) { | |
2131 | case 0: | |
4811fcb7 AR |
2132 | dev_info(tdev, "%s: CLAW device " |
2133 | "%.8s: System validate completed.\n", | |
2134 | dev->name, temp_ws_name); | |
b805da74 AR |
2135 | if (privptr->system_validate_comp == 0) |
2136 | claw_strt_conn_req(dev); | |
2137 | privptr->system_validate_comp = 1; | |
2138 | break; | |
2139 | case CLAW_RC_NAME_MISMATCH: | |
4811fcb7 AR |
2140 | dev_warn(tdev, "Validating %s failed because of" |
2141 | " a host or adapter name mismatch\n", | |
2142 | dev->name); | |
b805da74 AR |
2143 | break; |
2144 | case CLAW_RC_WRONG_VERSION: | |
4811fcb7 AR |
2145 | dev_warn(tdev, "Validating %s failed because of a" |
2146 | " version conflict\n", | |
b805da74 AR |
2147 | dev->name); |
2148 | break; | |
2149 | case CLAW_RC_HOST_RCV_TOO_SMALL: | |
4811fcb7 AR |
2150 | dev_warn(tdev, "Validating %s failed because of a" |
2151 | " frame size conflict\n", | |
b805da74 AR |
2152 | dev->name); |
2153 | break; | |
2154 | default: | |
4811fcb7 AR |
2155 | dev_warn(tdev, "The communication peer of %s rejected" |
2156 | " the connection\n", | |
2157 | dev->name); | |
b805da74 AR |
2158 | break; |
2159 | } | |
2160 | break; | |
1da177e4 | 2161 | |
b805da74 AR |
2162 | case CONNECTION_REQUEST: |
2163 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 | 2164 | dev_info(tdev, "%s: Recv Conn Req: Vers=%d,link_id=%d," |
b805da74 AR |
2165 | "Corr=%d,HOST appl=%.8s,WS appl=%.8s\n", |
2166 | dev->name, | |
2167 | p_ctlbk->version, | |
2168 | p_ctlbk->linkid, | |
2169 | p_ctlbk->correlator, | |
2170 | p_connect->host_name, | |
2171 | p_connect->WS_name); | |
2172 | if (privptr->active_link_ID != 0) { | |
2173 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2174 | dev_info(tdev, "%s rejected a connection request" |
2175 | " because it is already active\n", | |
b805da74 AR |
2176 | dev->name); |
2177 | } | |
2178 | if (p_ctlbk->linkid != 1) { | |
2179 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2180 | dev_info(tdev, "%s rejected a request to open multiple" |
2181 | " connections\n", | |
b805da74 AR |
2182 | dev->name); |
2183 | } | |
2184 | rc = find_link(dev, p_connect->host_name, p_connect->WS_name); | |
2185 | if (rc != 0) { | |
2186 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2187 | dev_info(tdev, "%s rejected a connection request" |
2188 | " because of a type mismatch\n", | |
b805da74 AR |
2189 | dev->name); |
2190 | } | |
2191 | claw_send_control(dev, | |
2192 | CONNECTION_CONFIRM, p_ctlbk->linkid, | |
2193 | p_ctlbk->correlator, | |
2194 | 0, p_connect->host_name, | |
2195 | p_connect->WS_name); | |
2196 | if (p_env->packing == PACKING_ASK) { | |
2197 | p_env->packing = PACK_SEND; | |
2198 | claw_snd_conn_req(dev, 0); | |
2199 | } | |
4811fcb7 | 2200 | dev_info(tdev, "%s: CLAW device %.8s: Connection " |
b805da74 AR |
2201 | "completed link_id=%d.\n", |
2202 | dev->name, temp_ws_name, | |
2203 | p_ctlbk->linkid); | |
2204 | privptr->active_link_ID = p_ctlbk->linkid; | |
2205 | p_ch = &privptr->channel[WRITE]; | |
2206 | wake_up(&p_ch->wait); /* wake up claw_open ( WRITE) */ | |
2207 | break; | |
2208 | case CONNECTION_RESPONSE: | |
2209 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 | 2210 | dev_info(tdev, "%s: Recv Conn Resp: Vers=%d,link_id=%d," |
b805da74 AR |
2211 | "Corr=%d,RC=%d,Host appl=%.8s, WS appl=%.8s\n", |
2212 | dev->name, | |
2213 | p_ctlbk->version, | |
2214 | p_ctlbk->linkid, | |
2215 | p_ctlbk->correlator, | |
2216 | p_ctlbk->rc, | |
2217 | p_connect->host_name, | |
2218 | p_connect->WS_name); | |
2219 | ||
2220 | if (p_ctlbk->rc != 0) { | |
4811fcb7 AR |
2221 | dev_warn(tdev, "The communication peer of %s rejected" |
2222 | " a connection request\n", | |
2223 | dev->name); | |
b805da74 AR |
2224 | return 1; |
2225 | } | |
2226 | rc = find_link(dev, | |
2227 | p_connect->host_name, p_connect->WS_name); | |
2228 | if (rc != 0) { | |
2229 | claw_snd_disc(dev, p_ctlbk); | |
4811fcb7 AR |
2230 | dev_warn(tdev, "The communication peer of %s" |
2231 | " rejected a connection " | |
2232 | "request because of a type mismatch\n", | |
b805da74 AR |
2233 | dev->name); |
2234 | } | |
2235 | /* should be until CONNECTION_CONFIRM */ | |
2236 | privptr->active_link_ID = -(p_ctlbk->linkid); | |
2237 | break; | |
2238 | case CONNECTION_CONFIRM: | |
2239 | p_connect = (struct conncmd *)&(p_ctlbk->data); | |
4811fcb7 AR |
2240 | dev_info(tdev, |
2241 | "%s: Recv Conn Confirm:Vers=%d,link_id=%d," | |
b805da74 AR |
2242 | "Corr=%d,Host appl=%.8s,WS appl=%.8s\n", |
2243 | dev->name, | |
2244 | p_ctlbk->version, | |
2245 | p_ctlbk->linkid, | |
2246 | p_ctlbk->correlator, | |
2247 | p_connect->host_name, | |
2248 | p_connect->WS_name); | |
2249 | if (p_ctlbk->linkid == -(privptr->active_link_ID)) { | |
2250 | privptr->active_link_ID = p_ctlbk->linkid; | |
2251 | if (p_env->packing > PACKING_ASK) { | |
4811fcb7 AR |
2252 | dev_info(tdev, |
2253 | "%s: Confirmed Now packing\n", dev->name); | |
1da177e4 LT |
2254 | p_env->packing = DO_PACKED; |
2255 | } | |
b805da74 AR |
2256 | p_ch = &privptr->channel[WRITE]; |
2257 | wake_up(&p_ch->wait); | |
2258 | } else { | |
4811fcb7 AR |
2259 | dev_warn(tdev, "Activating %s failed because of" |
2260 | " an incorrect link ID=%d\n", | |
b805da74 AR |
2261 | dev->name, p_ctlbk->linkid); |
2262 | claw_snd_disc(dev, p_ctlbk); | |
2263 | } | |
2264 | break; | |
2265 | case DISCONNECT: | |
4811fcb7 | 2266 | dev_info(tdev, "%s: Disconnect: " |
b805da74 AR |
2267 | "Vers=%d,link_id=%d,Corr=%d\n", |
2268 | dev->name, p_ctlbk->version, | |
2269 | p_ctlbk->linkid, p_ctlbk->correlator); | |
2270 | if ((p_ctlbk->linkid == 2) && | |
2271 | (p_env->packing == PACK_SEND)) { | |
2272 | privptr->active_link_ID = 1; | |
2273 | p_env->packing = DO_PACKED; | |
2274 | } else | |
2275 | privptr->active_link_ID = 0; | |
2276 | break; | |
2277 | case CLAW_ERROR: | |
4811fcb7 | 2278 | dev_warn(tdev, "The communication peer of %s failed\n", |
b805da74 AR |
2279 | dev->name); |
2280 | break; | |
2281 | default: | |
4811fcb7 AR |
2282 | dev_warn(tdev, "The communication peer of %s sent" |
2283 | " an unknown command code\n", | |
2284 | dev->name); | |
b805da74 | 2285 | break; |
1da177e4 LT |
2286 | } |
2287 | ||
1da177e4 LT |
2288 | return 0; |
2289 | } /* end of claw_process_control */ | |
2290 | ||
2291 | ||
2292 | /*-------------------------------------------------------------------* | |
2293 | * claw_send_control * | |
2294 | * * | |
2295 | *--------------------------------------------------------------------*/ | |
2296 | ||
2297 | static int | |
2298 | claw_send_control(struct net_device *dev, __u8 type, __u8 link, | |
2299 | __u8 correlator, __u8 rc, char *local_name, char *remote_name) | |
2300 | { | |
2301 | struct claw_privbk *privptr; | |
2302 | struct clawctl *p_ctl; | |
2303 | struct sysval *p_sysval; | |
2304 | struct conncmd *p_connect; | |
2305 | struct sk_buff *skb; | |
2306 | ||
b805da74 | 2307 | CLAW_DBF_TEXT(2, setup, "sndcntl"); |
6951df34 | 2308 | privptr = dev->ml_priv; |
1da177e4 LT |
2309 | p_ctl=(struct clawctl *)&privptr->ctl_bk; |
2310 | ||
2311 | p_ctl->command=type; | |
2312 | p_ctl->version=CLAW_VERSION_ID; | |
2313 | p_ctl->linkid=link; | |
2314 | p_ctl->correlator=correlator; | |
2315 | p_ctl->rc=rc; | |
2316 | ||
2317 | p_sysval=(struct sysval *)&p_ctl->data; | |
2318 | p_connect=(struct conncmd *)&p_ctl->data; | |
2319 | ||
2320 | switch (p_ctl->command) { | |
2321 | case SYSTEM_VALIDATE_REQUEST: | |
2322 | case SYSTEM_VALIDATE_RESPONSE: | |
2323 | memcpy(&p_sysval->host_name, local_name, 8); | |
2324 | memcpy(&p_sysval->WS_name, remote_name, 8); | |
2325 | if (privptr->p_env->packing > 0) { | |
4811fcb7 AR |
2326 | p_sysval->read_frame_size = DEF_PACK_BUFSIZE; |
2327 | p_sysval->write_frame_size = DEF_PACK_BUFSIZE; | |
1da177e4 | 2328 | } else { |
b805da74 | 2329 | /* how big is the biggest group of packets */ |
4811fcb7 AR |
2330 | p_sysval->read_frame_size = |
2331 | privptr->p_env->read_size; | |
2332 | p_sysval->write_frame_size = | |
2333 | privptr->p_env->write_size; | |
1da177e4 LT |
2334 | } |
2335 | memset(&p_sysval->reserved, 0x00, 4); | |
2336 | break; | |
2337 | case CONNECTION_REQUEST: | |
2338 | case CONNECTION_RESPONSE: | |
2339 | case CONNECTION_CONFIRM: | |
2340 | case DISCONNECT: | |
2341 | memcpy(&p_sysval->host_name, local_name, 8); | |
2342 | memcpy(&p_sysval->WS_name, remote_name, 8); | |
2343 | if (privptr->p_env->packing > 0) { | |
2344 | /* How big is the biggest packet */ | |
2345 | p_connect->reserved1[0]=CLAW_FRAME_SIZE; | |
2346 | p_connect->reserved1[1]=CLAW_FRAME_SIZE; | |
2347 | } else { | |
2348 | memset(&p_connect->reserved1, 0x00, 4); | |
2349 | memset(&p_connect->reserved2, 0x00, 4); | |
2350 | } | |
2351 | break; | |
2352 | default: | |
2353 | break; | |
2354 | } | |
2355 | ||
2356 | /* write Control Record to the device */ | |
2357 | ||
2358 | ||
2359 | skb = dev_alloc_skb(sizeof(struct clawctl)); | |
2360 | if (!skb) { | |
1da177e4 LT |
2361 | return -ENOMEM; |
2362 | } | |
2363 | memcpy(skb_put(skb, sizeof(struct clawctl)), | |
2364 | p_ctl, sizeof(struct clawctl)); | |
1da177e4 LT |
2365 | if (privptr->p_env->packing >= PACK_SEND) |
2366 | claw_hw_tx(skb, dev, 1); | |
2367 | else | |
2368 | claw_hw_tx(skb, dev, 0); | |
1da177e4 LT |
2369 | return 0; |
2370 | } /* end of claw_send_control */ | |
2371 | ||
2372 | /*-------------------------------------------------------------------* | |
2373 | * claw_snd_conn_req * | |
2374 | * * | |
2375 | *--------------------------------------------------------------------*/ | |
2376 | static int | |
2377 | claw_snd_conn_req(struct net_device *dev, __u8 link) | |
2378 | { | |
2379 | int rc; | |
6951df34 | 2380 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 LT |
2381 | struct clawctl *p_ctl; |
2382 | ||
b805da74 | 2383 | CLAW_DBF_TEXT(2, setup, "snd_conn"); |
1da177e4 LT |
2384 | rc = 1; |
2385 | p_ctl=(struct clawctl *)&privptr->ctl_bk; | |
2386 | p_ctl->linkid = link; | |
2387 | if ( privptr->system_validate_comp==0x00 ) { | |
1da177e4 LT |
2388 | return rc; |
2389 | } | |
2390 | if (privptr->p_env->packing == PACKING_ASK ) | |
2391 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2392 | WS_APPL_NAME_PACKED, WS_APPL_NAME_PACKED); | |
2393 | if (privptr->p_env->packing == PACK_SEND) { | |
2394 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2395 | WS_APPL_NAME_IP_NAME, WS_APPL_NAME_IP_NAME); | |
2396 | } | |
2397 | if (privptr->p_env->packing == 0) | |
2398 | rc=claw_send_control(dev, CONNECTION_REQUEST,0,0,0, | |
2399 | HOST_APPL_NAME, privptr->p_env->api_type); | |
1da177e4 LT |
2400 | return rc; |
2401 | ||
2402 | } /* end of claw_snd_conn_req */ | |
2403 | ||
2404 | ||
2405 | /*-------------------------------------------------------------------* | |
2406 | * claw_snd_disc * | |
2407 | * * | |
2408 | *--------------------------------------------------------------------*/ | |
2409 | ||
2410 | static int | |
2411 | claw_snd_disc(struct net_device *dev, struct clawctl * p_ctl) | |
2412 | { | |
2413 | int rc; | |
2414 | struct conncmd * p_connect; | |
2415 | ||
b805da74 | 2416 | CLAW_DBF_TEXT(2, setup, "snd_dsc"); |
1da177e4 LT |
2417 | p_connect=(struct conncmd *)&p_ctl->data; |
2418 | ||
2419 | rc=claw_send_control(dev, DISCONNECT, p_ctl->linkid, | |
2420 | p_ctl->correlator, 0, | |
2421 | p_connect->host_name, p_connect->WS_name); | |
1da177e4 LT |
2422 | return rc; |
2423 | } /* end of claw_snd_disc */ | |
2424 | ||
2425 | ||
2426 | /*-------------------------------------------------------------------* | |
2427 | * claw_snd_sys_validate_rsp * | |
2428 | * * | |
2429 | *--------------------------------------------------------------------*/ | |
2430 | ||
2431 | static int | |
2432 | claw_snd_sys_validate_rsp(struct net_device *dev, | |
2433 | struct clawctl *p_ctl, __u32 return_code) | |
2434 | { | |
2435 | struct claw_env * p_env; | |
2436 | struct claw_privbk *privptr; | |
2437 | int rc; | |
2438 | ||
b805da74 | 2439 | CLAW_DBF_TEXT(2, setup, "chkresp"); |
6951df34 | 2440 | privptr = dev->ml_priv; |
1da177e4 LT |
2441 | p_env=privptr->p_env; |
2442 | rc=claw_send_control(dev, SYSTEM_VALIDATE_RESPONSE, | |
2443 | p_ctl->linkid, | |
2444 | p_ctl->correlator, | |
2445 | return_code, | |
2446 | p_env->host_name, | |
2447 | p_env->adapter_name ); | |
1da177e4 LT |
2448 | return rc; |
2449 | } /* end of claw_snd_sys_validate_rsp */ | |
2450 | ||
2451 | /*-------------------------------------------------------------------* | |
2452 | * claw_strt_conn_req * | |
2453 | * * | |
2454 | *--------------------------------------------------------------------*/ | |
2455 | ||
2456 | static int | |
2457 | claw_strt_conn_req(struct net_device *dev ) | |
2458 | { | |
2459 | int rc; | |
2460 | ||
b805da74 | 2461 | CLAW_DBF_TEXT(2, setup, "conn_req"); |
1da177e4 | 2462 | rc=claw_snd_conn_req(dev, 1); |
1da177e4 LT |
2463 | return rc; |
2464 | } /* end of claw_strt_conn_req */ | |
2465 | ||
2466 | ||
2467 | ||
2468 | /*-------------------------------------------------------------------* | |
2469 | * claw_stats * | |
2470 | *-------------------------------------------------------------------*/ | |
2471 | ||
2472 | static struct | |
2473 | net_device_stats *claw_stats(struct net_device *dev) | |
2474 | { | |
2475 | struct claw_privbk *privptr; | |
b805da74 AR |
2476 | |
2477 | CLAW_DBF_TEXT(4, trace, "stats"); | |
6951df34 | 2478 | privptr = dev->ml_priv; |
1da177e4 LT |
2479 | return &privptr->stats; |
2480 | } /* end of claw_stats */ | |
2481 | ||
2482 | ||
2483 | /*-------------------------------------------------------------------* | |
2484 | * unpack_read * | |
2485 | * * | |
2486 | *--------------------------------------------------------------------*/ | |
2487 | static void | |
2488 | unpack_read(struct net_device *dev ) | |
2489 | { | |
2490 | struct sk_buff *skb; | |
2491 | struct claw_privbk *privptr; | |
2492 | struct claw_env *p_env; | |
2493 | struct ccwbk *p_this_ccw; | |
2494 | struct ccwbk *p_first_ccw; | |
2495 | struct ccwbk *p_last_ccw; | |
2496 | struct clawph *p_packh; | |
2497 | void *p_packd; | |
2498 | struct clawctl *p_ctlrec=NULL; | |
b805da74 | 2499 | struct device *p_dev; |
1da177e4 LT |
2500 | |
2501 | __u32 len_of_data; | |
2502 | __u32 pack_off; | |
2503 | __u8 link_num; | |
2504 | __u8 mtc_this_frm=0; | |
2505 | __u32 bytes_to_mov; | |
1da177e4 LT |
2506 | int i=0; |
2507 | int p=0; | |
2508 | ||
b805da74 | 2509 | CLAW_DBF_TEXT(4, trace, "unpkread"); |
1da177e4 LT |
2510 | p_first_ccw=NULL; |
2511 | p_last_ccw=NULL; | |
2512 | p_packh=NULL; | |
2513 | p_packd=NULL; | |
6951df34 | 2514 | privptr = dev->ml_priv; |
b805da74 AR |
2515 | |
2516 | p_dev = &privptr->channel[READ].cdev->dev; | |
1da177e4 LT |
2517 | p_env = privptr->p_env; |
2518 | p_this_ccw=privptr->p_read_active_first; | |
1da177e4 | 2519 | while (p_this_ccw!=NULL && p_this_ccw->header.flag!=CLAW_PENDING) { |
1da177e4 LT |
2520 | pack_off = 0; |
2521 | p = 0; | |
2522 | p_this_ccw->header.flag=CLAW_PENDING; | |
2523 | privptr->p_read_active_first=p_this_ccw->next; | |
2524 | p_this_ccw->next=NULL; | |
2525 | p_packh = (struct clawph *)p_this_ccw->p_buffer; | |
2526 | if ((p_env->packing == PACK_SEND) && | |
2527 | (p_packh->len == 32) && | |
2528 | (p_packh->link_num == 0)) { /* is it a packed ctl rec? */ | |
2529 | p_packh++; /* peek past pack header */ | |
2530 | p_ctlrec = (struct clawctl *)p_packh; | |
2531 | p_packh--; /* un peek */ | |
2532 | if ((p_ctlrec->command == CONNECTION_RESPONSE) || | |
2533 | (p_ctlrec->command == CONNECTION_CONFIRM)) | |
2534 | p_env->packing = DO_PACKED; | |
2535 | } | |
2536 | if (p_env->packing == DO_PACKED) | |
2537 | link_num=p_packh->link_num; | |
2538 | else | |
2539 | link_num=p_this_ccw->header.opcode / 8; | |
2540 | if ((p_this_ccw->header.opcode & MORE_to_COME_FLAG)!=0) { | |
1da177e4 LT |
2541 | mtc_this_frm=1; |
2542 | if (p_this_ccw->header.length!= | |
2543 | privptr->p_env->read_size ) { | |
4811fcb7 AR |
2544 | dev_warn(p_dev, |
2545 | "The communication peer of %s" | |
2546 | " sent a faulty" | |
2547 | " frame of length %02x\n", | |
1da177e4 LT |
2548 | dev->name, p_this_ccw->header.length); |
2549 | } | |
2550 | } | |
2551 | ||
2552 | if (privptr->mtc_skipping) { | |
2553 | /* | |
2554 | * We're in the mode of skipping past a | |
2555 | * multi-frame message | |
2556 | * that we can't process for some reason or other. | |
2557 | * The first frame without the More-To-Come flag is | |
2558 | * the last frame of the skipped message. | |
2559 | */ | |
2560 | /* in case of More-To-Come not set in this frame */ | |
2561 | if (mtc_this_frm==0) { | |
2562 | privptr->mtc_skipping=0; /* Ok, the end */ | |
2563 | privptr->mtc_logical_link=-1; | |
2564 | } | |
1da177e4 LT |
2565 | goto NextFrame; |
2566 | } | |
2567 | ||
2568 | if (link_num==0) { | |
2569 | claw_process_control(dev, p_this_ccw); | |
b805da74 | 2570 | CLAW_DBF_TEXT(4, trace, "UnpkCntl"); |
1da177e4 LT |
2571 | goto NextFrame; |
2572 | } | |
2573 | unpack_next: | |
2574 | if (p_env->packing == DO_PACKED) { | |
2575 | if (pack_off > p_env->read_size) | |
2576 | goto NextFrame; | |
2577 | p_packd = p_this_ccw->p_buffer+pack_off; | |
2578 | p_packh = (struct clawph *) p_packd; | |
4811fcb7 | 2579 | if ((p_packh->len == 0) || /* done with this frame? */ |
1da177e4 LT |
2580 | (p_packh->flag != 0)) |
2581 | goto NextFrame; | |
2582 | bytes_to_mov = p_packh->len; | |
2583 | pack_off += bytes_to_mov+sizeof(struct clawph); | |
2584 | p++; | |
2585 | } else { | |
2586 | bytes_to_mov=p_this_ccw->header.length; | |
2587 | } | |
2588 | if (privptr->mtc_logical_link<0) { | |
1da177e4 LT |
2589 | |
2590 | /* | |
2591 | * if More-To-Come is set in this frame then we don't know | |
2592 | * length of entire message, and hence have to allocate | |
2593 | * large buffer */ | |
2594 | ||
2595 | /* We are starting a new envelope */ | |
2596 | privptr->mtc_offset=0; | |
2597 | privptr->mtc_logical_link=link_num; | |
2598 | } | |
2599 | ||
2600 | if (bytes_to_mov > (MAX_ENVELOPE_SIZE- privptr->mtc_offset) ) { | |
2601 | /* error */ | |
1da177e4 LT |
2602 | privptr->stats.rx_frame_errors++; |
2603 | goto NextFrame; | |
2604 | } | |
2605 | if (p_env->packing == DO_PACKED) { | |
2606 | memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, | |
2607 | p_packd+sizeof(struct clawph), bytes_to_mov); | |
2608 | ||
2609 | } else { | |
2610 | memcpy( privptr->p_mtc_envelope+ privptr->mtc_offset, | |
2611 | p_this_ccw->p_buffer, bytes_to_mov); | |
2612 | } | |
1da177e4 LT |
2613 | if (mtc_this_frm==0) { |
2614 | len_of_data=privptr->mtc_offset+bytes_to_mov; | |
2615 | skb=dev_alloc_skb(len_of_data); | |
2616 | if (skb) { | |
2617 | memcpy(skb_put(skb,len_of_data), | |
2618 | privptr->p_mtc_envelope, | |
2619 | len_of_data); | |
1da177e4 | 2620 | skb->dev=dev; |
98e399f8 | 2621 | skb_reset_mac_header(skb); |
1da177e4 LT |
2622 | skb->protocol=htons(ETH_P_IP); |
2623 | skb->ip_summed=CHECKSUM_UNNECESSARY; | |
2624 | privptr->stats.rx_packets++; | |
2625 | privptr->stats.rx_bytes+=len_of_data; | |
2626 | netif_rx(skb); | |
1da177e4 LT |
2627 | } |
2628 | else { | |
4811fcb7 AR |
2629 | dev_info(p_dev, "Allocating a buffer for" |
2630 | " incoming data failed\n"); | |
1da177e4 | 2631 | privptr->stats.rx_dropped++; |
1da177e4 LT |
2632 | } |
2633 | privptr->mtc_offset=0; | |
2634 | privptr->mtc_logical_link=-1; | |
2635 | } | |
2636 | else { | |
2637 | privptr->mtc_offset+=bytes_to_mov; | |
2638 | } | |
2639 | if (p_env->packing == DO_PACKED) | |
2640 | goto unpack_next; | |
2641 | NextFrame: | |
2642 | /* | |
2643 | * Remove ThisCCWblock from active read queue, and add it | |
2644 | * to queue of free blocks to be reused. | |
2645 | */ | |
2646 | i++; | |
2647 | p_this_ccw->header.length=0xffff; | |
2648 | p_this_ccw->header.opcode=0xff; | |
2649 | /* | |
2650 | * add this one to the free queue for later reuse | |
2651 | */ | |
2652 | if (p_first_ccw==NULL) { | |
2653 | p_first_ccw = p_this_ccw; | |
2654 | } | |
2655 | else { | |
2656 | p_last_ccw->next = p_this_ccw; | |
2657 | } | |
2658 | p_last_ccw = p_this_ccw; | |
2659 | /* | |
2660 | * chain to next block on active read queue | |
2661 | */ | |
2662 | p_this_ccw = privptr->p_read_active_first; | |
b805da74 | 2663 | CLAW_DBF_TEXT_(4, trace, "rxpkt %d", p); |
1da177e4 LT |
2664 | } /* end of while */ |
2665 | ||
2666 | /* check validity */ | |
2667 | ||
b805da74 | 2668 | CLAW_DBF_TEXT_(4, trace, "rxfrm %d", i); |
1da177e4 | 2669 | add_claw_reads(dev, p_first_ccw, p_last_ccw); |
1da177e4 | 2670 | claw_strt_read(dev, LOCK_YES); |
1da177e4 LT |
2671 | return; |
2672 | } /* end of unpack_read */ | |
2673 | ||
2674 | /*-------------------------------------------------------------------* | |
2675 | * claw_strt_read * | |
2676 | * * | |
2677 | *--------------------------------------------------------------------*/ | |
2678 | static void | |
2679 | claw_strt_read (struct net_device *dev, int lock ) | |
2680 | { | |
2681 | int rc = 0; | |
2682 | __u32 parm; | |
2683 | unsigned long saveflags = 0; | |
6951df34 | 2684 | struct claw_privbk *privptr = dev->ml_priv; |
1da177e4 LT |
2685 | struct ccwbk*p_ccwbk; |
2686 | struct chbk *p_ch; | |
2687 | struct clawh *p_clawh; | |
2688 | p_ch=&privptr->channel[READ]; | |
2689 | ||
b805da74 | 2690 | CLAW_DBF_TEXT(4, trace, "StRdNter"); |
1da177e4 LT |
2691 | p_clawh=(struct clawh *)privptr->p_claw_signal_blk; |
2692 | p_clawh->flag=CLAW_IDLE; /* 0x00 */ | |
2693 | ||
2694 | if ((privptr->p_write_active_first!=NULL && | |
2695 | privptr->p_write_active_first->header.flag!=CLAW_PENDING) || | |
2696 | (privptr->p_read_active_first!=NULL && | |
2697 | privptr->p_read_active_first->header.flag!=CLAW_PENDING )) { | |
2698 | p_clawh->flag=CLAW_BUSY; /* 0xff */ | |
2699 | } | |
1da177e4 LT |
2700 | if (lock==LOCK_YES) { |
2701 | spin_lock_irqsave(get_ccwdev_lock(p_ch->cdev), saveflags); | |
2702 | } | |
2703 | if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { | |
b805da74 | 2704 | CLAW_DBF_TEXT(4, trace, "HotRead"); |
1da177e4 LT |
2705 | p_ccwbk=privptr->p_read_active_first; |
2706 | parm = (unsigned long) p_ch; | |
2707 | rc = ccw_device_start (p_ch->cdev, &p_ccwbk->read, parm, | |
2708 | 0xff, 0); | |
2709 | if (rc != 0) { | |
2710 | ccw_check_return_code(p_ch->cdev, rc); | |
2711 | } | |
2712 | } | |
2713 | else { | |
b805da74 | 2714 | CLAW_DBF_TEXT(2, trace, "ReadAct"); |
1da177e4 LT |
2715 | } |
2716 | ||
2717 | if (lock==LOCK_YES) { | |
2718 | spin_unlock_irqrestore(get_ccwdev_lock(p_ch->cdev), saveflags); | |
2719 | } | |
b805da74 | 2720 | CLAW_DBF_TEXT(4, trace, "StRdExit"); |
1da177e4 LT |
2721 | return; |
2722 | } /* end of claw_strt_read */ | |
2723 | ||
2724 | /*-------------------------------------------------------------------* | |
2725 | * claw_strt_out_IO * | |
2726 | * * | |
2727 | *--------------------------------------------------------------------*/ | |
2728 | ||
2729 | static void | |
2730 | claw_strt_out_IO( struct net_device *dev ) | |
2731 | { | |
2732 | int rc = 0; | |
2733 | unsigned long parm; | |
2734 | struct claw_privbk *privptr; | |
2735 | struct chbk *p_ch; | |
2736 | struct ccwbk *p_first_ccw; | |
2737 | ||
1da177e4 LT |
2738 | if (!dev) { |
2739 | return; | |
2740 | } | |
6951df34 | 2741 | privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
2742 | p_ch=&privptr->channel[WRITE]; |
2743 | ||
b805da74 | 2744 | CLAW_DBF_TEXT(4, trace, "strt_io"); |
1da177e4 LT |
2745 | p_first_ccw=privptr->p_write_active_first; |
2746 | ||
2747 | if (p_ch->claw_state == CLAW_STOP) | |
2748 | return; | |
2749 | if (p_first_ccw == NULL) { | |
1da177e4 LT |
2750 | return; |
2751 | } | |
2752 | if (test_and_set_bit(0, (void *)&p_ch->IO_active) == 0) { | |
2753 | parm = (unsigned long) p_ch; | |
b805da74 | 2754 | CLAW_DBF_TEXT(2, trace, "StWrtIO"); |
4811fcb7 AR |
2755 | rc = ccw_device_start(p_ch->cdev, &p_first_ccw->write, parm, |
2756 | 0xff, 0); | |
1da177e4 LT |
2757 | if (rc != 0) { |
2758 | ccw_check_return_code(p_ch->cdev, rc); | |
2759 | } | |
2760 | } | |
2761 | dev->trans_start = jiffies; | |
1da177e4 LT |
2762 | return; |
2763 | } /* end of claw_strt_out_IO */ | |
2764 | ||
2765 | /*-------------------------------------------------------------------* | |
2766 | * Free write buffers * | |
2767 | * * | |
2768 | *--------------------------------------------------------------------*/ | |
2769 | ||
2770 | static void | |
2771 | claw_free_wrt_buf( struct net_device *dev ) | |
2772 | { | |
2773 | ||
6951df34 | 2774 | struct claw_privbk *privptr = (struct claw_privbk *)dev->ml_priv; |
1da177e4 LT |
2775 | struct ccwbk*p_first_ccw; |
2776 | struct ccwbk*p_last_ccw; | |
2777 | struct ccwbk*p_this_ccw; | |
2778 | struct ccwbk*p_next_ccw; | |
b805da74 AR |
2779 | |
2780 | CLAW_DBF_TEXT(4, trace, "freewrtb"); | |
1da177e4 LT |
2781 | /* scan the write queue to free any completed write packets */ |
2782 | p_first_ccw=NULL; | |
2783 | p_last_ccw=NULL; | |
1da177e4 LT |
2784 | p_this_ccw=privptr->p_write_active_first; |
2785 | while ( (p_this_ccw!=NULL) && (p_this_ccw->header.flag!=CLAW_PENDING)) | |
2786 | { | |
2787 | p_next_ccw = p_this_ccw->next; | |
2788 | if (((p_next_ccw!=NULL) && | |
2789 | (p_next_ccw->header.flag!=CLAW_PENDING)) || | |
2790 | ((p_this_ccw == privptr->p_write_active_last) && | |
2791 | (p_this_ccw->header.flag!=CLAW_PENDING))) { | |
2792 | /* The next CCW is OK or this is */ | |
2793 | /* the last CCW...free it @A1A */ | |
2794 | privptr->p_write_active_first=p_this_ccw->next; | |
2795 | p_this_ccw->header.flag=CLAW_PENDING; | |
2796 | p_this_ccw->next=privptr->p_write_free_chain; | |
2797 | privptr->p_write_free_chain=p_this_ccw; | |
2798 | ++privptr->write_free_count; | |
2799 | privptr->stats.tx_bytes+= p_this_ccw->write.count; | |
2800 | p_this_ccw=privptr->p_write_active_first; | |
2801 | privptr->stats.tx_packets++; | |
2802 | } | |
2803 | else { | |
2804 | break; | |
2805 | } | |
2806 | } | |
2807 | if (privptr->write_free_count!=0) { | |
2808 | claw_clearbit_busy(TB_NOBUFFER,dev); | |
2809 | } | |
2810 | /* whole chain removed? */ | |
2811 | if (privptr->p_write_active_first==NULL) { | |
2812 | privptr->p_write_active_last=NULL; | |
1da177e4 | 2813 | } |
b805da74 | 2814 | CLAW_DBF_TEXT_(4, trace, "FWC=%d", privptr->write_free_count); |
1da177e4 LT |
2815 | return; |
2816 | } | |
2817 | ||
2818 | /*-------------------------------------------------------------------* | |
2819 | * claw free netdevice * | |
2820 | * * | |
2821 | *--------------------------------------------------------------------*/ | |
2822 | static void | |
2823 | claw_free_netdevice(struct net_device * dev, int free_dev) | |
2824 | { | |
2825 | struct claw_privbk *privptr; | |
1da177e4 | 2826 | |
b805da74 | 2827 | CLAW_DBF_TEXT(2, setup, "free_dev"); |
1da177e4 LT |
2828 | if (!dev) |
2829 | return; | |
b805da74 | 2830 | CLAW_DBF_TEXT_(2, setup, "%s", dev->name); |
6951df34 | 2831 | privptr = dev->ml_priv; |
1da177e4 LT |
2832 | if (dev->flags & IFF_RUNNING) |
2833 | claw_release(dev); | |
2834 | if (privptr) { | |
2835 | privptr->channel[READ].ndev = NULL; /* say it's free */ | |
2836 | } | |
6951df34 | 2837 | dev->ml_priv = NULL; |
1da177e4 LT |
2838 | #ifdef MODULE |
2839 | if (free_dev) { | |
2840 | free_netdev(dev); | |
2841 | } | |
2842 | #endif | |
b805da74 | 2843 | CLAW_DBF_TEXT(2, setup, "free_ok"); |
1da177e4 LT |
2844 | } |
2845 | ||
2846 | /** | |
2847 | * Claw init netdevice | |
2848 | * Initialize everything of the net device except the name and the | |
2849 | * channel structs. | |
2850 | */ | |
2171dc18 FB |
2851 | static const struct net_device_ops claw_netdev_ops = { |
2852 | .ndo_open = claw_open, | |
2853 | .ndo_stop = claw_release, | |
2854 | .ndo_get_stats = claw_stats, | |
2855 | .ndo_start_xmit = claw_tx, | |
2856 | .ndo_change_mtu = claw_change_mtu, | |
2857 | }; | |
2858 | ||
1da177e4 LT |
2859 | static void |
2860 | claw_init_netdevice(struct net_device * dev) | |
2861 | { | |
b805da74 AR |
2862 | CLAW_DBF_TEXT(2, setup, "init_dev"); |
2863 | CLAW_DBF_TEXT_(2, setup, "%s", dev->name); | |
1da177e4 | 2864 | dev->mtu = CLAW_DEFAULT_MTU_SIZE; |
1da177e4 LT |
2865 | dev->hard_header_len = 0; |
2866 | dev->addr_len = 0; | |
2867 | dev->type = ARPHRD_SLIP; | |
2868 | dev->tx_queue_len = 1300; | |
2869 | dev->flags = IFF_POINTOPOINT | IFF_NOARP; | |
2171dc18 | 2870 | dev->netdev_ops = &claw_netdev_ops; |
b805da74 | 2871 | CLAW_DBF_TEXT(2, setup, "initok"); |
1da177e4 LT |
2872 | return; |
2873 | } | |
2874 | ||
2875 | /** | |
2876 | * Init a new channel in the privptr->channel[i]. | |
2877 | * | |
2878 | * @param cdev The ccw_device to be added. | |
2879 | * | |
2880 | * @return 0 on success, !0 on error. | |
2881 | */ | |
2882 | static int | |
2883 | add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr) | |
2884 | { | |
2885 | struct chbk *p_ch; | |
dc5bc0ca | 2886 | struct ccw_dev_id dev_id; |
1da177e4 | 2887 | |
2a0217d5 | 2888 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cdev->dev)); |
1da177e4 LT |
2889 | privptr->channel[i].flag = i+1; /* Read is 1 Write is 2 */ |
2890 | p_ch = &privptr->channel[i]; | |
2891 | p_ch->cdev = cdev; | |
2a0217d5 | 2892 | snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", dev_name(&cdev->dev)); |
dc5bc0ca CH |
2893 | ccw_device_get_id(cdev, &dev_id); |
2894 | p_ch->devno = dev_id.devno; | |
dd00cc48 | 2895 | if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) { |
1da177e4 LT |
2896 | return -ENOMEM; |
2897 | } | |
1da177e4 LT |
2898 | return 0; |
2899 | } | |
2900 | ||
2901 | ||
2902 | /** | |
2903 | * | |
2904 | * Setup an interface. | |
2905 | * | |
2906 | * @param cgdev Device to be setup. | |
2907 | * | |
2908 | * @returns 0 on success, !0 on failure. | |
2909 | */ | |
2910 | static int | |
2911 | claw_new_device(struct ccwgroup_device *cgdev) | |
2912 | { | |
2913 | struct claw_privbk *privptr; | |
2914 | struct claw_env *p_env; | |
2915 | struct net_device *dev; | |
2916 | int ret; | |
dc5bc0ca | 2917 | struct ccw_dev_id dev_id; |
1da177e4 | 2918 | |
4811fcb7 AR |
2919 | dev_info(&cgdev->dev, "add for %s\n", |
2920 | dev_name(&cgdev->cdev[READ]->dev)); | |
b805da74 | 2921 | CLAW_DBF_TEXT(2, setup, "new_dev"); |
dff59b64 GKH |
2922 | privptr = dev_get_drvdata(&cgdev->dev); |
2923 | dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr); | |
2924 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr); | |
1da177e4 LT |
2925 | if (!privptr) |
2926 | return -ENODEV; | |
2927 | p_env = privptr->p_env; | |
dc5bc0ca CH |
2928 | ccw_device_get_id(cgdev->cdev[READ], &dev_id); |
2929 | p_env->devno[READ] = dev_id.devno; | |
2930 | ccw_device_get_id(cgdev->cdev[WRITE], &dev_id); | |
2931 | p_env->devno[WRITE] = dev_id.devno; | |
1da177e4 LT |
2932 | ret = add_channel(cgdev->cdev[0],0,privptr); |
2933 | if (ret == 0) | |
2934 | ret = add_channel(cgdev->cdev[1],1,privptr); | |
2935 | if (ret != 0) { | |
4811fcb7 AR |
2936 | dev_warn(&cgdev->dev, "Creating a CLAW group device" |
2937 | " failed with error code %d\n", ret); | |
b805da74 | 2938 | goto out; |
1da177e4 LT |
2939 | } |
2940 | ret = ccw_device_set_online(cgdev->cdev[READ]); | |
2941 | if (ret != 0) { | |
4811fcb7 AR |
2942 | dev_warn(&cgdev->dev, |
2943 | "Setting the read subchannel online" | |
2944 | " failed with error code %d\n", ret); | |
1da177e4 LT |
2945 | goto out; |
2946 | } | |
2947 | ret = ccw_device_set_online(cgdev->cdev[WRITE]); | |
2948 | if (ret != 0) { | |
4811fcb7 AR |
2949 | dev_warn(&cgdev->dev, |
2950 | "Setting the write subchannel online " | |
2951 | "failed with error code %d\n", ret); | |
1da177e4 LT |
2952 | goto out; |
2953 | } | |
2954 | dev = alloc_netdev(0,"claw%d",claw_init_netdevice); | |
2955 | if (!dev) { | |
4811fcb7 AR |
2956 | dev_warn(&cgdev->dev, |
2957 | "Activating the CLAW device failed\n"); | |
1da177e4 LT |
2958 | goto out; |
2959 | } | |
6951df34 | 2960 | dev->ml_priv = privptr; |
dff59b64 GKH |
2961 | dev_set_drvdata(&cgdev->dev, privptr); |
2962 | dev_set_drvdata(&cgdev->cdev[READ]->dev, privptr); | |
2963 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, privptr); | |
1da177e4 LT |
2964 | /* sysfs magic */ |
2965 | SET_NETDEV_DEV(dev, &cgdev->dev); | |
2966 | if (register_netdev(dev) != 0) { | |
2967 | claw_free_netdevice(dev, 1); | |
b805da74 | 2968 | CLAW_DBF_TEXT(2, trace, "regfail"); |
1da177e4 LT |
2969 | goto out; |
2970 | } | |
2971 | dev->flags &=~IFF_RUNNING; | |
2972 | if (privptr->buffs_alloc == 0) { | |
2973 | ret=init_ccw_bk(dev); | |
2974 | if (ret !=0) { | |
1da177e4 LT |
2975 | unregister_netdev(dev); |
2976 | claw_free_netdevice(dev,1); | |
b805da74 | 2977 | CLAW_DBF_TEXT(2, trace, "ccwmem"); |
1da177e4 LT |
2978 | goto out; |
2979 | } | |
2980 | } | |
2981 | privptr->channel[READ].ndev = dev; | |
2982 | privptr->channel[WRITE].ndev = dev; | |
2983 | privptr->p_env->ndev = dev; | |
2984 | ||
4811fcb7 | 2985 | dev_info(&cgdev->dev, "%s:readsize=%d writesize=%d " |
1da177e4 LT |
2986 | "readbuffer=%d writebuffer=%d read=0x%04x write=0x%04x\n", |
2987 | dev->name, p_env->read_size, | |
2988 | p_env->write_size, p_env->read_buffers, | |
2989 | p_env->write_buffers, p_env->devno[READ], | |
2990 | p_env->devno[WRITE]); | |
4811fcb7 | 2991 | dev_info(&cgdev->dev, "%s:host_name:%.8s, adapter_name " |
1da177e4 LT |
2992 | ":%.8s api_type: %.8s\n", |
2993 | dev->name, p_env->host_name, | |
2994 | p_env->adapter_name , p_env->api_type); | |
2995 | return 0; | |
2996 | out: | |
2997 | ccw_device_set_offline(cgdev->cdev[1]); | |
2998 | ccw_device_set_offline(cgdev->cdev[0]); | |
1da177e4 LT |
2999 | return -ENODEV; |
3000 | } | |
3001 | ||
3002 | static void | |
3003 | claw_purge_skb_queue(struct sk_buff_head *q) | |
3004 | { | |
3005 | struct sk_buff *skb; | |
3006 | ||
b805da74 | 3007 | CLAW_DBF_TEXT(4, trace, "purgque"); |
1da177e4 LT |
3008 | while ((skb = skb_dequeue(q))) { |
3009 | atomic_dec(&skb->users); | |
8e84c801 | 3010 | dev_kfree_skb_any(skb); |
1da177e4 LT |
3011 | } |
3012 | } | |
3013 | ||
3014 | /** | |
3015 | * Shutdown an interface. | |
3016 | * | |
3017 | * @param cgdev Device to be shut down. | |
3018 | * | |
3019 | * @returns 0 on success, !0 on failure. | |
3020 | */ | |
3021 | static int | |
3022 | claw_shutdown_device(struct ccwgroup_device *cgdev) | |
3023 | { | |
3024 | struct claw_privbk *priv; | |
3025 | struct net_device *ndev; | |
3026 | int ret; | |
3027 | ||
b9d3aed7 | 3028 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); |
dff59b64 | 3029 | priv = dev_get_drvdata(&cgdev->dev); |
1da177e4 LT |
3030 | if (!priv) |
3031 | return -ENODEV; | |
3032 | ndev = priv->channel[READ].ndev; | |
3033 | if (ndev) { | |
3034 | /* Close the device */ | |
4811fcb7 AR |
3035 | dev_info(&cgdev->dev, "%s: shutting down \n", |
3036 | ndev->name); | |
1da177e4 LT |
3037 | if (ndev->flags & IFF_RUNNING) |
3038 | ret = claw_release(ndev); | |
3039 | ndev->flags &=~IFF_RUNNING; | |
3040 | unregister_netdev(ndev); | |
6951df34 | 3041 | ndev->ml_priv = NULL; /* cgdev data, not ndev's to free */ |
1da177e4 LT |
3042 | claw_free_netdevice(ndev, 1); |
3043 | priv->channel[READ].ndev = NULL; | |
3044 | priv->channel[WRITE].ndev = NULL; | |
3045 | priv->p_env->ndev = NULL; | |
3046 | } | |
3047 | ccw_device_set_offline(cgdev->cdev[1]); | |
3048 | ccw_device_set_offline(cgdev->cdev[0]); | |
3049 | return 0; | |
3050 | } | |
3051 | ||
3052 | static void | |
3053 | claw_remove_device(struct ccwgroup_device *cgdev) | |
3054 | { | |
3055 | struct claw_privbk *priv; | |
3056 | ||
b805da74 | 3057 | BUG_ON(!cgdev); |
b9d3aed7 | 3058 | CLAW_DBF_TEXT_(2, setup, "%s", dev_name(&cgdev->dev)); |
dff59b64 | 3059 | priv = dev_get_drvdata(&cgdev->dev); |
b805da74 | 3060 | BUG_ON(!priv); |
4811fcb7 | 3061 | dev_info(&cgdev->dev, " will be removed.\n"); |
1da177e4 LT |
3062 | if (cgdev->state == CCWGROUP_ONLINE) |
3063 | claw_shutdown_device(cgdev); | |
3064 | claw_remove_files(&cgdev->dev); | |
17fd682e JJ |
3065 | kfree(priv->p_mtc_envelope); |
3066 | priv->p_mtc_envelope=NULL; | |
3067 | kfree(priv->p_env); | |
3068 | priv->p_env=NULL; | |
3069 | kfree(priv->channel[0].irb); | |
3070 | priv->channel[0].irb=NULL; | |
3071 | kfree(priv->channel[1].irb); | |
3072 | priv->channel[1].irb=NULL; | |
1da177e4 | 3073 | kfree(priv); |
dff59b64 GKH |
3074 | dev_set_drvdata(&cgdev->dev, NULL); |
3075 | dev_set_drvdata(&cgdev->cdev[READ]->dev, NULL); | |
3076 | dev_set_drvdata(&cgdev->cdev[WRITE]->dev, NULL); | |
1da177e4 | 3077 | put_device(&cgdev->dev); |
b805da74 AR |
3078 | |
3079 | return; | |
1da177e4 LT |
3080 | } |
3081 | ||
3082 | ||
3083 | /* | |
3084 | * sysfs attributes | |
3085 | */ | |
3086 | static ssize_t | |
3fd3c0a5 | 3087 | claw_hname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3088 | { |
3089 | struct claw_privbk *priv; | |
3090 | struct claw_env * p_env; | |
3091 | ||
dff59b64 | 3092 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3093 | if (!priv) |
3094 | return -ENODEV; | |
3095 | p_env = priv->p_env; | |
3096 | return sprintf(buf, "%s\n",p_env->host_name); | |
3097 | } | |
3098 | ||
3099 | static ssize_t | |
4811fcb7 AR |
3100 | claw_hname_write(struct device *dev, struct device_attribute *attr, |
3101 | const char *buf, size_t count) | |
1da177e4 LT |
3102 | { |
3103 | struct claw_privbk *priv; | |
3104 | struct claw_env * p_env; | |
3105 | ||
dff59b64 | 3106 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3107 | if (!priv) |
3108 | return -ENODEV; | |
3109 | p_env = priv->p_env; | |
3110 | if (count > MAX_NAME_LEN+1) | |
3111 | return -EINVAL; | |
3112 | memset(p_env->host_name, 0x20, MAX_NAME_LEN); | |
3113 | strncpy(p_env->host_name,buf, count); | |
3114 | p_env->host_name[count-1] = 0x20; /* clear extra 0x0a */ | |
3115 | p_env->host_name[MAX_NAME_LEN] = 0x00; | |
b805da74 AR |
3116 | CLAW_DBF_TEXT(2, setup, "HstnSet"); |
3117 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->host_name); | |
1da177e4 LT |
3118 | |
3119 | return count; | |
3120 | } | |
3121 | ||
3122 | static DEVICE_ATTR(host_name, 0644, claw_hname_show, claw_hname_write); | |
3123 | ||
3124 | static ssize_t | |
3fd3c0a5 | 3125 | claw_adname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3126 | { |
3127 | struct claw_privbk *priv; | |
3128 | struct claw_env * p_env; | |
3129 | ||
dff59b64 | 3130 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3131 | if (!priv) |
3132 | return -ENODEV; | |
3133 | p_env = priv->p_env; | |
b805da74 | 3134 | return sprintf(buf, "%s\n", p_env->adapter_name); |
1da177e4 LT |
3135 | } |
3136 | ||
3137 | static ssize_t | |
4811fcb7 AR |
3138 | claw_adname_write(struct device *dev, struct device_attribute *attr, |
3139 | const char *buf, size_t count) | |
1da177e4 LT |
3140 | { |
3141 | struct claw_privbk *priv; | |
3142 | struct claw_env * p_env; | |
3143 | ||
dff59b64 | 3144 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3145 | if (!priv) |
3146 | return -ENODEV; | |
3147 | p_env = priv->p_env; | |
3148 | if (count > MAX_NAME_LEN+1) | |
3149 | return -EINVAL; | |
3150 | memset(p_env->adapter_name, 0x20, MAX_NAME_LEN); | |
3151 | strncpy(p_env->adapter_name,buf, count); | |
3152 | p_env->adapter_name[count-1] = 0x20; /* clear extra 0x0a */ | |
3153 | p_env->adapter_name[MAX_NAME_LEN] = 0x00; | |
b805da74 AR |
3154 | CLAW_DBF_TEXT(2, setup, "AdnSet"); |
3155 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->adapter_name); | |
1da177e4 LT |
3156 | |
3157 | return count; | |
3158 | } | |
3159 | ||
3160 | static DEVICE_ATTR(adapter_name, 0644, claw_adname_show, claw_adname_write); | |
3161 | ||
3162 | static ssize_t | |
3fd3c0a5 | 3163 | claw_apname_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3164 | { |
3165 | struct claw_privbk *priv; | |
3166 | struct claw_env * p_env; | |
3167 | ||
dff59b64 | 3168 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3169 | if (!priv) |
3170 | return -ENODEV; | |
3171 | p_env = priv->p_env; | |
3172 | return sprintf(buf, "%s\n", | |
3173 | p_env->api_type); | |
3174 | } | |
3175 | ||
3176 | static ssize_t | |
4811fcb7 AR |
3177 | claw_apname_write(struct device *dev, struct device_attribute *attr, |
3178 | const char *buf, size_t count) | |
1da177e4 LT |
3179 | { |
3180 | struct claw_privbk *priv; | |
3181 | struct claw_env * p_env; | |
3182 | ||
dff59b64 | 3183 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3184 | if (!priv) |
3185 | return -ENODEV; | |
3186 | p_env = priv->p_env; | |
3187 | if (count > MAX_NAME_LEN+1) | |
3188 | return -EINVAL; | |
3189 | memset(p_env->api_type, 0x20, MAX_NAME_LEN); | |
3190 | strncpy(p_env->api_type,buf, count); | |
3191 | p_env->api_type[count-1] = 0x20; /* we get a loose 0x0a */ | |
3192 | p_env->api_type[MAX_NAME_LEN] = 0x00; | |
3193 | if(strncmp(p_env->api_type,WS_APPL_NAME_PACKED,6) == 0) { | |
3194 | p_env->read_size=DEF_PACK_BUFSIZE; | |
3195 | p_env->write_size=DEF_PACK_BUFSIZE; | |
3196 | p_env->packing=PACKING_ASK; | |
b805da74 | 3197 | CLAW_DBF_TEXT(2, setup, "PACKING"); |
1da177e4 LT |
3198 | } |
3199 | else { | |
3200 | p_env->packing=0; | |
3201 | p_env->read_size=CLAW_FRAME_SIZE; | |
3202 | p_env->write_size=CLAW_FRAME_SIZE; | |
b805da74 | 3203 | CLAW_DBF_TEXT(2, setup, "ApiSet"); |
1da177e4 | 3204 | } |
b805da74 | 3205 | CLAW_DBF_TEXT_(2, setup, "%s", p_env->api_type); |
1da177e4 LT |
3206 | return count; |
3207 | } | |
3208 | ||
3209 | static DEVICE_ATTR(api_type, 0644, claw_apname_show, claw_apname_write); | |
3210 | ||
3211 | static ssize_t | |
3fd3c0a5 | 3212 | claw_wbuff_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3213 | { |
3214 | struct claw_privbk *priv; | |
3215 | struct claw_env * p_env; | |
3216 | ||
dff59b64 | 3217 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3218 | if (!priv) |
3219 | return -ENODEV; | |
3220 | p_env = priv->p_env; | |
3221 | return sprintf(buf, "%d\n", p_env->write_buffers); | |
3222 | } | |
3223 | ||
3224 | static ssize_t | |
4811fcb7 AR |
3225 | claw_wbuff_write(struct device *dev, struct device_attribute *attr, |
3226 | const char *buf, size_t count) | |
1da177e4 LT |
3227 | { |
3228 | struct claw_privbk *priv; | |
3229 | struct claw_env * p_env; | |
3230 | int nnn,max; | |
3231 | ||
dff59b64 | 3232 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3233 | if (!priv) |
3234 | return -ENODEV; | |
3235 | p_env = priv->p_env; | |
3236 | sscanf(buf, "%i", &nnn); | |
3237 | if (p_env->packing) { | |
3238 | max = 64; | |
3239 | } | |
3240 | else { | |
3241 | max = 512; | |
3242 | } | |
3243 | if ((nnn > max ) || (nnn < 2)) | |
3244 | return -EINVAL; | |
3245 | p_env->write_buffers = nnn; | |
b805da74 AR |
3246 | CLAW_DBF_TEXT(2, setup, "Wbufset"); |
3247 | CLAW_DBF_TEXT_(2, setup, "WB=%d", p_env->write_buffers); | |
1da177e4 LT |
3248 | return count; |
3249 | } | |
3250 | ||
3251 | static DEVICE_ATTR(write_buffer, 0644, claw_wbuff_show, claw_wbuff_write); | |
3252 | ||
3253 | static ssize_t | |
3fd3c0a5 | 3254 | claw_rbuff_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
3255 | { |
3256 | struct claw_privbk *priv; | |
3257 | struct claw_env * p_env; | |
3258 | ||
dff59b64 | 3259 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3260 | if (!priv) |
3261 | return -ENODEV; | |
3262 | p_env = priv->p_env; | |
3263 | return sprintf(buf, "%d\n", p_env->read_buffers); | |
3264 | } | |
3265 | ||
3266 | static ssize_t | |
4811fcb7 AR |
3267 | claw_rbuff_write(struct device *dev, struct device_attribute *attr, |
3268 | const char *buf, size_t count) | |
1da177e4 LT |
3269 | { |
3270 | struct claw_privbk *priv; | |
3271 | struct claw_env *p_env; | |
3272 | int nnn,max; | |
3273 | ||
dff59b64 | 3274 | priv = dev_get_drvdata(dev); |
1da177e4 LT |
3275 | if (!priv) |
3276 | return -ENODEV; | |
3277 | p_env = priv->p_env; | |
3278 | sscanf(buf, "%i", &nnn); | |
3279 | if (p_env->packing) { | |
3280 | max = 64; | |
3281 | } | |
3282 | else { | |
3283 | max = 512; | |
3284 | } | |
3285 | if ((nnn > max ) || (nnn < 2)) | |
3286 | return -EINVAL; | |
3287 | p_env->read_buffers = nnn; | |
b805da74 AR |
3288 | CLAW_DBF_TEXT(2, setup, "Rbufset"); |
3289 | CLAW_DBF_TEXT_(2, setup, "RB=%d", p_env->read_buffers); | |
1da177e4 LT |
3290 | return count; |
3291 | } | |
3292 | ||
3293 | static DEVICE_ATTR(read_buffer, 0644, claw_rbuff_show, claw_rbuff_write); | |
3294 | ||
3295 | static struct attribute *claw_attr[] = { | |
3296 | &dev_attr_read_buffer.attr, | |
3297 | &dev_attr_write_buffer.attr, | |
3298 | &dev_attr_adapter_name.attr, | |
3299 | &dev_attr_api_type.attr, | |
3300 | &dev_attr_host_name.attr, | |
3301 | NULL, | |
3302 | }; | |
3303 | ||
3304 | static struct attribute_group claw_attr_group = { | |
3305 | .attrs = claw_attr, | |
3306 | }; | |
3307 | ||
3308 | static int | |
3309 | claw_add_files(struct device *dev) | |
3310 | { | |
b805da74 | 3311 | CLAW_DBF_TEXT(2, setup, "add_file"); |
1da177e4 LT |
3312 | return sysfs_create_group(&dev->kobj, &claw_attr_group); |
3313 | } | |
3314 | ||
3315 | static void | |
3316 | claw_remove_files(struct device *dev) | |
3317 | { | |
b805da74 | 3318 | CLAW_DBF_TEXT(2, setup, "rem_file"); |
1da177e4 LT |
3319 | sysfs_remove_group(&dev->kobj, &claw_attr_group); |
3320 | } | |
3321 | ||
3322 | /*--------------------------------------------------------------------* | |
3323 | * claw_init and cleanup * | |
3324 | *---------------------------------------------------------------------*/ | |
3325 | ||
3326 | static void __exit | |
3327 | claw_cleanup(void) | |
3328 | { | |
3329 | unregister_cu3088_discipline(&claw_group_driver); | |
3330 | claw_unregister_debug_facility(); | |
4811fcb7 | 3331 | pr_info("Driver unloaded\n"); |
1da177e4 LT |
3332 | |
3333 | } | |
3334 | ||
3335 | /** | |
3336 | * Initialize module. | |
3337 | * This is called just after the module is loaded. | |
3338 | * | |
3339 | * @return 0 on success, !0 on error. | |
3340 | */ | |
3341 | static int __init | |
3342 | claw_init(void) | |
3343 | { | |
3344 | int ret = 0; | |
1da177e4 | 3345 | |
4811fcb7 | 3346 | pr_info("Loading %s\n", version); |
1da177e4 LT |
3347 | ret = claw_register_debug_facility(); |
3348 | if (ret) { | |
4811fcb7 AR |
3349 | pr_err("Registering with the S/390 debug feature" |
3350 | " failed with error code %d\n", ret); | |
1da177e4 LT |
3351 | return ret; |
3352 | } | |
b805da74 | 3353 | CLAW_DBF_TEXT(2, setup, "init_mod"); |
1da177e4 LT |
3354 | ret = register_cu3088_discipline(&claw_group_driver); |
3355 | if (ret) { | |
b805da74 | 3356 | CLAW_DBF_TEXT(2, setup, "init_bad"); |
1da177e4 | 3357 | claw_unregister_debug_facility(); |
4811fcb7 AR |
3358 | pr_err("Registering with the cu3088 device driver failed " |
3359 | "with error code %d\n", ret); | |
1da177e4 | 3360 | } |
1da177e4 LT |
3361 | return ret; |
3362 | } | |
3363 | ||
3364 | module_init(claw_init); | |
3365 | module_exit(claw_cleanup); | |
3366 | ||
b805da74 AR |
3367 | MODULE_AUTHOR("Andy Richter <richtera@us.ibm.com>"); |
3368 | MODULE_DESCRIPTION("Linux for System z CLAW Driver\n" \ | |
3369 | "Copyright 2000,2008 IBM Corporation\n"); | |
3370 | MODULE_LICENSE("GPL"); |