Commit | Line | Data |
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779e6e1c JG |
1 | /* |
2 | * linux/drivers/s390/cio/qdio_main.c | |
3 | * | |
4 | * Linux for s390 qdio support, buffer handling, qdio API and module support. | |
5 | * | |
6 | * Copyright 2000,2008 IBM Corp. | |
7 | * Author(s): Utz Bacher <utz.bacher@de.ibm.com> | |
8 | * Jan Glauber <jang@linux.vnet.ibm.com> | |
9 | * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com> | |
10 | */ | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/timer.h> | |
15 | #include <linux/delay.h> | |
16 | #include <asm/atomic.h> | |
17 | #include <asm/debug.h> | |
18 | #include <asm/qdio.h> | |
19 | ||
20 | #include "cio.h" | |
21 | #include "css.h" | |
22 | #include "device.h" | |
23 | #include "qdio.h" | |
24 | #include "qdio_debug.h" | |
25 | #include "qdio_perf.h" | |
26 | ||
27 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\ | |
28 | "Jan Glauber <jang@linux.vnet.ibm.com>"); | |
29 | MODULE_DESCRIPTION("QDIO base support"); | |
30 | MODULE_LICENSE("GPL"); | |
31 | ||
32 | static inline int do_siga_sync(struct subchannel_id schid, | |
33 | unsigned int out_mask, unsigned int in_mask) | |
34 | { | |
35 | register unsigned long __fc asm ("0") = 2; | |
36 | register struct subchannel_id __schid asm ("1") = schid; | |
37 | register unsigned long out asm ("2") = out_mask; | |
38 | register unsigned long in asm ("3") = in_mask; | |
39 | int cc; | |
40 | ||
41 | asm volatile( | |
42 | " siga 0\n" | |
43 | " ipm %0\n" | |
44 | " srl %0,28\n" | |
45 | : "=d" (cc) | |
46 | : "d" (__fc), "d" (__schid), "d" (out), "d" (in) : "cc"); | |
47 | return cc; | |
48 | } | |
49 | ||
50 | static inline int do_siga_input(struct subchannel_id schid, unsigned int mask) | |
51 | { | |
52 | register unsigned long __fc asm ("0") = 1; | |
53 | register struct subchannel_id __schid asm ("1") = schid; | |
54 | register unsigned long __mask asm ("2") = mask; | |
55 | int cc; | |
56 | ||
57 | asm volatile( | |
58 | " siga 0\n" | |
59 | " ipm %0\n" | |
60 | " srl %0,28\n" | |
61 | : "=d" (cc) | |
62 | : "d" (__fc), "d" (__schid), "d" (__mask) : "cc", "memory"); | |
63 | return cc; | |
64 | } | |
65 | ||
66 | /** | |
67 | * do_siga_output - perform SIGA-w/wt function | |
68 | * @schid: subchannel id or in case of QEBSM the subchannel token | |
69 | * @mask: which output queues to process | |
70 | * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer | |
71 | * @fc: function code to perform | |
72 | * | |
73 | * Returns cc or QDIO_ERROR_SIGA_ACCESS_EXCEPTION. | |
74 | * Note: For IQDC unicast queues only the highest priority queue is processed. | |
75 | */ | |
76 | static inline int do_siga_output(unsigned long schid, unsigned long mask, | |
77 | u32 *bb, unsigned int fc) | |
78 | { | |
79 | register unsigned long __fc asm("0") = fc; | |
80 | register unsigned long __schid asm("1") = schid; | |
81 | register unsigned long __mask asm("2") = mask; | |
82 | int cc = QDIO_ERROR_SIGA_ACCESS_EXCEPTION; | |
83 | ||
84 | asm volatile( | |
85 | " siga 0\n" | |
86 | "0: ipm %0\n" | |
87 | " srl %0,28\n" | |
88 | "1:\n" | |
89 | EX_TABLE(0b, 1b) | |
90 | : "+d" (cc), "+d" (__fc), "+d" (__schid), "+d" (__mask) | |
91 | : : "cc", "memory"); | |
92 | *bb = ((unsigned int) __fc) >> 31; | |
93 | return cc; | |
94 | } | |
95 | ||
96 | static inline int qdio_check_ccq(struct qdio_q *q, unsigned int ccq) | |
97 | { | |
779e6e1c JG |
98 | /* all done or next buffer state different */ |
99 | if (ccq == 0 || ccq == 32) | |
100 | return 0; | |
101 | /* not all buffers processed */ | |
102 | if (ccq == 96 || ccq == 97) | |
103 | return 1; | |
104 | /* notify devices immediately */ | |
22f99347 | 105 | DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq); |
779e6e1c JG |
106 | return -EIO; |
107 | } | |
108 | ||
109 | /** | |
110 | * qdio_do_eqbs - extract buffer states for QEBSM | |
111 | * @q: queue to manipulate | |
112 | * @state: state of the extracted buffers | |
113 | * @start: buffer number to start at | |
114 | * @count: count of buffers to examine | |
115 | * | |
116 | * Returns the number of successfull extracted equal buffer states. | |
117 | * Stops processing if a state is different from the last buffers state. | |
118 | */ | |
119 | static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state, | |
120 | int start, int count) | |
121 | { | |
122 | unsigned int ccq = 0; | |
123 | int tmp_count = count, tmp_start = start; | |
124 | int nr = q->nr; | |
125 | int rc; | |
779e6e1c JG |
126 | |
127 | BUG_ON(!q->irq_ptr->sch_token); | |
23589d05 | 128 | qdio_perf_stat_inc(&perf_stats.debug_eqbs_all); |
779e6e1c JG |
129 | |
130 | if (!q->is_input_q) | |
131 | nr += q->irq_ptr->nr_input_qs; | |
132 | again: | |
133 | ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count); | |
134 | rc = qdio_check_ccq(q, ccq); | |
135 | ||
136 | /* At least one buffer was processed, return and extract the remaining | |
137 | * buffers later. | |
138 | */ | |
23589d05 JG |
139 | if ((ccq == 96) && (count != tmp_count)) { |
140 | qdio_perf_stat_inc(&perf_stats.debug_eqbs_incomplete); | |
779e6e1c | 141 | return (count - tmp_count); |
23589d05 | 142 | } |
22f99347 | 143 | |
779e6e1c | 144 | if (rc == 1) { |
22f99347 | 145 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq); |
779e6e1c JG |
146 | goto again; |
147 | } | |
148 | ||
149 | if (rc < 0) { | |
22f99347 JG |
150 | DBF_ERROR("%4x EQBS ERROR", SCH_NO(q)); |
151 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); | |
779e6e1c JG |
152 | q->handler(q->irq_ptr->cdev, |
153 | QDIO_ERROR_ACTIVATE_CHECK_CONDITION, | |
154 | 0, -1, -1, q->irq_ptr->int_parm); | |
155 | return 0; | |
156 | } | |
157 | return count - tmp_count; | |
158 | } | |
159 | ||
160 | /** | |
161 | * qdio_do_sqbs - set buffer states for QEBSM | |
162 | * @q: queue to manipulate | |
163 | * @state: new state of the buffers | |
164 | * @start: first buffer number to change | |
165 | * @count: how many buffers to change | |
166 | * | |
167 | * Returns the number of successfully changed buffers. | |
168 | * Does retrying until the specified count of buffer states is set or an | |
169 | * error occurs. | |
170 | */ | |
171 | static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, | |
172 | int count) | |
173 | { | |
174 | unsigned int ccq = 0; | |
175 | int tmp_count = count, tmp_start = start; | |
176 | int nr = q->nr; | |
177 | int rc; | |
779e6e1c JG |
178 | |
179 | BUG_ON(!q->irq_ptr->sch_token); | |
23589d05 | 180 | qdio_perf_stat_inc(&perf_stats.debug_sqbs_all); |
779e6e1c JG |
181 | |
182 | if (!q->is_input_q) | |
183 | nr += q->irq_ptr->nr_input_qs; | |
184 | again: | |
185 | ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count); | |
186 | rc = qdio_check_ccq(q, ccq); | |
187 | if (rc == 1) { | |
22f99347 | 188 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq); |
23589d05 | 189 | qdio_perf_stat_inc(&perf_stats.debug_sqbs_incomplete); |
779e6e1c JG |
190 | goto again; |
191 | } | |
192 | if (rc < 0) { | |
22f99347 JG |
193 | DBF_ERROR("%4x SQBS ERROR", SCH_NO(q)); |
194 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); | |
779e6e1c JG |
195 | q->handler(q->irq_ptr->cdev, |
196 | QDIO_ERROR_ACTIVATE_CHECK_CONDITION, | |
197 | 0, -1, -1, q->irq_ptr->int_parm); | |
198 | return 0; | |
199 | } | |
200 | WARN_ON(tmp_count); | |
201 | return count - tmp_count; | |
202 | } | |
203 | ||
204 | /* returns number of examined buffers and their common state in *state */ | |
205 | static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr, | |
206 | unsigned char *state, unsigned int count) | |
207 | { | |
208 | unsigned char __state = 0; | |
209 | int i; | |
210 | ||
211 | BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); | |
212 | BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); | |
213 | ||
214 | if (is_qebsm(q)) | |
215 | return qdio_do_eqbs(q, state, bufnr, count); | |
216 | ||
217 | for (i = 0; i < count; i++) { | |
218 | if (!__state) | |
219 | __state = q->slsb.val[bufnr]; | |
220 | else if (q->slsb.val[bufnr] != __state) | |
221 | break; | |
222 | bufnr = next_buf(bufnr); | |
223 | } | |
224 | *state = __state; | |
225 | return i; | |
226 | } | |
227 | ||
228 | inline int get_buf_state(struct qdio_q *q, unsigned int bufnr, | |
229 | unsigned char *state) | |
230 | { | |
231 | return get_buf_states(q, bufnr, state, 1); | |
232 | } | |
233 | ||
234 | /* wrap-around safe setting of slsb states, returns number of changed buffers */ | |
235 | static inline int set_buf_states(struct qdio_q *q, int bufnr, | |
236 | unsigned char state, int count) | |
237 | { | |
238 | int i; | |
239 | ||
240 | BUG_ON(bufnr > QDIO_MAX_BUFFERS_MASK); | |
241 | BUG_ON(count > QDIO_MAX_BUFFERS_PER_Q); | |
242 | ||
243 | if (is_qebsm(q)) | |
244 | return qdio_do_sqbs(q, state, bufnr, count); | |
245 | ||
246 | for (i = 0; i < count; i++) { | |
247 | xchg(&q->slsb.val[bufnr], state); | |
248 | bufnr = next_buf(bufnr); | |
249 | } | |
250 | return count; | |
251 | } | |
252 | ||
253 | static inline int set_buf_state(struct qdio_q *q, int bufnr, | |
254 | unsigned char state) | |
255 | { | |
256 | return set_buf_states(q, bufnr, state, 1); | |
257 | } | |
258 | ||
259 | /* set slsb states to initial state */ | |
260 | void qdio_init_buf_states(struct qdio_irq *irq_ptr) | |
261 | { | |
262 | struct qdio_q *q; | |
263 | int i; | |
264 | ||
265 | for_each_input_queue(irq_ptr, q, i) | |
266 | set_buf_states(q, 0, SLSB_P_INPUT_NOT_INIT, | |
267 | QDIO_MAX_BUFFERS_PER_Q); | |
268 | for_each_output_queue(irq_ptr, q, i) | |
269 | set_buf_states(q, 0, SLSB_P_OUTPUT_NOT_INIT, | |
270 | QDIO_MAX_BUFFERS_PER_Q); | |
271 | } | |
272 | ||
273 | static int qdio_siga_sync(struct qdio_q *q, unsigned int output, | |
274 | unsigned int input) | |
275 | { | |
276 | int cc; | |
277 | ||
278 | if (!need_siga_sync(q)) | |
279 | return 0; | |
280 | ||
22f99347 JG |
281 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:"); |
282 | DBF_DEV_HEX(DBF_INFO, q->irq_ptr, q, sizeof(void *)); | |
779e6e1c JG |
283 | qdio_perf_stat_inc(&perf_stats.siga_sync); |
284 | ||
285 | cc = do_siga_sync(q->irq_ptr->schid, output, input); | |
22f99347 JG |
286 | if (cc) |
287 | DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc); | |
779e6e1c JG |
288 | return cc; |
289 | } | |
290 | ||
291 | inline int qdio_siga_sync_q(struct qdio_q *q) | |
292 | { | |
293 | if (q->is_input_q) | |
294 | return qdio_siga_sync(q, 0, q->mask); | |
295 | else | |
296 | return qdio_siga_sync(q, q->mask, 0); | |
297 | } | |
298 | ||
299 | static inline int qdio_siga_sync_out(struct qdio_q *q) | |
300 | { | |
301 | return qdio_siga_sync(q, ~0U, 0); | |
302 | } | |
303 | ||
304 | static inline int qdio_siga_sync_all(struct qdio_q *q) | |
305 | { | |
306 | return qdio_siga_sync(q, ~0U, ~0U); | |
307 | } | |
308 | ||
309 | static inline int qdio_do_siga_output(struct qdio_q *q, unsigned int *busy_bit) | |
310 | { | |
311 | unsigned int fc = 0; | |
312 | unsigned long schid; | |
313 | ||
7a0f4755 KDW |
314 | if (q->u.out.use_enh_siga) { |
315 | fc = 3; | |
316 | } | |
779e6e1c JG |
317 | if (!is_qebsm(q)) |
318 | schid = *((u32 *)&q->irq_ptr->schid); | |
319 | else { | |
320 | schid = q->irq_ptr->sch_token; | |
321 | fc |= 0x80; | |
322 | } | |
323 | return do_siga_output(schid, q->mask, busy_bit, fc); | |
324 | } | |
325 | ||
326 | static int qdio_siga_output(struct qdio_q *q) | |
327 | { | |
328 | int cc; | |
329 | u32 busy_bit; | |
330 | u64 start_time = 0; | |
779e6e1c | 331 | |
22f99347 | 332 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr); |
779e6e1c JG |
333 | qdio_perf_stat_inc(&perf_stats.siga_out); |
334 | again: | |
335 | cc = qdio_do_siga_output(q, &busy_bit); | |
336 | if (queue_type(q) == QDIO_IQDIO_QFMT && cc == 2 && busy_bit) { | |
22f99347 | 337 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w bb:%2d", q->nr); |
58eb27cd | 338 | |
779e6e1c JG |
339 | if (!start_time) |
340 | start_time = get_usecs(); | |
341 | else if ((get_usecs() - start_time) < QDIO_BUSY_BIT_PATIENCE) | |
342 | goto again; | |
343 | } | |
344 | ||
345 | if (cc == 2 && busy_bit) | |
346 | cc |= QDIO_ERROR_SIGA_BUSY; | |
347 | if (cc) | |
22f99347 | 348 | DBF_ERROR("%4x SIGA-W:%2d", SCH_NO(q), cc); |
779e6e1c JG |
349 | return cc; |
350 | } | |
351 | ||
352 | static inline int qdio_siga_input(struct qdio_q *q) | |
353 | { | |
354 | int cc; | |
355 | ||
22f99347 | 356 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr); |
779e6e1c JG |
357 | qdio_perf_stat_inc(&perf_stats.siga_in); |
358 | ||
359 | cc = do_siga_input(q->irq_ptr->schid, q->mask); | |
360 | if (cc) | |
22f99347 | 361 | DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc); |
779e6e1c JG |
362 | return cc; |
363 | } | |
364 | ||
365 | /* called from thinint inbound handler */ | |
366 | void qdio_sync_after_thinint(struct qdio_q *q) | |
367 | { | |
368 | if (pci_out_supported(q)) { | |
369 | if (need_siga_sync_thinint(q)) | |
370 | qdio_siga_sync_all(q); | |
371 | else if (need_siga_sync_out_thinint(q)) | |
372 | qdio_siga_sync_out(q); | |
373 | } else | |
374 | qdio_siga_sync_q(q); | |
375 | } | |
376 | ||
377 | inline void qdio_stop_polling(struct qdio_q *q) | |
378 | { | |
379 | spin_lock_bh(&q->u.in.lock); | |
380 | if (!q->u.in.polling) { | |
381 | spin_unlock_bh(&q->u.in.lock); | |
382 | return; | |
383 | } | |
384 | q->u.in.polling = 0; | |
385 | qdio_perf_stat_inc(&perf_stats.debug_stop_polling); | |
386 | ||
387 | /* show the card that we are not polling anymore */ | |
388 | set_buf_state(q, q->last_move_ftc, SLSB_P_INPUT_NOT_INIT); | |
389 | spin_unlock_bh(&q->u.in.lock); | |
390 | } | |
391 | ||
392 | static void announce_buffer_error(struct qdio_q *q) | |
393 | { | |
22f99347 JG |
394 | DBF_ERROR("%4x BUF ERROR", SCH_NO(q)); |
395 | DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr); | |
396 | DBF_ERROR("FTC:%3d", q->first_to_check); | |
397 | DBF_ERROR("F14:%2x F15:%2x", | |
398 | q->sbal[q->first_to_check]->element[14].flags & 0xff, | |
399 | q->sbal[q->first_to_check]->element[15].flags & 0xff); | |
779e6e1c JG |
400 | |
401 | q->qdio_error = QDIO_ERROR_SLSB_STATE; | |
402 | } | |
403 | ||
404 | static int get_inbound_buffer_frontier(struct qdio_q *q) | |
405 | { | |
406 | int count, stop; | |
407 | unsigned char state; | |
408 | ||
409 | /* | |
410 | * If we still poll don't update last_move_ftc, keep the | |
411 | * previously ACK buffer there. | |
412 | */ | |
413 | if (!q->u.in.polling) | |
414 | q->last_move_ftc = q->first_to_check; | |
415 | ||
416 | /* | |
417 | * Don't check 128 buffers, as otherwise qdio_inbound_q_moved | |
418 | * would return 0. | |
419 | */ | |
420 | count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); | |
421 | stop = add_buf(q->first_to_check, count); | |
422 | ||
423 | /* | |
424 | * No siga sync here, as a PCI or we after a thin interrupt | |
425 | * will sync the queues. | |
426 | */ | |
427 | ||
428 | /* need to set count to 1 for non-qebsm */ | |
429 | if (!is_qebsm(q)) | |
430 | count = 1; | |
431 | ||
432 | check_next: | |
433 | if (q->first_to_check == stop) | |
434 | goto out; | |
435 | ||
436 | count = get_buf_states(q, q->first_to_check, &state, count); | |
437 | if (!count) | |
438 | goto out; | |
439 | ||
440 | switch (state) { | |
441 | case SLSB_P_INPUT_PRIMED: | |
22f99347 | 442 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim: %3d", count); |
779e6e1c JG |
443 | |
444 | /* | |
445 | * Only ACK the first buffer. The ACK will be removed in | |
446 | * qdio_stop_polling. | |
447 | */ | |
448 | if (q->u.in.polling) | |
449 | state = SLSB_P_INPUT_NOT_INIT; | |
450 | else { | |
451 | q->u.in.polling = 1; | |
452 | state = SLSB_P_INPUT_ACK; | |
453 | } | |
454 | set_buf_state(q, q->first_to_check, state); | |
455 | ||
456 | /* | |
457 | * Need to change all PRIMED buffers to NOT_INIT, otherwise | |
458 | * we're loosing initiative in the thinint code. | |
459 | */ | |
460 | if (count > 1) | |
461 | set_buf_states(q, next_buf(q->first_to_check), | |
462 | SLSB_P_INPUT_NOT_INIT, count - 1); | |
463 | ||
464 | /* | |
465 | * No siga-sync needed for non-qebsm here, as the inbound queue | |
466 | * will be synced on the next siga-r, resp. | |
467 | * tiqdio_is_inbound_q_done will do the siga-sync. | |
468 | */ | |
469 | q->first_to_check = add_buf(q->first_to_check, count); | |
470 | atomic_sub(count, &q->nr_buf_used); | |
471 | goto check_next; | |
472 | case SLSB_P_INPUT_ERROR: | |
473 | announce_buffer_error(q); | |
474 | /* process the buffer, the upper layer will take care of it */ | |
475 | q->first_to_check = add_buf(q->first_to_check, count); | |
476 | atomic_sub(count, &q->nr_buf_used); | |
477 | break; | |
478 | case SLSB_CU_INPUT_EMPTY: | |
479 | case SLSB_P_INPUT_NOT_INIT: | |
480 | case SLSB_P_INPUT_ACK: | |
22f99347 | 481 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop"); |
779e6e1c JG |
482 | break; |
483 | default: | |
484 | BUG(); | |
485 | } | |
486 | out: | |
779e6e1c JG |
487 | return q->first_to_check; |
488 | } | |
489 | ||
490 | int qdio_inbound_q_moved(struct qdio_q *q) | |
491 | { | |
492 | int bufnr; | |
493 | ||
494 | bufnr = get_inbound_buffer_frontier(q); | |
495 | ||
496 | if ((bufnr != q->last_move_ftc) || q->qdio_error) { | |
497 | if (!need_siga_sync(q) && !pci_out_supported(q)) | |
498 | q->u.in.timestamp = get_usecs(); | |
499 | ||
22f99347 | 500 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in moved"); |
779e6e1c JG |
501 | return 1; |
502 | } else | |
503 | return 0; | |
504 | } | |
505 | ||
506 | static int qdio_inbound_q_done(struct qdio_q *q) | |
507 | { | |
9a1ce28a | 508 | unsigned char state = 0; |
779e6e1c JG |
509 | |
510 | if (!atomic_read(&q->nr_buf_used)) | |
511 | return 1; | |
512 | ||
513 | /* | |
514 | * We need that one for synchronization with the adapter, as it | |
515 | * does a kind of PCI avoidance. | |
516 | */ | |
517 | qdio_siga_sync_q(q); | |
518 | ||
519 | get_buf_state(q, q->first_to_check, &state); | |
520 | if (state == SLSB_P_INPUT_PRIMED) | |
521 | /* we got something to do */ | |
522 | return 0; | |
523 | ||
524 | /* on VM, we don't poll, so the q is always done here */ | |
525 | if (need_siga_sync(q) || pci_out_supported(q)) | |
526 | return 1; | |
527 | ||
528 | /* | |
529 | * At this point we know, that inbound first_to_check | |
530 | * has (probably) not moved (see qdio_inbound_processing). | |
531 | */ | |
532 | if (get_usecs() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) { | |
22f99347 JG |
533 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%3d", |
534 | q->first_to_check); | |
779e6e1c JG |
535 | return 1; |
536 | } else { | |
22f99347 JG |
537 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in notd:%3d", |
538 | q->first_to_check); | |
779e6e1c JG |
539 | return 0; |
540 | } | |
541 | } | |
542 | ||
543 | void qdio_kick_inbound_handler(struct qdio_q *q) | |
544 | { | |
545 | int count, start, end; | |
779e6e1c JG |
546 | |
547 | qdio_perf_stat_inc(&perf_stats.inbound_handler); | |
548 | ||
549 | start = q->first_to_kick; | |
550 | end = q->first_to_check; | |
551 | if (end >= start) | |
552 | count = end - start; | |
553 | else | |
554 | count = end + QDIO_MAX_BUFFERS_PER_Q - start; | |
555 | ||
22f99347 | 556 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%3d c:%3d", start, count); |
779e6e1c JG |
557 | |
558 | if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) | |
559 | return; | |
560 | ||
561 | q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, | |
562 | start, count, q->irq_ptr->int_parm); | |
563 | ||
564 | /* for the next time */ | |
565 | q->first_to_kick = q->first_to_check; | |
566 | q->qdio_error = 0; | |
567 | } | |
568 | ||
569 | static void __qdio_inbound_processing(struct qdio_q *q) | |
570 | { | |
571 | qdio_perf_stat_inc(&perf_stats.tasklet_inbound); | |
572 | again: | |
573 | if (!qdio_inbound_q_moved(q)) | |
574 | return; | |
575 | ||
576 | qdio_kick_inbound_handler(q); | |
577 | ||
578 | if (!qdio_inbound_q_done(q)) | |
579 | /* means poll time is not yet over */ | |
580 | goto again; | |
581 | ||
582 | qdio_stop_polling(q); | |
583 | /* | |
584 | * We need to check again to not lose initiative after | |
585 | * resetting the ACK state. | |
586 | */ | |
587 | if (!qdio_inbound_q_done(q)) | |
588 | goto again; | |
589 | } | |
590 | ||
591 | /* inbound tasklet */ | |
592 | void qdio_inbound_processing(unsigned long data) | |
593 | { | |
594 | struct qdio_q *q = (struct qdio_q *)data; | |
595 | __qdio_inbound_processing(q); | |
596 | } | |
597 | ||
598 | static int get_outbound_buffer_frontier(struct qdio_q *q) | |
599 | { | |
600 | int count, stop; | |
601 | unsigned char state; | |
602 | ||
603 | if (((queue_type(q) != QDIO_IQDIO_QFMT) && !pci_out_supported(q)) || | |
604 | (queue_type(q) == QDIO_IQDIO_QFMT && multicast_outbound(q))) | |
605 | qdio_siga_sync_q(q); | |
606 | ||
607 | /* | |
608 | * Don't check 128 buffers, as otherwise qdio_inbound_q_moved | |
609 | * would return 0. | |
610 | */ | |
611 | count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); | |
612 | stop = add_buf(q->first_to_check, count); | |
613 | ||
614 | /* need to set count to 1 for non-qebsm */ | |
615 | if (!is_qebsm(q)) | |
616 | count = 1; | |
617 | ||
618 | check_next: | |
619 | if (q->first_to_check == stop) | |
620 | return q->first_to_check; | |
621 | ||
622 | count = get_buf_states(q, q->first_to_check, &state, count); | |
623 | if (!count) | |
624 | return q->first_to_check; | |
625 | ||
626 | switch (state) { | |
627 | case SLSB_P_OUTPUT_EMPTY: | |
628 | /* the adapter got it */ | |
22f99347 | 629 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out empty:%1d %3d", q->nr, count); |
779e6e1c JG |
630 | |
631 | atomic_sub(count, &q->nr_buf_used); | |
632 | q->first_to_check = add_buf(q->first_to_check, count); | |
633 | /* | |
634 | * We fetch all buffer states at once. get_buf_states may | |
635 | * return count < stop. For QEBSM we do not loop. | |
636 | */ | |
637 | if (is_qebsm(q)) | |
638 | break; | |
639 | goto check_next; | |
640 | case SLSB_P_OUTPUT_ERROR: | |
641 | announce_buffer_error(q); | |
642 | /* process the buffer, the upper layer will take care of it */ | |
643 | q->first_to_check = add_buf(q->first_to_check, count); | |
644 | atomic_sub(count, &q->nr_buf_used); | |
645 | break; | |
646 | case SLSB_CU_OUTPUT_PRIMED: | |
647 | /* the adapter has not fetched the output yet */ | |
22f99347 | 648 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d", q->nr); |
779e6e1c JG |
649 | break; |
650 | case SLSB_P_OUTPUT_NOT_INIT: | |
651 | case SLSB_P_OUTPUT_HALTED: | |
652 | break; | |
653 | default: | |
654 | BUG(); | |
655 | } | |
656 | return q->first_to_check; | |
657 | } | |
658 | ||
659 | /* all buffers processed? */ | |
660 | static inline int qdio_outbound_q_done(struct qdio_q *q) | |
661 | { | |
662 | return atomic_read(&q->nr_buf_used) == 0; | |
663 | } | |
664 | ||
665 | static inline int qdio_outbound_q_moved(struct qdio_q *q) | |
666 | { | |
667 | int bufnr; | |
668 | ||
669 | bufnr = get_outbound_buffer_frontier(q); | |
670 | ||
671 | if ((bufnr != q->last_move_ftc) || q->qdio_error) { | |
672 | q->last_move_ftc = bufnr; | |
22f99347 | 673 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr); |
779e6e1c JG |
674 | return 1; |
675 | } else | |
676 | return 0; | |
677 | } | |
678 | ||
679 | /* | |
680 | * VM could present us cc=2 and busy bit set on SIGA-write | |
681 | * during reconfiguration of their Guest LAN (only in iqdio mode, | |
682 | * otherwise qdio is asynchronous and cc=2 and busy bit there will take | |
683 | * the queues down immediately). | |
684 | * | |
685 | * Therefore qdio_siga_output will try for a short time constantly, | |
686 | * if such a condition occurs. If it doesn't change, it will | |
687 | * increase the busy_siga_counter and save the timestamp, and | |
688 | * schedule the queue for later processing. qdio_outbound_processing | |
689 | * will check out the counter. If non-zero, it will call qdio_kick_outbound_q | |
690 | * as often as the value of the counter. This will attempt further SIGA | |
691 | * instructions. For each successful SIGA, the counter is | |
692 | * decreased, for failing SIGAs the counter remains the same, after | |
693 | * all. After some time of no movement, qdio_kick_outbound_q will | |
694 | * finally fail and reflect corresponding error codes to call | |
695 | * the upper layer module and have it take the queues down. | |
696 | * | |
697 | * Note that this is a change from the original HiperSockets design | |
698 | * (saying cc=2 and busy bit means take the queues down), but in | |
699 | * these days Guest LAN didn't exist... excessive cc=2 with busy bit | |
700 | * conditions will still take the queues down, but the threshold is | |
701 | * higher due to the Guest LAN environment. | |
702 | * | |
703 | * Called from outbound tasklet and do_QDIO handler. | |
704 | */ | |
705 | static void qdio_kick_outbound_q(struct qdio_q *q) | |
706 | { | |
707 | int rc; | |
779e6e1c | 708 | |
22f99347 | 709 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kickoutq:%1d", q->nr); |
779e6e1c JG |
710 | |
711 | if (!need_siga_out(q)) | |
712 | return; | |
713 | ||
714 | rc = qdio_siga_output(q); | |
715 | switch (rc) { | |
716 | case 0: | |
779e6e1c | 717 | /* TODO: improve error handling for CC=0 case */ |
22f99347 JG |
718 | if (q->u.out.timestamp) |
719 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "cc2 rslv:%4x", | |
720 | atomic_read(&q->u.out.busy_siga_counter)); | |
58eb27cd JG |
721 | /* went smooth this time, reset timestamp */ |
722 | q->u.out.timestamp = 0; | |
779e6e1c JG |
723 | break; |
724 | /* cc=2 and busy bit */ | |
725 | case (2 | QDIO_ERROR_SIGA_BUSY): | |
726 | atomic_inc(&q->u.out.busy_siga_counter); | |
727 | ||
728 | /* if the last siga was successful, save timestamp here */ | |
729 | if (!q->u.out.timestamp) | |
730 | q->u.out.timestamp = get_usecs(); | |
731 | ||
732 | /* if we're in time, don't touch qdio_error */ | |
733 | if (get_usecs() - q->u.out.timestamp < QDIO_BUSY_BIT_GIVE_UP) { | |
734 | tasklet_schedule(&q->tasklet); | |
735 | break; | |
736 | } | |
22f99347 | 737 | DBF_ERROR("%4x cc2 REP:%1d", SCH_NO(q), q->nr); |
779e6e1c JG |
738 | default: |
739 | /* for plain cc=1, 2 or 3 */ | |
740 | q->qdio_error = rc; | |
741 | } | |
742 | } | |
743 | ||
744 | static void qdio_kick_outbound_handler(struct qdio_q *q) | |
745 | { | |
746 | int start, end, count; | |
779e6e1c JG |
747 | |
748 | start = q->first_to_kick; | |
749 | end = q->last_move_ftc; | |
750 | if (end >= start) | |
751 | count = end - start; | |
752 | else | |
753 | count = end + QDIO_MAX_BUFFERS_PER_Q - start; | |
754 | ||
22f99347 JG |
755 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kickouth: %1d", q->nr); |
756 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "s:%3d c:%3d", start, count); | |
779e6e1c JG |
757 | |
758 | if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) | |
759 | return; | |
760 | ||
761 | q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count, | |
762 | q->irq_ptr->int_parm); | |
763 | ||
764 | /* for the next time: */ | |
765 | q->first_to_kick = q->last_move_ftc; | |
766 | q->qdio_error = 0; | |
767 | } | |
768 | ||
769 | static void __qdio_outbound_processing(struct qdio_q *q) | |
770 | { | |
771 | int siga_attempts; | |
772 | ||
773 | qdio_perf_stat_inc(&perf_stats.tasklet_outbound); | |
774 | ||
775 | /* see comment in qdio_kick_outbound_q */ | |
776 | siga_attempts = atomic_read(&q->u.out.busy_siga_counter); | |
777 | while (siga_attempts--) { | |
778 | atomic_dec(&q->u.out.busy_siga_counter); | |
779 | qdio_kick_outbound_q(q); | |
780 | } | |
781 | ||
782 | BUG_ON(atomic_read(&q->nr_buf_used) < 0); | |
783 | ||
784 | if (qdio_outbound_q_moved(q)) | |
785 | qdio_kick_outbound_handler(q); | |
786 | ||
787 | if (queue_type(q) == QDIO_ZFCP_QFMT) { | |
788 | if (!pci_out_supported(q) && !qdio_outbound_q_done(q)) | |
789 | tasklet_schedule(&q->tasklet); | |
790 | return; | |
791 | } | |
792 | ||
793 | /* bail out for HiperSockets unicast queues */ | |
794 | if (queue_type(q) == QDIO_IQDIO_QFMT && !multicast_outbound(q)) | |
795 | return; | |
796 | ||
4bcb3a37 UB |
797 | if ((queue_type(q) == QDIO_IQDIO_QFMT) && |
798 | (atomic_read(&q->nr_buf_used)) > QDIO_IQDIO_POLL_LVL) { | |
799 | tasklet_schedule(&q->tasklet); | |
800 | return; | |
801 | } | |
802 | ||
779e6e1c JG |
803 | if (q->u.out.pci_out_enabled) |
804 | return; | |
805 | ||
806 | /* | |
807 | * Now we know that queue type is either qeth without pci enabled | |
808 | * or HiperSockets multicast. Make sure buffer switch from PRIMED to | |
809 | * EMPTY is noticed and outbound_handler is called after some time. | |
810 | */ | |
811 | if (qdio_outbound_q_done(q)) | |
812 | del_timer(&q->u.out.timer); | |
813 | else { | |
814 | if (!timer_pending(&q->u.out.timer)) { | |
815 | mod_timer(&q->u.out.timer, jiffies + 10 * HZ); | |
816 | qdio_perf_stat_inc(&perf_stats.debug_tl_out_timer); | |
817 | } | |
818 | } | |
819 | } | |
820 | ||
821 | /* outbound tasklet */ | |
822 | void qdio_outbound_processing(unsigned long data) | |
823 | { | |
824 | struct qdio_q *q = (struct qdio_q *)data; | |
825 | __qdio_outbound_processing(q); | |
826 | } | |
827 | ||
828 | void qdio_outbound_timer(unsigned long data) | |
829 | { | |
830 | struct qdio_q *q = (struct qdio_q *)data; | |
831 | tasklet_schedule(&q->tasklet); | |
832 | } | |
833 | ||
834 | /* called from thinint inbound tasklet */ | |
835 | void qdio_check_outbound_after_thinint(struct qdio_q *q) | |
836 | { | |
837 | struct qdio_q *out; | |
838 | int i; | |
839 | ||
840 | if (!pci_out_supported(q)) | |
841 | return; | |
842 | ||
843 | for_each_output_queue(q->irq_ptr, out, i) | |
844 | if (!qdio_outbound_q_done(out)) | |
845 | tasklet_schedule(&out->tasklet); | |
846 | } | |
847 | ||
848 | static inline void qdio_set_state(struct qdio_irq *irq_ptr, | |
849 | enum qdio_irq_states state) | |
850 | { | |
22f99347 | 851 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "newstate: %1d", state); |
779e6e1c JG |
852 | |
853 | irq_ptr->state = state; | |
854 | mb(); | |
855 | } | |
856 | ||
22f99347 | 857 | static void qdio_irq_check_sense(struct qdio_irq *irq_ptr, struct irb *irb) |
779e6e1c | 858 | { |
779e6e1c | 859 | if (irb->esw.esw0.erw.cons) { |
22f99347 JG |
860 | DBF_ERROR("%4x sense:", irq_ptr->schid.sch_no); |
861 | DBF_ERROR_HEX(irb, 64); | |
862 | DBF_ERROR_HEX(irb->ecw, 64); | |
779e6e1c JG |
863 | } |
864 | } | |
865 | ||
866 | /* PCI interrupt handler */ | |
867 | static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) | |
868 | { | |
869 | int i; | |
870 | struct qdio_q *q; | |
871 | ||
872 | qdio_perf_stat_inc(&perf_stats.pci_int); | |
873 | ||
874 | for_each_input_queue(irq_ptr, q, i) | |
875 | tasklet_schedule(&q->tasklet); | |
876 | ||
877 | if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)) | |
878 | return; | |
879 | ||
880 | for_each_output_queue(irq_ptr, q, i) { | |
881 | if (qdio_outbound_q_done(q)) | |
882 | continue; | |
883 | ||
884 | if (!siga_syncs_out_pci(q)) | |
885 | qdio_siga_sync_q(q); | |
886 | ||
887 | tasklet_schedule(&q->tasklet); | |
888 | } | |
889 | } | |
890 | ||
891 | static void qdio_handle_activate_check(struct ccw_device *cdev, | |
892 | unsigned long intparm, int cstat, int dstat) | |
893 | { | |
894 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
895 | struct qdio_q *q; | |
779e6e1c | 896 | |
22f99347 JG |
897 | DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no); |
898 | DBF_ERROR("intp :%lx", intparm); | |
899 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); | |
779e6e1c JG |
900 | |
901 | if (irq_ptr->nr_input_qs) { | |
902 | q = irq_ptr->input_qs[0]; | |
903 | } else if (irq_ptr->nr_output_qs) { | |
904 | q = irq_ptr->output_qs[0]; | |
905 | } else { | |
906 | dump_stack(); | |
907 | goto no_handler; | |
908 | } | |
909 | q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE_CHECK_CONDITION, | |
910 | 0, -1, -1, irq_ptr->int_parm); | |
911 | no_handler: | |
912 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); | |
913 | } | |
914 | ||
915 | static void qdio_call_shutdown(struct work_struct *work) | |
916 | { | |
917 | struct ccw_device_private *priv; | |
918 | struct ccw_device *cdev; | |
919 | ||
920 | priv = container_of(work, struct ccw_device_private, kick_work); | |
921 | cdev = priv->cdev; | |
922 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
923 | put_device(&cdev->dev); | |
924 | } | |
925 | ||
926 | static void qdio_int_error(struct ccw_device *cdev) | |
927 | { | |
928 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
929 | ||
930 | switch (irq_ptr->state) { | |
931 | case QDIO_IRQ_STATE_INACTIVE: | |
932 | case QDIO_IRQ_STATE_CLEANUP: | |
933 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
934 | break; | |
935 | case QDIO_IRQ_STATE_ESTABLISHED: | |
936 | case QDIO_IRQ_STATE_ACTIVE: | |
937 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); | |
938 | if (get_device(&cdev->dev)) { | |
939 | /* Can't call shutdown from interrupt context. */ | |
940 | PREPARE_WORK(&cdev->private->kick_work, | |
941 | qdio_call_shutdown); | |
942 | queue_work(ccw_device_work, &cdev->private->kick_work); | |
943 | } | |
944 | break; | |
945 | default: | |
946 | WARN_ON(1); | |
947 | } | |
948 | wake_up(&cdev->private->wait_q); | |
949 | } | |
950 | ||
951 | static int qdio_establish_check_errors(struct ccw_device *cdev, int cstat, | |
22f99347 | 952 | int dstat) |
779e6e1c JG |
953 | { |
954 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
955 | ||
956 | if (cstat || (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END))) { | |
22f99347 | 957 | DBF_ERROR("EQ:ck con"); |
779e6e1c JG |
958 | goto error; |
959 | } | |
960 | ||
961 | if (!(dstat & DEV_STAT_DEV_END)) { | |
22f99347 | 962 | DBF_ERROR("EQ:no dev"); |
779e6e1c JG |
963 | goto error; |
964 | } | |
965 | ||
966 | if (dstat & ~(DEV_STAT_CHN_END | DEV_STAT_DEV_END)) { | |
22f99347 | 967 | DBF_ERROR("EQ: bad io"); |
779e6e1c JG |
968 | goto error; |
969 | } | |
970 | return 0; | |
971 | error: | |
22f99347 JG |
972 | DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no); |
973 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); | |
974 | ||
779e6e1c JG |
975 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); |
976 | return 1; | |
977 | } | |
978 | ||
979 | static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, | |
980 | int dstat) | |
981 | { | |
982 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
779e6e1c | 983 | |
22f99347 | 984 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq"); |
779e6e1c JG |
985 | if (!qdio_establish_check_errors(cdev, cstat, dstat)) |
986 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED); | |
987 | } | |
988 | ||
989 | /* qdio interrupt handler */ | |
990 | void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm, | |
991 | struct irb *irb) | |
992 | { | |
993 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
994 | int cstat, dstat; | |
779e6e1c JG |
995 | |
996 | qdio_perf_stat_inc(&perf_stats.qdio_int); | |
997 | ||
998 | if (!intparm || !irq_ptr) { | |
22f99347 | 999 | DBF_ERROR("qint:%4x", cdev->private->schid.sch_no); |
779e6e1c JG |
1000 | return; |
1001 | } | |
1002 | ||
1003 | if (IS_ERR(irb)) { | |
1004 | switch (PTR_ERR(irb)) { | |
1005 | case -EIO: | |
22f99347 | 1006 | DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no); |
779e6e1c JG |
1007 | return; |
1008 | case -ETIMEDOUT: | |
22f99347 | 1009 | DBF_ERROR("%4x IO timeout", irq_ptr->schid.sch_no); |
779e6e1c JG |
1010 | qdio_int_error(cdev); |
1011 | return; | |
1012 | default: | |
1013 | WARN_ON(1); | |
1014 | return; | |
1015 | } | |
1016 | } | |
22f99347 | 1017 | qdio_irq_check_sense(irq_ptr, irb); |
779e6e1c JG |
1018 | |
1019 | cstat = irb->scsw.cmd.cstat; | |
1020 | dstat = irb->scsw.cmd.dstat; | |
1021 | ||
1022 | switch (irq_ptr->state) { | |
1023 | case QDIO_IRQ_STATE_INACTIVE: | |
1024 | qdio_establish_handle_irq(cdev, cstat, dstat); | |
1025 | break; | |
1026 | ||
1027 | case QDIO_IRQ_STATE_CLEANUP: | |
1028 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1029 | break; | |
1030 | ||
1031 | case QDIO_IRQ_STATE_ESTABLISHED: | |
1032 | case QDIO_IRQ_STATE_ACTIVE: | |
1033 | if (cstat & SCHN_STAT_PCI) { | |
1034 | qdio_int_handler_pci(irq_ptr); | |
1035 | /* no state change so no need to wake up wait_q */ | |
1036 | return; | |
1037 | } | |
1038 | if ((cstat & ~SCHN_STAT_PCI) || dstat) { | |
1039 | qdio_handle_activate_check(cdev, intparm, cstat, | |
1040 | dstat); | |
1041 | break; | |
1042 | } | |
1043 | default: | |
1044 | WARN_ON(1); | |
1045 | } | |
1046 | wake_up(&cdev->private->wait_q); | |
1047 | } | |
1048 | ||
1049 | /** | |
1050 | * qdio_get_ssqd_desc - get qdio subchannel description | |
1051 | * @cdev: ccw device to get description for | |
bbd50e17 | 1052 | * @data: where to store the ssqd |
779e6e1c | 1053 | * |
bbd50e17 JG |
1054 | * Returns 0 or an error code. The results of the chsc are stored in the |
1055 | * specified structure. | |
779e6e1c | 1056 | */ |
bbd50e17 JG |
1057 | int qdio_get_ssqd_desc(struct ccw_device *cdev, |
1058 | struct qdio_ssqd_desc *data) | |
779e6e1c | 1059 | { |
779e6e1c | 1060 | |
bbd50e17 JG |
1061 | if (!cdev || !cdev->private) |
1062 | return -EINVAL; | |
1063 | ||
22f99347 | 1064 | DBF_EVENT("get ssqd:%4x", cdev->private->schid.sch_no); |
bbd50e17 | 1065 | return qdio_setup_get_ssqd(NULL, &cdev->private->schid, data); |
779e6e1c JG |
1066 | } |
1067 | EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc); | |
1068 | ||
1069 | /** | |
1070 | * qdio_cleanup - shutdown queues and free data structures | |
1071 | * @cdev: associated ccw device | |
1072 | * @how: use halt or clear to shutdown | |
1073 | * | |
1074 | * This function calls qdio_shutdown() for @cdev with method @how | |
1075 | * and on success qdio_free() for @cdev. | |
1076 | */ | |
1077 | int qdio_cleanup(struct ccw_device *cdev, int how) | |
1078 | { | |
22f99347 | 1079 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
779e6e1c JG |
1080 | int rc; |
1081 | ||
779e6e1c JG |
1082 | if (!irq_ptr) |
1083 | return -ENODEV; | |
1084 | ||
779e6e1c JG |
1085 | rc = qdio_shutdown(cdev, how); |
1086 | if (rc == 0) | |
1087 | rc = qdio_free(cdev); | |
1088 | return rc; | |
1089 | } | |
1090 | EXPORT_SYMBOL_GPL(qdio_cleanup); | |
1091 | ||
1092 | static void qdio_shutdown_queues(struct ccw_device *cdev) | |
1093 | { | |
1094 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
1095 | struct qdio_q *q; | |
1096 | int i; | |
1097 | ||
1098 | for_each_input_queue(irq_ptr, q, i) | |
1099 | tasklet_disable(&q->tasklet); | |
1100 | ||
1101 | for_each_output_queue(irq_ptr, q, i) { | |
1102 | tasklet_disable(&q->tasklet); | |
1103 | del_timer(&q->u.out.timer); | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * qdio_shutdown - shut down a qdio subchannel | |
1109 | * @cdev: associated ccw device | |
1110 | * @how: use halt or clear to shutdown | |
1111 | */ | |
1112 | int qdio_shutdown(struct ccw_device *cdev, int how) | |
1113 | { | |
22f99347 | 1114 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
779e6e1c JG |
1115 | int rc; |
1116 | unsigned long flags; | |
779e6e1c | 1117 | |
779e6e1c JG |
1118 | if (!irq_ptr) |
1119 | return -ENODEV; | |
1120 | ||
22f99347 JG |
1121 | DBF_EVENT("qshutdown:%4x", cdev->private->schid.sch_no); |
1122 | ||
779e6e1c JG |
1123 | mutex_lock(&irq_ptr->setup_mutex); |
1124 | /* | |
1125 | * Subchannel was already shot down. We cannot prevent being called | |
1126 | * twice since cio may trigger a shutdown asynchronously. | |
1127 | */ | |
1128 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { | |
1129 | mutex_unlock(&irq_ptr->setup_mutex); | |
1130 | return 0; | |
1131 | } | |
1132 | ||
779e6e1c JG |
1133 | tiqdio_remove_input_queues(irq_ptr); |
1134 | qdio_shutdown_queues(cdev); | |
1135 | qdio_shutdown_debug_entries(irq_ptr, cdev); | |
1136 | ||
1137 | /* cleanup subchannel */ | |
1138 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1139 | ||
1140 | if (how & QDIO_FLAG_CLEANUP_USING_CLEAR) | |
1141 | rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP); | |
1142 | else | |
1143 | /* default behaviour is halt */ | |
1144 | rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP); | |
1145 | if (rc) { | |
22f99347 JG |
1146 | DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no); |
1147 | DBF_ERROR("rc:%4d", rc); | |
779e6e1c JG |
1148 | goto no_cleanup; |
1149 | } | |
1150 | ||
1151 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP); | |
1152 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1153 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
1154 | irq_ptr->state == QDIO_IRQ_STATE_INACTIVE || | |
1155 | irq_ptr->state == QDIO_IRQ_STATE_ERR, | |
1156 | 10 * HZ); | |
1157 | spin_lock_irqsave(get_ccwdev_lock(cdev), flags); | |
1158 | ||
1159 | no_cleanup: | |
1160 | qdio_shutdown_thinint(irq_ptr); | |
1161 | ||
1162 | /* restore interrupt handler */ | |
1163 | if ((void *)cdev->handler == (void *)qdio_int_handler) | |
1164 | cdev->handler = irq_ptr->orig_handler; | |
1165 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags); | |
1166 | ||
1167 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1168 | mutex_unlock(&irq_ptr->setup_mutex); | |
779e6e1c JG |
1169 | if (rc) |
1170 | return rc; | |
1171 | return 0; | |
1172 | } | |
1173 | EXPORT_SYMBOL_GPL(qdio_shutdown); | |
1174 | ||
1175 | /** | |
1176 | * qdio_free - free data structures for a qdio subchannel | |
1177 | * @cdev: associated ccw device | |
1178 | */ | |
1179 | int qdio_free(struct ccw_device *cdev) | |
1180 | { | |
22f99347 | 1181 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
58eb27cd | 1182 | |
779e6e1c JG |
1183 | if (!irq_ptr) |
1184 | return -ENODEV; | |
1185 | ||
22f99347 | 1186 | DBF_EVENT("qfree:%4x", cdev->private->schid.sch_no); |
779e6e1c | 1187 | mutex_lock(&irq_ptr->setup_mutex); |
22f99347 JG |
1188 | |
1189 | if (irq_ptr->debug_area != NULL) { | |
1190 | debug_unregister(irq_ptr->debug_area); | |
1191 | irq_ptr->debug_area = NULL; | |
1192 | } | |
779e6e1c JG |
1193 | cdev->private->qdio_data = NULL; |
1194 | mutex_unlock(&irq_ptr->setup_mutex); | |
1195 | ||
1196 | qdio_release_memory(irq_ptr); | |
1197 | return 0; | |
1198 | } | |
1199 | EXPORT_SYMBOL_GPL(qdio_free); | |
1200 | ||
1201 | /** | |
1202 | * qdio_initialize - allocate and establish queues for a qdio subchannel | |
1203 | * @init_data: initialization data | |
1204 | * | |
1205 | * This function first allocates queues via qdio_allocate() and on success | |
1206 | * establishes them via qdio_establish(). | |
1207 | */ | |
1208 | int qdio_initialize(struct qdio_initialize *init_data) | |
1209 | { | |
1210 | int rc; | |
779e6e1c JG |
1211 | |
1212 | rc = qdio_allocate(init_data); | |
1213 | if (rc) | |
1214 | return rc; | |
1215 | ||
1216 | rc = qdio_establish(init_data); | |
1217 | if (rc) | |
1218 | qdio_free(init_data->cdev); | |
1219 | return rc; | |
1220 | } | |
1221 | EXPORT_SYMBOL_GPL(qdio_initialize); | |
1222 | ||
1223 | /** | |
1224 | * qdio_allocate - allocate qdio queues and associated data | |
1225 | * @init_data: initialization data | |
1226 | */ | |
1227 | int qdio_allocate(struct qdio_initialize *init_data) | |
1228 | { | |
1229 | struct qdio_irq *irq_ptr; | |
779e6e1c | 1230 | |
22f99347 | 1231 | DBF_EVENT("qallocate:%4x", init_data->cdev->private->schid.sch_no); |
779e6e1c JG |
1232 | |
1233 | if ((init_data->no_input_qs && !init_data->input_handler) || | |
1234 | (init_data->no_output_qs && !init_data->output_handler)) | |
1235 | return -EINVAL; | |
1236 | ||
1237 | if ((init_data->no_input_qs > QDIO_MAX_QUEUES_PER_IRQ) || | |
1238 | (init_data->no_output_qs > QDIO_MAX_QUEUES_PER_IRQ)) | |
1239 | return -EINVAL; | |
1240 | ||
1241 | if ((!init_data->input_sbal_addr_array) || | |
1242 | (!init_data->output_sbal_addr_array)) | |
1243 | return -EINVAL; | |
1244 | ||
779e6e1c JG |
1245 | /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */ |
1246 | irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1247 | if (!irq_ptr) | |
1248 | goto out_err; | |
779e6e1c JG |
1249 | |
1250 | mutex_init(&irq_ptr->setup_mutex); | |
22f99347 | 1251 | qdio_allocate_dbf(init_data, irq_ptr); |
779e6e1c JG |
1252 | |
1253 | /* | |
1254 | * Allocate a page for the chsc calls in qdio_establish. | |
1255 | * Must be pre-allocated since a zfcp recovery will call | |
1256 | * qdio_establish. In case of low memory and swap on a zfcp disk | |
1257 | * we may not be able to allocate memory otherwise. | |
1258 | */ | |
1259 | irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL); | |
1260 | if (!irq_ptr->chsc_page) | |
1261 | goto out_rel; | |
1262 | ||
1263 | /* qdr is used in ccw1.cda which is u32 */ | |
3b8e3004 | 1264 | irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
779e6e1c JG |
1265 | if (!irq_ptr->qdr) |
1266 | goto out_rel; | |
1267 | WARN_ON((unsigned long)irq_ptr->qdr & 0xfff); | |
1268 | ||
779e6e1c JG |
1269 | if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs, |
1270 | init_data->no_output_qs)) | |
1271 | goto out_rel; | |
1272 | ||
1273 | init_data->cdev->private->qdio_data = irq_ptr; | |
1274 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1275 | return 0; | |
1276 | out_rel: | |
1277 | qdio_release_memory(irq_ptr); | |
1278 | out_err: | |
1279 | return -ENOMEM; | |
1280 | } | |
1281 | EXPORT_SYMBOL_GPL(qdio_allocate); | |
1282 | ||
1283 | /** | |
1284 | * qdio_establish - establish queues on a qdio subchannel | |
1285 | * @init_data: initialization data | |
1286 | */ | |
1287 | int qdio_establish(struct qdio_initialize *init_data) | |
1288 | { | |
779e6e1c JG |
1289 | struct qdio_irq *irq_ptr; |
1290 | struct ccw_device *cdev = init_data->cdev; | |
1291 | unsigned long saveflags; | |
1292 | int rc; | |
1293 | ||
22f99347 | 1294 | DBF_EVENT("qestablish:%4x", cdev->private->schid.sch_no); |
58eb27cd | 1295 | |
779e6e1c JG |
1296 | irq_ptr = cdev->private->qdio_data; |
1297 | if (!irq_ptr) | |
1298 | return -ENODEV; | |
1299 | ||
1300 | if (cdev->private->state != DEV_STATE_ONLINE) | |
1301 | return -EINVAL; | |
1302 | ||
779e6e1c JG |
1303 | mutex_lock(&irq_ptr->setup_mutex); |
1304 | qdio_setup_irq(init_data); | |
1305 | ||
1306 | rc = qdio_establish_thinint(irq_ptr); | |
1307 | if (rc) { | |
1308 | mutex_unlock(&irq_ptr->setup_mutex); | |
1309 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1310 | return rc; | |
1311 | } | |
1312 | ||
1313 | /* establish q */ | |
1314 | irq_ptr->ccw.cmd_code = irq_ptr->equeue.cmd; | |
1315 | irq_ptr->ccw.flags = CCW_FLAG_SLI; | |
1316 | irq_ptr->ccw.count = irq_ptr->equeue.count; | |
1317 | irq_ptr->ccw.cda = (u32)((addr_t)irq_ptr->qdr); | |
1318 | ||
1319 | spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags); | |
1320 | ccw_device_set_options_mask(cdev, 0); | |
1321 | ||
1322 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0); | |
1323 | if (rc) { | |
22f99347 JG |
1324 | DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no); |
1325 | DBF_ERROR("rc:%4x", rc); | |
779e6e1c JG |
1326 | } |
1327 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags); | |
1328 | ||
1329 | if (rc) { | |
1330 | mutex_unlock(&irq_ptr->setup_mutex); | |
1331 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1332 | return rc; | |
1333 | } | |
1334 | ||
1335 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
1336 | irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED || | |
1337 | irq_ptr->state == QDIO_IRQ_STATE_ERR, HZ); | |
1338 | ||
1339 | if (irq_ptr->state != QDIO_IRQ_STATE_ESTABLISHED) { | |
1340 | mutex_unlock(&irq_ptr->setup_mutex); | |
1341 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1342 | return -EIO; | |
1343 | } | |
1344 | ||
1345 | qdio_setup_ssqd_info(irq_ptr); | |
22f99347 JG |
1346 | DBF_EVENT("qDmmwc:%2x", irq_ptr->ssqd_desc.mmwc); |
1347 | DBF_EVENT("qib ac:%4x", irq_ptr->qib.ac); | |
779e6e1c JG |
1348 | |
1349 | /* qebsm is now setup if available, initialize buffer states */ | |
1350 | qdio_init_buf_states(irq_ptr); | |
1351 | ||
1352 | mutex_unlock(&irq_ptr->setup_mutex); | |
1353 | qdio_print_subchannel_info(irq_ptr, cdev); | |
1354 | qdio_setup_debug_entries(irq_ptr, cdev); | |
1355 | return 0; | |
1356 | } | |
1357 | EXPORT_SYMBOL_GPL(qdio_establish); | |
1358 | ||
1359 | /** | |
1360 | * qdio_activate - activate queues on a qdio subchannel | |
1361 | * @cdev: associated cdev | |
1362 | */ | |
1363 | int qdio_activate(struct ccw_device *cdev) | |
1364 | { | |
1365 | struct qdio_irq *irq_ptr; | |
1366 | int rc; | |
1367 | unsigned long saveflags; | |
779e6e1c | 1368 | |
22f99347 | 1369 | DBF_EVENT("qactivate:%4x", cdev->private->schid.sch_no); |
58eb27cd | 1370 | |
779e6e1c JG |
1371 | irq_ptr = cdev->private->qdio_data; |
1372 | if (!irq_ptr) | |
1373 | return -ENODEV; | |
1374 | ||
1375 | if (cdev->private->state != DEV_STATE_ONLINE) | |
1376 | return -EINVAL; | |
1377 | ||
1378 | mutex_lock(&irq_ptr->setup_mutex); | |
1379 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { | |
1380 | rc = -EBUSY; | |
1381 | goto out; | |
1382 | } | |
1383 | ||
779e6e1c JG |
1384 | irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd; |
1385 | irq_ptr->ccw.flags = CCW_FLAG_SLI; | |
1386 | irq_ptr->ccw.count = irq_ptr->aqueue.count; | |
1387 | irq_ptr->ccw.cda = 0; | |
1388 | ||
1389 | spin_lock_irqsave(get_ccwdev_lock(cdev), saveflags); | |
1390 | ccw_device_set_options(cdev, CCWDEV_REPORT_ALL); | |
1391 | ||
1392 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE, | |
1393 | 0, DOIO_DENY_PREFETCH); | |
1394 | if (rc) { | |
22f99347 JG |
1395 | DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no); |
1396 | DBF_ERROR("rc:%4x", rc); | |
779e6e1c JG |
1397 | } |
1398 | spin_unlock_irqrestore(get_ccwdev_lock(cdev), saveflags); | |
1399 | ||
1400 | if (rc) | |
1401 | goto out; | |
1402 | ||
1403 | if (is_thinint_irq(irq_ptr)) | |
1404 | tiqdio_add_input_queues(irq_ptr); | |
1405 | ||
1406 | /* wait for subchannel to become active */ | |
1407 | msleep(5); | |
1408 | ||
1409 | switch (irq_ptr->state) { | |
1410 | case QDIO_IRQ_STATE_STOPPED: | |
1411 | case QDIO_IRQ_STATE_ERR: | |
1412 | mutex_unlock(&irq_ptr->setup_mutex); | |
1413 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1414 | return -EIO; | |
1415 | default: | |
1416 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE); | |
1417 | rc = 0; | |
1418 | } | |
1419 | out: | |
1420 | mutex_unlock(&irq_ptr->setup_mutex); | |
1421 | return rc; | |
1422 | } | |
1423 | EXPORT_SYMBOL_GPL(qdio_activate); | |
1424 | ||
1425 | static inline int buf_in_between(int bufnr, int start, int count) | |
1426 | { | |
1427 | int end = add_buf(start, count); | |
1428 | ||
1429 | if (end > start) { | |
1430 | if (bufnr >= start && bufnr < end) | |
1431 | return 1; | |
1432 | else | |
1433 | return 0; | |
1434 | } | |
1435 | ||
1436 | /* wrap-around case */ | |
1437 | if ((bufnr >= start && bufnr <= QDIO_MAX_BUFFERS_PER_Q) || | |
1438 | (bufnr < end)) | |
1439 | return 1; | |
1440 | else | |
1441 | return 0; | |
1442 | } | |
1443 | ||
1444 | /** | |
1445 | * handle_inbound - reset processed input buffers | |
1446 | * @q: queue containing the buffers | |
1447 | * @callflags: flags | |
1448 | * @bufnr: first buffer to process | |
1449 | * @count: how many buffers are emptied | |
1450 | */ | |
1451 | static void handle_inbound(struct qdio_q *q, unsigned int callflags, | |
1452 | int bufnr, int count) | |
1453 | { | |
1454 | unsigned long flags; | |
1455 | int used, rc; | |
1456 | ||
1457 | /* | |
1458 | * do_QDIO could run in parallel with the queue tasklet so the | |
1459 | * upper-layer programm could empty the ACK'ed buffer here. | |
1460 | * If that happens we must clear the polling flag, otherwise | |
1461 | * qdio_stop_polling() could set the buffer to NOT_INIT after | |
1462 | * it was set to EMPTY which would kill us. | |
1463 | */ | |
1464 | spin_lock_irqsave(&q->u.in.lock, flags); | |
1465 | if (q->u.in.polling) | |
1466 | if (buf_in_between(q->last_move_ftc, bufnr, count)) | |
1467 | q->u.in.polling = 0; | |
1468 | ||
1469 | count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count); | |
1470 | spin_unlock_irqrestore(&q->u.in.lock, flags); | |
1471 | ||
1472 | used = atomic_add_return(count, &q->nr_buf_used) - count; | |
1473 | BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q); | |
1474 | ||
1475 | /* no need to signal as long as the adapter had free buffers */ | |
1476 | if (used) | |
1477 | return; | |
1478 | ||
1479 | if (need_siga_in(q)) { | |
1480 | rc = qdio_siga_input(q); | |
1481 | if (rc) | |
1482 | q->qdio_error = rc; | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /** | |
1487 | * handle_outbound - process filled outbound buffers | |
1488 | * @q: queue containing the buffers | |
1489 | * @callflags: flags | |
1490 | * @bufnr: first buffer to process | |
1491 | * @count: how many buffers are filled | |
1492 | */ | |
1493 | static void handle_outbound(struct qdio_q *q, unsigned int callflags, | |
1494 | int bufnr, int count) | |
1495 | { | |
1496 | unsigned char state; | |
1497 | int used; | |
1498 | ||
1499 | qdio_perf_stat_inc(&perf_stats.outbound_handler); | |
1500 | ||
1501 | count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count); | |
1502 | used = atomic_add_return(count, &q->nr_buf_used); | |
1503 | BUG_ON(used > QDIO_MAX_BUFFERS_PER_Q); | |
1504 | ||
1505 | if (callflags & QDIO_FLAG_PCI_OUT) | |
1506 | q->u.out.pci_out_enabled = 1; | |
1507 | else | |
1508 | q->u.out.pci_out_enabled = 0; | |
1509 | ||
1510 | if (queue_type(q) == QDIO_IQDIO_QFMT) { | |
1511 | if (multicast_outbound(q)) | |
1512 | qdio_kick_outbound_q(q); | |
1513 | else | |
7a0f4755 KDW |
1514 | if ((q->irq_ptr->ssqd_desc.mmwc > 1) && |
1515 | (count > 1) && | |
1516 | (count <= q->irq_ptr->ssqd_desc.mmwc)) { | |
1517 | /* exploit enhanced SIGA */ | |
1518 | q->u.out.use_enh_siga = 1; | |
779e6e1c | 1519 | qdio_kick_outbound_q(q); |
7a0f4755 KDW |
1520 | } else { |
1521 | /* | |
1522 | * One siga-w per buffer required for unicast | |
1523 | * HiperSockets. | |
1524 | */ | |
1525 | q->u.out.use_enh_siga = 0; | |
1526 | while (count--) | |
1527 | qdio_kick_outbound_q(q); | |
1528 | } | |
779e6e1c JG |
1529 | goto out; |
1530 | } | |
1531 | ||
1532 | if (need_siga_sync(q)) { | |
1533 | qdio_siga_sync_q(q); | |
1534 | goto out; | |
1535 | } | |
1536 | ||
1537 | /* try to fast requeue buffers */ | |
1538 | get_buf_state(q, prev_buf(bufnr), &state); | |
1539 | if (state != SLSB_CU_OUTPUT_PRIMED) | |
1540 | qdio_kick_outbound_q(q); | |
1541 | else { | |
22f99347 | 1542 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "fast-req"); |
779e6e1c JG |
1543 | qdio_perf_stat_inc(&perf_stats.fast_requeue); |
1544 | } | |
1545 | out: | |
1546 | /* Fixme: could wait forever if called from process context */ | |
1547 | tasklet_schedule(&q->tasklet); | |
1548 | } | |
1549 | ||
1550 | /** | |
1551 | * do_QDIO - process input or output buffers | |
1552 | * @cdev: associated ccw_device for the qdio subchannel | |
1553 | * @callflags: input or output and special flags from the program | |
1554 | * @q_nr: queue number | |
1555 | * @bufnr: buffer number | |
1556 | * @count: how many buffers to process | |
1557 | */ | |
1558 | int do_QDIO(struct ccw_device *cdev, unsigned int callflags, | |
1559 | int q_nr, int bufnr, int count) | |
1560 | { | |
1561 | struct qdio_irq *irq_ptr; | |
779e6e1c JG |
1562 | |
1563 | if ((bufnr > QDIO_MAX_BUFFERS_PER_Q) || | |
1564 | (count > QDIO_MAX_BUFFERS_PER_Q) || | |
1565 | (q_nr > QDIO_MAX_QUEUES_PER_IRQ)) | |
1566 | return -EINVAL; | |
1567 | ||
1568 | if (!count) | |
1569 | return 0; | |
1570 | ||
1571 | irq_ptr = cdev->private->qdio_data; | |
1572 | if (!irq_ptr) | |
1573 | return -ENODEV; | |
1574 | ||
779e6e1c | 1575 | if (callflags & QDIO_FLAG_SYNC_INPUT) |
22f99347 | 1576 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "doQDIO input"); |
779e6e1c | 1577 | else |
22f99347 JG |
1578 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "doQDIO output"); |
1579 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "q:%1d flag:%4x", q_nr, callflags); | |
1580 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "buf:%2d cnt:%3d", bufnr, count); | |
779e6e1c JG |
1581 | |
1582 | if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE) | |
1583 | return -EBUSY; | |
1584 | ||
1585 | if (callflags & QDIO_FLAG_SYNC_INPUT) | |
22f99347 JG |
1586 | handle_inbound(irq_ptr->input_qs[q_nr], callflags, bufnr, |
1587 | count); | |
779e6e1c | 1588 | else if (callflags & QDIO_FLAG_SYNC_OUTPUT) |
22f99347 JG |
1589 | handle_outbound(irq_ptr->output_qs[q_nr], callflags, bufnr, |
1590 | count); | |
1591 | else | |
779e6e1c | 1592 | return -EINVAL; |
779e6e1c JG |
1593 | return 0; |
1594 | } | |
1595 | EXPORT_SYMBOL_GPL(do_QDIO); | |
1596 | ||
1597 | static int __init init_QDIO(void) | |
1598 | { | |
1599 | int rc; | |
1600 | ||
1601 | rc = qdio_setup_init(); | |
1602 | if (rc) | |
1603 | return rc; | |
1604 | rc = tiqdio_allocate_memory(); | |
1605 | if (rc) | |
1606 | goto out_cache; | |
1607 | rc = qdio_debug_init(); | |
1608 | if (rc) | |
1609 | goto out_ti; | |
1610 | rc = qdio_setup_perf_stats(); | |
1611 | if (rc) | |
1612 | goto out_debug; | |
1613 | rc = tiqdio_register_thinints(); | |
1614 | if (rc) | |
1615 | goto out_perf; | |
1616 | return 0; | |
1617 | ||
1618 | out_perf: | |
1619 | qdio_remove_perf_stats(); | |
1620 | out_debug: | |
1621 | qdio_debug_exit(); | |
1622 | out_ti: | |
1623 | tiqdio_free_memory(); | |
1624 | out_cache: | |
1625 | qdio_setup_exit(); | |
1626 | return rc; | |
1627 | } | |
1628 | ||
1629 | static void __exit exit_QDIO(void) | |
1630 | { | |
1631 | tiqdio_unregister_thinints(); | |
1632 | tiqdio_free_memory(); | |
1633 | qdio_remove_perf_stats(); | |
1634 | qdio_debug_exit(); | |
1635 | qdio_setup_exit(); | |
1636 | } | |
1637 | ||
1638 | module_init(init_QDIO); | |
1639 | module_exit(exit_QDIO); |