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724117b7 | 1 | // SPDX-License-Identifier: GPL-2.0 |
779e6e1c | 2 | /* |
779e6e1c JG |
3 | * Linux for s390 qdio support, buffer handling, qdio API and module support. |
4 | * | |
a53c8fab | 5 | * Copyright IBM Corp. 2000, 2008 |
779e6e1c JG |
6 | * Author(s): Utz Bacher <utz.bacher@de.ibm.com> |
7 | * Jan Glauber <jang@linux.vnet.ibm.com> | |
8 | * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com> | |
9 | */ | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/timer.h> | |
14 | #include <linux/delay.h> | |
5a0e3ad6 | 15 | #include <linux/gfp.h> |
104ea556 | 16 | #include <linux/io.h> |
60063497 | 17 | #include <linux/atomic.h> |
779e6e1c JG |
18 | #include <asm/debug.h> |
19 | #include <asm/qdio.h> | |
3ab121ab | 20 | #include <asm/ipl.h> |
779e6e1c JG |
21 | |
22 | #include "cio.h" | |
23 | #include "css.h" | |
24 | #include "device.h" | |
25 | #include "qdio.h" | |
26 | #include "qdio_debug.h" | |
779e6e1c JG |
27 | |
28 | MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>,"\ | |
29 | "Jan Glauber <jang@linux.vnet.ibm.com>"); | |
30 | MODULE_DESCRIPTION("QDIO base support"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
958c0ba4 JG |
33 | static inline int do_siga_sync(unsigned long schid, |
34 | unsigned int out_mask, unsigned int in_mask, | |
35 | unsigned int fc) | |
779e6e1c | 36 | { |
958c0ba4 JG |
37 | register unsigned long __fc asm ("0") = fc; |
38 | register unsigned long __schid asm ("1") = schid; | |
779e6e1c JG |
39 | register unsigned long out asm ("2") = out_mask; |
40 | register unsigned long in asm ("3") = in_mask; | |
41 | int cc; | |
42 | ||
43 | asm volatile( | |
44 | " siga 0\n" | |
45 | " ipm %0\n" | |
46 | " srl %0,28\n" | |
47 | : "=d" (cc) | |
48 | : "d" (__fc), "d" (__schid), "d" (out), "d" (in) : "cc"); | |
49 | return cc; | |
50 | } | |
51 | ||
958c0ba4 JG |
52 | static inline int do_siga_input(unsigned long schid, unsigned int mask, |
53 | unsigned int fc) | |
779e6e1c | 54 | { |
958c0ba4 JG |
55 | register unsigned long __fc asm ("0") = fc; |
56 | register unsigned long __schid asm ("1") = schid; | |
779e6e1c JG |
57 | register unsigned long __mask asm ("2") = mask; |
58 | int cc; | |
59 | ||
60 | asm volatile( | |
61 | " siga 0\n" | |
62 | " ipm %0\n" | |
63 | " srl %0,28\n" | |
64 | : "=d" (cc) | |
1549d13f | 65 | : "d" (__fc), "d" (__schid), "d" (__mask) : "cc"); |
779e6e1c JG |
66 | return cc; |
67 | } | |
68 | ||
69 | /** | |
70 | * do_siga_output - perform SIGA-w/wt function | |
71 | * @schid: subchannel id or in case of QEBSM the subchannel token | |
72 | * @mask: which output queues to process | |
73 | * @bb: busy bit indicator, set only if SIGA-w/wt could not access a buffer | |
74 | * @fc: function code to perform | |
364e3f90 | 75 | * @aob: asynchronous operation block |
779e6e1c | 76 | * |
1549d13f | 77 | * Returns condition code. |
779e6e1c JG |
78 | * Note: For IQDC unicast queues only the highest priority queue is processed. |
79 | */ | |
80 | static inline int do_siga_output(unsigned long schid, unsigned long mask, | |
104ea556 | 81 | unsigned int *bb, unsigned int fc, |
82 | unsigned long aob) | |
779e6e1c JG |
83 | { |
84 | register unsigned long __fc asm("0") = fc; | |
85 | register unsigned long __schid asm("1") = schid; | |
86 | register unsigned long __mask asm("2") = mask; | |
104ea556 | 87 | register unsigned long __aob asm("3") = aob; |
1549d13f | 88 | int cc; |
779e6e1c JG |
89 | |
90 | asm volatile( | |
91 | " siga 0\n" | |
1549d13f | 92 | " ipm %0\n" |
779e6e1c | 93 | " srl %0,28\n" |
1549d13f JG |
94 | : "=d" (cc), "+d" (__fc), "+d" (__aob) |
95 | : "d" (__schid), "d" (__mask) | |
96 | : "cc"); | |
97 | *bb = __fc >> 31; | |
779e6e1c JG |
98 | return cc; |
99 | } | |
100 | ||
779e6e1c JG |
101 | /** |
102 | * qdio_do_eqbs - extract buffer states for QEBSM | |
103 | * @q: queue to manipulate | |
104 | * @state: state of the extracted buffers | |
105 | * @start: buffer number to start at | |
106 | * @count: count of buffers to examine | |
50f769df | 107 | * @auto_ack: automatically acknowledge buffers |
779e6e1c | 108 | * |
73ac36ea | 109 | * Returns the number of successfully extracted equal buffer states. |
779e6e1c JG |
110 | * Stops processing if a state is different from the last buffers state. |
111 | */ | |
112 | static int qdio_do_eqbs(struct qdio_q *q, unsigned char *state, | |
50f769df | 113 | int start, int count, int auto_ack) |
779e6e1c | 114 | { |
88bf319f | 115 | int tmp_count = count, tmp_start = start, nr = q->nr; |
779e6e1c | 116 | unsigned int ccq = 0; |
779e6e1c | 117 | |
6486cda6 | 118 | qperf_inc(q, eqbs); |
779e6e1c JG |
119 | |
120 | if (!q->is_input_q) | |
121 | nr += q->irq_ptr->nr_input_qs; | |
122 | again: | |
50f769df JG |
123 | ccq = do_eqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count, |
124 | auto_ack); | |
22f99347 | 125 | |
88bf319f JW |
126 | switch (ccq) { |
127 | case 0: | |
128 | case 32: | |
129 | /* all done, or next buffer state different */ | |
130 | return count - tmp_count; | |
131 | case 96: | |
132 | /* not all buffers processed */ | |
25f269f1 JG |
133 | qperf_inc(q, eqbs_partial); |
134 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS part:%02x", | |
135 | tmp_count); | |
dae55b6f | 136 | return count - tmp_count; |
88bf319f JW |
137 | case 97: |
138 | /* no buffer processed */ | |
139 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "EQBS again:%2d", ccq); | |
140 | goto again; | |
141 | default: | |
142 | DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq); | |
143 | DBF_ERROR("%4x EQBS ERROR", SCH_NO(q)); | |
144 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); | |
145 | q->handler(q->irq_ptr->cdev, QDIO_ERROR_GET_BUF_STATE, q->nr, | |
146 | q->first_to_kick, count, q->irq_ptr->int_parm); | |
147 | return 0; | |
779e6e1c | 148 | } |
779e6e1c JG |
149 | } |
150 | ||
151 | /** | |
152 | * qdio_do_sqbs - set buffer states for QEBSM | |
153 | * @q: queue to manipulate | |
154 | * @state: new state of the buffers | |
155 | * @start: first buffer number to change | |
156 | * @count: how many buffers to change | |
157 | * | |
158 | * Returns the number of successfully changed buffers. | |
159 | * Does retrying until the specified count of buffer states is set or an | |
160 | * error occurs. | |
161 | */ | |
162 | static int qdio_do_sqbs(struct qdio_q *q, unsigned char state, int start, | |
163 | int count) | |
164 | { | |
165 | unsigned int ccq = 0; | |
166 | int tmp_count = count, tmp_start = start; | |
167 | int nr = q->nr; | |
779e6e1c | 168 | |
50f769df JG |
169 | if (!count) |
170 | return 0; | |
6486cda6 | 171 | qperf_inc(q, sqbs); |
779e6e1c JG |
172 | |
173 | if (!q->is_input_q) | |
174 | nr += q->irq_ptr->nr_input_qs; | |
175 | again: | |
176 | ccq = do_sqbs(q->irq_ptr->sch_token, state, nr, &tmp_start, &tmp_count); | |
88bf319f JW |
177 | |
178 | switch (ccq) { | |
179 | case 0: | |
180 | case 32: | |
181 | /* all done, or active buffer adapter-owned */ | |
ce1d8014 | 182 | WARN_ON_ONCE(tmp_count); |
25f269f1 | 183 | return count - tmp_count; |
88bf319f JW |
184 | case 96: |
185 | /* not all buffers processed */ | |
22f99347 | 186 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "SQBS again:%2d", ccq); |
6486cda6 | 187 | qperf_inc(q, sqbs_partial); |
779e6e1c | 188 | goto again; |
88bf319f JW |
189 | default: |
190 | DBF_ERROR("%4x ccq:%3d", SCH_NO(q), ccq); | |
191 | DBF_ERROR("%4x SQBS ERROR", SCH_NO(q)); | |
192 | DBF_ERROR("%3d%3d%2d", count, tmp_count, nr); | |
193 | q->handler(q->irq_ptr->cdev, QDIO_ERROR_SET_BUF_STATE, q->nr, | |
194 | q->first_to_kick, count, q->irq_ptr->int_parm); | |
195 | return 0; | |
779e6e1c | 196 | } |
779e6e1c JG |
197 | } |
198 | ||
0cf1e051 JW |
199 | /* |
200 | * Returns number of examined buffers and their common state in *state. | |
201 | * Requested number of buffers-to-examine must be > 0. | |
202 | */ | |
779e6e1c | 203 | static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr, |
50f769df | 204 | unsigned char *state, unsigned int count, |
104ea556 | 205 | int auto_ack, int merge_pending) |
779e6e1c JG |
206 | { |
207 | unsigned char __state = 0; | |
a698e137 | 208 | int i = 1; |
779e6e1c | 209 | |
779e6e1c | 210 | if (is_qebsm(q)) |
50f769df | 211 | return qdio_do_eqbs(q, state, bufnr, count, auto_ack); |
779e6e1c | 212 | |
0cf1e051 JW |
213 | /* get initial state: */ |
214 | __state = q->slsb.val[bufnr]; | |
a698e137 JW |
215 | |
216 | /* Bail out early if there is no work on the queue: */ | |
217 | if (__state & SLSB_OWNER_CU) | |
218 | goto out; | |
219 | ||
0cf1e051 JW |
220 | if (merge_pending && __state == SLSB_P_OUTPUT_PENDING) |
221 | __state = SLSB_P_OUTPUT_EMPTY; | |
222 | ||
a698e137 | 223 | for (; i < count; i++) { |
779e6e1c | 224 | bufnr = next_buf(bufnr); |
0cf1e051 JW |
225 | |
226 | /* merge PENDING into EMPTY: */ | |
227 | if (merge_pending && | |
228 | q->slsb.val[bufnr] == SLSB_P_OUTPUT_PENDING && | |
229 | __state == SLSB_P_OUTPUT_EMPTY) | |
230 | continue; | |
231 | ||
232 | /* stop if next state differs from initial state: */ | |
233 | if (q->slsb.val[bufnr] != __state) | |
234 | break; | |
779e6e1c | 235 | } |
a698e137 JW |
236 | |
237 | out: | |
779e6e1c JG |
238 | *state = __state; |
239 | return i; | |
240 | } | |
241 | ||
60b5df2f JG |
242 | static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr, |
243 | unsigned char *state, int auto_ack) | |
779e6e1c | 244 | { |
104ea556 | 245 | return get_buf_states(q, bufnr, state, 1, auto_ack, 0); |
779e6e1c JG |
246 | } |
247 | ||
248 | /* wrap-around safe setting of slsb states, returns number of changed buffers */ | |
249 | static inline int set_buf_states(struct qdio_q *q, int bufnr, | |
250 | unsigned char state, int count) | |
251 | { | |
252 | int i; | |
253 | ||
779e6e1c JG |
254 | if (is_qebsm(q)) |
255 | return qdio_do_sqbs(q, state, bufnr, count); | |
256 | ||
257 | for (i = 0; i < count; i++) { | |
258 | xchg(&q->slsb.val[bufnr], state); | |
259 | bufnr = next_buf(bufnr); | |
260 | } | |
261 | return count; | |
262 | } | |
263 | ||
264 | static inline int set_buf_state(struct qdio_q *q, int bufnr, | |
265 | unsigned char state) | |
266 | { | |
267 | return set_buf_states(q, bufnr, state, 1); | |
268 | } | |
269 | ||
270 | /* set slsb states to initial state */ | |
c4736d96 | 271 | static void qdio_init_buf_states(struct qdio_irq *irq_ptr) |
779e6e1c JG |
272 | { |
273 | struct qdio_q *q; | |
274 | int i; | |
275 | ||
276 | for_each_input_queue(irq_ptr, q, i) | |
277 | set_buf_states(q, 0, SLSB_P_INPUT_NOT_INIT, | |
278 | QDIO_MAX_BUFFERS_PER_Q); | |
279 | for_each_output_queue(irq_ptr, q, i) | |
280 | set_buf_states(q, 0, SLSB_P_OUTPUT_NOT_INIT, | |
281 | QDIO_MAX_BUFFERS_PER_Q); | |
282 | } | |
283 | ||
60b5df2f | 284 | static inline int qdio_siga_sync(struct qdio_q *q, unsigned int output, |
779e6e1c JG |
285 | unsigned int input) |
286 | { | |
958c0ba4 JG |
287 | unsigned long schid = *((u32 *) &q->irq_ptr->schid); |
288 | unsigned int fc = QDIO_SIGA_SYNC; | |
779e6e1c JG |
289 | int cc; |
290 | ||
7a0b4cbc | 291 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-s:%1d", q->nr); |
6486cda6 | 292 | qperf_inc(q, siga_sync); |
779e6e1c | 293 | |
958c0ba4 JG |
294 | if (is_qebsm(q)) { |
295 | schid = q->irq_ptr->sch_token; | |
296 | fc |= QDIO_SIGA_QEBSM_FLAG; | |
297 | } | |
298 | ||
299 | cc = do_siga_sync(schid, output, input, fc); | |
110da317 | 300 | if (unlikely(cc)) |
22f99347 | 301 | DBF_ERROR("%4x SIGA-S:%2d", SCH_NO(q), cc); |
1549d13f | 302 | return (cc) ? -EIO : 0; |
779e6e1c JG |
303 | } |
304 | ||
60b5df2f | 305 | static inline int qdio_siga_sync_q(struct qdio_q *q) |
779e6e1c JG |
306 | { |
307 | if (q->is_input_q) | |
308 | return qdio_siga_sync(q, 0, q->mask); | |
309 | else | |
310 | return qdio_siga_sync(q, q->mask, 0); | |
311 | } | |
312 | ||
104ea556 | 313 | static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit, |
314 | unsigned long aob) | |
779e6e1c | 315 | { |
958c0ba4 JG |
316 | unsigned long schid = *((u32 *) &q->irq_ptr->schid); |
317 | unsigned int fc = QDIO_SIGA_WRITE; | |
7a0b4cbc | 318 | u64 start_time = 0; |
be8d97a5 | 319 | int retries = 0, cc; |
104ea556 | 320 | unsigned long laob = 0; |
321 | ||
69e96207 | 322 | if (aob) { |
104ea556 | 323 | fc = QDIO_SIGA_WRITEQ; |
324 | laob = aob; | |
325 | } | |
779e6e1c | 326 | |
7a0b4cbc | 327 | if (is_qebsm(q)) { |
779e6e1c | 328 | schid = q->irq_ptr->sch_token; |
958c0ba4 | 329 | fc |= QDIO_SIGA_QEBSM_FLAG; |
779e6e1c | 330 | } |
779e6e1c | 331 | again: |
104ea556 | 332 | cc = do_siga_output(schid, q->mask, busy_bit, fc, laob); |
7a0b4cbc JG |
333 | |
334 | /* hipersocket busy condition */ | |
110da317 | 335 | if (unlikely(*busy_bit)) { |
be8d97a5 | 336 | retries++; |
58eb27cd | 337 | |
7a0b4cbc | 338 | if (!start_time) { |
8c071b0f | 339 | start_time = get_tod_clock_fast(); |
7a0b4cbc JG |
340 | goto again; |
341 | } | |
8c071b0f | 342 | if (get_tod_clock_fast() - start_time < QDIO_BUSY_BIT_PATIENCE) |
779e6e1c JG |
343 | goto again; |
344 | } | |
be8d97a5 JG |
345 | if (retries) { |
346 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, | |
347 | "%4x cc2 BB1:%1d", SCH_NO(q), q->nr); | |
348 | DBF_DEV_EVENT(DBF_WARN, q->irq_ptr, "count:%u", retries); | |
349 | } | |
779e6e1c JG |
350 | return cc; |
351 | } | |
352 | ||
353 | static inline int qdio_siga_input(struct qdio_q *q) | |
354 | { | |
958c0ba4 JG |
355 | unsigned long schid = *((u32 *) &q->irq_ptr->schid); |
356 | unsigned int fc = QDIO_SIGA_READ; | |
779e6e1c JG |
357 | int cc; |
358 | ||
22f99347 | 359 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-r:%1d", q->nr); |
6486cda6 | 360 | qperf_inc(q, siga_read); |
779e6e1c | 361 | |
958c0ba4 JG |
362 | if (is_qebsm(q)) { |
363 | schid = q->irq_ptr->sch_token; | |
364 | fc |= QDIO_SIGA_QEBSM_FLAG; | |
365 | } | |
366 | ||
367 | cc = do_siga_input(schid, q->mask, fc); | |
110da317 | 368 | if (unlikely(cc)) |
22f99347 | 369 | DBF_ERROR("%4x SIGA-R:%2d", SCH_NO(q), cc); |
1549d13f | 370 | return (cc) ? -EIO : 0; |
779e6e1c JG |
371 | } |
372 | ||
90adac58 JG |
373 | #define qdio_siga_sync_out(q) qdio_siga_sync(q, ~0U, 0) |
374 | #define qdio_siga_sync_all(q) qdio_siga_sync(q, ~0U, ~0U) | |
375 | ||
376 | static inline void qdio_sync_queues(struct qdio_q *q) | |
779e6e1c | 377 | { |
90adac58 | 378 | /* PCI capable outbound queues will also be scanned so sync them too */ |
f85b2b29 | 379 | if (pci_out_supported(q->irq_ptr)) |
90adac58 JG |
380 | qdio_siga_sync_all(q); |
381 | else | |
779e6e1c JG |
382 | qdio_siga_sync_q(q); |
383 | } | |
384 | ||
60b5df2f JG |
385 | int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr, |
386 | unsigned char *state) | |
387 | { | |
90adac58 JG |
388 | if (need_siga_sync(q)) |
389 | qdio_siga_sync_q(q); | |
5a19d670 | 390 | return get_buf_state(q, bufnr, state, 0); |
60b5df2f JG |
391 | } |
392 | ||
393 | static inline void qdio_stop_polling(struct qdio_q *q) | |
779e6e1c | 394 | { |
50f769df | 395 | if (!q->u.in.polling) |
779e6e1c | 396 | return; |
50f769df | 397 | |
779e6e1c | 398 | q->u.in.polling = 0; |
6486cda6 | 399 | qperf_inc(q, stop_polling); |
779e6e1c JG |
400 | |
401 | /* show the card that we are not polling anymore */ | |
50f769df | 402 | if (is_qebsm(q)) { |
e85dea0e | 403 | set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, |
50f769df JG |
404 | q->u.in.ack_count); |
405 | q->u.in.ack_count = 0; | |
406 | } else | |
e85dea0e | 407 | set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); |
779e6e1c JG |
408 | } |
409 | ||
92bdae5d | 410 | static inline void account_sbals(struct qdio_q *q, unsigned int count) |
d307297f | 411 | { |
92bdae5d | 412 | int pos; |
d307297f JG |
413 | |
414 | q->q_stats.nr_sbal_total += count; | |
415 | if (count == QDIO_MAX_BUFFERS_MASK) { | |
416 | q->q_stats.nr_sbals[7]++; | |
417 | return; | |
418 | } | |
92bdae5d | 419 | pos = ilog2(count); |
d307297f JG |
420 | q->q_stats.nr_sbals[pos]++; |
421 | } | |
422 | ||
5b2ad270 JW |
423 | static void process_buffer_error(struct qdio_q *q, unsigned int start, |
424 | int count) | |
779e6e1c | 425 | { |
bffbbd2d JG |
426 | unsigned char state = (q->is_input_q) ? SLSB_P_INPUT_NOT_INIT : |
427 | SLSB_P_OUTPUT_NOT_INIT; | |
428 | ||
1549d13f | 429 | q->qdio_error = QDIO_ERROR_SLSB_STATE; |
50f769df JG |
430 | |
431 | /* special handling for no target buffer empty */ | |
b23481fb | 432 | if (queue_type(q) == QDIO_IQDIO_QFMT && !q->is_input_q && |
5b2ad270 | 433 | q->sbal[start]->element[15].sflags == 0x10) { |
6486cda6 | 434 | qperf_inc(q, target_full); |
5b2ad270 | 435 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x", start); |
2768b2de | 436 | goto set; |
50f769df JG |
437 | } |
438 | ||
22f99347 JG |
439 | DBF_ERROR("%4x BUF ERROR", SCH_NO(q)); |
440 | DBF_ERROR((q->is_input_q) ? "IN:%2d" : "OUT:%2d", q->nr); | |
5b2ad270 | 441 | DBF_ERROR("FTC:%3d C:%3d", start, count); |
22f99347 | 442 | DBF_ERROR("F14:%2x F15:%2x", |
5b2ad270 JW |
443 | q->sbal[start]->element[14].sflags, |
444 | q->sbal[start]->element[15].sflags); | |
bffbbd2d | 445 | |
2768b2de | 446 | set: |
bffbbd2d JG |
447 | /* |
448 | * Interrupts may be avoided as long as the error is present | |
449 | * so change the buffer state immediately to avoid starvation. | |
450 | */ | |
5b2ad270 | 451 | set_buf_states(q, start, state, count); |
50f769df | 452 | } |
779e6e1c | 453 | |
5b2ad270 JW |
454 | static inline void inbound_primed(struct qdio_q *q, unsigned int start, |
455 | int count) | |
50f769df JG |
456 | { |
457 | int new; | |
458 | ||
f83435c4 | 459 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in prim:%1d %02x", q->nr, count); |
50f769df JG |
460 | |
461 | /* for QEBSM the ACK was already set by EQBS */ | |
462 | if (is_qebsm(q)) { | |
463 | if (!q->u.in.polling) { | |
464 | q->u.in.polling = 1; | |
465 | q->u.in.ack_count = count; | |
5b2ad270 | 466 | q->u.in.ack_start = start; |
50f769df JG |
467 | return; |
468 | } | |
469 | ||
470 | /* delete the previous ACK's */ | |
e85dea0e | 471 | set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT, |
50f769df JG |
472 | q->u.in.ack_count); |
473 | q->u.in.ack_count = count; | |
5b2ad270 | 474 | q->u.in.ack_start = start; |
50f769df JG |
475 | return; |
476 | } | |
477 | ||
478 | /* | |
479 | * ACK the newest buffer. The ACK will be removed in qdio_stop_polling | |
480 | * or by the next inbound run. | |
481 | */ | |
5b2ad270 | 482 | new = add_buf(start, count - 1); |
50f769df JG |
483 | if (q->u.in.polling) { |
484 | /* reset the previous ACK but first set the new one */ | |
485 | set_buf_state(q, new, SLSB_P_INPUT_ACK); | |
e85dea0e | 486 | set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT); |
3fdf1e18 | 487 | } else { |
50f769df | 488 | q->u.in.polling = 1; |
3fdf1e18 | 489 | set_buf_state(q, new, SLSB_P_INPUT_ACK); |
50f769df JG |
490 | } |
491 | ||
e85dea0e | 492 | q->u.in.ack_start = new; |
50f769df JG |
493 | count--; |
494 | if (!count) | |
495 | return; | |
6541f7b6 | 496 | /* need to change ALL buffers to get more interrupts */ |
5b2ad270 | 497 | set_buf_states(q, start, SLSB_P_INPUT_NOT_INIT, count); |
779e6e1c JG |
498 | } |
499 | ||
6bcf74e2 | 500 | static int get_inbound_buffer_frontier(struct qdio_q *q, unsigned int start) |
779e6e1c | 501 | { |
6fa1098a | 502 | unsigned char state = 0; |
152485bf | 503 | int count; |
779e6e1c | 504 | |
8c071b0f | 505 | q->timestamp = get_tod_clock_fast(); |
a2b86019 | 506 | |
779e6e1c JG |
507 | /* |
508 | * Don't check 128 buffers, as otherwise qdio_inbound_q_moved | |
509 | * would return 0. | |
510 | */ | |
511 | count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK); | |
152485bf | 512 | if (!count) |
b39544c6 | 513 | return 0; |
779e6e1c | 514 | |
36e3e721 JG |
515 | /* |
516 | * No siga sync here, as a PCI or we after a thin interrupt | |
517 | * already sync'ed the queues. | |
518 | */ | |
5b2ad270 | 519 | count = get_buf_states(q, start, &state, count, 1, 0); |
779e6e1c | 520 | if (!count) |
b39544c6 | 521 | return 0; |
779e6e1c JG |
522 | |
523 | switch (state) { | |
524 | case SLSB_P_INPUT_PRIMED: | |
5b2ad270 | 525 | inbound_primed(q, start, count); |
eddf0d5b | 526 | if (atomic_sub_return(count, &q->nr_buf_used) == 0) |
6486cda6 | 527 | qperf_inc(q, inbound_queue_full); |
d307297f JG |
528 | if (q->irq_ptr->perf_stat_enabled) |
529 | account_sbals(q, count); | |
b39544c6 | 530 | return count; |
779e6e1c | 531 | case SLSB_P_INPUT_ERROR: |
5b2ad270 | 532 | process_buffer_error(q, start, count); |
0b926ac3 JW |
533 | if (atomic_sub_return(count, &q->nr_buf_used) == 0) |
534 | qperf_inc(q, inbound_queue_full); | |
d307297f JG |
535 | if (q->irq_ptr->perf_stat_enabled) |
536 | account_sbals_error(q, count); | |
b39544c6 | 537 | return count; |
779e6e1c JG |
538 | case SLSB_CU_INPUT_EMPTY: |
539 | case SLSB_P_INPUT_NOT_INIT: | |
540 | case SLSB_P_INPUT_ACK: | |
d307297f JG |
541 | if (q->irq_ptr->perf_stat_enabled) |
542 | q->q_stats.nr_sbal_nop++; | |
f83435c4 | 543 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in nop:%1d %#02x", |
5b2ad270 | 544 | q->nr, start); |
b39544c6 | 545 | return 0; |
779e6e1c | 546 | default: |
ce1d8014 | 547 | WARN_ON_ONCE(1); |
b39544c6 | 548 | return 0; |
779e6e1c | 549 | } |
779e6e1c JG |
550 | } |
551 | ||
6bcf74e2 | 552 | static int qdio_inbound_q_moved(struct qdio_q *q, unsigned int start) |
779e6e1c | 553 | { |
b39544c6 | 554 | int count; |
779e6e1c | 555 | |
6bcf74e2 | 556 | count = get_inbound_buffer_frontier(q, start); |
779e6e1c | 557 | |
dccbbaff JW |
558 | if (count && !is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR) |
559 | q->u.in.timestamp = get_tod_clock(); | |
b39544c6 JW |
560 | |
561 | return count; | |
779e6e1c JG |
562 | } |
563 | ||
6bcf74e2 | 564 | static inline int qdio_inbound_q_done(struct qdio_q *q, unsigned int start) |
779e6e1c | 565 | { |
9a1ce28a | 566 | unsigned char state = 0; |
779e6e1c JG |
567 | |
568 | if (!atomic_read(&q->nr_buf_used)) | |
569 | return 1; | |
570 | ||
90adac58 JG |
571 | if (need_siga_sync(q)) |
572 | qdio_siga_sync_q(q); | |
5b2ad270 | 573 | get_buf_state(q, start, &state, 0); |
9a2c160a | 574 | |
4c52228d | 575 | if (state == SLSB_P_INPUT_PRIMED || state == SLSB_P_INPUT_ERROR) |
9a2c160a | 576 | /* more work coming */ |
779e6e1c JG |
577 | return 0; |
578 | ||
9a2c160a JG |
579 | if (is_thinint_irq(q->irq_ptr)) |
580 | return 1; | |
581 | ||
582 | /* don't poll under z/VM */ | |
583 | if (MACHINE_IS_VM) | |
779e6e1c JG |
584 | return 1; |
585 | ||
586 | /* | |
587 | * At this point we know, that inbound first_to_check | |
588 | * has (probably) not moved (see qdio_inbound_processing). | |
589 | */ | |
8c071b0f | 590 | if (get_tod_clock_fast() > q->u.in.timestamp + QDIO_INPUT_THRESHOLD) { |
5b2ad270 | 591 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "in done:%02x", start); |
779e6e1c | 592 | return 1; |
9a2c160a | 593 | } else |
60b5df2f | 594 | return 0; |
60b5df2f JG |
595 | } |
596 | ||
104ea556 | 597 | static inline void qdio_handle_aobs(struct qdio_q *q, int start, int count) |
598 | { | |
599 | unsigned char state = 0; | |
600 | int j, b = start; | |
601 | ||
104ea556 | 602 | for (j = 0; j < count; ++j) { |
603 | get_buf_state(q, b, &state, 0); | |
604 | if (state == SLSB_P_OUTPUT_PENDING) { | |
605 | struct qaob *aob = q->u.out.aobs[b]; | |
606 | if (aob == NULL) | |
607 | continue; | |
608 | ||
104ea556 | 609 | q->u.out.sbal_state[b].flags |= |
610 | QDIO_OUTBUF_STATE_FLAG_PENDING; | |
611 | q->u.out.aobs[b] = NULL; | |
104ea556 | 612 | } |
613 | b = next_buf(b); | |
614 | } | |
615 | } | |
616 | ||
617 | static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q, | |
618 | int bufnr) | |
619 | { | |
620 | unsigned long phys_aob = 0; | |
621 | ||
104ea556 | 622 | if (!q->aobs[bufnr]) { |
623 | struct qaob *aob = qdio_allocate_aob(); | |
624 | q->aobs[bufnr] = aob; | |
625 | } | |
626 | if (q->aobs[bufnr]) { | |
104ea556 | 627 | q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user; |
628 | phys_aob = virt_to_phys(q->aobs[bufnr]); | |
ce1d8014 | 629 | WARN_ON_ONCE(phys_aob & 0xFF); |
104ea556 | 630 | } |
631 | ||
64e03ff7 | 632 | q->sbal_state[bufnr].flags = 0; |
104ea556 | 633 | return phys_aob; |
634 | } | |
635 | ||
65e4f776 | 636 | static void qdio_kick_handler(struct qdio_q *q, unsigned int count) |
779e6e1c | 637 | { |
9c8a08d7 | 638 | int start = q->first_to_kick; |
779e6e1c JG |
639 | |
640 | if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) | |
641 | return; | |
642 | ||
9c8a08d7 | 643 | if (q->is_input_q) { |
6486cda6 | 644 | qperf_inc(q, inbound_handler); |
1d7e1500 | 645 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%02x c:%02x", start, count); |
bd6e8a16 | 646 | } else { |
6486cda6 | 647 | qperf_inc(q, outbound_handler); |
1d7e1500 JG |
648 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: s:%02x c:%02x", |
649 | start, count); | |
ccc413f6 JW |
650 | if (q->u.out.use_cq) |
651 | qdio_handle_aobs(q, start, count); | |
bd6e8a16 | 652 | } |
9c8a08d7 JG |
653 | |
654 | q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count, | |
655 | q->irq_ptr->int_parm); | |
779e6e1c JG |
656 | |
657 | /* for the next time */ | |
65e4f776 | 658 | q->first_to_kick = add_buf(start, count); |
779e6e1c JG |
659 | q->qdio_error = 0; |
660 | } | |
661 | ||
9bce8b2c UB |
662 | static inline int qdio_tasklet_schedule(struct qdio_q *q) |
663 | { | |
664 | if (likely(q->irq_ptr->state == QDIO_IRQ_STATE_ACTIVE)) { | |
665 | tasklet_schedule(&q->tasklet); | |
666 | return 0; | |
667 | } | |
668 | return -EPERM; | |
669 | } | |
670 | ||
779e6e1c JG |
671 | static void __qdio_inbound_processing(struct qdio_q *q) |
672 | { | |
6bcf74e2 | 673 | unsigned int start = q->first_to_check; |
b39544c6 JW |
674 | int count; |
675 | ||
6486cda6 | 676 | qperf_inc(q, tasklet_inbound); |
f3eb20fa | 677 | |
6bcf74e2 | 678 | count = qdio_inbound_q_moved(q, start); |
b39544c6 | 679 | if (count == 0) |
779e6e1c JG |
680 | return; |
681 | ||
6bcf74e2 JW |
682 | start = add_buf(start, count); |
683 | q->first_to_check = start; | |
65e4f776 | 684 | qdio_kick_handler(q, count); |
779e6e1c | 685 | |
6bcf74e2 | 686 | if (!qdio_inbound_q_done(q, start)) { |
779e6e1c | 687 | /* means poll time is not yet over */ |
6486cda6 | 688 | qperf_inc(q, tasklet_inbound_resched); |
9bce8b2c | 689 | if (!qdio_tasklet_schedule(q)) |
f3eb20fa | 690 | return; |
6486cda6 | 691 | } |
779e6e1c JG |
692 | |
693 | qdio_stop_polling(q); | |
694 | /* | |
695 | * We need to check again to not lose initiative after | |
696 | * resetting the ACK state. | |
697 | */ | |
6bcf74e2 | 698 | if (!qdio_inbound_q_done(q, start)) { |
6486cda6 | 699 | qperf_inc(q, tasklet_inbound_resched2); |
9bce8b2c | 700 | qdio_tasklet_schedule(q); |
6486cda6 | 701 | } |
779e6e1c JG |
702 | } |
703 | ||
779e6e1c JG |
704 | void qdio_inbound_processing(unsigned long data) |
705 | { | |
706 | struct qdio_q *q = (struct qdio_q *)data; | |
707 | __qdio_inbound_processing(q); | |
708 | } | |
709 | ||
6bcf74e2 | 710 | static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start) |
779e6e1c | 711 | { |
6fa1098a | 712 | unsigned char state = 0; |
152485bf | 713 | int count; |
779e6e1c | 714 | |
8c071b0f | 715 | q->timestamp = get_tod_clock_fast(); |
a2b86019 | 716 | |
90adac58 JG |
717 | if (need_siga_sync(q)) |
718 | if (((queue_type(q) != QDIO_IQDIO_QFMT) && | |
f85b2b29 | 719 | !pci_out_supported(q->irq_ptr)) || |
90adac58 JG |
720 | (queue_type(q) == QDIO_IQDIO_QFMT && |
721 | multicast_outbound(q))) | |
722 | qdio_siga_sync_q(q); | |
779e6e1c | 723 | |
3060781f | 724 | count = atomic_read(&q->nr_buf_used); |
152485bf | 725 | if (!count) |
b39544c6 | 726 | return 0; |
779e6e1c | 727 | |
5b2ad270 | 728 | count = get_buf_states(q, start, &state, count, 0, q->u.out.use_cq); |
779e6e1c | 729 | if (!count) |
b39544c6 | 730 | return 0; |
779e6e1c JG |
731 | |
732 | switch (state) { | |
733 | case SLSB_P_OUTPUT_EMPTY: | |
04310324 | 734 | case SLSB_P_OUTPUT_PENDING: |
779e6e1c | 735 | /* the adapter got it */ |
104ea556 | 736 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, |
737 | "out empty:%1d %02x", q->nr, count); | |
779e6e1c JG |
738 | |
739 | atomic_sub(count, &q->nr_buf_used); | |
d307297f JG |
740 | if (q->irq_ptr->perf_stat_enabled) |
741 | account_sbals(q, count); | |
b39544c6 | 742 | return count; |
779e6e1c | 743 | case SLSB_P_OUTPUT_ERROR: |
5b2ad270 | 744 | process_buffer_error(q, start, count); |
779e6e1c | 745 | atomic_sub(count, &q->nr_buf_used); |
d307297f JG |
746 | if (q->irq_ptr->perf_stat_enabled) |
747 | account_sbals_error(q, count); | |
b39544c6 | 748 | return count; |
779e6e1c JG |
749 | case SLSB_CU_OUTPUT_PRIMED: |
750 | /* the adapter has not fetched the output yet */ | |
d307297f JG |
751 | if (q->irq_ptr->perf_stat_enabled) |
752 | q->q_stats.nr_sbal_nop++; | |
104ea556 | 753 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out primed:%1d", |
754 | q->nr); | |
b39544c6 | 755 | return 0; |
779e6e1c JG |
756 | case SLSB_P_OUTPUT_NOT_INIT: |
757 | case SLSB_P_OUTPUT_HALTED: | |
b39544c6 | 758 | return 0; |
779e6e1c | 759 | default: |
ce1d8014 | 760 | WARN_ON_ONCE(1); |
b39544c6 | 761 | return 0; |
779e6e1c | 762 | } |
779e6e1c JG |
763 | } |
764 | ||
765 | /* all buffers processed? */ | |
766 | static inline int qdio_outbound_q_done(struct qdio_q *q) | |
767 | { | |
768 | return atomic_read(&q->nr_buf_used) == 0; | |
769 | } | |
770 | ||
6bcf74e2 | 771 | static inline int qdio_outbound_q_moved(struct qdio_q *q, unsigned int start) |
779e6e1c | 772 | { |
b39544c6 | 773 | int count; |
779e6e1c | 774 | |
6bcf74e2 | 775 | count = get_outbound_buffer_frontier(q, start); |
779e6e1c | 776 | |
dccbbaff | 777 | if (count) |
22f99347 | 778 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr); |
b39544c6 JW |
779 | |
780 | return count; | |
779e6e1c JG |
781 | } |
782 | ||
104ea556 | 783 | static int qdio_kick_outbound_q(struct qdio_q *q, unsigned long aob) |
779e6e1c | 784 | { |
be8d97a5 | 785 | int retries = 0, cc; |
7a0b4cbc | 786 | unsigned int busy_bit; |
779e6e1c JG |
787 | |
788 | if (!need_siga_out(q)) | |
d303b6fd | 789 | return 0; |
779e6e1c | 790 | |
7a0b4cbc | 791 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w:%1d", q->nr); |
be8d97a5 | 792 | retry: |
6486cda6 | 793 | qperf_inc(q, siga_write); |
7a0b4cbc | 794 | |
104ea556 | 795 | cc = qdio_siga_output(q, &busy_bit, aob); |
7a0b4cbc | 796 | switch (cc) { |
779e6e1c | 797 | case 0: |
779e6e1c | 798 | break; |
7a0b4cbc JG |
799 | case 2: |
800 | if (busy_bit) { | |
be8d97a5 JG |
801 | while (++retries < QDIO_BUSY_BIT_RETRIES) { |
802 | mdelay(QDIO_BUSY_BIT_RETRY_DELAY); | |
803 | goto retry; | |
804 | } | |
805 | DBF_ERROR("%4x cc2 BBC:%1d", SCH_NO(q), q->nr); | |
1549d13f JG |
806 | cc = -EBUSY; |
807 | } else { | |
d303b6fd | 808 | DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "siga-w cc2:%1d", q->nr); |
1549d13f JG |
809 | cc = -ENOBUFS; |
810 | } | |
7a0b4cbc JG |
811 | break; |
812 | case 1: | |
813 | case 3: | |
814 | DBF_ERROR("%4x SIGA-W:%1d", SCH_NO(q), cc); | |
1549d13f | 815 | cc = -EIO; |
7a0b4cbc | 816 | break; |
779e6e1c | 817 | } |
be8d97a5 JG |
818 | if (retries) { |
819 | DBF_ERROR("%4x cc2 BB2:%1d", SCH_NO(q), q->nr); | |
820 | DBF_ERROR("count:%u", retries); | |
821 | } | |
d303b6fd | 822 | return cc; |
779e6e1c JG |
823 | } |
824 | ||
779e6e1c JG |
825 | static void __qdio_outbound_processing(struct qdio_q *q) |
826 | { | |
6bcf74e2 | 827 | unsigned int start = q->first_to_check; |
b39544c6 JW |
828 | int count; |
829 | ||
6486cda6 | 830 | qperf_inc(q, tasklet_outbound); |
ce1d8014 | 831 | WARN_ON_ONCE(atomic_read(&q->nr_buf_used) < 0); |
779e6e1c | 832 | |
6bcf74e2 JW |
833 | count = qdio_outbound_q_moved(q, start); |
834 | if (count) { | |
835 | q->first_to_check = add_buf(start, count); | |
65e4f776 | 836 | qdio_kick_handler(q, count); |
6bcf74e2 | 837 | } |
779e6e1c | 838 | |
f85b2b29 JW |
839 | if (queue_type(q) == QDIO_ZFCP_QFMT && !pci_out_supported(q->irq_ptr) && |
840 | !qdio_outbound_q_done(q)) | |
841 | goto sched; | |
779e6e1c | 842 | |
779e6e1c JG |
843 | if (q->u.out.pci_out_enabled) |
844 | return; | |
845 | ||
846 | /* | |
847 | * Now we know that queue type is either qeth without pci enabled | |
25f269f1 JG |
848 | * or HiperSockets. Make sure buffer switch from PRIMED to EMPTY |
849 | * is noticed and outbound_handler is called after some time. | |
779e6e1c JG |
850 | */ |
851 | if (qdio_outbound_q_done(q)) | |
9bce8b2c | 852 | del_timer_sync(&q->u.out.timer); |
6486cda6 | 853 | else |
9bce8b2c UB |
854 | if (!timer_pending(&q->u.out.timer) && |
855 | likely(q->irq_ptr->state == QDIO_IRQ_STATE_ACTIVE)) | |
779e6e1c | 856 | mod_timer(&q->u.out.timer, jiffies + 10 * HZ); |
c38f9608 JG |
857 | return; |
858 | ||
859 | sched: | |
9bce8b2c | 860 | qdio_tasklet_schedule(q); |
779e6e1c JG |
861 | } |
862 | ||
863 | /* outbound tasklet */ | |
864 | void qdio_outbound_processing(unsigned long data) | |
865 | { | |
866 | struct qdio_q *q = (struct qdio_q *)data; | |
867 | __qdio_outbound_processing(q); | |
868 | } | |
869 | ||
cb9f780a | 870 | void qdio_outbound_timer(struct timer_list *t) |
779e6e1c | 871 | { |
cb9f780a | 872 | struct qdio_q *q = from_timer(q, t, u.out.timer); |
c38f9608 | 873 | |
9bce8b2c | 874 | qdio_tasklet_schedule(q); |
779e6e1c JG |
875 | } |
876 | ||
2f2f3839 | 877 | static inline void qdio_check_outbound_pci_queues(struct qdio_irq *irq) |
779e6e1c JG |
878 | { |
879 | struct qdio_q *out; | |
880 | int i; | |
881 | ||
f85b2b29 | 882 | if (!pci_out_supported(irq)) |
779e6e1c JG |
883 | return; |
884 | ||
f85b2b29 | 885 | for_each_output_queue(irq, out, i) |
779e6e1c | 886 | if (!qdio_outbound_q_done(out)) |
9bce8b2c | 887 | qdio_tasklet_schedule(out); |
779e6e1c JG |
888 | } |
889 | ||
60b5df2f JG |
890 | static void __tiqdio_inbound_processing(struct qdio_q *q) |
891 | { | |
6bcf74e2 | 892 | unsigned int start = q->first_to_check; |
b39544c6 JW |
893 | int count; |
894 | ||
6486cda6 | 895 | qperf_inc(q, tasklet_inbound); |
90adac58 JG |
896 | if (need_siga_sync(q) && need_siga_sync_after_ai(q)) |
897 | qdio_sync_queues(q); | |
60b5df2f | 898 | |
2f2f3839 JW |
899 | /* The interrupt could be caused by a PCI request: */ |
900 | qdio_check_outbound_pci_queues(q->irq_ptr); | |
60b5df2f | 901 | |
6bcf74e2 | 902 | count = qdio_inbound_q_moved(q, start); |
b39544c6 | 903 | if (count == 0) |
60b5df2f JG |
904 | return; |
905 | ||
6bcf74e2 JW |
906 | start = add_buf(start, count); |
907 | q->first_to_check = start; | |
65e4f776 | 908 | qdio_kick_handler(q, count); |
60b5df2f | 909 | |
6bcf74e2 | 910 | if (!qdio_inbound_q_done(q, start)) { |
6486cda6 | 911 | qperf_inc(q, tasklet_inbound_resched); |
9bce8b2c | 912 | if (!qdio_tasklet_schedule(q)) |
e2910bcf | 913 | return; |
60b5df2f JG |
914 | } |
915 | ||
916 | qdio_stop_polling(q); | |
917 | /* | |
918 | * We need to check again to not lose initiative after | |
919 | * resetting the ACK state. | |
920 | */ | |
6bcf74e2 | 921 | if (!qdio_inbound_q_done(q, start)) { |
6486cda6 | 922 | qperf_inc(q, tasklet_inbound_resched2); |
9bce8b2c | 923 | qdio_tasklet_schedule(q); |
60b5df2f JG |
924 | } |
925 | } | |
926 | ||
927 | void tiqdio_inbound_processing(unsigned long data) | |
928 | { | |
929 | struct qdio_q *q = (struct qdio_q *)data; | |
930 | __tiqdio_inbound_processing(q); | |
931 | } | |
932 | ||
779e6e1c JG |
933 | static inline void qdio_set_state(struct qdio_irq *irq_ptr, |
934 | enum qdio_irq_states state) | |
935 | { | |
22f99347 | 936 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "newstate: %1d", state); |
779e6e1c JG |
937 | |
938 | irq_ptr->state = state; | |
939 | mb(); | |
940 | } | |
941 | ||
22f99347 | 942 | static void qdio_irq_check_sense(struct qdio_irq *irq_ptr, struct irb *irb) |
779e6e1c | 943 | { |
779e6e1c | 944 | if (irb->esw.esw0.erw.cons) { |
22f99347 JG |
945 | DBF_ERROR("%4x sense:", irq_ptr->schid.sch_no); |
946 | DBF_ERROR_HEX(irb, 64); | |
947 | DBF_ERROR_HEX(irb->ecw, 64); | |
779e6e1c JG |
948 | } |
949 | } | |
950 | ||
951 | /* PCI interrupt handler */ | |
952 | static void qdio_int_handler_pci(struct qdio_irq *irq_ptr) | |
953 | { | |
954 | int i; | |
955 | struct qdio_q *q; | |
956 | ||
9bce8b2c | 957 | if (unlikely(irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) |
c38f9608 JG |
958 | return; |
959 | ||
d36deae7 JG |
960 | for_each_input_queue(irq_ptr, q, i) { |
961 | if (q->u.in.queue_start_poll) { | |
962 | /* skip if polling is enabled or already in work */ | |
963 | if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED, | |
964 | &q->u.in.queue_irq_state)) { | |
965 | qperf_inc(q, int_discarded); | |
966 | continue; | |
967 | } | |
968 | q->u.in.queue_start_poll(q->irq_ptr->cdev, q->nr, | |
969 | q->irq_ptr->int_parm); | |
104ea556 | 970 | } else { |
d36deae7 | 971 | tasklet_schedule(&q->tasklet); |
104ea556 | 972 | } |
d36deae7 | 973 | } |
779e6e1c | 974 | |
f85b2b29 | 975 | if (!pci_out_supported(irq_ptr)) |
779e6e1c JG |
976 | return; |
977 | ||
978 | for_each_output_queue(irq_ptr, q, i) { | |
979 | if (qdio_outbound_q_done(q)) | |
980 | continue; | |
90adac58 | 981 | if (need_siga_sync(q) && need_siga_sync_out_after_pci(q)) |
779e6e1c | 982 | qdio_siga_sync_q(q); |
9bce8b2c | 983 | qdio_tasklet_schedule(q); |
779e6e1c JG |
984 | } |
985 | } | |
986 | ||
987 | static void qdio_handle_activate_check(struct ccw_device *cdev, | |
988 | unsigned long intparm, int cstat, int dstat) | |
989 | { | |
990 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
991 | struct qdio_q *q; | |
dfe5bb50 | 992 | int count; |
779e6e1c | 993 | |
22f99347 JG |
994 | DBF_ERROR("%4x ACT CHECK", irq_ptr->schid.sch_no); |
995 | DBF_ERROR("intp :%lx", intparm); | |
996 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); | |
779e6e1c JG |
997 | |
998 | if (irq_ptr->nr_input_qs) { | |
999 | q = irq_ptr->input_qs[0]; | |
1000 | } else if (irq_ptr->nr_output_qs) { | |
1001 | q = irq_ptr->output_qs[0]; | |
1002 | } else { | |
1003 | dump_stack(); | |
1004 | goto no_handler; | |
1005 | } | |
dfe5bb50 SS |
1006 | |
1007 | count = sub_buf(q->first_to_check, q->first_to_kick); | |
1549d13f | 1008 | q->handler(q->irq_ptr->cdev, QDIO_ERROR_ACTIVATE, |
dfe5bb50 | 1009 | q->nr, q->first_to_kick, count, irq_ptr->int_parm); |
779e6e1c JG |
1010 | no_handler: |
1011 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); | |
3ab121ab MH |
1012 | /* |
1013 | * In case of z/VM LGR (Live Guest Migration) QDIO recovery will happen. | |
1014 | * Therefore we call the LGR detection function here. | |
1015 | */ | |
1016 | lgr_info_log(); | |
779e6e1c JG |
1017 | } |
1018 | ||
4c575423 JG |
1019 | static void qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, |
1020 | int dstat) | |
779e6e1c JG |
1021 | { |
1022 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
1023 | ||
4c575423 | 1024 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, "qest irq"); |
779e6e1c | 1025 | |
4c575423 | 1026 | if (cstat) |
779e6e1c | 1027 | goto error; |
4c575423 | 1028 | if (dstat & ~(DEV_STAT_DEV_END | DEV_STAT_CHN_END)) |
779e6e1c | 1029 | goto error; |
4c575423 JG |
1030 | if (!(dstat & DEV_STAT_DEV_END)) |
1031 | goto error; | |
1032 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ESTABLISHED); | |
1033 | return; | |
1034 | ||
779e6e1c | 1035 | error: |
22f99347 JG |
1036 | DBF_ERROR("%4x EQ:error", irq_ptr->schid.sch_no); |
1037 | DBF_ERROR("ds: %2x cs:%2x", dstat, cstat); | |
779e6e1c | 1038 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); |
779e6e1c JG |
1039 | } |
1040 | ||
1041 | /* qdio interrupt handler */ | |
1042 | void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm, | |
1043 | struct irb *irb) | |
1044 | { | |
1045 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
9080c924 | 1046 | struct subchannel_id schid; |
779e6e1c | 1047 | int cstat, dstat; |
779e6e1c | 1048 | |
779e6e1c | 1049 | if (!intparm || !irq_ptr) { |
9080c924 SO |
1050 | ccw_device_get_schid(cdev, &schid); |
1051 | DBF_ERROR("qint:%4x", schid.sch_no); | |
779e6e1c JG |
1052 | return; |
1053 | } | |
1054 | ||
09a308f3 JG |
1055 | if (irq_ptr->perf_stat_enabled) |
1056 | irq_ptr->perf_stat.qdio_int++; | |
1057 | ||
779e6e1c | 1058 | if (IS_ERR(irb)) { |
ce1d8014 JG |
1059 | DBF_ERROR("%4x IO error", irq_ptr->schid.sch_no); |
1060 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR); | |
1061 | wake_up(&cdev->private->wait_q); | |
1062 | return; | |
779e6e1c | 1063 | } |
22f99347 | 1064 | qdio_irq_check_sense(irq_ptr, irb); |
779e6e1c JG |
1065 | cstat = irb->scsw.cmd.cstat; |
1066 | dstat = irb->scsw.cmd.dstat; | |
1067 | ||
1068 | switch (irq_ptr->state) { | |
1069 | case QDIO_IRQ_STATE_INACTIVE: | |
1070 | qdio_establish_handle_irq(cdev, cstat, dstat); | |
1071 | break; | |
779e6e1c JG |
1072 | case QDIO_IRQ_STATE_CLEANUP: |
1073 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1074 | break; | |
779e6e1c JG |
1075 | case QDIO_IRQ_STATE_ESTABLISHED: |
1076 | case QDIO_IRQ_STATE_ACTIVE: | |
1077 | if (cstat & SCHN_STAT_PCI) { | |
1078 | qdio_int_handler_pci(irq_ptr); | |
779e6e1c JG |
1079 | return; |
1080 | } | |
4c575423 | 1081 | if (cstat || dstat) |
779e6e1c JG |
1082 | qdio_handle_activate_check(cdev, intparm, cstat, |
1083 | dstat); | |
4c575423 | 1084 | break; |
959153d3 JG |
1085 | case QDIO_IRQ_STATE_STOPPED: |
1086 | break; | |
779e6e1c | 1087 | default: |
ce1d8014 | 1088 | WARN_ON_ONCE(1); |
779e6e1c JG |
1089 | } |
1090 | wake_up(&cdev->private->wait_q); | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * qdio_get_ssqd_desc - get qdio subchannel description | |
1095 | * @cdev: ccw device to get description for | |
bbd50e17 | 1096 | * @data: where to store the ssqd |
779e6e1c | 1097 | * |
bbd50e17 JG |
1098 | * Returns 0 or an error code. The results of the chsc are stored in the |
1099 | * specified structure. | |
779e6e1c | 1100 | */ |
bbd50e17 JG |
1101 | int qdio_get_ssqd_desc(struct ccw_device *cdev, |
1102 | struct qdio_ssqd_desc *data) | |
779e6e1c | 1103 | { |
9080c924 | 1104 | struct subchannel_id schid; |
779e6e1c | 1105 | |
bbd50e17 JG |
1106 | if (!cdev || !cdev->private) |
1107 | return -EINVAL; | |
1108 | ||
9080c924 SO |
1109 | ccw_device_get_schid(cdev, &schid); |
1110 | DBF_EVENT("get ssqd:%4x", schid.sch_no); | |
1111 | return qdio_setup_get_ssqd(NULL, &schid, data); | |
779e6e1c JG |
1112 | } |
1113 | EXPORT_SYMBOL_GPL(qdio_get_ssqd_desc); | |
1114 | ||
779e6e1c JG |
1115 | static void qdio_shutdown_queues(struct ccw_device *cdev) |
1116 | { | |
1117 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
1118 | struct qdio_q *q; | |
1119 | int i; | |
1120 | ||
1121 | for_each_input_queue(irq_ptr, q, i) | |
c38f9608 | 1122 | tasklet_kill(&q->tasklet); |
779e6e1c JG |
1123 | |
1124 | for_each_output_queue(irq_ptr, q, i) { | |
9bce8b2c | 1125 | del_timer_sync(&q->u.out.timer); |
c38f9608 | 1126 | tasklet_kill(&q->tasklet); |
779e6e1c JG |
1127 | } |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * qdio_shutdown - shut down a qdio subchannel | |
1132 | * @cdev: associated ccw device | |
1133 | * @how: use halt or clear to shutdown | |
1134 | */ | |
1135 | int qdio_shutdown(struct ccw_device *cdev, int how) | |
1136 | { | |
22f99347 | 1137 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
9080c924 | 1138 | struct subchannel_id schid; |
779e6e1c | 1139 | int rc; |
779e6e1c | 1140 | |
779e6e1c JG |
1141 | if (!irq_ptr) |
1142 | return -ENODEV; | |
1143 | ||
ce1d8014 | 1144 | WARN_ON_ONCE(irqs_disabled()); |
9080c924 SO |
1145 | ccw_device_get_schid(cdev, &schid); |
1146 | DBF_EVENT("qshutdown:%4x", schid.sch_no); | |
22f99347 | 1147 | |
779e6e1c JG |
1148 | mutex_lock(&irq_ptr->setup_mutex); |
1149 | /* | |
1150 | * Subchannel was already shot down. We cannot prevent being called | |
1151 | * twice since cio may trigger a shutdown asynchronously. | |
1152 | */ | |
1153 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { | |
1154 | mutex_unlock(&irq_ptr->setup_mutex); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
c38f9608 JG |
1158 | /* |
1159 | * Indicate that the device is going down. Scheduling the queue | |
1160 | * tasklets is forbidden from here on. | |
1161 | */ | |
1162 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED); | |
1163 | ||
779e6e1c JG |
1164 | tiqdio_remove_input_queues(irq_ptr); |
1165 | qdio_shutdown_queues(cdev); | |
aa2383f8 | 1166 | qdio_shutdown_debug_entries(irq_ptr); |
779e6e1c JG |
1167 | |
1168 | /* cleanup subchannel */ | |
a48ed867 | 1169 | spin_lock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1170 | |
1171 | if (how & QDIO_FLAG_CLEANUP_USING_CLEAR) | |
1172 | rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP); | |
1173 | else | |
1174 | /* default behaviour is halt */ | |
1175 | rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP); | |
1176 | if (rc) { | |
22f99347 JG |
1177 | DBF_ERROR("%4x SHUTD ERR", irq_ptr->schid.sch_no); |
1178 | DBF_ERROR("rc:%4d", rc); | |
779e6e1c JG |
1179 | goto no_cleanup; |
1180 | } | |
1181 | ||
1182 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP); | |
a48ed867 | 1183 | spin_unlock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1184 | wait_event_interruptible_timeout(cdev->private->wait_q, |
1185 | irq_ptr->state == QDIO_IRQ_STATE_INACTIVE || | |
1186 | irq_ptr->state == QDIO_IRQ_STATE_ERR, | |
1187 | 10 * HZ); | |
a48ed867 | 1188 | spin_lock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1189 | |
1190 | no_cleanup: | |
1191 | qdio_shutdown_thinint(irq_ptr); | |
1192 | ||
1193 | /* restore interrupt handler */ | |
89286320 | 1194 | if ((void *)cdev->handler == (void *)qdio_int_handler) { |
779e6e1c | 1195 | cdev->handler = irq_ptr->orig_handler; |
89286320 JW |
1196 | cdev->private->intparm = 0; |
1197 | } | |
a48ed867 | 1198 | spin_unlock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1199 | |
1200 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1201 | mutex_unlock(&irq_ptr->setup_mutex); | |
779e6e1c JG |
1202 | if (rc) |
1203 | return rc; | |
1204 | return 0; | |
1205 | } | |
1206 | EXPORT_SYMBOL_GPL(qdio_shutdown); | |
1207 | ||
1208 | /** | |
1209 | * qdio_free - free data structures for a qdio subchannel | |
1210 | * @cdev: associated ccw device | |
1211 | */ | |
1212 | int qdio_free(struct ccw_device *cdev) | |
1213 | { | |
22f99347 | 1214 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
9080c924 | 1215 | struct subchannel_id schid; |
58eb27cd | 1216 | |
779e6e1c JG |
1217 | if (!irq_ptr) |
1218 | return -ENODEV; | |
1219 | ||
9080c924 SO |
1220 | ccw_device_get_schid(cdev, &schid); |
1221 | DBF_EVENT("qfree:%4x", schid.sch_no); | |
613c4e04 | 1222 | DBF_DEV_EVENT(DBF_ERR, irq_ptr, "dbf abandoned"); |
779e6e1c | 1223 | mutex_lock(&irq_ptr->setup_mutex); |
22f99347 | 1224 | |
613c4e04 | 1225 | irq_ptr->debug_area = NULL; |
779e6e1c JG |
1226 | cdev->private->qdio_data = NULL; |
1227 | mutex_unlock(&irq_ptr->setup_mutex); | |
1228 | ||
1229 | qdio_release_memory(irq_ptr); | |
1230 | return 0; | |
1231 | } | |
1232 | EXPORT_SYMBOL_GPL(qdio_free); | |
1233 | ||
779e6e1c JG |
1234 | /** |
1235 | * qdio_allocate - allocate qdio queues and associated data | |
1236 | * @init_data: initialization data | |
1237 | */ | |
1238 | int qdio_allocate(struct qdio_initialize *init_data) | |
1239 | { | |
9080c924 | 1240 | struct subchannel_id schid; |
779e6e1c | 1241 | struct qdio_irq *irq_ptr; |
779e6e1c | 1242 | |
9080c924 SO |
1243 | ccw_device_get_schid(init_data->cdev, &schid); |
1244 | DBF_EVENT("qallocate:%4x", schid.sch_no); | |
779e6e1c JG |
1245 | |
1246 | if ((init_data->no_input_qs && !init_data->input_handler) || | |
1247 | (init_data->no_output_qs && !init_data->output_handler)) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | if ((init_data->no_input_qs > QDIO_MAX_QUEUES_PER_IRQ) || | |
1251 | (init_data->no_output_qs > QDIO_MAX_QUEUES_PER_IRQ)) | |
1252 | return -EINVAL; | |
1253 | ||
1254 | if ((!init_data->input_sbal_addr_array) || | |
1255 | (!init_data->output_sbal_addr_array)) | |
1256 | return -EINVAL; | |
1257 | ||
779e6e1c JG |
1258 | /* irq_ptr must be in GFP_DMA since it contains ccw1.cda */ |
1259 | irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA); | |
1260 | if (!irq_ptr) | |
1261 | goto out_err; | |
779e6e1c JG |
1262 | |
1263 | mutex_init(&irq_ptr->setup_mutex); | |
613c4e04 SR |
1264 | if (qdio_allocate_dbf(init_data, irq_ptr)) |
1265 | goto out_rel; | |
779e6e1c JG |
1266 | |
1267 | /* | |
1268 | * Allocate a page for the chsc calls in qdio_establish. | |
1269 | * Must be pre-allocated since a zfcp recovery will call | |
1270 | * qdio_establish. In case of low memory and swap on a zfcp disk | |
1271 | * we may not be able to allocate memory otherwise. | |
1272 | */ | |
1273 | irq_ptr->chsc_page = get_zeroed_page(GFP_KERNEL); | |
1274 | if (!irq_ptr->chsc_page) | |
1275 | goto out_rel; | |
1276 | ||
1277 | /* qdr is used in ccw1.cda which is u32 */ | |
3b8e3004 | 1278 | irq_ptr->qdr = (struct qdr *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
779e6e1c JG |
1279 | if (!irq_ptr->qdr) |
1280 | goto out_rel; | |
779e6e1c | 1281 | |
779e6e1c JG |
1282 | if (qdio_allocate_qs(irq_ptr, init_data->no_input_qs, |
1283 | init_data->no_output_qs)) | |
1284 | goto out_rel; | |
1285 | ||
1286 | init_data->cdev->private->qdio_data = irq_ptr; | |
1287 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE); | |
1288 | return 0; | |
1289 | out_rel: | |
1290 | qdio_release_memory(irq_ptr); | |
1291 | out_err: | |
1292 | return -ENOMEM; | |
1293 | } | |
1294 | EXPORT_SYMBOL_GPL(qdio_allocate); | |
1295 | ||
104ea556 | 1296 | static void qdio_detect_hsicq(struct qdio_irq *irq_ptr) |
1297 | { | |
1298 | struct qdio_q *q = irq_ptr->input_qs[0]; | |
1299 | int i, use_cq = 0; | |
1300 | ||
1301 | if (irq_ptr->nr_input_qs > 1 && queue_type(q) == QDIO_IQDIO_QFMT) | |
1302 | use_cq = 1; | |
1303 | ||
1304 | for_each_output_queue(irq_ptr, q, i) { | |
1305 | if (use_cq) { | |
69e96207 JW |
1306 | if (multicast_outbound(q)) |
1307 | continue; | |
104ea556 | 1308 | if (qdio_enable_async_operation(&q->u.out) < 0) { |
1309 | use_cq = 0; | |
1310 | continue; | |
1311 | } | |
1312 | } else | |
1313 | qdio_disable_async_operation(&q->u.out); | |
1314 | } | |
1315 | DBF_EVENT("use_cq:%d", use_cq); | |
1316 | } | |
1317 | ||
779e6e1c JG |
1318 | /** |
1319 | * qdio_establish - establish queues on a qdio subchannel | |
1320 | * @init_data: initialization data | |
1321 | */ | |
1322 | int qdio_establish(struct qdio_initialize *init_data) | |
1323 | { | |
779e6e1c | 1324 | struct ccw_device *cdev = init_data->cdev; |
9080c924 SO |
1325 | struct subchannel_id schid; |
1326 | struct qdio_irq *irq_ptr; | |
779e6e1c JG |
1327 | int rc; |
1328 | ||
9080c924 SO |
1329 | ccw_device_get_schid(cdev, &schid); |
1330 | DBF_EVENT("qestablish:%4x", schid.sch_no); | |
58eb27cd | 1331 | |
779e6e1c JG |
1332 | irq_ptr = cdev->private->qdio_data; |
1333 | if (!irq_ptr) | |
1334 | return -ENODEV; | |
1335 | ||
779e6e1c JG |
1336 | mutex_lock(&irq_ptr->setup_mutex); |
1337 | qdio_setup_irq(init_data); | |
1338 | ||
1339 | rc = qdio_establish_thinint(irq_ptr); | |
1340 | if (rc) { | |
1341 | mutex_unlock(&irq_ptr->setup_mutex); | |
1342 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1343 | return rc; | |
1344 | } | |
1345 | ||
1346 | /* establish q */ | |
1347 | irq_ptr->ccw.cmd_code = irq_ptr->equeue.cmd; | |
1348 | irq_ptr->ccw.flags = CCW_FLAG_SLI; | |
1349 | irq_ptr->ccw.count = irq_ptr->equeue.count; | |
1350 | irq_ptr->ccw.cda = (u32)((addr_t)irq_ptr->qdr); | |
1351 | ||
a48ed867 | 1352 | spin_lock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1353 | ccw_device_set_options_mask(cdev, 0); |
1354 | ||
1355 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ESTABLISH, 0, 0); | |
ddebf661 | 1356 | spin_unlock_irq(get_ccwdev_lock(cdev)); |
779e6e1c | 1357 | if (rc) { |
22f99347 JG |
1358 | DBF_ERROR("%4x est IO ERR", irq_ptr->schid.sch_no); |
1359 | DBF_ERROR("rc:%4x", rc); | |
779e6e1c JG |
1360 | mutex_unlock(&irq_ptr->setup_mutex); |
1361 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1362 | return rc; | |
1363 | } | |
1364 | ||
1365 | wait_event_interruptible_timeout(cdev->private->wait_q, | |
1366 | irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED || | |
1367 | irq_ptr->state == QDIO_IRQ_STATE_ERR, HZ); | |
1368 | ||
1369 | if (irq_ptr->state != QDIO_IRQ_STATE_ESTABLISHED) { | |
1370 | mutex_unlock(&irq_ptr->setup_mutex); | |
1371 | qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR); | |
1372 | return -EIO; | |
1373 | } | |
1374 | ||
1375 | qdio_setup_ssqd_info(irq_ptr); | |
779e6e1c | 1376 | |
104ea556 | 1377 | qdio_detect_hsicq(irq_ptr); |
1378 | ||
779e6e1c JG |
1379 | /* qebsm is now setup if available, initialize buffer states */ |
1380 | qdio_init_buf_states(irq_ptr); | |
1381 | ||
1382 | mutex_unlock(&irq_ptr->setup_mutex); | |
1383 | qdio_print_subchannel_info(irq_ptr, cdev); | |
1384 | qdio_setup_debug_entries(irq_ptr, cdev); | |
1385 | return 0; | |
1386 | } | |
1387 | EXPORT_SYMBOL_GPL(qdio_establish); | |
1388 | ||
1389 | /** | |
1390 | * qdio_activate - activate queues on a qdio subchannel | |
1391 | * @cdev: associated cdev | |
1392 | */ | |
1393 | int qdio_activate(struct ccw_device *cdev) | |
1394 | { | |
9080c924 | 1395 | struct subchannel_id schid; |
779e6e1c JG |
1396 | struct qdio_irq *irq_ptr; |
1397 | int rc; | |
779e6e1c | 1398 | |
9080c924 SO |
1399 | ccw_device_get_schid(cdev, &schid); |
1400 | DBF_EVENT("qactivate:%4x", schid.sch_no); | |
58eb27cd | 1401 | |
779e6e1c JG |
1402 | irq_ptr = cdev->private->qdio_data; |
1403 | if (!irq_ptr) | |
1404 | return -ENODEV; | |
1405 | ||
779e6e1c JG |
1406 | mutex_lock(&irq_ptr->setup_mutex); |
1407 | if (irq_ptr->state == QDIO_IRQ_STATE_INACTIVE) { | |
1408 | rc = -EBUSY; | |
1409 | goto out; | |
1410 | } | |
1411 | ||
779e6e1c JG |
1412 | irq_ptr->ccw.cmd_code = irq_ptr->aqueue.cmd; |
1413 | irq_ptr->ccw.flags = CCW_FLAG_SLI; | |
1414 | irq_ptr->ccw.count = irq_ptr->aqueue.count; | |
1415 | irq_ptr->ccw.cda = 0; | |
1416 | ||
a48ed867 | 1417 | spin_lock_irq(get_ccwdev_lock(cdev)); |
779e6e1c JG |
1418 | ccw_device_set_options(cdev, CCWDEV_REPORT_ALL); |
1419 | ||
1420 | rc = ccw_device_start(cdev, &irq_ptr->ccw, QDIO_DOING_ACTIVATE, | |
1421 | 0, DOIO_DENY_PREFETCH); | |
ddebf661 | 1422 | spin_unlock_irq(get_ccwdev_lock(cdev)); |
779e6e1c | 1423 | if (rc) { |
22f99347 JG |
1424 | DBF_ERROR("%4x act IO ERR", irq_ptr->schid.sch_no); |
1425 | DBF_ERROR("rc:%4x", rc); | |
779e6e1c | 1426 | goto out; |
ddebf661 | 1427 | } |
779e6e1c JG |
1428 | |
1429 | if (is_thinint_irq(irq_ptr)) | |
1430 | tiqdio_add_input_queues(irq_ptr); | |
1431 | ||
1432 | /* wait for subchannel to become active */ | |
1433 | msleep(5); | |
1434 | ||
1435 | switch (irq_ptr->state) { | |
1436 | case QDIO_IRQ_STATE_STOPPED: | |
1437 | case QDIO_IRQ_STATE_ERR: | |
e4c14e20 JG |
1438 | rc = -EIO; |
1439 | break; | |
779e6e1c JG |
1440 | default: |
1441 | qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE); | |
1442 | rc = 0; | |
1443 | } | |
1444 | out: | |
1445 | mutex_unlock(&irq_ptr->setup_mutex); | |
1446 | return rc; | |
1447 | } | |
1448 | EXPORT_SYMBOL_GPL(qdio_activate); | |
1449 | ||
1450 | static inline int buf_in_between(int bufnr, int start, int count) | |
1451 | { | |
1452 | int end = add_buf(start, count); | |
1453 | ||
1454 | if (end > start) { | |
1455 | if (bufnr >= start && bufnr < end) | |
1456 | return 1; | |
1457 | else | |
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | /* wrap-around case */ | |
1462 | if ((bufnr >= start && bufnr <= QDIO_MAX_BUFFERS_PER_Q) || | |
1463 | (bufnr < end)) | |
1464 | return 1; | |
1465 | else | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | /** | |
1470 | * handle_inbound - reset processed input buffers | |
1471 | * @q: queue containing the buffers | |
1472 | * @callflags: flags | |
1473 | * @bufnr: first buffer to process | |
1474 | * @count: how many buffers are emptied | |
1475 | */ | |
d303b6fd JG |
1476 | static int handle_inbound(struct qdio_q *q, unsigned int callflags, |
1477 | int bufnr, int count) | |
779e6e1c | 1478 | { |
dae7fd42 | 1479 | int diff; |
779e6e1c | 1480 | |
6486cda6 JG |
1481 | qperf_inc(q, inbound_call); |
1482 | ||
50f769df JG |
1483 | if (!q->u.in.polling) |
1484 | goto set; | |
1485 | ||
1486 | /* protect against stop polling setting an ACK for an emptied slsb */ | |
1487 | if (count == QDIO_MAX_BUFFERS_PER_Q) { | |
1488 | /* overwriting everything, just delete polling status */ | |
1489 | q->u.in.polling = 0; | |
1490 | q->u.in.ack_count = 0; | |
1491 | goto set; | |
e85dea0e | 1492 | } else if (buf_in_between(q->u.in.ack_start, bufnr, count)) { |
50f769df | 1493 | if (is_qebsm(q)) { |
e85dea0e | 1494 | /* partial overwrite, just update ack_start */ |
50f769df | 1495 | diff = add_buf(bufnr, count); |
e85dea0e | 1496 | diff = sub_buf(diff, q->u.in.ack_start); |
50f769df JG |
1497 | q->u.in.ack_count -= diff; |
1498 | if (q->u.in.ack_count <= 0) { | |
1499 | q->u.in.polling = 0; | |
1500 | q->u.in.ack_count = 0; | |
50f769df JG |
1501 | goto set; |
1502 | } | |
e85dea0e | 1503 | q->u.in.ack_start = add_buf(q->u.in.ack_start, diff); |
50f769df JG |
1504 | } |
1505 | else | |
1506 | /* the only ACK will be deleted, so stop polling */ | |
779e6e1c | 1507 | q->u.in.polling = 0; |
50f769df | 1508 | } |
779e6e1c | 1509 | |
50f769df | 1510 | set: |
779e6e1c | 1511 | count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count); |
dae7fd42 | 1512 | atomic_add(count, &q->nr_buf_used); |
779e6e1c | 1513 | |
d303b6fd JG |
1514 | if (need_siga_in(q)) |
1515 | return qdio_siga_input(q); | |
9cb7284f | 1516 | |
d303b6fd | 1517 | return 0; |
779e6e1c JG |
1518 | } |
1519 | ||
1520 | /** | |
1521 | * handle_outbound - process filled outbound buffers | |
1522 | * @q: queue containing the buffers | |
1523 | * @callflags: flags | |
1524 | * @bufnr: first buffer to process | |
1525 | * @count: how many buffers are filled | |
1526 | */ | |
d303b6fd JG |
1527 | static int handle_outbound(struct qdio_q *q, unsigned int callflags, |
1528 | int bufnr, int count) | |
779e6e1c | 1529 | { |
c26001d4 | 1530 | unsigned char state = 0; |
d303b6fd | 1531 | int used, rc = 0; |
779e6e1c | 1532 | |
6486cda6 | 1533 | qperf_inc(q, outbound_call); |
779e6e1c JG |
1534 | |
1535 | count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count); | |
1536 | used = atomic_add_return(count, &q->nr_buf_used); | |
779e6e1c | 1537 | |
0195843b JG |
1538 | if (used == QDIO_MAX_BUFFERS_PER_Q) |
1539 | qperf_inc(q, outbound_queue_full); | |
1540 | ||
6486cda6 | 1541 | if (callflags & QDIO_FLAG_PCI_OUT) { |
779e6e1c | 1542 | q->u.out.pci_out_enabled = 1; |
6486cda6 | 1543 | qperf_inc(q, pci_request_int); |
110da317 | 1544 | } else |
779e6e1c JG |
1545 | q->u.out.pci_out_enabled = 0; |
1546 | ||
1547 | if (queue_type(q) == QDIO_IQDIO_QFMT) { | |
104ea556 | 1548 | unsigned long phys_aob = 0; |
1549 | ||
1550 | /* One SIGA-W per buffer required for unicast HSI */ | |
110da317 JG |
1551 | WARN_ON_ONCE(count > 1 && !multicast_outbound(q)); |
1552 | ||
69e96207 JW |
1553 | if (q->u.out.use_cq) |
1554 | phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr); | |
104ea556 | 1555 | |
1556 | rc = qdio_kick_outbound_q(q, phys_aob); | |
90adac58 | 1557 | } else if (need_siga_sync(q)) { |
110da317 | 1558 | rc = qdio_siga_sync_q(q); |
a6ec414a JW |
1559 | } else if (count < QDIO_MAX_BUFFERS_PER_Q && |
1560 | get_buf_state(q, prev_buf(bufnr), &state, 0) > 0 && | |
1561 | state == SLSB_CU_OUTPUT_PRIMED) { | |
1562 | /* The previous buffer is not processed yet, tack on. */ | |
1563 | qperf_inc(q, fast_requeue); | |
110da317 | 1564 | } else { |
a6ec414a | 1565 | rc = qdio_kick_outbound_q(q, 0); |
779e6e1c JG |
1566 | } |
1567 | ||
3d6c76ff JG |
1568 | /* in case of SIGA errors we must process the error immediately */ |
1569 | if (used >= q->u.out.scan_threshold || rc) | |
9bce8b2c | 1570 | qdio_tasklet_schedule(q); |
3d6c76ff JG |
1571 | else |
1572 | /* free the SBALs in case of no further traffic */ | |
9bce8b2c UB |
1573 | if (!timer_pending(&q->u.out.timer) && |
1574 | likely(q->irq_ptr->state == QDIO_IRQ_STATE_ACTIVE)) | |
3d6c76ff | 1575 | mod_timer(&q->u.out.timer, jiffies + HZ); |
d303b6fd | 1576 | return rc; |
779e6e1c JG |
1577 | } |
1578 | ||
1579 | /** | |
1580 | * do_QDIO - process input or output buffers | |
1581 | * @cdev: associated ccw_device for the qdio subchannel | |
1582 | * @callflags: input or output and special flags from the program | |
1583 | * @q_nr: queue number | |
1584 | * @bufnr: buffer number | |
1585 | * @count: how many buffers to process | |
1586 | */ | |
1587 | int do_QDIO(struct ccw_device *cdev, unsigned int callflags, | |
6618241b | 1588 | int q_nr, unsigned int bufnr, unsigned int count) |
779e6e1c JG |
1589 | { |
1590 | struct qdio_irq *irq_ptr; | |
779e6e1c | 1591 | |
6618241b | 1592 | if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q) |
779e6e1c JG |
1593 | return -EINVAL; |
1594 | ||
779e6e1c JG |
1595 | irq_ptr = cdev->private->qdio_data; |
1596 | if (!irq_ptr) | |
1597 | return -ENODEV; | |
1598 | ||
1d7e1500 JG |
1599 | DBF_DEV_EVENT(DBF_INFO, irq_ptr, |
1600 | "do%02x b:%02x c:%02x", callflags, bufnr, count); | |
779e6e1c JG |
1601 | |
1602 | if (irq_ptr->state != QDIO_IRQ_STATE_ACTIVE) | |
1549d13f | 1603 | return -EIO; |
9a26513e JG |
1604 | if (!count) |
1605 | return 0; | |
779e6e1c | 1606 | if (callflags & QDIO_FLAG_SYNC_INPUT) |
d303b6fd JG |
1607 | return handle_inbound(irq_ptr->input_qs[q_nr], |
1608 | callflags, bufnr, count); | |
779e6e1c | 1609 | else if (callflags & QDIO_FLAG_SYNC_OUTPUT) |
d303b6fd JG |
1610 | return handle_outbound(irq_ptr->output_qs[q_nr], |
1611 | callflags, bufnr, count); | |
1612 | return -EINVAL; | |
779e6e1c JG |
1613 | } |
1614 | EXPORT_SYMBOL_GPL(do_QDIO); | |
1615 | ||
d36deae7 JG |
1616 | /** |
1617 | * qdio_start_irq - process input buffers | |
1618 | * @cdev: associated ccw_device for the qdio subchannel | |
1619 | * @nr: input queue number | |
1620 | * | |
1621 | * Return codes | |
1622 | * 0 - success | |
1623 | * 1 - irqs not started since new data is available | |
1624 | */ | |
1625 | int qdio_start_irq(struct ccw_device *cdev, int nr) | |
1626 | { | |
1627 | struct qdio_q *q; | |
1628 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
1629 | ||
1630 | if (!irq_ptr) | |
1631 | return -ENODEV; | |
1632 | q = irq_ptr->input_qs[nr]; | |
1633 | ||
5f4026f8 | 1634 | clear_nonshared_ind(irq_ptr); |
d36deae7 JG |
1635 | qdio_stop_polling(q); |
1636 | clear_bit(QDIO_QUEUE_IRQS_DISABLED, &q->u.in.queue_irq_state); | |
1637 | ||
1638 | /* | |
1639 | * We need to check again to not lose initiative after | |
1640 | * resetting the ACK state. | |
1641 | */ | |
5f4026f8 | 1642 | if (test_nonshared_ind(irq_ptr)) |
d36deae7 | 1643 | goto rescan; |
6bcf74e2 | 1644 | if (!qdio_inbound_q_done(q, q->first_to_check)) |
d36deae7 JG |
1645 | goto rescan; |
1646 | return 0; | |
1647 | ||
1648 | rescan: | |
1649 | if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED, | |
1650 | &q->u.in.queue_irq_state)) | |
1651 | return 0; | |
1652 | else | |
1653 | return 1; | |
1654 | ||
1655 | } | |
1656 | EXPORT_SYMBOL(qdio_start_irq); | |
1657 | ||
1658 | /** | |
1659 | * qdio_get_next_buffers - process input buffers | |
1660 | * @cdev: associated ccw_device for the qdio subchannel | |
1661 | * @nr: input queue number | |
1662 | * @bufnr: first filled buffer number | |
1663 | * @error: buffers are in error state | |
1664 | * | |
1665 | * Return codes | |
1666 | * < 0 - error | |
1667 | * = 0 - no new buffers found | |
1668 | * > 0 - number of processed buffers | |
1669 | */ | |
1670 | int qdio_get_next_buffers(struct ccw_device *cdev, int nr, int *bufnr, | |
1671 | int *error) | |
1672 | { | |
1673 | struct qdio_q *q; | |
d36deae7 | 1674 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; |
6bcf74e2 | 1675 | unsigned int start; |
b39544c6 | 1676 | int count; |
d36deae7 JG |
1677 | |
1678 | if (!irq_ptr) | |
1679 | return -ENODEV; | |
1680 | q = irq_ptr->input_qs[nr]; | |
6bcf74e2 | 1681 | start = q->first_to_check; |
d36deae7 | 1682 | |
d36deae7 | 1683 | /* |
90adac58 JG |
1684 | * Cannot rely on automatic sync after interrupt since queues may |
1685 | * also be examined without interrupt. | |
d36deae7 | 1686 | */ |
90adac58 JG |
1687 | if (need_siga_sync(q)) |
1688 | qdio_sync_queues(q); | |
1689 | ||
2f2f3839 | 1690 | qdio_check_outbound_pci_queues(irq_ptr); |
d36deae7 | 1691 | |
6bcf74e2 | 1692 | count = qdio_inbound_q_moved(q, start); |
b39544c6 | 1693 | if (count == 0) |
d36deae7 JG |
1694 | return 0; |
1695 | ||
6bcf74e2 JW |
1696 | start = add_buf(start, count); |
1697 | q->first_to_check = start; | |
1698 | ||
d36deae7 JG |
1699 | /* Note: upper-layer MUST stop processing immediately here ... */ |
1700 | if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE)) | |
1701 | return -EIO; | |
1702 | ||
65e4f776 | 1703 | *bufnr = q->first_to_kick; |
d36deae7 JG |
1704 | *error = q->qdio_error; |
1705 | ||
1706 | /* for the next time */ | |
65e4f776 | 1707 | q->first_to_kick = add_buf(q->first_to_kick, count); |
d36deae7 | 1708 | q->qdio_error = 0; |
65e4f776 JW |
1709 | |
1710 | return count; | |
d36deae7 JG |
1711 | } |
1712 | EXPORT_SYMBOL(qdio_get_next_buffers); | |
1713 | ||
1714 | /** | |
1715 | * qdio_stop_irq - disable interrupt processing for the device | |
1716 | * @cdev: associated ccw_device for the qdio subchannel | |
1717 | * @nr: input queue number | |
1718 | * | |
1719 | * Return codes | |
1720 | * 0 - interrupts were already disabled | |
1721 | * 1 - interrupts successfully disabled | |
1722 | */ | |
1723 | int qdio_stop_irq(struct ccw_device *cdev, int nr) | |
1724 | { | |
1725 | struct qdio_q *q; | |
1726 | struct qdio_irq *irq_ptr = cdev->private->qdio_data; | |
1727 | ||
1728 | if (!irq_ptr) | |
1729 | return -ENODEV; | |
1730 | q = irq_ptr->input_qs[nr]; | |
1731 | ||
1732 | if (test_and_set_bit(QDIO_QUEUE_IRQS_DISABLED, | |
1733 | &q->u.in.queue_irq_state)) | |
1734 | return 0; | |
1735 | else | |
1736 | return 1; | |
1737 | } | |
1738 | EXPORT_SYMBOL(qdio_stop_irq); | |
1739 | ||
1c59a861 EC |
1740 | /** |
1741 | * qdio_pnso_brinfo() - perform network subchannel op #0 - bridge info. | |
1742 | * @schid: Subchannel ID. | |
1743 | * @cnc: Boolean Change-Notification Control | |
1744 | * @response: Response code will be stored at this address | |
1745 | * @cb: Callback function will be executed for each element | |
1746 | * of the address list | |
1c59a861 EC |
1747 | * @priv: Pointer to pass to the callback function. |
1748 | * | |
1749 | * Performs "Store-network-bridging-information list" operation and calls | |
1750 | * the callback function for every entry in the list. If "change- | |
1751 | * notification-control" is set, further changes in the address list | |
1752 | * will be reported via the IPA command. | |
1753 | */ | |
1754 | int qdio_pnso_brinfo(struct subchannel_id schid, | |
1755 | int cnc, u16 *response, | |
1756 | void (*cb)(void *priv, enum qdio_brinfo_entry_type type, | |
1757 | void *entry), | |
1758 | void *priv) | |
1759 | { | |
1760 | struct chsc_pnso_area *rr; | |
1761 | int rc; | |
1762 | u32 prev_instance = 0; | |
1763 | int isfirstblock = 1; | |
1764 | int i, size, elems; | |
1765 | ||
1766 | rr = (struct chsc_pnso_area *)get_zeroed_page(GFP_KERNEL); | |
1767 | if (rr == NULL) | |
1768 | return -ENOMEM; | |
1769 | do { | |
1770 | /* on the first iteration, naihdr.resume_token will be zero */ | |
1771 | rc = chsc_pnso_brinfo(schid, rr, rr->naihdr.resume_token, cnc); | |
1772 | if (rc != 0 && rc != -EBUSY) | |
1773 | goto out; | |
1774 | if (rr->response.code != 1) { | |
1775 | rc = -EIO; | |
1776 | continue; | |
1777 | } else | |
1778 | rc = 0; | |
1779 | ||
1780 | if (cb == NULL) | |
1781 | continue; | |
1782 | ||
1783 | size = rr->naihdr.naids; | |
1784 | elems = (rr->response.length - | |
1785 | sizeof(struct chsc_header) - | |
1786 | sizeof(struct chsc_brinfo_naihdr)) / | |
1787 | size; | |
1788 | ||
1789 | if (!isfirstblock && (rr->naihdr.instance != prev_instance)) { | |
1790 | /* Inform the caller that they need to scrap */ | |
1791 | /* the data that was already reported via cb */ | |
1792 | rc = -EAGAIN; | |
1793 | break; | |
1794 | } | |
1795 | isfirstblock = 0; | |
1796 | prev_instance = rr->naihdr.instance; | |
1797 | for (i = 0; i < elems; i++) | |
1798 | switch (size) { | |
1799 | case sizeof(struct qdio_brinfo_entry_l3_ipv6): | |
1800 | (*cb)(priv, l3_ipv6_addr, | |
1801 | &rr->entries.l3_ipv6[i]); | |
1802 | break; | |
1803 | case sizeof(struct qdio_brinfo_entry_l3_ipv4): | |
1804 | (*cb)(priv, l3_ipv4_addr, | |
1805 | &rr->entries.l3_ipv4[i]); | |
1806 | break; | |
1807 | case sizeof(struct qdio_brinfo_entry_l2): | |
1808 | (*cb)(priv, l2_addr_lnid, | |
1809 | &rr->entries.l2[i]); | |
1810 | break; | |
1811 | default: | |
1812 | WARN_ON_ONCE(1); | |
1813 | rc = -EIO; | |
1814 | goto out; | |
1815 | } | |
1816 | } while (rr->response.code == 0x0107 || /* channel busy */ | |
1817 | (rr->response.code == 1 && /* list stored */ | |
1818 | /* resume token is non-zero => list incomplete */ | |
1819 | (rr->naihdr.resume_token.t1 || rr->naihdr.resume_token.t2))); | |
1820 | (*response) = rr->response.code; | |
1821 | ||
1822 | out: | |
1823 | free_page((unsigned long)rr); | |
1824 | return rc; | |
1825 | } | |
1826 | EXPORT_SYMBOL_GPL(qdio_pnso_brinfo); | |
1827 | ||
779e6e1c JG |
1828 | static int __init init_QDIO(void) |
1829 | { | |
1830 | int rc; | |
1831 | ||
aa5c8df3 | 1832 | rc = qdio_debug_init(); |
779e6e1c JG |
1833 | if (rc) |
1834 | return rc; | |
aa5c8df3 SO |
1835 | rc = qdio_setup_init(); |
1836 | if (rc) | |
1837 | goto out_debug; | |
779e6e1c JG |
1838 | rc = tiqdio_allocate_memory(); |
1839 | if (rc) | |
1840 | goto out_cache; | |
779e6e1c JG |
1841 | rc = tiqdio_register_thinints(); |
1842 | if (rc) | |
aa5c8df3 | 1843 | goto out_ti; |
779e6e1c JG |
1844 | return 0; |
1845 | ||
779e6e1c JG |
1846 | out_ti: |
1847 | tiqdio_free_memory(); | |
1848 | out_cache: | |
1849 | qdio_setup_exit(); | |
aa5c8df3 SO |
1850 | out_debug: |
1851 | qdio_debug_exit(); | |
779e6e1c JG |
1852 | return rc; |
1853 | } | |
1854 | ||
1855 | static void __exit exit_QDIO(void) | |
1856 | { | |
1857 | tiqdio_unregister_thinints(); | |
1858 | tiqdio_free_memory(); | |
779e6e1c | 1859 | qdio_setup_exit(); |
aa5c8df3 | 1860 | qdio_debug_exit(); |
779e6e1c JG |
1861 | } |
1862 | ||
1863 | module_init(init_QDIO); | |
1864 | module_exit(exit_QDIO); |