1 /* 2 * qdio queue initialization 3 * 4 * Copyright IBM Corp. 2008 5 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com> 6 */ 7 #include <linux/kernel.h> 8 #include <linux/slab.h> 9 #include <linux/export.h> 10 #include <asm/qdio.h> 11 12 #include "cio.h" 13 #include "css.h" 14 #include "device.h" 15 #include "ioasm.h" 16 #include "chsc.h" 17 #include "qdio.h" 18 #include "qdio_debug.h" 19 20 static struct kmem_cache *qdio_q_cache; 21 static struct kmem_cache *qdio_aob_cache; 22 23 struct qaob *qdio_allocate_aob(void) 24 { 25 return kmem_cache_zalloc(qdio_aob_cache, GFP_ATOMIC); 26 } 27 EXPORT_SYMBOL_GPL(qdio_allocate_aob); 28 29 void qdio_release_aob(struct qaob *aob) 30 { 31 kmem_cache_free(qdio_aob_cache, aob); 32 } 33 EXPORT_SYMBOL_GPL(qdio_release_aob); 34 35 /* 36 * qebsm is only available under 64bit but the adapter sets the feature 37 * flag anyway, so we manually override it. 38 */ 39 static inline int qebsm_possible(void) 40 { 41 #ifdef CONFIG_64BIT 42 return css_general_characteristics.qebsm; 43 #endif 44 return 0; 45 } 46 47 /* 48 * qib_param_field: pointer to 128 bytes or NULL, if no param field 49 * nr_input_qs: pointer to nr_queues*128 words of data or NULL 50 */ 51 static void set_impl_params(struct qdio_irq *irq_ptr, 52 unsigned int qib_param_field_format, 53 unsigned char *qib_param_field, 54 unsigned long *input_slib_elements, 55 unsigned long *output_slib_elements) 56 { 57 struct qdio_q *q; 58 int i, j; 59 60 if (!irq_ptr) 61 return; 62 63 irq_ptr->qib.pfmt = qib_param_field_format; 64 if (qib_param_field) 65 memcpy(irq_ptr->qib.parm, qib_param_field, 66 QDIO_MAX_BUFFERS_PER_Q); 67 68 if (!input_slib_elements) 69 goto output; 70 71 for_each_input_queue(irq_ptr, q, i) { 72 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 73 q->slib->slibe[j].parms = 74 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 75 } 76 output: 77 if (!output_slib_elements) 78 return; 79 80 for_each_output_queue(irq_ptr, q, i) { 81 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 82 q->slib->slibe[j].parms = 83 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 84 } 85 } 86 87 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues) 88 { 89 struct qdio_q *q; 90 int i; 91 92 for (i = 0; i < nr_queues; i++) { 93 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL); 94 if (!q) 95 return -ENOMEM; 96 97 q->slib = (struct slib *) __get_free_page(GFP_KERNEL); 98 if (!q->slib) { 99 kmem_cache_free(qdio_q_cache, q); 100 return -ENOMEM; 101 } 102 irq_ptr_qs[i] = q; 103 } 104 return 0; 105 } 106 107 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs) 108 { 109 int rc; 110 111 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs); 112 if (rc) 113 return rc; 114 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs); 115 return rc; 116 } 117 118 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr, 119 qdio_handler_t *handler, int i) 120 { 121 struct slib *slib = q->slib; 122 123 /* queue must be cleared for qdio_establish */ 124 memset(q, 0, sizeof(*q)); 125 memset(slib, 0, PAGE_SIZE); 126 q->slib = slib; 127 q->irq_ptr = irq_ptr; 128 q->mask = 1 << (31 - i); 129 q->nr = i; 130 q->handler = handler; 131 } 132 133 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr, 134 void **sbals_array, int i) 135 { 136 struct qdio_q *prev; 137 int j; 138 139 DBF_HEX(&q, sizeof(void *)); 140 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2); 141 142 /* fill in sbal */ 143 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 144 q->sbal[j] = *sbals_array++; 145 146 /* fill in slib */ 147 if (i > 0) { 148 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1] 149 : irq_ptr->output_qs[i - 1]; 150 prev->slib->nsliba = (unsigned long)q->slib; 151 } 152 153 q->slib->sla = (unsigned long)q->sl; 154 q->slib->slsba = (unsigned long)&q->slsb.val[0]; 155 156 /* fill in sl */ 157 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 158 q->sl->element[j].sbal = (unsigned long)q->sbal[j]; 159 } 160 161 static void setup_queues(struct qdio_irq *irq_ptr, 162 struct qdio_initialize *qdio_init) 163 { 164 struct qdio_q *q; 165 void **input_sbal_array = qdio_init->input_sbal_addr_array; 166 void **output_sbal_array = qdio_init->output_sbal_addr_array; 167 struct qdio_outbuf_state *output_sbal_state_array = 168 qdio_init->output_sbal_state_array; 169 int i; 170 171 for_each_input_queue(irq_ptr, q, i) { 172 DBF_EVENT("inq:%1d", i); 173 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i); 174 175 q->is_input_q = 1; 176 q->u.in.queue_start_poll = qdio_init->queue_start_poll_array ? 177 qdio_init->queue_start_poll_array[i] : NULL; 178 179 setup_storage_lists(q, irq_ptr, input_sbal_array, i); 180 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 181 182 if (is_thinint_irq(irq_ptr)) { 183 tasklet_init(&q->tasklet, tiqdio_inbound_processing, 184 (unsigned long) q); 185 } else { 186 tasklet_init(&q->tasklet, qdio_inbound_processing, 187 (unsigned long) q); 188 } 189 } 190 191 for_each_output_queue(irq_ptr, q, i) { 192 DBF_EVENT("outq:%1d", i); 193 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i); 194 195 q->u.out.sbal_state = output_sbal_state_array; 196 output_sbal_state_array += QDIO_MAX_BUFFERS_PER_Q; 197 198 q->is_input_q = 0; 199 q->u.out.scan_threshold = qdio_init->scan_threshold; 200 setup_storage_lists(q, irq_ptr, output_sbal_array, i); 201 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 202 203 tasklet_init(&q->tasklet, qdio_outbound_processing, 204 (unsigned long) q); 205 setup_timer(&q->u.out.timer, (void(*)(unsigned long)) 206 &qdio_outbound_timer, (unsigned long)q); 207 } 208 } 209 210 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac) 211 { 212 if (qdioac & AC1_SIGA_INPUT_NEEDED) 213 irq_ptr->siga_flag.input = 1; 214 if (qdioac & AC1_SIGA_OUTPUT_NEEDED) 215 irq_ptr->siga_flag.output = 1; 216 if (qdioac & AC1_SIGA_SYNC_NEEDED) 217 irq_ptr->siga_flag.sync = 1; 218 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_THININT)) 219 irq_ptr->siga_flag.sync_after_ai = 1; 220 if (!(qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI)) 221 irq_ptr->siga_flag.sync_out_after_pci = 1; 222 } 223 224 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr, 225 unsigned char qdioac, unsigned long token) 226 { 227 if (!(irq_ptr->qib.rflags & QIB_RFLAGS_ENABLE_QEBSM)) 228 goto no_qebsm; 229 if (!(qdioac & AC1_SC_QEBSM_AVAILABLE) || 230 (!(qdioac & AC1_SC_QEBSM_ENABLED))) 231 goto no_qebsm; 232 233 irq_ptr->sch_token = token; 234 235 DBF_EVENT("V=V:1"); 236 DBF_EVENT("%8lx", irq_ptr->sch_token); 237 return; 238 239 no_qebsm: 240 irq_ptr->sch_token = 0; 241 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; 242 DBF_EVENT("noV=V"); 243 } 244 245 /* 246 * If there is a qdio_irq we use the chsc_page and store the information 247 * in the qdio_irq, otherwise we copy it to the specified structure. 248 */ 249 int qdio_setup_get_ssqd(struct qdio_irq *irq_ptr, 250 struct subchannel_id *schid, 251 struct qdio_ssqd_desc *data) 252 { 253 struct chsc_ssqd_area *ssqd; 254 int rc; 255 256 DBF_EVENT("getssqd:%4x", schid->sch_no); 257 if (!irq_ptr) { 258 ssqd = (struct chsc_ssqd_area *)__get_free_page(GFP_KERNEL); 259 if (!ssqd) 260 return -ENOMEM; 261 } else { 262 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page; 263 } 264 265 rc = chsc_ssqd(*schid, ssqd); 266 if (rc) 267 goto out; 268 269 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) || 270 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) || 271 (ssqd->qdio_ssqd.sch != schid->sch_no)) 272 rc = -EINVAL; 273 274 if (!rc) 275 memcpy(data, &ssqd->qdio_ssqd, sizeof(*data)); 276 277 out: 278 if (!irq_ptr) 279 free_page((unsigned long)ssqd); 280 281 return rc; 282 } 283 284 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr) 285 { 286 unsigned char qdioac; 287 int rc; 288 289 rc = qdio_setup_get_ssqd(irq_ptr, &irq_ptr->schid, &irq_ptr->ssqd_desc); 290 if (rc) { 291 DBF_ERROR("%4x ssqd ERR", irq_ptr->schid.sch_no); 292 DBF_ERROR("rc:%x", rc); 293 /* all flags set, worst case */ 294 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED | 295 AC1_SIGA_SYNC_NEEDED; 296 } else 297 qdioac = irq_ptr->ssqd_desc.qdioac1; 298 299 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token); 300 process_ac_flags(irq_ptr, qdioac); 301 DBF_EVENT("ac 1:%2x 2:%4x", qdioac, irq_ptr->ssqd_desc.qdioac2); 302 DBF_EVENT("3:%4x qib:%4x", irq_ptr->ssqd_desc.qdioac3, irq_ptr->qib.ac); 303 } 304 305 void qdio_release_memory(struct qdio_irq *irq_ptr) 306 { 307 struct qdio_q *q; 308 int i; 309 310 /* 311 * Must check queue array manually since irq_ptr->nr_input_queues / 312 * irq_ptr->nr_input_queues may not yet be set. 313 */ 314 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) { 315 q = irq_ptr->input_qs[i]; 316 if (q) { 317 free_page((unsigned long) q->slib); 318 kmem_cache_free(qdio_q_cache, q); 319 } 320 } 321 for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) { 322 q = irq_ptr->output_qs[i]; 323 if (q) { 324 if (q->u.out.use_cq) { 325 int n; 326 327 for (n = 0; n < QDIO_MAX_BUFFERS_PER_Q; ++n) { 328 struct qaob *aob = q->u.out.aobs[n]; 329 if (aob) { 330 qdio_release_aob(aob); 331 q->u.out.aobs[n] = NULL; 332 } 333 } 334 335 qdio_disable_async_operation(&q->u.out); 336 } 337 free_page((unsigned long) q->slib); 338 kmem_cache_free(qdio_q_cache, q); 339 } 340 } 341 free_page((unsigned long) irq_ptr->qdr); 342 free_page(irq_ptr->chsc_page); 343 free_page((unsigned long) irq_ptr); 344 } 345 346 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr, 347 struct qdio_q **irq_ptr_qs, 348 int i, int nr) 349 { 350 irq_ptr->qdr->qdf0[i + nr].sliba = 351 (unsigned long)irq_ptr_qs[i]->slib; 352 353 irq_ptr->qdr->qdf0[i + nr].sla = 354 (unsigned long)irq_ptr_qs[i]->sl; 355 356 irq_ptr->qdr->qdf0[i + nr].slsba = 357 (unsigned long)&irq_ptr_qs[i]->slsb.val[0]; 358 359 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY >> 4; 360 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY >> 4; 361 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY >> 4; 362 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY >> 4; 363 } 364 365 static void setup_qdr(struct qdio_irq *irq_ptr, 366 struct qdio_initialize *qdio_init) 367 { 368 int i; 369 370 irq_ptr->qdr->qfmt = qdio_init->q_format; 371 irq_ptr->qdr->ac = qdio_init->qdr_ac; 372 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs; 373 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs; 374 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */ 375 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4; 376 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib; 377 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY >> 4; 378 379 for (i = 0; i < qdio_init->no_input_qs; i++) 380 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0); 381 382 for (i = 0; i < qdio_init->no_output_qs; i++) 383 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i, 384 qdio_init->no_input_qs); 385 } 386 387 static void setup_qib(struct qdio_irq *irq_ptr, 388 struct qdio_initialize *init_data) 389 { 390 if (qebsm_possible()) 391 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM; 392 393 irq_ptr->qib.rflags |= init_data->qib_rflags; 394 395 irq_ptr->qib.qfmt = init_data->q_format; 396 if (init_data->no_input_qs) 397 irq_ptr->qib.isliba = 398 (unsigned long)(irq_ptr->input_qs[0]->slib); 399 if (init_data->no_output_qs) 400 irq_ptr->qib.osliba = 401 (unsigned long)(irq_ptr->output_qs[0]->slib); 402 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8); 403 } 404 405 int qdio_setup_irq(struct qdio_initialize *init_data) 406 { 407 struct ciw *ciw; 408 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data; 409 int rc; 410 411 memset(&irq_ptr->qib, 0, sizeof(irq_ptr->qib)); 412 memset(&irq_ptr->siga_flag, 0, sizeof(irq_ptr->siga_flag)); 413 memset(&irq_ptr->ccw, 0, sizeof(irq_ptr->ccw)); 414 memset(&irq_ptr->ssqd_desc, 0, sizeof(irq_ptr->ssqd_desc)); 415 memset(&irq_ptr->perf_stat, 0, sizeof(irq_ptr->perf_stat)); 416 417 irq_ptr->debugfs_dev = irq_ptr->debugfs_perf = NULL; 418 irq_ptr->sch_token = irq_ptr->state = irq_ptr->perf_stat_enabled = 0; 419 420 /* wipes qib.ac, required by ar7063 */ 421 memset(irq_ptr->qdr, 0, sizeof(struct qdr)); 422 423 irq_ptr->int_parm = init_data->int_parm; 424 irq_ptr->nr_input_qs = init_data->no_input_qs; 425 irq_ptr->nr_output_qs = init_data->no_output_qs; 426 irq_ptr->cdev = init_data->cdev; 427 ccw_device_get_schid(irq_ptr->cdev, &irq_ptr->schid); 428 setup_queues(irq_ptr, init_data); 429 430 setup_qib(irq_ptr, init_data); 431 qdio_setup_thinint(irq_ptr); 432 set_impl_params(irq_ptr, init_data->qib_param_field_format, 433 init_data->qib_param_field, 434 init_data->input_slib_elements, 435 init_data->output_slib_elements); 436 437 /* fill input and output descriptors */ 438 setup_qdr(irq_ptr, init_data); 439 440 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */ 441 442 /* get qdio commands */ 443 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE); 444 if (!ciw) { 445 DBF_ERROR("%4x NO EQ", irq_ptr->schid.sch_no); 446 rc = -EINVAL; 447 goto out_err; 448 } 449 irq_ptr->equeue = *ciw; 450 451 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE); 452 if (!ciw) { 453 DBF_ERROR("%4x NO AQ", irq_ptr->schid.sch_no); 454 rc = -EINVAL; 455 goto out_err; 456 } 457 irq_ptr->aqueue = *ciw; 458 459 /* set new interrupt handler */ 460 irq_ptr->orig_handler = init_data->cdev->handler; 461 init_data->cdev->handler = qdio_int_handler; 462 return 0; 463 out_err: 464 qdio_release_memory(irq_ptr); 465 return rc; 466 } 467 468 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr, 469 struct ccw_device *cdev) 470 { 471 char s[80]; 472 473 snprintf(s, 80, "qdio: %s %s on SC %x using " 474 "AI:%d QEBSM:%d PRI:%d TDD:%d SIGA:%s%s%s%s%s\n", 475 dev_name(&cdev->dev), 476 (irq_ptr->qib.qfmt == QDIO_QETH_QFMT) ? "OSA" : 477 ((irq_ptr->qib.qfmt == QDIO_ZFCP_QFMT) ? "ZFCP" : "HS"), 478 irq_ptr->schid.sch_no, 479 is_thinint_irq(irq_ptr), 480 (irq_ptr->sch_token) ? 1 : 0, 481 (irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0, 482 css_general_characteristics.aif_tdd, 483 (irq_ptr->siga_flag.input) ? "R" : " ", 484 (irq_ptr->siga_flag.output) ? "W" : " ", 485 (irq_ptr->siga_flag.sync) ? "S" : " ", 486 (irq_ptr->siga_flag.sync_after_ai) ? "A" : " ", 487 (irq_ptr->siga_flag.sync_out_after_pci) ? "P" : " "); 488 printk(KERN_INFO "%s", s); 489 } 490 491 int qdio_enable_async_operation(struct qdio_output_q *outq) 492 { 493 outq->aobs = kzalloc(sizeof(struct qaob *) * QDIO_MAX_BUFFERS_PER_Q, 494 GFP_ATOMIC); 495 if (!outq->aobs) { 496 outq->use_cq = 0; 497 return -ENOMEM; 498 } 499 outq->use_cq = 1; 500 return 0; 501 } 502 503 void qdio_disable_async_operation(struct qdio_output_q *q) 504 { 505 kfree(q->aobs); 506 q->aobs = NULL; 507 q->use_cq = 0; 508 } 509 510 int __init qdio_setup_init(void) 511 { 512 int rc; 513 514 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q), 515 256, 0, NULL); 516 if (!qdio_q_cache) 517 return -ENOMEM; 518 519 qdio_aob_cache = kmem_cache_create("qdio_aob", 520 sizeof(struct qaob), 521 sizeof(struct qaob), 522 0, 523 NULL); 524 if (!qdio_aob_cache) { 525 rc = -ENOMEM; 526 goto free_qdio_q_cache; 527 } 528 529 /* Check for OSA/FCP thin interrupts (bit 67). */ 530 DBF_EVENT("thinint:%1d", 531 (css_general_characteristics.aif_osa) ? 1 : 0); 532 533 /* Check for QEBSM support in general (bit 58). */ 534 DBF_EVENT("cssQEBSM:%1d", (qebsm_possible()) ? 1 : 0); 535 rc = 0; 536 out: 537 return rc; 538 free_qdio_q_cache: 539 kmem_cache_destroy(qdio_q_cache); 540 goto out; 541 } 542 543 void qdio_setup_exit(void) 544 { 545 kmem_cache_destroy(qdio_aob_cache); 546 kmem_cache_destroy(qdio_q_cache); 547 } 548