1 /* 2 * driver/s390/cio/qdio_setup.c 3 * 4 * qdio queue initialization 5 * 6 * Copyright (C) IBM Corp. 2008 7 * Author(s): Jan Glauber <jang@linux.vnet.ibm.com> 8 */ 9 #include <linux/kernel.h> 10 #include <linux/slab.h> 11 #include <asm/qdio.h> 12 13 #include "cio.h" 14 #include "css.h" 15 #include "device.h" 16 #include "ioasm.h" 17 #include "chsc.h" 18 #include "qdio.h" 19 #include "qdio_debug.h" 20 21 static struct kmem_cache *qdio_q_cache; 22 23 /* 24 * qebsm is only available under 64bit but the adapter sets the feature 25 * flag anyway, so we manually override it. 26 */ 27 static inline int qebsm_possible(void) 28 { 29 #ifdef CONFIG_64BIT 30 return css_general_characteristics.qebsm; 31 #endif 32 return 0; 33 } 34 35 /* 36 * qib_param_field: pointer to 128 bytes or NULL, if no param field 37 * nr_input_qs: pointer to nr_queues*128 words of data or NULL 38 */ 39 static void set_impl_params(struct qdio_irq *irq_ptr, 40 unsigned int qib_param_field_format, 41 unsigned char *qib_param_field, 42 unsigned long *input_slib_elements, 43 unsigned long *output_slib_elements) 44 { 45 struct qdio_q *q; 46 int i, j; 47 48 if (!irq_ptr) 49 return; 50 51 WARN_ON((unsigned long)&irq_ptr->qib & 0xff); 52 irq_ptr->qib.pfmt = qib_param_field_format; 53 if (qib_param_field) 54 memcpy(irq_ptr->qib.parm, qib_param_field, 55 QDIO_MAX_BUFFERS_PER_Q); 56 57 if (!input_slib_elements) 58 goto output; 59 60 for_each_input_queue(irq_ptr, q, i) { 61 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 62 q->slib->slibe[j].parms = 63 input_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 64 } 65 output: 66 if (!output_slib_elements) 67 return; 68 69 for_each_output_queue(irq_ptr, q, i) { 70 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 71 q->slib->slibe[j].parms = 72 output_slib_elements[i * QDIO_MAX_BUFFERS_PER_Q + j]; 73 } 74 } 75 76 static int __qdio_allocate_qs(struct qdio_q **irq_ptr_qs, int nr_queues) 77 { 78 struct qdio_q *q; 79 int i; 80 81 for (i = 0; i < nr_queues; i++) { 82 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL); 83 if (!q) 84 return -ENOMEM; 85 WARN_ON((unsigned long)q & 0xff); 86 87 q->slib = (struct slib *) __get_free_page(GFP_KERNEL); 88 if (!q->slib) { 89 kmem_cache_free(qdio_q_cache, q); 90 return -ENOMEM; 91 } 92 WARN_ON((unsigned long)q->slib & 0x7ff); 93 irq_ptr_qs[i] = q; 94 } 95 return 0; 96 } 97 98 int qdio_allocate_qs(struct qdio_irq *irq_ptr, int nr_input_qs, int nr_output_qs) 99 { 100 int rc; 101 102 rc = __qdio_allocate_qs(irq_ptr->input_qs, nr_input_qs); 103 if (rc) 104 return rc; 105 rc = __qdio_allocate_qs(irq_ptr->output_qs, nr_output_qs); 106 return rc; 107 } 108 109 static void setup_queues_misc(struct qdio_q *q, struct qdio_irq *irq_ptr, 110 qdio_handler_t *handler, int i) 111 { 112 /* must be cleared by every qdio_establish */ 113 memset(q, 0, ((char *)&q->slib) - ((char *)q)); 114 memset(q->slib, 0, PAGE_SIZE); 115 116 q->irq_ptr = irq_ptr; 117 q->mask = 1 << (31 - i); 118 q->nr = i; 119 q->handler = handler; 120 } 121 122 static void setup_storage_lists(struct qdio_q *q, struct qdio_irq *irq_ptr, 123 void **sbals_array, char *dbf_text, int i) 124 { 125 struct qdio_q *prev; 126 int j; 127 128 QDIO_DBF_TEXT0(0, setup, dbf_text); 129 QDIO_DBF_HEX0(0, setup, &q, sizeof(void *)); 130 131 q->sl = (struct sl *)((char *)q->slib + PAGE_SIZE / 2); 132 133 /* fill in sbal */ 134 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) { 135 q->sbal[j] = *sbals_array++; 136 WARN_ON((unsigned long)q->sbal[j] & 0xff); 137 } 138 139 /* fill in slib */ 140 if (i > 0) { 141 prev = (q->is_input_q) ? irq_ptr->input_qs[i - 1] 142 : irq_ptr->output_qs[i - 1]; 143 prev->slib->nsliba = (unsigned long)q->slib; 144 } 145 146 q->slib->sla = (unsigned long)q->sl; 147 q->slib->slsba = (unsigned long)&q->slsb.val[0]; 148 149 /* fill in sl */ 150 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++) 151 q->sl->element[j].sbal = (unsigned long)q->sbal[j]; 152 153 QDIO_DBF_TEXT2(0, setup, "sl-sb-b0"); 154 QDIO_DBF_HEX2(0, setup, q->sl, sizeof(void *)); 155 QDIO_DBF_HEX2(0, setup, &q->slsb, sizeof(void *)); 156 QDIO_DBF_HEX2(0, setup, q->sbal, sizeof(void *)); 157 } 158 159 static void setup_queues(struct qdio_irq *irq_ptr, 160 struct qdio_initialize *qdio_init) 161 { 162 char dbf_text[20]; 163 struct qdio_q *q; 164 void **input_sbal_array = qdio_init->input_sbal_addr_array; 165 void **output_sbal_array = qdio_init->output_sbal_addr_array; 166 int i; 167 168 sprintf(dbf_text, "qfqs%4x", qdio_init->cdev->private->schid.sch_no); 169 QDIO_DBF_TEXT0(0, setup, dbf_text); 170 171 for_each_input_queue(irq_ptr, q, i) { 172 sprintf(dbf_text, "in-q%4x", i); 173 setup_queues_misc(q, irq_ptr, qdio_init->input_handler, i); 174 175 q->is_input_q = 1; 176 spin_lock_init(&q->u.in.lock); 177 setup_storage_lists(q, irq_ptr, input_sbal_array, dbf_text, i); 178 input_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 179 180 if (is_thinint_irq(irq_ptr)) 181 tasklet_init(&q->tasklet, tiqdio_inbound_processing, 182 (unsigned long) q); 183 else 184 tasklet_init(&q->tasklet, qdio_inbound_processing, 185 (unsigned long) q); 186 } 187 188 for_each_output_queue(irq_ptr, q, i) { 189 sprintf(dbf_text, "outq%4x", i); 190 setup_queues_misc(q, irq_ptr, qdio_init->output_handler, i); 191 192 q->is_input_q = 0; 193 setup_storage_lists(q, irq_ptr, output_sbal_array, 194 dbf_text, i); 195 output_sbal_array += QDIO_MAX_BUFFERS_PER_Q; 196 197 tasklet_init(&q->tasklet, qdio_outbound_processing, 198 (unsigned long) q); 199 setup_timer(&q->u.out.timer, (void(*)(unsigned long)) 200 &qdio_outbound_timer, (unsigned long)q); 201 } 202 } 203 204 static void process_ac_flags(struct qdio_irq *irq_ptr, unsigned char qdioac) 205 { 206 if (qdioac & AC1_SIGA_INPUT_NEEDED) 207 irq_ptr->siga_flag.input = 1; 208 if (qdioac & AC1_SIGA_OUTPUT_NEEDED) 209 irq_ptr->siga_flag.output = 1; 210 if (qdioac & AC1_SIGA_SYNC_NEEDED) 211 irq_ptr->siga_flag.sync = 1; 212 if (qdioac & AC1_AUTOMATIC_SYNC_ON_THININT) 213 irq_ptr->siga_flag.no_sync_ti = 1; 214 if (qdioac & AC1_AUTOMATIC_SYNC_ON_OUT_PCI) 215 irq_ptr->siga_flag.no_sync_out_pci = 1; 216 217 if (irq_ptr->siga_flag.no_sync_out_pci && 218 irq_ptr->siga_flag.no_sync_ti) 219 irq_ptr->siga_flag.no_sync_out_ti = 1; 220 } 221 222 static void check_and_setup_qebsm(struct qdio_irq *irq_ptr, 223 unsigned char qdioac, unsigned long token) 224 { 225 char dbf_text[15]; 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 QDIO_DBF_TEXT0(0, setup, "V=V:1"); 236 sprintf(dbf_text, "%8lx", irq_ptr->sch_token); 237 QDIO_DBF_TEXT0(0, setup, dbf_text); 238 return; 239 240 no_qebsm: 241 irq_ptr->sch_token = 0; 242 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM; 243 QDIO_DBF_TEXT0(0, setup, "noV=V"); 244 } 245 246 static int __get_ssqd_info(struct qdio_irq *irq_ptr) 247 { 248 struct chsc_ssqd_area *ssqd; 249 int rc; 250 251 QDIO_DBF_TEXT0(0, setup, "getssqd"); 252 ssqd = (struct chsc_ssqd_area *)irq_ptr->chsc_page; 253 memset(ssqd, 0, PAGE_SIZE); 254 255 ssqd->request = (struct chsc_header) { 256 .length = 0x0010, 257 .code = 0x0024, 258 }; 259 ssqd->first_sch = irq_ptr->schid.sch_no; 260 ssqd->last_sch = irq_ptr->schid.sch_no; 261 ssqd->ssid = irq_ptr->schid.ssid; 262 263 if (chsc(ssqd)) 264 return -EIO; 265 rc = chsc_error_from_response(ssqd->response.code); 266 if (rc) 267 return rc; 268 269 if (!(ssqd->qdio_ssqd.flags & CHSC_FLAG_QDIO_CAPABILITY) || 270 !(ssqd->qdio_ssqd.flags & CHSC_FLAG_VALIDITY) || 271 (ssqd->qdio_ssqd.sch != irq_ptr->schid.sch_no)) 272 return -EINVAL; 273 274 memcpy(&irq_ptr->ssqd_desc, &ssqd->qdio_ssqd, 275 sizeof(struct qdio_ssqd_desc)); 276 return 0; 277 } 278 279 void qdio_setup_ssqd_info(struct qdio_irq *irq_ptr) 280 { 281 unsigned char qdioac; 282 char dbf_text[15]; 283 int rc; 284 285 rc = __get_ssqd_info(irq_ptr); 286 if (rc) { 287 QDIO_DBF_TEXT2(0, setup, "ssqdasig"); 288 sprintf(dbf_text, "schno%x", irq_ptr->schid.sch_no); 289 QDIO_DBF_TEXT2(0, setup, dbf_text); 290 sprintf(dbf_text, "rc:%d", rc); 291 QDIO_DBF_TEXT2(0, setup, dbf_text); 292 /* all flags set, worst case */ 293 qdioac = AC1_SIGA_INPUT_NEEDED | AC1_SIGA_OUTPUT_NEEDED | 294 AC1_SIGA_SYNC_NEEDED; 295 } else 296 qdioac = irq_ptr->ssqd_desc.qdioac1; 297 298 check_and_setup_qebsm(irq_ptr, qdioac, irq_ptr->ssqd_desc.sch_token); 299 process_ac_flags(irq_ptr, qdioac); 300 301 sprintf(dbf_text, "qdioac%2x", qdioac); 302 QDIO_DBF_TEXT2(0, setup, dbf_text); 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 free_page((unsigned long) q->slib); 325 kmem_cache_free(qdio_q_cache, q); 326 } 327 } 328 kfree(irq_ptr->qdr); 329 free_page(irq_ptr->chsc_page); 330 free_page((unsigned long) irq_ptr); 331 } 332 333 static void __qdio_allocate_fill_qdr(struct qdio_irq *irq_ptr, 334 struct qdio_q **irq_ptr_qs, 335 int i, int nr) 336 { 337 irq_ptr->qdr->qdf0[i + nr].sliba = 338 (unsigned long)irq_ptr_qs[i]->slib; 339 340 irq_ptr->qdr->qdf0[i + nr].sla = 341 (unsigned long)irq_ptr_qs[i]->sl; 342 343 irq_ptr->qdr->qdf0[i + nr].slsba = 344 (unsigned long)&irq_ptr_qs[i]->slsb.val[0]; 345 346 irq_ptr->qdr->qdf0[i + nr].akey = PAGE_DEFAULT_KEY; 347 irq_ptr->qdr->qdf0[i + nr].bkey = PAGE_DEFAULT_KEY; 348 irq_ptr->qdr->qdf0[i + nr].ckey = PAGE_DEFAULT_KEY; 349 irq_ptr->qdr->qdf0[i + nr].dkey = PAGE_DEFAULT_KEY; 350 } 351 352 static void setup_qdr(struct qdio_irq *irq_ptr, 353 struct qdio_initialize *qdio_init) 354 { 355 int i; 356 357 irq_ptr->qdr->qfmt = qdio_init->q_format; 358 irq_ptr->qdr->iqdcnt = qdio_init->no_input_qs; 359 irq_ptr->qdr->oqdcnt = qdio_init->no_output_qs; 360 irq_ptr->qdr->iqdsz = sizeof(struct qdesfmt0) / 4; /* size in words */ 361 irq_ptr->qdr->oqdsz = sizeof(struct qdesfmt0) / 4; 362 irq_ptr->qdr->qiba = (unsigned long)&irq_ptr->qib; 363 irq_ptr->qdr->qkey = PAGE_DEFAULT_KEY; 364 365 for (i = 0; i < qdio_init->no_input_qs; i++) 366 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->input_qs, i, 0); 367 368 for (i = 0; i < qdio_init->no_output_qs; i++) 369 __qdio_allocate_fill_qdr(irq_ptr, irq_ptr->output_qs, i, 370 qdio_init->no_input_qs); 371 } 372 373 static void setup_qib(struct qdio_irq *irq_ptr, 374 struct qdio_initialize *init_data) 375 { 376 if (qebsm_possible()) 377 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM; 378 379 irq_ptr->qib.qfmt = init_data->q_format; 380 if (init_data->no_input_qs) 381 irq_ptr->qib.isliba = 382 (unsigned long)(irq_ptr->input_qs[0]->slib); 383 if (init_data->no_output_qs) 384 irq_ptr->qib.osliba = 385 (unsigned long)(irq_ptr->output_qs[0]->slib); 386 memcpy(irq_ptr->qib.ebcnam, init_data->adapter_name, 8); 387 } 388 389 int qdio_setup_irq(struct qdio_initialize *init_data) 390 { 391 struct ciw *ciw; 392 struct qdio_irq *irq_ptr = init_data->cdev->private->qdio_data; 393 int rc; 394 395 memset(irq_ptr, 0, ((char *)&irq_ptr->qdr) - ((char *)irq_ptr)); 396 /* wipes qib.ac, required by ar7063 */ 397 memset(irq_ptr->qdr, 0, sizeof(struct qdr)); 398 399 irq_ptr->int_parm = init_data->int_parm; 400 irq_ptr->nr_input_qs = init_data->no_input_qs; 401 irq_ptr->nr_output_qs = init_data->no_output_qs; 402 403 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev); 404 irq_ptr->cdev = init_data->cdev; 405 setup_queues(irq_ptr, init_data); 406 407 setup_qib(irq_ptr, init_data); 408 qdio_setup_thinint(irq_ptr); 409 set_impl_params(irq_ptr, init_data->qib_param_field_format, 410 init_data->qib_param_field, 411 init_data->input_slib_elements, 412 init_data->output_slib_elements); 413 414 /* fill input and output descriptors */ 415 setup_qdr(irq_ptr, init_data); 416 417 /* qdr, qib, sls, slsbs, slibs, sbales are filled now */ 418 419 /* get qdio commands */ 420 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE); 421 if (!ciw) { 422 QDIO_DBF_TEXT2(1, setup, "no eq"); 423 rc = -EINVAL; 424 goto out_err; 425 } 426 irq_ptr->equeue = *ciw; 427 428 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE); 429 if (!ciw) { 430 QDIO_DBF_TEXT2(1, setup, "no aq"); 431 rc = -EINVAL; 432 goto out_err; 433 } 434 irq_ptr->aqueue = *ciw; 435 436 /* set new interrupt handler */ 437 irq_ptr->orig_handler = init_data->cdev->handler; 438 init_data->cdev->handler = qdio_int_handler; 439 return 0; 440 out_err: 441 qdio_release_memory(irq_ptr); 442 return rc; 443 } 444 445 void qdio_print_subchannel_info(struct qdio_irq *irq_ptr, 446 struct ccw_device *cdev) 447 { 448 char s[80]; 449 450 sprintf(s, "%s ", cdev->dev.bus_id); 451 452 switch (irq_ptr->qib.qfmt) { 453 case QDIO_QETH_QFMT: 454 sprintf(s + strlen(s), "OSADE "); 455 break; 456 case QDIO_ZFCP_QFMT: 457 sprintf(s + strlen(s), "ZFCP "); 458 break; 459 case QDIO_IQDIO_QFMT: 460 sprintf(s + strlen(s), "HiperSockets "); 461 break; 462 } 463 sprintf(s + strlen(s), "using: "); 464 465 if (!is_thinint_irq(irq_ptr)) 466 sprintf(s + strlen(s), "no"); 467 sprintf(s + strlen(s), "AdapterInterrupts "); 468 if (!(irq_ptr->sch_token != 0)) 469 sprintf(s + strlen(s), "no"); 470 sprintf(s + strlen(s), "QEBSM "); 471 if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED)) 472 sprintf(s + strlen(s), "no"); 473 sprintf(s + strlen(s), "OutboundPCI "); 474 if (!css_general_characteristics.aif_tdd) 475 sprintf(s + strlen(s), "no"); 476 sprintf(s + strlen(s), "TDD\n"); 477 printk(KERN_INFO "qdio: %s", s); 478 479 memset(s, 0, sizeof(s)); 480 sprintf(s, "%s SIGA required: ", cdev->dev.bus_id); 481 if (irq_ptr->siga_flag.input) 482 sprintf(s + strlen(s), "Read "); 483 if (irq_ptr->siga_flag.output) 484 sprintf(s + strlen(s), "Write "); 485 if (irq_ptr->siga_flag.sync) 486 sprintf(s + strlen(s), "Sync "); 487 if (!irq_ptr->siga_flag.no_sync_ti) 488 sprintf(s + strlen(s), "SyncAI "); 489 if (!irq_ptr->siga_flag.no_sync_out_ti) 490 sprintf(s + strlen(s), "SyncOutAI "); 491 if (!irq_ptr->siga_flag.no_sync_out_pci) 492 sprintf(s + strlen(s), "SyncOutPCI"); 493 sprintf(s + strlen(s), "\n"); 494 printk(KERN_INFO "qdio: %s", s); 495 } 496 497 int __init qdio_setup_init(void) 498 { 499 char dbf_text[15]; 500 501 qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q), 502 256, 0, NULL); 503 if (!qdio_q_cache) 504 return -ENOMEM; 505 506 /* Check for OSA/FCP thin interrupts (bit 67). */ 507 sprintf(dbf_text, "thini%1x", 508 (css_general_characteristics.aif_osa) ? 1 : 0); 509 QDIO_DBF_TEXT0(0, setup, dbf_text); 510 511 /* Check for QEBSM support in general (bit 58). */ 512 sprintf(dbf_text, "cssQBS:%1x", 513 (qebsm_possible()) ? 1 : 0); 514 QDIO_DBF_TEXT0(0, setup, dbf_text); 515 return 0; 516 } 517 518 void __exit qdio_setup_exit(void) 519 { 520 kmem_cache_destroy(qdio_q_cache); 521 } 522