arch/powerpc/platforms/cell/spu_manage.c

   1 /*
   2  * spu management operations for of based platforms
   3  *
   4  * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
   5  * Copyright 2006 Sony Corp.
   6  * (C) Copyright 2007 TOSHIBA CORPORATION
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include <linux/interrupt.h>
  23 #include <linux/list.h>
  24 #include <linux/export.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/wait.h>
  27 #include <linux/mm.h>
  28 #include <linux/io.h>
  29 #include <linux/mutex.h>
  30 #include <linux/device.h>
  31
  32 #include <asm/spu.h>
  33 #include <asm/spu_priv1.h>
  34 #include <asm/firmware.h>
  35 #include <asm/prom.h>
  36
  37 #include "spufs/spufs.h"
  38 #include "interrupt.h"
  39
  40 struct device_node *spu_devnode(struct spu *spu)
  41 {
  42         return spu->devnode;
  43 }
  44
  45 EXPORT_SYMBOL_GPL(spu_devnode);
  46
  47 static u64 __init find_spu_unit_number(struct device_node *spe)
  48 {
  49         const unsigned int *prop;
  50         int proplen;
  51
  52         /* new device trees should provide the physical-id attribute */
  53         prop = of_get_property(spe, "physical-id", &proplen);
  54         if (proplen == 4)
  55                 return (u64)*prop;
  56
  57         /* celleb device tree provides the unit-id */
  58         prop = of_get_property(spe, "unit-id", &proplen);
  59         if (proplen == 4)
  60                 return (u64)*prop;
  61
  62         /* legacy device trees provide the id in the reg attribute */
  63         prop = of_get_property(spe, "reg", &proplen);
  64         if (proplen == 4)
  65                 return (u64)*prop;
  66
  67         return 0;
  68 }
  69
  70 static void spu_unmap(struct spu *spu)
  71 {
  72         if (!firmware_has_feature(FW_FEATURE_LPAR))
  73                 iounmap(spu->priv1);
  74         iounmap(spu->priv2);
  75         iounmap(spu->problem);
  76         iounmap((__force u8 __iomem *)spu->local_store);
  77 }
  78
  79 static int __init spu_map_interrupts_old(struct spu *spu,
  80         struct device_node *np)
  81 {
  82         unsigned int isrc;
  83         const u32 *tmp;
  84         int nid;
  85
  86         /* Get the interrupt source unit from the device-tree */
  87         tmp = of_get_property(np, "isrc", NULL);
  88         if (!tmp)
  89                 return -ENODEV;
  90         isrc = tmp[0];
  91
  92         tmp = of_get_property(np->parent->parent, "node-id", NULL);
  93         if (!tmp) {
  94                 printk(KERN_WARNING "%s: can't find node-id\n", __func__);
  95                 nid = spu->node;
  96         } else
  97                 nid = tmp[0];
  98
  99         /* Add the node number */
 100         isrc |= nid << IIC_IRQ_NODE_SHIFT;
 101
 102         /* Now map interrupts of all 3 classes */
 103         spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
 104         spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
 105         spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
 106
 107         /* Right now, we only fail if class 2 failed */
 108         if (!spu->irqs[2])
 109                 return -EINVAL;
 110
 111         return 0;
 112 }
 113
 114 static void __iomem * __init spu_map_prop_old(struct spu *spu,
 115                                               struct device_node *n,
 116                                               const char *name)
 117 {
 118         const struct address_prop {
 119                 unsigned long address;
 120                 unsigned int len;
 121         } __attribute__((packed)) *prop;
 122         int proplen;
 123
 124         prop = of_get_property(n, name, &proplen);
 125         if (prop == NULL || proplen != sizeof (struct address_prop))
 126                 return NULL;
 127
 128         return ioremap(prop->address, prop->len);
 129 }
 130
 131 static int __init spu_map_device_old(struct spu *spu)
 132 {
 133         struct device_node *node = spu->devnode;
 134         const char *prop;
 135         int ret;
 136
 137         ret = -ENODEV;
 138         spu->name = of_get_property(node, "name", NULL);
 139         if (!spu->name)
 140                 goto out;
 141
 142         prop = of_get_property(node, "local-store", NULL);
 143         if (!prop)
 144                 goto out;
 145         spu->local_store_phys = *(unsigned long *)prop;
 146
 147         /* we use local store as ram, not io memory */
 148         spu->local_store = (void __force *)
 149                 spu_map_prop_old(spu, node, "local-store");
 150         if (!spu->local_store)
 151                 goto out;
 152
 153         prop = of_get_property(node, "problem", NULL);
 154         if (!prop)
 155                 goto out_unmap;
 156         spu->problem_phys = *(unsigned long *)prop;
 157
 158         spu->problem = spu_map_prop_old(spu, node, "problem");
 159         if (!spu->problem)
 160                 goto out_unmap;
 161
 162         spu->priv2 = spu_map_prop_old(spu, node, "priv2");
 163         if (!spu->priv2)
 164                 goto out_unmap;
 165
 166         if (!firmware_has_feature(FW_FEATURE_LPAR)) {
 167                 spu->priv1 = spu_map_prop_old(spu, node, "priv1");
 168                 if (!spu->priv1)
 169                         goto out_unmap;
 170         }
 171
 172         ret = 0;
 173         goto out;
 174
 175 out_unmap:
 176         spu_unmap(spu);
 177 out:
 178         return ret;
 179 }
 180
 181 static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
 182 {
 183         struct of_phandle_args oirq;
 184         int ret;
 185         int i;
 186
 187         for (i=0; i < 3; i++) {
 188                 ret = of_irq_parse_one(np, i, &oirq);
 189                 if (ret) {
 190                         pr_debug("spu_new: failed to get irq %d\n", i);
 191                         goto err;
 192                 }
 193                 ret = -EINVAL;
 194                 pr_debug("  irq %d no 0x%x on %pOF\n", i, oirq.args[0],
 195                          oirq.np);
 196                 spu->irqs[i] = irq_create_of_mapping(&oirq);
 197                 if (!spu->irqs[i]) {
 198                         pr_debug("spu_new: failed to map it !\n");
 199                         goto err;
 200                 }
 201         }
 202         return 0;
 203
 204 err:
 205         pr_debug("failed to map irq %x for spu %s\n", *oirq.args,
 206                 spu->name);
 207         for (; i >= 0; i--) {
 208                 if (spu->irqs[i])
 209                         irq_dispose_mapping(spu->irqs[i]);
 210         }
 211         return ret;
 212 }
 213
 214 static int spu_map_resource(struct spu *spu, int nr,
 215                             void __iomem** virt, unsigned long *phys)
 216 {
 217         struct device_node *np = spu->devnode;
 218         struct resource resource = { };
 219         unsigned long len;
 220         int ret;
 221
 222         ret = of_address_to_resource(np, nr, &resource);
 223         if (ret)
 224                 return ret;
 225         if (phys)
 226                 *phys = resource.start;
 227         len = resource_size(&resource);
 228         *virt = ioremap(resource.start, len);
 229         if (!*virt)
 230                 return -EINVAL;
 231         return 0;
 232 }
 233
 234 static int __init spu_map_device(struct spu *spu)
 235 {
 236         struct device_node *np = spu->devnode;
 237         int ret = -ENODEV;
 238
 239         spu->name = of_get_property(np, "name", NULL);
 240         if (!spu->name)
 241                 goto out;
 242
 243         ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
 244                                &spu->local_store_phys);
 245         if (ret) {
 246                 pr_debug("spu_new: failed to map %pOF resource 0\n",
 247                          np);
 248                 goto out;
 249         }
 250         ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
 251                                &spu->problem_phys);
 252         if (ret) {
 253                 pr_debug("spu_new: failed to map %pOF resource 1\n",
 254                          np);
 255                 goto out_unmap;
 256         }
 257         ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
 258         if (ret) {
 259                 pr_debug("spu_new: failed to map %pOF resource 2\n",
 260                          np);
 261                 goto out_unmap;
 262         }
 263         if (!firmware_has_feature(FW_FEATURE_LPAR))
 264                 ret = spu_map_resource(spu, 3,
 265                                (void __iomem**)&spu->priv1, NULL);
 266         if (ret) {
 267                 pr_debug("spu_new: failed to map %pOF resource 3\n",
 268                          np);
 269                 goto out_unmap;
 270         }
 271         pr_debug("spu_new: %pOF maps:\n", np);
 272         pr_debug("  local store   : 0x%016lx -> 0x%p\n",
 273                  spu->local_store_phys, spu->local_store);
 274         pr_debug("  problem state : 0x%016lx -> 0x%p\n",
 275                  spu->problem_phys, spu->problem);
 276         pr_debug("  priv2         :                       0x%p\n", spu->priv2);
 277         pr_debug("  priv1         :                       0x%p\n", spu->priv1);
 278
 279         return 0;
 280
 281 out_unmap:
 282         spu_unmap(spu);
 283 out:
 284         pr_debug("failed to map spe %s: %d\n", spu->name, ret);
 285         return ret;
 286 }
 287
 288 static int __init of_enumerate_spus(int (*fn)(void *data))
 289 {
 290         int ret;
 291         struct device_node *node;
 292         unsigned int n = 0;
 293
 294         ret = -ENODEV;
 295         for_each_node_by_type(node, "spe") {
 296                 ret = fn(node);
 297                 if (ret) {
 298                         printk(KERN_WARNING "%s: Error initializing %s\n",
 299                                 __func__, node->name);
 300                         of_node_put(node);
 301                         break;
 302                 }
 303                 n++;
 304         }
 305         return ret ? ret : n;
 306 }
 307
 308 static int __init of_create_spu(struct spu *spu, void *data)
 309 {
 310         int ret;
 311         struct device_node *spe = (struct device_node *)data;
 312         static int legacy_map = 0, legacy_irq = 0;
 313
 314         spu->devnode = of_node_get(spe);
 315         spu->spe_id = find_spu_unit_number(spe);
 316
 317         spu->node = of_node_to_nid(spe);
 318         if (spu->node >= MAX_NUMNODES) {
 319                 printk(KERN_WARNING "SPE %pOF on node %d ignored,"
 320                        " node number too big\n", spe, spu->node);
 321                 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
 322                 ret = -ENODEV;
 323                 goto out;
 324         }
 325
 326         ret = spu_map_device(spu);
 327         if (ret) {
 328                 if (!legacy_map) {
 329                         legacy_map = 1;
 330                         printk(KERN_WARNING "%s: Legacy device tree found, "
 331                                 "trying to map old style\n", __func__);
 332                 }
 333                 ret = spu_map_device_old(spu);
 334                 if (ret) {
 335                         printk(KERN_ERR "Unable to map %s\n",
 336                                 spu->name);
 337                         goto out;
 338                 }
 339         }
 340
 341         ret = spu_map_interrupts(spu, spe);
 342         if (ret) {
 343                 if (!legacy_irq) {
 344                         legacy_irq = 1;
 345                         printk(KERN_WARNING "%s: Legacy device tree found, "
 346                                 "trying old style irq\n", __func__);
 347                 }
 348                 ret = spu_map_interrupts_old(spu, spe);
 349                 if (ret) {
 350                         printk(KERN_ERR "%s: could not map interrupts\n",
 351                                 spu->name);
 352                         goto out_unmap;
 353                 }
 354         }
 355
 356         pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
 357                 spu->local_store, spu->problem, spu->priv1,
 358                 spu->priv2, spu->number);
 359         goto out;
 360
 361 out_unmap:
 362         spu_unmap(spu);
 363 out:
 364         return ret;
 365 }
 366
 367 static int of_destroy_spu(struct spu *spu)
 368 {
 369         spu_unmap(spu);
 370         of_node_put(spu->devnode);
 371         return 0;
 372 }
 373
 374 static void enable_spu_by_master_run(struct spu_context *ctx)
 375 {
 376         ctx->ops->master_start(ctx);
 377 }
 378
 379 static void disable_spu_by_master_run(struct spu_context *ctx)
 380 {
 381         ctx->ops->master_stop(ctx);
 382 }
 383
 384 /* Hardcoded affinity idxs for qs20 */
 385 #define QS20_SPES_PER_BE 8
 386 static int qs20_reg_idxs[QS20_SPES_PER_BE] =   { 0, 2, 4, 6, 7, 5, 3, 1 };
 387 static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
 388
 389 static struct spu *spu_lookup_reg(int node, u32 reg)
 390 {
 391         struct spu *spu;
 392         const u32 *spu_reg;
 393
 394         list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
 395                 spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
 396                 if (*spu_reg == reg)
 397                         return spu;
 398         }
 399         return NULL;
 400 }
 401
 402 static void init_affinity_qs20_harcoded(void)
 403 {
 404         int node, i;
 405         struct spu *last_spu, *spu;
 406         u32 reg;
 407
 408         for (node = 0; node < MAX_NUMNODES; node++) {
 409                 last_spu = NULL;
 410                 for (i = 0; i < QS20_SPES_PER_BE; i++) {
 411                         reg = qs20_reg_idxs[i];
 412                         spu = spu_lookup_reg(node, reg);
 413                         if (!spu)
 414                                 continue;
 415                         spu->has_mem_affinity = qs20_reg_memory[reg];
 416                         if (last_spu)
 417                                 list_add_tail(&spu->aff_list,
 418                                                 &last_spu->aff_list);
 419                         last_spu = spu;
 420                 }
 421         }
 422 }
 423
 424 static int of_has_vicinity(void)
 425 {
 426         struct device_node *dn;
 427
 428         for_each_node_by_type(dn, "spe") {
 429                 if (of_find_property(dn, "vicinity", NULL))  {
 430                         of_node_put(dn);
 431                         return 1;
 432                 }
 433         }
 434         return 0;
 435 }
 436
 437 static struct spu *devnode_spu(int cbe, struct device_node *dn)
 438 {
 439         struct spu *spu;
 440
 441         list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
 442                 if (spu_devnode(spu) == dn)
 443                         return spu;
 444         return NULL;
 445 }
 446
 447 static struct spu *
 448 neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
 449 {
 450         struct spu *spu;
 451         struct device_node *spu_dn;
 452         const phandle *vic_handles;
 453         int lenp, i;
 454
 455         list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
 456                 spu_dn = spu_devnode(spu);
 457                 if (spu_dn == avoid)
 458                         continue;
 459                 vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
 460                 for (i=0; i < (lenp / sizeof(phandle)); i++) {
 461                         if (vic_handles[i] == target->phandle)
 462                                 return spu;
 463                 }
 464         }
 465         return NULL;
 466 }
 467
 468 static void init_affinity_node(int cbe)
 469 {
 470         struct spu *spu, *last_spu;
 471         struct device_node *vic_dn, *last_spu_dn;
 472         phandle avoid_ph;
 473         const phandle *vic_handles;
 474         const char *name;
 475         int lenp, i, added;
 476
 477         last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
 478                                                                 cbe_list);
 479         avoid_ph = 0;
 480         for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
 481                 last_spu_dn = spu_devnode(last_spu);
 482                 vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);
 483
 484                 /*
 485                  * Walk through each phandle in vicinity property of the spu
 486                  * (tipically two vicinity phandles per spe node)
 487                  */
 488                 for (i = 0; i < (lenp / sizeof(phandle)); i++) {
 489                         if (vic_handles[i] == avoid_ph)
 490                                 continue;
 491
 492                         vic_dn = of_find_node_by_phandle(vic_handles[i]);
 493                         if (!vic_dn)
 494                                 continue;
 495
 496                         /* a neighbour might be spe, mic-tm, or bif0 */
 497                         name = of_get_property(vic_dn, "name", NULL);
 498                         if (!name)
 499                                 continue;
 500
 501                         if (strcmp(name, "spe") == 0) {
 502                                 spu = devnode_spu(cbe, vic_dn);
 503                                 avoid_ph = last_spu_dn->phandle;
 504                         } else {
 505                                 /*
 506                                  * "mic-tm" and "bif0" nodes do not have
 507                                  * vicinity property. So we need to find the
 508                                  * spe which has vic_dn as neighbour, but
 509                                  * skipping the one we came from (last_spu_dn)
 510                                  */
 511                                 spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
 512                                 if (!spu)
 513                                         continue;
 514                                 if (!strcmp(name, "mic-tm")) {
 515                                         last_spu->has_mem_affinity = 1;
 516                                         spu->has_mem_affinity = 1;
 517                                 }
 518                                 avoid_ph = vic_dn->phandle;
 519                         }
 520
 521                         list_add_tail(&spu->aff_list, &last_spu->aff_list);
 522                         last_spu = spu;
 523                         break;
 524                 }
 525         }
 526 }
 527
 528 static void init_affinity_fw(void)
 529 {
 530         int cbe;
 531
 532         for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
 533                 init_affinity_node(cbe);
 534 }
 535
 536 static int __init init_affinity(void)
 537 {
 538         if (of_has_vicinity()) {
 539                 init_affinity_fw();
 540         } else {
 541                 if (of_machine_is_compatible("IBM,CPBW-1.0"))
 542                         init_affinity_qs20_harcoded();
 543                 else
 544                         printk("No affinity configuration found\n");
 545         }
 546
 547         return 0;
 548 }
 549
 550 const struct spu_management_ops spu_management_of_ops = {
 551         .enumerate_spus = of_enumerate_spus,
 552         .create_spu = of_create_spu,
 553         .destroy_spu = of_destroy_spu,
 554         .enable_spu = enable_spu_by_master_run,
 555         .disable_spu = disable_spu_by_master_run,
 556         .init_affinity = init_affinity,
 557 };