arch/powerpc/platforms/cell/spu_manage.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * spu management operations for of based platforms
   4  *
   5  * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
   6  * Copyright 2006 Sony Corp.
   7  * (C) Copyright 2007 TOSHIBA CORPORATION
   8  */
   9
  10 #include <linux/interrupt.h>
  11 #include <linux/list.h>
  12 #include <linux/export.h>
  13 #include <linux/ptrace.h>
  14 #include <linux/wait.h>
  15 #include <linux/mm.h>
  16 #include <linux/io.h>
  17 #include <linux/mutex.h>
  18 #include <linux/device.h>
  19 #include <linux/of_address.h>
  20 #include <linux/of_irq.h>
  21
  22 #include <asm/spu.h>
  23 #include <asm/spu_priv1.h>
  24 #include <asm/firmware.h>
  25
  26 #include "spufs/spufs.h"
  27 #include "interrupt.h"
  28 #include "spu_priv1_mmio.h"
  29
  30 struct device_node *spu_devnode(struct spu *spu)
  31 {
  32         return spu->devnode;
  33 }
  34
  35 EXPORT_SYMBOL_GPL(spu_devnode);
  36
  37 static u64 __init find_spu_unit_number(struct device_node *spe)
  38 {
  39         const unsigned int *prop;
  40         int proplen;
  41
  42         /* new device trees should provide the physical-id attribute */
  43         prop = of_get_property(spe, "physical-id", &proplen);
  44         if (proplen == 4)
  45                 return (u64)*prop;
  46
  47         /* celleb device tree provides the unit-id */
  48         prop = of_get_property(spe, "unit-id", &proplen);
  49         if (proplen == 4)
  50                 return (u64)*prop;
  51
  52         /* legacy device trees provide the id in the reg attribute */
  53         prop = of_get_property(spe, "reg", &proplen);
  54         if (proplen == 4)
  55                 return (u64)*prop;
  56
  57         return 0;
  58 }
  59
  60 static void spu_unmap(struct spu *spu)
  61 {
  62         if (!firmware_has_feature(FW_FEATURE_LPAR))
  63                 iounmap(spu->priv1);
  64         iounmap(spu->priv2);
  65         iounmap(spu->problem);
  66         iounmap((__force u8 __iomem *)spu->local_store);
  67 }
  68
  69 static int __init spu_map_interrupts_old(struct spu *spu,
  70         struct device_node *np)
  71 {
  72         unsigned int isrc;
  73         const u32 *tmp;
  74         int nid;
  75
  76         /* Get the interrupt source unit from the device-tree */
  77         tmp = of_get_property(np, "isrc", NULL);
  78         if (!tmp)
  79                 return -ENODEV;
  80         isrc = tmp[0];
  81
  82         tmp = of_get_property(np->parent->parent, "node-id", NULL);
  83         if (!tmp) {
  84                 printk(KERN_WARNING "%s: can't find node-id\n", __func__);
  85                 nid = spu->node;
  86         } else
  87                 nid = tmp[0];
  88
  89         /* Add the node number */
  90         isrc |= nid << IIC_IRQ_NODE_SHIFT;
  91
  92         /* Now map interrupts of all 3 classes */
  93         spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
  94         spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
  95         spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
  96
  97         /* Right now, we only fail if class 2 failed */
  98         if (!spu->irqs[2])
  99                 return -EINVAL;
 100
 101         return 0;
 102 }
 103
 104 static void __iomem * __init spu_map_prop_old(struct spu *spu,
 105                                               struct device_node *n,
 106                                               const char *name)
 107 {
 108         const struct address_prop {
 109                 unsigned long address;
 110                 unsigned int len;
 111         } __attribute__((packed)) *prop;
 112         int proplen;
 113
 114         prop = of_get_property(n, name, &proplen);
 115         if (prop == NULL || proplen != sizeof (struct address_prop))
 116                 return NULL;
 117
 118         return ioremap(prop->address, prop->len);
 119 }
 120
 121 static int __init spu_map_device_old(struct spu *spu)
 122 {
 123         struct device_node *node = spu->devnode;
 124         const char *prop;
 125         int ret;
 126
 127         ret = -ENODEV;
 128         spu->name = of_get_property(node, "name", NULL);
 129         if (!spu->name)
 130                 goto out;
 131
 132         prop = of_get_property(node, "local-store", NULL);
 133         if (!prop)
 134                 goto out;
 135         spu->local_store_phys = *(unsigned long *)prop;
 136
 137         /* we use local store as ram, not io memory */
 138         spu->local_store = (void __force *)
 139                 spu_map_prop_old(spu, node, "local-store");
 140         if (!spu->local_store)
 141                 goto out;
 142
 143         prop = of_get_property(node, "problem", NULL);
 144         if (!prop)
 145                 goto out_unmap;
 146         spu->problem_phys = *(unsigned long *)prop;
 147
 148         spu->problem = spu_map_prop_old(spu, node, "problem");
 149         if (!spu->problem)
 150                 goto out_unmap;
 151
 152         spu->priv2 = spu_map_prop_old(spu, node, "priv2");
 153         if (!spu->priv2)
 154                 goto out_unmap;
 155
 156         if (!firmware_has_feature(FW_FEATURE_LPAR)) {
 157                 spu->priv1 = spu_map_prop_old(spu, node, "priv1");
 158                 if (!spu->priv1)
 159                         goto out_unmap;
 160         }
 161
 162         ret = 0;
 163         goto out;
 164
 165 out_unmap:
 166         spu_unmap(spu);
 167 out:
 168         return ret;
 169 }
 170
 171 static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
 172 {
 173         int i;
 174
 175         for (i=0; i < 3; i++) {
 176                 spu->irqs[i] = irq_of_parse_and_map(np, i);
 177                 if (!spu->irqs[i])
 178                         goto err;
 179         }
 180         return 0;
 181
 182 err:
 183         pr_debug("failed to map irq %x for spu %s\n", i, spu->name);
 184         for (; i >= 0; i--) {
 185                 if (spu->irqs[i])
 186                         irq_dispose_mapping(spu->irqs[i]);
 187         }
 188         return -EINVAL;
 189 }
 190
 191 static int __init spu_map_resource(struct spu *spu, int nr,
 192                             void __iomem** virt, unsigned long *phys)
 193 {
 194         struct device_node *np = spu->devnode;
 195         struct resource resource = { };
 196         unsigned long len;
 197         int ret;
 198
 199         ret = of_address_to_resource(np, nr, &resource);
 200         if (ret)
 201                 return ret;
 202         if (phys)
 203                 *phys = resource.start;
 204         len = resource_size(&resource);
 205         *virt = ioremap(resource.start, len);
 206         if (!*virt)
 207                 return -EINVAL;
 208         return 0;
 209 }
 210
 211 static int __init spu_map_device(struct spu *spu)
 212 {
 213         struct device_node *np = spu->devnode;
 214         int ret = -ENODEV;
 215
 216         spu->name = of_get_property(np, "name", NULL);
 217         if (!spu->name)
 218                 goto out;
 219
 220         ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
 221                                &spu->local_store_phys);
 222         if (ret) {
 223                 pr_debug("spu_new: failed to map %pOF resource 0\n",
 224                          np);
 225                 goto out;
 226         }
 227         ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
 228                                &spu->problem_phys);
 229         if (ret) {
 230                 pr_debug("spu_new: failed to map %pOF resource 1\n",
 231                          np);
 232                 goto out_unmap;
 233         }
 234         ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
 235         if (ret) {
 236                 pr_debug("spu_new: failed to map %pOF resource 2\n",
 237                          np);
 238                 goto out_unmap;
 239         }
 240         if (!firmware_has_feature(FW_FEATURE_LPAR))
 241                 ret = spu_map_resource(spu, 3,
 242                                (void __iomem**)&spu->priv1, NULL);
 243         if (ret) {
 244                 pr_debug("spu_new: failed to map %pOF resource 3\n",
 245                          np);
 246                 goto out_unmap;
 247         }
 248         pr_debug("spu_new: %pOF maps:\n", np);
 249         pr_debug("  local store   : 0x%016lx -> 0x%p\n",
 250                  spu->local_store_phys, spu->local_store);
 251         pr_debug("  problem state : 0x%016lx -> 0x%p\n",
 252                  spu->problem_phys, spu->problem);
 253         pr_debug("  priv2         :                       0x%p\n", spu->priv2);
 254         pr_debug("  priv1         :                       0x%p\n", spu->priv1);
 255
 256         return 0;
 257
 258 out_unmap:
 259         spu_unmap(spu);
 260 out:
 261         pr_debug("failed to map spe %s: %d\n", spu->name, ret);
 262         return ret;
 263 }
 264
 265 static int __init of_enumerate_spus(int (*fn)(void *data))
 266 {
 267         int ret;
 268         struct device_node *node;
 269         unsigned int n = 0;
 270
 271         ret = -ENODEV;
 272         for_each_node_by_type(node, "spe") {
 273                 ret = fn(node);
 274                 if (ret) {
 275                         printk(KERN_WARNING "%s: Error initializing %pOFn\n",
 276                                 __func__, node);
 277                         of_node_put(node);
 278                         break;
 279                 }
 280                 n++;
 281         }
 282         return ret ? ret : n;
 283 }
 284
 285 static int __init of_create_spu(struct spu *spu, void *data)
 286 {
 287         int ret;
 288         struct device_node *spe = (struct device_node *)data;
 289         static int legacy_map = 0, legacy_irq = 0;
 290
 291         spu->devnode = of_node_get(spe);
 292         spu->spe_id = find_spu_unit_number(spe);
 293
 294         spu->node = of_node_to_nid(spe);
 295         if (spu->node >= MAX_NUMNODES) {
 296                 printk(KERN_WARNING "SPE %pOF on node %d ignored,"
 297                        " node number too big\n", spe, spu->node);
 298                 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
 299                 ret = -ENODEV;
 300                 goto out;
 301         }
 302
 303         ret = spu_map_device(spu);
 304         if (ret) {
 305                 if (!legacy_map) {
 306                         legacy_map = 1;
 307                         printk(KERN_WARNING "%s: Legacy device tree found, "
 308                                 "trying to map old style\n", __func__);
 309                 }
 310                 ret = spu_map_device_old(spu);
 311                 if (ret) {
 312                         printk(KERN_ERR "Unable to map %s\n",
 313                                 spu->name);
 314                         goto out;
 315                 }
 316         }
 317
 318         ret = spu_map_interrupts(spu, spe);
 319         if (ret) {
 320                 if (!legacy_irq) {
 321                         legacy_irq = 1;
 322                         printk(KERN_WARNING "%s: Legacy device tree found, "
 323                                 "trying old style irq\n", __func__);
 324                 }
 325                 ret = spu_map_interrupts_old(spu, spe);
 326                 if (ret) {
 327                         printk(KERN_ERR "%s: could not map interrupts\n",
 328                                 spu->name);
 329                         goto out_unmap;
 330                 }
 331         }
 332
 333         pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
 334                 spu->local_store, spu->problem, spu->priv1,
 335                 spu->priv2, spu->number);
 336         goto out;
 337
 338 out_unmap:
 339         spu_unmap(spu);
 340 out:
 341         return ret;
 342 }
 343
 344 static int of_destroy_spu(struct spu *spu)
 345 {
 346         spu_unmap(spu);
 347         of_node_put(spu->devnode);
 348         return 0;
 349 }
 350
 351 static void enable_spu_by_master_run(struct spu_context *ctx)
 352 {
 353         ctx->ops->master_start(ctx);
 354 }
 355
 356 static void disable_spu_by_master_run(struct spu_context *ctx)
 357 {
 358         ctx->ops->master_stop(ctx);
 359 }
 360
 361 /* Hardcoded affinity idxs for qs20 */
 362 #define QS20_SPES_PER_BE 8
 363 static int qs20_reg_idxs[QS20_SPES_PER_BE] =   { 0, 2, 4, 6, 7, 5, 3, 1 };
 364 static int qs20_reg_memory[QS20_SPES_PER_BE] = { 1, 1, 0, 0, 0, 0, 0, 0 };
 365
 366 static struct spu *__init spu_lookup_reg(int node, u32 reg)
 367 {
 368         struct spu *spu;
 369         const u32 *spu_reg;
 370
 371         list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
 372                 spu_reg = of_get_property(spu_devnode(spu), "reg", NULL);
 373                 if (*spu_reg == reg)
 374                         return spu;
 375         }
 376         return NULL;
 377 }
 378
 379 static void __init init_affinity_qs20_harcoded(void)
 380 {
 381         int node, i;
 382         struct spu *last_spu, *spu;
 383         u32 reg;
 384
 385         for (node = 0; node < MAX_NUMNODES; node++) {
 386                 last_spu = NULL;
 387                 for (i = 0; i < QS20_SPES_PER_BE; i++) {
 388                         reg = qs20_reg_idxs[i];
 389                         spu = spu_lookup_reg(node, reg);
 390                         if (!spu)
 391                                 continue;
 392                         spu->has_mem_affinity = qs20_reg_memory[reg];
 393                         if (last_spu)
 394                                 list_add_tail(&spu->aff_list,
 395                                                 &last_spu->aff_list);
 396                         last_spu = spu;
 397                 }
 398         }
 399 }
 400
 401 static int __init of_has_vicinity(void)
 402 {
 403         struct device_node *dn;
 404
 405         for_each_node_by_type(dn, "spe") {
 406                 if (of_property_present(dn, "vicinity"))  {
 407                         of_node_put(dn);
 408                         return 1;
 409                 }
 410         }
 411         return 0;
 412 }
 413
 414 static struct spu *__init devnode_spu(int cbe, struct device_node *dn)
 415 {
 416         struct spu *spu;
 417
 418         list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list)
 419                 if (spu_devnode(spu) == dn)
 420                         return spu;
 421         return NULL;
 422 }
 423
 424 static struct spu * __init
 425 neighbour_spu(int cbe, struct device_node *target, struct device_node *avoid)
 426 {
 427         struct spu *spu;
 428         struct device_node *spu_dn;
 429         const phandle *vic_handles;
 430         int lenp, i;
 431
 432         list_for_each_entry(spu, &cbe_spu_info[cbe].spus, cbe_list) {
 433                 spu_dn = spu_devnode(spu);
 434                 if (spu_dn == avoid)
 435                         continue;
 436                 vic_handles = of_get_property(spu_dn, "vicinity", &lenp);
 437                 for (i=0; i < (lenp / sizeof(phandle)); i++) {
 438                         if (vic_handles[i] == target->phandle)
 439                                 return spu;
 440                 }
 441         }
 442         return NULL;
 443 }
 444
 445 static void __init init_affinity_node(int cbe)
 446 {
 447         struct spu *spu, *last_spu;
 448         struct device_node *vic_dn, *last_spu_dn;
 449         phandle avoid_ph;
 450         const phandle *vic_handles;
 451         int lenp, i, added;
 452
 453         last_spu = list_first_entry(&cbe_spu_info[cbe].spus, struct spu,
 454                                                                 cbe_list);
 455         avoid_ph = 0;
 456         for (added = 1; added < cbe_spu_info[cbe].n_spus; added++) {
 457                 last_spu_dn = spu_devnode(last_spu);
 458                 vic_handles = of_get_property(last_spu_dn, "vicinity", &lenp);
 459
 460                 /*
 461                  * Walk through each phandle in vicinity property of the spu
 462                  * (typically two vicinity phandles per spe node)
 463                  */
 464                 for (i = 0; i < (lenp / sizeof(phandle)); i++) {
 465                         if (vic_handles[i] == avoid_ph)
 466                                 continue;
 467
 468                         vic_dn = of_find_node_by_phandle(vic_handles[i]);
 469                         if (!vic_dn)
 470                                 continue;
 471
 472                         if (of_node_name_eq(vic_dn, "spe") ) {
 473                                 spu = devnode_spu(cbe, vic_dn);
 474                                 avoid_ph = last_spu_dn->phandle;
 475                         } else {
 476                                 /*
 477                                  * "mic-tm" and "bif0" nodes do not have
 478                                  * vicinity property. So we need to find the
 479                                  * spe which has vic_dn as neighbour, but
 480                                  * skipping the one we came from (last_spu_dn)
 481                                  */
 482                                 spu = neighbour_spu(cbe, vic_dn, last_spu_dn);
 483                                 if (!spu)
 484                                         continue;
 485                                 if (of_node_name_eq(vic_dn, "mic-tm")) {
 486                                         last_spu->has_mem_affinity = 1;
 487                                         spu->has_mem_affinity = 1;
 488                                 }
 489                                 avoid_ph = vic_dn->phandle;
 490                         }
 491
 492                         of_node_put(vic_dn);
 493
 494                         list_add_tail(&spu->aff_list, &last_spu->aff_list);
 495                         last_spu = spu;
 496                         break;
 497                 }
 498         }
 499 }
 500
 501 static void __init init_affinity_fw(void)
 502 {
 503         int cbe;
 504
 505         for (cbe = 0; cbe < MAX_NUMNODES; cbe++)
 506                 init_affinity_node(cbe);
 507 }
 508
 509 static int __init init_affinity(void)
 510 {
 511         if (of_has_vicinity()) {
 512                 init_affinity_fw();
 513         } else {
 514                 if (of_machine_is_compatible("IBM,CPBW-1.0"))
 515                         init_affinity_qs20_harcoded();
 516                 else
 517                         printk("No affinity configuration found\n");
 518         }
 519
 520         return 0;
 521 }
 522
 523 const struct spu_management_ops spu_management_of_ops = {
 524         .enumerate_spus = of_enumerate_spus,
 525         .create_spu = of_create_spu,
 526         .destroy_spu = of_destroy_spu,
 527         .enable_spu = enable_spu_by_master_run,
 528         .disable_spu = disable_spu_by_master_run,
 529         .init_affinity = init_affinity,
 530 };