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