arch/powerpc/platforms/cell/spu_priv1_mmio.c

   1 /*
   2  * spu hypervisor abstraction for direct hardware access.
   3  *
   4  *  (C) Copyright IBM Deutschland Entwicklung GmbH 2005
   5  *  Copyright 2006 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/interrupt.h>
  22 #include <linux/list.h>
  23 #include <linux/module.h>
  24 #include <linux/ptrace.h>
  25 #include <linux/slab.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 "interrupt.h"
  38 #include "spu_priv1_mmio.h"
  39
  40 static DEFINE_MUTEX(add_spumem_mutex);
  41
  42 struct spu_pdata {
  43         int nid;
  44         struct device_node *devnode;
  45         struct spu_priv1 __iomem *priv1;
  46 };
  47
  48 static struct spu_pdata *spu_get_pdata(struct spu *spu)
  49 {
  50         BUG_ON(!spu->pdata);
  51         return spu->pdata;
  52 }
  53
  54 struct device_node *spu_devnode(struct spu *spu)
  55 {
  56         return spu_get_pdata(spu)->devnode;
  57 }
  58
  59 EXPORT_SYMBOL_GPL(spu_devnode);
  60
  61 static int __init find_spu_node_id(struct device_node *spe)
  62 {
  63         const unsigned int *id;
  64         struct device_node *cpu;
  65         cpu = spe->parent->parent;
  66         id = get_property(cpu, "node-id", NULL);
  67         return id ? *id : 0;
  68 }
  69
  70 static int __init cell_spuprop_present(struct spu *spu, struct device_node *spe,
  71                 const char *prop)
  72 {
  73         const struct address_prop {
  74                 unsigned long address;
  75                 unsigned int len;
  76         } __attribute__((packed)) *p;
  77         int proplen;
  78
  79         unsigned long start_pfn, nr_pages;
  80         struct pglist_data *pgdata;
  81         struct zone *zone;
  82         int ret;
  83
  84         p = get_property(spe, prop, &proplen);
  85         WARN_ON(proplen != sizeof (*p));
  86
  87         start_pfn = p->address >> PAGE_SHIFT;
  88         nr_pages = ((unsigned long)p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
  89
  90         pgdata = NODE_DATA(spu_get_pdata(spu)->nid);
  91         zone = pgdata->node_zones;
  92
  93         /* XXX rethink locking here */
  94         mutex_lock(&add_spumem_mutex);
  95         ret = __add_pages(zone, start_pfn, nr_pages);
  96         mutex_unlock(&add_spumem_mutex);
  97
  98         return ret;
  99 }
 100
 101 static void __iomem * __init map_spe_prop(struct spu *spu,
 102                 struct device_node *n, const char *name)
 103 {
 104         const struct address_prop {
 105                 unsigned long address;
 106                 unsigned int len;
 107         } __attribute__((packed)) *prop;
 108
 109         const void *p;
 110         int proplen;
 111         void __iomem *ret = NULL;
 112         int err = 0;
 113
 114         p = get_property(n, name, &proplen);
 115         if (proplen != sizeof (struct address_prop))
 116                 return NULL;
 117
 118         prop = p;
 119
 120         err = cell_spuprop_present(spu, n, name);
 121         if (err && (err != -EEXIST))
 122                 goto out;
 123
 124         ret = ioremap(prop->address, prop->len);
 125
 126  out:
 127         return ret;
 128 }
 129
 130 static void spu_unmap(struct spu *spu)
 131 {
 132         iounmap(spu->priv2);
 133         iounmap(spu_get_pdata(spu)->priv1);
 134         iounmap(spu->problem);
 135         iounmap((__force u8 __iomem *)spu->local_store);
 136 }
 137
 138 static int __init spu_map_interrupts_old(struct spu *spu,
 139         struct device_node *np)
 140 {
 141         unsigned int isrc;
 142         const u32 *tmp;
 143
 144         /* Get the interrupt source unit from the device-tree */
 145         tmp = get_property(np, "isrc", NULL);
 146         if (!tmp)
 147                 return -ENODEV;
 148         isrc = tmp[0];
 149
 150         /* Add the node number */
 151         isrc |= spu->node << IIC_IRQ_NODE_SHIFT;
 152
 153         /* Now map interrupts of all 3 classes */
 154         spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
 155         spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
 156         spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
 157
 158         /* Right now, we only fail if class 2 failed */
 159         return spu->irqs[2] == NO_IRQ ? -EINVAL : 0;
 160 }
 161
 162 static int __init spu_map_device_old(struct spu *spu, struct device_node *node)
 163 {
 164         const char *prop;
 165         int ret;
 166
 167         ret = -ENODEV;
 168         spu->name = get_property(node, "name", NULL);
 169         if (!spu->name)
 170                 goto out;
 171
 172         prop = get_property(node, "local-store", NULL);
 173         if (!prop)
 174                 goto out;
 175         spu->local_store_phys = *(unsigned long *)prop;
 176
 177         /* we use local store as ram, not io memory */
 178         spu->local_store = (void __force *)
 179                 map_spe_prop(spu, node, "local-store");
 180         if (!spu->local_store)
 181                 goto out;
 182
 183         prop = get_property(node, "problem", NULL);
 184         if (!prop)
 185                 goto out_unmap;
 186         spu->problem_phys = *(unsigned long *)prop;
 187
 188         spu->problem= map_spe_prop(spu, node, "problem");
 189         if (!spu->problem)
 190                 goto out_unmap;
 191
 192         spu_get_pdata(spu)->priv1= map_spe_prop(spu, node, "priv1");
 193
 194         spu->priv2= map_spe_prop(spu, node, "priv2");
 195         if (!spu->priv2)
 196                 goto out_unmap;
 197         ret = 0;
 198         goto out;
 199
 200 out_unmap:
 201         spu_unmap(spu);
 202 out:
 203         return ret;
 204 }
 205
 206 static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
 207 {
 208         struct of_irq oirq;
 209         int ret;
 210         int i;
 211
 212         for (i=0; i < 3; i++) {
 213                 ret = of_irq_map_one(np, i, &oirq);
 214                 if (ret) {
 215                         pr_debug("spu_new: failed to get irq %d\n", i);
 216                         goto err;
 217                 }
 218                 ret = -EINVAL;
 219                 pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
 220                          oirq.controller->full_name);
 221                 spu->irqs[i] = irq_create_of_mapping(oirq.controller,
 222                                         oirq.specifier, oirq.size);
 223                 if (spu->irqs[i] == NO_IRQ) {
 224                         pr_debug("spu_new: failed to map it !\n");
 225                         goto err;
 226                 }
 227         }
 228         return 0;
 229
 230 err:
 231         pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier,
 232                 spu->name);
 233         for (; i >= 0; i--) {
 234                 if (spu->irqs[i] != NO_IRQ)
 235                         irq_dispose_mapping(spu->irqs[i]);
 236         }
 237         return ret;
 238 }
 239
 240 static int spu_map_resource(struct spu *spu, int nr,
 241                             void __iomem** virt, unsigned long *phys)
 242 {
 243         struct device_node *np = spu_get_pdata(spu)->devnode;
 244         unsigned long start_pfn, nr_pages;
 245         struct pglist_data *pgdata;
 246         struct zone *zone;
 247         struct resource resource = { };
 248         unsigned long len;
 249         int ret;
 250
 251         ret = of_address_to_resource(np, nr, &resource);
 252         if (ret)
 253                 goto out;
 254
 255         if (phys)
 256                 *phys = resource.start;
 257         len = resource.end - resource.start + 1;
 258         *virt = ioremap(resource.start, len);
 259         if (!*virt)
 260                 ret = -EINVAL;
 261
 262         start_pfn = resource.start >> PAGE_SHIFT;
 263         nr_pages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
 264
 265         pgdata = NODE_DATA(spu_get_pdata(spu)->nid);
 266         zone = pgdata->node_zones;
 267
 268         /* XXX rethink locking here */
 269         mutex_lock(&add_spumem_mutex);
 270         ret = __add_pages(zone, start_pfn, nr_pages);
 271         mutex_unlock(&add_spumem_mutex);
 272
 273 out:
 274         return ret;
 275 }
 276
 277 static int __init spu_map_device(struct spu *spu)
 278 {
 279         struct device_node *np = spu_get_pdata(spu)->devnode;
 280         int ret = -ENODEV;
 281
 282         spu->name = get_property(np, "name", NULL);
 283         if (!spu->name)
 284                 goto out;
 285
 286         ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
 287                                &spu->local_store_phys);
 288         if (ret) {
 289                 pr_debug("spu_new: failed to map %s resource 0\n",
 290                          np->full_name);
 291                 goto out;
 292         }
 293         ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
 294                                &spu->problem_phys);
 295         if (ret) {
 296                 pr_debug("spu_new: failed to map %s resource 1\n",
 297                          np->full_name);
 298                 goto out_unmap;
 299         }
 300         ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
 301         if (ret) {
 302                 pr_debug("spu_new: failed to map %s resource 2\n",
 303                          np->full_name);
 304                 goto out_unmap;
 305         }
 306         if (!firmware_has_feature(FW_FEATURE_LPAR))
 307                 ret = spu_map_resource(spu, 3,
 308                                (void __iomem**)&spu_get_pdata(spu)->priv1, NULL);
 309         if (ret) {
 310                 pr_debug("spu_new: failed to map %s resource 3\n",
 311                          np->full_name);
 312                 goto out_unmap;
 313         }
 314         pr_debug("spu_new: %s maps:\n", np->full_name);
 315         pr_debug("  local store   : 0x%016lx -> 0x%p\n",
 316                  spu->local_store_phys, spu->local_store);
 317         pr_debug("  problem state : 0x%016lx -> 0x%p\n",
 318                  spu->problem_phys, spu->problem);
 319         pr_debug("  priv2         :                       0x%p\n", spu->priv2);
 320         pr_debug("  priv1         :                       0x%p\n",
 321                  spu_get_pdata(spu)->priv1);
 322
 323         return 0;
 324
 325 out_unmap:
 326         spu_unmap(spu);
 327 out:
 328         pr_debug("failed to map spe %s: %d\n", spu->name, ret);
 329         return ret;
 330 }
 331
 332 static int __init of_enumerate_spus(int (*fn)(void *data))
 333 {
 334         int ret;
 335         struct device_node *node;
 336
 337         ret = -ENODEV;
 338         for (node = of_find_node_by_type(NULL, "spe");
 339                         node; node = of_find_node_by_type(node, "spe")) {
 340                 ret = fn(node);
 341                 if (ret) {
 342                         printk(KERN_WARNING "%s: Error initializing %s\n",
 343                                 __FUNCTION__, node->name);
 344                         break;
 345                 }
 346         }
 347         return ret;
 348 }
 349
 350 static int __init of_create_spu(struct spu *spu, void *data)
 351 {
 352         int ret;
 353         struct device_node *spe = (struct device_node *)data;
 354
 355         spu->pdata = kzalloc(sizeof(struct spu_pdata),
 356                 GFP_KERNEL);
 357         if (!spu->pdata) {
 358                 ret = -ENOMEM;
 359                 goto out;
 360         }
 361         spu_get_pdata(spu)->devnode = of_node_get(spe);
 362
 363         spu->node = find_spu_node_id(spe);
 364         if (spu->node >= MAX_NUMNODES) {
 365                 printk(KERN_WARNING "SPE %s on node %d ignored,"
 366                        " node number too big\n", spe->full_name, spu->node);
 367                 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
 368                 ret = -ENODEV;
 369                 goto out_free;
 370         }
 371
 372         spu_get_pdata(spu)->nid = of_node_to_nid(spe);
 373         if (spu_get_pdata(spu)->nid == -1)
 374                 spu_get_pdata(spu)->nid = 0;
 375
 376         ret = spu_map_device(spu);
 377         /* try old method */
 378         if (ret)
 379                 ret = spu_map_device_old(spu, spe);
 380         if (ret)
 381                 goto out_free;
 382
 383         ret = spu_map_interrupts(spu, spe);
 384         if (ret)
 385                 ret = spu_map_interrupts_old(spu, spe);
 386         if (ret)
 387                 goto out_unmap;
 388
 389         pr_debug(KERN_DEBUG "Using SPE %s %p %p %p %p %d\n", spu->name,
 390                 spu->local_store, spu->problem, spu_get_pdata(spu)->priv1,
 391                 spu->priv2, spu->number);
 392         goto out;
 393
 394 out_unmap:
 395         spu_unmap(spu);
 396 out_free:
 397         kfree(spu->pdata);
 398         spu->pdata = NULL;
 399 out:
 400         return ret;
 401 }
 402
 403 static int of_destroy_spu(struct spu *spu)
 404 {
 405         spu_unmap(spu);
 406         of_node_put(spu_get_pdata(spu)->devnode);
 407         kfree(spu->pdata);
 408         spu->pdata = NULL;
 409         return 0;
 410 }
 411
 412 const struct spu_management_ops spu_management_of_ops = {
 413         .enumerate_spus = of_enumerate_spus,
 414         .create_spu = of_create_spu,
 415         .destroy_spu = of_destroy_spu,
 416 };
 417
 418 static void int_mask_and(struct spu *spu, int class, u64 mask)
 419 {
 420         u64 old_mask;
 421
 422         old_mask = in_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class]);
 423         out_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class],
 424                 old_mask & mask);
 425 }
 426
 427 static void int_mask_or(struct spu *spu, int class, u64 mask)
 428 {
 429         u64 old_mask;
 430
 431         old_mask = in_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class]);
 432         out_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class],
 433                 old_mask | mask);
 434 }
 435
 436 static void int_mask_set(struct spu *spu, int class, u64 mask)
 437 {
 438         out_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class], mask);
 439 }
 440
 441 static u64 int_mask_get(struct spu *spu, int class)
 442 {
 443         return in_be64(&spu_get_pdata(spu)->priv1->int_mask_RW[class]);
 444 }
 445
 446 static void int_stat_clear(struct spu *spu, int class, u64 stat)
 447 {
 448         out_be64(&spu_get_pdata(spu)->priv1->int_stat_RW[class], stat);
 449 }
 450
 451 static u64 int_stat_get(struct spu *spu, int class)
 452 {
 453         return in_be64(&spu_get_pdata(spu)->priv1->int_stat_RW[class]);
 454 }
 455
 456 static void cpu_affinity_set(struct spu *spu, int cpu)
 457 {
 458         u64 target = iic_get_target_id(cpu);
 459         u64 route = target << 48 | target << 32 | target << 16;
 460         out_be64(&spu_get_pdata(spu)->priv1->int_route_RW, route);
 461 }
 462
 463 static u64 mfc_dar_get(struct spu *spu)
 464 {
 465         return in_be64(&spu_get_pdata(spu)->priv1->mfc_dar_RW);
 466 }
 467
 468 static u64 mfc_dsisr_get(struct spu *spu)
 469 {
 470         return in_be64(&spu_get_pdata(spu)->priv1->mfc_dsisr_RW);
 471 }
 472
 473 static void mfc_dsisr_set(struct spu *spu, u64 dsisr)
 474 {
 475         out_be64(&spu_get_pdata(spu)->priv1->mfc_dsisr_RW, dsisr);
 476 }
 477
 478 static void mfc_sdr_setup(struct spu *spu)
 479 {
 480         out_be64(&spu_get_pdata(spu)->priv1->mfc_sdr_RW, mfspr(SPRN_SDR1));
 481 }
 482
 483 static void mfc_sr1_set(struct spu *spu, u64 sr1)
 484 {
 485         out_be64(&spu_get_pdata(spu)->priv1->mfc_sr1_RW, sr1);
 486 }
 487
 488 static u64 mfc_sr1_get(struct spu *spu)
 489 {
 490         return in_be64(&spu_get_pdata(spu)->priv1->mfc_sr1_RW);
 491 }
 492
 493 static void mfc_tclass_id_set(struct spu *spu, u64 tclass_id)
 494 {
 495         out_be64(&spu_get_pdata(spu)->priv1->mfc_tclass_id_RW, tclass_id);
 496 }
 497
 498 static u64 mfc_tclass_id_get(struct spu *spu)
 499 {
 500         return in_be64(&spu_get_pdata(spu)->priv1->mfc_tclass_id_RW);
 501 }
 502
 503 static void tlb_invalidate(struct spu *spu)
 504 {
 505         out_be64(&spu_get_pdata(spu)->priv1->tlb_invalidate_entry_W, 0ul);
 506 }
 507
 508 static void resource_allocation_groupID_set(struct spu *spu, u64 id)
 509 {
 510         out_be64(&spu_get_pdata(spu)->priv1->resource_allocation_groupID_RW,
 511                 id);
 512 }
 513
 514 static u64 resource_allocation_groupID_get(struct spu *spu)
 515 {
 516         return in_be64(
 517                 &spu_get_pdata(spu)->priv1->resource_allocation_groupID_RW);
 518 }
 519
 520 static void resource_allocation_enable_set(struct spu *spu, u64 enable)
 521 {
 522         out_be64(&spu_get_pdata(spu)->priv1->resource_allocation_enable_RW,
 523                 enable);
 524 }
 525
 526 static u64 resource_allocation_enable_get(struct spu *spu)
 527 {
 528         return in_be64(
 529                 &spu_get_pdata(spu)->priv1->resource_allocation_enable_RW);
 530 }
 531
 532 const struct spu_priv1_ops spu_priv1_mmio_ops =
 533 {
 534         .int_mask_and = int_mask_and,
 535         .int_mask_or = int_mask_or,
 536         .int_mask_set = int_mask_set,
 537         .int_mask_get = int_mask_get,
 538         .int_stat_clear = int_stat_clear,
 539         .int_stat_get = int_stat_get,
 540         .cpu_affinity_set = cpu_affinity_set,
 541         .mfc_dar_get = mfc_dar_get,
 542         .mfc_dsisr_get = mfc_dsisr_get,
 543         .mfc_dsisr_set = mfc_dsisr_set,
 544         .mfc_sdr_setup = mfc_sdr_setup,
 545         .mfc_sr1_set = mfc_sr1_set,
 546         .mfc_sr1_get = mfc_sr1_get,
 547         .mfc_tclass_id_set = mfc_tclass_id_set,
 548         .mfc_tclass_id_get = mfc_tclass_id_get,
 549         .tlb_invalidate = tlb_invalidate,
 550         .resource_allocation_groupID_set = resource_allocation_groupID_set,
 551         .resource_allocation_groupID_get = resource_allocation_groupID_get,
 552         .resource_allocation_enable_set = resource_allocation_enable_set,
 553         .resource_allocation_enable_get = resource_allocation_enable_get,
 554 };