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/module.h>
  25 #include <linux/ptrace.h>
  26 #include <linux/slab.h>
  27 #include <linux/wait.h>
  28 #include <linux/mm.h>
  29 #include <linux/io.h>
  30 #include <linux/mutex.h>
  31 #include <linux/device.h>
  32
  33 #include <asm/spu.h>
  34 #include <asm/spu_priv1.h>
  35 #include <asm/firmware.h>
  36 #include <asm/prom.h>
  37
  38 #include "spufs/spufs.h"
  39 #include "interrupt.h"
  40
  41 struct device_node *spu_devnode(struct spu *spu)
  42 {
  43         return spu->devnode;
  44 }
  45
  46 EXPORT_SYMBOL_GPL(spu_devnode);
  47
  48 static u64 __init find_spu_unit_number(struct device_node *spe)
  49 {
  50         const unsigned int *prop;
  51         int proplen;
  52         prop = of_get_property(spe, "unit-id", &proplen);
  53         if (proplen == 4)
  54                 return (u64)*prop;
  55
  56         prop = of_get_property(spe, "reg", &proplen);
  57         if (proplen == 4)
  58                 return (u64)*prop;
  59
  60         return 0;
  61 }
  62
  63 static void spu_unmap(struct spu *spu)
  64 {
  65         if (!firmware_has_feature(FW_FEATURE_LPAR))
  66                 iounmap(spu->priv1);
  67         iounmap(spu->priv2);
  68         iounmap(spu->problem);
  69         iounmap((__force u8 __iomem *)spu->local_store);
  70 }
  71
  72 static int __init spu_map_interrupts_old(struct spu *spu,
  73         struct device_node *np)
  74 {
  75         unsigned int isrc;
  76         const u32 *tmp;
  77         int nid;
  78
  79         /* Get the interrupt source unit from the device-tree */
  80         tmp = of_get_property(np, "isrc", NULL);
  81         if (!tmp)
  82                 return -ENODEV;
  83         isrc = tmp[0];
  84
  85         tmp = of_get_property(np->parent->parent, "node-id", NULL);
  86         if (!tmp) {
  87                 printk(KERN_WARNING "%s: can't find node-id\n", __FUNCTION__);
  88                 nid = spu->node;
  89         } else
  90                 nid = tmp[0];
  91
  92         /* Add the node number */
  93         isrc |= nid << IIC_IRQ_NODE_SHIFT;
  94
  95         /* Now map interrupts of all 3 classes */
  96         spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
  97         spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
  98         spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
  99
 100         /* Right now, we only fail if class 2 failed */
 101         return spu->irqs[2] == NO_IRQ ? -EINVAL : 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         struct of_irq oirq;
 174         int ret;
 175         int i;
 176
 177         for (i=0; i < 3; i++) {
 178                 ret = of_irq_map_one(np, i, &oirq);
 179                 if (ret) {
 180                         pr_debug("spu_new: failed to get irq %d\n", i);
 181                         goto err;
 182                 }
 183                 ret = -EINVAL;
 184                 pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
 185                          oirq.controller->full_name);
 186                 spu->irqs[i] = irq_create_of_mapping(oirq.controller,
 187                                         oirq.specifier, oirq.size);
 188                 if (spu->irqs[i] == NO_IRQ) {
 189                         pr_debug("spu_new: failed to map it !\n");
 190                         goto err;
 191                 }
 192         }
 193         return 0;
 194
 195 err:
 196         pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier,
 197                 spu->name);
 198         for (; i >= 0; i--) {
 199                 if (spu->irqs[i] != NO_IRQ)
 200                         irq_dispose_mapping(spu->irqs[i]);
 201         }
 202         return ret;
 203 }
 204
 205 static int spu_map_resource(struct spu *spu, int nr,
 206                             void __iomem** virt, unsigned long *phys)
 207 {
 208         struct device_node *np = spu->devnode;
 209         struct resource resource = { };
 210         unsigned long len;
 211         int ret;
 212
 213         ret = of_address_to_resource(np, nr, &resource);
 214         if (ret)
 215                 return ret;
 216         if (phys)
 217                 *phys = resource.start;
 218         len = resource.end - resource.start + 1;
 219         *virt = ioremap(resource.start, len);
 220         if (!*virt)
 221                 return -EINVAL;
 222         return 0;
 223 }
 224
 225 static int __init spu_map_device(struct spu *spu)
 226 {
 227         struct device_node *np = spu->devnode;
 228         int ret = -ENODEV;
 229
 230         spu->name = of_get_property(np, "name", NULL);
 231         if (!spu->name)
 232                 goto out;
 233
 234         ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
 235                                &spu->local_store_phys);
 236         if (ret) {
 237                 pr_debug("spu_new: failed to map %s resource 0\n",
 238                          np->full_name);
 239                 goto out;
 240         }
 241         ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
 242                                &spu->problem_phys);
 243         if (ret) {
 244                 pr_debug("spu_new: failed to map %s resource 1\n",
 245                          np->full_name);
 246                 goto out_unmap;
 247         }
 248         ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
 249         if (ret) {
 250                 pr_debug("spu_new: failed to map %s resource 2\n",
 251                          np->full_name);
 252                 goto out_unmap;
 253         }
 254         if (!firmware_has_feature(FW_FEATURE_LPAR))
 255                 ret = spu_map_resource(spu, 3,
 256                                (void __iomem**)&spu->priv1, NULL);
 257         if (ret) {
 258                 pr_debug("spu_new: failed to map %s resource 3\n",
 259                          np->full_name);
 260                 goto out_unmap;
 261         }
 262         pr_debug("spu_new: %s maps:\n", np->full_name);
 263         pr_debug("  local store   : 0x%016lx -> 0x%p\n",
 264                  spu->local_store_phys, spu->local_store);
 265         pr_debug("  problem state : 0x%016lx -> 0x%p\n",
 266                  spu->problem_phys, spu->problem);
 267         pr_debug("  priv2         :                       0x%p\n", spu->priv2);
 268         pr_debug("  priv1         :                       0x%p\n", spu->priv1);
 269
 270         return 0;
 271
 272 out_unmap:
 273         spu_unmap(spu);
 274 out:
 275         pr_debug("failed to map spe %s: %d\n", spu->name, ret);
 276         return ret;
 277 }
 278
 279 static int __init of_enumerate_spus(int (*fn)(void *data))
 280 {
 281         int ret;
 282         struct device_node *node;
 283
 284         ret = -ENODEV;
 285         for (node = of_find_node_by_type(NULL, "spe");
 286                         node; node = of_find_node_by_type(node, "spe")) {
 287                 ret = fn(node);
 288                 if (ret) {
 289                         printk(KERN_WARNING "%s: Error initializing %s\n",
 290                                 __FUNCTION__, node->name);
 291                         break;
 292                 }
 293         }
 294         return ret;
 295 }
 296
 297 static int __init of_create_spu(struct spu *spu, void *data)
 298 {
 299         int ret;
 300         struct device_node *spe = (struct device_node *)data;
 301         static int legacy_map = 0, legacy_irq = 0;
 302
 303         spu->devnode = of_node_get(spe);
 304         spu->spe_id = find_spu_unit_number(spe);
 305
 306         spu->node = of_node_to_nid(spe);
 307         if (spu->node >= MAX_NUMNODES) {
 308                 printk(KERN_WARNING "SPE %s on node %d ignored,"
 309                        " node number too big\n", spe->full_name, spu->node);
 310                 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
 311                 ret = -ENODEV;
 312                 goto out;
 313         }
 314
 315         ret = spu_map_device(spu);
 316         if (ret) {
 317                 if (!legacy_map) {
 318                         legacy_map = 1;
 319                         printk(KERN_WARNING "%s: Legacy device tree found, "
 320                                 "trying to map old style\n", __FUNCTION__);
 321                 }
 322                 ret = spu_map_device_old(spu);
 323                 if (ret) {
 324                         printk(KERN_ERR "Unable to map %s\n",
 325                                 spu->name);
 326                         goto out;
 327                 }
 328         }
 329
 330         ret = spu_map_interrupts(spu, spe);
 331         if (ret) {
 332                 if (!legacy_irq) {
 333                         legacy_irq = 1;
 334                         printk(KERN_WARNING "%s: Legacy device tree found, "
 335                                 "trying old style irq\n", __FUNCTION__);
 336                 }
 337                 ret = spu_map_interrupts_old(spu, spe);
 338                 if (ret) {
 339                         printk(KERN_ERR "%s: could not map interrupts",
 340                                 spu->name);
 341                         goto out_unmap;
 342                 }
 343         }
 344
 345         pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
 346                 spu->local_store, spu->problem, spu->priv1,
 347                 spu->priv2, spu->number);
 348         goto out;
 349
 350 out_unmap:
 351         spu_unmap(spu);
 352 out:
 353         return ret;
 354 }
 355
 356 static int of_destroy_spu(struct spu *spu)
 357 {
 358         spu_unmap(spu);
 359         of_node_put(spu->devnode);
 360         return 0;
 361 }
 362
 363 static int enable_spu_by_master_run(struct spu_context *ctx)
 364 {
 365         ctx->ops->master_start(ctx);
 366         return 0;
 367 }
 368
 369 static int disable_spu_by_master_run(struct spu_context *ctx)
 370 {
 371         ctx->ops->master_stop(ctx);
 372         return 0;
 373 }
 374
 375 const struct spu_management_ops spu_management_of_ops = {
 376         .enumerate_spus = of_enumerate_spus,
 377         .create_spu = of_create_spu,
 378         .destroy_spu = of_destroy_spu,
 379         .enable_spu = enable_spu_by_master_run,
 380         .disable_spu = disable_spu_by_master_run,
 381 };