release/src-rt-6.x/linux/linux-2.6/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 "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         prop = of_get_property(spe, "unit-id", &proplen);
  52         if (proplen == 4)
  53                 return (u64)*prop;
  54
  55         prop = of_get_property(spe, "reg", &proplen);
  56         if (proplen == 4)
  57                 return (u64)*prop;
  58
  59         return 0;
  60 }
  61
  62 static void spu_unmap(struct spu *spu)
  63 {
  64         if (!firmware_has_feature(FW_FEATURE_LPAR))
  65                 iounmap(spu->priv1);
  66         iounmap(spu->priv2);
  67         iounmap(spu->problem);
  68         iounmap((__force u8 __iomem *)spu->local_store);
  69 }
  70
  71 static int __init spu_map_interrupts_old(struct spu *spu,
  72         struct device_node *np)
  73 {
  74         unsigned int isrc;
  75         const u32 *tmp;
  76         int nid;
  77
  78         /* Get the interrupt source unit from the device-tree */
  79         tmp = of_get_property(np, "isrc", NULL);
  80         if (!tmp)
  81                 return -ENODEV;
  82         isrc = tmp[0];
  83
  84         tmp = of_get_property(np->parent->parent, "node-id", NULL);
  85         if (!tmp) {
  86                 printk(KERN_WARNING "%s: can't find node-id\n", __FUNCTION__);
  87                 nid = spu->node;
  88         } else
  89                 nid = tmp[0];
  90
  91         /* Add the node number */
  92         isrc |= nid << IIC_IRQ_NODE_SHIFT;
  93
  94         /* Now map interrupts of all 3 classes */
  95         spu->irqs[0] = irq_create_mapping(NULL, IIC_IRQ_CLASS_0 | isrc);
  96         spu->irqs[1] = irq_create_mapping(NULL, IIC_IRQ_CLASS_1 | isrc);
  97         spu->irqs[2] = irq_create_mapping(NULL, IIC_IRQ_CLASS_2 | isrc);
  98
  99         /* Right now, we only fail if class 2 failed */
 100         return spu->irqs[2] == NO_IRQ ? -EINVAL : 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         struct of_irq oirq;
 173         int ret;
 174         int i;
 175
 176         for (i=0; i < 3; i++) {
 177                 ret = of_irq_map_one(np, i, &oirq);
 178                 if (ret) {
 179                         pr_debug("spu_new: failed to get irq %d\n", i);
 180                         goto err;
 181                 }
 182                 ret = -EINVAL;
 183                 pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
 184                          oirq.controller->full_name);
 185                 spu->irqs[i] = irq_create_of_mapping(oirq.controller,
 186                                         oirq.specifier, oirq.size);
 187                 if (spu->irqs[i] == NO_IRQ) {
 188                         pr_debug("spu_new: failed to map it !\n");
 189                         goto err;
 190                 }
 191         }
 192         return 0;
 193
 194 err:
 195         pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier,
 196                 spu->name);
 197         for (; i >= 0; i--) {
 198                 if (spu->irqs[i] != NO_IRQ)
 199                         irq_dispose_mapping(spu->irqs[i]);
 200         }
 201         return ret;
 202 }
 203
 204 static int spu_map_resource(struct spu *spu, int nr,
 205                             void __iomem** virt, unsigned long *phys)
 206 {
 207         struct device_node *np = spu->devnode;
 208         struct resource resource = { };
 209         unsigned long len;
 210         int ret;
 211
 212         ret = of_address_to_resource(np, nr, &resource);
 213         if (ret)
 214                 return ret;
 215         if (phys)
 216                 *phys = resource.start;
 217         len = resource.end - resource.start + 1;
 218         *virt = ioremap(resource.start, len);
 219         if (!*virt)
 220                 return -EINVAL;
 221         return 0;
 222 }
 223
 224 static int __init spu_map_device(struct spu *spu)
 225 {
 226         struct device_node *np = spu->devnode;
 227         int ret = -ENODEV;
 228
 229         spu->name = of_get_property(np, "name", NULL);
 230         if (!spu->name)
 231                 goto out;
 232
 233         ret = spu_map_resource(spu, 0, (void __iomem**)&spu->local_store,
 234                                &spu->local_store_phys);
 235         if (ret) {
 236                 pr_debug("spu_new: failed to map %s resource 0\n",
 237                          np->full_name);
 238                 goto out;
 239         }
 240         ret = spu_map_resource(spu, 1, (void __iomem**)&spu->problem,
 241                                &spu->problem_phys);
 242         if (ret) {
 243                 pr_debug("spu_new: failed to map %s resource 1\n",
 244                          np->full_name);
 245                 goto out_unmap;
 246         }
 247         ret = spu_map_resource(spu, 2, (void __iomem**)&spu->priv2, NULL);
 248         if (ret) {
 249                 pr_debug("spu_new: failed to map %s resource 2\n",
 250                          np->full_name);
 251                 goto out_unmap;
 252         }
 253         if (!firmware_has_feature(FW_FEATURE_LPAR))
 254                 ret = spu_map_resource(spu, 3,
 255                                (void __iomem**)&spu->priv1, NULL);
 256         if (ret) {
 257                 pr_debug("spu_new: failed to map %s resource 3\n",
 258                          np->full_name);
 259                 goto out_unmap;
 260         }
 261         pr_debug("spu_new: %s maps:\n", np->full_name);
 262         pr_debug("  local store   : 0x%016lx -> 0x%p\n",
 263                  spu->local_store_phys, spu->local_store);
 264         pr_debug("  problem state : 0x%016lx -> 0x%p\n",
 265                  spu->problem_phys, spu->problem);
 266         pr_debug("  priv2         :                       0x%p\n", spu->priv2);
 267         pr_debug("  priv1         :                       0x%p\n", spu->priv1);
 268
 269         return 0;
 270
 271 out_unmap:
 272         spu_unmap(spu);
 273 out:
 274         pr_debug("failed to map spe %s: %d\n", spu->name, ret);
 275         return ret;
 276 }
 277
 278 static int __init of_enumerate_spus(int (*fn)(void *data))
 279 {
 280         int ret;
 281         struct device_node *node;
 282
 283         ret = -ENODEV;
 284         for (node = of_find_node_by_type(NULL, "spe");
 285                         node; node = of_find_node_by_type(node, "spe")) {
 286                 ret = fn(node);
 287                 if (ret) {
 288                         printk(KERN_WARNING "%s: Error initializing %s\n",
 289                                 __FUNCTION__, node->name);
 290                         break;
 291                 }
 292         }
 293         return ret;
 294 }
 295
 296 static int __init of_create_spu(struct spu *spu, void *data)
 297 {
 298         int ret;
 299         struct device_node *spe = (struct device_node *)data;
 300         static int legacy_map = 0, legacy_irq = 0;
 301
 302         spu->devnode = of_node_get(spe);
 303         spu->spe_id = find_spu_unit_number(spe);
 304
 305         spu->node = of_node_to_nid(spe);
 306         if (spu->node >= MAX_NUMNODES) {
 307                 printk(KERN_WARNING "SPE %s on node %d ignored,"
 308                        " node number too big\n", spe->full_name, spu->node);
 309                 printk(KERN_WARNING "Check if CONFIG_NUMA is enabled.\n");
 310                 ret = -ENODEV;
 311                 goto out;
 312         }
 313
 314         ret = spu_map_device(spu);
 315         if (ret) {
 316                 if (!legacy_map) {
 317                         legacy_map = 1;
 318                         printk(KERN_WARNING "%s: Legacy device tree found, "
 319                                 "trying to map old style\n", __FUNCTION__);
 320                 }
 321                 ret = spu_map_device_old(spu);
 322                 if (ret) {
 323                         printk(KERN_ERR "Unable to map %s\n",
 324                                 spu->name);
 325                         goto out;
 326                 }
 327         }
 328
 329         ret = spu_map_interrupts(spu, spe);
 330         if (ret) {
 331                 if (!legacy_irq) {
 332                         legacy_irq = 1;
 333                         printk(KERN_WARNING "%s: Legacy device tree found, "
 334                                 "trying old style irq\n", __FUNCTION__);
 335                 }
 336                 ret = spu_map_interrupts_old(spu, spe);
 337                 if (ret) {
 338                         printk(KERN_ERR "%s: could not map interrupts",
 339                                 spu->name);
 340                         goto out_unmap;
 341                 }
 342         }
 343
 344         pr_debug("Using SPE %s %p %p %p %p %d\n", spu->name,
 345                 spu->local_store, spu->problem, spu->priv1,
 346                 spu->priv2, spu->number);
 347         goto out;
 348
 349 out_unmap:
 350         spu_unmap(spu);
 351 out:
 352         return ret;
 353 }
 354
 355 static int of_destroy_spu(struct spu *spu)
 356 {
 357         spu_unmap(spu);
 358         of_node_put(spu->devnode);
 359         return 0;
 360 }
 361
 362 const struct spu_management_ops spu_management_of_ops = {
 363         .enumerate_spus = of_enumerate_spus,
 364         .create_spu = of_create_spu,
 365         .destroy_spu = of_destroy_spu,
 366 };