arch/powerpc/platforms/powernv/pci.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Support PCI/PCIe on PowerNV platforms
   4  *
   5  * Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/pci.h>
  10 #include <linux/delay.h>
  11 #include <linux/string.h>
  12 #include <linux/init.h>
  13 #include <linux/irq.h>
  14 #include <linux/io.h>
  15 #include <linux/msi.h>
  16 #include <linux/iommu.h>
  17 #include <linux/sched/mm.h>
  18
  19 #include <asm/sections.h>
  20 #include <asm/io.h>
  21 #include <asm/prom.h>
  22 #include <asm/pci-bridge.h>
  23 #include <asm/machdep.h>
  24 #include <asm/msi_bitmap.h>
  25 #include <asm/ppc-pci.h>
  26 #include <asm/pnv-pci.h>
  27 #include <asm/opal.h>
  28 #include <asm/iommu.h>
  29 #include <asm/tce.h>
  30 #include <asm/firmware.h>
  31 #include <asm/eeh_event.h>
  32 #include <asm/eeh.h>
  33
  34 #include "powernv.h"
  35 #include "pci.h"
  36
  37 static DEFINE_MUTEX(tunnel_mutex);
  38
  39 int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id)
  40 {
  41         struct device_node *node = np;
  42         u32 bdfn;
  43         u64 phbid;
  44         int ret;
  45
  46         ret = of_property_read_u32(np, "reg", &bdfn);
  47         if (ret)
  48                 return -ENXIO;
  49
  50         bdfn = ((bdfn & 0x00ffff00) >> 8);
  51         for (node = np; node; node = of_get_parent(node)) {
  52                 if (!PCI_DN(node)) {
  53                         of_node_put(node);
  54                         break;
  55                 }
  56
  57                 if (!of_device_is_compatible(node, "ibm,ioda2-phb") &&
  58                     !of_device_is_compatible(node, "ibm,ioda3-phb") &&
  59                     !of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb")) {
  60                         of_node_put(node);
  61                         continue;
  62                 }
  63
  64                 ret = of_property_read_u64(node, "ibm,opal-phbid", &phbid);
  65                 if (ret) {
  66                         of_node_put(node);
  67                         return -ENXIO;
  68                 }
  69
  70                 if (of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb"))
  71                         *id = PCI_PHB_SLOT_ID(phbid);
  72                 else
  73                         *id = PCI_SLOT_ID(phbid, bdfn);
  74                 return 0;
  75         }
  76
  77         return -ENODEV;
  78 }
  79 EXPORT_SYMBOL_GPL(pnv_pci_get_slot_id);
  80
  81 int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len)
  82 {
  83         int64_t rc;
  84
  85         if (!opal_check_token(OPAL_GET_DEVICE_TREE))
  86                 return -ENXIO;
  87
  88         rc = opal_get_device_tree(phandle, (uint64_t)buf, len);
  89         if (rc < OPAL_SUCCESS)
  90                 return -EIO;
  91
  92         return rc;
  93 }
  94 EXPORT_SYMBOL_GPL(pnv_pci_get_device_tree);
  95
  96 int pnv_pci_get_presence_state(uint64_t id, uint8_t *state)
  97 {
  98         int64_t rc;
  99
 100         if (!opal_check_token(OPAL_PCI_GET_PRESENCE_STATE))
 101                 return -ENXIO;
 102
 103         rc = opal_pci_get_presence_state(id, (uint64_t)state);
 104         if (rc != OPAL_SUCCESS)
 105                 return -EIO;
 106
 107         return 0;
 108 }
 109 EXPORT_SYMBOL_GPL(pnv_pci_get_presence_state);
 110
 111 int pnv_pci_get_power_state(uint64_t id, uint8_t *state)
 112 {
 113         int64_t rc;
 114
 115         if (!opal_check_token(OPAL_PCI_GET_POWER_STATE))
 116                 return -ENXIO;
 117
 118         rc = opal_pci_get_power_state(id, (uint64_t)state);
 119         if (rc != OPAL_SUCCESS)
 120                 return -EIO;
 121
 122         return 0;
 123 }
 124 EXPORT_SYMBOL_GPL(pnv_pci_get_power_state);
 125
 126 int pnv_pci_set_power_state(uint64_t id, uint8_t state, struct opal_msg *msg)
 127 {
 128         struct opal_msg m;
 129         int token, ret;
 130         int64_t rc;
 131
 132         if (!opal_check_token(OPAL_PCI_SET_POWER_STATE))
 133                 return -ENXIO;
 134
 135         token = opal_async_get_token_interruptible();
 136         if (unlikely(token < 0))
 137                 return token;
 138
 139         rc = opal_pci_set_power_state(token, id, (uint64_t)&state);
 140         if (rc == OPAL_SUCCESS) {
 141                 ret = 0;
 142                 goto exit;
 143         } else if (rc != OPAL_ASYNC_COMPLETION) {
 144                 ret = -EIO;
 145                 goto exit;
 146         }
 147
 148         ret = opal_async_wait_response(token, &m);
 149         if (ret < 0)
 150                 goto exit;
 151
 152         if (msg) {
 153                 ret = 1;
 154                 memcpy(msg, &m, sizeof(m));
 155         }
 156
 157 exit:
 158         opal_async_release_token(token);
 159         return ret;
 160 }
 161 EXPORT_SYMBOL_GPL(pnv_pci_set_power_state);
 162
 163 int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 164 {
 165         struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
 166         struct msi_desc *entry;
 167         struct msi_msg msg;
 168         int hwirq;
 169         unsigned int virq;
 170         int rc;
 171
 172         if (WARN_ON(!phb) || !phb->msi_bmp.bitmap)
 173                 return -ENODEV;
 174
 175         if (pdev->no_64bit_msi && !phb->msi32_support)
 176                 return -ENODEV;
 177
 178         for_each_pci_msi_entry(entry, pdev) {
 179                 if (!entry->msi_attrib.is_64 && !phb->msi32_support) {
 180                         pr_warn("%s: Supports only 64-bit MSIs\n",
 181                                 pci_name(pdev));
 182                         return -ENXIO;
 183                 }
 184                 hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, 1);
 185                 if (hwirq < 0) {
 186                         pr_warn("%s: Failed to find a free MSI\n",
 187                                 pci_name(pdev));
 188                         return -ENOSPC;
 189                 }
 190                 virq = irq_create_mapping(NULL, phb->msi_base + hwirq);
 191                 if (!virq) {
 192                         pr_warn("%s: Failed to map MSI to linux irq\n",
 193                                 pci_name(pdev));
 194                         msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, 1);
 195                         return -ENOMEM;
 196                 }
 197                 rc = phb->msi_setup(phb, pdev, phb->msi_base + hwirq,
 198                                     virq, entry->msi_attrib.is_64, &msg);
 199                 if (rc) {
 200                         pr_warn("%s: Failed to setup MSI\n", pci_name(pdev));
 201                         irq_dispose_mapping(virq);
 202                         msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, 1);
 203                         return rc;
 204                 }
 205                 irq_set_msi_desc(virq, entry);
 206                 pci_write_msi_msg(virq, &msg);
 207         }
 208         return 0;
 209 }
 210
 211 void pnv_teardown_msi_irqs(struct pci_dev *pdev)
 212 {
 213         struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
 214         struct msi_desc *entry;
 215         irq_hw_number_t hwirq;
 216
 217         if (WARN_ON(!phb))
 218                 return;
 219
 220         for_each_pci_msi_entry(entry, pdev) {
 221                 if (!entry->irq)
 222                         continue;
 223                 hwirq = virq_to_hw(entry->irq);
 224                 irq_set_msi_desc(entry->irq, NULL);
 225                 irq_dispose_mapping(entry->irq);
 226                 msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, 1);
 227         }
 228 }
 229
 230 /* Nicely print the contents of the PE State Tables (PEST). */
 231 static void pnv_pci_dump_pest(__be64 pestA[], __be64 pestB[], int pest_size)
 232 {
 233         __be64 prevA = ULONG_MAX, prevB = ULONG_MAX;
 234         bool dup = false;
 235         int i;
 236
 237         for (i = 0; i < pest_size; i++) {
 238                 __be64 peA = be64_to_cpu(pestA[i]);
 239                 __be64 peB = be64_to_cpu(pestB[i]);
 240
 241                 if (peA != prevA || peB != prevB) {
 242                         if (dup) {
 243                                 pr_info("PE[..%03x] A/B: as above\n", i-1);
 244                                 dup = false;
 245                         }
 246                         prevA = peA;
 247                         prevB = peB;
 248                         if (peA & PNV_IODA_STOPPED_STATE ||
 249                             peB & PNV_IODA_STOPPED_STATE)
 250                                 pr_info("PE[%03x] A/B: %016llx %016llx\n",
 251                                         i, peA, peB);
 252                 } else if (!dup && (peA & PNV_IODA_STOPPED_STATE ||
 253                                     peB & PNV_IODA_STOPPED_STATE)) {
 254                         dup = true;
 255                 }
 256         }
 257 }
 258
 259 static void pnv_pci_dump_p7ioc_diag_data(struct pci_controller *hose,
 260                                          struct OpalIoPhbErrorCommon *common)
 261 {
 262         struct OpalIoP7IOCPhbErrorData *data;
 263
 264         data = (struct OpalIoP7IOCPhbErrorData *)common;
 265         pr_info("P7IOC PHB#%x Diag-data (Version: %d)\n",
 266                 hose->global_number, be32_to_cpu(common->version));
 267
 268         if (data->brdgCtl)
 269                 pr_info("brdgCtl:     %08x\n",
 270                         be32_to_cpu(data->brdgCtl));
 271         if (data->portStatusReg || data->rootCmplxStatus ||
 272             data->busAgentStatus)
 273                 pr_info("UtlSts:      %08x %08x %08x\n",
 274                         be32_to_cpu(data->portStatusReg),
 275                         be32_to_cpu(data->rootCmplxStatus),
 276                         be32_to_cpu(data->busAgentStatus));
 277         if (data->deviceStatus || data->slotStatus   ||
 278             data->linkStatus   || data->devCmdStatus ||
 279             data->devSecStatus)
 280                 pr_info("RootSts:     %08x %08x %08x %08x %08x\n",
 281                         be32_to_cpu(data->deviceStatus),
 282                         be32_to_cpu(data->slotStatus),
 283                         be32_to_cpu(data->linkStatus),
 284                         be32_to_cpu(data->devCmdStatus),
 285                         be32_to_cpu(data->devSecStatus));
 286         if (data->rootErrorStatus   || data->uncorrErrorStatus ||
 287             data->corrErrorStatus)
 288                 pr_info("RootErrSts:  %08x %08x %08x\n",
 289                         be32_to_cpu(data->rootErrorStatus),
 290                         be32_to_cpu(data->uncorrErrorStatus),
 291                         be32_to_cpu(data->corrErrorStatus));
 292         if (data->tlpHdr1 || data->tlpHdr2 ||
 293             data->tlpHdr3 || data->tlpHdr4)
 294                 pr_info("RootErrLog:  %08x %08x %08x %08x\n",
 295                         be32_to_cpu(data->tlpHdr1),
 296                         be32_to_cpu(data->tlpHdr2),
 297                         be32_to_cpu(data->tlpHdr3),
 298                         be32_to_cpu(data->tlpHdr4));
 299         if (data->sourceId || data->errorClass ||
 300             data->correlator)
 301                 pr_info("RootErrLog1: %08x %016llx %016llx\n",
 302                         be32_to_cpu(data->sourceId),
 303                         be64_to_cpu(data->errorClass),
 304                         be64_to_cpu(data->correlator));
 305         if (data->p7iocPlssr || data->p7iocCsr)
 306                 pr_info("PhbSts:      %016llx %016llx\n",
 307                         be64_to_cpu(data->p7iocPlssr),
 308                         be64_to_cpu(data->p7iocCsr));
 309         if (data->lemFir)
 310                 pr_info("Lem:         %016llx %016llx %016llx\n",
 311                         be64_to_cpu(data->lemFir),
 312                         be64_to_cpu(data->lemErrorMask),
 313                         be64_to_cpu(data->lemWOF));
 314         if (data->phbErrorStatus)
 315                 pr_info("PhbErr:      %016llx %016llx %016llx %016llx\n",
 316                         be64_to_cpu(data->phbErrorStatus),
 317                         be64_to_cpu(data->phbFirstErrorStatus),
 318                         be64_to_cpu(data->phbErrorLog0),
 319                         be64_to_cpu(data->phbErrorLog1));
 320         if (data->mmioErrorStatus)
 321                 pr_info("OutErr:      %016llx %016llx %016llx %016llx\n",
 322                         be64_to_cpu(data->mmioErrorStatus),
 323                         be64_to_cpu(data->mmioFirstErrorStatus),
 324                         be64_to_cpu(data->mmioErrorLog0),
 325                         be64_to_cpu(data->mmioErrorLog1));
 326         if (data->dma0ErrorStatus)
 327                 pr_info("InAErr:      %016llx %016llx %016llx %016llx\n",
 328                         be64_to_cpu(data->dma0ErrorStatus),
 329                         be64_to_cpu(data->dma0FirstErrorStatus),
 330                         be64_to_cpu(data->dma0ErrorLog0),
 331                         be64_to_cpu(data->dma0ErrorLog1));
 332         if (data->dma1ErrorStatus)
 333                 pr_info("InBErr:      %016llx %016llx %016llx %016llx\n",
 334                         be64_to_cpu(data->dma1ErrorStatus),
 335                         be64_to_cpu(data->dma1FirstErrorStatus),
 336                         be64_to_cpu(data->dma1ErrorLog0),
 337                         be64_to_cpu(data->dma1ErrorLog1));
 338
 339         pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_P7IOC_NUM_PEST_REGS);
 340 }
 341
 342 static void pnv_pci_dump_phb3_diag_data(struct pci_controller *hose,
 343                                         struct OpalIoPhbErrorCommon *common)
 344 {
 345         struct OpalIoPhb3ErrorData *data;
 346
 347         data = (struct OpalIoPhb3ErrorData*)common;
 348         pr_info("PHB3 PHB#%x Diag-data (Version: %d)\n",
 349                 hose->global_number, be32_to_cpu(common->version));
 350         if (data->brdgCtl)
 351                 pr_info("brdgCtl:     %08x\n",
 352                         be32_to_cpu(data->brdgCtl));
 353         if (data->portStatusReg || data->rootCmplxStatus ||
 354             data->busAgentStatus)
 355                 pr_info("UtlSts:      %08x %08x %08x\n",
 356                         be32_to_cpu(data->portStatusReg),
 357                         be32_to_cpu(data->rootCmplxStatus),
 358                         be32_to_cpu(data->busAgentStatus));
 359         if (data->deviceStatus || data->slotStatus   ||
 360             data->linkStatus   || data->devCmdStatus ||
 361             data->devSecStatus)
 362                 pr_info("RootSts:     %08x %08x %08x %08x %08x\n",
 363                         be32_to_cpu(data->deviceStatus),
 364                         be32_to_cpu(data->slotStatus),
 365                         be32_to_cpu(data->linkStatus),
 366                         be32_to_cpu(data->devCmdStatus),
 367                         be32_to_cpu(data->devSecStatus));
 368         if (data->rootErrorStatus || data->uncorrErrorStatus ||
 369             data->corrErrorStatus)
 370                 pr_info("RootErrSts:  %08x %08x %08x\n",
 371                         be32_to_cpu(data->rootErrorStatus),
 372                         be32_to_cpu(data->uncorrErrorStatus),
 373                         be32_to_cpu(data->corrErrorStatus));
 374         if (data->tlpHdr1 || data->tlpHdr2 ||
 375             data->tlpHdr3 || data->tlpHdr4)
 376                 pr_info("RootErrLog:  %08x %08x %08x %08x\n",
 377                         be32_to_cpu(data->tlpHdr1),
 378                         be32_to_cpu(data->tlpHdr2),
 379                         be32_to_cpu(data->tlpHdr3),
 380                         be32_to_cpu(data->tlpHdr4));
 381         if (data->sourceId || data->errorClass ||
 382             data->correlator)
 383                 pr_info("RootErrLog1: %08x %016llx %016llx\n",
 384                         be32_to_cpu(data->sourceId),
 385                         be64_to_cpu(data->errorClass),
 386                         be64_to_cpu(data->correlator));
 387         if (data->nFir)
 388                 pr_info("nFir:        %016llx %016llx %016llx\n",
 389                         be64_to_cpu(data->nFir),
 390                         be64_to_cpu(data->nFirMask),
 391                         be64_to_cpu(data->nFirWOF));
 392         if (data->phbPlssr || data->phbCsr)
 393                 pr_info("PhbSts:      %016llx %016llx\n",
 394                         be64_to_cpu(data->phbPlssr),
 395                         be64_to_cpu(data->phbCsr));
 396         if (data->lemFir)
 397                 pr_info("Lem:         %016llx %016llx %016llx\n",
 398                         be64_to_cpu(data->lemFir),
 399                         be64_to_cpu(data->lemErrorMask),
 400                         be64_to_cpu(data->lemWOF));
 401         if (data->phbErrorStatus)
 402                 pr_info("PhbErr:      %016llx %016llx %016llx %016llx\n",
 403                         be64_to_cpu(data->phbErrorStatus),
 404                         be64_to_cpu(data->phbFirstErrorStatus),
 405                         be64_to_cpu(data->phbErrorLog0),
 406                         be64_to_cpu(data->phbErrorLog1));
 407         if (data->mmioErrorStatus)
 408                 pr_info("OutErr:      %016llx %016llx %016llx %016llx\n",
 409                         be64_to_cpu(data->mmioErrorStatus),
 410                         be64_to_cpu(data->mmioFirstErrorStatus),
 411                         be64_to_cpu(data->mmioErrorLog0),
 412                         be64_to_cpu(data->mmioErrorLog1));
 413         if (data->dma0ErrorStatus)
 414                 pr_info("InAErr:      %016llx %016llx %016llx %016llx\n",
 415                         be64_to_cpu(data->dma0ErrorStatus),
 416                         be64_to_cpu(data->dma0FirstErrorStatus),
 417                         be64_to_cpu(data->dma0ErrorLog0),
 418                         be64_to_cpu(data->dma0ErrorLog1));
 419         if (data->dma1ErrorStatus)
 420                 pr_info("InBErr:      %016llx %016llx %016llx %016llx\n",
 421                         be64_to_cpu(data->dma1ErrorStatus),
 422                         be64_to_cpu(data->dma1FirstErrorStatus),
 423                         be64_to_cpu(data->dma1ErrorLog0),
 424                         be64_to_cpu(data->dma1ErrorLog1));
 425
 426         pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_PHB3_NUM_PEST_REGS);
 427 }
 428
 429 static void pnv_pci_dump_phb4_diag_data(struct pci_controller *hose,
 430                                         struct OpalIoPhbErrorCommon *common)
 431 {
 432         struct OpalIoPhb4ErrorData *data;
 433
 434         data = (struct OpalIoPhb4ErrorData*)common;
 435         pr_info("PHB4 PHB#%d Diag-data (Version: %d)\n",
 436                 hose->global_number, be32_to_cpu(common->version));
 437         if (data->brdgCtl)
 438                 pr_info("brdgCtl:    %08x\n",
 439                         be32_to_cpu(data->brdgCtl));
 440         if (data->deviceStatus || data->slotStatus   ||
 441             data->linkStatus   || data->devCmdStatus ||
 442             data->devSecStatus)
 443                 pr_info("RootSts:    %08x %08x %08x %08x %08x\n",
 444                         be32_to_cpu(data->deviceStatus),
 445                         be32_to_cpu(data->slotStatus),
 446                         be32_to_cpu(data->linkStatus),
 447                         be32_to_cpu(data->devCmdStatus),
 448                         be32_to_cpu(data->devSecStatus));
 449         if (data->rootErrorStatus || data->uncorrErrorStatus ||
 450             data->corrErrorStatus)
 451                 pr_info("RootErrSts: %08x %08x %08x\n",
 452                         be32_to_cpu(data->rootErrorStatus),
 453                         be32_to_cpu(data->uncorrErrorStatus),
 454                         be32_to_cpu(data->corrErrorStatus));
 455         if (data->tlpHdr1 || data->tlpHdr2 ||
 456             data->tlpHdr3 || data->tlpHdr4)
 457                 pr_info("RootErrLog: %08x %08x %08x %08x\n",
 458                         be32_to_cpu(data->tlpHdr1),
 459                         be32_to_cpu(data->tlpHdr2),
 460                         be32_to_cpu(data->tlpHdr3),
 461                         be32_to_cpu(data->tlpHdr4));
 462         if (data->sourceId)
 463                 pr_info("sourceId:   %08x\n", be32_to_cpu(data->sourceId));
 464         if (data->nFir)
 465                 pr_info("nFir:       %016llx %016llx %016llx\n",
 466                         be64_to_cpu(data->nFir),
 467                         be64_to_cpu(data->nFirMask),
 468                         be64_to_cpu(data->nFirWOF));
 469         if (data->phbPlssr || data->phbCsr)
 470                 pr_info("PhbSts:     %016llx %016llx\n",
 471                         be64_to_cpu(data->phbPlssr),
 472                         be64_to_cpu(data->phbCsr));
 473         if (data->lemFir)
 474                 pr_info("Lem:        %016llx %016llx %016llx\n",
 475                         be64_to_cpu(data->lemFir),
 476                         be64_to_cpu(data->lemErrorMask),
 477                         be64_to_cpu(data->lemWOF));
 478         if (data->phbErrorStatus)
 479                 pr_info("PhbErr:     %016llx %016llx %016llx %016llx\n",
 480                         be64_to_cpu(data->phbErrorStatus),
 481                         be64_to_cpu(data->phbFirstErrorStatus),
 482                         be64_to_cpu(data->phbErrorLog0),
 483                         be64_to_cpu(data->phbErrorLog1));
 484         if (data->phbTxeErrorStatus)
 485                 pr_info("PhbTxeErr:  %016llx %016llx %016llx %016llx\n",
 486                         be64_to_cpu(data->phbTxeErrorStatus),
 487                         be64_to_cpu(data->phbTxeFirstErrorStatus),
 488                         be64_to_cpu(data->phbTxeErrorLog0),
 489                         be64_to_cpu(data->phbTxeErrorLog1));
 490         if (data->phbRxeArbErrorStatus)
 491                 pr_info("RxeArbErr:  %016llx %016llx %016llx %016llx\n",
 492                         be64_to_cpu(data->phbRxeArbErrorStatus),
 493                         be64_to_cpu(data->phbRxeArbFirstErrorStatus),
 494                         be64_to_cpu(data->phbRxeArbErrorLog0),
 495                         be64_to_cpu(data->phbRxeArbErrorLog1));
 496         if (data->phbRxeMrgErrorStatus)
 497                 pr_info("RxeMrgErr:  %016llx %016llx %016llx %016llx\n",
 498                         be64_to_cpu(data->phbRxeMrgErrorStatus),
 499                         be64_to_cpu(data->phbRxeMrgFirstErrorStatus),
 500                         be64_to_cpu(data->phbRxeMrgErrorLog0),
 501                         be64_to_cpu(data->phbRxeMrgErrorLog1));
 502         if (data->phbRxeTceErrorStatus)
 503                 pr_info("RxeTceErr:  %016llx %016llx %016llx %016llx\n",
 504                         be64_to_cpu(data->phbRxeTceErrorStatus),
 505                         be64_to_cpu(data->phbRxeTceFirstErrorStatus),
 506                         be64_to_cpu(data->phbRxeTceErrorLog0),
 507                         be64_to_cpu(data->phbRxeTceErrorLog1));
 508
 509         if (data->phbPblErrorStatus)
 510                 pr_info("PblErr:     %016llx %016llx %016llx %016llx\n",
 511                         be64_to_cpu(data->phbPblErrorStatus),
 512                         be64_to_cpu(data->phbPblFirstErrorStatus),
 513                         be64_to_cpu(data->phbPblErrorLog0),
 514                         be64_to_cpu(data->phbPblErrorLog1));
 515         if (data->phbPcieDlpErrorStatus)
 516                 pr_info("PcieDlp:    %016llx %016llx %016llx\n",
 517                         be64_to_cpu(data->phbPcieDlpErrorLog1),
 518                         be64_to_cpu(data->phbPcieDlpErrorLog2),
 519                         be64_to_cpu(data->phbPcieDlpErrorStatus));
 520         if (data->phbRegbErrorStatus)
 521                 pr_info("RegbErr:    %016llx %016llx %016llx %016llx\n",
 522                         be64_to_cpu(data->phbRegbErrorStatus),
 523                         be64_to_cpu(data->phbRegbFirstErrorStatus),
 524                         be64_to_cpu(data->phbRegbErrorLog0),
 525                         be64_to_cpu(data->phbRegbErrorLog1));
 526
 527
 528         pnv_pci_dump_pest(data->pestA, data->pestB, OPAL_PHB4_NUM_PEST_REGS);
 529 }
 530
 531 void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
 532                                 unsigned char *log_buff)
 533 {
 534         struct OpalIoPhbErrorCommon *common;
 535
 536         if (!hose || !log_buff)
 537                 return;
 538
 539         common = (struct OpalIoPhbErrorCommon *)log_buff;
 540         switch (be32_to_cpu(common->ioType)) {
 541         case OPAL_PHB_ERROR_DATA_TYPE_P7IOC:
 542                 pnv_pci_dump_p7ioc_diag_data(hose, common);
 543                 break;
 544         case OPAL_PHB_ERROR_DATA_TYPE_PHB3:
 545                 pnv_pci_dump_phb3_diag_data(hose, common);
 546                 break;
 547         case OPAL_PHB_ERROR_DATA_TYPE_PHB4:
 548                 pnv_pci_dump_phb4_diag_data(hose, common);
 549                 break;
 550         default:
 551                 pr_warn("%s: Unrecognized ioType %d\n",
 552                         __func__, be32_to_cpu(common->ioType));
 553         }
 554 }
 555
 556 static void pnv_pci_handle_eeh_config(struct pnv_phb *phb, u32 pe_no)
 557 {
 558         unsigned long flags, rc;
 559         int has_diag, ret = 0;
 560
 561         spin_lock_irqsave(&phb->lock, flags);
 562
 563         /* Fetch PHB diag-data */
 564         rc = opal_pci_get_phb_diag_data2(phb->opal_id, phb->diag_data,
 565                                          phb->diag_data_size);
 566         has_diag = (rc == OPAL_SUCCESS);
 567
 568         /* If PHB supports compound PE, to handle it */
 569         if (phb->unfreeze_pe) {
 570                 ret = phb->unfreeze_pe(phb,
 571                                        pe_no,
 572                                        OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
 573         } else {
 574                 rc = opal_pci_eeh_freeze_clear(phb->opal_id,
 575                                              pe_no,
 576                                              OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
 577                 if (rc) {
 578                         pr_warn("%s: Failure %ld clearing frozen "
 579                                 "PHB#%x-PE#%x\n",
 580                                 __func__, rc, phb->hose->global_number,
 581                                 pe_no);
 582                         ret = -EIO;
 583                 }
 584         }
 585
 586         /*
 587          * For now, let's only display the diag buffer when we fail to clear
 588          * the EEH status. We'll do more sensible things later when we have
 589          * proper EEH support. We need to make sure we don't pollute ourselves
 590          * with the normal errors generated when probing empty slots
 591          */
 592         if (has_diag && ret)
 593                 pnv_pci_dump_phb_diag_data(phb->hose, phb->diag_data);
 594
 595         spin_unlock_irqrestore(&phb->lock, flags);
 596 }
 597
 598 static void pnv_pci_config_check_eeh(struct pci_dn *pdn)
 599 {
 600         struct pnv_phb *phb = pdn->phb->private_data;
 601         u8      fstate = 0;
 602         __be16  pcierr = 0;
 603         unsigned int pe_no;
 604         s64     rc;
 605
 606         /*
 607          * Get the PE#. During the PCI probe stage, we might not
 608          * setup that yet. So all ER errors should be mapped to
 609          * reserved PE.
 610          */
 611         pe_no = pdn->pe_number;
 612         if (pe_no == IODA_INVALID_PE) {
 613                 pe_no = phb->ioda.reserved_pe_idx;
 614         }
 615
 616         /*
 617          * Fetch frozen state. If the PHB support compound PE,
 618          * we need handle that case.
 619          */
 620         if (phb->get_pe_state) {
 621                 fstate = phb->get_pe_state(phb, pe_no);
 622         } else {
 623                 rc = opal_pci_eeh_freeze_status(phb->opal_id,
 624                                                 pe_no,
 625                                                 &fstate,
 626                                                 &pcierr,
 627                                                 NULL);
 628                 if (rc) {
 629                         pr_warn("%s: Failure %lld getting PHB#%x-PE#%x state\n",
 630                                 __func__, rc, phb->hose->global_number, pe_no);
 631                         return;
 632                 }
 633         }
 634
 635         pr_devel(" -> EEH check, bdfn=%04x PE#%x fstate=%x\n",
 636                  (pdn->busno << 8) | (pdn->devfn), pe_no, fstate);
 637
 638         /* Clear the frozen state if applicable */
 639         if (fstate == OPAL_EEH_STOPPED_MMIO_FREEZE ||
 640             fstate == OPAL_EEH_STOPPED_DMA_FREEZE  ||
 641             fstate == OPAL_EEH_STOPPED_MMIO_DMA_FREEZE) {
 642                 /*
 643                  * If PHB supports compound PE, freeze it for
 644                  * consistency.
 645                  */
 646                 if (phb->freeze_pe)
 647                         phb->freeze_pe(phb, pe_no);
 648
 649                 pnv_pci_handle_eeh_config(phb, pe_no);
 650         }
 651 }
 652
 653 int pnv_pci_cfg_read(struct pci_dn *pdn,
 654                      int where, int size, u32 *val)
 655 {
 656         struct pnv_phb *phb = pdn->phb->private_data;
 657         u32 bdfn = (pdn->busno << 8) | pdn->devfn;
 658         s64 rc;
 659
 660         switch (size) {
 661         case 1: {
 662                 u8 v8;
 663                 rc = opal_pci_config_read_byte(phb->opal_id, bdfn, where, &v8);
 664                 *val = (rc == OPAL_SUCCESS) ? v8 : 0xff;
 665                 break;
 666         }
 667         case 2: {
 668                 __be16 v16;
 669                 rc = opal_pci_config_read_half_word(phb->opal_id, bdfn, where,
 670                                                    &v16);
 671                 *val = (rc == OPAL_SUCCESS) ? be16_to_cpu(v16) : 0xffff;
 672                 break;
 673         }
 674         case 4: {
 675                 __be32 v32;
 676                 rc = opal_pci_config_read_word(phb->opal_id, bdfn, where, &v32);
 677                 *val = (rc == OPAL_SUCCESS) ? be32_to_cpu(v32) : 0xffffffff;
 678                 break;
 679         }
 680         default:
 681                 return PCIBIOS_FUNC_NOT_SUPPORTED;
 682         }
 683
 684         pr_devel("%s: bus: %x devfn: %x +%x/%x -> %08x\n",
 685                  __func__, pdn->busno, pdn->devfn, where, size, *val);
 686         return PCIBIOS_SUCCESSFUL;
 687 }
 688
 689 int pnv_pci_cfg_write(struct pci_dn *pdn,
 690                       int where, int size, u32 val)
 691 {
 692         struct pnv_phb *phb = pdn->phb->private_data;
 693         u32 bdfn = (pdn->busno << 8) | pdn->devfn;
 694
 695         pr_devel("%s: bus: %x devfn: %x +%x/%x -> %08x\n",
 696                  __func__, pdn->busno, pdn->devfn, where, size, val);
 697         switch (size) {
 698         case 1:
 699                 opal_pci_config_write_byte(phb->opal_id, bdfn, where, val);
 700                 break;
 701         case 2:
 702                 opal_pci_config_write_half_word(phb->opal_id, bdfn, where, val);
 703                 break;
 704         case 4:
 705                 opal_pci_config_write_word(phb->opal_id, bdfn, where, val);
 706                 break;
 707         default:
 708                 return PCIBIOS_FUNC_NOT_SUPPORTED;
 709         }
 710
 711         return PCIBIOS_SUCCESSFUL;
 712 }
 713
 714 #if CONFIG_EEH
 715 static bool pnv_pci_cfg_check(struct pci_dn *pdn)
 716 {
 717         struct eeh_dev *edev = NULL;
 718         struct pnv_phb *phb = pdn->phb->private_data;
 719
 720         /* EEH not enabled ? */
 721         if (!(phb->flags & PNV_PHB_FLAG_EEH))
 722                 return true;
 723
 724         /* PE reset or device removed ? */
 725         edev = pdn->edev;
 726         if (edev) {
 727                 if (edev->pe &&
 728                     (edev->pe->state & EEH_PE_CFG_BLOCKED))
 729                         return false;
 730
 731                 if (edev->mode & EEH_DEV_REMOVED)
 732                         return false;
 733         }
 734
 735         return true;
 736 }
 737 #else
 738 static inline pnv_pci_cfg_check(struct pci_dn *pdn)
 739 {
 740         return true;
 741 }
 742 #endif /* CONFIG_EEH */
 743
 744 static int pnv_pci_read_config(struct pci_bus *bus,
 745                                unsigned int devfn,
 746                                int where, int size, u32 *val)
 747 {
 748         struct pci_dn *pdn;
 749         struct pnv_phb *phb;
 750         int ret;
 751
 752         *val = 0xFFFFFFFF;
 753         pdn = pci_get_pdn_by_devfn(bus, devfn);
 754         if (!pdn)
 755                 return PCIBIOS_DEVICE_NOT_FOUND;
 756
 757         if (!pnv_pci_cfg_check(pdn))
 758                 return PCIBIOS_DEVICE_NOT_FOUND;
 759
 760         ret = pnv_pci_cfg_read(pdn, where, size, val);
 761         phb = pdn->phb->private_data;
 762         if (phb->flags & PNV_PHB_FLAG_EEH && pdn->edev) {
 763                 if (*val == EEH_IO_ERROR_VALUE(size) &&
 764                     eeh_dev_check_failure(pdn->edev))
 765                         return PCIBIOS_DEVICE_NOT_FOUND;
 766         } else {
 767                 pnv_pci_config_check_eeh(pdn);
 768         }
 769
 770         return ret;
 771 }
 772
 773 static int pnv_pci_write_config(struct pci_bus *bus,
 774                                 unsigned int devfn,
 775                                 int where, int size, u32 val)
 776 {
 777         struct pci_dn *pdn;
 778         struct pnv_phb *phb;
 779         int ret;
 780
 781         pdn = pci_get_pdn_by_devfn(bus, devfn);
 782         if (!pdn)
 783                 return PCIBIOS_DEVICE_NOT_FOUND;
 784
 785         if (!pnv_pci_cfg_check(pdn))
 786                 return PCIBIOS_DEVICE_NOT_FOUND;
 787
 788         ret = pnv_pci_cfg_write(pdn, where, size, val);
 789         phb = pdn->phb->private_data;
 790         if (!(phb->flags & PNV_PHB_FLAG_EEH))
 791                 pnv_pci_config_check_eeh(pdn);
 792
 793         return ret;
 794 }
 795
 796 struct pci_ops pnv_pci_ops = {
 797         .read  = pnv_pci_read_config,
 798         .write = pnv_pci_write_config,
 799 };
 800
 801 struct iommu_table *pnv_pci_table_alloc(int nid)
 802 {
 803         struct iommu_table *tbl;
 804
 805         tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, nid);
 806         if (!tbl)
 807                 return NULL;
 808
 809         INIT_LIST_HEAD_RCU(&tbl->it_group_list);
 810         kref_init(&tbl->it_kref);
 811
 812         return tbl;
 813 }
 814
 815 struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev)
 816 {
 817         struct pci_controller *hose = pci_bus_to_host(dev->bus);
 818
 819         return of_node_get(hose->dn);
 820 }
 821 EXPORT_SYMBOL(pnv_pci_get_phb_node);
 822
 823 int pnv_pci_set_tunnel_bar(struct pci_dev *dev, u64 addr, int enable)
 824 {
 825         struct pnv_phb *phb = pci_bus_to_pnvhb(dev->bus);
 826         u64 tunnel_bar;
 827         __be64 val;
 828         int rc;
 829
 830         if (!opal_check_token(OPAL_PCI_GET_PBCQ_TUNNEL_BAR))
 831                 return -ENXIO;
 832         if (!opal_check_token(OPAL_PCI_SET_PBCQ_TUNNEL_BAR))
 833                 return -ENXIO;
 834
 835         mutex_lock(&tunnel_mutex);
 836         rc = opal_pci_get_pbcq_tunnel_bar(phb->opal_id, &val);
 837         if (rc != OPAL_SUCCESS) {
 838                 rc = -EIO;
 839                 goto out;
 840         }
 841         tunnel_bar = be64_to_cpu(val);
 842         if (enable) {
 843                 /*
 844                 * Only one device per PHB can use atomics.
 845                 * Our policy is first-come, first-served.
 846                 */
 847                 if (tunnel_bar) {
 848                         if (tunnel_bar != addr)
 849                                 rc = -EBUSY;
 850                         else
 851                                 rc = 0; /* Setting same address twice is ok */
 852                         goto out;
 853                 }
 854         } else {
 855                 /*
 856                 * The device that owns atomics and wants to release
 857                 * them must pass the same address with enable == 0.
 858                 */
 859                 if (tunnel_bar != addr) {
 860                         rc = -EPERM;
 861                         goto out;
 862                 }
 863                 addr = 0x0ULL;
 864         }
 865         rc = opal_pci_set_pbcq_tunnel_bar(phb->opal_id, addr);
 866         rc = opal_error_code(rc);
 867 out:
 868         mutex_unlock(&tunnel_mutex);
 869         return rc;
 870 }
 871 EXPORT_SYMBOL_GPL(pnv_pci_set_tunnel_bar);
 872
 873 void pnv_pci_shutdown(void)
 874 {
 875         struct pci_controller *hose;
 876
 877         list_for_each_entry(hose, &hose_list, list_node)
 878                 if (hose->controller_ops.shutdown)
 879                         hose->controller_ops.shutdown(hose);
 880 }
 881
 882 /* Fixup wrong class code in p7ioc and p8 root complex */
 883 static void pnv_p7ioc_rc_quirk(struct pci_dev *dev)
 884 {
 885         dev->class = PCI_CLASS_BRIDGE_PCI << 8;
 886 }
 887 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 0x3b9, pnv_p7ioc_rc_quirk);
 888
 889 void __init pnv_pci_init(void)
 890 {
 891         struct device_node *np;
 892
 893         pci_add_flags(PCI_CAN_SKIP_ISA_ALIGN);
 894
 895         /* If we don't have OPAL, eg. in sim, just skip PCI probe */
 896         if (!firmware_has_feature(FW_FEATURE_OPAL))
 897                 return;
 898
 899 #ifdef CONFIG_PCIEPORTBUS
 900         /*
 901          * On PowerNV PCIe devices are (currently) managed in cooperation
 902          * with firmware. This isn't *strictly* required, but there's enough
 903          * assumptions baked into both firmware and the platform code that
 904          * it's unwise to allow the portbus services to be used.
 905          *
 906          * We need to fix this eventually, but for now set this flag to disable
 907          * the portbus driver. The AER service isn't required since that AER
 908          * events are handled via EEH. The pciehp hotplug driver can't work
 909          * without kernel changes (and portbus binding breaks pnv_php). The
 910          * other services also require some thinking about how we're going
 911          * to integrate them.
 912          */
 913         pcie_ports_disabled = true;
 914 #endif
 915
 916         /* Look for IODA IO-Hubs. */
 917         for_each_compatible_node(np, NULL, "ibm,ioda-hub") {
 918                 pnv_pci_init_ioda_hub(np);
 919         }
 920
 921         /* Look for ioda2 built-in PHB3's */
 922         for_each_compatible_node(np, NULL, "ibm,ioda2-phb")
 923                 pnv_pci_init_ioda2_phb(np);
 924
 925         /* Look for ioda3 built-in PHB4's, we treat them as IODA2 */
 926         for_each_compatible_node(np, NULL, "ibm,ioda3-phb")
 927                 pnv_pci_init_ioda2_phb(np);
 928
 929         /* Look for NPU PHBs */
 930         for_each_compatible_node(np, NULL, "ibm,ioda2-npu-phb")
 931                 pnv_pci_init_npu_phb(np);
 932
 933         /*
 934          * Look for NPU2 PHBs which we treat mostly as NPU PHBs with
 935          * the exception of TCE kill which requires an OPAL call.
 936          */
 937         for_each_compatible_node(np, NULL, "ibm,ioda2-npu2-phb")
 938                 pnv_pci_init_npu_phb(np);
 939
 940         /* Look for NPU2 OpenCAPI PHBs */
 941         for_each_compatible_node(np, NULL, "ibm,ioda2-npu2-opencapi-phb")
 942                 pnv_pci_init_npu2_opencapi_phb(np);
 943
 944         /* Configure IOMMU DMA hooks */
 945         set_pci_dma_ops(&dma_iommu_ops);
 946 }
 947
 948 static int pnv_tce_iommu_bus_notifier(struct notifier_block *nb,
 949                 unsigned long action, void *data)
 950 {
 951         struct device *dev = data;
 952
 953         switch (action) {
 954         case BUS_NOTIFY_DEL_DEVICE:
 955                 iommu_del_device(dev);
 956                 return 0;
 957         default:
 958                 return 0;
 959         }
 960 }
 961
 962 static struct notifier_block pnv_tce_iommu_bus_nb = {
 963         .notifier_call = pnv_tce_iommu_bus_notifier,
 964 };
 965
 966 static int __init pnv_tce_iommu_bus_notifier_init(void)
 967 {
 968         bus_register_notifier(&pci_bus_type, &pnv_tce_iommu_bus_nb);
 969         return 0;
 970 }
 971 machine_subsys_initcall_sync(powernv, pnv_tce_iommu_bus_notifier_init);