LXR linux/arch/sparc/kernel/pci

   1/* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
   2 *
   3 * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
   4 * Copyright (C) 1998, 1999 Eddie C. Dost   (ecd@skynet.be)
   5 * Copyright (C) 1999 Jakub Jelinek   (jakub@redhat.com)
   6 */
   7
   8#include <linux/kernel.h>
   9#include <linux/types.h>
  10#include <linux/pci.h>
  11#include <linux/init.h>
  12#include <linux/export.h>
  13#include <linux/slab.h>
  14#include <linux/interrupt.h>
  15#include <linux/of_device.h>
  16
  17#include <asm/iommu.h>
  18#include <asm/irq.h>
  19#include <asm/starfire.h>
  20#include <asm/prom.h>
  21#include <asm/upa.h>
  22
  23#include "pci_impl.h"
  24#include "iommu_common.h"
  25#include "psycho_common.h"
  26
  27#define DRIVER_NAME     "psycho"
  28#define PFX             DRIVER_NAME ": "
  29
  30/* Misc. PSYCHO PCI controller register offsets and definitions. */
  31#define PSYCHO_CONTROL          0x0010UL
  32#define  PSYCHO_CONTROL_IMPL     0xf000000000000000UL /* Implementation of this PSYCHO*/
  33#define  PSYCHO_CONTROL_VER      0x0f00000000000000UL /* Version of this PSYCHO       */
  34#define  PSYCHO_CONTROL_MID      0x00f8000000000000UL /* UPA Module ID of PSYCHO      */
  35#define  PSYCHO_CONTROL_IGN      0x0007c00000000000UL /* Interrupt Group Number       */
  36#define  PSYCHO_CONTROL_RESV     0x00003ffffffffff0UL /* Reserved                     */
  37#define  PSYCHO_CONTROL_APCKEN   0x0000000000000008UL /* Address Parity Check Enable  */
  38#define  PSYCHO_CONTROL_APERR    0x0000000000000004UL /* Incoming System Addr Parerr  */
  39#define  PSYCHO_CONTROL_IAP      0x0000000000000002UL /* Invert UPA Parity            */
  40#define  PSYCHO_CONTROL_MODE     0x0000000000000001UL /* PSYCHO clock mode            */
  41#define PSYCHO_PCIA_CTRL        0x2000UL
  42#define PSYCHO_PCIB_CTRL        0x4000UL
  43#define  PSYCHO_PCICTRL_RESV1    0xfffffff000000000UL /* Reserved                     */
  44#define  PSYCHO_PCICTRL_SBH_ERR  0x0000000800000000UL /* Streaming byte hole error    */
  45#define  PSYCHO_PCICTRL_SERR     0x0000000400000000UL /* SERR signal asserted         */
  46#define  PSYCHO_PCICTRL_SPEED    0x0000000200000000UL /* PCI speed (1 is U2P clock)   */
  47#define  PSYCHO_PCICTRL_RESV2    0x00000001ffc00000UL /* Reserved                     */
  48#define  PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking      */
  49#define  PSYCHO_PCICTRL_RESV3    0x00000000001ff800UL /* Reserved                     */
  50#define  PSYCHO_PCICTRL_SBH_INT  0x0000000000000400UL /* Streaming byte hole int enab */
  51#define  PSYCHO_PCICTRL_WEN      0x0000000000000200UL /* Power Mgmt Wake Enable       */
  52#define  PSYCHO_PCICTRL_EEN      0x0000000000000100UL /* PCI Error Interrupt Enable   */
  53#define  PSYCHO_PCICTRL_RESV4    0x00000000000000c0UL /* Reserved                     */
  54#define  PSYCHO_PCICTRL_AEN      0x000000000000003fUL /* PCI DVMA Arbitration Enable  */
  55
  56/* PSYCHO error handling support. */
  57
  58/* Helper function of IOMMU error checking, which checks out
  59 * the state of the streaming buffers.  The IOMMU lock is
  60 * held when this is called.
  61 *
  62 * For the PCI error case we know which PBM (and thus which
  63 * streaming buffer) caused the error, but for the uncorrectable
  64 * error case we do not.  So we always check both streaming caches.
  65 */
  66#define PSYCHO_STRBUF_CONTROL_A 0x2800UL
  67#define PSYCHO_STRBUF_CONTROL_B 0x4800UL
  68#define  PSYCHO_STRBUF_CTRL_LPTR    0x00000000000000f0UL /* LRU Lock Pointer */
  69#define  PSYCHO_STRBUF_CTRL_LENAB   0x0000000000000008UL /* LRU Lock Enable */
  70#define  PSYCHO_STRBUF_CTRL_RRDIS   0x0000000000000004UL /* Rerun Disable */
  71#define  PSYCHO_STRBUF_CTRL_DENAB   0x0000000000000002UL /* Diagnostic Mode Enable */
  72#define  PSYCHO_STRBUF_CTRL_ENAB    0x0000000000000001UL /* Streaming Buffer Enable */
  73#define PSYCHO_STRBUF_FLUSH_A   0x2808UL
  74#define PSYCHO_STRBUF_FLUSH_B   0x4808UL
  75#define PSYCHO_STRBUF_FSYNC_A   0x2810UL
  76#define PSYCHO_STRBUF_FSYNC_B   0x4810UL
  77#define PSYCHO_STC_DATA_A       0xb000UL
  78#define PSYCHO_STC_DATA_B       0xc000UL
  79#define PSYCHO_STC_ERR_A        0xb400UL
  80#define PSYCHO_STC_ERR_B        0xc400UL
  81#define PSYCHO_STC_TAG_A        0xb800UL
  82#define PSYCHO_STC_TAG_B        0xc800UL
  83#define PSYCHO_STC_LINE_A       0xb900UL
  84#define PSYCHO_STC_LINE_B       0xc900UL
  85
  86/* When an Uncorrectable Error or a PCI Error happens, we
  87 * interrogate the IOMMU state to see if it is the cause.
  88 */
  89#define PSYCHO_IOMMU_CONTROL    0x0200UL
  90#define  PSYCHO_IOMMU_CTRL_RESV     0xfffffffff9000000UL /* Reserved                      */
  91#define  PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status      */
  92#define  PSYCHO_IOMMU_CTRL_XLTEERR  0x0000000001000000UL /* Translation Error encountered */
  93#define  PSYCHO_IOMMU_CTRL_LCKEN    0x0000000000800000UL /* Enable translation locking    */
  94#define  PSYCHO_IOMMU_CTRL_LCKPTR   0x0000000000780000UL /* Translation lock pointer      */
  95#define  PSYCHO_IOMMU_CTRL_TSBSZ    0x0000000000070000UL /* TSB Size                      */
  96#define  PSYCHO_IOMMU_TSBSZ_1K      0x0000000000000000UL /* TSB Table 1024 8-byte entries */
  97#define  PSYCHO_IOMMU_TSBSZ_2K      0x0000000000010000UL /* TSB Table 2048 8-byte entries */
  98#define  PSYCHO_IOMMU_TSBSZ_4K      0x0000000000020000UL /* TSB Table 4096 8-byte entries */
  99#define  PSYCHO_IOMMU_TSBSZ_8K      0x0000000000030000UL /* TSB Table 8192 8-byte entries */
 100#define  PSYCHO_IOMMU_TSBSZ_16K     0x0000000000040000UL /* TSB Table 16k 8-byte entries  */
 101#define  PSYCHO_IOMMU_TSBSZ_32K     0x0000000000050000UL /* TSB Table 32k 8-byte entries  */
 102#define  PSYCHO_IOMMU_TSBSZ_64K     0x0000000000060000UL /* TSB Table 64k 8-byte entries  */
 103#define  PSYCHO_IOMMU_TSBSZ_128K    0x0000000000070000UL /* TSB Table 128k 8-byte entries */
 104#define  PSYCHO_IOMMU_CTRL_RESV2    0x000000000000fff8UL /* Reserved                      */
 105#define  PSYCHO_IOMMU_CTRL_TBWSZ    0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
 106#define  PSYCHO_IOMMU_CTRL_DENAB    0x0000000000000002UL /* Diagnostic mode enable        */
 107#define  PSYCHO_IOMMU_CTRL_ENAB     0x0000000000000001UL /* IOMMU Enable                  */
 108#define PSYCHO_IOMMU_TSBBASE    0x0208UL
 109#define PSYCHO_IOMMU_FLUSH      0x0210UL
 110#define PSYCHO_IOMMU_TAG        0xa580UL
 111#define PSYCHO_IOMMU_DATA       0xa600UL
 112
 113/* Uncorrectable Errors.  Cause of the error and the address are
 114 * recorded in the UE_AFSR and UE_AFAR of PSYCHO.  They are errors
 115 * relating to UPA interface transactions.
 116 */
 117#define PSYCHO_UE_AFSR  0x0030UL
 118#define  PSYCHO_UEAFSR_PPIO     0x8000000000000000UL /* Primary PIO is cause         */
 119#define  PSYCHO_UEAFSR_PDRD     0x4000000000000000UL /* Primary DVMA read is cause   */
 120#define  PSYCHO_UEAFSR_PDWR     0x2000000000000000UL /* Primary DVMA write is cause  */
 121#define  PSYCHO_UEAFSR_SPIO     0x1000000000000000UL /* Secondary PIO is cause       */
 122#define  PSYCHO_UEAFSR_SDRD     0x0800000000000000UL /* Secondary DVMA read is cause */
 123#define  PSYCHO_UEAFSR_SDWR     0x0400000000000000UL /* Secondary DVMA write is cause*/
 124#define  PSYCHO_UEAFSR_RESV1    0x03ff000000000000UL /* Reserved                     */
 125#define  PSYCHO_UEAFSR_BMSK     0x0000ffff00000000UL /* Bytemask of failed transfer  */
 126#define  PSYCHO_UEAFSR_DOFF     0x00000000e0000000UL /* Doubleword Offset            */
 127#define  PSYCHO_UEAFSR_MID      0x000000001f000000UL /* UPA MID causing the fault    */
 128#define  PSYCHO_UEAFSR_BLK      0x0000000000800000UL /* Trans was block operation    */
 129#define  PSYCHO_UEAFSR_RESV2    0x00000000007fffffUL /* Reserved                     */
 130#define PSYCHO_UE_AFAR  0x0038UL
 131
 132static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
 133{
 134        struct pci_pbm_info *pbm = dev_id;
 135        unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
 136        unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
 137        unsigned long afsr, afar, error_bits;
 138        int reported;
 139
 140        /* Latch uncorrectable error status. */
 141        afar = upa_readq(afar_reg);
 142        afsr = upa_readq(afsr_reg);
 143
 144        /* Clear the primary/secondary error status bits. */
 145        error_bits = afsr &
 146                (PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
 147                 PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
 148        if (!error_bits)
 149                return IRQ_NONE;
 150        upa_writeq(error_bits, afsr_reg);
 151
 152        /* Log the error. */
 153        printk("%s: Uncorrectable Error, primary error type[%s]\n",
 154               pbm->name,
 155               (((error_bits & PSYCHO_UEAFSR_PPIO) ?
 156                 "PIO" :
 157                 ((error_bits & PSYCHO_UEAFSR_PDRD) ?
 158                  "DMA Read" :
 159                  ((error_bits & PSYCHO_UEAFSR_PDWR) ?
 160                   "DMA Write" : "???")))));
 161        printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
 162               pbm->name,
 163               (afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
 164               (afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
 165               (afsr & PSYCHO_UEAFSR_MID) >> 24UL,
 166               ((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
 167        printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
 168        printk("%s: UE Secondary errors [", pbm->name);
 169        reported = 0;
 170        if (afsr & PSYCHO_UEAFSR_SPIO) {
 171                reported++;
 172                printk("(PIO)");
 173        }
 174        if (afsr & PSYCHO_UEAFSR_SDRD) {
 175                reported++;
 176                printk("(DMA Read)");
 177        }
 178        if (afsr & PSYCHO_UEAFSR_SDWR) {
 179                reported++;
 180                printk("(DMA Write)");
 181        }
 182        if (!reported)
 183                printk("(none)");
 184        printk("]\n");
 185
 186        /* Interrogate both IOMMUs for error status. */
 187        psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
 188        if (pbm->sibling)
 189                psycho_check_iommu_error(pbm->sibling, afsr, afar, UE_ERR);
 190
 191        return IRQ_HANDLED;
 192}
 193
 194/* Correctable Errors. */
 195#define PSYCHO_CE_AFSR  0x0040UL
 196#define  PSYCHO_CEAFSR_PPIO     0x8000000000000000UL /* Primary PIO is cause         */
 197#define  PSYCHO_CEAFSR_PDRD     0x4000000000000000UL /* Primary DVMA read is cause   */
 198#define  PSYCHO_CEAFSR_PDWR     0x2000000000000000UL /* Primary DVMA write is cause  */
 199#define  PSYCHO_CEAFSR_SPIO     0x1000000000000000UL /* Secondary PIO is cause       */
 200#define  PSYCHO_CEAFSR_SDRD     0x0800000000000000UL /* Secondary DVMA read is cause */
 201#define  PSYCHO_CEAFSR_SDWR     0x0400000000000000UL /* Secondary DVMA write is cause*/
 202#define  PSYCHO_CEAFSR_RESV1    0x0300000000000000UL /* Reserved                     */
 203#define  PSYCHO_CEAFSR_ESYND    0x00ff000000000000UL /* Syndrome Bits                */
 204#define  PSYCHO_CEAFSR_BMSK     0x0000ffff00000000UL /* Bytemask of failed transfer  */
 205#define  PSYCHO_CEAFSR_DOFF     0x00000000e0000000UL /* Double Offset                */
 206#define  PSYCHO_CEAFSR_MID      0x000000001f000000UL /* UPA MID causing the fault    */
 207#define  PSYCHO_CEAFSR_BLK      0x0000000000800000UL /* Trans was block operation    */
 208#define  PSYCHO_CEAFSR_RESV2    0x00000000007fffffUL /* Reserved                     */
 209#define PSYCHO_CE_AFAR  0x0040UL
 210
 211static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
 212{
 213        struct pci_pbm_info *pbm = dev_id;
 214        unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
 215        unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
 216        unsigned long afsr, afar, error_bits;
 217        int reported;
 218
 219        /* Latch error status. */
 220        afar = upa_readq(afar_reg);
 221        afsr = upa_readq(afsr_reg);
 222
 223        /* Clear primary/secondary error status bits. */
 224        error_bits = afsr &
 225                (PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
 226                 PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
 227        if (!error_bits)
 228                return IRQ_NONE;
 229        upa_writeq(error_bits, afsr_reg);
 230
 231        /* Log the error. */
 232        printk("%s: Correctable Error, primary error type[%s]\n",
 233               pbm->name,
 234               (((error_bits & PSYCHO_CEAFSR_PPIO) ?
 235                 "PIO" :
 236                 ((error_bits & PSYCHO_CEAFSR_PDRD) ?
 237                  "DMA Read" :
 238                  ((error_bits & PSYCHO_CEAFSR_PDWR) ?
 239                   "DMA Write" : "???")))));
 240
 241        /* XXX Use syndrome and afar to print out module string just like
 242         * XXX UDB CE trap handler does... -DaveM
 243         */
 244        printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
 245               "UPA_MID[%02lx] was_block(%d)\n",
 246               pbm->name,
 247               (afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
 248               (afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
 249               (afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
 250               (afsr & PSYCHO_CEAFSR_MID) >> 24UL,
 251               ((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
 252        printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
 253        printk("%s: CE Secondary errors [", pbm->name);
 254        reported = 0;
 255        if (afsr & PSYCHO_CEAFSR_SPIO) {
 256                reported++;
 257                printk("(PIO)");
 258        }
 259        if (afsr & PSYCHO_CEAFSR_SDRD) {
 260                reported++;
 261                printk("(DMA Read)");
 262        }
 263        if (afsr & PSYCHO_CEAFSR_SDWR) {
 264                reported++;
 265                printk("(DMA Write)");
 266        }
 267        if (!reported)
 268                printk("(none)");
 269        printk("]\n");
 270
 271        return IRQ_HANDLED;
 272}
 273
 274/* PCI Errors.  They are signalled by the PCI bus module since they
 275 * are associated with a specific bus segment.
 276 */
 277#define PSYCHO_PCI_AFSR_A       0x2010UL
 278#define PSYCHO_PCI_AFSR_B       0x4010UL
 279#define PSYCHO_PCI_AFAR_A       0x2018UL
 280#define PSYCHO_PCI_AFAR_B       0x4018UL
 281
 282/* XXX What about PowerFail/PowerManagement??? -DaveM */
 283#define PSYCHO_ECC_CTRL         0x0020
 284#define  PSYCHO_ECCCTRL_EE       0x8000000000000000UL /* Enable ECC Checking */
 285#define  PSYCHO_ECCCTRL_UE       0x4000000000000000UL /* Enable UE Interrupts */
 286#define  PSYCHO_ECCCTRL_CE       0x2000000000000000UL /* Enable CE INterrupts */
 287static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
 288{
 289        struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
 290        unsigned long base = pbm->controller_regs;
 291        u64 tmp;
 292        int err;
 293
 294        if (!op)
 295                return;
 296
 297        /* Psycho interrupt property order is:
 298         * 0: PCIERR INO for this PBM
 299         * 1: UE ERR
 300         * 2: CE ERR
 301         * 3: POWER FAIL
 302         * 4: SPARE HARDWARE
 303         * 5: POWER MANAGEMENT
 304         */
 305
 306        if (op->archdata.num_irqs < 6)
 307                return;
 308
 309        /* We really mean to ignore the return result here.  Two
 310         * PCI controller share the same interrupt numbers and
 311         * drive the same front-end hardware.
 312         */
 313        err = request_irq(op->archdata.irqs[1], psycho_ue_intr, IRQF_SHARED,
 314                          "PSYCHO_UE", pbm);
 315        err = request_irq(op->archdata.irqs[2], psycho_ce_intr, IRQF_SHARED,
 316                          "PSYCHO_CE", pbm);
 317
 318        /* This one, however, ought not to fail.  We can just warn
 319         * about it since the system can still operate properly even
 320         * if this fails.
 321         */
 322        err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, IRQF_SHARED,
 323                          "PSYCHO_PCIERR", pbm);
 324        if (err)
 325                printk(KERN_WARNING "%s: Could not register PCIERR, "
 326                       "err=%d\n", pbm->name, err);
 327
 328        /* Enable UE and CE interrupts for controller. */
 329        upa_writeq((PSYCHO_ECCCTRL_EE |
 330                    PSYCHO_ECCCTRL_UE |
 331                    PSYCHO_ECCCTRL_CE), base + PSYCHO_ECC_CTRL);
 332
 333        /* Enable PCI Error interrupts and clear error
 334         * bits for each PBM.
 335         */
 336        tmp = upa_readq(base + PSYCHO_PCIA_CTRL);
 337        tmp |= (PSYCHO_PCICTRL_SERR |
 338                PSYCHO_PCICTRL_SBH_ERR |
 339                PSYCHO_PCICTRL_EEN);
 340        tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
 341        upa_writeq(tmp, base + PSYCHO_PCIA_CTRL);
 342                     
 343        tmp = upa_readq(base + PSYCHO_PCIB_CTRL);
 344        tmp |= (PSYCHO_PCICTRL_SERR |
 345                PSYCHO_PCICTRL_SBH_ERR |
 346                PSYCHO_PCICTRL_EEN);
 347        tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
 348        upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
 349}
 350
 351/* PSYCHO boot time probing and initialization. */
 352static void pbm_config_busmastering(struct pci_pbm_info *pbm)
 353{
 354        u8 *addr;
 355
 356        /* Set cache-line size to 64 bytes, this is actually
 357         * a nop but I do it for completeness.
 358         */
 359        addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
 360                                        0, PCI_CACHE_LINE_SIZE);
 361        pci_config_write8(addr, 64 / sizeof(u32));
 362
 363        /* Set PBM latency timer to 64 PCI clocks. */
 364        addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
 365                                        0, PCI_LATENCY_TIMER);
 366        pci_config_write8(addr, 64);
 367}
 368
 369static void psycho_scan_bus(struct pci_pbm_info *pbm,
 370                            struct device *parent)
 371{
 372        pbm_config_busmastering(pbm);
 373        pbm->is_66mhz_capable = 0;
 374        pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
 375
 376        /* After the PCI bus scan is complete, we can register
 377         * the error interrupt handlers.
 378         */
 379        psycho_register_error_handlers(pbm);
 380}
 381
 382#define PSYCHO_IRQ_RETRY        0x1a00UL
 383#define PSYCHO_PCIA_DIAG        0x2020UL
 384#define PSYCHO_PCIB_DIAG        0x4020UL
 385#define  PSYCHO_PCIDIAG_RESV     0xffffffffffffff80UL /* Reserved                     */
 386#define  PSYCHO_PCIDIAG_DRETRY   0x0000000000000040UL /* Disable retry limit          */
 387#define  PSYCHO_PCIDIAG_DISYNC   0x0000000000000020UL /* Disable DMA wr / irq sync    */
 388#define  PSYCHO_PCIDIAG_DDWSYNC  0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
 389#define  PSYCHO_PCIDIAG_IDDPAR   0x0000000000000008UL /* Invert DMA data parity       */
 390#define  PSYCHO_PCIDIAG_IPDPAR   0x0000000000000004UL /* Invert PIO data parity       */
 391#define  PSYCHO_PCIDIAG_IPAPAR   0x0000000000000002UL /* Invert PIO address parity    */
 392#define  PSYCHO_PCIDIAG_LPBACK   0x0000000000000001UL /* Enable loopback mode         */
 393
 394static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
 395{
 396        u64 tmp;
 397
 398        upa_writeq(5, pbm->controller_regs + PSYCHO_IRQ_RETRY);
 399
 400        /* Enable arbiter for all PCI slots. */
 401        tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_CTRL);
 402        tmp |= PSYCHO_PCICTRL_AEN;
 403        upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_CTRL);
 404
 405        tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_CTRL);
 406        tmp |= PSYCHO_PCICTRL_AEN;
 407        upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_CTRL);
 408
 409        /* Disable DMA write / PIO read synchronization on
 410         * both PCI bus segments.
 411         * [ U2P Erratum 1243770, STP2223BGA data sheet ]
 412         */
 413        tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_DIAG);
 414        tmp |= PSYCHO_PCIDIAG_DDWSYNC;
 415        upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_DIAG);
 416
 417        tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_DIAG);
 418        tmp |= PSYCHO_PCIDIAG_DDWSYNC;
 419        upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_DIAG);
 420}
 421
 422static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
 423                                   int is_pbm_a)
 424{
 425        unsigned long base = pbm->controller_regs;
 426        u64 control;
 427
 428        if (is_pbm_a) {
 429                pbm->stc.strbuf_control  = base + PSYCHO_STRBUF_CONTROL_A;
 430                pbm->stc.strbuf_pflush   = base + PSYCHO_STRBUF_FLUSH_A;
 431                pbm->stc.strbuf_fsync    = base + PSYCHO_STRBUF_FSYNC_A;
 432                pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
 433                pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
 434                pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_A;
 435        } else {
 436                pbm->stc.strbuf_control  = base + PSYCHO_STRBUF_CONTROL_B;
 437                pbm->stc.strbuf_pflush   = base + PSYCHO_STRBUF_FLUSH_B;
 438                pbm->stc.strbuf_fsync    = base + PSYCHO_STRBUF_FSYNC_B;
 439                pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
 440                pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
 441                pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_B;
 442        }
 443        /* PSYCHO's streaming buffer lacks ctx flushing. */
 444        pbm->stc.strbuf_ctxflush      = 0;
 445        pbm->stc.strbuf_ctxmatch_base = 0;
 446
 447        pbm->stc.strbuf_flushflag = (volatile unsigned long *)
 448                ((((unsigned long)&pbm->stc.__flushflag_buf[0])
 449                  + 63UL)
 450                 & ~63UL);
 451        pbm->stc.strbuf_flushflag_pa = (unsigned long)
 452                __pa(pbm->stc.strbuf_flushflag);
 453
 454        /* Enable the streaming buffer.  We have to be careful
 455         * just in case OBP left it with LRU locking enabled.
 456         *
 457         * It is possible to control if PBM will be rerun on
 458         * line misses.  Currently I just retain whatever setting
 459         * OBP left us with.  All checks so far show it having
 460         * a value of zero.
 461         */
 462#undef PSYCHO_STRBUF_RERUN_ENABLE
 463#undef PSYCHO_STRBUF_RERUN_DISABLE
 464        control = upa_readq(pbm->stc.strbuf_control);
 465        control |= PSYCHO_STRBUF_CTRL_ENAB;
 466        control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
 467#ifdef PSYCHO_STRBUF_RERUN_ENABLE
 468        control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
 469#else
 470#ifdef PSYCHO_STRBUF_RERUN_DISABLE
 471        control |= PSYCHO_STRBUF_CTRL_RRDIS;
 472#endif
 473#endif
 474        upa_writeq(control, pbm->stc.strbuf_control);
 475
 476        pbm->stc.strbuf_enabled = 1;
 477}
 478
 479#define PSYCHO_IOSPACE_A        0x002000000UL
 480#define PSYCHO_IOSPACE_B        0x002010000UL
 481#define PSYCHO_IOSPACE_SIZE     0x00000ffffUL
 482#define PSYCHO_MEMSPACE_A       0x100000000UL
 483#define PSYCHO_MEMSPACE_B       0x180000000UL
 484#define PSYCHO_MEMSPACE_SIZE    0x07fffffffUL
 485
 486static void psycho_pbm_init(struct pci_pbm_info *pbm,
 487                            struct platform_device *op, int is_pbm_a)
 488{
 489        psycho_pbm_init_common(pbm, op, "PSYCHO", PBM_CHIP_TYPE_PSYCHO);
 490        psycho_pbm_strbuf_init(pbm, is_pbm_a);
 491        psycho_scan_bus(pbm, &op->dev);
 492}
 493
 494static struct pci_pbm_info *psycho_find_sibling(u32 upa_portid)
 495{
 496        struct pci_pbm_info *pbm;
 497
 498        for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
 499                if (pbm->portid == upa_portid)
 500                        return pbm;
 501        }
 502        return NULL;
 503}
 504
 505#define PSYCHO_CONFIGSPACE      0x001000000UL
 506
 507static int psycho_probe(struct platform_device *op)
 508{
 509        const struct linux_prom64_registers *pr_regs;
 510        struct device_node *dp = op->dev.of_node;
 511        struct pci_pbm_info *pbm;
 512        struct iommu *iommu;
 513        int is_pbm_a, err;
 514        u32 upa_portid;
 515
 516        upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
 517
 518        err = -ENOMEM;
 519        pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
 520        if (!pbm) {
 521                printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
 522                goto out_err;
 523        }
 524
 525        pbm->sibling = psycho_find_sibling(upa_portid);
 526        if (pbm->sibling) {
 527                iommu = pbm->sibling->iommu;
 528        } else {
 529                iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
 530                if (!iommu) {
 531                        printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
 532                        goto out_free_controller;
 533                }
 534        }
 535
 536        pbm->iommu = iommu;
 537        pbm->portid = upa_portid;
 538
 539        pr_regs = of_get_property(dp, "reg", NULL);
 540        err = -ENODEV;
 541        if (!pr_regs) {
 542                printk(KERN_ERR PFX "No reg property.\n");
 543                goto out_free_iommu;
 544        }
 545
 546        is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
 547
 548        pbm->controller_regs = pr_regs[2].phys_addr;
 549        pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
 550
 551        if (is_pbm_a) {
 552                pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
 553                pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
 554                pbm->pci_csr  = pbm->controller_regs + PSYCHO_PCIA_CTRL;
 555        } else {
 556                pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
 557                pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
 558                pbm->pci_csr  = pbm->controller_regs + PSYCHO_PCIB_CTRL;
 559        }
 560
 561        psycho_controller_hwinit(pbm);
 562        if (!pbm->sibling) {
 563                err = psycho_iommu_init(pbm, 128, 0xc0000000,
 564                                        0xffffffff, PSYCHO_CONTROL);
 565                if (err)
 566                        goto out_free_iommu;
 567
 568                /* If necessary, hook us up for starfire IRQ translations. */
 569                if (this_is_starfire)
 570                        starfire_hookup(pbm->portid);
 571        }
 572
 573        psycho_pbm_init(pbm, op, is_pbm_a);
 574
 575        pbm->next = pci_pbm_root;
 576        pci_pbm_root = pbm;
 577
 578        if (pbm->sibling)
 579                pbm->sibling->sibling = pbm;
 580
 581        dev_set_drvdata(&op->dev, pbm);
 582
 583        return 0;
 584
 585out_free_iommu:
 586        if (!pbm->sibling)
 587                kfree(pbm->iommu);
 588
 589out_free_controller:
 590        kfree(pbm);
 591
 592out_err:
 593        return err;
 594}
 595
 596static const struct of_device_id psycho_match[] = {
 597        {
 598                .name = "pci",
 599                .compatible = "pci108e,8000",
 600        },
 601        {},
 602};
 603
 604static struct platform_driver psycho_driver = {
 605        .driver = {
 606                .name = DRIVER_NAME,
 607                .of_match_table = psycho_match,
 608        },
 609        .probe          = psycho_probe,
 610};
 611
 612static int __init psycho_init(void)
 613{
 614        return platform_driver_register(&psycho_driver);
 615}
 616
 617subsys_initcall(psycho_init);
 618