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