1 /* psycho_common.c: Code common to PSYCHO and derivative PCI controllers. 2 * 3 * Copyright (C) 2008 David S. Miller <davem@davemloft.net> 4 */ 5 #include <linux/kernel.h> 6 #include <linux/interrupt.h> 7 8 #include <asm/upa.h> 9 10 #include "pci_impl.h" 11 #include "iommu_common.h" 12 #include "psycho_common.h" 13 14 #define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002ULL 15 #define PSYCHO_STCERR_WRITE 0x0000000000000002ULL 16 #define PSYCHO_STCERR_READ 0x0000000000000001ULL 17 #define PSYCHO_STCTAG_PPN 0x0fffffff00000000ULL 18 #define PSYCHO_STCTAG_VPN 0x00000000ffffe000ULL 19 #define PSYCHO_STCTAG_VALID 0x0000000000000002ULL 20 #define PSYCHO_STCTAG_WRITE 0x0000000000000001ULL 21 #define PSYCHO_STCLINE_LINDX 0x0000000001e00000ULL 22 #define PSYCHO_STCLINE_SPTR 0x00000000001f8000ULL 23 #define PSYCHO_STCLINE_LADDR 0x0000000000007f00ULL 24 #define PSYCHO_STCLINE_EPTR 0x00000000000000fcULL 25 #define PSYCHO_STCLINE_VALID 0x0000000000000002ULL 26 #define PSYCHO_STCLINE_FOFN 0x0000000000000001ULL 27 28 static DEFINE_SPINLOCK(stc_buf_lock); 29 static unsigned long stc_error_buf[128]; 30 static unsigned long stc_tag_buf[16]; 31 static unsigned long stc_line_buf[16]; 32 33 static void psycho_check_stc_error(struct pci_pbm_info *pbm) 34 { 35 unsigned long err_base, tag_base, line_base; 36 struct strbuf *strbuf = &pbm->stc; 37 u64 control; 38 int i; 39 40 if (!strbuf->strbuf_control) 41 return; 42 43 err_base = strbuf->strbuf_err_stat; 44 tag_base = strbuf->strbuf_tag_diag; 45 line_base = strbuf->strbuf_line_diag; 46 47 spin_lock(&stc_buf_lock); 48 49 /* This is __REALLY__ dangerous. When we put the streaming 50 * buffer into diagnostic mode to probe it's tags and error 51 * status, we _must_ clear all of the line tag valid bits 52 * before re-enabling the streaming buffer. If any dirty data 53 * lives in the STC when we do this, we will end up 54 * invalidating it before it has a chance to reach main 55 * memory. 56 */ 57 control = upa_readq(strbuf->strbuf_control); 58 upa_writeq(control | PSYCHO_STRBUF_CTRL_DENAB, strbuf->strbuf_control); 59 for (i = 0; i < 128; i++) { 60 u64 val; 61 62 val = upa_readq(err_base + (i * 8UL)); 63 upa_writeq(0UL, err_base + (i * 8UL)); 64 stc_error_buf[i] = val; 65 } 66 for (i = 0; i < 16; i++) { 67 stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL)); 68 stc_line_buf[i] = upa_readq(line_base + (i * 8UL)); 69 upa_writeq(0UL, tag_base + (i * 8UL)); 70 upa_writeq(0UL, line_base + (i * 8UL)); 71 } 72 73 /* OK, state is logged, exit diagnostic mode. */ 74 upa_writeq(control, strbuf->strbuf_control); 75 76 for (i = 0; i < 16; i++) { 77 int j, saw_error, first, last; 78 79 saw_error = 0; 80 first = i * 8; 81 last = first + 8; 82 for (j = first; j < last; j++) { 83 u64 errval = stc_error_buf[j]; 84 if (errval != 0) { 85 saw_error++; 86 printk(KERN_ERR "%s: STC_ERR(%d)[wr(%d)" 87 "rd(%d)]\n", 88 pbm->name, 89 j, 90 (errval & PSYCHO_STCERR_WRITE) ? 1 : 0, 91 (errval & PSYCHO_STCERR_READ) ? 1 : 0); 92 } 93 } 94 if (saw_error != 0) { 95 u64 tagval = stc_tag_buf[i]; 96 u64 lineval = stc_line_buf[i]; 97 printk(KERN_ERR "%s: STC_TAG(%d)[PA(%016llx)VA(%08llx)" 98 "V(%d)W(%d)]\n", 99 pbm->name, 100 i, 101 ((tagval & PSYCHO_STCTAG_PPN) >> 19UL), 102 (tagval & PSYCHO_STCTAG_VPN), 103 ((tagval & PSYCHO_STCTAG_VALID) ? 1 : 0), 104 ((tagval & PSYCHO_STCTAG_WRITE) ? 1 : 0)); 105 printk(KERN_ERR "%s: STC_LINE(%d)[LIDX(%llx)SP(%llx)" 106 "LADDR(%llx)EP(%llx)V(%d)FOFN(%d)]\n", 107 pbm->name, 108 i, 109 ((lineval & PSYCHO_STCLINE_LINDX) >> 21UL), 110 ((lineval & PSYCHO_STCLINE_SPTR) >> 15UL), 111 ((lineval & PSYCHO_STCLINE_LADDR) >> 8UL), 112 ((lineval & PSYCHO_STCLINE_EPTR) >> 2UL), 113 ((lineval & PSYCHO_STCLINE_VALID) ? 1 : 0), 114 ((lineval & PSYCHO_STCLINE_FOFN) ? 1 : 0)); 115 } 116 } 117 118 spin_unlock(&stc_buf_lock); 119 } 120 121 #define PSYCHO_IOMMU_TAG 0xa580UL 122 #define PSYCHO_IOMMU_DATA 0xa600UL 123 124 static void psycho_record_iommu_tags_and_data(struct pci_pbm_info *pbm, 125 u64 *tag, u64 *data) 126 { 127 int i; 128 129 for (i = 0; i < 16; i++) { 130 unsigned long base = pbm->controller_regs; 131 unsigned long off = i * 8UL; 132 133 tag[i] = upa_readq(base + PSYCHO_IOMMU_TAG+off); 134 data[i] = upa_readq(base + PSYCHO_IOMMU_DATA+off); 135 136 /* Now clear out the entry. */ 137 upa_writeq(0, base + PSYCHO_IOMMU_TAG + off); 138 upa_writeq(0, base + PSYCHO_IOMMU_DATA + off); 139 } 140 } 141 142 #define PSYCHO_IOMMU_TAG_ERRSTS (0x3UL << 23UL) 143 #define PSYCHO_IOMMU_TAG_ERR (0x1UL << 22UL) 144 #define PSYCHO_IOMMU_TAG_WRITE (0x1UL << 21UL) 145 #define PSYCHO_IOMMU_TAG_STREAM (0x1UL << 20UL) 146 #define PSYCHO_IOMMU_TAG_SIZE (0x1UL << 19UL) 147 #define PSYCHO_IOMMU_TAG_VPAGE 0x7ffffULL 148 #define PSYCHO_IOMMU_DATA_VALID (1UL << 30UL) 149 #define PSYCHO_IOMMU_DATA_CACHE (1UL << 28UL) 150 #define PSYCHO_IOMMU_DATA_PPAGE 0xfffffffULL 151 152 static void psycho_dump_iommu_tags_and_data(struct pci_pbm_info *pbm, 153 u64 *tag, u64 *data) 154 { 155 int i; 156 157 for (i = 0; i < 16; i++) { 158 u64 tag_val, data_val; 159 const char *type_str; 160 tag_val = tag[i]; 161 if (!(tag_val & PSYCHO_IOMMU_TAG_ERR)) 162 continue; 163 164 data_val = data[i]; 165 switch((tag_val & PSYCHO_IOMMU_TAG_ERRSTS) >> 23UL) { 166 case 0: 167 type_str = "Protection Error"; 168 break; 169 case 1: 170 type_str = "Invalid Error"; 171 break; 172 case 2: 173 type_str = "TimeOut Error"; 174 break; 175 case 3: 176 default: 177 type_str = "ECC Error"; 178 break; 179 } 180 181 printk(KERN_ERR "%s: IOMMU TAG(%d)[error(%s) wr(%d) " 182 "str(%d) sz(%dK) vpg(%08llx)]\n", 183 pbm->name, i, type_str, 184 ((tag_val & PSYCHO_IOMMU_TAG_WRITE) ? 1 : 0), 185 ((tag_val & PSYCHO_IOMMU_TAG_STREAM) ? 1 : 0), 186 ((tag_val & PSYCHO_IOMMU_TAG_SIZE) ? 64 : 8), 187 (tag_val & PSYCHO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT); 188 printk(KERN_ERR "%s: IOMMU DATA(%d)[valid(%d) cache(%d) " 189 "ppg(%016llx)]\n", 190 pbm->name, i, 191 ((data_val & PSYCHO_IOMMU_DATA_VALID) ? 1 : 0), 192 ((data_val & PSYCHO_IOMMU_DATA_CACHE) ? 1 : 0), 193 (data_val & PSYCHO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT); 194 } 195 } 196 197 #define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL 198 #define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL 199 200 void psycho_check_iommu_error(struct pci_pbm_info *pbm, 201 unsigned long afsr, 202 unsigned long afar, 203 enum psycho_error_type type) 204 { 205 u64 control, iommu_tag[16], iommu_data[16]; 206 struct iommu *iommu = pbm->iommu; 207 unsigned long flags; 208 209 spin_lock_irqsave(&iommu->lock, flags); 210 control = upa_readq(iommu->iommu_control); 211 if (control & PSYCHO_IOMMU_CTRL_XLTEERR) { 212 const char *type_str; 213 214 control &= ~PSYCHO_IOMMU_CTRL_XLTEERR; 215 upa_writeq(control, iommu->iommu_control); 216 217 switch ((control & PSYCHO_IOMMU_CTRL_XLTESTAT) >> 25UL) { 218 case 0: 219 type_str = "Protection Error"; 220 break; 221 case 1: 222 type_str = "Invalid Error"; 223 break; 224 case 2: 225 type_str = "TimeOut Error"; 226 break; 227 case 3: 228 default: 229 type_str = "ECC Error"; 230 break; 231 } 232 printk(KERN_ERR "%s: IOMMU Error, type[%s]\n", 233 pbm->name, type_str); 234 235 /* It is very possible for another DVMA to occur while 236 * we do this probe, and corrupt the system further. 237 * But we are so screwed at this point that we are 238 * likely to crash hard anyways, so get as much 239 * diagnostic information to the console as we can. 240 */ 241 psycho_record_iommu_tags_and_data(pbm, iommu_tag, iommu_data); 242 psycho_dump_iommu_tags_and_data(pbm, iommu_tag, iommu_data); 243 } 244 psycho_check_stc_error(pbm); 245 spin_unlock_irqrestore(&iommu->lock, flags); 246 } 247 248 #define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL 249 #define PSYCHO_PCICTRL_SERR 0x0000000400000000UL 250 251 static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm) 252 { 253 irqreturn_t ret = IRQ_NONE; 254 u64 csr, csr_error_bits; 255 u16 stat, *addr; 256 257 csr = upa_readq(pbm->pci_csr); 258 csr_error_bits = csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR); 259 if (csr_error_bits) { 260 /* Clear the errors. */ 261 upa_writeq(csr, pbm->pci_csr); 262 263 /* Log 'em. */ 264 if (csr_error_bits & PSYCHO_PCICTRL_SBH_ERR) 265 printk(KERN_ERR "%s: PCI streaming byte hole " 266 "error asserted.\n", pbm->name); 267 if (csr_error_bits & PSYCHO_PCICTRL_SERR) 268 printk(KERN_ERR "%s: PCI SERR signal asserted.\n", 269 pbm->name); 270 ret = IRQ_HANDLED; 271 } 272 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno, 273 0, PCI_STATUS); 274 pci_config_read16(addr, &stat); 275 if (stat & (PCI_STATUS_PARITY | 276 PCI_STATUS_SIG_TARGET_ABORT | 277 PCI_STATUS_REC_TARGET_ABORT | 278 PCI_STATUS_REC_MASTER_ABORT | 279 PCI_STATUS_SIG_SYSTEM_ERROR)) { 280 printk(KERN_ERR "%s: PCI bus error, PCI_STATUS[%04x]\n", 281 pbm->name, stat); 282 pci_config_write16(addr, 0xffff); 283 ret = IRQ_HANDLED; 284 } 285 return ret; 286 } 287 288 #define PSYCHO_PCIAFSR_PMA 0x8000000000000000ULL 289 #define PSYCHO_PCIAFSR_PTA 0x4000000000000000ULL 290 #define PSYCHO_PCIAFSR_PRTRY 0x2000000000000000ULL 291 #define PSYCHO_PCIAFSR_PPERR 0x1000000000000000ULL 292 #define PSYCHO_PCIAFSR_SMA 0x0800000000000000ULL 293 #define PSYCHO_PCIAFSR_STA 0x0400000000000000ULL 294 #define PSYCHO_PCIAFSR_SRTRY 0x0200000000000000ULL 295 #define PSYCHO_PCIAFSR_SPERR 0x0100000000000000ULL 296 #define PSYCHO_PCIAFSR_RESV1 0x00ff000000000000ULL 297 #define PSYCHO_PCIAFSR_BMSK 0x0000ffff00000000ULL 298 #define PSYCHO_PCIAFSR_BLK 0x0000000080000000ULL 299 #define PSYCHO_PCIAFSR_RESV2 0x0000000040000000ULL 300 #define PSYCHO_PCIAFSR_MID 0x000000003e000000ULL 301 #define PSYCHO_PCIAFSR_RESV3 0x0000000001ffffffULL 302 303 irqreturn_t psycho_pcierr_intr(int irq, void *dev_id) 304 { 305 struct pci_pbm_info *pbm = dev_id; 306 u64 afsr, afar, error_bits; 307 int reported; 308 309 afsr = upa_readq(pbm->pci_afsr); 310 afar = upa_readq(pbm->pci_afar); 311 error_bits = afsr & 312 (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_PTA | 313 PSYCHO_PCIAFSR_PRTRY | PSYCHO_PCIAFSR_PPERR | 314 PSYCHO_PCIAFSR_SMA | PSYCHO_PCIAFSR_STA | 315 PSYCHO_PCIAFSR_SRTRY | PSYCHO_PCIAFSR_SPERR); 316 if (!error_bits) 317 return psycho_pcierr_intr_other(pbm); 318 upa_writeq(error_bits, pbm->pci_afsr); 319 printk(KERN_ERR "%s: PCI Error, primary error type[%s]\n", 320 pbm->name, 321 (((error_bits & PSYCHO_PCIAFSR_PMA) ? 322 "Master Abort" : 323 ((error_bits & PSYCHO_PCIAFSR_PTA) ? 324 "Target Abort" : 325 ((error_bits & PSYCHO_PCIAFSR_PRTRY) ? 326 "Excessive Retries" : 327 ((error_bits & PSYCHO_PCIAFSR_PPERR) ? 328 "Parity Error" : "???")))))); 329 printk(KERN_ERR "%s: bytemask[%04llx] UPA_MID[%02llx] was_block(%d)\n", 330 pbm->name, 331 (afsr & PSYCHO_PCIAFSR_BMSK) >> 32UL, 332 (afsr & PSYCHO_PCIAFSR_MID) >> 25UL, 333 (afsr & PSYCHO_PCIAFSR_BLK) ? 1 : 0); 334 printk(KERN_ERR "%s: PCI AFAR [%016llx]\n", pbm->name, afar); 335 printk(KERN_ERR "%s: PCI Secondary errors [", pbm->name); 336 reported = 0; 337 if (afsr & PSYCHO_PCIAFSR_SMA) { 338 reported++; 339 printk("(Master Abort)"); 340 } 341 if (afsr & PSYCHO_PCIAFSR_STA) { 342 reported++; 343 printk("(Target Abort)"); 344 } 345 if (afsr & PSYCHO_PCIAFSR_SRTRY) { 346 reported++; 347 printk("(Excessive Retries)"); 348 } 349 if (afsr & PSYCHO_PCIAFSR_SPERR) { 350 reported++; 351 printk("(Parity Error)"); 352 } 353 if (!reported) 354 printk("(none)"); 355 printk("]\n"); 356 357 if (error_bits & (PSYCHO_PCIAFSR_PTA | PSYCHO_PCIAFSR_STA)) { 358 psycho_check_iommu_error(pbm, afsr, afar, PCI_ERR); 359 pci_scan_for_target_abort(pbm, pbm->pci_bus); 360 } 361 if (error_bits & (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_SMA)) 362 pci_scan_for_master_abort(pbm, pbm->pci_bus); 363 364 if (error_bits & (PSYCHO_PCIAFSR_PPERR | PSYCHO_PCIAFSR_SPERR)) 365 pci_scan_for_parity_error(pbm, pbm->pci_bus); 366 367 return IRQ_HANDLED; 368 } 369 370 static void psycho_iommu_flush(struct pci_pbm_info *pbm) 371 { 372 int i; 373 374 for (i = 0; i < 16; i++) { 375 unsigned long off = i * 8; 376 377 upa_writeq(0, pbm->controller_regs + PSYCHO_IOMMU_TAG + off); 378 upa_writeq(0, pbm->controller_regs + PSYCHO_IOMMU_DATA + off); 379 } 380 } 381 382 #define PSYCHO_IOMMU_CONTROL 0x0200UL 383 #define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL 384 #define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL 385 #define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL 386 #define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL 387 #define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL 388 #define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL 389 #define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL 390 #define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL 391 #define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL 392 #define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL 393 #define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL 394 #define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL 395 #define PSYCHO_IOMMU_FLUSH 0x0210UL 396 #define PSYCHO_IOMMU_TSBBASE 0x0208UL 397 398 int psycho_iommu_init(struct pci_pbm_info *pbm, int tsbsize, 399 u32 dvma_offset, u32 dma_mask, 400 unsigned long write_complete_offset) 401 { 402 struct iommu *iommu = pbm->iommu; 403 u64 control; 404 int err; 405 406 iommu->iommu_control = pbm->controller_regs + PSYCHO_IOMMU_CONTROL; 407 iommu->iommu_tsbbase = pbm->controller_regs + PSYCHO_IOMMU_TSBBASE; 408 iommu->iommu_flush = pbm->controller_regs + PSYCHO_IOMMU_FLUSH; 409 iommu->iommu_tags = pbm->controller_regs + PSYCHO_IOMMU_TAG; 410 iommu->write_complete_reg = (pbm->controller_regs + 411 write_complete_offset); 412 413 iommu->iommu_ctxflush = 0; 414 415 control = upa_readq(iommu->iommu_control); 416 control |= PSYCHO_IOMMU_CTRL_DENAB; 417 upa_writeq(control, iommu->iommu_control); 418 419 psycho_iommu_flush(pbm); 420 421 /* Leave diag mode enabled for full-flushing done in pci_iommu.c */ 422 err = iommu_table_init(iommu, tsbsize * 1024 * 8, 423 dvma_offset, dma_mask, pbm->numa_node); 424 if (err) 425 return err; 426 427 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase); 428 429 control = upa_readq(iommu->iommu_control); 430 control &= ~(PSYCHO_IOMMU_CTRL_TSBSZ | PSYCHO_IOMMU_CTRL_TBWSZ); 431 control |= PSYCHO_IOMMU_CTRL_ENAB; 432 433 switch (tsbsize) { 434 case 64: 435 control |= PSYCHO_IOMMU_TSBSZ_64K; 436 break; 437 case 128: 438 control |= PSYCHO_IOMMU_TSBSZ_128K; 439 break; 440 default: 441 return -EINVAL; 442 } 443 444 upa_writeq(control, iommu->iommu_control); 445 446 return 0; 447 448 } 449 450 void psycho_pbm_init_common(struct pci_pbm_info *pbm, struct platform_device *op, 451 const char *chip_name, int chip_type) 452 { 453 struct device_node *dp = op->dev.of_node; 454 455 pbm->name = dp->full_name; 456 pbm->numa_node = -1; 457 pbm->chip_type = chip_type; 458 pbm->chip_version = of_getintprop_default(dp, "version#", 0); 459 pbm->chip_revision = of_getintprop_default(dp, "module-revision#", 0); 460 pbm->op = op; 461 pbm->pci_ops = &sun4u_pci_ops; 462 pbm->config_space_reg_bits = 8; 463 pbm->index = pci_num_pbms++; 464 pci_get_pbm_props(pbm); 465 pci_determine_mem_io_space(pbm); 466 467 printk(KERN_INFO "%s: %s PCI Bus Module ver[%x:%x]\n", 468 pbm->name, chip_name, 469 pbm->chip_version, pbm->chip_revision); 470 } 471