1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 ** System Bus Adapter (SBA) I/O MMU manager 4 ** 5 ** (c) Copyright 2000-2004 Grant Grundler <grundler @ parisc-linux x org> 6 ** (c) Copyright 2004 Naresh Kumar Inna <knaresh at india x hp x com> 7 ** (c) Copyright 2000-2004 Hewlett-Packard Company 8 ** 9 ** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code) 10 ** 11 ** 12 ** 13 ** This module initializes the IOC (I/O Controller) found on B1000/C3000/ 14 ** J5000/J7000/N-class/L-class machines and their successors. 15 ** 16 ** FIXME: add DMA hint support programming in both sba and lba modules. 17 */ 18 19 #include <linux/types.h> 20 #include <linux/kernel.h> 21 #include <linux/spinlock.h> 22 #include <linux/slab.h> 23 #include <linux/init.h> 24 25 #include <linux/mm.h> 26 #include <linux/string.h> 27 #include <linux/pci.h> 28 #include <linux/scatterlist.h> 29 #include <linux/iommu-helper.h> 30 31 #include <asm/byteorder.h> 32 #include <asm/io.h> 33 #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ 34 35 #include <asm/hardware.h> /* for register_parisc_driver() stuff */ 36 37 #include <linux/proc_fs.h> 38 #include <linux/seq_file.h> 39 #include <linux/module.h> 40 41 #include <asm/ropes.h> 42 #include <asm/mckinley.h> /* for proc_mckinley_root */ 43 #include <asm/runway.h> /* for proc_runway_root */ 44 #include <asm/page.h> /* for PAGE0 */ 45 #include <asm/pdc.h> /* for PDC_MODEL_* */ 46 #include <asm/pdcpat.h> /* for is_pdc_pat() */ 47 #include <asm/parisc-device.h> 48 49 #include "iommu.h" 50 51 #define MODULE_NAME "SBA" 52 53 /* 54 ** The number of debug flags is a clue - this code is fragile. 55 ** Don't even think about messing with it unless you have 56 ** plenty of 710's to sacrifice to the computer gods. :^) 57 */ 58 #undef DEBUG_SBA_INIT 59 #undef DEBUG_SBA_RUN 60 #undef DEBUG_SBA_RUN_SG 61 #undef DEBUG_SBA_RESOURCE 62 #undef ASSERT_PDIR_SANITY 63 #undef DEBUG_LARGE_SG_ENTRIES 64 #undef DEBUG_DMB_TRAP 65 66 #ifdef DEBUG_SBA_INIT 67 #define DBG_INIT(x...) printk(x) 68 #else 69 #define DBG_INIT(x...) 70 #endif 71 72 #ifdef DEBUG_SBA_RUN 73 #define DBG_RUN(x...) printk(x) 74 #else 75 #define DBG_RUN(x...) 76 #endif 77 78 #ifdef DEBUG_SBA_RUN_SG 79 #define DBG_RUN_SG(x...) printk(x) 80 #else 81 #define DBG_RUN_SG(x...) 82 #endif 83 84 85 #ifdef DEBUG_SBA_RESOURCE 86 #define DBG_RES(x...) printk(x) 87 #else 88 #define DBG_RES(x...) 89 #endif 90 91 #define SBA_INLINE __inline__ 92 93 #define DEFAULT_DMA_HINT_REG 0 94 95 struct sba_device *sba_list; 96 EXPORT_SYMBOL_GPL(sba_list); 97 98 static unsigned long ioc_needs_fdc = 0; 99 100 /* global count of IOMMUs in the system */ 101 static unsigned int global_ioc_cnt = 0; 102 103 /* PA8700 (Piranha 2.2) bug workaround */ 104 static unsigned long piranha_bad_128k = 0; 105 106 /* Looks nice and keeps the compiler happy */ 107 #define SBA_DEV(d) ((struct sba_device *) (d)) 108 109 #ifdef CONFIG_AGP_PARISC 110 #define SBA_AGP_SUPPORT 111 #endif /*CONFIG_AGP_PARISC*/ 112 113 #ifdef SBA_AGP_SUPPORT 114 static int sba_reserve_agpgart = 1; 115 module_param(sba_reserve_agpgart, int, 0444); 116 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART"); 117 #endif 118 119 120 /************************************ 121 ** SBA register read and write support 122 ** 123 ** BE WARNED: register writes are posted. 124 ** (ie follow writes which must reach HW with a read) 125 ** 126 ** Superdome (in particular, REO) allows only 64-bit CSR accesses. 127 */ 128 #define READ_REG32(addr) readl(addr) 129 #define READ_REG64(addr) readq(addr) 130 #define WRITE_REG32(val, addr) writel((val), (addr)) 131 #define WRITE_REG64(val, addr) writeq((val), (addr)) 132 133 #ifdef CONFIG_64BIT 134 #define READ_REG(addr) READ_REG64(addr) 135 #define WRITE_REG(value, addr) WRITE_REG64(value, addr) 136 #else 137 #define READ_REG(addr) READ_REG32(addr) 138 #define WRITE_REG(value, addr) WRITE_REG32(value, addr) 139 #endif 140 141 #ifdef DEBUG_SBA_INIT 142 143 /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */ 144 145 /** 146 * sba_dump_ranges - debugging only - print ranges assigned to this IOA 147 * @hpa: base address of the sba 148 * 149 * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO 150 * IO Adapter (aka Bus Converter). 151 */ 152 static void 153 sba_dump_ranges(void __iomem *hpa) 154 { 155 DBG_INIT("SBA at 0x%p\n", hpa); 156 DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE)); 157 DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK)); 158 DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE)); 159 DBG_INIT("\n"); 160 DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE)); 161 DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK)); 162 DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE)); 163 } 164 165 /** 166 * sba_dump_tlb - debugging only - print IOMMU operating parameters 167 * @hpa: base address of the IOMMU 168 * 169 * Print the size/location of the IO MMU PDIR. 170 */ 171 static void sba_dump_tlb(void __iomem *hpa) 172 { 173 DBG_INIT("IO TLB at 0x%p\n", hpa); 174 DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE)); 175 DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK)); 176 DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG)); 177 DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE)); 178 DBG_INIT("\n"); 179 } 180 #else 181 #define sba_dump_ranges(x) 182 #define sba_dump_tlb(x) 183 #endif /* DEBUG_SBA_INIT */ 184 185 186 #ifdef ASSERT_PDIR_SANITY 187 188 /** 189 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry 190 * @ioc: IO MMU structure which owns the pdir we are interested in. 191 * @msg: text to print ont the output line. 192 * @pide: pdir index. 193 * 194 * Print one entry of the IO MMU PDIR in human readable form. 195 */ 196 static void 197 sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide) 198 { 199 /* start printing from lowest pde in rval */ 200 u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]); 201 unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]); 202 uint rcnt; 203 204 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n", 205 msg, 206 rptr, pide & (BITS_PER_LONG - 1), *rptr); 207 208 rcnt = 0; 209 while (rcnt < BITS_PER_LONG) { 210 printk(KERN_DEBUG "%s %2d %p %016Lx\n", 211 (rcnt == (pide & (BITS_PER_LONG - 1))) 212 ? " -->" : " ", 213 rcnt, ptr, *ptr ); 214 rcnt++; 215 ptr++; 216 } 217 printk(KERN_DEBUG "%s", msg); 218 } 219 220 221 /** 222 * sba_check_pdir - debugging only - consistency checker 223 * @ioc: IO MMU structure which owns the pdir we are interested in. 224 * @msg: text to print ont the output line. 225 * 226 * Verify the resource map and pdir state is consistent 227 */ 228 static int 229 sba_check_pdir(struct ioc *ioc, char *msg) 230 { 231 u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]); 232 u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */ 233 u64 *pptr = ioc->pdir_base; /* pdir ptr */ 234 uint pide = 0; 235 236 while (rptr < rptr_end) { 237 u32 rval = *rptr; 238 int rcnt = 32; /* number of bits we might check */ 239 240 while (rcnt) { 241 /* Get last byte and highest bit from that */ 242 u32 pde = ((u32) (((char *)pptr)[7])) << 24; 243 if ((rval ^ pde) & 0x80000000) 244 { 245 /* 246 ** BUMMER! -- res_map != pdir -- 247 ** Dump rval and matching pdir entries 248 */ 249 sba_dump_pdir_entry(ioc, msg, pide); 250 return(1); 251 } 252 rcnt--; 253 rval <<= 1; /* try the next bit */ 254 pptr++; 255 pide++; 256 } 257 rptr++; /* look at next word of res_map */ 258 } 259 /* It'd be nice if we always got here :^) */ 260 return 0; 261 } 262 263 264 /** 265 * sba_dump_sg - debugging only - print Scatter-Gather list 266 * @ioc: IO MMU structure which owns the pdir we are interested in. 267 * @startsg: head of the SG list 268 * @nents: number of entries in SG list 269 * 270 * print the SG list so we can verify it's correct by hand. 271 */ 272 static void 273 sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents) 274 { 275 while (nents-- > 0) { 276 printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n", 277 nents, 278 (unsigned long) sg_dma_address(startsg), 279 sg_dma_len(startsg), 280 sg_virt(startsg), startsg->length); 281 startsg++; 282 } 283 } 284 285 #endif /* ASSERT_PDIR_SANITY */ 286 287 288 289 290 /************************************************************** 291 * 292 * I/O Pdir Resource Management 293 * 294 * Bits set in the resource map are in use. 295 * Each bit can represent a number of pages. 296 * LSbs represent lower addresses (IOVA's). 297 * 298 ***************************************************************/ 299 #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */ 300 301 /* Convert from IOVP to IOVA and vice versa. */ 302 303 #ifdef ZX1_SUPPORT 304 /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */ 305 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset)) 306 #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask) 307 #else 308 /* only support Astro and ancestors. Saves a few cycles in key places */ 309 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset)) 310 #define SBA_IOVP(ioc,iova) (iova) 311 #endif 312 313 #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT) 314 315 #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n))) 316 #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1) 317 318 static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr, 319 unsigned int bitshiftcnt) 320 { 321 return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3) 322 + bitshiftcnt; 323 } 324 325 /** 326 * sba_search_bitmap - find free space in IO PDIR resource bitmap 327 * @ioc: IO MMU structure which owns the pdir we are interested in. 328 * @bits_wanted: number of entries we need. 329 * 330 * Find consecutive free bits in resource bitmap. 331 * Each bit represents one entry in the IO Pdir. 332 * Cool perf optimization: search for log2(size) bits at a time. 333 */ 334 static SBA_INLINE unsigned long 335 sba_search_bitmap(struct ioc *ioc, struct device *dev, 336 unsigned long bits_wanted) 337 { 338 unsigned long *res_ptr = ioc->res_hint; 339 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]); 340 unsigned long pide = ~0UL, tpide; 341 unsigned long boundary_size; 342 unsigned long shift; 343 int ret; 344 345 boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1, 346 1ULL << IOVP_SHIFT) >> IOVP_SHIFT; 347 348 #if defined(ZX1_SUPPORT) 349 BUG_ON(ioc->ibase & ~IOVP_MASK); 350 shift = ioc->ibase >> IOVP_SHIFT; 351 #else 352 shift = 0; 353 #endif 354 355 if (bits_wanted > (BITS_PER_LONG/2)) { 356 /* Search word at a time - no mask needed */ 357 for(; res_ptr < res_end; ++res_ptr) { 358 tpide = ptr_to_pide(ioc, res_ptr, 0); 359 ret = iommu_is_span_boundary(tpide, bits_wanted, 360 shift, 361 boundary_size); 362 if ((*res_ptr == 0) && !ret) { 363 *res_ptr = RESMAP_MASK(bits_wanted); 364 pide = tpide; 365 break; 366 } 367 } 368 /* point to the next word on next pass */ 369 res_ptr++; 370 ioc->res_bitshift = 0; 371 } else { 372 /* 373 ** Search the resource bit map on well-aligned values. 374 ** "o" is the alignment. 375 ** We need the alignment to invalidate I/O TLB using 376 ** SBA HW features in the unmap path. 377 */ 378 unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT); 379 uint bitshiftcnt = ALIGN(ioc->res_bitshift, o); 380 unsigned long mask; 381 382 if (bitshiftcnt >= BITS_PER_LONG) { 383 bitshiftcnt = 0; 384 res_ptr++; 385 } 386 mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt; 387 388 DBG_RES("%s() o %ld %p", __func__, o, res_ptr); 389 while(res_ptr < res_end) 390 { 391 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr); 392 WARN_ON(mask == 0); 393 tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt); 394 ret = iommu_is_span_boundary(tpide, bits_wanted, 395 shift, 396 boundary_size); 397 if ((((*res_ptr) & mask) == 0) && !ret) { 398 *res_ptr |= mask; /* mark resources busy! */ 399 pide = tpide; 400 break; 401 } 402 mask >>= o; 403 bitshiftcnt += o; 404 if (mask == 0) { 405 mask = RESMAP_MASK(bits_wanted); 406 bitshiftcnt=0; 407 res_ptr++; 408 } 409 } 410 /* look in the same word on the next pass */ 411 ioc->res_bitshift = bitshiftcnt + bits_wanted; 412 } 413 414 /* wrapped ? */ 415 if (res_end <= res_ptr) { 416 ioc->res_hint = (unsigned long *) ioc->res_map; 417 ioc->res_bitshift = 0; 418 } else { 419 ioc->res_hint = res_ptr; 420 } 421 return (pide); 422 } 423 424 425 /** 426 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap 427 * @ioc: IO MMU structure which owns the pdir we are interested in. 428 * @size: number of bytes to create a mapping for 429 * 430 * Given a size, find consecutive unmarked and then mark those bits in the 431 * resource bit map. 432 */ 433 static int 434 sba_alloc_range(struct ioc *ioc, struct device *dev, size_t size) 435 { 436 unsigned int pages_needed = size >> IOVP_SHIFT; 437 #ifdef SBA_COLLECT_STATS 438 unsigned long cr_start = mfctl(16); 439 #endif 440 unsigned long pide; 441 442 pide = sba_search_bitmap(ioc, dev, pages_needed); 443 if (pide >= (ioc->res_size << 3)) { 444 pide = sba_search_bitmap(ioc, dev, pages_needed); 445 if (pide >= (ioc->res_size << 3)) 446 panic("%s: I/O MMU @ %p is out of mapping resources\n", 447 __FILE__, ioc->ioc_hpa); 448 } 449 450 #ifdef ASSERT_PDIR_SANITY 451 /* verify the first enable bit is clear */ 452 if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) { 453 sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide); 454 } 455 #endif 456 457 DBG_RES("%s(%x) %d -> %lx hint %x/%x\n", 458 __func__, size, pages_needed, pide, 459 (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map), 460 ioc->res_bitshift ); 461 462 #ifdef SBA_COLLECT_STATS 463 { 464 unsigned long cr_end = mfctl(16); 465 unsigned long tmp = cr_end - cr_start; 466 /* check for roll over */ 467 cr_start = (cr_end < cr_start) ? -(tmp) : (tmp); 468 } 469 ioc->avg_search[ioc->avg_idx++] = cr_start; 470 ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1; 471 472 ioc->used_pages += pages_needed; 473 #endif 474 475 return (pide); 476 } 477 478 479 /** 480 * sba_free_range - unmark bits in IO PDIR resource bitmap 481 * @ioc: IO MMU structure which owns the pdir we are interested in. 482 * @iova: IO virtual address which was previously allocated. 483 * @size: number of bytes to create a mapping for 484 * 485 * clear bits in the ioc's resource map 486 */ 487 static SBA_INLINE void 488 sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size) 489 { 490 unsigned long iovp = SBA_IOVP(ioc, iova); 491 unsigned int pide = PDIR_INDEX(iovp); 492 unsigned int ridx = pide >> 3; /* convert bit to byte address */ 493 unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]); 494 495 int bits_not_wanted = size >> IOVP_SHIFT; 496 497 /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */ 498 unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1)); 499 500 DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n", 501 __func__, (uint) iova, size, 502 bits_not_wanted, m, pide, res_ptr, *res_ptr); 503 504 #ifdef SBA_COLLECT_STATS 505 ioc->used_pages -= bits_not_wanted; 506 #endif 507 508 *res_ptr &= ~m; 509 } 510 511 512 /************************************************************** 513 * 514 * "Dynamic DMA Mapping" support (aka "Coherent I/O") 515 * 516 ***************************************************************/ 517 518 #ifdef SBA_HINT_SUPPORT 519 #define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir) 520 #endif 521 522 typedef unsigned long space_t; 523 #define KERNEL_SPACE 0 524 525 /** 526 * sba_io_pdir_entry - fill in one IO PDIR entry 527 * @pdir_ptr: pointer to IO PDIR entry 528 * @sid: process Space ID - currently only support KERNEL_SPACE 529 * @vba: Virtual CPU address of buffer to map 530 * @hint: DMA hint set to use for this mapping 531 * 532 * SBA Mapping Routine 533 * 534 * Given a virtual address (vba, arg2) and space id, (sid, arg1) 535 * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by 536 * pdir_ptr (arg0). 537 * Using the bass-ackwards HP bit numbering, Each IO Pdir entry 538 * for Astro/Ike looks like: 539 * 540 * 541 * 0 19 51 55 63 542 * +-+---------------------+----------------------------------+----+--------+ 543 * |V| U | PPN[43:12] | U | VI | 544 * +-+---------------------+----------------------------------+----+--------+ 545 * 546 * Pluto is basically identical, supports fewer physical address bits: 547 * 548 * 0 23 51 55 63 549 * +-+------------------------+-------------------------------+----+--------+ 550 * |V| U | PPN[39:12] | U | VI | 551 * +-+------------------------+-------------------------------+----+--------+ 552 * 553 * V == Valid Bit (Most Significant Bit is bit 0) 554 * U == Unused 555 * PPN == Physical Page Number 556 * VI == Virtual Index (aka Coherent Index) 557 * 558 * LPA instruction output is put into PPN field. 559 * LCI (Load Coherence Index) instruction provides the "VI" bits. 560 * 561 * We pre-swap the bytes since PCX-W is Big Endian and the 562 * IOMMU uses little endian for the pdir. 563 */ 564 565 static void SBA_INLINE 566 sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba, 567 unsigned long hint) 568 { 569 u64 pa; /* physical address */ 570 register unsigned ci; /* coherent index */ 571 572 pa = lpa(vba); 573 pa &= IOVP_MASK; 574 575 asm("lci 0(%1), %0" : "=r" (ci) : "r" (vba)); 576 pa |= (ci >> PAGE_SHIFT) & 0xff; /* move CI (8 bits) into lowest byte */ 577 578 pa |= SBA_PDIR_VALID_BIT; /* set "valid" bit */ 579 *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */ 580 581 /* 582 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 583 * (bit #61, big endian), we have to flush and sync every time 584 * IO-PDIR is changed in Ike/Astro. 585 */ 586 asm_io_fdc(pdir_ptr); 587 } 588 589 590 /** 591 * sba_mark_invalid - invalidate one or more IO PDIR entries 592 * @ioc: IO MMU structure which owns the pdir we are interested in. 593 * @iova: IO Virtual Address mapped earlier 594 * @byte_cnt: number of bytes this mapping covers. 595 * 596 * Marking the IO PDIR entry(ies) as Invalid and invalidate 597 * corresponding IO TLB entry. The Ike PCOM (Purge Command Register) 598 * is to purge stale entries in the IO TLB when unmapping entries. 599 * 600 * The PCOM register supports purging of multiple pages, with a minium 601 * of 1 page and a maximum of 2GB. Hardware requires the address be 602 * aligned to the size of the range being purged. The size of the range 603 * must be a power of 2. The "Cool perf optimization" in the 604 * allocation routine helps keep that true. 605 */ 606 static SBA_INLINE void 607 sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt) 608 { 609 u32 iovp = (u32) SBA_IOVP(ioc,iova); 610 u64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)]; 611 612 #ifdef ASSERT_PDIR_SANITY 613 /* Assert first pdir entry is set. 614 ** 615 ** Even though this is a big-endian machine, the entries 616 ** in the iopdir are little endian. That's why we look at 617 ** the byte at +7 instead of at +0. 618 */ 619 if (0x80 != (((u8 *) pdir_ptr)[7])) { 620 sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp)); 621 } 622 #endif 623 624 if (byte_cnt > IOVP_SIZE) 625 { 626 #if 0 627 unsigned long entries_per_cacheline = ioc_needs_fdc ? 628 L1_CACHE_ALIGN(((unsigned long) pdir_ptr)) 629 - (unsigned long) pdir_ptr; 630 : 262144; 631 #endif 632 633 /* set "size" field for PCOM */ 634 iovp |= get_order(byte_cnt) + PAGE_SHIFT; 635 636 do { 637 /* clear I/O Pdir entry "valid" bit first */ 638 ((u8 *) pdir_ptr)[7] = 0; 639 asm_io_fdc(pdir_ptr); 640 if (ioc_needs_fdc) { 641 #if 0 642 entries_per_cacheline = L1_CACHE_SHIFT - 3; 643 #endif 644 } 645 pdir_ptr++; 646 byte_cnt -= IOVP_SIZE; 647 } while (byte_cnt > IOVP_SIZE); 648 } else 649 iovp |= IOVP_SHIFT; /* set "size" field for PCOM */ 650 651 /* 652 ** clear I/O PDIR entry "valid" bit. 653 ** We have to R/M/W the cacheline regardless how much of the 654 ** pdir entry that we clobber. 655 ** The rest of the entry would be useful for debugging if we 656 ** could dump core on HPMC. 657 */ 658 ((u8 *) pdir_ptr)[7] = 0; 659 asm_io_fdc(pdir_ptr); 660 661 WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM); 662 } 663 664 /** 665 * sba_dma_supported - PCI driver can query DMA support 666 * @dev: instance of PCI owned by the driver that's asking 667 * @mask: number of address bits this PCI device can handle 668 * 669 * See Documentation/DMA-API-HOWTO.txt 670 */ 671 static int sba_dma_supported( struct device *dev, u64 mask) 672 { 673 struct ioc *ioc; 674 675 if (dev == NULL) { 676 printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n"); 677 BUG(); 678 return(0); 679 } 680 681 /* Documentation/DMA-API-HOWTO.txt tells drivers to try 64-bit 682 * first, then fall back to 32-bit if that fails. 683 * We are just "encouraging" 32-bit DMA masks here since we can 684 * never allow IOMMU bypass unless we add special support for ZX1. 685 */ 686 if (mask > ~0U) 687 return 0; 688 689 ioc = GET_IOC(dev); 690 if (!ioc) 691 return 0; 692 693 /* 694 * check if mask is >= than the current max IO Virt Address 695 * The max IO Virt address will *always* < 30 bits. 696 */ 697 return((int)(mask >= (ioc->ibase - 1 + 698 (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) ))); 699 } 700 701 702 /** 703 * sba_map_single - map one buffer and return IOVA for DMA 704 * @dev: instance of PCI owned by the driver that's asking. 705 * @addr: driver buffer to map. 706 * @size: number of bytes to map in driver buffer. 707 * @direction: R/W or both. 708 * 709 * See Documentation/DMA-API-HOWTO.txt 710 */ 711 static dma_addr_t 712 sba_map_single(struct device *dev, void *addr, size_t size, 713 enum dma_data_direction direction) 714 { 715 struct ioc *ioc; 716 unsigned long flags; 717 dma_addr_t iovp; 718 dma_addr_t offset; 719 u64 *pdir_start; 720 int pide; 721 722 ioc = GET_IOC(dev); 723 if (!ioc) 724 return DMA_MAPPING_ERROR; 725 726 /* save offset bits */ 727 offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK; 728 729 /* round up to nearest IOVP_SIZE */ 730 size = (size + offset + ~IOVP_MASK) & IOVP_MASK; 731 732 spin_lock_irqsave(&ioc->res_lock, flags); 733 #ifdef ASSERT_PDIR_SANITY 734 sba_check_pdir(ioc,"Check before sba_map_single()"); 735 #endif 736 737 #ifdef SBA_COLLECT_STATS 738 ioc->msingle_calls++; 739 ioc->msingle_pages += size >> IOVP_SHIFT; 740 #endif 741 pide = sba_alloc_range(ioc, dev, size); 742 iovp = (dma_addr_t) pide << IOVP_SHIFT; 743 744 DBG_RUN("%s() 0x%p -> 0x%lx\n", 745 __func__, addr, (long) iovp | offset); 746 747 pdir_start = &(ioc->pdir_base[pide]); 748 749 while (size > 0) { 750 sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0); 751 752 DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n", 753 pdir_start, 754 (u8) (((u8 *) pdir_start)[7]), 755 (u8) (((u8 *) pdir_start)[6]), 756 (u8) (((u8 *) pdir_start)[5]), 757 (u8) (((u8 *) pdir_start)[4]), 758 (u8) (((u8 *) pdir_start)[3]), 759 (u8) (((u8 *) pdir_start)[2]), 760 (u8) (((u8 *) pdir_start)[1]), 761 (u8) (((u8 *) pdir_start)[0]) 762 ); 763 764 addr += IOVP_SIZE; 765 size -= IOVP_SIZE; 766 pdir_start++; 767 } 768 769 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 770 asm_io_sync(); 771 772 #ifdef ASSERT_PDIR_SANITY 773 sba_check_pdir(ioc,"Check after sba_map_single()"); 774 #endif 775 spin_unlock_irqrestore(&ioc->res_lock, flags); 776 777 /* form complete address */ 778 return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG); 779 } 780 781 782 static dma_addr_t 783 sba_map_page(struct device *dev, struct page *page, unsigned long offset, 784 size_t size, enum dma_data_direction direction, 785 unsigned long attrs) 786 { 787 return sba_map_single(dev, page_address(page) + offset, size, 788 direction); 789 } 790 791 792 /** 793 * sba_unmap_page - unmap one IOVA and free resources 794 * @dev: instance of PCI owned by the driver that's asking. 795 * @iova: IOVA of driver buffer previously mapped. 796 * @size: number of bytes mapped in driver buffer. 797 * @direction: R/W or both. 798 * 799 * See Documentation/DMA-API-HOWTO.txt 800 */ 801 static void 802 sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 803 enum dma_data_direction direction, unsigned long attrs) 804 { 805 struct ioc *ioc; 806 #if DELAYED_RESOURCE_CNT > 0 807 struct sba_dma_pair *d; 808 #endif 809 unsigned long flags; 810 dma_addr_t offset; 811 812 DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size); 813 814 ioc = GET_IOC(dev); 815 if (!ioc) { 816 WARN_ON(!ioc); 817 return; 818 } 819 offset = iova & ~IOVP_MASK; 820 iova ^= offset; /* clear offset bits */ 821 size += offset; 822 size = ALIGN(size, IOVP_SIZE); 823 824 spin_lock_irqsave(&ioc->res_lock, flags); 825 826 #ifdef SBA_COLLECT_STATS 827 ioc->usingle_calls++; 828 ioc->usingle_pages += size >> IOVP_SHIFT; 829 #endif 830 831 sba_mark_invalid(ioc, iova, size); 832 833 #if DELAYED_RESOURCE_CNT > 0 834 /* Delaying when we re-use a IO Pdir entry reduces the number 835 * of MMIO reads needed to flush writes to the PCOM register. 836 */ 837 d = &(ioc->saved[ioc->saved_cnt]); 838 d->iova = iova; 839 d->size = size; 840 if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) { 841 int cnt = ioc->saved_cnt; 842 while (cnt--) { 843 sba_free_range(ioc, d->iova, d->size); 844 d--; 845 } 846 ioc->saved_cnt = 0; 847 848 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 849 } 850 #else /* DELAYED_RESOURCE_CNT == 0 */ 851 sba_free_range(ioc, iova, size); 852 853 /* If fdc's were issued, force fdc's to be visible now */ 854 asm_io_sync(); 855 856 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 857 #endif /* DELAYED_RESOURCE_CNT == 0 */ 858 859 spin_unlock_irqrestore(&ioc->res_lock, flags); 860 861 /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support. 862 ** For Astro based systems this isn't a big deal WRT performance. 863 ** As long as 2.4 kernels copyin/copyout data from/to userspace, 864 ** we don't need the syncdma. The issue here is I/O MMU cachelines 865 ** are *not* coherent in all cases. May be hwrev dependent. 866 ** Need to investigate more. 867 asm volatile("syncdma"); 868 */ 869 } 870 871 872 /** 873 * sba_alloc - allocate/map shared mem for DMA 874 * @hwdev: instance of PCI owned by the driver that's asking. 875 * @size: number of bytes mapped in driver buffer. 876 * @dma_handle: IOVA of new buffer. 877 * 878 * See Documentation/DMA-API-HOWTO.txt 879 */ 880 static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, 881 gfp_t gfp, unsigned long attrs) 882 { 883 void *ret; 884 885 if (!hwdev) { 886 /* only support PCI */ 887 *dma_handle = 0; 888 return NULL; 889 } 890 891 ret = (void *) __get_free_pages(gfp, get_order(size)); 892 893 if (ret) { 894 memset(ret, 0, size); 895 *dma_handle = sba_map_single(hwdev, ret, size, 0); 896 } 897 898 return ret; 899 } 900 901 902 /** 903 * sba_free - free/unmap shared mem for DMA 904 * @hwdev: instance of PCI owned by the driver that's asking. 905 * @size: number of bytes mapped in driver buffer. 906 * @vaddr: virtual address IOVA of "consistent" buffer. 907 * @dma_handler: IO virtual address of "consistent" buffer. 908 * 909 * See Documentation/DMA-API-HOWTO.txt 910 */ 911 static void 912 sba_free(struct device *hwdev, size_t size, void *vaddr, 913 dma_addr_t dma_handle, unsigned long attrs) 914 { 915 sba_unmap_page(hwdev, dma_handle, size, 0, 0); 916 free_pages((unsigned long) vaddr, get_order(size)); 917 } 918 919 920 /* 921 ** Since 0 is a valid pdir_base index value, can't use that 922 ** to determine if a value is valid or not. Use a flag to indicate 923 ** the SG list entry contains a valid pdir index. 924 */ 925 #define PIDE_FLAG 0x80000000UL 926 927 #ifdef SBA_COLLECT_STATS 928 #define IOMMU_MAP_STATS 929 #endif 930 #include "iommu-helpers.h" 931 932 #ifdef DEBUG_LARGE_SG_ENTRIES 933 int dump_run_sg = 0; 934 #endif 935 936 937 /** 938 * sba_map_sg - map Scatter/Gather list 939 * @dev: instance of PCI owned by the driver that's asking. 940 * @sglist: array of buffer/length pairs 941 * @nents: number of entries in list 942 * @direction: R/W or both. 943 * 944 * See Documentation/DMA-API-HOWTO.txt 945 */ 946 static int 947 sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, 948 enum dma_data_direction direction, unsigned long attrs) 949 { 950 struct ioc *ioc; 951 int coalesced, filled = 0; 952 unsigned long flags; 953 954 DBG_RUN_SG("%s() START %d entries\n", __func__, nents); 955 956 ioc = GET_IOC(dev); 957 if (!ioc) 958 return 0; 959 960 /* Fast path single entry scatterlists. */ 961 if (nents == 1) { 962 sg_dma_address(sglist) = sba_map_single(dev, sg_virt(sglist), 963 sglist->length, direction); 964 sg_dma_len(sglist) = sglist->length; 965 return 1; 966 } 967 968 spin_lock_irqsave(&ioc->res_lock, flags); 969 970 #ifdef ASSERT_PDIR_SANITY 971 if (sba_check_pdir(ioc,"Check before sba_map_sg()")) 972 { 973 sba_dump_sg(ioc, sglist, nents); 974 panic("Check before sba_map_sg()"); 975 } 976 #endif 977 978 #ifdef SBA_COLLECT_STATS 979 ioc->msg_calls++; 980 #endif 981 982 /* 983 ** First coalesce the chunks and allocate I/O pdir space 984 ** 985 ** If this is one DMA stream, we can properly map using the 986 ** correct virtual address associated with each DMA page. 987 ** w/o this association, we wouldn't have coherent DMA! 988 ** Access to the virtual address is what forces a two pass algorithm. 989 */ 990 coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents, sba_alloc_range); 991 992 /* 993 ** Program the I/O Pdir 994 ** 995 ** map the virtual addresses to the I/O Pdir 996 ** o dma_address will contain the pdir index 997 ** o dma_len will contain the number of bytes to map 998 ** o address contains the virtual address. 999 */ 1000 filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry); 1001 1002 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 1003 asm_io_sync(); 1004 1005 #ifdef ASSERT_PDIR_SANITY 1006 if (sba_check_pdir(ioc,"Check after sba_map_sg()")) 1007 { 1008 sba_dump_sg(ioc, sglist, nents); 1009 panic("Check after sba_map_sg()\n"); 1010 } 1011 #endif 1012 1013 spin_unlock_irqrestore(&ioc->res_lock, flags); 1014 1015 DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled); 1016 1017 return filled; 1018 } 1019 1020 1021 /** 1022 * sba_unmap_sg - unmap Scatter/Gather list 1023 * @dev: instance of PCI owned by the driver that's asking. 1024 * @sglist: array of buffer/length pairs 1025 * @nents: number of entries in list 1026 * @direction: R/W or both. 1027 * 1028 * See Documentation/DMA-API-HOWTO.txt 1029 */ 1030 static void 1031 sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, 1032 enum dma_data_direction direction, unsigned long attrs) 1033 { 1034 struct ioc *ioc; 1035 #ifdef ASSERT_PDIR_SANITY 1036 unsigned long flags; 1037 #endif 1038 1039 DBG_RUN_SG("%s() START %d entries, %p,%x\n", 1040 __func__, nents, sg_virt(sglist), sglist->length); 1041 1042 ioc = GET_IOC(dev); 1043 if (!ioc) { 1044 WARN_ON(!ioc); 1045 return; 1046 } 1047 1048 #ifdef SBA_COLLECT_STATS 1049 ioc->usg_calls++; 1050 #endif 1051 1052 #ifdef ASSERT_PDIR_SANITY 1053 spin_lock_irqsave(&ioc->res_lock, flags); 1054 sba_check_pdir(ioc,"Check before sba_unmap_sg()"); 1055 spin_unlock_irqrestore(&ioc->res_lock, flags); 1056 #endif 1057 1058 while (sg_dma_len(sglist) && nents--) { 1059 1060 sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist), 1061 direction, 0); 1062 #ifdef SBA_COLLECT_STATS 1063 ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT; 1064 ioc->usingle_calls--; /* kluge since call is unmap_sg() */ 1065 #endif 1066 ++sglist; 1067 } 1068 1069 DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents); 1070 1071 #ifdef ASSERT_PDIR_SANITY 1072 spin_lock_irqsave(&ioc->res_lock, flags); 1073 sba_check_pdir(ioc,"Check after sba_unmap_sg()"); 1074 spin_unlock_irqrestore(&ioc->res_lock, flags); 1075 #endif 1076 1077 } 1078 1079 static const struct dma_map_ops sba_ops = { 1080 .dma_supported = sba_dma_supported, 1081 .alloc = sba_alloc, 1082 .free = sba_free, 1083 .map_page = sba_map_page, 1084 .unmap_page = sba_unmap_page, 1085 .map_sg = sba_map_sg, 1086 .unmap_sg = sba_unmap_sg, 1087 .get_sgtable = dma_common_get_sgtable, 1088 }; 1089 1090 1091 /************************************************************************** 1092 ** 1093 ** SBA PAT PDC support 1094 ** 1095 ** o call pdc_pat_cell_module() 1096 ** o store ranges in PCI "resource" structures 1097 ** 1098 **************************************************************************/ 1099 1100 static void 1101 sba_get_pat_resources(struct sba_device *sba_dev) 1102 { 1103 #if 0 1104 /* 1105 ** TODO/REVISIT/FIXME: support for directed ranges requires calls to 1106 ** PAT PDC to program the SBA/LBA directed range registers...this 1107 ** burden may fall on the LBA code since it directly supports the 1108 ** PCI subsystem. It's not clear yet. - ggg 1109 */ 1110 PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp); 1111 FIXME : ??? 1112 PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp); 1113 Tells where the dvi bits are located in the address. 1114 PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp); 1115 FIXME : ??? 1116 #endif 1117 } 1118 1119 1120 /************************************************************** 1121 * 1122 * Initialization and claim 1123 * 1124 ***************************************************************/ 1125 #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */ 1126 #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */ 1127 static void * 1128 sba_alloc_pdir(unsigned int pdir_size) 1129 { 1130 unsigned long pdir_base; 1131 unsigned long pdir_order = get_order(pdir_size); 1132 1133 pdir_base = __get_free_pages(GFP_KERNEL, pdir_order); 1134 if (NULL == (void *) pdir_base) { 1135 panic("%s() could not allocate I/O Page Table\n", 1136 __func__); 1137 } 1138 1139 /* If this is not PA8700 (PCX-W2) 1140 ** OR newer than ver 2.2 1141 ** OR in a system that doesn't need VINDEX bits from SBA, 1142 ** 1143 ** then we aren't exposed to the HW bug. 1144 */ 1145 if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13 1146 || (boot_cpu_data.pdc.versions > 0x202) 1147 || (boot_cpu_data.pdc.capabilities & 0x08L) ) 1148 return (void *) pdir_base; 1149 1150 /* 1151 * PA8700 (PCX-W2, aka piranha) silent data corruption fix 1152 * 1153 * An interaction between PA8700 CPU (Ver 2.2 or older) and 1154 * Ike/Astro can cause silent data corruption. This is only 1155 * a problem if the I/O PDIR is located in memory such that 1156 * (little-endian) bits 17 and 18 are on and bit 20 is off. 1157 * 1158 * Since the max IO Pdir size is 2MB, by cleverly allocating the 1159 * right physical address, we can either avoid (IOPDIR <= 1MB) 1160 * or minimize (2MB IO Pdir) the problem if we restrict the 1161 * IO Pdir to a maximum size of 2MB-128K (1902K). 1162 * 1163 * Because we always allocate 2^N sized IO pdirs, either of the 1164 * "bad" regions will be the last 128K if at all. That's easy 1165 * to test for. 1166 * 1167 */ 1168 if (pdir_order <= (19-12)) { 1169 if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) { 1170 /* allocate a new one on 512k alignment */ 1171 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12)); 1172 /* release original */ 1173 free_pages(pdir_base, pdir_order); 1174 1175 pdir_base = new_pdir; 1176 1177 /* release excess */ 1178 while (pdir_order < (19-12)) { 1179 new_pdir += pdir_size; 1180 free_pages(new_pdir, pdir_order); 1181 pdir_order +=1; 1182 pdir_size <<=1; 1183 } 1184 } 1185 } else { 1186 /* 1187 ** 1MB or 2MB Pdir 1188 ** Needs to be aligned on an "odd" 1MB boundary. 1189 */ 1190 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */ 1191 1192 /* release original */ 1193 free_pages( pdir_base, pdir_order); 1194 1195 /* release first 1MB */ 1196 free_pages(new_pdir, 20-12); 1197 1198 pdir_base = new_pdir + 1024*1024; 1199 1200 if (pdir_order > (20-12)) { 1201 /* 1202 ** 2MB Pdir. 1203 ** 1204 ** Flag tells init_bitmap() to mark bad 128k as used 1205 ** and to reduce the size by 128k. 1206 */ 1207 piranha_bad_128k = 1; 1208 1209 new_pdir += 3*1024*1024; 1210 /* release last 1MB */ 1211 free_pages(new_pdir, 20-12); 1212 1213 /* release unusable 128KB */ 1214 free_pages(new_pdir - 128*1024 , 17-12); 1215 1216 pdir_size -= 128*1024; 1217 } 1218 } 1219 1220 memset((void *) pdir_base, 0, pdir_size); 1221 return (void *) pdir_base; 1222 } 1223 1224 struct ibase_data_struct { 1225 struct ioc *ioc; 1226 int ioc_num; 1227 }; 1228 1229 static int setup_ibase_imask_callback(struct device *dev, void *data) 1230 { 1231 /* lba_set_iregs() is in drivers/parisc/lba_pci.c */ 1232 extern void lba_set_iregs(struct parisc_device *, u32, u32); 1233 struct parisc_device *lba = to_parisc_device(dev); 1234 struct ibase_data_struct *ibd = data; 1235 int rope_num = (lba->hpa.start >> 13) & 0xf; 1236 if (rope_num >> 3 == ibd->ioc_num) 1237 lba_set_iregs(lba, ibd->ioc->ibase, ibd->ioc->imask); 1238 return 0; 1239 } 1240 1241 /* setup Mercury or Elroy IBASE/IMASK registers. */ 1242 static void 1243 setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1244 { 1245 struct ibase_data_struct ibase_data = { 1246 .ioc = ioc, 1247 .ioc_num = ioc_num, 1248 }; 1249 1250 device_for_each_child(&sba->dev, &ibase_data, 1251 setup_ibase_imask_callback); 1252 } 1253 1254 #ifdef SBA_AGP_SUPPORT 1255 static int 1256 sba_ioc_find_quicksilver(struct device *dev, void *data) 1257 { 1258 int *agp_found = data; 1259 struct parisc_device *lba = to_parisc_device(dev); 1260 1261 if (IS_QUICKSILVER(lba)) 1262 *agp_found = 1; 1263 return 0; 1264 } 1265 #endif 1266 1267 static void 1268 sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1269 { 1270 u32 iova_space_mask; 1271 u32 iova_space_size; 1272 int iov_order, tcnfg; 1273 #ifdef SBA_AGP_SUPPORT 1274 int agp_found = 0; 1275 #endif 1276 /* 1277 ** Firmware programs the base and size of a "safe IOVA space" 1278 ** (one that doesn't overlap memory or LMMIO space) in the 1279 ** IBASE and IMASK registers. 1280 */ 1281 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE); 1282 iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; 1283 1284 if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) { 1285 printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n"); 1286 iova_space_size /= 2; 1287 } 1288 1289 /* 1290 ** iov_order is always based on a 1GB IOVA space since we want to 1291 ** turn on the other half for AGP GART. 1292 */ 1293 iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT)); 1294 ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64); 1295 1296 DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n", 1297 __func__, ioc->ioc_hpa, iova_space_size >> 20, 1298 iov_order + PAGE_SHIFT); 1299 1300 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL, 1301 get_order(ioc->pdir_size)); 1302 if (!ioc->pdir_base) 1303 panic("Couldn't allocate I/O Page Table\n"); 1304 1305 memset(ioc->pdir_base, 0, ioc->pdir_size); 1306 1307 DBG_INIT("%s() pdir %p size %x\n", 1308 __func__, ioc->pdir_base, ioc->pdir_size); 1309 1310 #ifdef SBA_HINT_SUPPORT 1311 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1312 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1313 1314 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1315 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1316 #endif 1317 1318 WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base); 1319 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1320 1321 /* build IMASK for IOC and Elroy */ 1322 iova_space_mask = 0xffffffff; 1323 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1324 ioc->imask = iova_space_mask; 1325 #ifdef ZX1_SUPPORT 1326 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1327 #endif 1328 sba_dump_tlb(ioc->ioc_hpa); 1329 1330 setup_ibase_imask(sba, ioc, ioc_num); 1331 1332 WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK); 1333 1334 #ifdef CONFIG_64BIT 1335 /* 1336 ** Setting the upper bits makes checking for bypass addresses 1337 ** a little faster later on. 1338 */ 1339 ioc->imask |= 0xFFFFFFFF00000000UL; 1340 #endif 1341 1342 /* Set I/O PDIR Page size to system page size */ 1343 switch (PAGE_SHIFT) { 1344 case 12: tcnfg = 0; break; /* 4K */ 1345 case 13: tcnfg = 1; break; /* 8K */ 1346 case 14: tcnfg = 2; break; /* 16K */ 1347 case 16: tcnfg = 3; break; /* 64K */ 1348 default: 1349 panic(__FILE__ "Unsupported system page size %d", 1350 1 << PAGE_SHIFT); 1351 break; 1352 } 1353 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG); 1354 1355 /* 1356 ** Program the IOC's ibase and enable IOVA translation 1357 ** Bit zero == enable bit. 1358 */ 1359 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE); 1360 1361 /* 1362 ** Clear I/O TLB of any possible entries. 1363 ** (Yes. This is a bit paranoid...but so what) 1364 */ 1365 WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM); 1366 1367 #ifdef SBA_AGP_SUPPORT 1368 1369 /* 1370 ** If an AGP device is present, only use half of the IOV space 1371 ** for PCI DMA. Unfortunately we can't know ahead of time 1372 ** whether GART support will actually be used, for now we 1373 ** can just key on any AGP device found in the system. 1374 ** We program the next pdir index after we stop w/ a key for 1375 ** the GART code to handshake on. 1376 */ 1377 device_for_each_child(&sba->dev, &agp_found, sba_ioc_find_quicksilver); 1378 1379 if (agp_found && sba_reserve_agpgart) { 1380 printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n", 1381 __func__, (iova_space_size/2) >> 20); 1382 ioc->pdir_size /= 2; 1383 ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE; 1384 } 1385 #endif /*SBA_AGP_SUPPORT*/ 1386 } 1387 1388 static void 1389 sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1390 { 1391 u32 iova_space_size, iova_space_mask; 1392 unsigned int pdir_size, iov_order, tcnfg; 1393 1394 /* 1395 ** Determine IOVA Space size from memory size. 1396 ** 1397 ** Ideally, PCI drivers would register the maximum number 1398 ** of DMA they can have outstanding for each device they 1399 ** own. Next best thing would be to guess how much DMA 1400 ** can be outstanding based on PCI Class/sub-class. Both 1401 ** methods still require some "extra" to support PCI 1402 ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). 1403 ** 1404 ** While we have 32-bits "IOVA" space, top two 2 bits are used 1405 ** for DMA hints - ergo only 30 bits max. 1406 */ 1407 1408 iova_space_size = (u32) (totalram_pages()/global_ioc_cnt); 1409 1410 /* limit IOVA space size to 1MB-1GB */ 1411 if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { 1412 iova_space_size = 1 << (20 - PAGE_SHIFT); 1413 } 1414 else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) { 1415 iova_space_size = 1 << (30 - PAGE_SHIFT); 1416 } 1417 1418 /* 1419 ** iova space must be log2() in size. 1420 ** thus, pdir/res_map will also be log2(). 1421 ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced) 1422 */ 1423 iov_order = get_order(iova_space_size << PAGE_SHIFT); 1424 1425 /* iova_space_size is now bytes, not pages */ 1426 iova_space_size = 1 << (iov_order + PAGE_SHIFT); 1427 1428 ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64); 1429 1430 DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n", 1431 __func__, 1432 ioc->ioc_hpa, 1433 (unsigned long) totalram_pages() >> (20 - PAGE_SHIFT), 1434 iova_space_size>>20, 1435 iov_order + PAGE_SHIFT); 1436 1437 ioc->pdir_base = sba_alloc_pdir(pdir_size); 1438 1439 DBG_INIT("%s() pdir %p size %x\n", 1440 __func__, ioc->pdir_base, pdir_size); 1441 1442 #ifdef SBA_HINT_SUPPORT 1443 /* FIXME : DMA HINTs not used */ 1444 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1445 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1446 1447 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1448 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1449 #endif 1450 1451 WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1452 1453 /* build IMASK for IOC and Elroy */ 1454 iova_space_mask = 0xffffffff; 1455 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1456 1457 /* 1458 ** On C3000 w/512MB mem, HP-UX 10.20 reports: 1459 ** ibase=0, imask=0xFE000000, size=0x2000000. 1460 */ 1461 ioc->ibase = 0; 1462 ioc->imask = iova_space_mask; /* save it */ 1463 #ifdef ZX1_SUPPORT 1464 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1465 #endif 1466 1467 DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n", 1468 __func__, ioc->ibase, ioc->imask); 1469 1470 /* 1471 ** FIXME: Hint registers are programmed with default hint 1472 ** values during boot, so hints should be sane even if we 1473 ** can't reprogram them the way drivers want. 1474 */ 1475 1476 setup_ibase_imask(sba, ioc, ioc_num); 1477 1478 /* 1479 ** Program the IOC's ibase and enable IOVA translation 1480 */ 1481 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE); 1482 WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK); 1483 1484 /* Set I/O PDIR Page size to system page size */ 1485 switch (PAGE_SHIFT) { 1486 case 12: tcnfg = 0; break; /* 4K */ 1487 case 13: tcnfg = 1; break; /* 8K */ 1488 case 14: tcnfg = 2; break; /* 16K */ 1489 case 16: tcnfg = 3; break; /* 64K */ 1490 default: 1491 panic(__FILE__ "Unsupported system page size %d", 1492 1 << PAGE_SHIFT); 1493 break; 1494 } 1495 /* Set I/O PDIR Page size to PAGE_SIZE (4k/16k/...) */ 1496 WRITE_REG(tcnfg, ioc->ioc_hpa+IOC_TCNFG); 1497 1498 /* 1499 ** Clear I/O TLB of any possible entries. 1500 ** (Yes. This is a bit paranoid...but so what) 1501 */ 1502 WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM); 1503 1504 ioc->ibase = 0; /* used by SBA_IOVA and related macros */ 1505 1506 DBG_INIT("%s() DONE\n", __func__); 1507 } 1508 1509 1510 1511 /************************************************************************** 1512 ** 1513 ** SBA initialization code (HW and SW) 1514 ** 1515 ** o identify SBA chip itself 1516 ** o initialize SBA chip modes (HardFail) 1517 ** o initialize SBA chip modes (HardFail) 1518 ** o FIXME: initialize DMA hints for reasonable defaults 1519 ** 1520 **************************************************************************/ 1521 1522 static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset) 1523 { 1524 return ioremap_nocache(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE); 1525 } 1526 1527 static void sba_hw_init(struct sba_device *sba_dev) 1528 { 1529 int i; 1530 int num_ioc; 1531 u64 ioc_ctl; 1532 1533 if (!is_pdc_pat()) { 1534 /* Shutdown the USB controller on Astro-based workstations. 1535 ** Once we reprogram the IOMMU, the next DMA performed by 1536 ** USB will HPMC the box. USB is only enabled if a 1537 ** keyboard is present and found. 1538 ** 1539 ** With serial console, j6k v5.0 firmware says: 1540 ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7 1541 ** 1542 ** FIXME: Using GFX+USB console at power up but direct 1543 ** linux to serial console is still broken. 1544 ** USB could generate DMA so we must reset USB. 1545 ** The proper sequence would be: 1546 ** o block console output 1547 ** o reset USB device 1548 ** o reprogram serial port 1549 ** o unblock console output 1550 */ 1551 if (PAGE0->mem_kbd.cl_class == CL_KEYBD) { 1552 pdc_io_reset_devices(); 1553 } 1554 1555 } 1556 1557 1558 #if 0 1559 printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa, 1560 PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class); 1561 1562 /* 1563 ** Need to deal with DMA from LAN. 1564 ** Maybe use page zero boot device as a handle to talk 1565 ** to PDC about which device to shutdown. 1566 ** 1567 ** Netbooting, j6k v5.0 firmware says: 1568 ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002 1569 ** ARGH! invalid class. 1570 */ 1571 if ((PAGE0->mem_boot.cl_class != CL_RANDOM) 1572 && (PAGE0->mem_boot.cl_class != CL_SEQU)) { 1573 pdc_io_reset(); 1574 } 1575 #endif 1576 1577 if (!IS_PLUTO(sba_dev->dev)) { 1578 ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL); 1579 DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->", 1580 __func__, sba_dev->sba_hpa, ioc_ctl); 1581 ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE); 1582 ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC; 1583 /* j6700 v1.6 firmware sets 0x294f */ 1584 /* A500 firmware sets 0x4d */ 1585 1586 WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL); 1587 1588 #ifdef DEBUG_SBA_INIT 1589 ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL); 1590 DBG_INIT(" 0x%Lx\n", ioc_ctl); 1591 #endif 1592 } /* if !PLUTO */ 1593 1594 if (IS_ASTRO(sba_dev->dev)) { 1595 int err; 1596 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET); 1597 num_ioc = 1; 1598 1599 sba_dev->chip_resv.name = "Astro Intr Ack"; 1600 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL; 1601 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ; 1602 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1603 BUG_ON(err < 0); 1604 1605 } else if (IS_PLUTO(sba_dev->dev)) { 1606 int err; 1607 1608 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET); 1609 num_ioc = 1; 1610 1611 sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA"; 1612 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL; 1613 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1); 1614 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1615 WARN_ON(err < 0); 1616 1617 sba_dev->iommu_resv.name = "IOVA Space"; 1618 sba_dev->iommu_resv.start = 0x40000000UL; 1619 sba_dev->iommu_resv.end = 0x50000000UL - 1; 1620 err = request_resource(&iomem_resource, &(sba_dev->iommu_resv)); 1621 WARN_ON(err < 0); 1622 } else { 1623 /* IKE, REO */ 1624 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0)); 1625 sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1)); 1626 num_ioc = 2; 1627 1628 /* TODO - LOOKUP Ike/Stretch chipset mem map */ 1629 } 1630 /* XXX: What about Reo Grande? */ 1631 1632 sba_dev->num_ioc = num_ioc; 1633 for (i = 0; i < num_ioc; i++) { 1634 void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa; 1635 unsigned int j; 1636 1637 for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) { 1638 1639 /* 1640 * Clear ROPE(N)_CONFIG AO bit. 1641 * Disables "NT Ordering" (~= !"Relaxed Ordering") 1642 * Overrides bit 1 in DMA Hint Sets. 1643 * Improves netperf UDP_STREAM by ~10% for bcm5701. 1644 */ 1645 if (IS_PLUTO(sba_dev->dev)) { 1646 void __iomem *rope_cfg; 1647 unsigned long cfg_val; 1648 1649 rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j; 1650 cfg_val = READ_REG(rope_cfg); 1651 cfg_val &= ~IOC_ROPE_AO; 1652 WRITE_REG(cfg_val, rope_cfg); 1653 } 1654 1655 /* 1656 ** Make sure the box crashes on rope errors. 1657 */ 1658 WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j); 1659 } 1660 1661 /* flush out the last writes */ 1662 READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); 1663 1664 DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n", 1665 i, 1666 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40), 1667 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50) 1668 ); 1669 DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n", 1670 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108), 1671 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400) 1672 ); 1673 1674 if (IS_PLUTO(sba_dev->dev)) { 1675 sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i); 1676 } else { 1677 sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i); 1678 } 1679 } 1680 } 1681 1682 static void 1683 sba_common_init(struct sba_device *sba_dev) 1684 { 1685 int i; 1686 1687 /* add this one to the head of the list (order doesn't matter) 1688 ** This will be useful for debugging - especially if we get coredumps 1689 */ 1690 sba_dev->next = sba_list; 1691 sba_list = sba_dev; 1692 1693 for(i=0; i< sba_dev->num_ioc; i++) { 1694 int res_size; 1695 #ifdef DEBUG_DMB_TRAP 1696 extern void iterate_pages(unsigned long , unsigned long , 1697 void (*)(pte_t * , unsigned long), 1698 unsigned long ); 1699 void set_data_memory_break(pte_t * , unsigned long); 1700 #endif 1701 /* resource map size dictated by pdir_size */ 1702 res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */ 1703 1704 /* Second part of PIRANHA BUG */ 1705 if (piranha_bad_128k) { 1706 res_size -= (128*1024)/sizeof(u64); 1707 } 1708 1709 res_size >>= 3; /* convert bit count to byte count */ 1710 DBG_INIT("%s() res_size 0x%x\n", 1711 __func__, res_size); 1712 1713 sba_dev->ioc[i].res_size = res_size; 1714 sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size)); 1715 1716 #ifdef DEBUG_DMB_TRAP 1717 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1718 set_data_memory_break, 0); 1719 #endif 1720 1721 if (NULL == sba_dev->ioc[i].res_map) 1722 { 1723 panic("%s:%s() could not allocate resource map\n", 1724 __FILE__, __func__ ); 1725 } 1726 1727 memset(sba_dev->ioc[i].res_map, 0, res_size); 1728 /* next available IOVP - circular search */ 1729 sba_dev->ioc[i].res_hint = (unsigned long *) 1730 &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]); 1731 1732 #ifdef ASSERT_PDIR_SANITY 1733 /* Mark first bit busy - ie no IOVA 0 */ 1734 sba_dev->ioc[i].res_map[0] = 0x80; 1735 sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL; 1736 #endif 1737 1738 /* Third (and last) part of PIRANHA BUG */ 1739 if (piranha_bad_128k) { 1740 /* region from +1408K to +1536 is un-usable. */ 1741 1742 int idx_start = (1408*1024/sizeof(u64)) >> 3; 1743 int idx_end = (1536*1024/sizeof(u64)) >> 3; 1744 long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]); 1745 long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]); 1746 1747 /* mark that part of the io pdir busy */ 1748 while (p_start < p_end) 1749 *p_start++ = -1; 1750 1751 } 1752 1753 #ifdef DEBUG_DMB_TRAP 1754 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1755 set_data_memory_break, 0); 1756 iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size, 1757 set_data_memory_break, 0); 1758 #endif 1759 1760 DBG_INIT("%s() %d res_map %x %p\n", 1761 __func__, i, res_size, sba_dev->ioc[i].res_map); 1762 } 1763 1764 spin_lock_init(&sba_dev->sba_lock); 1765 ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC; 1766 1767 #ifdef DEBUG_SBA_INIT 1768 /* 1769 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 1770 * (bit #61, big endian), we have to flush and sync every time 1771 * IO-PDIR is changed in Ike/Astro. 1772 */ 1773 if (ioc_needs_fdc) { 1774 printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n"); 1775 } else { 1776 printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n"); 1777 } 1778 #endif 1779 } 1780 1781 #ifdef CONFIG_PROC_FS 1782 static int sba_proc_info(struct seq_file *m, void *p) 1783 { 1784 struct sba_device *sba_dev = sba_list; 1785 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1786 int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */ 1787 #ifdef SBA_COLLECT_STATS 1788 unsigned long avg = 0, min, max; 1789 #endif 1790 int i; 1791 1792 seq_printf(m, "%s rev %d.%d\n", 1793 sba_dev->name, 1794 (sba_dev->hw_rev & 0x7) + 1, 1795 (sba_dev->hw_rev & 0x18) >> 3); 1796 seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", 1797 (int)((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */ 1798 total_pages); 1799 1800 seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", 1801 ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */ 1802 1803 seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n", 1804 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE), 1805 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK), 1806 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)); 1807 1808 for (i=0; i<4; i++) 1809 seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", 1810 i, 1811 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18), 1812 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18), 1813 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)); 1814 1815 #ifdef SBA_COLLECT_STATS 1816 seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", 1817 total_pages - ioc->used_pages, ioc->used_pages, 1818 (int)(ioc->used_pages * 100 / total_pages)); 1819 1820 min = max = ioc->avg_search[0]; 1821 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) { 1822 avg += ioc->avg_search[i]; 1823 if (ioc->avg_search[i] > max) max = ioc->avg_search[i]; 1824 if (ioc->avg_search[i] < min) min = ioc->avg_search[i]; 1825 } 1826 avg /= SBA_SEARCH_SAMPLE; 1827 seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", 1828 min, avg, max); 1829 1830 seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n", 1831 ioc->msingle_calls, ioc->msingle_pages, 1832 (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls)); 1833 1834 /* KLUGE - unmap_sg calls unmap_single for each mapped page */ 1835 min = ioc->usingle_calls; 1836 max = ioc->usingle_pages - ioc->usg_pages; 1837 seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n", 1838 min, max, (int)((max * 1000)/min)); 1839 1840 seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1841 ioc->msg_calls, ioc->msg_pages, 1842 (int)((ioc->msg_pages * 1000)/ioc->msg_calls)); 1843 1844 seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1845 ioc->usg_calls, ioc->usg_pages, 1846 (int)((ioc->usg_pages * 1000)/ioc->usg_calls)); 1847 #endif 1848 1849 return 0; 1850 } 1851 1852 static int 1853 sba_proc_bitmap_info(struct seq_file *m, void *p) 1854 { 1855 struct sba_device *sba_dev = sba_list; 1856 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1857 1858 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, ioc->res_map, 1859 ioc->res_size, false); 1860 seq_putc(m, '\n'); 1861 1862 return 0; 1863 } 1864 #endif /* CONFIG_PROC_FS */ 1865 1866 static const struct parisc_device_id sba_tbl[] __initconst = { 1867 { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb }, 1868 { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc }, 1869 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc }, 1870 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc }, 1871 { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc }, 1872 { 0, } 1873 }; 1874 1875 static int sba_driver_callback(struct parisc_device *); 1876 1877 static struct parisc_driver sba_driver __refdata = { 1878 .name = MODULE_NAME, 1879 .id_table = sba_tbl, 1880 .probe = sba_driver_callback, 1881 }; 1882 1883 /* 1884 ** Determine if sba should claim this chip (return 0) or not (return 1). 1885 ** If so, initialize the chip and tell other partners in crime they 1886 ** have work to do. 1887 */ 1888 static int __init sba_driver_callback(struct parisc_device *dev) 1889 { 1890 struct sba_device *sba_dev; 1891 u32 func_class; 1892 int i; 1893 char *version; 1894 void __iomem *sba_addr = ioremap_nocache(dev->hpa.start, SBA_FUNC_SIZE); 1895 #ifdef CONFIG_PROC_FS 1896 struct proc_dir_entry *root; 1897 #endif 1898 1899 sba_dump_ranges(sba_addr); 1900 1901 /* Read HW Rev First */ 1902 func_class = READ_REG(sba_addr + SBA_FCLASS); 1903 1904 if (IS_ASTRO(dev)) { 1905 unsigned long fclass; 1906 static char astro_rev[]="Astro ?.?"; 1907 1908 /* Astro is broken...Read HW Rev First */ 1909 fclass = READ_REG(sba_addr); 1910 1911 astro_rev[6] = '1' + (char) (fclass & 0x7); 1912 astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3); 1913 version = astro_rev; 1914 1915 } else if (IS_IKE(dev)) { 1916 static char ike_rev[] = "Ike rev ?"; 1917 ike_rev[8] = '0' + (char) (func_class & 0xff); 1918 version = ike_rev; 1919 } else if (IS_PLUTO(dev)) { 1920 static char pluto_rev[]="Pluto ?.?"; 1921 pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4); 1922 pluto_rev[8] = '0' + (char) (func_class & 0x0f); 1923 version = pluto_rev; 1924 } else { 1925 static char reo_rev[] = "REO rev ?"; 1926 reo_rev[8] = '0' + (char) (func_class & 0xff); 1927 version = reo_rev; 1928 } 1929 1930 if (!global_ioc_cnt) { 1931 global_ioc_cnt = count_parisc_driver(&sba_driver); 1932 1933 /* Astro and Pluto have one IOC per SBA */ 1934 if ((!IS_ASTRO(dev)) || (!IS_PLUTO(dev))) 1935 global_ioc_cnt *= 2; 1936 } 1937 1938 printk(KERN_INFO "%s found %s at 0x%llx\n", 1939 MODULE_NAME, version, (unsigned long long)dev->hpa.start); 1940 1941 sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL); 1942 if (!sba_dev) { 1943 printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n"); 1944 return -ENOMEM; 1945 } 1946 1947 parisc_set_drvdata(dev, sba_dev); 1948 1949 for(i=0; i<MAX_IOC; i++) 1950 spin_lock_init(&(sba_dev->ioc[i].res_lock)); 1951 1952 sba_dev->dev = dev; 1953 sba_dev->hw_rev = func_class; 1954 sba_dev->name = dev->name; 1955 sba_dev->sba_hpa = sba_addr; 1956 1957 sba_get_pat_resources(sba_dev); 1958 sba_hw_init(sba_dev); 1959 sba_common_init(sba_dev); 1960 1961 hppa_dma_ops = &sba_ops; 1962 1963 #ifdef CONFIG_PROC_FS 1964 switch (dev->id.hversion) { 1965 case PLUTO_MCKINLEY_PORT: 1966 root = proc_mckinley_root; 1967 break; 1968 case ASTRO_RUNWAY_PORT: 1969 case IKE_MERCED_PORT: 1970 default: 1971 root = proc_runway_root; 1972 break; 1973 } 1974 1975 proc_create_single("sba_iommu", 0, root, sba_proc_info); 1976 proc_create_single("sba_iommu-bitmap", 0, root, sba_proc_bitmap_info); 1977 #endif 1978 return 0; 1979 } 1980 1981 /* 1982 ** One time initialization to let the world know the SBA was found. 1983 ** This is the only routine which is NOT static. 1984 ** Must be called exactly once before pci_init(). 1985 */ 1986 void __init sba_init(void) 1987 { 1988 register_parisc_driver(&sba_driver); 1989 } 1990 1991 1992 /** 1993 * sba_get_iommu - Assign the iommu pointer for the pci bus controller. 1994 * @dev: The parisc device. 1995 * 1996 * Returns the appropriate IOMMU data for the given parisc PCI controller. 1997 * This is cached and used later for PCI DMA Mapping. 1998 */ 1999 void * sba_get_iommu(struct parisc_device *pci_hba) 2000 { 2001 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2002 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2003 char t = sba_dev->id.hw_type; 2004 int iocnum = (pci_hba->hw_path >> 3); /* rope # */ 2005 2006 WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT)); 2007 2008 return &(sba->ioc[iocnum]); 2009 } 2010 2011 2012 /** 2013 * sba_directed_lmmio - return first directed LMMIO range routed to rope 2014 * @pa_dev: The parisc device. 2015 * @r: resource PCI host controller wants start/end fields assigned. 2016 * 2017 * For the given parisc PCI controller, determine if any direct ranges 2018 * are routed down the corresponding rope. 2019 */ 2020 void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r) 2021 { 2022 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2023 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2024 char t = sba_dev->id.hw_type; 2025 int i; 2026 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2027 2028 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2029 2030 r->start = r->end = 0; 2031 2032 /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */ 2033 for (i=0; i<4; i++) { 2034 int base, size; 2035 void __iomem *reg = sba->sba_hpa + i*0x18; 2036 2037 base = READ_REG32(reg + LMMIO_DIRECT0_BASE); 2038 if ((base & 1) == 0) 2039 continue; /* not enabled */ 2040 2041 size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE); 2042 2043 if ((size & (ROPES_PER_IOC-1)) != rope) 2044 continue; /* directed down different rope */ 2045 2046 r->start = (base & ~1UL) | PCI_F_EXTEND; 2047 size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK); 2048 r->end = r->start + size; 2049 r->flags = IORESOURCE_MEM; 2050 } 2051 } 2052 2053 2054 /** 2055 * sba_distributed_lmmio - return portion of distributed LMMIO range 2056 * @pa_dev: The parisc device. 2057 * @r: resource PCI host controller wants start/end fields assigned. 2058 * 2059 * For the given parisc PCI controller, return portion of distributed LMMIO 2060 * range. The distributed LMMIO is always present and it's just a question 2061 * of the base address and size of the range. 2062 */ 2063 void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r ) 2064 { 2065 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2066 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2067 char t = sba_dev->id.hw_type; 2068 int base, size; 2069 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2070 2071 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2072 2073 r->start = r->end = 0; 2074 2075 base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE); 2076 if ((base & 1) == 0) { 2077 BUG(); /* Gah! Distr Range wasn't enabled! */ 2078 return; 2079 } 2080 2081 r->start = (base & ~1UL) | PCI_F_EXTEND; 2082 2083 size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC; 2084 r->start += rope * (size + 1); /* adjust base for this rope */ 2085 r->end = r->start + size; 2086 r->flags = IORESOURCE_MEM; 2087 } 2088