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/dma-map-ops.h> 29 #include <linux/scatterlist.h> 30 #include <linux/iommu-helper.h> 31 /* 32 * The semantics of 64 register access on 32bit systems can't be guaranteed 33 * by the C standard, we hope the _lo_hi() macros defining readq and writeq 34 * here will behave as expected. 35 */ 36 #include <linux/io-64-nonatomic-lo-hi.h> 37 38 #include <asm/byteorder.h> 39 #include <asm/io.h> 40 #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ 41 42 #include <asm/hardware.h> /* for register_parisc_driver() stuff */ 43 44 #include <linux/proc_fs.h> 45 #include <linux/seq_file.h> 46 #include <linux/module.h> 47 48 #include <asm/ropes.h> 49 #include <asm/mckinley.h> /* for proc_mckinley_root */ 50 #include <asm/runway.h> /* for proc_runway_root */ 51 #include <asm/page.h> /* for PAGE0 */ 52 #include <asm/pdc.h> /* for PDC_MODEL_* */ 53 #include <asm/pdcpat.h> /* for is_pdc_pat() */ 54 #include <asm/parisc-device.h> 55 56 #include "iommu.h" 57 58 #define MODULE_NAME "SBA" 59 60 /* 61 ** The number of debug flags is a clue - this code is fragile. 62 ** Don't even think about messing with it unless you have 63 ** plenty of 710's to sacrifice to the computer gods. :^) 64 */ 65 #undef DEBUG_SBA_INIT 66 #undef DEBUG_SBA_RUN 67 #undef DEBUG_SBA_RUN_SG 68 #undef DEBUG_SBA_RESOURCE 69 #undef ASSERT_PDIR_SANITY 70 #undef DEBUG_LARGE_SG_ENTRIES 71 #undef DEBUG_DMB_TRAP 72 73 #ifdef DEBUG_SBA_INIT 74 #define DBG_INIT(x...) printk(x) 75 #else 76 #define DBG_INIT(x...) 77 #endif 78 79 #ifdef DEBUG_SBA_RUN 80 #define DBG_RUN(x...) printk(x) 81 #else 82 #define DBG_RUN(x...) 83 #endif 84 85 #ifdef DEBUG_SBA_RUN_SG 86 #define DBG_RUN_SG(x...) printk(x) 87 #else 88 #define DBG_RUN_SG(x...) 89 #endif 90 91 92 #ifdef DEBUG_SBA_RESOURCE 93 #define DBG_RES(x...) printk(x) 94 #else 95 #define DBG_RES(x...) 96 #endif 97 98 #define SBA_INLINE __inline__ 99 100 #define DEFAULT_DMA_HINT_REG 0 101 102 struct sba_device *sba_list; 103 EXPORT_SYMBOL_GPL(sba_list); 104 105 static unsigned long ioc_needs_fdc = 0; 106 107 /* global count of IOMMUs in the system */ 108 static unsigned int global_ioc_cnt = 0; 109 110 /* PA8700 (Piranha 2.2) bug workaround */ 111 static unsigned long piranha_bad_128k = 0; 112 113 /* Looks nice and keeps the compiler happy */ 114 #define SBA_DEV(d) ((struct sba_device *) (d)) 115 116 #ifdef CONFIG_AGP_PARISC 117 #define SBA_AGP_SUPPORT 118 #endif /*CONFIG_AGP_PARISC*/ 119 120 #ifdef SBA_AGP_SUPPORT 121 static int sba_reserve_agpgart = 1; 122 module_param(sba_reserve_agpgart, int, 0444); 123 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART"); 124 #endif 125 126 127 /************************************ 128 ** SBA register read and write support 129 ** 130 ** BE WARNED: register writes are posted. 131 ** (ie follow writes which must reach HW with a read) 132 ** 133 ** Superdome (in particular, REO) allows only 64-bit CSR accesses. 134 */ 135 #define READ_REG32(addr) readl(addr) 136 #define READ_REG64(addr) readq(addr) 137 #define WRITE_REG32(val, addr) writel((val), (addr)) 138 #define WRITE_REG64(val, addr) writeq((val), (addr)) 139 140 #ifdef CONFIG_64BIT 141 #define READ_REG(addr) READ_REG64(addr) 142 #define WRITE_REG(value, addr) WRITE_REG64(value, addr) 143 #else 144 #define READ_REG(addr) READ_REG32(addr) 145 #define WRITE_REG(value, addr) WRITE_REG32(value, addr) 146 #endif 147 148 #ifdef DEBUG_SBA_INIT 149 150 /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */ 151 152 /** 153 * sba_dump_ranges - debugging only - print ranges assigned to this IOA 154 * @hpa: base address of the sba 155 * 156 * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO 157 * IO Adapter (aka Bus Converter). 158 */ 159 static void 160 sba_dump_ranges(void __iomem *hpa) 161 { 162 DBG_INIT("SBA at 0x%p\n", hpa); 163 DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE)); 164 DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK)); 165 DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE)); 166 DBG_INIT("\n"); 167 DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE)); 168 DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK)); 169 DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE)); 170 } 171 172 /** 173 * sba_dump_tlb - debugging only - print IOMMU operating parameters 174 * @hpa: base address of the IOMMU 175 * 176 * Print the size/location of the IO MMU PDIR. 177 */ 178 static void sba_dump_tlb(void __iomem *hpa) 179 { 180 DBG_INIT("IO TLB at 0x%p\n", hpa); 181 DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE)); 182 DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK)); 183 DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG)); 184 DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE)); 185 DBG_INIT("\n"); 186 } 187 #else 188 #define sba_dump_ranges(x) 189 #define sba_dump_tlb(x) 190 #endif /* DEBUG_SBA_INIT */ 191 192 193 #ifdef ASSERT_PDIR_SANITY 194 195 /** 196 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry 197 * @ioc: IO MMU structure which owns the pdir we are interested in. 198 * @msg: text to print ont the output line. 199 * @pide: pdir index. 200 * 201 * Print one entry of the IO MMU PDIR in human readable form. 202 */ 203 static void 204 sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide) 205 { 206 /* start printing from lowest pde in rval */ 207 u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]); 208 unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]); 209 uint rcnt; 210 211 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n", 212 msg, 213 rptr, pide & (BITS_PER_LONG - 1), *rptr); 214 215 rcnt = 0; 216 while (rcnt < BITS_PER_LONG) { 217 printk(KERN_DEBUG "%s %2d %p %016Lx\n", 218 (rcnt == (pide & (BITS_PER_LONG - 1))) 219 ? " -->" : " ", 220 rcnt, ptr, *ptr ); 221 rcnt++; 222 ptr++; 223 } 224 printk(KERN_DEBUG "%s", msg); 225 } 226 227 228 /** 229 * sba_check_pdir - debugging only - consistency checker 230 * @ioc: IO MMU structure which owns the pdir we are interested in. 231 * @msg: text to print ont the output line. 232 * 233 * Verify the resource map and pdir state is consistent 234 */ 235 static int 236 sba_check_pdir(struct ioc *ioc, char *msg) 237 { 238 u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]); 239 u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */ 240 u64 *pptr = ioc->pdir_base; /* pdir ptr */ 241 uint pide = 0; 242 243 while (rptr < rptr_end) { 244 u32 rval = *rptr; 245 int rcnt = 32; /* number of bits we might check */ 246 247 while (rcnt) { 248 /* Get last byte and highest bit from that */ 249 u32 pde = ((u32) (((char *)pptr)[7])) << 24; 250 if ((rval ^ pde) & 0x80000000) 251 { 252 /* 253 ** BUMMER! -- res_map != pdir -- 254 ** Dump rval and matching pdir entries 255 */ 256 sba_dump_pdir_entry(ioc, msg, pide); 257 return(1); 258 } 259 rcnt--; 260 rval <<= 1; /* try the next bit */ 261 pptr++; 262 pide++; 263 } 264 rptr++; /* look at next word of res_map */ 265 } 266 /* It'd be nice if we always got here :^) */ 267 return 0; 268 } 269 270 271 /** 272 * sba_dump_sg - debugging only - print Scatter-Gather list 273 * @ioc: IO MMU structure which owns the pdir we are interested in. 274 * @startsg: head of the SG list 275 * @nents: number of entries in SG list 276 * 277 * print the SG list so we can verify it's correct by hand. 278 */ 279 static void 280 sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents) 281 { 282 while (nents-- > 0) { 283 printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n", 284 nents, 285 (unsigned long) sg_dma_address(startsg), 286 sg_dma_len(startsg), 287 sg_virt(startsg), startsg->length); 288 startsg++; 289 } 290 } 291 292 #endif /* ASSERT_PDIR_SANITY */ 293 294 295 296 297 /************************************************************** 298 * 299 * I/O Pdir Resource Management 300 * 301 * Bits set in the resource map are in use. 302 * Each bit can represent a number of pages. 303 * LSbs represent lower addresses (IOVA's). 304 * 305 ***************************************************************/ 306 #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */ 307 308 /* Convert from IOVP to IOVA and vice versa. */ 309 310 #ifdef ZX1_SUPPORT 311 /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */ 312 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset)) 313 #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask) 314 #else 315 /* only support Astro and ancestors. Saves a few cycles in key places */ 316 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset)) 317 #define SBA_IOVP(ioc,iova) (iova) 318 #endif 319 320 #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT) 321 322 #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n))) 323 #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1) 324 325 static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr, 326 unsigned int bitshiftcnt) 327 { 328 return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3) 329 + bitshiftcnt; 330 } 331 332 /** 333 * sba_search_bitmap - find free space in IO PDIR resource bitmap 334 * @ioc: IO MMU structure which owns the pdir we are interested in. 335 * @bits_wanted: number of entries we need. 336 * 337 * Find consecutive free bits in resource bitmap. 338 * Each bit represents one entry in the IO Pdir. 339 * Cool perf optimization: search for log2(size) bits at a time. 340 */ 341 static SBA_INLINE unsigned long 342 sba_search_bitmap(struct ioc *ioc, struct device *dev, 343 unsigned long bits_wanted) 344 { 345 unsigned long *res_ptr = ioc->res_hint; 346 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]); 347 unsigned long pide = ~0UL, tpide; 348 unsigned long boundary_size; 349 unsigned long shift; 350 int ret; 351 352 boundary_size = dma_get_seg_boundary_nr_pages(dev, IOVP_SHIFT); 353 354 #if defined(ZX1_SUPPORT) 355 BUG_ON(ioc->ibase & ~IOVP_MASK); 356 shift = ioc->ibase >> IOVP_SHIFT; 357 #else 358 shift = 0; 359 #endif 360 361 if (bits_wanted > (BITS_PER_LONG/2)) { 362 /* Search word at a time - no mask needed */ 363 for(; res_ptr < res_end; ++res_ptr) { 364 tpide = ptr_to_pide(ioc, res_ptr, 0); 365 ret = iommu_is_span_boundary(tpide, bits_wanted, 366 shift, 367 boundary_size); 368 if ((*res_ptr == 0) && !ret) { 369 *res_ptr = RESMAP_MASK(bits_wanted); 370 pide = tpide; 371 break; 372 } 373 } 374 /* point to the next word on next pass */ 375 res_ptr++; 376 ioc->res_bitshift = 0; 377 } else { 378 /* 379 ** Search the resource bit map on well-aligned values. 380 ** "o" is the alignment. 381 ** We need the alignment to invalidate I/O TLB using 382 ** SBA HW features in the unmap path. 383 */ 384 unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT); 385 uint bitshiftcnt = ALIGN(ioc->res_bitshift, o); 386 unsigned long mask; 387 388 if (bitshiftcnt >= BITS_PER_LONG) { 389 bitshiftcnt = 0; 390 res_ptr++; 391 } 392 mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt; 393 394 DBG_RES("%s() o %ld %p", __func__, o, res_ptr); 395 while(res_ptr < res_end) 396 { 397 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr); 398 WARN_ON(mask == 0); 399 tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt); 400 ret = iommu_is_span_boundary(tpide, bits_wanted, 401 shift, 402 boundary_size); 403 if ((((*res_ptr) & mask) == 0) && !ret) { 404 *res_ptr |= mask; /* mark resources busy! */ 405 pide = tpide; 406 break; 407 } 408 mask >>= o; 409 bitshiftcnt += o; 410 if (mask == 0) { 411 mask = RESMAP_MASK(bits_wanted); 412 bitshiftcnt=0; 413 res_ptr++; 414 } 415 } 416 /* look in the same word on the next pass */ 417 ioc->res_bitshift = bitshiftcnt + bits_wanted; 418 } 419 420 /* wrapped ? */ 421 if (res_end <= res_ptr) { 422 ioc->res_hint = (unsigned long *) ioc->res_map; 423 ioc->res_bitshift = 0; 424 } else { 425 ioc->res_hint = res_ptr; 426 } 427 return (pide); 428 } 429 430 431 /** 432 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap 433 * @ioc: IO MMU structure which owns the pdir we are interested in. 434 * @size: number of bytes to create a mapping for 435 * 436 * Given a size, find consecutive unmarked and then mark those bits in the 437 * resource bit map. 438 */ 439 static int 440 sba_alloc_range(struct ioc *ioc, struct device *dev, size_t size) 441 { 442 unsigned int pages_needed = size >> IOVP_SHIFT; 443 #ifdef SBA_COLLECT_STATS 444 unsigned long cr_start = mfctl(16); 445 #endif 446 unsigned long pide; 447 448 pide = sba_search_bitmap(ioc, dev, pages_needed); 449 if (pide >= (ioc->res_size << 3)) { 450 pide = sba_search_bitmap(ioc, dev, pages_needed); 451 if (pide >= (ioc->res_size << 3)) 452 panic("%s: I/O MMU @ %p is out of mapping resources\n", 453 __FILE__, ioc->ioc_hpa); 454 } 455 456 #ifdef ASSERT_PDIR_SANITY 457 /* verify the first enable bit is clear */ 458 if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) { 459 sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide); 460 } 461 #endif 462 463 DBG_RES("%s(%x) %d -> %lx hint %x/%x\n", 464 __func__, size, pages_needed, pide, 465 (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map), 466 ioc->res_bitshift ); 467 468 #ifdef SBA_COLLECT_STATS 469 { 470 unsigned long cr_end = mfctl(16); 471 unsigned long tmp = cr_end - cr_start; 472 /* check for roll over */ 473 cr_start = (cr_end < cr_start) ? -(tmp) : (tmp); 474 } 475 ioc->avg_search[ioc->avg_idx++] = cr_start; 476 ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1; 477 478 ioc->used_pages += pages_needed; 479 #endif 480 481 return (pide); 482 } 483 484 485 /** 486 * sba_free_range - unmark bits in IO PDIR resource bitmap 487 * @ioc: IO MMU structure which owns the pdir we are interested in. 488 * @iova: IO virtual address which was previously allocated. 489 * @size: number of bytes to create a mapping for 490 * 491 * clear bits in the ioc's resource map 492 */ 493 static SBA_INLINE void 494 sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size) 495 { 496 unsigned long iovp = SBA_IOVP(ioc, iova); 497 unsigned int pide = PDIR_INDEX(iovp); 498 unsigned int ridx = pide >> 3; /* convert bit to byte address */ 499 unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]); 500 501 int bits_not_wanted = size >> IOVP_SHIFT; 502 503 /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */ 504 unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1)); 505 506 DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n", 507 __func__, (uint) iova, size, 508 bits_not_wanted, m, pide, res_ptr, *res_ptr); 509 510 #ifdef SBA_COLLECT_STATS 511 ioc->used_pages -= bits_not_wanted; 512 #endif 513 514 *res_ptr &= ~m; 515 } 516 517 518 /************************************************************** 519 * 520 * "Dynamic DMA Mapping" support (aka "Coherent I/O") 521 * 522 ***************************************************************/ 523 524 #ifdef SBA_HINT_SUPPORT 525 #define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir) 526 #endif 527 528 typedef unsigned long space_t; 529 #define KERNEL_SPACE 0 530 531 /** 532 * sba_io_pdir_entry - fill in one IO PDIR entry 533 * @pdir_ptr: pointer to IO PDIR entry 534 * @sid: process Space ID - currently only support KERNEL_SPACE 535 * @vba: Virtual CPU address of buffer to map 536 * @hint: DMA hint set to use for this mapping 537 * 538 * SBA Mapping Routine 539 * 540 * Given a virtual address (vba, arg2) and space id, (sid, arg1) 541 * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by 542 * pdir_ptr (arg0). 543 * Using the bass-ackwards HP bit numbering, Each IO Pdir entry 544 * for Astro/Ike looks like: 545 * 546 * 547 * 0 19 51 55 63 548 * +-+---------------------+----------------------------------+----+--------+ 549 * |V| U | PPN[43:12] | U | VI | 550 * +-+---------------------+----------------------------------+----+--------+ 551 * 552 * Pluto is basically identical, supports fewer physical address bits: 553 * 554 * 0 23 51 55 63 555 * +-+------------------------+-------------------------------+----+--------+ 556 * |V| U | PPN[39:12] | U | VI | 557 * +-+------------------------+-------------------------------+----+--------+ 558 * 559 * V == Valid Bit (Most Significant Bit is bit 0) 560 * U == Unused 561 * PPN == Physical Page Number 562 * VI == Virtual Index (aka Coherent Index) 563 * 564 * LPA instruction output is put into PPN field. 565 * LCI (Load Coherence Index) instruction provides the "VI" bits. 566 * 567 * We pre-swap the bytes since PCX-W is Big Endian and the 568 * IOMMU uses little endian for the pdir. 569 */ 570 571 static void SBA_INLINE 572 sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba, 573 unsigned long hint) 574 { 575 u64 pa; /* physical address */ 576 register unsigned ci; /* coherent index */ 577 578 pa = lpa(vba); 579 pa &= IOVP_MASK; 580 581 asm("lci 0(%1), %0" : "=r" (ci) : "r" (vba)); 582 pa |= (ci >> PAGE_SHIFT) & 0xff; /* move CI (8 bits) into lowest byte */ 583 584 pa |= SBA_PDIR_VALID_BIT; /* set "valid" bit */ 585 *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */ 586 587 /* 588 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 589 * (bit #61, big endian), we have to flush and sync every time 590 * IO-PDIR is changed in Ike/Astro. 591 */ 592 asm_io_fdc(pdir_ptr); 593 } 594 595 596 /** 597 * sba_mark_invalid - invalidate one or more IO PDIR entries 598 * @ioc: IO MMU structure which owns the pdir we are interested in. 599 * @iova: IO Virtual Address mapped earlier 600 * @byte_cnt: number of bytes this mapping covers. 601 * 602 * Marking the IO PDIR entry(ies) as Invalid and invalidate 603 * corresponding IO TLB entry. The Ike PCOM (Purge Command Register) 604 * is to purge stale entries in the IO TLB when unmapping entries. 605 * 606 * The PCOM register supports purging of multiple pages, with a minium 607 * of 1 page and a maximum of 2GB. Hardware requires the address be 608 * aligned to the size of the range being purged. The size of the range 609 * must be a power of 2. The "Cool perf optimization" in the 610 * allocation routine helps keep that true. 611 */ 612 static SBA_INLINE void 613 sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt) 614 { 615 u32 iovp = (u32) SBA_IOVP(ioc,iova); 616 u64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)]; 617 618 #ifdef ASSERT_PDIR_SANITY 619 /* Assert first pdir entry is set. 620 ** 621 ** Even though this is a big-endian machine, the entries 622 ** in the iopdir are little endian. That's why we look at 623 ** the byte at +7 instead of at +0. 624 */ 625 if (0x80 != (((u8 *) pdir_ptr)[7])) { 626 sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp)); 627 } 628 #endif 629 630 if (byte_cnt > IOVP_SIZE) 631 { 632 #if 0 633 unsigned long entries_per_cacheline = ioc_needs_fdc ? 634 L1_CACHE_ALIGN(((unsigned long) pdir_ptr)) 635 - (unsigned long) pdir_ptr; 636 : 262144; 637 #endif 638 639 /* set "size" field for PCOM */ 640 iovp |= get_order(byte_cnt) + PAGE_SHIFT; 641 642 do { 643 /* clear I/O Pdir entry "valid" bit first */ 644 ((u8 *) pdir_ptr)[7] = 0; 645 asm_io_fdc(pdir_ptr); 646 if (ioc_needs_fdc) { 647 #if 0 648 entries_per_cacheline = L1_CACHE_SHIFT - 3; 649 #endif 650 } 651 pdir_ptr++; 652 byte_cnt -= IOVP_SIZE; 653 } while (byte_cnt > IOVP_SIZE); 654 } else 655 iovp |= IOVP_SHIFT; /* set "size" field for PCOM */ 656 657 /* 658 ** clear I/O PDIR entry "valid" bit. 659 ** We have to R/M/W the cacheline regardless how much of the 660 ** pdir entry that we clobber. 661 ** The rest of the entry would be useful for debugging if we 662 ** could dump core on HPMC. 663 */ 664 ((u8 *) pdir_ptr)[7] = 0; 665 asm_io_fdc(pdir_ptr); 666 667 WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM); 668 } 669 670 /** 671 * sba_dma_supported - PCI driver can query DMA support 672 * @dev: instance of PCI owned by the driver that's asking 673 * @mask: number of address bits this PCI device can handle 674 * 675 * See Documentation/core-api/dma-api-howto.rst 676 */ 677 static int sba_dma_supported( struct device *dev, u64 mask) 678 { 679 struct ioc *ioc; 680 681 if (dev == NULL) { 682 printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n"); 683 BUG(); 684 return(0); 685 } 686 687 ioc = GET_IOC(dev); 688 if (!ioc) 689 return 0; 690 691 /* 692 * check if mask is >= than the current max IO Virt Address 693 * The max IO Virt address will *always* < 30 bits. 694 */ 695 return((int)(mask >= (ioc->ibase - 1 + 696 (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) ))); 697 } 698 699 700 /** 701 * sba_map_single - map one buffer and return IOVA for DMA 702 * @dev: instance of PCI owned by the driver that's asking. 703 * @addr: driver buffer to map. 704 * @size: number of bytes to map in driver buffer. 705 * @direction: R/W or both. 706 * 707 * See Documentation/core-api/dma-api-howto.rst 708 */ 709 static dma_addr_t 710 sba_map_single(struct device *dev, void *addr, size_t size, 711 enum dma_data_direction direction) 712 { 713 struct ioc *ioc; 714 unsigned long flags; 715 dma_addr_t iovp; 716 dma_addr_t offset; 717 u64 *pdir_start; 718 int pide; 719 720 ioc = GET_IOC(dev); 721 if (!ioc) 722 return DMA_MAPPING_ERROR; 723 724 /* save offset bits */ 725 offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK; 726 727 /* round up to nearest IOVP_SIZE */ 728 size = (size + offset + ~IOVP_MASK) & IOVP_MASK; 729 730 spin_lock_irqsave(&ioc->res_lock, flags); 731 #ifdef ASSERT_PDIR_SANITY 732 sba_check_pdir(ioc,"Check before sba_map_single()"); 733 #endif 734 735 #ifdef SBA_COLLECT_STATS 736 ioc->msingle_calls++; 737 ioc->msingle_pages += size >> IOVP_SHIFT; 738 #endif 739 pide = sba_alloc_range(ioc, dev, size); 740 iovp = (dma_addr_t) pide << IOVP_SHIFT; 741 742 DBG_RUN("%s() 0x%p -> 0x%lx\n", 743 __func__, addr, (long) iovp | offset); 744 745 pdir_start = &(ioc->pdir_base[pide]); 746 747 while (size > 0) { 748 sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0); 749 750 DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n", 751 pdir_start, 752 (u8) (((u8 *) pdir_start)[7]), 753 (u8) (((u8 *) pdir_start)[6]), 754 (u8) (((u8 *) pdir_start)[5]), 755 (u8) (((u8 *) pdir_start)[4]), 756 (u8) (((u8 *) pdir_start)[3]), 757 (u8) (((u8 *) pdir_start)[2]), 758 (u8) (((u8 *) pdir_start)[1]), 759 (u8) (((u8 *) pdir_start)[0]) 760 ); 761 762 addr += IOVP_SIZE; 763 size -= IOVP_SIZE; 764 pdir_start++; 765 } 766 767 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 768 asm_io_sync(); 769 770 #ifdef ASSERT_PDIR_SANITY 771 sba_check_pdir(ioc,"Check after sba_map_single()"); 772 #endif 773 spin_unlock_irqrestore(&ioc->res_lock, flags); 774 775 /* form complete address */ 776 return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG); 777 } 778 779 780 static dma_addr_t 781 sba_map_page(struct device *dev, struct page *page, unsigned long offset, 782 size_t size, enum dma_data_direction direction, 783 unsigned long attrs) 784 { 785 return sba_map_single(dev, page_address(page) + offset, size, 786 direction); 787 } 788 789 790 /** 791 * sba_unmap_page - unmap one IOVA and free resources 792 * @dev: instance of PCI owned by the driver that's asking. 793 * @iova: IOVA of driver buffer previously mapped. 794 * @size: number of bytes mapped in driver buffer. 795 * @direction: R/W or both. 796 * 797 * See Documentation/core-api/dma-api-howto.rst 798 */ 799 static void 800 sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 801 enum dma_data_direction direction, unsigned long attrs) 802 { 803 struct ioc *ioc; 804 #if DELAYED_RESOURCE_CNT > 0 805 struct sba_dma_pair *d; 806 #endif 807 unsigned long flags; 808 dma_addr_t offset; 809 810 DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size); 811 812 ioc = GET_IOC(dev); 813 if (!ioc) { 814 WARN_ON(!ioc); 815 return; 816 } 817 offset = iova & ~IOVP_MASK; 818 iova ^= offset; /* clear offset bits */ 819 size += offset; 820 size = ALIGN(size, IOVP_SIZE); 821 822 spin_lock_irqsave(&ioc->res_lock, flags); 823 824 #ifdef SBA_COLLECT_STATS 825 ioc->usingle_calls++; 826 ioc->usingle_pages += size >> IOVP_SHIFT; 827 #endif 828 829 sba_mark_invalid(ioc, iova, size); 830 831 #if DELAYED_RESOURCE_CNT > 0 832 /* Delaying when we re-use a IO Pdir entry reduces the number 833 * of MMIO reads needed to flush writes to the PCOM register. 834 */ 835 d = &(ioc->saved[ioc->saved_cnt]); 836 d->iova = iova; 837 d->size = size; 838 if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) { 839 int cnt = ioc->saved_cnt; 840 while (cnt--) { 841 sba_free_range(ioc, d->iova, d->size); 842 d--; 843 } 844 ioc->saved_cnt = 0; 845 846 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 847 } 848 #else /* DELAYED_RESOURCE_CNT == 0 */ 849 sba_free_range(ioc, iova, size); 850 851 /* If fdc's were issued, force fdc's to be visible now */ 852 asm_io_sync(); 853 854 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 855 #endif /* DELAYED_RESOURCE_CNT == 0 */ 856 857 spin_unlock_irqrestore(&ioc->res_lock, flags); 858 859 /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support. 860 ** For Astro based systems this isn't a big deal WRT performance. 861 ** As long as 2.4 kernels copyin/copyout data from/to userspace, 862 ** we don't need the syncdma. The issue here is I/O MMU cachelines 863 ** are *not* coherent in all cases. May be hwrev dependent. 864 ** Need to investigate more. 865 asm volatile("syncdma"); 866 */ 867 } 868 869 870 /** 871 * sba_alloc - allocate/map shared mem for DMA 872 * @hwdev: instance of PCI owned by the driver that's asking. 873 * @size: number of bytes mapped in driver buffer. 874 * @dma_handle: IOVA of new buffer. 875 * 876 * See Documentation/core-api/dma-api-howto.rst 877 */ 878 static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, 879 gfp_t gfp, unsigned long attrs) 880 { 881 void *ret; 882 883 if (!hwdev) { 884 /* only support PCI */ 885 *dma_handle = 0; 886 return NULL; 887 } 888 889 ret = (void *) __get_free_pages(gfp, get_order(size)); 890 891 if (ret) { 892 memset(ret, 0, size); 893 *dma_handle = sba_map_single(hwdev, ret, size, 0); 894 } 895 896 return ret; 897 } 898 899 900 /** 901 * sba_free - free/unmap shared mem for DMA 902 * @hwdev: instance of PCI owned by the driver that's asking. 903 * @size: number of bytes mapped in driver buffer. 904 * @vaddr: virtual address IOVA of "consistent" buffer. 905 * @dma_handler: IO virtual address of "consistent" buffer. 906 * 907 * See Documentation/core-api/dma-api-howto.rst 908 */ 909 static void 910 sba_free(struct device *hwdev, size_t size, void *vaddr, 911 dma_addr_t dma_handle, unsigned long attrs) 912 { 913 sba_unmap_page(hwdev, dma_handle, size, 0, 0); 914 free_pages((unsigned long) vaddr, get_order(size)); 915 } 916 917 918 /* 919 ** Since 0 is a valid pdir_base index value, can't use that 920 ** to determine if a value is valid or not. Use a flag to indicate 921 ** the SG list entry contains a valid pdir index. 922 */ 923 #define PIDE_FLAG 0x80000000UL 924 925 #ifdef SBA_COLLECT_STATS 926 #define IOMMU_MAP_STATS 927 #endif 928 #include "iommu-helpers.h" 929 930 #ifdef DEBUG_LARGE_SG_ENTRIES 931 int dump_run_sg = 0; 932 #endif 933 934 935 /** 936 * sba_map_sg - map Scatter/Gather list 937 * @dev: instance of PCI owned by the driver that's asking. 938 * @sglist: array of buffer/length pairs 939 * @nents: number of entries in list 940 * @direction: R/W or both. 941 * 942 * See Documentation/core-api/dma-api-howto.rst 943 */ 944 static int 945 sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, 946 enum dma_data_direction direction, unsigned long attrs) 947 { 948 struct ioc *ioc; 949 int coalesced, filled = 0; 950 unsigned long flags; 951 952 DBG_RUN_SG("%s() START %d entries\n", __func__, nents); 953 954 ioc = GET_IOC(dev); 955 if (!ioc) 956 return -EINVAL; 957 958 /* Fast path single entry scatterlists. */ 959 if (nents == 1) { 960 sg_dma_address(sglist) = sba_map_single(dev, sg_virt(sglist), 961 sglist->length, direction); 962 sg_dma_len(sglist) = sglist->length; 963 return 1; 964 } 965 966 spin_lock_irqsave(&ioc->res_lock, flags); 967 968 #ifdef ASSERT_PDIR_SANITY 969 if (sba_check_pdir(ioc,"Check before sba_map_sg()")) 970 { 971 sba_dump_sg(ioc, sglist, nents); 972 panic("Check before sba_map_sg()"); 973 } 974 #endif 975 976 #ifdef SBA_COLLECT_STATS 977 ioc->msg_calls++; 978 #endif 979 980 /* 981 ** First coalesce the chunks and allocate I/O pdir space 982 ** 983 ** If this is one DMA stream, we can properly map using the 984 ** correct virtual address associated with each DMA page. 985 ** w/o this association, we wouldn't have coherent DMA! 986 ** Access to the virtual address is what forces a two pass algorithm. 987 */ 988 coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents, sba_alloc_range); 989 990 /* 991 ** Program the I/O Pdir 992 ** 993 ** map the virtual addresses to the I/O Pdir 994 ** o dma_address will contain the pdir index 995 ** o dma_len will contain the number of bytes to map 996 ** o address contains the virtual address. 997 */ 998 filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry); 999 1000 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 1001 asm_io_sync(); 1002 1003 #ifdef ASSERT_PDIR_SANITY 1004 if (sba_check_pdir(ioc,"Check after sba_map_sg()")) 1005 { 1006 sba_dump_sg(ioc, sglist, nents); 1007 panic("Check after sba_map_sg()\n"); 1008 } 1009 #endif 1010 1011 spin_unlock_irqrestore(&ioc->res_lock, flags); 1012 1013 DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled); 1014 1015 return filled; 1016 } 1017 1018 1019 /** 1020 * sba_unmap_sg - unmap Scatter/Gather list 1021 * @dev: instance of PCI owned by the driver that's asking. 1022 * @sglist: array of buffer/length pairs 1023 * @nents: number of entries in list 1024 * @direction: R/W or both. 1025 * 1026 * See Documentation/core-api/dma-api-howto.rst 1027 */ 1028 static void 1029 sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, 1030 enum dma_data_direction direction, unsigned long attrs) 1031 { 1032 struct ioc *ioc; 1033 #ifdef ASSERT_PDIR_SANITY 1034 unsigned long flags; 1035 #endif 1036 1037 DBG_RUN_SG("%s() START %d entries, %p,%x\n", 1038 __func__, nents, sg_virt(sglist), sglist->length); 1039 1040 ioc = GET_IOC(dev); 1041 if (!ioc) { 1042 WARN_ON(!ioc); 1043 return; 1044 } 1045 1046 #ifdef SBA_COLLECT_STATS 1047 ioc->usg_calls++; 1048 #endif 1049 1050 #ifdef ASSERT_PDIR_SANITY 1051 spin_lock_irqsave(&ioc->res_lock, flags); 1052 sba_check_pdir(ioc,"Check before sba_unmap_sg()"); 1053 spin_unlock_irqrestore(&ioc->res_lock, flags); 1054 #endif 1055 1056 while (nents && sg_dma_len(sglist)) { 1057 1058 sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist), 1059 direction, 0); 1060 #ifdef SBA_COLLECT_STATS 1061 ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT; 1062 ioc->usingle_calls--; /* kluge since call is unmap_sg() */ 1063 #endif 1064 ++sglist; 1065 nents--; 1066 } 1067 1068 DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents); 1069 1070 #ifdef ASSERT_PDIR_SANITY 1071 spin_lock_irqsave(&ioc->res_lock, flags); 1072 sba_check_pdir(ioc,"Check after sba_unmap_sg()"); 1073 spin_unlock_irqrestore(&ioc->res_lock, flags); 1074 #endif 1075 1076 } 1077 1078 static const struct dma_map_ops sba_ops = { 1079 .dma_supported = sba_dma_supported, 1080 .alloc = sba_alloc, 1081 .free = sba_free, 1082 .map_page = sba_map_page, 1083 .unmap_page = sba_unmap_page, 1084 .map_sg = sba_map_sg, 1085 .unmap_sg = sba_unmap_sg, 1086 .get_sgtable = dma_common_get_sgtable, 1087 .alloc_pages = dma_common_alloc_pages, 1088 .free_pages = dma_common_free_pages, 1089 }; 1090 1091 1092 /************************************************************************** 1093 ** 1094 ** SBA PAT PDC support 1095 ** 1096 ** o call pdc_pat_cell_module() 1097 ** o store ranges in PCI "resource" structures 1098 ** 1099 **************************************************************************/ 1100 1101 static void 1102 sba_get_pat_resources(struct sba_device *sba_dev) 1103 { 1104 #if 0 1105 /* 1106 ** TODO/REVISIT/FIXME: support for directed ranges requires calls to 1107 ** PAT PDC to program the SBA/LBA directed range registers...this 1108 ** burden may fall on the LBA code since it directly supports the 1109 ** PCI subsystem. It's not clear yet. - ggg 1110 */ 1111 PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp); 1112 FIXME : ??? 1113 PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp); 1114 Tells where the dvi bits are located in the address. 1115 PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp); 1116 FIXME : ??? 1117 #endif 1118 } 1119 1120 1121 /************************************************************** 1122 * 1123 * Initialization and claim 1124 * 1125 ***************************************************************/ 1126 #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */ 1127 #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */ 1128 static void * 1129 sba_alloc_pdir(unsigned int pdir_size) 1130 { 1131 unsigned long pdir_base; 1132 unsigned long pdir_order = get_order(pdir_size); 1133 1134 pdir_base = __get_free_pages(GFP_KERNEL, pdir_order); 1135 if (NULL == (void *) pdir_base) { 1136 panic("%s() could not allocate I/O Page Table\n", 1137 __func__); 1138 } 1139 1140 /* If this is not PA8700 (PCX-W2) 1141 ** OR newer than ver 2.2 1142 ** OR in a system that doesn't need VINDEX bits from SBA, 1143 ** 1144 ** then we aren't exposed to the HW bug. 1145 */ 1146 if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13 1147 || (boot_cpu_data.pdc.versions > 0x202) 1148 || (boot_cpu_data.pdc.capabilities & 0x08L) ) 1149 return (void *) pdir_base; 1150 1151 /* 1152 * PA8700 (PCX-W2, aka piranha) silent data corruption fix 1153 * 1154 * An interaction between PA8700 CPU (Ver 2.2 or older) and 1155 * Ike/Astro can cause silent data corruption. This is only 1156 * a problem if the I/O PDIR is located in memory such that 1157 * (little-endian) bits 17 and 18 are on and bit 20 is off. 1158 * 1159 * Since the max IO Pdir size is 2MB, by cleverly allocating the 1160 * right physical address, we can either avoid (IOPDIR <= 1MB) 1161 * or minimize (2MB IO Pdir) the problem if we restrict the 1162 * IO Pdir to a maximum size of 2MB-128K (1902K). 1163 * 1164 * Because we always allocate 2^N sized IO pdirs, either of the 1165 * "bad" regions will be the last 128K if at all. That's easy 1166 * to test for. 1167 * 1168 */ 1169 if (pdir_order <= (19-12)) { 1170 if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) { 1171 /* allocate a new one on 512k alignment */ 1172 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12)); 1173 /* release original */ 1174 free_pages(pdir_base, pdir_order); 1175 1176 pdir_base = new_pdir; 1177 1178 /* release excess */ 1179 while (pdir_order < (19-12)) { 1180 new_pdir += pdir_size; 1181 free_pages(new_pdir, pdir_order); 1182 pdir_order +=1; 1183 pdir_size <<=1; 1184 } 1185 } 1186 } else { 1187 /* 1188 ** 1MB or 2MB Pdir 1189 ** Needs to be aligned on an "odd" 1MB boundary. 1190 */ 1191 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */ 1192 1193 /* release original */ 1194 free_pages( pdir_base, pdir_order); 1195 1196 /* release first 1MB */ 1197 free_pages(new_pdir, 20-12); 1198 1199 pdir_base = new_pdir + 1024*1024; 1200 1201 if (pdir_order > (20-12)) { 1202 /* 1203 ** 2MB Pdir. 1204 ** 1205 ** Flag tells init_bitmap() to mark bad 128k as used 1206 ** and to reduce the size by 128k. 1207 */ 1208 piranha_bad_128k = 1; 1209 1210 new_pdir += 3*1024*1024; 1211 /* release last 1MB */ 1212 free_pages(new_pdir, 20-12); 1213 1214 /* release unusable 128KB */ 1215 free_pages(new_pdir - 128*1024 , 17-12); 1216 1217 pdir_size -= 128*1024; 1218 } 1219 } 1220 1221 memset((void *) pdir_base, 0, pdir_size); 1222 return (void *) pdir_base; 1223 } 1224 1225 struct ibase_data_struct { 1226 struct ioc *ioc; 1227 int ioc_num; 1228 }; 1229 1230 static int setup_ibase_imask_callback(struct device *dev, void *data) 1231 { 1232 /* lba_set_iregs() is in drivers/parisc/lba_pci.c */ 1233 extern void lba_set_iregs(struct parisc_device *, u32, u32); 1234 struct parisc_device *lba = to_parisc_device(dev); 1235 struct ibase_data_struct *ibd = data; 1236 int rope_num = (lba->hpa.start >> 13) & 0xf; 1237 if (rope_num >> 3 == ibd->ioc_num) 1238 lba_set_iregs(lba, ibd->ioc->ibase, ibd->ioc->imask); 1239 return 0; 1240 } 1241 1242 /* setup Mercury or Elroy IBASE/IMASK registers. */ 1243 static void 1244 setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1245 { 1246 struct ibase_data_struct ibase_data = { 1247 .ioc = ioc, 1248 .ioc_num = ioc_num, 1249 }; 1250 1251 device_for_each_child(&sba->dev, &ibase_data, 1252 setup_ibase_imask_callback); 1253 } 1254 1255 #ifdef SBA_AGP_SUPPORT 1256 static int 1257 sba_ioc_find_quicksilver(struct device *dev, void *data) 1258 { 1259 int *agp_found = data; 1260 struct parisc_device *lba = to_parisc_device(dev); 1261 1262 if (IS_QUICKSILVER(lba)) 1263 *agp_found = 1; 1264 return 0; 1265 } 1266 #endif 1267 1268 static void 1269 sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1270 { 1271 u32 iova_space_mask; 1272 u32 iova_space_size; 1273 int iov_order, tcnfg; 1274 #ifdef SBA_AGP_SUPPORT 1275 int agp_found = 0; 1276 #endif 1277 /* 1278 ** Firmware programs the base and size of a "safe IOVA space" 1279 ** (one that doesn't overlap memory or LMMIO space) in the 1280 ** IBASE and IMASK registers. 1281 */ 1282 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1fffffULL; 1283 iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; 1284 1285 if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) { 1286 printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n"); 1287 iova_space_size /= 2; 1288 } 1289 1290 /* 1291 ** iov_order is always based on a 1GB IOVA space since we want to 1292 ** turn on the other half for AGP GART. 1293 */ 1294 iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT)); 1295 ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64); 1296 1297 DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n", 1298 __func__, ioc->ioc_hpa, iova_space_size >> 20, 1299 iov_order + PAGE_SHIFT); 1300 1301 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL, 1302 get_order(ioc->pdir_size)); 1303 if (!ioc->pdir_base) 1304 panic("Couldn't allocate I/O Page Table\n"); 1305 1306 memset(ioc->pdir_base, 0, ioc->pdir_size); 1307 1308 DBG_INIT("%s() pdir %p size %x\n", 1309 __func__, ioc->pdir_base, ioc->pdir_size); 1310 1311 #ifdef SBA_HINT_SUPPORT 1312 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1313 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1314 1315 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1316 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1317 #endif 1318 1319 WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base); 1320 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1321 1322 /* build IMASK for IOC and Elroy */ 1323 iova_space_mask = 0xffffffff; 1324 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1325 ioc->imask = iova_space_mask; 1326 #ifdef ZX1_SUPPORT 1327 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1328 #endif 1329 sba_dump_tlb(ioc->ioc_hpa); 1330 1331 setup_ibase_imask(sba, ioc, ioc_num); 1332 1333 WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK); 1334 1335 #ifdef CONFIG_64BIT 1336 /* 1337 ** Setting the upper bits makes checking for bypass addresses 1338 ** a little faster later on. 1339 */ 1340 ioc->imask |= 0xFFFFFFFF00000000UL; 1341 #endif 1342 1343 /* Set I/O PDIR Page size to system page size */ 1344 switch (PAGE_SHIFT) { 1345 case 12: tcnfg = 0; break; /* 4K */ 1346 case 13: tcnfg = 1; break; /* 8K */ 1347 case 14: tcnfg = 2; break; /* 16K */ 1348 case 16: tcnfg = 3; break; /* 64K */ 1349 default: 1350 panic(__FILE__ "Unsupported system page size %d", 1351 1 << PAGE_SHIFT); 1352 break; 1353 } 1354 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG); 1355 1356 /* 1357 ** Program the IOC's ibase and enable IOVA translation 1358 ** Bit zero == enable bit. 1359 */ 1360 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE); 1361 1362 /* 1363 ** Clear I/O TLB of any possible entries. 1364 ** (Yes. This is a bit paranoid...but so what) 1365 */ 1366 WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM); 1367 1368 #ifdef SBA_AGP_SUPPORT 1369 1370 /* 1371 ** If an AGP device is present, only use half of the IOV space 1372 ** for PCI DMA. Unfortunately we can't know ahead of time 1373 ** whether GART support will actually be used, for now we 1374 ** can just key on any AGP device found in the system. 1375 ** We program the next pdir index after we stop w/ a key for 1376 ** the GART code to handshake on. 1377 */ 1378 device_for_each_child(&sba->dev, &agp_found, sba_ioc_find_quicksilver); 1379 1380 if (agp_found && sba_reserve_agpgart) { 1381 printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n", 1382 __func__, (iova_space_size/2) >> 20); 1383 ioc->pdir_size /= 2; 1384 ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE; 1385 } 1386 #endif /*SBA_AGP_SUPPORT*/ 1387 } 1388 1389 static void 1390 sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1391 { 1392 u32 iova_space_size, iova_space_mask; 1393 unsigned int pdir_size, iov_order, tcnfg; 1394 1395 /* 1396 ** Determine IOVA Space size from memory size. 1397 ** 1398 ** Ideally, PCI drivers would register the maximum number 1399 ** of DMA they can have outstanding for each device they 1400 ** own. Next best thing would be to guess how much DMA 1401 ** can be outstanding based on PCI Class/sub-class. Both 1402 ** methods still require some "extra" to support PCI 1403 ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). 1404 ** 1405 ** While we have 32-bits "IOVA" space, top two 2 bits are used 1406 ** for DMA hints - ergo only 30 bits max. 1407 */ 1408 1409 iova_space_size = (u32) (totalram_pages()/global_ioc_cnt); 1410 1411 /* limit IOVA space size to 1MB-1GB */ 1412 if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { 1413 iova_space_size = 1 << (20 - PAGE_SHIFT); 1414 } 1415 else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) { 1416 iova_space_size = 1 << (30 - PAGE_SHIFT); 1417 } 1418 1419 /* 1420 ** iova space must be log2() in size. 1421 ** thus, pdir/res_map will also be log2(). 1422 ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced) 1423 */ 1424 iov_order = get_order(iova_space_size << PAGE_SHIFT); 1425 1426 /* iova_space_size is now bytes, not pages */ 1427 iova_space_size = 1 << (iov_order + PAGE_SHIFT); 1428 1429 ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64); 1430 1431 DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n", 1432 __func__, 1433 ioc->ioc_hpa, 1434 (unsigned long) totalram_pages() >> (20 - PAGE_SHIFT), 1435 iova_space_size>>20, 1436 iov_order + PAGE_SHIFT); 1437 1438 ioc->pdir_base = sba_alloc_pdir(pdir_size); 1439 1440 DBG_INIT("%s() pdir %p size %x\n", 1441 __func__, ioc->pdir_base, pdir_size); 1442 1443 #ifdef SBA_HINT_SUPPORT 1444 /* FIXME : DMA HINTs not used */ 1445 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1446 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1447 1448 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1449 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1450 #endif 1451 1452 WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1453 1454 /* build IMASK for IOC and Elroy */ 1455 iova_space_mask = 0xffffffff; 1456 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1457 1458 /* 1459 ** On C3000 w/512MB mem, HP-UX 10.20 reports: 1460 ** ibase=0, imask=0xFE000000, size=0x2000000. 1461 */ 1462 ioc->ibase = 0; 1463 ioc->imask = iova_space_mask; /* save it */ 1464 #ifdef ZX1_SUPPORT 1465 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1466 #endif 1467 1468 DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n", 1469 __func__, ioc->ibase, ioc->imask); 1470 1471 /* 1472 ** FIXME: Hint registers are programmed with default hint 1473 ** values during boot, so hints should be sane even if we 1474 ** can't reprogram them the way drivers want. 1475 */ 1476 1477 setup_ibase_imask(sba, ioc, ioc_num); 1478 1479 /* 1480 ** Program the IOC's ibase and enable IOVA translation 1481 */ 1482 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE); 1483 WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK); 1484 1485 /* Set I/O PDIR Page size to system page size */ 1486 switch (PAGE_SHIFT) { 1487 case 12: tcnfg = 0; break; /* 4K */ 1488 case 13: tcnfg = 1; break; /* 8K */ 1489 case 14: tcnfg = 2; break; /* 16K */ 1490 case 16: tcnfg = 3; break; /* 64K */ 1491 default: 1492 panic(__FILE__ "Unsupported system page size %d", 1493 1 << PAGE_SHIFT); 1494 break; 1495 } 1496 /* Set I/O PDIR Page size to PAGE_SIZE (4k/16k/...) */ 1497 WRITE_REG(tcnfg, ioc->ioc_hpa+IOC_TCNFG); 1498 1499 /* 1500 ** Clear I/O TLB of any possible entries. 1501 ** (Yes. This is a bit paranoid...but so what) 1502 */ 1503 WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM); 1504 1505 ioc->ibase = 0; /* used by SBA_IOVA and related macros */ 1506 1507 DBG_INIT("%s() DONE\n", __func__); 1508 } 1509 1510 1511 1512 /************************************************************************** 1513 ** 1514 ** SBA initialization code (HW and SW) 1515 ** 1516 ** o identify SBA chip itself 1517 ** o initialize SBA chip modes (HardFail) 1518 ** o initialize SBA chip modes (HardFail) 1519 ** o FIXME: initialize DMA hints for reasonable defaults 1520 ** 1521 **************************************************************************/ 1522 1523 static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset) 1524 { 1525 return ioremap(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE); 1526 } 1527 1528 static void sba_hw_init(struct sba_device *sba_dev) 1529 { 1530 int i; 1531 int num_ioc; 1532 u64 ioc_ctl; 1533 1534 if (!is_pdc_pat()) { 1535 /* Shutdown the USB controller on Astro-based workstations. 1536 ** Once we reprogram the IOMMU, the next DMA performed by 1537 ** USB will HPMC the box. USB is only enabled if a 1538 ** keyboard is present and found. 1539 ** 1540 ** With serial console, j6k v5.0 firmware says: 1541 ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7 1542 ** 1543 ** FIXME: Using GFX+USB console at power up but direct 1544 ** linux to serial console is still broken. 1545 ** USB could generate DMA so we must reset USB. 1546 ** The proper sequence would be: 1547 ** o block console output 1548 ** o reset USB device 1549 ** o reprogram serial port 1550 ** o unblock console output 1551 */ 1552 if (PAGE0->mem_kbd.cl_class == CL_KEYBD) { 1553 pdc_io_reset_devices(); 1554 } 1555 1556 } 1557 1558 1559 #if 0 1560 printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa, 1561 PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class); 1562 1563 /* 1564 ** Need to deal with DMA from LAN. 1565 ** Maybe use page zero boot device as a handle to talk 1566 ** to PDC about which device to shutdown. 1567 ** 1568 ** Netbooting, j6k v5.0 firmware says: 1569 ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002 1570 ** ARGH! invalid class. 1571 */ 1572 if ((PAGE0->mem_boot.cl_class != CL_RANDOM) 1573 && (PAGE0->mem_boot.cl_class != CL_SEQU)) { 1574 pdc_io_reset(); 1575 } 1576 #endif 1577 1578 if (!IS_PLUTO(sba_dev->dev)) { 1579 ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL); 1580 DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->", 1581 __func__, sba_dev->sba_hpa, ioc_ctl); 1582 ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE); 1583 ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC; 1584 /* j6700 v1.6 firmware sets 0x294f */ 1585 /* A500 firmware sets 0x4d */ 1586 1587 WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL); 1588 1589 #ifdef DEBUG_SBA_INIT 1590 ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL); 1591 DBG_INIT(" 0x%Lx\n", ioc_ctl); 1592 #endif 1593 } /* if !PLUTO */ 1594 1595 if (IS_ASTRO(sba_dev->dev)) { 1596 int err; 1597 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET); 1598 num_ioc = 1; 1599 1600 sba_dev->chip_resv.name = "Astro Intr Ack"; 1601 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL; 1602 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ; 1603 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1604 BUG_ON(err < 0); 1605 1606 } else if (IS_PLUTO(sba_dev->dev)) { 1607 int err; 1608 1609 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET); 1610 num_ioc = 1; 1611 1612 sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA"; 1613 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL; 1614 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1); 1615 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1616 WARN_ON(err < 0); 1617 1618 sba_dev->iommu_resv.name = "IOVA Space"; 1619 sba_dev->iommu_resv.start = 0x40000000UL; 1620 sba_dev->iommu_resv.end = 0x50000000UL - 1; 1621 err = request_resource(&iomem_resource, &(sba_dev->iommu_resv)); 1622 WARN_ON(err < 0); 1623 } else { 1624 /* IKE, REO */ 1625 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0)); 1626 sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1)); 1627 num_ioc = 2; 1628 1629 /* TODO - LOOKUP Ike/Stretch chipset mem map */ 1630 } 1631 /* XXX: What about Reo Grande? */ 1632 1633 sba_dev->num_ioc = num_ioc; 1634 for (i = 0; i < num_ioc; i++) { 1635 void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa; 1636 unsigned int j; 1637 1638 for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) { 1639 1640 /* 1641 * Clear ROPE(N)_CONFIG AO bit. 1642 * Disables "NT Ordering" (~= !"Relaxed Ordering") 1643 * Overrides bit 1 in DMA Hint Sets. 1644 * Improves netperf UDP_STREAM by ~10% for bcm5701. 1645 */ 1646 if (IS_PLUTO(sba_dev->dev)) { 1647 void __iomem *rope_cfg; 1648 unsigned long cfg_val; 1649 1650 rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j; 1651 cfg_val = READ_REG(rope_cfg); 1652 cfg_val &= ~IOC_ROPE_AO; 1653 WRITE_REG(cfg_val, rope_cfg); 1654 } 1655 1656 /* 1657 ** Make sure the box crashes on rope errors. 1658 */ 1659 WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j); 1660 } 1661 1662 /* flush out the last writes */ 1663 READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); 1664 1665 DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n", 1666 i, 1667 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40), 1668 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50) 1669 ); 1670 DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n", 1671 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108), 1672 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400) 1673 ); 1674 1675 if (IS_PLUTO(sba_dev->dev)) { 1676 sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i); 1677 } else { 1678 sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i); 1679 } 1680 } 1681 } 1682 1683 static void 1684 sba_common_init(struct sba_device *sba_dev) 1685 { 1686 int i; 1687 1688 /* add this one to the head of the list (order doesn't matter) 1689 ** This will be useful for debugging - especially if we get coredumps 1690 */ 1691 sba_dev->next = sba_list; 1692 sba_list = sba_dev; 1693 1694 for(i=0; i< sba_dev->num_ioc; i++) { 1695 int res_size; 1696 #ifdef DEBUG_DMB_TRAP 1697 extern void iterate_pages(unsigned long , unsigned long , 1698 void (*)(pte_t * , unsigned long), 1699 unsigned long ); 1700 void set_data_memory_break(pte_t * , unsigned long); 1701 #endif 1702 /* resource map size dictated by pdir_size */ 1703 res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */ 1704 1705 /* Second part of PIRANHA BUG */ 1706 if (piranha_bad_128k) { 1707 res_size -= (128*1024)/sizeof(u64); 1708 } 1709 1710 res_size >>= 3; /* convert bit count to byte count */ 1711 DBG_INIT("%s() res_size 0x%x\n", 1712 __func__, res_size); 1713 1714 sba_dev->ioc[i].res_size = res_size; 1715 sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size)); 1716 1717 #ifdef DEBUG_DMB_TRAP 1718 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1719 set_data_memory_break, 0); 1720 #endif 1721 1722 if (NULL == sba_dev->ioc[i].res_map) 1723 { 1724 panic("%s:%s() could not allocate resource map\n", 1725 __FILE__, __func__ ); 1726 } 1727 1728 memset(sba_dev->ioc[i].res_map, 0, res_size); 1729 /* next available IOVP - circular search */ 1730 sba_dev->ioc[i].res_hint = (unsigned long *) 1731 &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]); 1732 1733 #ifdef ASSERT_PDIR_SANITY 1734 /* Mark first bit busy - ie no IOVA 0 */ 1735 sba_dev->ioc[i].res_map[0] = 0x80; 1736 sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL; 1737 #endif 1738 1739 /* Third (and last) part of PIRANHA BUG */ 1740 if (piranha_bad_128k) { 1741 /* region from +1408K to +1536 is un-usable. */ 1742 1743 int idx_start = (1408*1024/sizeof(u64)) >> 3; 1744 int idx_end = (1536*1024/sizeof(u64)) >> 3; 1745 long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]); 1746 long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]); 1747 1748 /* mark that part of the io pdir busy */ 1749 while (p_start < p_end) 1750 *p_start++ = -1; 1751 1752 } 1753 1754 #ifdef DEBUG_DMB_TRAP 1755 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1756 set_data_memory_break, 0); 1757 iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size, 1758 set_data_memory_break, 0); 1759 #endif 1760 1761 DBG_INIT("%s() %d res_map %x %p\n", 1762 __func__, i, res_size, sba_dev->ioc[i].res_map); 1763 } 1764 1765 spin_lock_init(&sba_dev->sba_lock); 1766 ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC; 1767 1768 #ifdef DEBUG_SBA_INIT 1769 /* 1770 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 1771 * (bit #61, big endian), we have to flush and sync every time 1772 * IO-PDIR is changed in Ike/Astro. 1773 */ 1774 if (ioc_needs_fdc) { 1775 printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n"); 1776 } else { 1777 printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n"); 1778 } 1779 #endif 1780 } 1781 1782 #ifdef CONFIG_PROC_FS 1783 static int sba_proc_info(struct seq_file *m, void *p) 1784 { 1785 struct sba_device *sba_dev = sba_list; 1786 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1787 int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */ 1788 #ifdef SBA_COLLECT_STATS 1789 unsigned long avg = 0, min, max; 1790 #endif 1791 int i; 1792 1793 seq_printf(m, "%s rev %d.%d\n", 1794 sba_dev->name, 1795 (sba_dev->hw_rev & 0x7) + 1, 1796 (sba_dev->hw_rev & 0x18) >> 3); 1797 seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", 1798 (int)((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */ 1799 total_pages); 1800 1801 seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", 1802 ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */ 1803 1804 seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n", 1805 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE), 1806 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK), 1807 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)); 1808 1809 for (i=0; i<4; i++) 1810 seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", 1811 i, 1812 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18), 1813 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18), 1814 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)); 1815 1816 #ifdef SBA_COLLECT_STATS 1817 seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", 1818 total_pages - ioc->used_pages, ioc->used_pages, 1819 (int)(ioc->used_pages * 100 / total_pages)); 1820 1821 min = max = ioc->avg_search[0]; 1822 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) { 1823 avg += ioc->avg_search[i]; 1824 if (ioc->avg_search[i] > max) max = ioc->avg_search[i]; 1825 if (ioc->avg_search[i] < min) min = ioc->avg_search[i]; 1826 } 1827 avg /= SBA_SEARCH_SAMPLE; 1828 seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", 1829 min, avg, max); 1830 1831 seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n", 1832 ioc->msingle_calls, ioc->msingle_pages, 1833 (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls)); 1834 1835 /* KLUGE - unmap_sg calls unmap_single for each mapped page */ 1836 min = ioc->usingle_calls; 1837 max = ioc->usingle_pages - ioc->usg_pages; 1838 seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n", 1839 min, max, (int)((max * 1000)/min)); 1840 1841 seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1842 ioc->msg_calls, ioc->msg_pages, 1843 (int)((ioc->msg_pages * 1000)/ioc->msg_calls)); 1844 1845 seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1846 ioc->usg_calls, ioc->usg_pages, 1847 (int)((ioc->usg_pages * 1000)/ioc->usg_calls)); 1848 #endif 1849 1850 return 0; 1851 } 1852 1853 static int 1854 sba_proc_bitmap_info(struct seq_file *m, void *p) 1855 { 1856 struct sba_device *sba_dev = sba_list; 1857 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1858 1859 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, ioc->res_map, 1860 ioc->res_size, false); 1861 seq_putc(m, '\n'); 1862 1863 return 0; 1864 } 1865 #endif /* CONFIG_PROC_FS */ 1866 1867 static const struct parisc_device_id sba_tbl[] __initconst = { 1868 { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb }, 1869 { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc }, 1870 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc }, 1871 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc }, 1872 { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc }, 1873 { 0, } 1874 }; 1875 1876 static int sba_driver_callback(struct parisc_device *); 1877 1878 static struct parisc_driver sba_driver __refdata = { 1879 .name = MODULE_NAME, 1880 .id_table = sba_tbl, 1881 .probe = sba_driver_callback, 1882 }; 1883 1884 /* 1885 ** Determine if sba should claim this chip (return 0) or not (return 1). 1886 ** If so, initialize the chip and tell other partners in crime they 1887 ** have work to do. 1888 */ 1889 static int __init sba_driver_callback(struct parisc_device *dev) 1890 { 1891 struct sba_device *sba_dev; 1892 u32 func_class; 1893 int i; 1894 char *version; 1895 void __iomem *sba_addr = ioremap(dev->hpa.start, SBA_FUNC_SIZE); 1896 #ifdef CONFIG_PROC_FS 1897 struct proc_dir_entry *root; 1898 #endif 1899 1900 sba_dump_ranges(sba_addr); 1901 1902 /* Read HW Rev First */ 1903 func_class = READ_REG(sba_addr + SBA_FCLASS); 1904 1905 if (IS_ASTRO(dev)) { 1906 unsigned long fclass; 1907 static char astro_rev[]="Astro ?.?"; 1908 1909 /* Astro is broken...Read HW Rev First */ 1910 fclass = READ_REG(sba_addr); 1911 1912 astro_rev[6] = '1' + (char) (fclass & 0x7); 1913 astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3); 1914 version = astro_rev; 1915 1916 } else if (IS_IKE(dev)) { 1917 static char ike_rev[] = "Ike rev ?"; 1918 ike_rev[8] = '0' + (char) (func_class & 0xff); 1919 version = ike_rev; 1920 } else if (IS_PLUTO(dev)) { 1921 static char pluto_rev[]="Pluto ?.?"; 1922 pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4); 1923 pluto_rev[8] = '0' + (char) (func_class & 0x0f); 1924 version = pluto_rev; 1925 } else { 1926 static char reo_rev[] = "REO rev ?"; 1927 reo_rev[8] = '0' + (char) (func_class & 0xff); 1928 version = reo_rev; 1929 } 1930 1931 if (!global_ioc_cnt) { 1932 global_ioc_cnt = count_parisc_driver(&sba_driver); 1933 1934 /* Astro and Pluto have one IOC per SBA */ 1935 if ((!IS_ASTRO(dev)) || (!IS_PLUTO(dev))) 1936 global_ioc_cnt *= 2; 1937 } 1938 1939 printk(KERN_INFO "%s found %s at 0x%llx\n", 1940 MODULE_NAME, version, (unsigned long long)dev->hpa.start); 1941 1942 sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL); 1943 if (!sba_dev) { 1944 printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n"); 1945 return -ENOMEM; 1946 } 1947 1948 parisc_set_drvdata(dev, sba_dev); 1949 1950 for(i=0; i<MAX_IOC; i++) 1951 spin_lock_init(&(sba_dev->ioc[i].res_lock)); 1952 1953 sba_dev->dev = dev; 1954 sba_dev->hw_rev = func_class; 1955 sba_dev->name = dev->name; 1956 sba_dev->sba_hpa = sba_addr; 1957 1958 sba_get_pat_resources(sba_dev); 1959 sba_hw_init(sba_dev); 1960 sba_common_init(sba_dev); 1961 1962 hppa_dma_ops = &sba_ops; 1963 1964 #ifdef CONFIG_PROC_FS 1965 switch (dev->id.hversion) { 1966 case PLUTO_MCKINLEY_PORT: 1967 root = proc_mckinley_root; 1968 break; 1969 case ASTRO_RUNWAY_PORT: 1970 case IKE_MERCED_PORT: 1971 default: 1972 root = proc_runway_root; 1973 break; 1974 } 1975 1976 proc_create_single("sba_iommu", 0, root, sba_proc_info); 1977 proc_create_single("sba_iommu-bitmap", 0, root, sba_proc_bitmap_info); 1978 #endif 1979 return 0; 1980 } 1981 1982 /* 1983 ** One time initialization to let the world know the SBA was found. 1984 ** This is the only routine which is NOT static. 1985 ** Must be called exactly once before pci_init(). 1986 */ 1987 void __init sba_init(void) 1988 { 1989 register_parisc_driver(&sba_driver); 1990 } 1991 1992 1993 /** 1994 * sba_get_iommu - Assign the iommu pointer for the pci bus controller. 1995 * @dev: The parisc device. 1996 * 1997 * Returns the appropriate IOMMU data for the given parisc PCI controller. 1998 * This is cached and used later for PCI DMA Mapping. 1999 */ 2000 void * sba_get_iommu(struct parisc_device *pci_hba) 2001 { 2002 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2003 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2004 char t = sba_dev->id.hw_type; 2005 int iocnum = (pci_hba->hw_path >> 3); /* rope # */ 2006 2007 WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT)); 2008 2009 return &(sba->ioc[iocnum]); 2010 } 2011 2012 2013 /** 2014 * sba_directed_lmmio - return first directed LMMIO range routed to rope 2015 * @pa_dev: The parisc device. 2016 * @r: resource PCI host controller wants start/end fields assigned. 2017 * 2018 * For the given parisc PCI controller, determine if any direct ranges 2019 * are routed down the corresponding rope. 2020 */ 2021 void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r) 2022 { 2023 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2024 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2025 char t = sba_dev->id.hw_type; 2026 int i; 2027 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2028 2029 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2030 2031 r->start = r->end = 0; 2032 2033 /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */ 2034 for (i=0; i<4; i++) { 2035 int base, size; 2036 void __iomem *reg = sba->sba_hpa + i*0x18; 2037 2038 base = READ_REG32(reg + LMMIO_DIRECT0_BASE); 2039 if ((base & 1) == 0) 2040 continue; /* not enabled */ 2041 2042 size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE); 2043 2044 if ((size & (ROPES_PER_IOC-1)) != rope) 2045 continue; /* directed down different rope */ 2046 2047 r->start = (base & ~1UL) | PCI_F_EXTEND; 2048 size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK); 2049 r->end = r->start + size; 2050 r->flags = IORESOURCE_MEM; 2051 } 2052 } 2053 2054 2055 /** 2056 * sba_distributed_lmmio - return portion of distributed LMMIO range 2057 * @pa_dev: The parisc device. 2058 * @r: resource PCI host controller wants start/end fields assigned. 2059 * 2060 * For the given parisc PCI controller, return portion of distributed LMMIO 2061 * range. The distributed LMMIO is always present and it's just a question 2062 * of the base address and size of the range. 2063 */ 2064 void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r ) 2065 { 2066 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2067 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2068 char t = sba_dev->id.hw_type; 2069 int base, size; 2070 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2071 2072 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2073 2074 r->start = r->end = 0; 2075 2076 base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE); 2077 if ((base & 1) == 0) { 2078 BUG(); /* Gah! Distr Range wasn't enabled! */ 2079 return; 2080 } 2081 2082 r->start = (base & ~1UL) | PCI_F_EXTEND; 2083 2084 size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC; 2085 r->start += rope * (size + 1); /* adjust base for this rope */ 2086 r->end = r->start + size; 2087 r->flags = IORESOURCE_MEM; 2088 } 2089