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 DEFAULT_DMA_HINT_REG 0 99 100 struct sba_device *sba_list; 101 EXPORT_SYMBOL_GPL(sba_list); 102 103 static unsigned long ioc_needs_fdc = 0; 104 105 /* global count of IOMMUs in the system */ 106 static unsigned int global_ioc_cnt = 0; 107 108 /* PA8700 (Piranha 2.2) bug workaround */ 109 static unsigned long piranha_bad_128k = 0; 110 111 /* Looks nice and keeps the compiler happy */ 112 #define SBA_DEV(d) ((struct sba_device *) (d)) 113 114 #ifdef CONFIG_AGP_PARISC 115 #define SBA_AGP_SUPPORT 116 #endif /*CONFIG_AGP_PARISC*/ 117 118 #ifdef SBA_AGP_SUPPORT 119 static int sba_reserve_agpgart = 1; 120 module_param(sba_reserve_agpgart, int, 0444); 121 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART"); 122 #endif 123 124 125 /************************************ 126 ** SBA register read and write support 127 ** 128 ** BE WARNED: register writes are posted. 129 ** (ie follow writes which must reach HW with a read) 130 ** 131 ** Superdome (in particular, REO) allows only 64-bit CSR accesses. 132 */ 133 #define READ_REG32(addr) readl(addr) 134 #define READ_REG64(addr) readq(addr) 135 #define WRITE_REG32(val, addr) writel((val), (addr)) 136 #define WRITE_REG64(val, addr) writeq((val), (addr)) 137 138 #ifdef CONFIG_64BIT 139 #define READ_REG(addr) READ_REG64(addr) 140 #define WRITE_REG(value, addr) WRITE_REG64(value, addr) 141 #else 142 #define READ_REG(addr) READ_REG32(addr) 143 #define WRITE_REG(value, addr) WRITE_REG32(value, addr) 144 #endif 145 146 #ifdef DEBUG_SBA_INIT 147 148 /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */ 149 150 /** 151 * sba_dump_ranges - debugging only - print ranges assigned to this IOA 152 * @hpa: base address of the sba 153 * 154 * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO 155 * IO Adapter (aka Bus Converter). 156 */ 157 static void 158 sba_dump_ranges(void __iomem *hpa) 159 { 160 DBG_INIT("SBA at 0x%p\n", hpa); 161 DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE)); 162 DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK)); 163 DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE)); 164 DBG_INIT("\n"); 165 DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE)); 166 DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK)); 167 DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE)); 168 } 169 170 /** 171 * sba_dump_tlb - debugging only - print IOMMU operating parameters 172 * @hpa: base address of the IOMMU 173 * 174 * Print the size/location of the IO MMU PDIR. 175 */ 176 static void sba_dump_tlb(void __iomem *hpa) 177 { 178 DBG_INIT("IO TLB at 0x%p\n", hpa); 179 DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE)); 180 DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK)); 181 DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG)); 182 DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE)); 183 DBG_INIT("\n"); 184 } 185 #else 186 #define sba_dump_ranges(x) 187 #define sba_dump_tlb(x) 188 #endif /* DEBUG_SBA_INIT */ 189 190 191 #ifdef ASSERT_PDIR_SANITY 192 193 /** 194 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry 195 * @ioc: IO MMU structure which owns the pdir we are interested in. 196 * @msg: text to print ont the output line. 197 * @pide: pdir index. 198 * 199 * Print one entry of the IO MMU PDIR in human readable form. 200 */ 201 static void 202 sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide) 203 { 204 /* start printing from lowest pde in rval */ 205 u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]); 206 unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]); 207 uint rcnt; 208 209 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n", 210 msg, 211 rptr, pide & (BITS_PER_LONG - 1), *rptr); 212 213 rcnt = 0; 214 while (rcnt < BITS_PER_LONG) { 215 printk(KERN_DEBUG "%s %2d %p %016Lx\n", 216 (rcnt == (pide & (BITS_PER_LONG - 1))) 217 ? " -->" : " ", 218 rcnt, ptr, *ptr ); 219 rcnt++; 220 ptr++; 221 } 222 printk(KERN_DEBUG "%s", msg); 223 } 224 225 226 /** 227 * sba_check_pdir - debugging only - consistency checker 228 * @ioc: IO MMU structure which owns the pdir we are interested in. 229 * @msg: text to print ont the output line. 230 * 231 * Verify the resource map and pdir state is consistent 232 */ 233 static int 234 sba_check_pdir(struct ioc *ioc, char *msg) 235 { 236 u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]); 237 u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */ 238 u64 *pptr = ioc->pdir_base; /* pdir ptr */ 239 uint pide = 0; 240 241 while (rptr < rptr_end) { 242 u32 rval = *rptr; 243 int rcnt = 32; /* number of bits we might check */ 244 245 while (rcnt) { 246 /* Get last byte and highest bit from that */ 247 u32 pde = ((u32) (((char *)pptr)[7])) << 24; 248 if ((rval ^ pde) & 0x80000000) 249 { 250 /* 251 ** BUMMER! -- res_map != pdir -- 252 ** Dump rval and matching pdir entries 253 */ 254 sba_dump_pdir_entry(ioc, msg, pide); 255 return(1); 256 } 257 rcnt--; 258 rval <<= 1; /* try the next bit */ 259 pptr++; 260 pide++; 261 } 262 rptr++; /* look at next word of res_map */ 263 } 264 /* It'd be nice if we always got here :^) */ 265 return 0; 266 } 267 268 269 /** 270 * sba_dump_sg - debugging only - print Scatter-Gather list 271 * @ioc: IO MMU structure which owns the pdir we are interested in. 272 * @startsg: head of the SG list 273 * @nents: number of entries in SG list 274 * 275 * print the SG list so we can verify it's correct by hand. 276 */ 277 static void 278 sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents) 279 { 280 while (nents-- > 0) { 281 printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n", 282 nents, 283 (unsigned long) sg_dma_address(startsg), 284 sg_dma_len(startsg), 285 sg_virt(startsg), startsg->length); 286 startsg++; 287 } 288 } 289 290 #endif /* ASSERT_PDIR_SANITY */ 291 292 293 294 295 /************************************************************** 296 * 297 * I/O Pdir Resource Management 298 * 299 * Bits set in the resource map are in use. 300 * Each bit can represent a number of pages. 301 * LSbs represent lower addresses (IOVA's). 302 * 303 ***************************************************************/ 304 #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */ 305 306 /* Convert from IOVP to IOVA and vice versa. */ 307 308 #ifdef ZX1_SUPPORT 309 /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */ 310 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset)) 311 #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask) 312 #else 313 /* only support Astro and ancestors. Saves a few cycles in key places */ 314 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset)) 315 #define SBA_IOVP(ioc,iova) (iova) 316 #endif 317 318 #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT) 319 320 #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n))) 321 #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1) 322 323 static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr, 324 unsigned int bitshiftcnt) 325 { 326 return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3) 327 + bitshiftcnt; 328 } 329 330 /** 331 * sba_search_bitmap - find free space in IO PDIR resource bitmap 332 * @ioc: IO MMU structure which owns the pdir we are interested in. 333 * @dev: device to query the bitmap for 334 * @bits_wanted: number of entries we need. 335 * 336 * Find consecutive free bits in resource bitmap. 337 * Each bit represents one entry in the IO Pdir. 338 * Cool perf optimization: search for log2(size) bits at a time. 339 */ 340 static unsigned long 341 sba_search_bitmap(struct ioc *ioc, struct device *dev, 342 unsigned long bits_wanted) 343 { 344 unsigned long *res_ptr = ioc->res_hint; 345 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]); 346 unsigned long pide = ~0UL, tpide; 347 unsigned long boundary_size; 348 unsigned long shift; 349 int ret; 350 351 boundary_size = dma_get_seg_boundary_nr_pages(dev, IOVP_SHIFT); 352 353 #if defined(ZX1_SUPPORT) 354 BUG_ON(ioc->ibase & ~IOVP_MASK); 355 shift = ioc->ibase >> IOVP_SHIFT; 356 #else 357 shift = 0; 358 #endif 359 360 if (bits_wanted > (BITS_PER_LONG/2)) { 361 /* Search word at a time - no mask needed */ 362 for(; res_ptr < res_end; ++res_ptr) { 363 tpide = ptr_to_pide(ioc, res_ptr, 0); 364 ret = iommu_is_span_boundary(tpide, bits_wanted, 365 shift, 366 boundary_size); 367 if ((*res_ptr == 0) && !ret) { 368 *res_ptr = RESMAP_MASK(bits_wanted); 369 pide = tpide; 370 break; 371 } 372 } 373 /* point to the next word on next pass */ 374 res_ptr++; 375 ioc->res_bitshift = 0; 376 } else { 377 /* 378 ** Search the resource bit map on well-aligned values. 379 ** "o" is the alignment. 380 ** We need the alignment to invalidate I/O TLB using 381 ** SBA HW features in the unmap path. 382 */ 383 unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT); 384 uint bitshiftcnt = ALIGN(ioc->res_bitshift, o); 385 unsigned long mask; 386 387 if (bitshiftcnt >= BITS_PER_LONG) { 388 bitshiftcnt = 0; 389 res_ptr++; 390 } 391 mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt; 392 393 DBG_RES("%s() o %ld %p", __func__, o, res_ptr); 394 while(res_ptr < res_end) 395 { 396 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr); 397 WARN_ON(mask == 0); 398 tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt); 399 ret = iommu_is_span_boundary(tpide, bits_wanted, 400 shift, 401 boundary_size); 402 if ((((*res_ptr) & mask) == 0) && !ret) { 403 *res_ptr |= mask; /* mark resources busy! */ 404 pide = tpide; 405 break; 406 } 407 mask >>= o; 408 bitshiftcnt += o; 409 if (mask == 0) { 410 mask = RESMAP_MASK(bits_wanted); 411 bitshiftcnt=0; 412 res_ptr++; 413 } 414 } 415 /* look in the same word on the next pass */ 416 ioc->res_bitshift = bitshiftcnt + bits_wanted; 417 } 418 419 /* wrapped ? */ 420 if (res_end <= res_ptr) { 421 ioc->res_hint = (unsigned long *) ioc->res_map; 422 ioc->res_bitshift = 0; 423 } else { 424 ioc->res_hint = res_ptr; 425 } 426 return (pide); 427 } 428 429 430 /** 431 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap 432 * @ioc: IO MMU structure which owns the pdir we are interested in. 433 * @dev: device for which pages should be alloced 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 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 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 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 * @attrs: attributes 797 * 798 * See Documentation/core-api/dma-api-howto.rst 799 */ 800 static void 801 sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size, 802 enum dma_data_direction direction, unsigned long attrs) 803 { 804 struct ioc *ioc; 805 #if DELAYED_RESOURCE_CNT > 0 806 struct sba_dma_pair *d; 807 #endif 808 unsigned long flags; 809 dma_addr_t offset; 810 811 DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size); 812 813 ioc = GET_IOC(dev); 814 if (!ioc) { 815 WARN_ON(!ioc); 816 return; 817 } 818 offset = iova & ~IOVP_MASK; 819 iova ^= offset; /* clear offset bits */ 820 size += offset; 821 size = ALIGN(size, IOVP_SIZE); 822 823 spin_lock_irqsave(&ioc->res_lock, flags); 824 825 #ifdef SBA_COLLECT_STATS 826 ioc->usingle_calls++; 827 ioc->usingle_pages += size >> IOVP_SHIFT; 828 #endif 829 830 sba_mark_invalid(ioc, iova, size); 831 832 #if DELAYED_RESOURCE_CNT > 0 833 /* Delaying when we re-use a IO Pdir entry reduces the number 834 * of MMIO reads needed to flush writes to the PCOM register. 835 */ 836 d = &(ioc->saved[ioc->saved_cnt]); 837 d->iova = iova; 838 d->size = size; 839 if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) { 840 int cnt = ioc->saved_cnt; 841 while (cnt--) { 842 sba_free_range(ioc, d->iova, d->size); 843 d--; 844 } 845 ioc->saved_cnt = 0; 846 847 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 848 } 849 #else /* DELAYED_RESOURCE_CNT == 0 */ 850 sba_free_range(ioc, iova, size); 851 852 /* If fdc's were issued, force fdc's to be visible now */ 853 asm_io_sync(); 854 855 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ 856 #endif /* DELAYED_RESOURCE_CNT == 0 */ 857 858 spin_unlock_irqrestore(&ioc->res_lock, flags); 859 860 /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support. 861 ** For Astro based systems this isn't a big deal WRT performance. 862 ** As long as 2.4 kernels copyin/copyout data from/to userspace, 863 ** we don't need the syncdma. The issue here is I/O MMU cachelines 864 ** are *not* coherent in all cases. May be hwrev dependent. 865 ** Need to investigate more. 866 asm volatile("syncdma"); 867 */ 868 } 869 870 871 /** 872 * sba_alloc - allocate/map shared mem for DMA 873 * @hwdev: instance of PCI owned by the driver that's asking. 874 * @size: number of bytes mapped in driver buffer. 875 * @dma_handle: IOVA of new buffer. 876 * @gfp: allocation flags 877 * @attrs: attributes 878 * 879 * See Documentation/core-api/dma-api-howto.rst 880 */ 881 static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle, 882 gfp_t gfp, unsigned long attrs) 883 { 884 void *ret; 885 886 if (!hwdev) { 887 /* only support PCI */ 888 *dma_handle = 0; 889 return NULL; 890 } 891 892 ret = (void *) __get_free_pages(gfp, get_order(size)); 893 894 if (ret) { 895 memset(ret, 0, size); 896 *dma_handle = sba_map_single(hwdev, ret, size, 0); 897 } 898 899 return ret; 900 } 901 902 903 /** 904 * sba_free - free/unmap shared mem for DMA 905 * @hwdev: instance of PCI owned by the driver that's asking. 906 * @size: number of bytes mapped in driver buffer. 907 * @vaddr: virtual address IOVA of "consistent" buffer. 908 * @dma_handle: IO virtual address of "consistent" buffer. 909 * @attrs: attributes 910 * 911 * See Documentation/core-api/dma-api-howto.rst 912 */ 913 static void 914 sba_free(struct device *hwdev, size_t size, void *vaddr, 915 dma_addr_t dma_handle, unsigned long attrs) 916 { 917 sba_unmap_page(hwdev, dma_handle, size, 0, 0); 918 free_pages((unsigned long) vaddr, get_order(size)); 919 } 920 921 922 /* 923 ** Since 0 is a valid pdir_base index value, can't use that 924 ** to determine if a value is valid or not. Use a flag to indicate 925 ** the SG list entry contains a valid pdir index. 926 */ 927 #define PIDE_FLAG 0x80000000UL 928 929 #ifdef SBA_COLLECT_STATS 930 #define IOMMU_MAP_STATS 931 #endif 932 #include "iommu-helpers.h" 933 934 #ifdef DEBUG_LARGE_SG_ENTRIES 935 int dump_run_sg = 0; 936 #endif 937 938 939 /** 940 * sba_map_sg - map Scatter/Gather list 941 * @dev: instance of PCI owned by the driver that's asking. 942 * @sglist: array of buffer/length pairs 943 * @nents: number of entries in list 944 * @direction: R/W or both. 945 * @attrs: attributes 946 * 947 * See Documentation/core-api/dma-api-howto.rst 948 */ 949 static int 950 sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, 951 enum dma_data_direction direction, unsigned long attrs) 952 { 953 struct ioc *ioc; 954 int filled = 0; 955 unsigned long flags; 956 957 DBG_RUN_SG("%s() START %d entries\n", __func__, nents); 958 959 ioc = GET_IOC(dev); 960 if (!ioc) 961 return -EINVAL; 962 963 /* Fast path single entry scatterlists. */ 964 if (nents == 1) { 965 sg_dma_address(sglist) = sba_map_single(dev, sg_virt(sglist), 966 sglist->length, direction); 967 sg_dma_len(sglist) = sglist->length; 968 return 1; 969 } 970 971 spin_lock_irqsave(&ioc->res_lock, flags); 972 973 #ifdef ASSERT_PDIR_SANITY 974 if (sba_check_pdir(ioc,"Check before sba_map_sg()")) 975 { 976 sba_dump_sg(ioc, sglist, nents); 977 panic("Check before sba_map_sg()"); 978 } 979 #endif 980 981 #ifdef SBA_COLLECT_STATS 982 ioc->msg_calls++; 983 #endif 984 985 /* 986 ** First coalesce the chunks and allocate I/O pdir space 987 ** 988 ** If this is one DMA stream, we can properly map using the 989 ** correct virtual address associated with each DMA page. 990 ** w/o this association, we wouldn't have coherent DMA! 991 ** Access to the virtual address is what forces a two pass algorithm. 992 */ 993 iommu_coalesce_chunks(ioc, dev, sglist, nents, sba_alloc_range); 994 995 /* 996 ** Program the I/O Pdir 997 ** 998 ** map the virtual addresses to the I/O Pdir 999 ** o dma_address will contain the pdir index 1000 ** o dma_len will contain the number of bytes to map 1001 ** o address contains the virtual address. 1002 */ 1003 filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry); 1004 1005 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ 1006 asm_io_sync(); 1007 1008 #ifdef ASSERT_PDIR_SANITY 1009 if (sba_check_pdir(ioc,"Check after sba_map_sg()")) 1010 { 1011 sba_dump_sg(ioc, sglist, nents); 1012 panic("Check after sba_map_sg()\n"); 1013 } 1014 #endif 1015 1016 spin_unlock_irqrestore(&ioc->res_lock, flags); 1017 1018 DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled); 1019 1020 return filled; 1021 } 1022 1023 1024 /** 1025 * sba_unmap_sg - unmap Scatter/Gather list 1026 * @dev: instance of PCI owned by the driver that's asking. 1027 * @sglist: array of buffer/length pairs 1028 * @nents: number of entries in list 1029 * @direction: R/W or both. 1030 * @attrs: attributes 1031 * 1032 * See Documentation/core-api/dma-api-howto.rst 1033 */ 1034 static void 1035 sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, 1036 enum dma_data_direction direction, unsigned long attrs) 1037 { 1038 struct ioc *ioc; 1039 #ifdef ASSERT_PDIR_SANITY 1040 unsigned long flags; 1041 #endif 1042 1043 DBG_RUN_SG("%s() START %d entries, %p,%x\n", 1044 __func__, nents, sg_virt(sglist), sglist->length); 1045 1046 ioc = GET_IOC(dev); 1047 if (!ioc) { 1048 WARN_ON(!ioc); 1049 return; 1050 } 1051 1052 #ifdef SBA_COLLECT_STATS 1053 ioc->usg_calls++; 1054 #endif 1055 1056 #ifdef ASSERT_PDIR_SANITY 1057 spin_lock_irqsave(&ioc->res_lock, flags); 1058 sba_check_pdir(ioc,"Check before sba_unmap_sg()"); 1059 spin_unlock_irqrestore(&ioc->res_lock, flags); 1060 #endif 1061 1062 while (nents && sg_dma_len(sglist)) { 1063 1064 sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist), 1065 direction, 0); 1066 #ifdef SBA_COLLECT_STATS 1067 ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT; 1068 ioc->usingle_calls--; /* kluge since call is unmap_sg() */ 1069 #endif 1070 ++sglist; 1071 nents--; 1072 } 1073 1074 DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents); 1075 1076 #ifdef ASSERT_PDIR_SANITY 1077 spin_lock_irqsave(&ioc->res_lock, flags); 1078 sba_check_pdir(ioc,"Check after sba_unmap_sg()"); 1079 spin_unlock_irqrestore(&ioc->res_lock, flags); 1080 #endif 1081 1082 } 1083 1084 static const struct dma_map_ops sba_ops = { 1085 .dma_supported = sba_dma_supported, 1086 .alloc = sba_alloc, 1087 .free = sba_free, 1088 .map_page = sba_map_page, 1089 .unmap_page = sba_unmap_page, 1090 .map_sg = sba_map_sg, 1091 .unmap_sg = sba_unmap_sg, 1092 .get_sgtable = dma_common_get_sgtable, 1093 .alloc_pages = dma_common_alloc_pages, 1094 .free_pages = dma_common_free_pages, 1095 }; 1096 1097 1098 /************************************************************************** 1099 ** 1100 ** SBA PAT PDC support 1101 ** 1102 ** o call pdc_pat_cell_module() 1103 ** o store ranges in PCI "resource" structures 1104 ** 1105 **************************************************************************/ 1106 1107 static void 1108 sba_get_pat_resources(struct sba_device *sba_dev) 1109 { 1110 #if 0 1111 /* 1112 ** TODO/REVISIT/FIXME: support for directed ranges requires calls to 1113 ** PAT PDC to program the SBA/LBA directed range registers...this 1114 ** burden may fall on the LBA code since it directly supports the 1115 ** PCI subsystem. It's not clear yet. - ggg 1116 */ 1117 PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp); 1118 FIXME : ??? 1119 PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp); 1120 Tells where the dvi bits are located in the address. 1121 PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp); 1122 FIXME : ??? 1123 #endif 1124 } 1125 1126 1127 /************************************************************** 1128 * 1129 * Initialization and claim 1130 * 1131 ***************************************************************/ 1132 #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */ 1133 #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */ 1134 static void * 1135 sba_alloc_pdir(unsigned int pdir_size) 1136 { 1137 unsigned long pdir_base; 1138 unsigned long pdir_order = get_order(pdir_size); 1139 1140 pdir_base = __get_free_pages(GFP_KERNEL, pdir_order); 1141 if (NULL == (void *) pdir_base) { 1142 panic("%s() could not allocate I/O Page Table\n", 1143 __func__); 1144 } 1145 1146 /* If this is not PA8700 (PCX-W2) 1147 ** OR newer than ver 2.2 1148 ** OR in a system that doesn't need VINDEX bits from SBA, 1149 ** 1150 ** then we aren't exposed to the HW bug. 1151 */ 1152 if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13 1153 || (boot_cpu_data.pdc.versions > 0x202) 1154 || (boot_cpu_data.pdc.capabilities & 0x08L) ) 1155 return (void *) pdir_base; 1156 1157 /* 1158 * PA8700 (PCX-W2, aka piranha) silent data corruption fix 1159 * 1160 * An interaction between PA8700 CPU (Ver 2.2 or older) and 1161 * Ike/Astro can cause silent data corruption. This is only 1162 * a problem if the I/O PDIR is located in memory such that 1163 * (little-endian) bits 17 and 18 are on and bit 20 is off. 1164 * 1165 * Since the max IO Pdir size is 2MB, by cleverly allocating the 1166 * right physical address, we can either avoid (IOPDIR <= 1MB) 1167 * or minimize (2MB IO Pdir) the problem if we restrict the 1168 * IO Pdir to a maximum size of 2MB-128K (1902K). 1169 * 1170 * Because we always allocate 2^N sized IO pdirs, either of the 1171 * "bad" regions will be the last 128K if at all. That's easy 1172 * to test for. 1173 * 1174 */ 1175 if (pdir_order <= (19-12)) { 1176 if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) { 1177 /* allocate a new one on 512k alignment */ 1178 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12)); 1179 /* release original */ 1180 free_pages(pdir_base, pdir_order); 1181 1182 pdir_base = new_pdir; 1183 1184 /* release excess */ 1185 while (pdir_order < (19-12)) { 1186 new_pdir += pdir_size; 1187 free_pages(new_pdir, pdir_order); 1188 pdir_order +=1; 1189 pdir_size <<=1; 1190 } 1191 } 1192 } else { 1193 /* 1194 ** 1MB or 2MB Pdir 1195 ** Needs to be aligned on an "odd" 1MB boundary. 1196 */ 1197 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */ 1198 1199 /* release original */ 1200 free_pages( pdir_base, pdir_order); 1201 1202 /* release first 1MB */ 1203 free_pages(new_pdir, 20-12); 1204 1205 pdir_base = new_pdir + 1024*1024; 1206 1207 if (pdir_order > (20-12)) { 1208 /* 1209 ** 2MB Pdir. 1210 ** 1211 ** Flag tells init_bitmap() to mark bad 128k as used 1212 ** and to reduce the size by 128k. 1213 */ 1214 piranha_bad_128k = 1; 1215 1216 new_pdir += 3*1024*1024; 1217 /* release last 1MB */ 1218 free_pages(new_pdir, 20-12); 1219 1220 /* release unusable 128KB */ 1221 free_pages(new_pdir - 128*1024 , 17-12); 1222 1223 pdir_size -= 128*1024; 1224 } 1225 } 1226 1227 memset((void *) pdir_base, 0, pdir_size); 1228 return (void *) pdir_base; 1229 } 1230 1231 struct ibase_data_struct { 1232 struct ioc *ioc; 1233 int ioc_num; 1234 }; 1235 1236 static int setup_ibase_imask_callback(struct device *dev, void *data) 1237 { 1238 struct parisc_device *lba = to_parisc_device(dev); 1239 struct ibase_data_struct *ibd = data; 1240 int rope_num = (lba->hpa.start >> 13) & 0xf; 1241 if (rope_num >> 3 == ibd->ioc_num) 1242 lba_set_iregs(lba, ibd->ioc->ibase, ibd->ioc->imask); 1243 return 0; 1244 } 1245 1246 /* setup Mercury or Elroy IBASE/IMASK registers. */ 1247 static void 1248 setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1249 { 1250 struct ibase_data_struct ibase_data = { 1251 .ioc = ioc, 1252 .ioc_num = ioc_num, 1253 }; 1254 1255 device_for_each_child(&sba->dev, &ibase_data, 1256 setup_ibase_imask_callback); 1257 } 1258 1259 #ifdef SBA_AGP_SUPPORT 1260 static int 1261 sba_ioc_find_quicksilver(struct device *dev, void *data) 1262 { 1263 int *agp_found = data; 1264 struct parisc_device *lba = to_parisc_device(dev); 1265 1266 if (IS_QUICKSILVER(lba)) 1267 *agp_found = 1; 1268 return 0; 1269 } 1270 #endif 1271 1272 static void 1273 sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1274 { 1275 u32 iova_space_mask; 1276 u32 iova_space_size; 1277 int iov_order, tcnfg; 1278 #ifdef SBA_AGP_SUPPORT 1279 int agp_found = 0; 1280 #endif 1281 /* 1282 ** Firmware programs the base and size of a "safe IOVA space" 1283 ** (one that doesn't overlap memory or LMMIO space) in the 1284 ** IBASE and IMASK registers. 1285 */ 1286 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE) & ~0x1fffffULL; 1287 iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; 1288 1289 if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) { 1290 printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n"); 1291 iova_space_size /= 2; 1292 } 1293 1294 /* 1295 ** iov_order is always based on a 1GB IOVA space since we want to 1296 ** turn on the other half for AGP GART. 1297 */ 1298 iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT)); 1299 ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64); 1300 1301 DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n", 1302 __func__, ioc->ioc_hpa, iova_space_size >> 20, 1303 iov_order + PAGE_SHIFT); 1304 1305 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL, 1306 get_order(ioc->pdir_size)); 1307 if (!ioc->pdir_base) 1308 panic("Couldn't allocate I/O Page Table\n"); 1309 1310 memset(ioc->pdir_base, 0, ioc->pdir_size); 1311 1312 DBG_INIT("%s() pdir %p size %x\n", 1313 __func__, ioc->pdir_base, ioc->pdir_size); 1314 1315 #ifdef SBA_HINT_SUPPORT 1316 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1317 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1318 1319 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1320 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1321 #endif 1322 1323 WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base); 1324 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1325 1326 /* build IMASK for IOC and Elroy */ 1327 iova_space_mask = 0xffffffff; 1328 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1329 ioc->imask = iova_space_mask; 1330 #ifdef ZX1_SUPPORT 1331 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1332 #endif 1333 sba_dump_tlb(ioc->ioc_hpa); 1334 1335 setup_ibase_imask(sba, ioc, ioc_num); 1336 1337 WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK); 1338 1339 #ifdef CONFIG_64BIT 1340 /* 1341 ** Setting the upper bits makes checking for bypass addresses 1342 ** a little faster later on. 1343 */ 1344 ioc->imask |= 0xFFFFFFFF00000000UL; 1345 #endif 1346 1347 /* Set I/O PDIR Page size to system page size */ 1348 switch (PAGE_SHIFT) { 1349 case 12: tcnfg = 0; break; /* 4K */ 1350 case 13: tcnfg = 1; break; /* 8K */ 1351 case 14: tcnfg = 2; break; /* 16K */ 1352 case 16: tcnfg = 3; break; /* 64K */ 1353 default: 1354 panic(__FILE__ "Unsupported system page size %d", 1355 1 << PAGE_SHIFT); 1356 break; 1357 } 1358 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG); 1359 1360 /* 1361 ** Program the IOC's ibase and enable IOVA translation 1362 ** Bit zero == enable bit. 1363 */ 1364 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE); 1365 1366 /* 1367 ** Clear I/O TLB of any possible entries. 1368 ** (Yes. This is a bit paranoid...but so what) 1369 */ 1370 WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM); 1371 1372 #ifdef SBA_AGP_SUPPORT 1373 1374 /* 1375 ** If an AGP device is present, only use half of the IOV space 1376 ** for PCI DMA. Unfortunately we can't know ahead of time 1377 ** whether GART support will actually be used, for now we 1378 ** can just key on any AGP device found in the system. 1379 ** We program the next pdir index after we stop w/ a key for 1380 ** the GART code to handshake on. 1381 */ 1382 device_for_each_child(&sba->dev, &agp_found, sba_ioc_find_quicksilver); 1383 1384 if (agp_found && sba_reserve_agpgart) { 1385 printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n", 1386 __func__, (iova_space_size/2) >> 20); 1387 ioc->pdir_size /= 2; 1388 ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE; 1389 } 1390 #endif /*SBA_AGP_SUPPORT*/ 1391 } 1392 1393 static void 1394 sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num) 1395 { 1396 u32 iova_space_size, iova_space_mask; 1397 unsigned int pdir_size, iov_order, tcnfg; 1398 1399 /* 1400 ** Determine IOVA Space size from memory size. 1401 ** 1402 ** Ideally, PCI drivers would register the maximum number 1403 ** of DMA they can have outstanding for each device they 1404 ** own. Next best thing would be to guess how much DMA 1405 ** can be outstanding based on PCI Class/sub-class. Both 1406 ** methods still require some "extra" to support PCI 1407 ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). 1408 ** 1409 ** While we have 32-bits "IOVA" space, top two 2 bits are used 1410 ** for DMA hints - ergo only 30 bits max. 1411 */ 1412 1413 iova_space_size = (u32) (totalram_pages()/global_ioc_cnt); 1414 1415 /* limit IOVA space size to 1MB-1GB */ 1416 if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { 1417 iova_space_size = 1 << (20 - PAGE_SHIFT); 1418 } 1419 else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) { 1420 iova_space_size = 1 << (30 - PAGE_SHIFT); 1421 } 1422 1423 /* 1424 ** iova space must be log2() in size. 1425 ** thus, pdir/res_map will also be log2(). 1426 ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced) 1427 */ 1428 iov_order = get_order(iova_space_size << PAGE_SHIFT); 1429 1430 /* iova_space_size is now bytes, not pages */ 1431 iova_space_size = 1 << (iov_order + PAGE_SHIFT); 1432 1433 ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64); 1434 1435 DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n", 1436 __func__, 1437 ioc->ioc_hpa, 1438 (unsigned long) totalram_pages() >> (20 - PAGE_SHIFT), 1439 iova_space_size>>20, 1440 iov_order + PAGE_SHIFT); 1441 1442 ioc->pdir_base = sba_alloc_pdir(pdir_size); 1443 1444 DBG_INIT("%s() pdir %p size %x\n", 1445 __func__, ioc->pdir_base, pdir_size); 1446 1447 #ifdef SBA_HINT_SUPPORT 1448 /* FIXME : DMA HINTs not used */ 1449 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; 1450 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); 1451 1452 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", 1453 ioc->hint_shift_pdir, ioc->hint_mask_pdir); 1454 #endif 1455 1456 WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); 1457 1458 /* build IMASK for IOC and Elroy */ 1459 iova_space_mask = 0xffffffff; 1460 iova_space_mask <<= (iov_order + PAGE_SHIFT); 1461 1462 /* 1463 ** On C3000 w/512MB mem, HP-UX 10.20 reports: 1464 ** ibase=0, imask=0xFE000000, size=0x2000000. 1465 */ 1466 ioc->ibase = 0; 1467 ioc->imask = iova_space_mask; /* save it */ 1468 #ifdef ZX1_SUPPORT 1469 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); 1470 #endif 1471 1472 DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n", 1473 __func__, ioc->ibase, ioc->imask); 1474 1475 /* 1476 ** FIXME: Hint registers are programmed with default hint 1477 ** values during boot, so hints should be sane even if we 1478 ** can't reprogram them the way drivers want. 1479 */ 1480 1481 setup_ibase_imask(sba, ioc, ioc_num); 1482 1483 /* 1484 ** Program the IOC's ibase and enable IOVA translation 1485 */ 1486 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE); 1487 WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK); 1488 1489 /* Set I/O PDIR Page size to system page size */ 1490 switch (PAGE_SHIFT) { 1491 case 12: tcnfg = 0; break; /* 4K */ 1492 case 13: tcnfg = 1; break; /* 8K */ 1493 case 14: tcnfg = 2; break; /* 16K */ 1494 case 16: tcnfg = 3; break; /* 64K */ 1495 default: 1496 panic(__FILE__ "Unsupported system page size %d", 1497 1 << PAGE_SHIFT); 1498 break; 1499 } 1500 /* Set I/O PDIR Page size to PAGE_SIZE (4k/16k/...) */ 1501 WRITE_REG(tcnfg, ioc->ioc_hpa+IOC_TCNFG); 1502 1503 /* 1504 ** Clear I/O TLB of any possible entries. 1505 ** (Yes. This is a bit paranoid...but so what) 1506 */ 1507 WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM); 1508 1509 ioc->ibase = 0; /* used by SBA_IOVA and related macros */ 1510 1511 DBG_INIT("%s() DONE\n", __func__); 1512 } 1513 1514 1515 1516 /************************************************************************** 1517 ** 1518 ** SBA initialization code (HW and SW) 1519 ** 1520 ** o identify SBA chip itself 1521 ** o initialize SBA chip modes (HardFail) 1522 ** o initialize SBA chip modes (HardFail) 1523 ** o FIXME: initialize DMA hints for reasonable defaults 1524 ** 1525 **************************************************************************/ 1526 1527 static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset) 1528 { 1529 return ioremap(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE); 1530 } 1531 1532 static void sba_hw_init(struct sba_device *sba_dev) 1533 { 1534 int i; 1535 int num_ioc; 1536 u64 ioc_ctl; 1537 1538 if (!is_pdc_pat()) { 1539 /* Shutdown the USB controller on Astro-based workstations. 1540 ** Once we reprogram the IOMMU, the next DMA performed by 1541 ** USB will HPMC the box. USB is only enabled if a 1542 ** keyboard is present and found. 1543 ** 1544 ** With serial console, j6k v5.0 firmware says: 1545 ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7 1546 ** 1547 ** FIXME: Using GFX+USB console at power up but direct 1548 ** linux to serial console is still broken. 1549 ** USB could generate DMA so we must reset USB. 1550 ** The proper sequence would be: 1551 ** o block console output 1552 ** o reset USB device 1553 ** o reprogram serial port 1554 ** o unblock console output 1555 */ 1556 if (PAGE0->mem_kbd.cl_class == CL_KEYBD) { 1557 pdc_io_reset_devices(); 1558 } 1559 1560 } 1561 1562 1563 #if 0 1564 printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa, 1565 PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class); 1566 1567 /* 1568 ** Need to deal with DMA from LAN. 1569 ** Maybe use page zero boot device as a handle to talk 1570 ** to PDC about which device to shutdown. 1571 ** 1572 ** Netbooting, j6k v5.0 firmware says: 1573 ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002 1574 ** ARGH! invalid class. 1575 */ 1576 if ((PAGE0->mem_boot.cl_class != CL_RANDOM) 1577 && (PAGE0->mem_boot.cl_class != CL_SEQU)) { 1578 pdc_io_reset(); 1579 } 1580 #endif 1581 1582 if (!IS_PLUTO(sba_dev->dev)) { 1583 ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL); 1584 DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->", 1585 __func__, sba_dev->sba_hpa, ioc_ctl); 1586 ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE); 1587 ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC; 1588 /* j6700 v1.6 firmware sets 0x294f */ 1589 /* A500 firmware sets 0x4d */ 1590 1591 WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL); 1592 1593 #ifdef DEBUG_SBA_INIT 1594 ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL); 1595 DBG_INIT(" 0x%Lx\n", ioc_ctl); 1596 #endif 1597 } /* if !PLUTO */ 1598 1599 if (IS_ASTRO(sba_dev->dev)) { 1600 int err; 1601 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET); 1602 num_ioc = 1; 1603 1604 sba_dev->chip_resv.name = "Astro Intr Ack"; 1605 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL; 1606 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ; 1607 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1608 BUG_ON(err < 0); 1609 1610 } else if (IS_PLUTO(sba_dev->dev)) { 1611 int err; 1612 1613 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET); 1614 num_ioc = 1; 1615 1616 sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA"; 1617 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL; 1618 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1); 1619 err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); 1620 WARN_ON(err < 0); 1621 1622 sba_dev->iommu_resv.name = "IOVA Space"; 1623 sba_dev->iommu_resv.start = 0x40000000UL; 1624 sba_dev->iommu_resv.end = 0x50000000UL - 1; 1625 err = request_resource(&iomem_resource, &(sba_dev->iommu_resv)); 1626 WARN_ON(err < 0); 1627 } else { 1628 /* IKE, REO */ 1629 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0)); 1630 sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1)); 1631 num_ioc = 2; 1632 1633 /* TODO - LOOKUP Ike/Stretch chipset mem map */ 1634 } 1635 /* XXX: What about Reo Grande? */ 1636 1637 sba_dev->num_ioc = num_ioc; 1638 for (i = 0; i < num_ioc; i++) { 1639 void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa; 1640 unsigned int j; 1641 1642 for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) { 1643 1644 /* 1645 * Clear ROPE(N)_CONFIG AO bit. 1646 * Disables "NT Ordering" (~= !"Relaxed Ordering") 1647 * Overrides bit 1 in DMA Hint Sets. 1648 * Improves netperf UDP_STREAM by ~10% for bcm5701. 1649 */ 1650 if (IS_PLUTO(sba_dev->dev)) { 1651 void __iomem *rope_cfg; 1652 unsigned long cfg_val; 1653 1654 rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j; 1655 cfg_val = READ_REG(rope_cfg); 1656 cfg_val &= ~IOC_ROPE_AO; 1657 WRITE_REG(cfg_val, rope_cfg); 1658 } 1659 1660 /* 1661 ** Make sure the box crashes on rope errors. 1662 */ 1663 WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j); 1664 } 1665 1666 /* flush out the last writes */ 1667 READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); 1668 1669 DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n", 1670 i, 1671 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40), 1672 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50) 1673 ); 1674 DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n", 1675 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108), 1676 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400) 1677 ); 1678 1679 if (IS_PLUTO(sba_dev->dev)) { 1680 sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i); 1681 } else { 1682 sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i); 1683 } 1684 } 1685 } 1686 1687 static void 1688 sba_common_init(struct sba_device *sba_dev) 1689 { 1690 int i; 1691 1692 /* add this one to the head of the list (order doesn't matter) 1693 ** This will be useful for debugging - especially if we get coredumps 1694 */ 1695 sba_dev->next = sba_list; 1696 sba_list = sba_dev; 1697 1698 for(i=0; i< sba_dev->num_ioc; i++) { 1699 int res_size; 1700 #ifdef DEBUG_DMB_TRAP 1701 extern void iterate_pages(unsigned long , unsigned long , 1702 void (*)(pte_t * , unsigned long), 1703 unsigned long ); 1704 void set_data_memory_break(pte_t * , unsigned long); 1705 #endif 1706 /* resource map size dictated by pdir_size */ 1707 res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */ 1708 1709 /* Second part of PIRANHA BUG */ 1710 if (piranha_bad_128k) { 1711 res_size -= (128*1024)/sizeof(u64); 1712 } 1713 1714 res_size >>= 3; /* convert bit count to byte count */ 1715 DBG_INIT("%s() res_size 0x%x\n", 1716 __func__, res_size); 1717 1718 sba_dev->ioc[i].res_size = res_size; 1719 sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size)); 1720 1721 #ifdef DEBUG_DMB_TRAP 1722 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1723 set_data_memory_break, 0); 1724 #endif 1725 1726 if (NULL == sba_dev->ioc[i].res_map) 1727 { 1728 panic("%s:%s() could not allocate resource map\n", 1729 __FILE__, __func__ ); 1730 } 1731 1732 memset(sba_dev->ioc[i].res_map, 0, res_size); 1733 /* next available IOVP - circular search */ 1734 sba_dev->ioc[i].res_hint = (unsigned long *) 1735 &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]); 1736 1737 #ifdef ASSERT_PDIR_SANITY 1738 /* Mark first bit busy - ie no IOVA 0 */ 1739 sba_dev->ioc[i].res_map[0] = 0x80; 1740 sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL; 1741 #endif 1742 1743 /* Third (and last) part of PIRANHA BUG */ 1744 if (piranha_bad_128k) { 1745 /* region from +1408K to +1536 is un-usable. */ 1746 1747 int idx_start = (1408*1024/sizeof(u64)) >> 3; 1748 int idx_end = (1536*1024/sizeof(u64)) >> 3; 1749 long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]); 1750 long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]); 1751 1752 /* mark that part of the io pdir busy */ 1753 while (p_start < p_end) 1754 *p_start++ = -1; 1755 1756 } 1757 1758 #ifdef DEBUG_DMB_TRAP 1759 iterate_pages( sba_dev->ioc[i].res_map, res_size, 1760 set_data_memory_break, 0); 1761 iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size, 1762 set_data_memory_break, 0); 1763 #endif 1764 1765 DBG_INIT("%s() %d res_map %x %p\n", 1766 __func__, i, res_size, sba_dev->ioc[i].res_map); 1767 } 1768 1769 spin_lock_init(&sba_dev->sba_lock); 1770 ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC; 1771 1772 #ifdef DEBUG_SBA_INIT 1773 /* 1774 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set 1775 * (bit #61, big endian), we have to flush and sync every time 1776 * IO-PDIR is changed in Ike/Astro. 1777 */ 1778 if (ioc_needs_fdc) { 1779 printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n"); 1780 } else { 1781 printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n"); 1782 } 1783 #endif 1784 } 1785 1786 #ifdef CONFIG_PROC_FS 1787 static int sba_proc_info(struct seq_file *m, void *p) 1788 { 1789 struct sba_device *sba_dev = sba_list; 1790 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1791 int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */ 1792 #ifdef SBA_COLLECT_STATS 1793 unsigned long avg = 0, min, max; 1794 #endif 1795 int i; 1796 1797 seq_printf(m, "%s rev %d.%d\n", 1798 sba_dev->name, 1799 (sba_dev->hw_rev & 0x7) + 1, 1800 (sba_dev->hw_rev & 0x18) >> 3); 1801 seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", 1802 (int)((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */ 1803 total_pages); 1804 1805 seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", 1806 ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */ 1807 1808 seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n", 1809 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE), 1810 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK), 1811 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)); 1812 1813 for (i=0; i<4; i++) 1814 seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", 1815 i, 1816 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18), 1817 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18), 1818 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)); 1819 1820 #ifdef SBA_COLLECT_STATS 1821 seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", 1822 total_pages - ioc->used_pages, ioc->used_pages, 1823 (int)(ioc->used_pages * 100 / total_pages)); 1824 1825 min = max = ioc->avg_search[0]; 1826 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) { 1827 avg += ioc->avg_search[i]; 1828 if (ioc->avg_search[i] > max) max = ioc->avg_search[i]; 1829 if (ioc->avg_search[i] < min) min = ioc->avg_search[i]; 1830 } 1831 avg /= SBA_SEARCH_SAMPLE; 1832 seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", 1833 min, avg, max); 1834 1835 seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n", 1836 ioc->msingle_calls, ioc->msingle_pages, 1837 (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls)); 1838 1839 /* KLUGE - unmap_sg calls unmap_single for each mapped page */ 1840 min = ioc->usingle_calls; 1841 max = ioc->usingle_pages - ioc->usg_pages; 1842 seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n", 1843 min, max, (int)((max * 1000)/min)); 1844 1845 seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1846 ioc->msg_calls, ioc->msg_pages, 1847 (int)((ioc->msg_pages * 1000)/ioc->msg_calls)); 1848 1849 seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n", 1850 ioc->usg_calls, ioc->usg_pages, 1851 (int)((ioc->usg_pages * 1000)/ioc->usg_calls)); 1852 #endif 1853 1854 return 0; 1855 } 1856 1857 static int 1858 sba_proc_bitmap_info(struct seq_file *m, void *p) 1859 { 1860 struct sba_device *sba_dev = sba_list; 1861 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ 1862 1863 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, ioc->res_map, 1864 ioc->res_size, false); 1865 seq_putc(m, '\n'); 1866 1867 return 0; 1868 } 1869 #endif /* CONFIG_PROC_FS */ 1870 1871 static const struct parisc_device_id sba_tbl[] __initconst = { 1872 { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb }, 1873 { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc }, 1874 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc }, 1875 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc }, 1876 { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc }, 1877 { 0, } 1878 }; 1879 1880 static int sba_driver_callback(struct parisc_device *); 1881 1882 static struct parisc_driver sba_driver __refdata = { 1883 .name = MODULE_NAME, 1884 .id_table = sba_tbl, 1885 .probe = sba_driver_callback, 1886 }; 1887 1888 /* 1889 ** Determine if sba should claim this chip (return 0) or not (return 1). 1890 ** If so, initialize the chip and tell other partners in crime they 1891 ** have work to do. 1892 */ 1893 static int __init sba_driver_callback(struct parisc_device *dev) 1894 { 1895 struct sba_device *sba_dev; 1896 u32 func_class; 1897 int i; 1898 char *version; 1899 void __iomem *sba_addr = ioremap(dev->hpa.start, SBA_FUNC_SIZE); 1900 #ifdef CONFIG_PROC_FS 1901 struct proc_dir_entry *root; 1902 #endif 1903 1904 sba_dump_ranges(sba_addr); 1905 1906 /* Read HW Rev First */ 1907 func_class = READ_REG(sba_addr + SBA_FCLASS); 1908 1909 if (IS_ASTRO(dev)) { 1910 unsigned long fclass; 1911 static char astro_rev[]="Astro ?.?"; 1912 1913 /* Astro is broken...Read HW Rev First */ 1914 fclass = READ_REG(sba_addr); 1915 1916 astro_rev[6] = '1' + (char) (fclass & 0x7); 1917 astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3); 1918 version = astro_rev; 1919 1920 } else if (IS_IKE(dev)) { 1921 static char ike_rev[] = "Ike rev ?"; 1922 ike_rev[8] = '0' + (char) (func_class & 0xff); 1923 version = ike_rev; 1924 } else if (IS_PLUTO(dev)) { 1925 static char pluto_rev[]="Pluto ?.?"; 1926 pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4); 1927 pluto_rev[8] = '0' + (char) (func_class & 0x0f); 1928 version = pluto_rev; 1929 } else { 1930 static char reo_rev[] = "REO rev ?"; 1931 reo_rev[8] = '0' + (char) (func_class & 0xff); 1932 version = reo_rev; 1933 } 1934 1935 if (!global_ioc_cnt) { 1936 global_ioc_cnt = count_parisc_driver(&sba_driver); 1937 1938 /* Astro and Pluto have one IOC per SBA */ 1939 if ((!IS_ASTRO(dev)) || (!IS_PLUTO(dev))) 1940 global_ioc_cnt *= 2; 1941 } 1942 1943 printk(KERN_INFO "%s found %s at 0x%llx\n", 1944 MODULE_NAME, version, (unsigned long long)dev->hpa.start); 1945 1946 sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL); 1947 if (!sba_dev) { 1948 printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n"); 1949 return -ENOMEM; 1950 } 1951 1952 parisc_set_drvdata(dev, sba_dev); 1953 1954 for(i=0; i<MAX_IOC; i++) 1955 spin_lock_init(&(sba_dev->ioc[i].res_lock)); 1956 1957 sba_dev->dev = dev; 1958 sba_dev->hw_rev = func_class; 1959 sba_dev->name = dev->name; 1960 sba_dev->sba_hpa = sba_addr; 1961 1962 sba_get_pat_resources(sba_dev); 1963 sba_hw_init(sba_dev); 1964 sba_common_init(sba_dev); 1965 1966 hppa_dma_ops = &sba_ops; 1967 1968 #ifdef CONFIG_PROC_FS 1969 switch (dev->id.hversion) { 1970 case PLUTO_MCKINLEY_PORT: 1971 root = proc_mckinley_root; 1972 break; 1973 case ASTRO_RUNWAY_PORT: 1974 case IKE_MERCED_PORT: 1975 default: 1976 root = proc_runway_root; 1977 break; 1978 } 1979 1980 proc_create_single("sba_iommu", 0, root, sba_proc_info); 1981 proc_create_single("sba_iommu-bitmap", 0, root, sba_proc_bitmap_info); 1982 #endif 1983 return 0; 1984 } 1985 1986 /* 1987 ** One time initialization to let the world know the SBA was found. 1988 ** This is the only routine which is NOT static. 1989 ** Must be called exactly once before pci_init(). 1990 */ 1991 void __init sba_init(void) 1992 { 1993 register_parisc_driver(&sba_driver); 1994 } 1995 1996 1997 /** 1998 * sba_get_iommu - Assign the iommu pointer for the pci bus controller. 1999 * @pci_hba: The parisc device. 2000 * 2001 * Returns the appropriate IOMMU data for the given parisc PCI controller. 2002 * This is cached and used later for PCI DMA Mapping. 2003 */ 2004 void * sba_get_iommu(struct parisc_device *pci_hba) 2005 { 2006 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2007 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2008 char t = sba_dev->id.hw_type; 2009 int iocnum = (pci_hba->hw_path >> 3); /* rope # */ 2010 2011 WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT)); 2012 2013 return &(sba->ioc[iocnum]); 2014 } 2015 2016 2017 /** 2018 * sba_directed_lmmio - return first directed LMMIO range routed to rope 2019 * @pci_hba: The parisc device. 2020 * @r: resource PCI host controller wants start/end fields assigned. 2021 * 2022 * For the given parisc PCI controller, determine if any direct ranges 2023 * are routed down the corresponding rope. 2024 */ 2025 void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r) 2026 { 2027 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2028 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2029 char t = sba_dev->id.hw_type; 2030 int i; 2031 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2032 2033 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2034 2035 r->start = r->end = 0; 2036 2037 /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */ 2038 for (i=0; i<4; i++) { 2039 int base, size; 2040 void __iomem *reg = sba->sba_hpa + i*0x18; 2041 2042 base = READ_REG32(reg + LMMIO_DIRECT0_BASE); 2043 if ((base & 1) == 0) 2044 continue; /* not enabled */ 2045 2046 size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE); 2047 2048 if ((size & (ROPES_PER_IOC-1)) != rope) 2049 continue; /* directed down different rope */ 2050 2051 r->start = (base & ~1UL) | PCI_F_EXTEND; 2052 size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK); 2053 r->end = r->start + size; 2054 r->flags = IORESOURCE_MEM; 2055 } 2056 } 2057 2058 2059 /** 2060 * sba_distributed_lmmio - return portion of distributed LMMIO range 2061 * @pci_hba: The parisc device. 2062 * @r: resource PCI host controller wants start/end fields assigned. 2063 * 2064 * For the given parisc PCI controller, return portion of distributed LMMIO 2065 * range. The distributed LMMIO is always present and it's just a question 2066 * of the base address and size of the range. 2067 */ 2068 void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r ) 2069 { 2070 struct parisc_device *sba_dev = parisc_parent(pci_hba); 2071 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev); 2072 char t = sba_dev->id.hw_type; 2073 int base, size; 2074 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ 2075 2076 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); 2077 2078 r->start = r->end = 0; 2079 2080 base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE); 2081 if ((base & 1) == 0) { 2082 BUG(); /* Gah! Distr Range wasn't enabled! */ 2083 return; 2084 } 2085 2086 r->start = (base & ~1UL) | PCI_F_EXTEND; 2087 2088 size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC; 2089 r->start += rope * (size + 1); /* adjust base for this rope */ 2090 r->end = r->start + size; 2091 r->flags = IORESOURCE_MEM; 2092 } 2093