1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * linux/arch/alpha/kernel/core_marvel.c 4 * 5 * Code common to all Marvel based systems. 6 */ 7 8 #define __EXTERN_INLINE inline 9 #include <asm/io.h> 10 #include <asm/core_marvel.h> 11 #undef __EXTERN_INLINE 12 13 #include <linux/types.h> 14 #include <linux/pci.h> 15 #include <linux/sched.h> 16 #include <linux/init.h> 17 #include <linux/vmalloc.h> 18 #include <linux/mc146818rtc.h> 19 #include <linux/rtc.h> 20 #include <linux/module.h> 21 #include <linux/memblock.h> 22 23 #include <asm/ptrace.h> 24 #include <asm/smp.h> 25 #include <asm/gct.h> 26 #include <asm/tlbflush.h> 27 #include <asm/vga.h> 28 29 #include "proto.h" 30 #include "pci_impl.h" 31 32 33 /* 34 * Debug helpers 35 */ 36 #define DEBUG_CONFIG 0 37 38 #if DEBUG_CONFIG 39 # define DBG_CFG(args) printk args 40 #else 41 # define DBG_CFG(args) 42 #endif 43 44 45 /* 46 * Private data 47 */ 48 static struct io7 *io7_head = NULL; 49 50 51 /* 52 * Helper functions 53 */ 54 static unsigned long __attribute__ ((unused)) 55 read_ev7_csr(int pe, unsigned long offset) 56 { 57 ev7_csr *ev7csr = EV7_CSR_KERN(pe, offset); 58 unsigned long q; 59 60 mb(); 61 q = ev7csr->csr; 62 mb(); 63 64 return q; 65 } 66 67 static void __attribute__ ((unused)) 68 write_ev7_csr(int pe, unsigned long offset, unsigned long q) 69 { 70 ev7_csr *ev7csr = EV7_CSR_KERN(pe, offset); 71 72 mb(); 73 ev7csr->csr = q; 74 mb(); 75 } 76 77 static char * __init 78 mk_resource_name(int pe, int port, char *str) 79 { 80 char tmp[80]; 81 char *name; 82 83 sprintf(tmp, "PCI %s PE %d PORT %d", str, pe, port); 84 name = memblock_alloc(strlen(tmp) + 1, SMP_CACHE_BYTES); 85 if (!name) 86 panic("%s: Failed to allocate %zu bytes\n", __func__, 87 strlen(tmp) + 1); 88 strcpy(name, tmp); 89 90 return name; 91 } 92 93 inline struct io7 * 94 marvel_next_io7(struct io7 *prev) 95 { 96 return (prev ? prev->next : io7_head); 97 } 98 99 struct io7 * 100 marvel_find_io7(int pe) 101 { 102 struct io7 *io7; 103 104 for (io7 = io7_head; io7 && io7->pe != pe; io7 = io7->next) 105 continue; 106 107 return io7; 108 } 109 110 static struct io7 * __init 111 alloc_io7(unsigned int pe) 112 { 113 struct io7 *io7; 114 struct io7 *insp; 115 int h; 116 117 if (marvel_find_io7(pe)) { 118 printk(KERN_WARNING "IO7 at PE %d already allocated!\n", pe); 119 return NULL; 120 } 121 122 io7 = memblock_alloc(sizeof(*io7), SMP_CACHE_BYTES); 123 if (!io7) 124 panic("%s: Failed to allocate %zu bytes\n", __func__, 125 sizeof(*io7)); 126 io7->pe = pe; 127 raw_spin_lock_init(&io7->irq_lock); 128 129 for (h = 0; h < 4; h++) { 130 io7->ports[h].io7 = io7; 131 io7->ports[h].port = h; 132 io7->ports[h].enabled = 0; /* default to disabled */ 133 } 134 135 /* 136 * Insert in pe sorted order. 137 */ 138 if (NULL == io7_head) /* empty list */ 139 io7_head = io7; 140 else if (io7_head->pe > io7->pe) { /* insert at head */ 141 io7->next = io7_head; 142 io7_head = io7; 143 } else { /* insert at position */ 144 for (insp = io7_head; insp; insp = insp->next) { 145 if (insp->pe == io7->pe) { 146 printk(KERN_ERR "Too many IO7s at PE %d\n", 147 io7->pe); 148 return NULL; 149 } 150 151 if (NULL == insp->next || 152 insp->next->pe > io7->pe) { /* insert here */ 153 io7->next = insp->next; 154 insp->next = io7; 155 break; 156 } 157 } 158 159 if (NULL == insp) { /* couldn't insert ?!? */ 160 printk(KERN_WARNING "Failed to insert IO7 at PE %d " 161 " - adding at head of list\n", io7->pe); 162 io7->next = io7_head; 163 io7_head = io7; 164 } 165 } 166 167 return io7; 168 } 169 170 void 171 io7_clear_errors(struct io7 *io7) 172 { 173 io7_port7_csrs *p7csrs; 174 io7_ioport_csrs *csrs; 175 int port; 176 177 178 /* 179 * First the IO ports. 180 */ 181 for (port = 0; port < 4; port++) { 182 csrs = IO7_CSRS_KERN(io7->pe, port); 183 184 csrs->POx_ERR_SUM.csr = -1UL; 185 csrs->POx_TLB_ERR.csr = -1UL; 186 csrs->POx_SPL_COMPLT.csr = -1UL; 187 csrs->POx_TRANS_SUM.csr = -1UL; 188 } 189 190 /* 191 * Then the common ones. 192 */ 193 p7csrs = IO7_PORT7_CSRS_KERN(io7->pe); 194 195 p7csrs->PO7_ERROR_SUM.csr = -1UL; 196 p7csrs->PO7_UNCRR_SYM.csr = -1UL; 197 p7csrs->PO7_CRRCT_SYM.csr = -1UL; 198 } 199 200 201 /* 202 * IO7 PCI, PCI/X, AGP configuration. 203 */ 204 static void __init 205 io7_init_hose(struct io7 *io7, int port) 206 { 207 static int hose_index = 0; 208 209 struct pci_controller *hose = alloc_pci_controller(); 210 struct io7_port *io7_port = &io7->ports[port]; 211 io7_ioport_csrs *csrs = IO7_CSRS_KERN(io7->pe, port); 212 int i; 213 214 hose->index = hose_index++; /* arbitrary */ 215 216 /* 217 * We don't have an isa or legacy hose, but glibc expects to be 218 * able to use the bus == 0 / dev == 0 form of the iobase syscall 219 * to determine information about the i/o system. Since XFree86 220 * relies on glibc's determination to tell whether or not to use 221 * sparse access, we need to point the pci_isa_hose at a real hose 222 * so at least that determination is correct. 223 */ 224 if (hose->index == 0) 225 pci_isa_hose = hose; 226 227 io7_port->csrs = csrs; 228 io7_port->hose = hose; 229 hose->sysdata = io7_port; 230 231 hose->io_space = alloc_resource(); 232 hose->mem_space = alloc_resource(); 233 234 /* 235 * Base addresses for userland consumption. Since these are going 236 * to be mapped, they are pure physical addresses. 237 */ 238 hose->sparse_mem_base = hose->sparse_io_base = 0; 239 hose->dense_mem_base = IO7_MEM_PHYS(io7->pe, port); 240 hose->dense_io_base = IO7_IO_PHYS(io7->pe, port); 241 242 /* 243 * Base addresses and resource ranges for kernel consumption. 244 */ 245 hose->config_space_base = (unsigned long)IO7_CONF_KERN(io7->pe, port); 246 247 hose->io_space->start = (unsigned long)IO7_IO_KERN(io7->pe, port); 248 hose->io_space->end = hose->io_space->start + IO7_IO_SPACE - 1; 249 hose->io_space->name = mk_resource_name(io7->pe, port, "IO"); 250 hose->io_space->flags = IORESOURCE_IO; 251 252 hose->mem_space->start = (unsigned long)IO7_MEM_KERN(io7->pe, port); 253 hose->mem_space->end = hose->mem_space->start + IO7_MEM_SPACE - 1; 254 hose->mem_space->name = mk_resource_name(io7->pe, port, "MEM"); 255 hose->mem_space->flags = IORESOURCE_MEM; 256 257 if (request_resource(&ioport_resource, hose->io_space) < 0) 258 printk(KERN_ERR "Failed to request IO on hose %d\n", 259 hose->index); 260 if (request_resource(&iomem_resource, hose->mem_space) < 0) 261 printk(KERN_ERR "Failed to request MEM on hose %d\n", 262 hose->index); 263 264 /* 265 * Save the existing DMA window settings for later restoration. 266 */ 267 for (i = 0; i < 4; i++) { 268 io7_port->saved_wbase[i] = csrs->POx_WBASE[i].csr; 269 io7_port->saved_wmask[i] = csrs->POx_WMASK[i].csr; 270 io7_port->saved_tbase[i] = csrs->POx_TBASE[i].csr; 271 } 272 273 /* 274 * Set up the PCI to main memory translation windows. 275 * 276 * Window 0 is scatter-gather 8MB at 8MB 277 * Window 1 is direct access 1GB at 2GB 278 * Window 2 is scatter-gather (up-to) 1GB at 3GB 279 * Window 3 is disabled 280 */ 281 282 /* 283 * TBIA before modifying windows. 284 */ 285 marvel_pci_tbi(hose, 0, -1); 286 287 /* 288 * Set up window 0 for scatter-gather 8MB at 8MB. 289 */ 290 hose->sg_isa = iommu_arena_new_node(0, hose, 0x00800000, 0x00800000, 0); 291 hose->sg_isa->align_entry = 8; /* cache line boundary */ 292 csrs->POx_WBASE[0].csr = 293 hose->sg_isa->dma_base | wbase_m_ena | wbase_m_sg; 294 csrs->POx_WMASK[0].csr = (hose->sg_isa->size - 1) & wbase_m_addr; 295 csrs->POx_TBASE[0].csr = virt_to_phys(hose->sg_isa->ptes); 296 297 /* 298 * Set up window 1 for direct-mapped 1GB at 2GB. 299 */ 300 csrs->POx_WBASE[1].csr = __direct_map_base | wbase_m_ena; 301 csrs->POx_WMASK[1].csr = (__direct_map_size - 1) & wbase_m_addr; 302 csrs->POx_TBASE[1].csr = 0; 303 304 /* 305 * Set up window 2 for scatter-gather (up-to) 1GB at 3GB. 306 */ 307 hose->sg_pci = iommu_arena_new_node(0, hose, 0xc0000000, 0x40000000, 0); 308 hose->sg_pci->align_entry = 8; /* cache line boundary */ 309 csrs->POx_WBASE[2].csr = 310 hose->sg_pci->dma_base | wbase_m_ena | wbase_m_sg; 311 csrs->POx_WMASK[2].csr = (hose->sg_pci->size - 1) & wbase_m_addr; 312 csrs->POx_TBASE[2].csr = virt_to_phys(hose->sg_pci->ptes); 313 314 /* 315 * Disable window 3. 316 */ 317 csrs->POx_WBASE[3].csr = 0; 318 319 /* 320 * Make sure that the AGP Monster Window is disabled. 321 */ 322 csrs->POx_CTRL.csr &= ~(1UL << 61); 323 324 #if 1 325 printk("FIXME: disabling master aborts\n"); 326 csrs->POx_MSK_HEI.csr &= ~(3UL << 14); 327 #endif 328 /* 329 * TBIA after modifying windows. 330 */ 331 marvel_pci_tbi(hose, 0, -1); 332 } 333 334 static void __init 335 marvel_init_io7(struct io7 *io7) 336 { 337 int i; 338 339 printk("Initializing IO7 at PID %d\n", io7->pe); 340 341 /* 342 * Get the Port 7 CSR pointer. 343 */ 344 io7->csrs = IO7_PORT7_CSRS_KERN(io7->pe); 345 346 /* 347 * Init this IO7's hoses. 348 */ 349 for (i = 0; i < IO7_NUM_PORTS; i++) { 350 io7_ioport_csrs *csrs = IO7_CSRS_KERN(io7->pe, i); 351 if (csrs->POx_CACHE_CTL.csr == 8) { 352 io7->ports[i].enabled = 1; 353 io7_init_hose(io7, i); 354 } 355 } 356 } 357 358 void __init 359 marvel_io7_present(gct6_node *node) 360 { 361 int pe; 362 363 if (node->type != GCT_TYPE_HOSE || 364 node->subtype != GCT_SUBTYPE_IO_PORT_MODULE) 365 return; 366 367 pe = (node->id >> 8) & 0xff; 368 printk("Found an IO7 at PID %d\n", pe); 369 370 alloc_io7(pe); 371 } 372 373 static void __init 374 marvel_find_console_vga_hose(void) 375 { 376 #ifdef CONFIG_VGA_HOSE 377 u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset); 378 379 if (pu64[7] == 3) { /* TERM_TYPE == graphics */ 380 struct pci_controller *hose = NULL; 381 int h = (pu64[30] >> 24) & 0xff; /* TERM_OUT_LOC, hose # */ 382 struct io7 *io7; 383 int pid, port; 384 385 /* FIXME - encoding is going to have to change for Marvel 386 * since hose will be able to overflow a byte... 387 * need to fix this decode when the console 388 * changes its encoding 389 */ 390 printk("console graphics is on hose %d (console)\n", h); 391 392 /* 393 * The console's hose numbering is: 394 * 395 * hose<n:2>: PID 396 * hose<1:0>: PORT 397 * 398 * We need to find the hose at that pid and port 399 */ 400 pid = h >> 2; 401 port = h & 3; 402 if ((io7 = marvel_find_io7(pid))) 403 hose = io7->ports[port].hose; 404 405 if (hose) { 406 printk("Console graphics on hose %d\n", hose->index); 407 pci_vga_hose = hose; 408 } 409 } 410 #endif 411 } 412 413 gct6_search_struct gct_wanted_node_list[] __initdata = { 414 { GCT_TYPE_HOSE, GCT_SUBTYPE_IO_PORT_MODULE, marvel_io7_present }, 415 { 0, 0, NULL } 416 }; 417 418 /* 419 * In case the GCT is not complete, let the user specify PIDs with IO7s 420 * at boot time. Syntax is 'io7=a,b,c,...,n' where a-n are the PIDs (decimal) 421 * where IO7s are connected 422 */ 423 static int __init 424 marvel_specify_io7(char *str) 425 { 426 unsigned long pid; 427 struct io7 *io7; 428 char *pchar; 429 430 do { 431 pid = simple_strtoul(str, &pchar, 0); 432 if (pchar != str) { 433 printk("User-specified IO7 at PID %lu\n", pid); 434 io7 = alloc_io7(pid); 435 if (io7) marvel_init_io7(io7); 436 } 437 438 if (pchar == str) pchar++; 439 str = pchar; 440 } while(*str); 441 442 return 1; 443 } 444 __setup("io7=", marvel_specify_io7); 445 446 void __init 447 marvel_init_arch(void) 448 { 449 struct io7 *io7; 450 451 /* With multiple PCI busses, we play with I/O as physical addrs. */ 452 ioport_resource.end = ~0UL; 453 454 /* PCI DMA Direct Mapping is 1GB at 2GB. */ 455 __direct_map_base = 0x80000000; 456 __direct_map_size = 0x40000000; 457 458 /* Parse the config tree. */ 459 gct6_find_nodes(GCT_NODE_PTR(0), gct_wanted_node_list); 460 461 /* Init the io7s. */ 462 for (io7 = NULL; NULL != (io7 = marvel_next_io7(io7)); ) 463 marvel_init_io7(io7); 464 465 /* Check for graphic console location (if any). */ 466 marvel_find_console_vga_hose(); 467 } 468 469 void 470 marvel_kill_arch(int mode) 471 { 472 } 473 474 475 /* 476 * PCI Configuration Space access functions 477 * 478 * Configuration space addresses have the following format: 479 * 480 * |2 2 2 2|1 1 1 1|1 1 1 1|1 1 481 * |3 2 1 0|9 8 7 6|5 4 3 2|1 0 9 8|7 6 5 4|3 2 1 0 482 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 483 * |B|B|B|B|B|B|B|B|D|D|D|D|D|F|F|F|R|R|R|R|R|R|R|R| 484 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 485 * 486 * n:24 reserved for hose base 487 * 23:16 bus number (8 bits = 128 possible buses) 488 * 15:11 Device number (5 bits) 489 * 10:8 function number 490 * 7:2 register number 491 * 492 * Notes: 493 * IO7 determines whether to use a type 0 or type 1 config cycle 494 * based on the bus number. Therefore the bus number must be set 495 * to 0 for the root bus on any hose. 496 * 497 * The function number selects which function of a multi-function device 498 * (e.g., SCSI and Ethernet). 499 * 500 */ 501 502 static inline unsigned long 503 build_conf_addr(struct pci_controller *hose, u8 bus, 504 unsigned int devfn, int where) 505 { 506 return (hose->config_space_base | (bus << 16) | (devfn << 8) | where); 507 } 508 509 static unsigned long 510 mk_conf_addr(struct pci_bus *pbus, unsigned int devfn, int where) 511 { 512 struct pci_controller *hose = pbus->sysdata; 513 struct io7_port *io7_port; 514 unsigned long addr = 0; 515 u8 bus = pbus->number; 516 517 if (!hose) 518 return addr; 519 520 /* Check for enabled. */ 521 io7_port = hose->sysdata; 522 if (!io7_port->enabled) 523 return addr; 524 525 if (!pbus->parent) { /* No parent means peer PCI bus. */ 526 /* Don't support idsel > 20 on primary bus. */ 527 if (devfn >= PCI_DEVFN(21, 0)) 528 return addr; 529 bus = 0; 530 } 531 532 addr = build_conf_addr(hose, bus, devfn, where); 533 534 DBG_CFG(("mk_conf_addr: returning pci_addr 0x%lx\n", addr)); 535 return addr; 536 } 537 538 static int 539 marvel_read_config(struct pci_bus *bus, unsigned int devfn, int where, 540 int size, u32 *value) 541 { 542 unsigned long addr; 543 544 if (0 == (addr = mk_conf_addr(bus, devfn, where))) 545 return PCIBIOS_DEVICE_NOT_FOUND; 546 547 switch(size) { 548 case 1: 549 *value = __kernel_ldbu(*(vucp)addr); 550 break; 551 case 2: 552 *value = __kernel_ldwu(*(vusp)addr); 553 break; 554 case 4: 555 *value = *(vuip)addr; 556 break; 557 default: 558 return PCIBIOS_FUNC_NOT_SUPPORTED; 559 } 560 561 return PCIBIOS_SUCCESSFUL; 562 } 563 564 static int 565 marvel_write_config(struct pci_bus *bus, unsigned int devfn, int where, 566 int size, u32 value) 567 { 568 unsigned long addr; 569 570 if (0 == (addr = mk_conf_addr(bus, devfn, where))) 571 return PCIBIOS_DEVICE_NOT_FOUND; 572 573 switch (size) { 574 case 1: 575 __kernel_stb(value, *(vucp)addr); 576 mb(); 577 __kernel_ldbu(*(vucp)addr); 578 break; 579 case 2: 580 __kernel_stw(value, *(vusp)addr); 581 mb(); 582 __kernel_ldwu(*(vusp)addr); 583 break; 584 case 4: 585 *(vuip)addr = value; 586 mb(); 587 *(vuip)addr; 588 break; 589 default: 590 return PCIBIOS_FUNC_NOT_SUPPORTED; 591 } 592 593 return PCIBIOS_SUCCESSFUL; 594 } 595 596 struct pci_ops marvel_pci_ops = 597 { 598 .read = marvel_read_config, 599 .write = marvel_write_config, 600 }; 601 602 603 /* 604 * Other PCI helper functions. 605 */ 606 void 607 marvel_pci_tbi(struct pci_controller *hose, dma_addr_t start, dma_addr_t end) 608 { 609 io7_ioport_csrs *csrs = ((struct io7_port *)hose->sysdata)->csrs; 610 611 wmb(); 612 csrs->POx_SG_TBIA.csr = 0; 613 mb(); 614 csrs->POx_SG_TBIA.csr; 615 } 616 617 618 619 /* 620 * RTC Support 621 */ 622 struct marvel_rtc_access_info { 623 unsigned long function; 624 unsigned long index; 625 unsigned long data; 626 }; 627 628 static void 629 __marvel_access_rtc(void *info) 630 { 631 struct marvel_rtc_access_info *rtc_access = info; 632 633 register unsigned long __r0 __asm__("$0"); 634 register unsigned long __r16 __asm__("$16") = rtc_access->function; 635 register unsigned long __r17 __asm__("$17") = rtc_access->index; 636 register unsigned long __r18 __asm__("$18") = rtc_access->data; 637 638 __asm__ __volatile__( 639 "call_pal %4 # cserve rtc" 640 : "=r"(__r16), "=r"(__r17), "=r"(__r18), "=r"(__r0) 641 : "i"(PAL_cserve), "0"(__r16), "1"(__r17), "2"(__r18) 642 : "$1", "$22", "$23", "$24", "$25"); 643 644 rtc_access->data = __r0; 645 } 646 647 static u8 648 __marvel_rtc_io(u8 b, unsigned long addr, int write) 649 { 650 static u8 index = 0; 651 652 struct marvel_rtc_access_info rtc_access; 653 u8 ret = 0; 654 655 switch(addr) { 656 case 0x70: /* RTC_PORT(0) */ 657 if (write) index = b; 658 ret = index; 659 break; 660 661 case 0x71: /* RTC_PORT(1) */ 662 rtc_access.index = index; 663 rtc_access.data = bcd2bin(b); 664 rtc_access.function = 0x48 + !write; /* GET/PUT_TOY */ 665 666 __marvel_access_rtc(&rtc_access); 667 668 ret = bin2bcd(rtc_access.data); 669 break; 670 671 default: 672 printk(KERN_WARNING "Illegal RTC port %lx\n", addr); 673 break; 674 } 675 676 return ret; 677 } 678 679 680 /* 681 * IO map support. 682 */ 683 void __iomem * 684 marvel_ioremap(unsigned long addr, unsigned long size) 685 { 686 struct pci_controller *hose; 687 unsigned long baddr, last; 688 struct vm_struct *area; 689 unsigned long vaddr; 690 unsigned long *ptes; 691 unsigned long pfn; 692 693 /* 694 * Adjust the address. 695 */ 696 FIXUP_MEMADDR_VGA(addr); 697 698 /* 699 * Find the hose. 700 */ 701 for (hose = hose_head; hose; hose = hose->next) { 702 if ((addr >> 32) == (hose->mem_space->start >> 32)) 703 break; 704 } 705 if (!hose) 706 return NULL; 707 708 /* 709 * We have the hose - calculate the bus limits. 710 */ 711 baddr = addr - hose->mem_space->start; 712 last = baddr + size - 1; 713 714 /* 715 * Is it direct-mapped? 716 */ 717 if ((baddr >= __direct_map_base) && 718 ((baddr + size - 1) < __direct_map_base + __direct_map_size)) { 719 addr = IDENT_ADDR | (baddr - __direct_map_base); 720 return (void __iomem *) addr; 721 } 722 723 /* 724 * Check the scatter-gather arena. 725 */ 726 if (hose->sg_pci && 727 baddr >= (unsigned long)hose->sg_pci->dma_base && 728 last < (unsigned long)hose->sg_pci->dma_base + hose->sg_pci->size) { 729 730 /* 731 * Adjust the limits (mappings must be page aligned) 732 */ 733 baddr -= hose->sg_pci->dma_base; 734 last -= hose->sg_pci->dma_base; 735 baddr &= PAGE_MASK; 736 size = PAGE_ALIGN(last) - baddr; 737 738 /* 739 * Map it. 740 */ 741 area = get_vm_area(size, VM_IOREMAP); 742 if (!area) 743 return NULL; 744 745 ptes = hose->sg_pci->ptes; 746 for (vaddr = (unsigned long)area->addr; 747 baddr <= last; 748 baddr += PAGE_SIZE, vaddr += PAGE_SIZE) { 749 pfn = ptes[baddr >> PAGE_SHIFT]; 750 if (!(pfn & 1)) { 751 printk("ioremap failed... pte not valid...\n"); 752 vfree(area->addr); 753 return NULL; 754 } 755 pfn >>= 1; /* make it a true pfn */ 756 757 if (__alpha_remap_area_pages(vaddr, 758 pfn << PAGE_SHIFT, 759 PAGE_SIZE, 0)) { 760 printk("FAILED to map...\n"); 761 vfree(area->addr); 762 return NULL; 763 } 764 } 765 766 flush_tlb_all(); 767 768 vaddr = (unsigned long)area->addr + (addr & ~PAGE_MASK); 769 770 return (void __iomem *) vaddr; 771 } 772 773 /* Assume it was already a reasonable address */ 774 vaddr = baddr + hose->mem_space->start; 775 return (void __iomem *) vaddr; 776 } 777 778 void 779 marvel_iounmap(volatile void __iomem *xaddr) 780 { 781 unsigned long addr = (unsigned long) xaddr; 782 if (addr >= VMALLOC_START) 783 vfree((void *)(PAGE_MASK & addr)); 784 } 785 786 int 787 marvel_is_mmio(const volatile void __iomem *xaddr) 788 { 789 unsigned long addr = (unsigned long) xaddr; 790 791 if (addr >= VMALLOC_START) 792 return 1; 793 else 794 return (addr & 0xFF000000UL) == 0; 795 } 796 797 #define __marvel_is_port_kbd(a) (((a) == 0x60) || ((a) == 0x64)) 798 #define __marvel_is_port_rtc(a) (((a) == 0x70) || ((a) == 0x71)) 799 800 void __iomem *marvel_ioportmap (unsigned long addr) 801 { 802 FIXUP_IOADDR_VGA(addr); 803 return (void __iomem *)addr; 804 } 805 806 unsigned int 807 marvel_ioread8(const void __iomem *xaddr) 808 { 809 unsigned long addr = (unsigned long) xaddr; 810 if (__marvel_is_port_kbd(addr)) 811 return 0; 812 else if (__marvel_is_port_rtc(addr)) 813 return __marvel_rtc_io(0, addr, 0); 814 else if (marvel_is_ioaddr(addr)) 815 return __kernel_ldbu(*(vucp)addr); 816 else 817 /* this should catch other legacy addresses 818 that would normally fail on MARVEL, 819 because there really is nothing there... 820 */ 821 return ~0; 822 } 823 824 void 825 marvel_iowrite8(u8 b, void __iomem *xaddr) 826 { 827 unsigned long addr = (unsigned long) xaddr; 828 if (__marvel_is_port_kbd(addr)) 829 return; 830 else if (__marvel_is_port_rtc(addr)) 831 __marvel_rtc_io(b, addr, 1); 832 else if (marvel_is_ioaddr(addr)) 833 __kernel_stb(b, *(vucp)addr); 834 } 835 836 #ifndef CONFIG_ALPHA_GENERIC 837 EXPORT_SYMBOL(marvel_ioremap); 838 EXPORT_SYMBOL(marvel_iounmap); 839 EXPORT_SYMBOL(marvel_is_mmio); 840 EXPORT_SYMBOL(marvel_ioportmap); 841 EXPORT_SYMBOL(marvel_ioread8); 842 EXPORT_SYMBOL(marvel_iowrite8); 843 #endif 844 845 /* 846 * AGP GART Support. 847 */ 848 #include <linux/agp_backend.h> 849 #include <asm/agp_backend.h> 850 #include <linux/slab.h> 851 #include <linux/delay.h> 852 853 struct marvel_agp_aperture { 854 struct pci_iommu_arena *arena; 855 long pg_start; 856 long pg_count; 857 }; 858 859 static int 860 marvel_agp_setup(alpha_agp_info *agp) 861 { 862 struct marvel_agp_aperture *aper; 863 864 if (!alpha_agpgart_size) 865 return -ENOMEM; 866 867 aper = kmalloc(sizeof(*aper), GFP_KERNEL); 868 if (aper == NULL) return -ENOMEM; 869 870 aper->arena = agp->hose->sg_pci; 871 aper->pg_count = alpha_agpgart_size / PAGE_SIZE; 872 aper->pg_start = iommu_reserve(aper->arena, aper->pg_count, 873 aper->pg_count - 1); 874 875 if (aper->pg_start < 0) { 876 printk(KERN_ERR "Failed to reserve AGP memory\n"); 877 kfree(aper); 878 return -ENOMEM; 879 } 880 881 agp->aperture.bus_base = 882 aper->arena->dma_base + aper->pg_start * PAGE_SIZE; 883 agp->aperture.size = aper->pg_count * PAGE_SIZE; 884 agp->aperture.sysdata = aper; 885 886 return 0; 887 } 888 889 static void 890 marvel_agp_cleanup(alpha_agp_info *agp) 891 { 892 struct marvel_agp_aperture *aper = agp->aperture.sysdata; 893 int status; 894 895 status = iommu_release(aper->arena, aper->pg_start, aper->pg_count); 896 if (status == -EBUSY) { 897 printk(KERN_WARNING 898 "Attempted to release bound AGP memory - unbinding\n"); 899 iommu_unbind(aper->arena, aper->pg_start, aper->pg_count); 900 status = iommu_release(aper->arena, aper->pg_start, 901 aper->pg_count); 902 } 903 if (status < 0) 904 printk(KERN_ERR "Failed to release AGP memory\n"); 905 906 kfree(aper); 907 kfree(agp); 908 } 909 910 static int 911 marvel_agp_configure(alpha_agp_info *agp) 912 { 913 io7_ioport_csrs *csrs = ((struct io7_port *)agp->hose->sysdata)->csrs; 914 struct io7 *io7 = ((struct io7_port *)agp->hose->sysdata)->io7; 915 unsigned int new_rate = 0; 916 unsigned long agp_pll; 917 918 /* 919 * Check the requested mode against the PLL setting. 920 * The agpgart_be code has not programmed the card yet, 921 * so we can still tweak mode here. 922 */ 923 agp_pll = io7->csrs->POx_RST[IO7_AGP_PORT].csr; 924 switch(IO7_PLL_RNGB(agp_pll)) { 925 case 0x4: /* 2x only */ 926 /* 927 * The PLL is only programmed for 2x, so adjust the 928 * rate to 2x, if necessary. 929 */ 930 if (agp->mode.bits.rate != 2) 931 new_rate = 2; 932 break; 933 934 case 0x6: /* 1x / 4x */ 935 /* 936 * The PLL is programmed for 1x or 4x. Don't go faster 937 * than requested, so if the requested rate is 2x, use 1x. 938 */ 939 if (agp->mode.bits.rate == 2) 940 new_rate = 1; 941 break; 942 943 default: /* ??????? */ 944 /* 945 * Don't know what this PLL setting is, take the requested 946 * rate, but warn the user. 947 */ 948 printk("%s: unknown PLL setting RNGB=%lx (PLL6_CTL=%016lx)\n", 949 __func__, IO7_PLL_RNGB(agp_pll), agp_pll); 950 break; 951 } 952 953 /* 954 * Set the new rate, if necessary. 955 */ 956 if (new_rate) { 957 printk("Requested AGP Rate %dX not compatible " 958 "with PLL setting - using %dX\n", 959 agp->mode.bits.rate, 960 new_rate); 961 962 agp->mode.bits.rate = new_rate; 963 } 964 965 printk("Enabling AGP on hose %d: %dX%s RQ %d\n", 966 agp->hose->index, agp->mode.bits.rate, 967 agp->mode.bits.sba ? " - SBA" : "", agp->mode.bits.rq); 968 969 csrs->AGP_CMD.csr = agp->mode.lw; 970 971 return 0; 972 } 973 974 static int 975 marvel_agp_bind_memory(alpha_agp_info *agp, off_t pg_start, struct agp_memory *mem) 976 { 977 struct marvel_agp_aperture *aper = agp->aperture.sysdata; 978 return iommu_bind(aper->arena, aper->pg_start + pg_start, 979 mem->page_count, mem->pages); 980 } 981 982 static int 983 marvel_agp_unbind_memory(alpha_agp_info *agp, off_t pg_start, struct agp_memory *mem) 984 { 985 struct marvel_agp_aperture *aper = agp->aperture.sysdata; 986 return iommu_unbind(aper->arena, aper->pg_start + pg_start, 987 mem->page_count); 988 } 989 990 static unsigned long 991 marvel_agp_translate(alpha_agp_info *agp, dma_addr_t addr) 992 { 993 struct marvel_agp_aperture *aper = agp->aperture.sysdata; 994 unsigned long baddr = addr - aper->arena->dma_base; 995 unsigned long pte; 996 997 if (addr < agp->aperture.bus_base || 998 addr >= agp->aperture.bus_base + agp->aperture.size) { 999 printk("%s: addr out of range\n", __func__); 1000 return -EINVAL; 1001 } 1002 1003 pte = aper->arena->ptes[baddr >> PAGE_SHIFT]; 1004 if (!(pte & 1)) { 1005 printk("%s: pte not valid\n", __func__); 1006 return -EINVAL; 1007 } 1008 return (pte >> 1) << PAGE_SHIFT; 1009 } 1010 1011 struct alpha_agp_ops marvel_agp_ops = 1012 { 1013 .setup = marvel_agp_setup, 1014 .cleanup = marvel_agp_cleanup, 1015 .configure = marvel_agp_configure, 1016 .bind = marvel_agp_bind_memory, 1017 .unbind = marvel_agp_unbind_memory, 1018 .translate = marvel_agp_translate 1019 }; 1020 1021 alpha_agp_info * 1022 marvel_agp_info(void) 1023 { 1024 struct pci_controller *hose; 1025 io7_ioport_csrs *csrs; 1026 alpha_agp_info *agp; 1027 struct io7 *io7; 1028 1029 /* 1030 * Find the first IO7 with an AGP card. 1031 * 1032 * FIXME -- there should be a better way (we want to be able to 1033 * specify and what if the agp card is not video???) 1034 */ 1035 hose = NULL; 1036 for (io7 = NULL; (io7 = marvel_next_io7(io7)) != NULL; ) { 1037 struct pci_controller *h; 1038 vuip addr; 1039 1040 if (!io7->ports[IO7_AGP_PORT].enabled) 1041 continue; 1042 1043 h = io7->ports[IO7_AGP_PORT].hose; 1044 addr = (vuip)build_conf_addr(h, 0, PCI_DEVFN(5, 0), 0); 1045 1046 if (*addr != 0xffffffffu) { 1047 hose = h; 1048 break; 1049 } 1050 } 1051 1052 if (!hose || !hose->sg_pci) 1053 return NULL; 1054 1055 printk("MARVEL - using hose %d as AGP\n", hose->index); 1056 1057 /* 1058 * Get the csrs from the hose. 1059 */ 1060 csrs = ((struct io7_port *)hose->sysdata)->csrs; 1061 1062 /* 1063 * Allocate the info structure. 1064 */ 1065 agp = kmalloc(sizeof(*agp), GFP_KERNEL); 1066 if (!agp) 1067 return NULL; 1068 1069 /* 1070 * Fill it in. 1071 */ 1072 agp->hose = hose; 1073 agp->private = NULL; 1074 agp->ops = &marvel_agp_ops; 1075 1076 /* 1077 * Aperture - not configured until ops.setup(). 1078 */ 1079 agp->aperture.bus_base = 0; 1080 agp->aperture.size = 0; 1081 agp->aperture.sysdata = NULL; 1082 1083 /* 1084 * Capabilities. 1085 * 1086 * NOTE: IO7 reports through AGP_STAT that it can support a read queue 1087 * depth of 17 (rq = 0x10). It actually only supports a depth of 1088 * 16 (rq = 0xf). 1089 */ 1090 agp->capability.lw = csrs->AGP_STAT.csr; 1091 agp->capability.bits.rq = 0xf; 1092 1093 /* 1094 * Mode. 1095 */ 1096 agp->mode.lw = csrs->AGP_CMD.csr; 1097 1098 return agp; 1099 } 1100