1 /* $Id: sbus.c,v 1.19 2002/01/23 11:27:32 davem Exp $
2 * sbus.c: UltraSparc SBUS controller support.
4 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
7 #include <linux/kernel.h>
8 #include <linux/types.h>
10 #include <linux/spinlock.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
19 #include <asm/cache.h>
23 #include <asm/starfire.h>
25 #include "iommu_common.h"
27 #define MAP_BASE ((u32)0xc0000000)
34 /* Offsets from iommu_regs */
35 #define SYSIO_IOMMUREG_BASE 0x2400UL
36 #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
37 #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
38 #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
39 #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
40 #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
41 #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
42 #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
43 #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
45 #define IOMMU_DRAM_VALID (1UL << 30UL)
47 static void __iommu_flushall(struct iommu *iommu)
52 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
53 for (entry = 0; entry < 16; entry++) {
57 upa_readq(iommu->write_complete_reg);
60 /* Offsets from strbuf_regs */
61 #define SYSIO_STRBUFREG_BASE 0x2800UL
62 #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
63 #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
64 #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
65 #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
66 #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
67 #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
68 #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
70 #define STRBUF_TAG_VALID 0x02UL
72 static void sbus_strbuf_flush(struct iommu *iommu, struct strbuf *strbuf, u32 base, unsigned long npages, int direction)
79 upa_writeq(base + (n << IO_PAGE_SHIFT), strbuf->strbuf_pflush);
81 /* If the device could not have possibly put dirty data into
82 * the streaming cache, no flush-flag synchronization needs
85 if (direction == SBUS_DMA_TODEVICE)
88 *(strbuf->strbuf_flushflag) = 0UL;
90 /* Whoopee cushion! */
91 upa_writeq(strbuf->strbuf_flushflag_pa, strbuf->strbuf_fsync);
92 upa_readq(iommu->write_complete_reg);
95 while (*(strbuf->strbuf_flushflag) == 0UL) {
103 printk(KERN_WARNING "sbus_strbuf_flush: flushflag timeout "
104 "vaddr[%08x] npages[%ld]\n",
108 /* Based largely upon the ppc64 iommu allocator. */
109 static long sbus_arena_alloc(struct iommu *iommu, unsigned long npages)
111 struct iommu_arena *arena = &iommu->arena;
112 unsigned long n, i, start, end, limit;
115 limit = arena->limit;
120 n = find_next_zero_bit(arena->map, limit, start);
122 if (unlikely(end >= limit)) {
123 if (likely(pass < 1)) {
126 __iommu_flushall(iommu);
130 /* Scanned the whole thing, give up. */
135 for (i = n; i < end; i++) {
136 if (test_bit(i, arena->map)) {
142 for (i = n; i < end; i++)
143 __set_bit(i, arena->map);
150 static void sbus_arena_free(struct iommu_arena *arena, unsigned long base, unsigned long npages)
154 for (i = base; i < (base + npages); i++)
155 __clear_bit(i, arena->map);
158 static void sbus_iommu_table_init(struct iommu *iommu, unsigned int tsbsize)
160 unsigned long tsbbase, order, sz, num_tsb_entries;
162 num_tsb_entries = tsbsize / sizeof(iopte_t);
164 /* Setup initial software IOMMU state. */
165 spin_lock_init(&iommu->lock);
166 iommu->page_table_map_base = MAP_BASE;
168 /* Allocate and initialize the free area map. */
169 sz = num_tsb_entries / 8;
170 sz = (sz + 7UL) & ~7UL;
171 iommu->arena.map = kzalloc(sz, GFP_KERNEL);
172 if (!iommu->arena.map) {
173 prom_printf("SBUS_IOMMU: Error, kmalloc(arena.map) failed.\n");
176 iommu->arena.limit = num_tsb_entries;
178 /* Now allocate and setup the IOMMU page table itself. */
179 order = get_order(tsbsize);
180 tsbbase = __get_free_pages(GFP_KERNEL, order);
182 prom_printf("IOMMU: Error, gfp(tsb) failed.\n");
185 iommu->page_table = (iopte_t *)tsbbase;
186 memset(iommu->page_table, 0, tsbsize);
189 static inline iopte_t *alloc_npages(struct iommu *iommu, unsigned long npages)
193 entry = sbus_arena_alloc(iommu, npages);
194 if (unlikely(entry < 0))
197 return iommu->page_table + entry;
200 static inline void free_npages(struct iommu *iommu, dma_addr_t base, unsigned long npages)
202 sbus_arena_free(&iommu->arena, base >> IO_PAGE_SHIFT, npages);
205 void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma_addr)
207 struct sbus_info *info;
210 unsigned long flags, order, first_page;
214 size = IO_PAGE_ALIGN(size);
215 order = get_order(size);
219 first_page = __get_free_pages(GFP_KERNEL|__GFP_COMP, order);
220 if (first_page == 0UL)
222 memset((char *)first_page, 0, PAGE_SIZE << order);
224 info = sdev->bus->iommu;
225 iommu = &info->iommu;
227 spin_lock_irqsave(&iommu->lock, flags);
228 iopte = alloc_npages(iommu, size >> IO_PAGE_SHIFT);
229 spin_unlock_irqrestore(&iommu->lock, flags);
231 if (unlikely(iopte == NULL)) {
232 free_pages(first_page, order);
236 *dvma_addr = (iommu->page_table_map_base +
237 ((iopte - iommu->page_table) << IO_PAGE_SHIFT));
238 ret = (void *) first_page;
239 npages = size >> IO_PAGE_SHIFT;
240 first_page = __pa(first_page);
242 iopte_val(*iopte) = (IOPTE_VALID | IOPTE_CACHE |
244 (first_page & IOPTE_PAGE));
246 first_page += IO_PAGE_SIZE;
252 void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *cpu, dma_addr_t dvma)
254 struct sbus_info *info;
257 unsigned long flags, order, npages;
259 npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
260 info = sdev->bus->iommu;
261 iommu = &info->iommu;
262 iopte = iommu->page_table +
263 ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
265 spin_lock_irqsave(&iommu->lock, flags);
267 free_npages(iommu, dvma - iommu->page_table_map_base, npages);
269 spin_unlock_irqrestore(&iommu->lock, flags);
271 order = get_order(size);
273 free_pages((unsigned long)cpu, order);
276 dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t sz, int direction)
278 struct sbus_info *info;
281 unsigned long flags, npages, oaddr;
282 unsigned long i, base_paddr;
284 unsigned long iopte_protection;
286 info = sdev->bus->iommu;
287 iommu = &info->iommu;
289 if (unlikely(direction == SBUS_DMA_NONE))
292 oaddr = (unsigned long)ptr;
293 npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
294 npages >>= IO_PAGE_SHIFT;
296 spin_lock_irqsave(&iommu->lock, flags);
297 base = alloc_npages(iommu, npages);
298 spin_unlock_irqrestore(&iommu->lock, flags);
303 bus_addr = (iommu->page_table_map_base +
304 ((base - iommu->page_table) << IO_PAGE_SHIFT));
305 ret = bus_addr | (oaddr & ~IO_PAGE_MASK);
306 base_paddr = __pa(oaddr & IO_PAGE_MASK);
308 iopte_protection = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
309 if (direction != SBUS_DMA_TODEVICE)
310 iopte_protection |= IOPTE_WRITE;
312 for (i = 0; i < npages; i++, base++, base_paddr += IO_PAGE_SIZE)
313 iopte_val(*base) = iopte_protection | base_paddr;
318 void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t bus_addr, size_t sz, int direction)
320 struct sbus_info *info = sdev->bus->iommu;
321 struct iommu *iommu = &info->iommu;
322 struct strbuf *strbuf = &info->strbuf;
324 unsigned long flags, npages, i;
326 if (unlikely(direction == SBUS_DMA_NONE))
329 npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
330 npages >>= IO_PAGE_SHIFT;
331 base = iommu->page_table +
332 ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
334 bus_addr &= IO_PAGE_MASK;
336 spin_lock_irqsave(&iommu->lock, flags);
337 sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
338 for (i = 0; i < npages; i++)
339 iopte_val(base[i]) = 0UL;
340 free_npages(iommu, bus_addr - iommu->page_table_map_base, npages);
341 spin_unlock_irqrestore(&iommu->lock, flags);
344 #define SG_ENT_PHYS_ADDRESS(SG) \
345 (__pa(page_address((SG)->page)) + (SG)->offset)
347 static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg,
348 int nused, int nelems, unsigned long iopte_protection)
350 struct scatterlist *dma_sg = sg;
351 struct scatterlist *sg_end = sg + nelems;
354 for (i = 0; i < nused; i++) {
355 unsigned long pteval = ~0UL;
358 dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
360 ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
362 unsigned long offset;
365 /* If we are here, we know we have at least one
366 * more page to map. So walk forward until we
367 * hit a page crossing, and begin creating new
368 * mappings from that spot.
373 tmp = SG_ENT_PHYS_ADDRESS(sg);
375 if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
376 pteval = tmp & IO_PAGE_MASK;
377 offset = tmp & (IO_PAGE_SIZE - 1UL);
380 if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
381 pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
383 len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
389 pteval = iopte_protection | (pteval & IOPTE_PAGE);
391 *iopte++ = __iopte(pteval);
392 pteval += IO_PAGE_SIZE;
393 len -= (IO_PAGE_SIZE - offset);
398 pteval = (pteval & IOPTE_PAGE) + len;
401 /* Skip over any tail mappings we've fully mapped,
402 * adjusting pteval along the way. Stop when we
403 * detect a page crossing event.
405 while (sg < sg_end &&
406 (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
407 (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
409 (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
410 pteval += sg->length;
413 if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
415 } while (dma_npages != 0);
420 int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
422 struct sbus_info *info;
424 unsigned long flags, npages, iopte_protection;
427 struct scatterlist *sgtmp;
430 /* Fast path single entry scatterlists. */
432 sglist->dma_address =
433 sbus_map_single(sdev,
434 (page_address(sglist->page) + sglist->offset),
435 sglist->length, direction);
436 sglist->dma_length = sglist->length;
440 info = sdev->bus->iommu;
441 iommu = &info->iommu;
443 if (unlikely(direction == SBUS_DMA_NONE))
446 npages = prepare_sg(sglist, nelems);
448 spin_lock_irqsave(&iommu->lock, flags);
449 base = alloc_npages(iommu, npages);
450 spin_unlock_irqrestore(&iommu->lock, flags);
452 if (unlikely(base == NULL))
455 dma_base = iommu->page_table_map_base +
456 ((base - iommu->page_table) << IO_PAGE_SHIFT);
458 /* Normalize DVMA addresses. */
462 while (used && sgtmp->dma_length) {
463 sgtmp->dma_address += dma_base;
467 used = nelems - used;
469 iopte_protection = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
470 if (direction != SBUS_DMA_TODEVICE)
471 iopte_protection |= IOPTE_WRITE;
473 fill_sg(base, sglist, used, nelems, iopte_protection);
476 verify_sglist(sglist, nelems, base, npages);
482 void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
484 struct sbus_info *info;
486 struct strbuf *strbuf;
488 unsigned long flags, i, npages;
491 if (unlikely(direction == SBUS_DMA_NONE))
494 info = sdev->bus->iommu;
495 iommu = &info->iommu;
496 strbuf = &info->strbuf;
498 bus_addr = sglist->dma_address & IO_PAGE_MASK;
500 for (i = 1; i < nelems; i++)
501 if (sglist[i].dma_length == 0)
504 npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) -
505 bus_addr) >> IO_PAGE_SHIFT;
507 base = iommu->page_table +
508 ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
510 spin_lock_irqsave(&iommu->lock, flags);
511 sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
512 for (i = 0; i < npages; i++)
513 iopte_val(base[i]) = 0UL;
514 free_npages(iommu, bus_addr - iommu->page_table_map_base, npages);
515 spin_unlock_irqrestore(&iommu->lock, flags);
518 void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t bus_addr, size_t sz, int direction)
520 struct sbus_info *info;
522 struct strbuf *strbuf;
523 unsigned long flags, npages;
525 info = sdev->bus->iommu;
526 iommu = &info->iommu;
527 strbuf = &info->strbuf;
529 npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
530 npages >>= IO_PAGE_SHIFT;
531 bus_addr &= IO_PAGE_MASK;
533 spin_lock_irqsave(&iommu->lock, flags);
534 sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
535 spin_unlock_irqrestore(&iommu->lock, flags);
538 void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t base, size_t size, int direction)
542 void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sglist, int nelems, int direction)
544 struct sbus_info *info;
546 struct strbuf *strbuf;
547 unsigned long flags, npages, i;
550 info = sdev->bus->iommu;
551 iommu = &info->iommu;
552 strbuf = &info->strbuf;
554 bus_addr = sglist[0].dma_address & IO_PAGE_MASK;
555 for (i = 0; i < nelems; i++) {
556 if (!sglist[i].dma_length)
560 npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length)
561 - bus_addr) >> IO_PAGE_SHIFT;
563 spin_lock_irqsave(&iommu->lock, flags);
564 sbus_strbuf_flush(iommu, strbuf, bus_addr, npages, direction);
565 spin_unlock_irqrestore(&iommu->lock, flags);
568 void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
572 /* Enable 64-bit DVMA mode for the given device. */
573 void sbus_set_sbus64(struct sbus_dev *sdev, int bursts)
575 struct sbus_info *info = sdev->bus->iommu;
576 struct iommu *iommu = &info->iommu;
577 int slot = sdev->slot;
578 unsigned long cfg_reg;
581 cfg_reg = iommu->write_complete_reg;
609 val = upa_readq(cfg_reg);
610 if (val & (1UL << 14UL)) {
611 /* Extended transfer mode already enabled. */
615 val |= (1UL << 14UL);
617 if (bursts & DMA_BURST8)
619 if (bursts & DMA_BURST16)
621 if (bursts & DMA_BURST32)
623 if (bursts & DMA_BURST64)
625 upa_writeq(val, cfg_reg);
628 /* INO number to IMAP register offset for SYSIO external IRQ's.
629 * This should conform to both Sunfire/Wildfire server and Fusion
632 #define SYSIO_IMAP_SLOT0 0x2c00UL
633 #define SYSIO_IMAP_SLOT1 0x2c08UL
634 #define SYSIO_IMAP_SLOT2 0x2c10UL
635 #define SYSIO_IMAP_SLOT3 0x2c18UL
636 #define SYSIO_IMAP_SCSI 0x3000UL
637 #define SYSIO_IMAP_ETH 0x3008UL
638 #define SYSIO_IMAP_BPP 0x3010UL
639 #define SYSIO_IMAP_AUDIO 0x3018UL
640 #define SYSIO_IMAP_PFAIL 0x3020UL
641 #define SYSIO_IMAP_KMS 0x3028UL
642 #define SYSIO_IMAP_FLPY 0x3030UL
643 #define SYSIO_IMAP_SHW 0x3038UL
644 #define SYSIO_IMAP_KBD 0x3040UL
645 #define SYSIO_IMAP_MS 0x3048UL
646 #define SYSIO_IMAP_SER 0x3050UL
647 #define SYSIO_IMAP_TIM0 0x3060UL
648 #define SYSIO_IMAP_TIM1 0x3068UL
649 #define SYSIO_IMAP_UE 0x3070UL
650 #define SYSIO_IMAP_CE 0x3078UL
651 #define SYSIO_IMAP_SBERR 0x3080UL
652 #define SYSIO_IMAP_PMGMT 0x3088UL
653 #define SYSIO_IMAP_GFX 0x3090UL
654 #define SYSIO_IMAP_EUPA 0x3098UL
656 #define bogon ((unsigned long) -1)
657 static unsigned long sysio_irq_offsets[] = {
658 /* SBUS Slot 0 --> 3, level 1 --> 7 */
659 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
660 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
661 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
662 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
663 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
664 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
665 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
666 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
668 /* Onboard devices (not relevant/used on SunFire). */
697 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
699 /* Convert Interrupt Mapping register pointer to associated
700 * Interrupt Clear register pointer, SYSIO specific version.
702 #define SYSIO_ICLR_UNUSED0 0x3400UL
703 #define SYSIO_ICLR_SLOT0 0x3408UL
704 #define SYSIO_ICLR_SLOT1 0x3448UL
705 #define SYSIO_ICLR_SLOT2 0x3488UL
706 #define SYSIO_ICLR_SLOT3 0x34c8UL
707 static unsigned long sysio_imap_to_iclr(unsigned long imap)
709 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
713 unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
715 struct sbus_bus *sbus = (struct sbus_bus *)buscookie;
716 struct sbus_info *info = sbus->iommu;
717 struct iommu *iommu = &info->iommu;
718 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
719 unsigned long imap, iclr;
722 imap = sysio_irq_offsets[ino];
723 if (imap == ((unsigned long)-1)) {
724 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
730 /* SYSIO inconsistency. For external SLOTS, we have to select
731 * the right ICLR register based upon the lower SBUS irq level
735 iclr = sysio_imap_to_iclr(imap);
737 int sbus_slot = (ino & 0x18)>>3;
739 sbus_level = ino & 0x7;
743 iclr = reg_base + SYSIO_ICLR_SLOT0;
746 iclr = reg_base + SYSIO_ICLR_SLOT1;
749 iclr = reg_base + SYSIO_ICLR_SLOT2;
753 iclr = reg_base + SYSIO_ICLR_SLOT3;
757 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
759 return build_irq(sbus_level, iclr, imap);
762 /* Error interrupt handling. */
763 #define SYSIO_UE_AFSR 0x0030UL
764 #define SYSIO_UE_AFAR 0x0038UL
765 #define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
766 #define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
767 #define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
768 #define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
769 #define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
770 #define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
771 #define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
772 #define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
773 #define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
774 #define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
775 #define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
776 static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
778 struct sbus_bus *sbus = dev_id;
779 struct sbus_info *info = sbus->iommu;
780 struct iommu *iommu = &info->iommu;
781 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
782 unsigned long afsr_reg, afar_reg;
783 unsigned long afsr, afar, error_bits;
786 afsr_reg = reg_base + SYSIO_UE_AFSR;
787 afar_reg = reg_base + SYSIO_UE_AFAR;
789 /* Latch error status. */
790 afsr = upa_readq(afsr_reg);
791 afar = upa_readq(afar_reg);
793 /* Clear primary/secondary error status bits. */
795 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
796 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
797 upa_writeq(error_bits, afsr_reg);
800 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
802 (((error_bits & SYSIO_UEAFSR_PPIO) ?
804 ((error_bits & SYSIO_UEAFSR_PDRD) ?
806 ((error_bits & SYSIO_UEAFSR_PDWR) ?
807 "DVMA Write" : "???")))));
808 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
810 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
811 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
812 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
813 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
814 printk("SYSIO[%x]: Secondary UE errors [", sbus->portid);
816 if (afsr & SYSIO_UEAFSR_SPIO) {
820 if (afsr & SYSIO_UEAFSR_SDRD) {
822 printk("(DVMA Read)");
824 if (afsr & SYSIO_UEAFSR_SDWR) {
826 printk("(DVMA Write)");
835 #define SYSIO_CE_AFSR 0x0040UL
836 #define SYSIO_CE_AFAR 0x0048UL
837 #define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
838 #define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
839 #define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
840 #define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
841 #define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
842 #define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
843 #define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
844 #define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
845 #define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
846 #define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
847 #define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
848 #define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
849 static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
851 struct sbus_bus *sbus = dev_id;
852 struct sbus_info *info = sbus->iommu;
853 struct iommu *iommu = &info->iommu;
854 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
855 unsigned long afsr_reg, afar_reg;
856 unsigned long afsr, afar, error_bits;
859 afsr_reg = reg_base + SYSIO_CE_AFSR;
860 afar_reg = reg_base + SYSIO_CE_AFAR;
862 /* Latch error status. */
863 afsr = upa_readq(afsr_reg);
864 afar = upa_readq(afar_reg);
866 /* Clear primary/secondary error status bits. */
868 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
869 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
870 upa_writeq(error_bits, afsr_reg);
872 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
874 (((error_bits & SYSIO_CEAFSR_PPIO) ?
876 ((error_bits & SYSIO_CEAFSR_PDRD) ?
878 ((error_bits & SYSIO_CEAFSR_PDWR) ?
879 "DVMA Write" : "???")))));
881 /* XXX Use syndrome and afar to print out module string just like
882 * XXX UDB CE trap handler does... -DaveM
884 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
886 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
887 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
888 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
889 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
890 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
892 printk("SYSIO[%x]: Secondary CE errors [", sbus->portid);
894 if (afsr & SYSIO_CEAFSR_SPIO) {
898 if (afsr & SYSIO_CEAFSR_SDRD) {
900 printk("(DVMA Read)");
902 if (afsr & SYSIO_CEAFSR_SDWR) {
904 printk("(DVMA Write)");
913 #define SYSIO_SBUS_AFSR 0x2010UL
914 #define SYSIO_SBUS_AFAR 0x2018UL
915 #define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
916 #define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
917 #define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
918 #define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
919 #define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
920 #define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
921 #define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
922 #define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
923 #define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
924 #define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
925 #define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
926 #define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
927 static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
929 struct sbus_bus *sbus = dev_id;
930 struct sbus_info *info = sbus->iommu;
931 struct iommu *iommu = &info->iommu;
932 unsigned long afsr_reg, afar_reg, reg_base;
933 unsigned long afsr, afar, error_bits;
936 reg_base = iommu->write_complete_reg - 0x2000UL;
937 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
938 afar_reg = reg_base + SYSIO_SBUS_AFAR;
940 afsr = upa_readq(afsr_reg);
941 afar = upa_readq(afar_reg);
943 /* Clear primary/secondary error status bits. */
945 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
946 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
947 upa_writeq(error_bits, afsr_reg);
950 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
952 (((error_bits & SYSIO_SBAFSR_PLE) ?
954 ((error_bits & SYSIO_SBAFSR_PTO) ?
956 ((error_bits & SYSIO_SBAFSR_PBERR) ?
957 "Error Ack" : "???")))),
958 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
959 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
961 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
962 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
963 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
964 printk("SYSIO[%x]: Secondary SBUS errors [", sbus->portid);
966 if (afsr & SYSIO_SBAFSR_SLE) {
968 printk("(Late PIO Error)");
970 if (afsr & SYSIO_SBAFSR_STO) {
972 printk("(Time Out)");
974 if (afsr & SYSIO_SBAFSR_SBERR) {
976 printk("(Error Ack)");
982 /* XXX check iommu/strbuf for further error status XXX */
987 #define ECC_CONTROL 0x0020UL
988 #define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
989 #define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
990 #define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
992 #define SYSIO_UE_INO 0x34
993 #define SYSIO_CE_INO 0x35
994 #define SYSIO_SBUSERR_INO 0x36
996 static void __init sysio_register_error_handlers(struct sbus_bus *sbus)
998 struct sbus_info *info = sbus->iommu;
999 struct iommu *iommu = &info->iommu;
1000 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
1004 irq = sbus_build_irq(sbus, SYSIO_UE_INO);
1005 if (request_irq(irq, sysio_ue_handler, 0,
1006 "SYSIO_UE", sbus) < 0) {
1007 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
1012 irq = sbus_build_irq(sbus, SYSIO_CE_INO);
1013 if (request_irq(irq, sysio_ce_handler, 0,
1014 "SYSIO_CE", sbus) < 0) {
1015 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
1020 irq = sbus_build_irq(sbus, SYSIO_SBUSERR_INO);
1021 if (request_irq(irq, sysio_sbus_error_handler, 0,
1022 "SYSIO_SBERR", sbus) < 0) {
1023 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
1028 /* Now turn the error interrupts on and also enable ECC checking. */
1029 upa_writeq((SYSIO_ECNTRL_ECCEN |
1032 reg_base + ECC_CONTROL);
1034 control = upa_readq(iommu->write_complete_reg);
1035 control |= 0x100UL; /* SBUS Error Interrupt Enable */
1036 upa_writeq(control, iommu->write_complete_reg);
1039 /* Boot time initialization. */
1040 static void __init sbus_iommu_init(int __node, struct sbus_bus *sbus)
1042 const struct linux_prom64_registers *pr;
1043 struct device_node *dp;
1044 struct sbus_info *info;
1045 struct iommu *iommu;
1046 struct strbuf *strbuf;
1047 unsigned long regs, reg_base;
1051 dp = of_find_node_by_phandle(__node);
1053 sbus->portid = of_getintprop_default(dp, "upa-portid", -1);
1055 pr = of_get_property(dp, "reg", NULL);
1057 prom_printf("sbus_iommu_init: Cannot map SYSIO control registers.\n");
1060 regs = pr->phys_addr;
1062 info = kzalloc(sizeof(*info), GFP_ATOMIC);
1064 prom_printf("sbus_iommu_init: Fatal error, "
1065 "kmalloc(info) failed\n");
1069 iommu = &info->iommu;
1070 strbuf = &info->strbuf;
1072 reg_base = regs + SYSIO_IOMMUREG_BASE;
1073 iommu->iommu_control = reg_base + IOMMU_CONTROL;
1074 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
1075 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
1077 reg_base = regs + SYSIO_STRBUFREG_BASE;
1078 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
1079 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
1080 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
1082 strbuf->strbuf_enabled = 1;
1084 strbuf->strbuf_flushflag = (volatile unsigned long *)
1085 ((((unsigned long)&strbuf->__flushflag_buf[0])
1088 strbuf->strbuf_flushflag_pa = (unsigned long)
1089 __pa(strbuf->strbuf_flushflag);
1091 /* The SYSIO SBUS control register is used for dummy reads
1092 * in order to ensure write completion.
1094 iommu->write_complete_reg = regs + 0x2000UL;
1096 /* Link into SYSIO software state. */
1099 printk("SYSIO: UPA portID %x, at %016lx\n",
1100 sbus->portid, regs);
1102 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
1103 sbus_iommu_table_init(iommu, IO_TSB_SIZE);
1105 control = upa_readq(iommu->iommu_control);
1106 control = ((7UL << 16UL) |
1110 upa_writeq(control, iommu->iommu_control);
1112 /* Clean out any cruft in the IOMMU using
1113 * diagnostic accesses.
1115 for (i = 0; i < 16; i++) {
1116 unsigned long dram, tag;
1118 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
1119 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
1121 dram += (unsigned long)i * 8UL;
1122 tag += (unsigned long)i * 8UL;
1123 upa_writeq(0, dram);
1126 upa_readq(iommu->write_complete_reg);
1128 /* Give the TSB to SYSIO. */
1129 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
1131 /* Setup streaming buffer, DE=1 SB_EN=1 */
1132 control = (1UL << 1UL) | (1UL << 0UL);
1133 upa_writeq(control, strbuf->strbuf_control);
1135 /* Clear out the tags using diagnostics. */
1136 for (i = 0; i < 16; i++) {
1137 unsigned long ptag, ltag;
1139 ptag = strbuf->strbuf_control +
1140 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
1141 ltag = strbuf->strbuf_control +
1142 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
1143 ptag += (unsigned long)i * 8UL;
1144 ltag += (unsigned long)i * 8UL;
1146 upa_writeq(0UL, ptag);
1147 upa_writeq(0UL, ltag);
1150 /* Enable DVMA arbitration for all devices/slots. */
1151 control = upa_readq(iommu->write_complete_reg);
1153 upa_writeq(control, iommu->write_complete_reg);
1155 /* Now some Xfire specific grot... */
1156 if (this_is_starfire)
1157 starfire_hookup(sbus->portid);
1159 sysio_register_error_handlers(sbus);
1162 void sbus_fill_device_irq(struct sbus_dev *sdev)
1164 struct device_node *dp = of_find_node_by_phandle(sdev->prom_node);
1165 const struct linux_prom_irqs *irqs;
1167 irqs = of_get_property(dp, "interrupts", NULL);
1172 unsigned int pri = irqs[0].pri;
1176 pri += sdev->slot * 8;
1178 sdev->irqs[0] = sbus_build_irq(sdev->bus, pri);
1182 void __init sbus_arch_bus_ranges_init(struct device_node *pn, struct sbus_bus *sbus)
1186 void __init sbus_setup_iommu(struct sbus_bus *sbus, struct device_node *dp)
1188 sbus_iommu_init(dp->node, sbus);
1191 void __init sbus_setup_arch_props(struct sbus_bus *sbus, struct device_node *dp)
1195 int __init sbus_arch_preinit(void)
1200 void __init sbus_arch_postinit(void)
1202 extern void firetruck_init(void);