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>
22 #include <asm/starfire.h>
24 #include "iommu_common.h"
26 /* These should be allocated on an SMP_CACHE_BYTES
27 * aligned boundary for optimal performance.
29 * On SYSIO, using an 8K page size we have 1GB of SBUS
30 * DMA space mapped. We divide this space into equally
31 * sized clusters. We allocate a DMA mapping from the
32 * cluster that matches the order of the allocation, or
33 * if the order is greater than the number of clusters,
34 * we try to allocate from the last cluster.
38 #define ONE_GIG (1UL * 1024UL * 1024UL * 1024UL)
39 #define CLUSTER_SIZE (ONE_GIG / NCLUSTERS)
40 #define CLUSTER_MASK (CLUSTER_SIZE - 1)
41 #define CLUSTER_NPAGES (CLUSTER_SIZE >> IO_PAGE_SHIFT)
42 #define MAP_BASE ((u32)0xc0000000)
45 /*0x00*/spinlock_t lock;
47 /*0x08*/iopte_t *page_table;
48 /*0x10*/unsigned long strbuf_regs;
49 /*0x18*/unsigned long iommu_regs;
50 /*0x20*/unsigned long sbus_control_reg;
52 /*0x28*/volatile unsigned long strbuf_flushflag;
54 /* If NCLUSTERS is ever decresed to 4 or lower,
55 * you must increase the size of the type of
56 * these counters. You have been duly warned. -DaveM
61 } alloc_info[NCLUSTERS];
63 /* The lowest used consistent mapping entry. Since
64 * we allocate consistent maps out of cluster 0 this
65 * is relative to the beginning of closter 0.
67 /*0x50*/u32 lowest_consistent_map;
70 /* Offsets from iommu_regs */
71 #define SYSIO_IOMMUREG_BASE 0x2400UL
72 #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
73 #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
74 #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
75 #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
76 #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
77 #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
78 #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
79 #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
81 #define IOMMU_DRAM_VALID (1UL << 30UL)
83 static void __iommu_flushall(struct sbus_iommu *iommu)
85 unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
88 for (entry = 0; entry < 16; entry++) {
92 upa_readq(iommu->sbus_control_reg);
94 for (entry = 0; entry < NCLUSTERS; entry++) {
95 iommu->alloc_info[entry].flush =
96 iommu->alloc_info[entry].next;
100 static void iommu_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages)
103 upa_writeq(base + (npages << IO_PAGE_SHIFT),
104 iommu->iommu_regs + IOMMU_FLUSH);
105 upa_readq(iommu->sbus_control_reg);
108 /* Offsets from strbuf_regs */
109 #define SYSIO_STRBUFREG_BASE 0x2800UL
110 #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
111 #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
112 #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
113 #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
114 #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
115 #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
116 #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
118 #define STRBUF_TAG_VALID 0x02UL
120 static void sbus_strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages, int direction)
127 upa_writeq(base + (n << IO_PAGE_SHIFT),
128 iommu->strbuf_regs + STRBUF_PFLUSH);
130 /* If the device could not have possibly put dirty data into
131 * the streaming cache, no flush-flag synchronization needs
134 if (direction == SBUS_DMA_TODEVICE)
137 iommu->strbuf_flushflag = 0UL;
139 /* Whoopee cushion! */
140 upa_writeq(__pa(&iommu->strbuf_flushflag),
141 iommu->strbuf_regs + STRBUF_FSYNC);
142 upa_readq(iommu->sbus_control_reg);
145 while (iommu->strbuf_flushflag == 0UL) {
153 printk(KERN_WARNING "sbus_strbuf_flush: flushflag timeout "
154 "vaddr[%08x] npages[%ld]\n",
158 static iopte_t *alloc_streaming_cluster(struct sbus_iommu *iommu, unsigned long npages)
160 iopte_t *iopte, *limit, *first, *cluster;
161 unsigned long cnum, ent, nent, flush_point, found;
165 while ((1UL << cnum) < npages)
167 if(cnum >= NCLUSTERS) {
168 nent = 1UL << (cnum - NCLUSTERS);
169 cnum = NCLUSTERS - 1;
171 iopte = iommu->page_table + (cnum * CLUSTER_NPAGES);
174 limit = (iommu->page_table +
175 iommu->lowest_consistent_map);
177 limit = (iopte + CLUSTER_NPAGES);
179 iopte += ((ent = iommu->alloc_info[cnum].next) << cnum);
180 flush_point = iommu->alloc_info[cnum].flush;
186 if (iopte_val(*iopte) == 0UL) {
191 /* Used cluster in the way */
199 iopte += (1 << cnum);
201 if (iopte >= limit) {
202 iopte = (iommu->page_table + (cnum * CLUSTER_NPAGES));
205 /* Multiple cluster allocations must not wrap */
209 if (ent == flush_point)
210 __iommu_flushall(iommu);
215 /* ent/iopte points to the last cluster entry we're going to use,
216 * so save our place for the next allocation.
218 if ((iopte + (1 << cnum)) >= limit)
222 iommu->alloc_info[cnum].next = ent;
223 if (ent == flush_point)
224 __iommu_flushall(iommu);
226 /* I've got your streaming cluster right here buddy boy... */
230 printk(KERN_EMERG "sbus: alloc_streaming_cluster of npages(%ld) failed!\n",
235 static void free_streaming_cluster(struct sbus_iommu *iommu, u32 base, unsigned long npages)
237 unsigned long cnum, ent, nent;
242 while ((1UL << cnum) < npages)
244 if(cnum >= NCLUSTERS) {
245 nent = 1UL << (cnum - NCLUSTERS);
246 cnum = NCLUSTERS - 1;
248 ent = (base & CLUSTER_MASK) >> (IO_PAGE_SHIFT + cnum);
249 iopte = iommu->page_table + ((base - MAP_BASE) >> IO_PAGE_SHIFT);
251 iopte_val(*iopte) = 0UL;
255 /* If the global flush might not have caught this entry,
256 * adjust the flush point such that we will flush before
257 * ever trying to reuse it.
259 #define between(X,Y,Z) (((Z) - (Y)) >= ((X) - (Y)))
260 if (between(ent, iommu->alloc_info[cnum].next, iommu->alloc_info[cnum].flush))
261 iommu->alloc_info[cnum].flush = ent;
265 /* We allocate consistent mappings from the end of cluster zero. */
266 static iopte_t *alloc_consistent_cluster(struct sbus_iommu *iommu, unsigned long npages)
270 iopte = iommu->page_table + (1 * CLUSTER_NPAGES);
271 while (iopte > iommu->page_table) {
273 if (!(iopte_val(*iopte) & IOPTE_VALID)) {
274 unsigned long tmp = npages;
278 if (iopte_val(*iopte) & IOPTE_VALID)
282 u32 entry = (iopte - iommu->page_table);
284 if (entry < iommu->lowest_consistent_map)
285 iommu->lowest_consistent_map = entry;
293 static void free_consistent_cluster(struct sbus_iommu *iommu, u32 base, unsigned long npages)
295 iopte_t *iopte = iommu->page_table + ((base - MAP_BASE) >> IO_PAGE_SHIFT);
297 if ((iopte - iommu->page_table) == iommu->lowest_consistent_map) {
298 iopte_t *walk = iopte + npages;
301 limit = iommu->page_table + CLUSTER_NPAGES;
302 while (walk < limit) {
303 if (iopte_val(*walk) != 0UL)
307 iommu->lowest_consistent_map =
308 (walk - iommu->page_table);
312 *iopte++ = __iopte(0UL);
315 void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma_addr)
317 unsigned long order, first_page, flags;
318 struct sbus_iommu *iommu;
323 if (size <= 0 || sdev == NULL || dvma_addr == NULL)
326 size = IO_PAGE_ALIGN(size);
327 order = get_order(size);
330 first_page = __get_free_pages(GFP_KERNEL|__GFP_COMP, order);
331 if (first_page == 0UL)
333 memset((char *)first_page, 0, PAGE_SIZE << order);
335 iommu = sdev->bus->iommu;
337 spin_lock_irqsave(&iommu->lock, flags);
338 iopte = alloc_consistent_cluster(iommu, size >> IO_PAGE_SHIFT);
340 spin_unlock_irqrestore(&iommu->lock, flags);
341 free_pages(first_page, order);
345 /* Ok, we're committed at this point. */
346 *dvma_addr = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
347 ret = (void *) first_page;
348 npages = size >> IO_PAGE_SHIFT;
350 *iopte++ = __iopte(IOPTE_VALID | IOPTE_CACHE | IOPTE_WRITE |
351 (__pa(first_page) & IOPTE_PAGE));
352 first_page += IO_PAGE_SIZE;
354 iommu_flush(iommu, *dvma_addr, size >> IO_PAGE_SHIFT);
355 spin_unlock_irqrestore(&iommu->lock, flags);
360 void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *cpu, dma_addr_t dvma)
362 unsigned long order, npages;
363 struct sbus_iommu *iommu;
365 if (size <= 0 || sdev == NULL || cpu == NULL)
368 npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
369 iommu = sdev->bus->iommu;
371 spin_lock_irq(&iommu->lock);
372 free_consistent_cluster(iommu, dvma, npages);
373 iommu_flush(iommu, dvma, npages);
374 spin_unlock_irq(&iommu->lock);
376 order = get_order(size);
378 free_pages((unsigned long)cpu, order);
381 dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t size, int dir)
383 struct sbus_iommu *iommu = sdev->bus->iommu;
384 unsigned long npages, pbase, flags;
386 u32 dma_base, offset;
387 unsigned long iopte_bits;
389 if (dir == SBUS_DMA_NONE)
392 pbase = (unsigned long) ptr;
393 offset = (u32) (pbase & ~IO_PAGE_MASK);
394 size = (IO_PAGE_ALIGN(pbase + size) - (pbase & IO_PAGE_MASK));
395 pbase = (unsigned long) __pa(pbase & IO_PAGE_MASK);
397 spin_lock_irqsave(&iommu->lock, flags);
398 npages = size >> IO_PAGE_SHIFT;
399 iopte = alloc_streaming_cluster(iommu, npages);
402 dma_base = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
403 npages = size >> IO_PAGE_SHIFT;
404 iopte_bits = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
405 if (dir != SBUS_DMA_TODEVICE)
406 iopte_bits |= IOPTE_WRITE;
408 *iopte++ = __iopte(iopte_bits | (pbase & IOPTE_PAGE));
409 pbase += IO_PAGE_SIZE;
411 npages = size >> IO_PAGE_SHIFT;
412 spin_unlock_irqrestore(&iommu->lock, flags);
414 return (dma_base | offset);
417 spin_unlock_irqrestore(&iommu->lock, flags);
422 void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t dma_addr, size_t size, int direction)
424 struct sbus_iommu *iommu = sdev->bus->iommu;
425 u32 dma_base = dma_addr & IO_PAGE_MASK;
428 size = (IO_PAGE_ALIGN(dma_addr + size) - dma_base);
430 spin_lock_irqsave(&iommu->lock, flags);
431 free_streaming_cluster(iommu, dma_base, size >> IO_PAGE_SHIFT);
432 sbus_strbuf_flush(iommu, dma_base, size >> IO_PAGE_SHIFT, direction);
433 spin_unlock_irqrestore(&iommu->lock, flags);
436 #define SG_ENT_PHYS_ADDRESS(SG) \
437 (__pa(page_address((SG)->page)) + (SG)->offset)
439 static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg, int nused, int nelems, unsigned long iopte_bits)
441 struct scatterlist *dma_sg = sg;
442 struct scatterlist *sg_end = sg + nelems;
445 for (i = 0; i < nused; i++) {
446 unsigned long pteval = ~0UL;
449 dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
451 ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
453 unsigned long offset;
456 /* If we are here, we know we have at least one
457 * more page to map. So walk forward until we
458 * hit a page crossing, and begin creating new
459 * mappings from that spot.
464 tmp = (unsigned long) SG_ENT_PHYS_ADDRESS(sg);
466 if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
467 pteval = tmp & IO_PAGE_MASK;
468 offset = tmp & (IO_PAGE_SIZE - 1UL);
471 if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
472 pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
474 len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
480 pteval = ((pteval & IOPTE_PAGE) | iopte_bits);
482 *iopte++ = __iopte(pteval);
483 pteval += IO_PAGE_SIZE;
484 len -= (IO_PAGE_SIZE - offset);
489 pteval = (pteval & IOPTE_PAGE) + len;
492 /* Skip over any tail mappings we've fully mapped,
493 * adjusting pteval along the way. Stop when we
494 * detect a page crossing event.
496 while (sg < sg_end &&
497 (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
498 (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
500 (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
501 pteval += sg->length;
504 if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
506 } while (dma_npages != 0);
511 int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int dir)
513 struct sbus_iommu *iommu = sdev->bus->iommu;
514 unsigned long flags, npages;
517 struct scatterlist *sgtmp;
519 unsigned long iopte_bits;
521 if (dir == SBUS_DMA_NONE)
524 /* Fast path single entry scatterlists. */
527 sbus_map_single(sdev,
528 (page_address(sg->page) + sg->offset),
530 sg->dma_length = sg->length;
534 npages = prepare_sg(sg, nents);
536 spin_lock_irqsave(&iommu->lock, flags);
537 iopte = alloc_streaming_cluster(iommu, npages);
540 dma_base = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
542 /* Normalize DVMA addresses. */
546 while (used && sgtmp->dma_length) {
547 sgtmp->dma_address += dma_base;
553 iopte_bits = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
554 if (dir != SBUS_DMA_TODEVICE)
555 iopte_bits |= IOPTE_WRITE;
557 fill_sg(iopte, sg, used, nents, iopte_bits);
559 verify_sglist(sg, nents, iopte, npages);
561 spin_unlock_irqrestore(&iommu->lock, flags);
566 spin_unlock_irqrestore(&iommu->lock, flags);
571 void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
573 unsigned long size, flags;
574 struct sbus_iommu *iommu;
578 /* Fast path single entry scatterlists. */
580 sbus_unmap_single(sdev, sg->dma_address, sg->dma_length, direction);
584 dvma_base = sg[0].dma_address & IO_PAGE_MASK;
585 for (i = 0; i < nents; i++) {
586 if (sg[i].dma_length == 0)
590 size = IO_PAGE_ALIGN(sg[i].dma_address + sg[i].dma_length) - dvma_base;
592 iommu = sdev->bus->iommu;
593 spin_lock_irqsave(&iommu->lock, flags);
594 free_streaming_cluster(iommu, dvma_base, size >> IO_PAGE_SHIFT);
595 sbus_strbuf_flush(iommu, dvma_base, size >> IO_PAGE_SHIFT, direction);
596 spin_unlock_irqrestore(&iommu->lock, flags);
599 void sbus_dma_sync_single_for_cpu(struct sbus_dev *sdev, dma_addr_t base, size_t size, int direction)
601 struct sbus_iommu *iommu = sdev->bus->iommu;
604 size = (IO_PAGE_ALIGN(base + size) - (base & IO_PAGE_MASK));
606 spin_lock_irqsave(&iommu->lock, flags);
607 sbus_strbuf_flush(iommu, base & IO_PAGE_MASK, size >> IO_PAGE_SHIFT, direction);
608 spin_unlock_irqrestore(&iommu->lock, flags);
611 void sbus_dma_sync_single_for_device(struct sbus_dev *sdev, dma_addr_t base, size_t size, int direction)
615 void sbus_dma_sync_sg_for_cpu(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
617 struct sbus_iommu *iommu = sdev->bus->iommu;
618 unsigned long flags, size;
622 base = sg[0].dma_address & IO_PAGE_MASK;
623 for (i = 0; i < nents; i++) {
624 if (sg[i].dma_length == 0)
628 size = IO_PAGE_ALIGN(sg[i].dma_address + sg[i].dma_length) - base;
630 spin_lock_irqsave(&iommu->lock, flags);
631 sbus_strbuf_flush(iommu, base, size >> IO_PAGE_SHIFT, direction);
632 spin_unlock_irqrestore(&iommu->lock, flags);
635 void sbus_dma_sync_sg_for_device(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
639 /* Enable 64-bit DVMA mode for the given device. */
640 void sbus_set_sbus64(struct sbus_dev *sdev, int bursts)
642 struct sbus_iommu *iommu = sdev->bus->iommu;
643 int slot = sdev->slot;
644 unsigned long cfg_reg;
647 cfg_reg = iommu->sbus_control_reg;
675 val = upa_readq(cfg_reg);
676 if (val & (1UL << 14UL)) {
677 /* Extended transfer mode already enabled. */
681 val |= (1UL << 14UL);
683 if (bursts & DMA_BURST8)
685 if (bursts & DMA_BURST16)
687 if (bursts & DMA_BURST32)
689 if (bursts & DMA_BURST64)
691 upa_writeq(val, cfg_reg);
694 /* INO number to IMAP register offset for SYSIO external IRQ's.
695 * This should conform to both Sunfire/Wildfire server and Fusion
698 #define SYSIO_IMAP_SLOT0 0x2c04UL
699 #define SYSIO_IMAP_SLOT1 0x2c0cUL
700 #define SYSIO_IMAP_SLOT2 0x2c14UL
701 #define SYSIO_IMAP_SLOT3 0x2c1cUL
702 #define SYSIO_IMAP_SCSI 0x3004UL
703 #define SYSIO_IMAP_ETH 0x300cUL
704 #define SYSIO_IMAP_BPP 0x3014UL
705 #define SYSIO_IMAP_AUDIO 0x301cUL
706 #define SYSIO_IMAP_PFAIL 0x3024UL
707 #define SYSIO_IMAP_KMS 0x302cUL
708 #define SYSIO_IMAP_FLPY 0x3034UL
709 #define SYSIO_IMAP_SHW 0x303cUL
710 #define SYSIO_IMAP_KBD 0x3044UL
711 #define SYSIO_IMAP_MS 0x304cUL
712 #define SYSIO_IMAP_SER 0x3054UL
713 #define SYSIO_IMAP_TIM0 0x3064UL
714 #define SYSIO_IMAP_TIM1 0x306cUL
715 #define SYSIO_IMAP_UE 0x3074UL
716 #define SYSIO_IMAP_CE 0x307cUL
717 #define SYSIO_IMAP_SBERR 0x3084UL
718 #define SYSIO_IMAP_PMGMT 0x308cUL
719 #define SYSIO_IMAP_GFX 0x3094UL
720 #define SYSIO_IMAP_EUPA 0x309cUL
722 #define bogon ((unsigned long) -1)
723 static unsigned long sysio_irq_offsets[] = {
724 /* SBUS Slot 0 --> 3, level 1 --> 7 */
725 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
726 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
727 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
728 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
729 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
730 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
731 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
732 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
734 /* Onboard devices (not relevant/used on SunFire). */
763 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
765 /* Convert Interrupt Mapping register pointer to associated
766 * Interrupt Clear register pointer, SYSIO specific version.
768 #define SYSIO_ICLR_UNUSED0 0x3400UL
769 #define SYSIO_ICLR_SLOT0 0x340cUL
770 #define SYSIO_ICLR_SLOT1 0x344cUL
771 #define SYSIO_ICLR_SLOT2 0x348cUL
772 #define SYSIO_ICLR_SLOT3 0x34ccUL
773 static unsigned long sysio_imap_to_iclr(unsigned long imap)
775 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
779 unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
781 struct sbus_bus *sbus = (struct sbus_bus *)buscookie;
782 struct sbus_iommu *iommu = sbus->iommu;
783 unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
784 unsigned long imap, iclr;
787 imap = sysio_irq_offsets[ino];
788 if (imap == ((unsigned long)-1)) {
789 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
795 /* SYSIO inconsistency. For external SLOTS, we have to select
796 * the right ICLR register based upon the lower SBUS irq level
800 iclr = sysio_imap_to_iclr(imap);
802 int sbus_slot = (ino & 0x18)>>3;
804 sbus_level = ino & 0x7;
808 iclr = reg_base + SYSIO_ICLR_SLOT0;
811 iclr = reg_base + SYSIO_ICLR_SLOT1;
814 iclr = reg_base + SYSIO_ICLR_SLOT2;
818 iclr = reg_base + SYSIO_ICLR_SLOT3;
822 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
824 return build_irq(sbus_level, iclr, imap);
827 /* Error interrupt handling. */
828 #define SYSIO_UE_AFSR 0x0030UL
829 #define SYSIO_UE_AFAR 0x0038UL
830 #define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
831 #define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
832 #define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
833 #define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
834 #define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
835 #define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
836 #define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
837 #define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
838 #define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
839 #define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
840 #define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
841 static irqreturn_t sysio_ue_handler(int irq, void *dev_id, struct pt_regs *regs)
843 struct sbus_bus *sbus = dev_id;
844 struct sbus_iommu *iommu = sbus->iommu;
845 unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
846 unsigned long afsr_reg, afar_reg;
847 unsigned long afsr, afar, error_bits;
850 afsr_reg = reg_base + SYSIO_UE_AFSR;
851 afar_reg = reg_base + SYSIO_UE_AFAR;
853 /* Latch error status. */
854 afsr = upa_readq(afsr_reg);
855 afar = upa_readq(afar_reg);
857 /* Clear primary/secondary error status bits. */
859 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
860 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
861 upa_writeq(error_bits, afsr_reg);
864 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
866 (((error_bits & SYSIO_UEAFSR_PPIO) ?
868 ((error_bits & SYSIO_UEAFSR_PDRD) ?
870 ((error_bits & SYSIO_UEAFSR_PDWR) ?
871 "DVMA Write" : "???")))));
872 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
874 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
875 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
876 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
877 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
878 printk("SYSIO[%x]: Secondary UE errors [", sbus->portid);
880 if (afsr & SYSIO_UEAFSR_SPIO) {
884 if (afsr & SYSIO_UEAFSR_SDRD) {
886 printk("(DVMA Read)");
888 if (afsr & SYSIO_UEAFSR_SDWR) {
890 printk("(DVMA Write)");
899 #define SYSIO_CE_AFSR 0x0040UL
900 #define SYSIO_CE_AFAR 0x0048UL
901 #define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
902 #define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
903 #define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
904 #define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
905 #define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
906 #define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
907 #define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
908 #define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
909 #define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
910 #define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
911 #define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
912 #define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
913 static irqreturn_t sysio_ce_handler(int irq, void *dev_id, struct pt_regs *regs)
915 struct sbus_bus *sbus = dev_id;
916 struct sbus_iommu *iommu = sbus->iommu;
917 unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
918 unsigned long afsr_reg, afar_reg;
919 unsigned long afsr, afar, error_bits;
922 afsr_reg = reg_base + SYSIO_CE_AFSR;
923 afar_reg = reg_base + SYSIO_CE_AFAR;
925 /* Latch error status. */
926 afsr = upa_readq(afsr_reg);
927 afar = upa_readq(afar_reg);
929 /* Clear primary/secondary error status bits. */
931 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
932 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
933 upa_writeq(error_bits, afsr_reg);
935 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
937 (((error_bits & SYSIO_CEAFSR_PPIO) ?
939 ((error_bits & SYSIO_CEAFSR_PDRD) ?
941 ((error_bits & SYSIO_CEAFSR_PDWR) ?
942 "DVMA Write" : "???")))));
944 /* XXX Use syndrome and afar to print out module string just like
945 * XXX UDB CE trap handler does... -DaveM
947 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
949 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
950 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
951 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
952 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
953 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
955 printk("SYSIO[%x]: Secondary CE errors [", sbus->portid);
957 if (afsr & SYSIO_CEAFSR_SPIO) {
961 if (afsr & SYSIO_CEAFSR_SDRD) {
963 printk("(DVMA Read)");
965 if (afsr & SYSIO_CEAFSR_SDWR) {
967 printk("(DVMA Write)");
976 #define SYSIO_SBUS_AFSR 0x2010UL
977 #define SYSIO_SBUS_AFAR 0x2018UL
978 #define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
979 #define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
980 #define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
981 #define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
982 #define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
983 #define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
984 #define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
985 #define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
986 #define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
987 #define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
988 #define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
989 #define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
990 static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id, struct pt_regs *regs)
992 struct sbus_bus *sbus = dev_id;
993 struct sbus_iommu *iommu = sbus->iommu;
994 unsigned long afsr_reg, afar_reg, reg_base;
995 unsigned long afsr, afar, error_bits;
998 reg_base = iommu->sbus_control_reg - 0x2000UL;
999 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
1000 afar_reg = reg_base + SYSIO_SBUS_AFAR;
1002 afsr = upa_readq(afsr_reg);
1003 afar = upa_readq(afar_reg);
1005 /* Clear primary/secondary error status bits. */
1007 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
1008 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
1009 upa_writeq(error_bits, afsr_reg);
1011 /* Log the error. */
1012 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
1014 (((error_bits & SYSIO_SBAFSR_PLE) ?
1016 ((error_bits & SYSIO_SBAFSR_PTO) ?
1018 ((error_bits & SYSIO_SBAFSR_PBERR) ?
1019 "Error Ack" : "???")))),
1020 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
1021 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
1023 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
1024 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
1025 printk("SYSIO[%x]: AFAR[%016lx]\n", sbus->portid, afar);
1026 printk("SYSIO[%x]: Secondary SBUS errors [", sbus->portid);
1028 if (afsr & SYSIO_SBAFSR_SLE) {
1030 printk("(Late PIO Error)");
1032 if (afsr & SYSIO_SBAFSR_STO) {
1034 printk("(Time Out)");
1036 if (afsr & SYSIO_SBAFSR_SBERR) {
1038 printk("(Error Ack)");
1044 /* XXX check iommu/strbuf for further error status XXX */
1049 #define ECC_CONTROL 0x0020UL
1050 #define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
1051 #define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
1052 #define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
1054 #define SYSIO_UE_INO 0x34
1055 #define SYSIO_CE_INO 0x35
1056 #define SYSIO_SBUSERR_INO 0x36
1058 static void __init sysio_register_error_handlers(struct sbus_bus *sbus)
1060 struct sbus_iommu *iommu = sbus->iommu;
1061 unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
1065 irq = sbus_build_irq(sbus, SYSIO_UE_INO);
1066 if (request_irq(irq, sysio_ue_handler,
1067 SA_SHIRQ, "SYSIO UE", sbus) < 0) {
1068 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
1073 irq = sbus_build_irq(sbus, SYSIO_CE_INO);
1074 if (request_irq(irq, sysio_ce_handler,
1075 SA_SHIRQ, "SYSIO CE", sbus) < 0) {
1076 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
1081 irq = sbus_build_irq(sbus, SYSIO_SBUSERR_INO);
1082 if (request_irq(irq, sysio_sbus_error_handler,
1083 SA_SHIRQ, "SYSIO SBUS Error", sbus) < 0) {
1084 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
1089 /* Now turn the error interrupts on and also enable ECC checking. */
1090 upa_writeq((SYSIO_ECNTRL_ECCEN |
1093 reg_base + ECC_CONTROL);
1095 control = upa_readq(iommu->sbus_control_reg);
1096 control |= 0x100UL; /* SBUS Error Interrupt Enable */
1097 upa_writeq(control, iommu->sbus_control_reg);
1100 /* Boot time initialization. */
1101 void __init sbus_iommu_init(int prom_node, struct sbus_bus *sbus)
1103 struct linux_prom64_registers rprop;
1104 struct sbus_iommu *iommu;
1105 unsigned long regs, tsb_base;
1109 sbus->portid = prom_getintdefault(sbus->prom_node,
1112 err = prom_getproperty(prom_node, "reg",
1113 (char *)&rprop, sizeof(rprop));
1115 prom_printf("sbus_iommu_init: Cannot map SYSIO control registers.\n");
1118 regs = rprop.phys_addr;
1120 iommu = kmalloc(sizeof(*iommu) + SMP_CACHE_BYTES, GFP_ATOMIC);
1121 if (iommu == NULL) {
1122 prom_printf("sbus_iommu_init: Fatal error, kmalloc(iommu) failed\n");
1126 /* Align on E$ line boundary. */
1127 iommu = (struct sbus_iommu *)
1128 (((unsigned long)iommu + (SMP_CACHE_BYTES - 1UL)) &
1129 ~(SMP_CACHE_BYTES - 1UL));
1131 memset(iommu, 0, sizeof(*iommu));
1133 /* We start with no consistent mappings. */
1134 iommu->lowest_consistent_map = CLUSTER_NPAGES;
1136 for (i = 0; i < NCLUSTERS; i++) {
1137 iommu->alloc_info[i].flush = 0;
1138 iommu->alloc_info[i].next = 0;
1141 /* Setup spinlock. */
1142 spin_lock_init(&iommu->lock);
1144 /* Init register offsets. */
1145 iommu->iommu_regs = regs + SYSIO_IOMMUREG_BASE;
1146 iommu->strbuf_regs = regs + SYSIO_STRBUFREG_BASE;
1148 /* The SYSIO SBUS control register is used for dummy reads
1149 * in order to ensure write completion.
1151 iommu->sbus_control_reg = regs + 0x2000UL;
1153 /* Link into SYSIO software state. */
1154 sbus->iommu = iommu;
1156 printk("SYSIO: UPA portID %x, at %016lx\n",
1157 sbus->portid, regs);
1159 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
1160 control = upa_readq(iommu->iommu_regs + IOMMU_CONTROL);
1161 control = ((7UL << 16UL) |
1166 /* Using the above configuration we need 1MB iommu page
1167 * table (128K ioptes * 8 bytes per iopte). This is
1168 * page order 7 on UltraSparc.
1170 tsb_base = __get_free_pages(GFP_ATOMIC, get_order(IO_TSB_SIZE));
1171 if (tsb_base == 0UL) {
1172 prom_printf("sbus_iommu_init: Fatal error, cannot alloc TSB table.\n");
1176 iommu->page_table = (iopte_t *) tsb_base;
1177 memset(iommu->page_table, 0, IO_TSB_SIZE);
1179 upa_writeq(control, iommu->iommu_regs + IOMMU_CONTROL);
1181 /* Clean out any cruft in the IOMMU using
1182 * diagnostic accesses.
1184 for (i = 0; i < 16; i++) {
1185 unsigned long dram = iommu->iommu_regs + IOMMU_DRAMDIAG;
1186 unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
1188 dram += (unsigned long)i * 8UL;
1189 tag += (unsigned long)i * 8UL;
1190 upa_writeq(0, dram);
1193 upa_readq(iommu->sbus_control_reg);
1195 /* Give the TSB to SYSIO. */
1196 upa_writeq(__pa(tsb_base), iommu->iommu_regs + IOMMU_TSBBASE);
1198 /* Setup streaming buffer, DE=1 SB_EN=1 */
1199 control = (1UL << 1UL) | (1UL << 0UL);
1200 upa_writeq(control, iommu->strbuf_regs + STRBUF_CONTROL);
1202 /* Clear out the tags using diagnostics. */
1203 for (i = 0; i < 16; i++) {
1204 unsigned long ptag, ltag;
1206 ptag = iommu->strbuf_regs + STRBUF_PTAGDIAG;
1207 ltag = iommu->strbuf_regs + STRBUF_LTAGDIAG;
1208 ptag += (unsigned long)i * 8UL;
1209 ltag += (unsigned long)i * 8UL;
1211 upa_writeq(0UL, ptag);
1212 upa_writeq(0UL, ltag);
1215 /* Enable DVMA arbitration for all devices/slots. */
1216 control = upa_readq(iommu->sbus_control_reg);
1218 upa_writeq(control, iommu->sbus_control_reg);
1220 /* Now some Xfire specific grot... */
1221 if (this_is_starfire)
1222 sbus->starfire_cookie = starfire_hookup(sbus->portid);
1224 sbus->starfire_cookie = NULL;
1226 sysio_register_error_handlers(sbus);