sbus.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:34k
- /* $Id: sbus.c,v 1.17 2001/10/09 02:24:33 davem Exp $
- * sbus.c: UltraSparc SBUS controller support.
- *
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
- */
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/mm.h>
- #include <linux/spinlock.h>
- #include <linux/slab.h>
- #include <linux/init.h>
- #include <asm/page.h>
- #include <asm/sbus.h>
- #include <asm/io.h>
- #include <asm/upa.h>
- #include <asm/cache.h>
- #include <asm/dma.h>
- #include <asm/irq.h>
- #include <asm/starfire.h>
- #include "iommu_common.h"
- /* These should be allocated on an SMP_CACHE_BYTES
- * aligned boundry for optimal performance.
- *
- * On SYSIO, using an 8K page size we have 1GB of SBUS
- * DMA space mapped. We divide this space into equally
- * sized clusters. Currently we allow clusters up to a
- * size of 1MB. If anything begins to generate DMA
- * mapping requests larger than this we will need to
- * increase things a bit.
- */
- #define NCLUSTERS 8UL
- #define ONE_GIG (1UL * 1024UL * 1024UL * 1024UL)
- #define CLUSTER_SIZE (ONE_GIG / NCLUSTERS)
- #define CLUSTER_MASK (CLUSTER_SIZE - 1)
- #define CLUSTER_NPAGES (CLUSTER_SIZE >> IO_PAGE_SHIFT)
- #define MAP_BASE ((u32)0xc0000000)
- struct sbus_iommu {
- /*0x00*/spinlock_t lock;
- /*0x08*/iopte_t *page_table;
- /*0x10*/unsigned long strbuf_regs;
- /*0x18*/unsigned long iommu_regs;
- /*0x20*/unsigned long sbus_control_reg;
- /*0x28*/volatile unsigned long strbuf_flushflag;
- /* If NCLUSTERS is ever decresed to 4 or lower,
- * you must increase the size of the type of
- * these counters. You have been duly warned. -DaveM
- */
- /*0x30*/struct {
- u16 next;
- u16 flush;
- } alloc_info[NCLUSTERS];
- /* The lowest used consistent mapping entry. Since
- * we allocate consistent maps out of cluster 0 this
- * is relative to the beginning of closter 0.
- */
- /*0x50*/u32 lowest_consistent_map;
- };
- /* Offsets from iommu_regs */
- #define SYSIO_IOMMUREG_BASE 0x2400UL
- #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
- #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
- #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
- #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
- #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
- #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
- #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
- #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
- #define IOMMU_DRAM_VALID (1UL << 30UL)
- static void __iommu_flushall(struct sbus_iommu *iommu)
- {
- unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
- int entry;
- for (entry = 0; entry < 16; entry++) {
- upa_writeq(0, tag);
- tag += 8UL;
- }
- upa_readq(iommu->sbus_control_reg);
- for (entry = 0; entry < NCLUSTERS; entry++) {
- iommu->alloc_info[entry].flush =
- iommu->alloc_info[entry].next;
- }
- }
- static void iommu_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages)
- {
- while (npages--)
- upa_writeq(base + (npages << IO_PAGE_SHIFT),
- iommu->iommu_regs + IOMMU_FLUSH);
- upa_readq(iommu->sbus_control_reg);
- }
- /* Offsets from strbuf_regs */
- #define SYSIO_STRBUFREG_BASE 0x2800UL
- #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
- #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
- #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
- #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
- #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
- #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
- #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
- #define STRBUF_TAG_VALID 0x02UL
- static void strbuf_flush(struct sbus_iommu *iommu, u32 base, unsigned long npages)
- {
- iommu->strbuf_flushflag = 0UL;
- while (npages--)
- upa_writeq(base + (npages << IO_PAGE_SHIFT),
- iommu->strbuf_regs + STRBUF_PFLUSH);
- /* Whoopee cushion! */
- upa_writeq(__pa(&iommu->strbuf_flushflag),
- iommu->strbuf_regs + STRBUF_FSYNC);
- upa_readq(iommu->sbus_control_reg);
- while (iommu->strbuf_flushflag == 0UL)
- membar("#LoadLoad");
- }
- static iopte_t *alloc_streaming_cluster(struct sbus_iommu *iommu, unsigned long npages)
- {
- iopte_t *iopte, *limit, *first;
- unsigned long cnum, ent, flush_point;
- cnum = 0;
- while ((1UL << cnum) < npages)
- cnum++;
- iopte = iommu->page_table + (cnum * CLUSTER_NPAGES);
- if (cnum == 0)
- limit = (iommu->page_table +
- iommu->lowest_consistent_map);
- else
- limit = (iopte + CLUSTER_NPAGES);
- iopte += ((ent = iommu->alloc_info[cnum].next) << cnum);
- flush_point = iommu->alloc_info[cnum].flush;
- first = iopte;
- for (;;) {
- if (iopte_val(*iopte) == 0UL) {
- if ((iopte + (1 << cnum)) >= limit)
- ent = 0;
- else
- ent = ent + 1;
- iommu->alloc_info[cnum].next = ent;
- if (ent == flush_point)
- __iommu_flushall(iommu);
- break;
- }
- iopte += (1 << cnum);
- ent++;
- if (iopte >= limit) {
- iopte = (iommu->page_table + (cnum * CLUSTER_NPAGES));
- ent = 0;
- }
- if (ent == flush_point)
- __iommu_flushall(iommu);
- if (iopte == first)
- goto bad;
- }
- /* I've got your streaming cluster right here buddy boy... */
- return iopte;
- bad:
- printk(KERN_EMERG "sbus: alloc_streaming_cluster of npages(%ld) failed!n",
- npages);
- return NULL;
- }
- static void free_streaming_cluster(struct sbus_iommu *iommu, u32 base, unsigned long npages)
- {
- unsigned long cnum, ent;
- iopte_t *iopte;
- cnum = 0;
- while ((1UL << cnum) < npages)
- cnum++;
- ent = (base & CLUSTER_MASK) >> (IO_PAGE_SHIFT + cnum);
- iopte = iommu->page_table + ((base - MAP_BASE) >> IO_PAGE_SHIFT);
- iopte_val(*iopte) = 0UL;
- /* If the global flush might not have caught this entry,
- * adjust the flush point such that we will flush before
- * ever trying to reuse it.
- */
- #define between(X,Y,Z) (((Z) - (Y)) >= ((X) - (Y)))
- if (between(ent, iommu->alloc_info[cnum].next, iommu->alloc_info[cnum].flush))
- iommu->alloc_info[cnum].flush = ent;
- #undef between
- }
- /* We allocate consistent mappings from the end of cluster zero. */
- static iopte_t *alloc_consistent_cluster(struct sbus_iommu *iommu, unsigned long npages)
- {
- iopte_t *iopte;
- iopte = iommu->page_table + (1 * CLUSTER_NPAGES);
- while (iopte > iommu->page_table) {
- iopte--;
- if (!(iopte_val(*iopte) & IOPTE_VALID)) {
- unsigned long tmp = npages;
- while (--tmp) {
- iopte--;
- if (iopte_val(*iopte) & IOPTE_VALID)
- break;
- }
- if (tmp == 0) {
- u32 entry = (iopte - iommu->page_table);
- if (entry < iommu->lowest_consistent_map)
- iommu->lowest_consistent_map = entry;
- return iopte;
- }
- }
- }
- return NULL;
- }
- static void free_consistent_cluster(struct sbus_iommu *iommu, u32 base, unsigned long npages)
- {
- iopte_t *iopte = iommu->page_table + ((base - MAP_BASE) >> IO_PAGE_SHIFT);
- if ((iopte - iommu->page_table) == iommu->lowest_consistent_map) {
- iopte_t *walk = iopte + npages;
- iopte_t *limit;
- limit = iommu->page_table + CLUSTER_NPAGES;
- while (walk < limit) {
- if (iopte_val(*walk) != 0UL)
- break;
- walk++;
- }
- iommu->lowest_consistent_map =
- (walk - iommu->page_table);
- }
- while (npages--)
- *iopte++ = __iopte(0UL);
- }
- void *sbus_alloc_consistent(struct sbus_dev *sdev, size_t size, dma_addr_t *dvma_addr)
- {
- unsigned long order, first_page, flags;
- struct sbus_iommu *iommu;
- iopte_t *iopte;
- void *ret;
- int npages;
- if (size <= 0 || sdev == NULL || dvma_addr == NULL)
- return NULL;
- size = IO_PAGE_ALIGN(size);
- order = get_order(size);
- if (order >= 10)
- return NULL;
- first_page = __get_free_pages(GFP_KERNEL, order);
- if (first_page == 0UL)
- return NULL;
- memset((char *)first_page, 0, PAGE_SIZE << order);
- iommu = sdev->bus->iommu;
- spin_lock_irqsave(&iommu->lock, flags);
- iopte = alloc_consistent_cluster(iommu, size >> IO_PAGE_SHIFT);
- if (iopte == NULL) {
- spin_unlock_irqrestore(&iommu->lock, flags);
- free_pages(first_page, order);
- return NULL;
- }
- /* Ok, we're committed at this point. */
- *dvma_addr = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
- ret = (void *) first_page;
- npages = size >> IO_PAGE_SHIFT;
- while (npages--) {
- *iopte++ = __iopte(IOPTE_VALID | IOPTE_CACHE | IOPTE_WRITE |
- (__pa(first_page) & IOPTE_PAGE));
- first_page += IO_PAGE_SIZE;
- }
- iommu_flush(iommu, *dvma_addr, size >> IO_PAGE_SHIFT);
- spin_unlock_irqrestore(&iommu->lock, flags);
- return ret;
- }
- void sbus_free_consistent(struct sbus_dev *sdev, size_t size, void *cpu, dma_addr_t dvma)
- {
- unsigned long order, npages;
- struct sbus_iommu *iommu;
- if (size <= 0 || sdev == NULL || cpu == NULL)
- return;
- npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
- iommu = sdev->bus->iommu;
- spin_lock_irq(&iommu->lock);
- free_consistent_cluster(iommu, dvma, npages);
- iommu_flush(iommu, dvma, npages);
- spin_unlock_irq(&iommu->lock);
- order = get_order(size);
- if (order < 10)
- free_pages((unsigned long)cpu, order);
- }
- dma_addr_t sbus_map_single(struct sbus_dev *sdev, void *ptr, size_t size, int dir)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- unsigned long npages, pbase, flags;
- iopte_t *iopte;
- u32 dma_base, offset;
- unsigned long iopte_bits;
- if (dir == SBUS_DMA_NONE)
- BUG();
- pbase = (unsigned long) ptr;
- offset = (u32) (pbase & ~IO_PAGE_MASK);
- size = (IO_PAGE_ALIGN(pbase + size) - (pbase & IO_PAGE_MASK));
- pbase = (unsigned long) __pa(pbase & IO_PAGE_MASK);
- spin_lock_irqsave(&iommu->lock, flags);
- npages = size >> IO_PAGE_SHIFT;
- iopte = alloc_streaming_cluster(iommu, npages);
- if (iopte == NULL)
- goto bad;
- dma_base = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
- npages = size >> IO_PAGE_SHIFT;
- iopte_bits = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
- if (dir != SBUS_DMA_TODEVICE)
- iopte_bits |= IOPTE_WRITE;
- while (npages--) {
- *iopte++ = __iopte(iopte_bits | (pbase & IOPTE_PAGE));
- pbase += IO_PAGE_SIZE;
- }
- npages = size >> IO_PAGE_SHIFT;
- spin_unlock_irqrestore(&iommu->lock, flags);
- return (dma_base | offset);
- bad:
- spin_unlock_irqrestore(&iommu->lock, flags);
- BUG();
- return 0;
- }
- void sbus_unmap_single(struct sbus_dev *sdev, dma_addr_t dma_addr, size_t size, int direction)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- u32 dma_base = dma_addr & IO_PAGE_MASK;
- unsigned long flags;
- size = (IO_PAGE_ALIGN(dma_addr + size) - dma_base);
- spin_lock_irqsave(&iommu->lock, flags);
- free_streaming_cluster(iommu, dma_base, size >> IO_PAGE_SHIFT);
- strbuf_flush(iommu, dma_base, size >> IO_PAGE_SHIFT);
- spin_unlock_irqrestore(&iommu->lock, flags);
- }
- #define SG_ENT_PHYS_ADDRESS(SG)
- ((SG)->address ?
- __pa((SG)->address) :
- (__pa(page_address((SG)->page)) + (SG)->offset))
- static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg, int nused, int nelems, unsigned long iopte_bits)
- {
- struct scatterlist *dma_sg = sg;
- struct scatterlist *sg_end = sg + nelems;
- int i;
- for (i = 0; i < nused; i++) {
- unsigned long pteval = ~0UL;
- u32 dma_npages;
- dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
- dma_sg->dma_length +
- ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
- do {
- unsigned long offset;
- signed int len;
- /* If we are here, we know we have at least one
- * more page to map. So walk forward until we
- * hit a page crossing, and begin creating new
- * mappings from that spot.
- */
- for (;;) {
- unsigned long tmp;
- tmp = (unsigned long) SG_ENT_PHYS_ADDRESS(sg);
- len = sg->length;
- if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
- pteval = tmp & IO_PAGE_MASK;
- offset = tmp & (IO_PAGE_SIZE - 1UL);
- break;
- }
- if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
- pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
- offset = 0UL;
- len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
- break;
- }
- sg++;
- }
- pteval = ((pteval & IOPTE_PAGE) | iopte_bits);
- while (len > 0) {
- *iopte++ = __iopte(pteval);
- pteval += IO_PAGE_SIZE;
- len -= (IO_PAGE_SIZE - offset);
- offset = 0;
- dma_npages--;
- }
- pteval = (pteval & IOPTE_PAGE) + len;
- sg++;
- /* Skip over any tail mappings we've fully mapped,
- * adjusting pteval along the way. Stop when we
- * detect a page crossing event.
- */
- while (sg < sg_end &&
- (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
- (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
- ((pteval ^
- (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
- pteval += sg->length;
- sg++;
- }
- if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
- pteval = ~0UL;
- } while (dma_npages != 0);
- dma_sg++;
- }
- }
- int sbus_map_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int dir)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- unsigned long flags, npages;
- iopte_t *iopte;
- u32 dma_base;
- struct scatterlist *sgtmp;
- int used;
- unsigned long iopte_bits;
- if (dir == SBUS_DMA_NONE)
- BUG();
- /* Fast path single entry scatterlists. */
- if (nents == 1) {
- sg->dma_address =
- sbus_map_single(sdev,
- (sg->address ?
- sg->address :
- (page_address(sg->page) + sg->offset)),
- sg->length, dir);
- sg->dma_length = sg->length;
- return 1;
- }
- npages = prepare_sg(sg, nents);
- spin_lock_irqsave(&iommu->lock, flags);
- iopte = alloc_streaming_cluster(iommu, npages);
- if (iopte == NULL)
- goto bad;
- dma_base = MAP_BASE + ((iopte - iommu->page_table) << IO_PAGE_SHIFT);
- /* Normalize DVMA addresses. */
- sgtmp = sg;
- used = nents;
- while (used && sgtmp->dma_length) {
- sgtmp->dma_address += dma_base;
- sgtmp++;
- used--;
- }
- used = nents - used;
- iopte_bits = IOPTE_VALID | IOPTE_STBUF | IOPTE_CACHE;
- if (dir != SBUS_DMA_TODEVICE)
- iopte_bits |= IOPTE_WRITE;
- fill_sg(iopte, sg, used, nents, iopte_bits);
- #ifdef VERIFY_SG
- verify_sglist(sg, nents, iopte, npages);
- #endif
- spin_unlock_irqrestore(&iommu->lock, flags);
- return used;
- bad:
- spin_unlock_irqrestore(&iommu->lock, flags);
- BUG();
- return 0;
- }
- void sbus_unmap_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
- {
- unsigned long size, flags;
- struct sbus_iommu *iommu;
- u32 dvma_base;
- int i;
- /* Fast path single entry scatterlists. */
- if (nents == 1) {
- sbus_unmap_single(sdev, sg->dma_address, sg->dma_length, direction);
- return;
- }
- dvma_base = sg[0].dma_address & IO_PAGE_MASK;
- for (i = 0; i < nents; i++) {
- if (sg[i].dma_length == 0)
- break;
- }
- i--;
- size = IO_PAGE_ALIGN(sg[i].dma_address + sg[i].dma_length) - dvma_base;
- iommu = sdev->bus->iommu;
- spin_lock_irqsave(&iommu->lock, flags);
- free_streaming_cluster(iommu, dvma_base, size >> IO_PAGE_SHIFT);
- strbuf_flush(iommu, dvma_base, size >> IO_PAGE_SHIFT);
- spin_unlock_irqrestore(&iommu->lock, flags);
- }
- void sbus_dma_sync_single(struct sbus_dev *sdev, dma_addr_t base, size_t size, int direction)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- unsigned long flags;
- size = (IO_PAGE_ALIGN(base + size) - (base & IO_PAGE_MASK));
- spin_lock_irqsave(&iommu->lock, flags);
- strbuf_flush(iommu, base & IO_PAGE_MASK, size >> IO_PAGE_SHIFT);
- spin_unlock_irqrestore(&iommu->lock, flags);
- }
- void sbus_dma_sync_sg(struct sbus_dev *sdev, struct scatterlist *sg, int nents, int direction)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- unsigned long flags, size;
- u32 base;
- int i;
- base = sg[0].dma_address & IO_PAGE_MASK;
- for (i = 0; i < nents; i++) {
- if (sg[i].dma_length == 0)
- break;
- }
- i--;
- size = IO_PAGE_ALIGN(sg[i].dma_address + sg[i].dma_length) - base;
- spin_lock_irqsave(&iommu->lock, flags);
- strbuf_flush(iommu, base, size >> IO_PAGE_SHIFT);
- spin_unlock_irqrestore(&iommu->lock, flags);
- }
- /* Enable 64-bit DVMA mode for the given device. */
- void sbus_set_sbus64(struct sbus_dev *sdev, int bursts)
- {
- struct sbus_iommu *iommu = sdev->bus->iommu;
- int slot = sdev->slot;
- unsigned long cfg_reg;
- u64 val;
- cfg_reg = iommu->sbus_control_reg;
- switch (slot) {
- case 0:
- cfg_reg += 0x20UL;
- break;
- case 1:
- cfg_reg += 0x28UL;
- break;
- case 2:
- cfg_reg += 0x30UL;
- break;
- case 3:
- cfg_reg += 0x38UL;
- break;
- case 13:
- cfg_reg += 0x40UL;
- break;
- case 14:
- cfg_reg += 0x48UL;
- break;
- case 15:
- cfg_reg += 0x50UL;
- break;
- default:
- return;
- };
- val = upa_readq(cfg_reg);
- if (val & (1UL << 14UL)) {
- /* Extended transfer mode already enabled. */
- return;
- }
- val |= (1UL << 14UL);
- if (bursts & DMA_BURST8)
- val |= (1UL << 1UL);
- if (bursts & DMA_BURST16)
- val |= (1UL << 2UL);
- if (bursts & DMA_BURST32)
- val |= (1UL << 3UL);
- if (bursts & DMA_BURST64)
- val |= (1UL << 4UL);
- upa_writeq(val, cfg_reg);
- }
- /* SBUS SYSIO INO number to Sparc PIL level. */
- static unsigned char sysio_ino_to_pil[] = {
- 0, 1, 2, 7, 5, 7, 8, 9, /* SBUS slot 0 */
- 0, 1, 2, 7, 5, 7, 8, 9, /* SBUS slot 1 */
- 0, 1, 2, 7, 5, 7, 8, 9, /* SBUS slot 2 */
- 0, 1, 2, 7, 5, 7, 8, 9, /* SBUS slot 3 */
- 3, /* Onboard SCSI */
- 5, /* Onboard Ethernet */
- /*XXX*/ 8, /* Onboard BPP */
- 0, /* Bogon */
- 13, /* Audio */
- /*XXX*/15, /* PowerFail */
- 0, /* Bogon */
- 0, /* Bogon */
- 12, /* Zilog Serial Channels (incl. Keyboard/Mouse lines) */
- 11, /* Floppy */
- 0, /* Spare Hardware (bogon for now) */
- 0, /* Keyboard (bogon for now) */
- 0, /* Mouse (bogon for now) */
- 0, /* Serial (bogon for now) */
- 0, 0, /* Bogon, Bogon */
- 10, /* Timer 0 */
- 11, /* Timer 1 */
- 0, 0, /* Bogon, Bogon */
- 15, /* Uncorrectable SBUS Error */
- 15, /* Correctable SBUS Error */
- 15, /* SBUS Error */
- /*XXX*/ 0, /* Power Management (bogon for now) */
- };
- /* INO number to IMAP register offset for SYSIO external IRQ's.
- * This should conform to both Sunfire/Wildfire server and Fusion
- * desktop designs.
- */
- #define SYSIO_IMAP_SLOT0 0x2c04UL
- #define SYSIO_IMAP_SLOT1 0x2c0cUL
- #define SYSIO_IMAP_SLOT2 0x2c14UL
- #define SYSIO_IMAP_SLOT3 0x2c1cUL
- #define SYSIO_IMAP_SCSI 0x3004UL
- #define SYSIO_IMAP_ETH 0x300cUL
- #define SYSIO_IMAP_BPP 0x3014UL
- #define SYSIO_IMAP_AUDIO 0x301cUL
- #define SYSIO_IMAP_PFAIL 0x3024UL
- #define SYSIO_IMAP_KMS 0x302cUL
- #define SYSIO_IMAP_FLPY 0x3034UL
- #define SYSIO_IMAP_SHW 0x303cUL
- #define SYSIO_IMAP_KBD 0x3044UL
- #define SYSIO_IMAP_MS 0x304cUL
- #define SYSIO_IMAP_SER 0x3054UL
- #define SYSIO_IMAP_TIM0 0x3064UL
- #define SYSIO_IMAP_TIM1 0x306cUL
- #define SYSIO_IMAP_UE 0x3074UL
- #define SYSIO_IMAP_CE 0x307cUL
- #define SYSIO_IMAP_SBERR 0x3084UL
- #define SYSIO_IMAP_PMGMT 0x308cUL
- #define SYSIO_IMAP_GFX 0x3094UL
- #define SYSIO_IMAP_EUPA 0x309cUL
- #define bogon ((unsigned long) -1)
- static unsigned long sysio_irq_offsets[] = {
- /* SBUS Slot 0 --> 3, level 1 --> 7 */
- SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
- SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
- SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
- SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
- SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
- SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
- SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
- SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
- /* Onboard devices (not relevant/used on SunFire). */
- SYSIO_IMAP_SCSI,
- SYSIO_IMAP_ETH,
- SYSIO_IMAP_BPP,
- bogon,
- SYSIO_IMAP_AUDIO,
- SYSIO_IMAP_PFAIL,
- bogon,
- bogon,
- SYSIO_IMAP_KMS,
- SYSIO_IMAP_FLPY,
- SYSIO_IMAP_SHW,
- SYSIO_IMAP_KBD,
- SYSIO_IMAP_MS,
- SYSIO_IMAP_SER,
- bogon,
- bogon,
- SYSIO_IMAP_TIM0,
- SYSIO_IMAP_TIM1,
- bogon,
- bogon,
- SYSIO_IMAP_UE,
- SYSIO_IMAP_CE,
- SYSIO_IMAP_SBERR,
- SYSIO_IMAP_PMGMT,
- };
- #undef bogon
- #define NUM_SYSIO_OFFSETS (sizeof(sysio_irq_offsets) / sizeof(sysio_irq_offsets[0]))
- /* Convert Interrupt Mapping register pointer to assosciated
- * Interrupt Clear register pointer, SYSIO specific version.
- */
- #define SYSIO_ICLR_UNUSED0 0x3400UL
- #define SYSIO_ICLR_SLOT0 0x340cUL
- #define SYSIO_ICLR_SLOT1 0x344cUL
- #define SYSIO_ICLR_SLOT2 0x348cUL
- #define SYSIO_ICLR_SLOT3 0x34ccUL
- static unsigned long sysio_imap_to_iclr(unsigned long imap)
- {
- unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
- return imap + diff;
- }
- unsigned int sbus_build_irq(void *buscookie, unsigned int ino)
- {
- struct sbus_bus *sbus = (struct sbus_bus *)buscookie;
- struct sbus_iommu *iommu = sbus->iommu;
- unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
- unsigned long imap, iclr;
- int pil, sbus_level = 0;
- pil = sysio_ino_to_pil[ino];
- if (!pil) {
- printk("sbus_irq_build: Bad SYSIO INO[%x]n", ino);
- panic("Bad SYSIO IRQ translations...");
- }
- imap = sysio_irq_offsets[ino];
- if (imap == ((unsigned long)-1)) {
- prom_printf("get_irq_translations: Bad SYSIO INO[%x] cpu[%d]n",
- ino, pil);
- prom_halt();
- }
- imap += reg_base;
- /* SYSIO inconsistancy. For external SLOTS, we have to select
- * the right ICLR register based upon the lower SBUS irq level
- * bits.
- */
- if (ino >= 0x20) {
- iclr = sysio_imap_to_iclr(imap);
- } else {
- int sbus_slot = (ino & 0x18)>>3;
-
- sbus_level = ino & 0x7;
- switch(sbus_slot) {
- case 0:
- iclr = reg_base + SYSIO_ICLR_SLOT0;
- break;
- case 1:
- iclr = reg_base + SYSIO_ICLR_SLOT1;
- break;
- case 2:
- iclr = reg_base + SYSIO_ICLR_SLOT2;
- break;
- default:
- case 3:
- iclr = reg_base + SYSIO_ICLR_SLOT3;
- break;
- };
- iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
- }
- return build_irq(pil, sbus_level, iclr, imap);
- }
- /* Error interrupt handling. */
- #define SYSIO_UE_AFSR 0x0030UL
- #define SYSIO_UE_AFAR 0x0038UL
- #define SYSIO_UEAFSR_PPIO 0x8000000000000000 /* Primary PIO is cause */
- #define SYSIO_UEAFSR_PDRD 0x4000000000000000 /* Primary DVMA read is cause */
- #define SYSIO_UEAFSR_PDWR 0x2000000000000000 /* Primary DVMA write is cause */
- #define SYSIO_UEAFSR_SPIO 0x1000000000000000 /* Secondary PIO is cause */
- #define SYSIO_UEAFSR_SDRD 0x0800000000000000 /* Secondary DVMA read is cause */
- #define SYSIO_UEAFSR_SDWR 0x0400000000000000 /* Secondary DVMA write is cause*/
- #define SYSIO_UEAFSR_RESV1 0x03ff000000000000 /* Reserved */
- #define SYSIO_UEAFSR_DOFF 0x0000e00000000000 /* Doubleword Offset */
- #define SYSIO_UEAFSR_SIZE 0x00001c0000000000 /* Bad transfer size is 2**SIZE */
- #define SYSIO_UEAFSR_MID 0x000003e000000000 /* UPA MID causing the fault */
- #define SYSIO_UEAFSR_RESV2 0x0000001fffffffff /* Reserved */
- static void sysio_ue_handler(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct sbus_bus *sbus = dev_id;
- struct sbus_iommu *iommu = sbus->iommu;
- unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
- unsigned long afsr_reg, afar_reg;
- unsigned long afsr, afar, error_bits;
- int reported;
- afsr_reg = reg_base + SYSIO_UE_AFSR;
- afar_reg = reg_base + SYSIO_UE_AFAR;
- /* Latch error status. */
- afsr = upa_readq(afsr_reg);
- afar = upa_readq(afar_reg);
- /* Clear primary/secondary error status bits. */
- error_bits = afsr &
- (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
- SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
- upa_writeq(error_bits, afsr_reg);
- /* Log the error. */
- printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]n",
- sbus->portid,
- (((error_bits & SYSIO_UEAFSR_PPIO) ?
- "PIO" :
- ((error_bits & SYSIO_UEAFSR_PDRD) ?
- "DVMA Read" :
- ((error_bits & SYSIO_UEAFSR_PDWR) ?
- "DVMA Write" : "???")))));
- printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]n",
- sbus->portid,
- (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
- (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
- (afsr & SYSIO_UEAFSR_MID) >> 37UL);
- printk("SYSIO[%x]: AFAR[%016lx]n", sbus->portid, afar);
- printk("SYSIO[%x]: Secondary UE errors [", sbus->portid);
- reported = 0;
- if (afsr & SYSIO_UEAFSR_SPIO) {
- reported++;
- printk("(PIO)");
- }
- if (afsr & SYSIO_UEAFSR_SDRD) {
- reported++;
- printk("(DVMA Read)");
- }
- if (afsr & SYSIO_UEAFSR_SDWR) {
- reported++;
- printk("(DVMA Write)");
- }
- if (!reported)
- printk("(none)");
- printk("]n");
- }
- #define SYSIO_CE_AFSR 0x0040UL
- #define SYSIO_CE_AFAR 0x0048UL
- #define SYSIO_CEAFSR_PPIO 0x8000000000000000 /* Primary PIO is cause */
- #define SYSIO_CEAFSR_PDRD 0x4000000000000000 /* Primary DVMA read is cause */
- #define SYSIO_CEAFSR_PDWR 0x2000000000000000 /* Primary DVMA write is cause */
- #define SYSIO_CEAFSR_SPIO 0x1000000000000000 /* Secondary PIO is cause */
- #define SYSIO_CEAFSR_SDRD 0x0800000000000000 /* Secondary DVMA read is cause */
- #define SYSIO_CEAFSR_SDWR 0x0400000000000000 /* Secondary DVMA write is cause*/
- #define SYSIO_CEAFSR_RESV1 0x0300000000000000 /* Reserved */
- #define SYSIO_CEAFSR_ESYND 0x00ff000000000000 /* Syndrome Bits */
- #define SYSIO_CEAFSR_DOFF 0x0000e00000000000 /* Double Offset */
- #define SYSIO_CEAFSR_SIZE 0x00001c0000000000 /* Bad transfer size is 2**SIZE */
- #define SYSIO_CEAFSR_MID 0x000003e000000000 /* UPA MID causing the fault */
- #define SYSIO_CEAFSR_RESV2 0x0000001fffffffff /* Reserved */
- static void sysio_ce_handler(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct sbus_bus *sbus = dev_id;
- struct sbus_iommu *iommu = sbus->iommu;
- unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
- unsigned long afsr_reg, afar_reg;
- unsigned long afsr, afar, error_bits;
- int reported;
- afsr_reg = reg_base + SYSIO_CE_AFSR;
- afar_reg = reg_base + SYSIO_CE_AFAR;
- /* Latch error status. */
- afsr = upa_readq(afsr_reg);
- afar = upa_readq(afar_reg);
- /* Clear primary/secondary error status bits. */
- error_bits = afsr &
- (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
- SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
- upa_writeq(error_bits, afsr_reg);
- printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]n",
- sbus->portid,
- (((error_bits & SYSIO_CEAFSR_PPIO) ?
- "PIO" :
- ((error_bits & SYSIO_CEAFSR_PDRD) ?
- "DVMA Read" :
- ((error_bits & SYSIO_CEAFSR_PDWR) ?
- "DVMA Write" : "???")))));
- /* XXX Use syndrome and afar to print out module string just like
- * XXX UDB CE trap handler does... -DaveM
- */
- printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]n",
- sbus->portid,
- (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
- (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
- (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
- (afsr & SYSIO_CEAFSR_MID) >> 37UL);
- printk("SYSIO[%x]: AFAR[%016lx]n", sbus->portid, afar);
- printk("SYSIO[%x]: Secondary CE errors [", sbus->portid);
- reported = 0;
- if (afsr & SYSIO_CEAFSR_SPIO) {
- reported++;
- printk("(PIO)");
- }
- if (afsr & SYSIO_CEAFSR_SDRD) {
- reported++;
- printk("(DVMA Read)");
- }
- if (afsr & SYSIO_CEAFSR_SDWR) {
- reported++;
- printk("(DVMA Write)");
- }
- if (!reported)
- printk("(none)");
- printk("]n");
- }
- #define SYSIO_SBUS_AFSR 0x2010UL
- #define SYSIO_SBUS_AFAR 0x2018UL
- #define SYSIO_SBAFSR_PLE 0x8000000000000000 /* Primary Late PIO Error */
- #define SYSIO_SBAFSR_PTO 0x4000000000000000 /* Primary SBUS Timeout */
- #define SYSIO_SBAFSR_PBERR 0x2000000000000000 /* Primary SBUS Error ACK */
- #define SYSIO_SBAFSR_SLE 0x1000000000000000 /* Secondary Late PIO Error */
- #define SYSIO_SBAFSR_STO 0x0800000000000000 /* Secondary SBUS Timeout */
- #define SYSIO_SBAFSR_SBERR 0x0400000000000000 /* Secondary SBUS Error ACK */
- #define SYSIO_SBAFSR_RESV1 0x03ff000000000000 /* Reserved */
- #define SYSIO_SBAFSR_RD 0x0000800000000000 /* Primary was late PIO read */
- #define SYSIO_SBAFSR_RESV2 0x0000600000000000 /* Reserved */
- #define SYSIO_SBAFSR_SIZE 0x00001c0000000000 /* Size of transfer */
- #define SYSIO_SBAFSR_MID 0x000003e000000000 /* MID causing the error */
- #define SYSIO_SBAFSR_RESV3 0x0000001fffffffff /* Reserved */
- static void sysio_sbus_error_handler(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct sbus_bus *sbus = dev_id;
- struct sbus_iommu *iommu = sbus->iommu;
- unsigned long afsr_reg, afar_reg, reg_base;
- unsigned long afsr, afar, error_bits;
- int reported;
- reg_base = iommu->sbus_control_reg - 0x2000UL;
- afsr_reg = reg_base + SYSIO_SBUS_AFSR;
- afar_reg = reg_base + SYSIO_SBUS_AFAR;
- afsr = upa_readq(afsr_reg);
- afar = upa_readq(afar_reg);
- /* Clear primary/secondary error status bits. */
- error_bits = afsr &
- (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
- SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
- upa_writeq(error_bits, afsr_reg);
- /* Log the error. */
- printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)n",
- sbus->portid,
- (((error_bits & SYSIO_SBAFSR_PLE) ?
- "Late PIO Error" :
- ((error_bits & SYSIO_SBAFSR_PTO) ?
- "Time Out" :
- ((error_bits & SYSIO_SBAFSR_PBERR) ?
- "Error Ack" : "???")))),
- (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
- printk("SYSIO[%x]: size[%lx] MID[%lx]n",
- sbus->portid,
- (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
- (afsr & SYSIO_SBAFSR_MID) >> 37UL);
- printk("SYSIO[%x]: AFAR[%016lx]n", sbus->portid, afar);
- printk("SYSIO[%x]: Secondary SBUS errors [", sbus->portid);
- reported = 0;
- if (afsr & SYSIO_SBAFSR_SLE) {
- reported++;
- printk("(Late PIO Error)");
- }
- if (afsr & SYSIO_SBAFSR_STO) {
- reported++;
- printk("(Time Out)");
- }
- if (afsr & SYSIO_SBAFSR_SBERR) {
- reported++;
- printk("(Error Ack)");
- }
- if (!reported)
- printk("(none)");
- printk("]n");
- /* XXX check iommu/strbuf for further error status XXX */
- }
- #define ECC_CONTROL 0x0020UL
- #define SYSIO_ECNTRL_ECCEN 0x8000000000000000 /* Enable ECC Checking */
- #define SYSIO_ECNTRL_UEEN 0x4000000000000000 /* Enable UE Interrupts */
- #define SYSIO_ECNTRL_CEEN 0x2000000000000000 /* Enable CE Interrupts */
- #define SYSIO_UE_INO 0x34
- #define SYSIO_CE_INO 0x35
- #define SYSIO_SBUSERR_INO 0x36
- static void __init sysio_register_error_handlers(struct sbus_bus *sbus)
- {
- struct sbus_iommu *iommu = sbus->iommu;
- unsigned long reg_base = iommu->sbus_control_reg - 0x2000UL;
- unsigned int irq;
- u64 control;
- irq = sbus_build_irq(sbus, SYSIO_UE_INO);
- if (request_irq(irq, sysio_ue_handler,
- SA_SHIRQ, "SYSIO UE", sbus) < 0) {
- prom_printf("SYSIO[%x]: Cannot register UE interrupt.n",
- sbus->portid);
- prom_halt();
- }
- irq = sbus_build_irq(sbus, SYSIO_CE_INO);
- if (request_irq(irq, sysio_ce_handler,
- SA_SHIRQ, "SYSIO CE", sbus) < 0) {
- prom_printf("SYSIO[%x]: Cannot register CE interrupt.n",
- sbus->portid);
- prom_halt();
- }
- irq = sbus_build_irq(sbus, SYSIO_SBUSERR_INO);
- if (request_irq(irq, sysio_sbus_error_handler,
- SA_SHIRQ, "SYSIO SBUS Error", sbus) < 0) {
- prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.n",
- sbus->portid);
- prom_halt();
- }
- /* Now turn the error interrupts on and also enable ECC checking. */
- upa_writeq((SYSIO_ECNTRL_ECCEN |
- SYSIO_ECNTRL_UEEN |
- SYSIO_ECNTRL_CEEN),
- reg_base + ECC_CONTROL);
- control = upa_readq(iommu->sbus_control_reg);
- control |= 0x100UL; /* SBUS Error Interrupt Enable */
- upa_writeq(control, iommu->sbus_control_reg);
- }
- /* Boot time initialization. */
- void __init sbus_iommu_init(int prom_node, struct sbus_bus *sbus)
- {
- struct linux_prom64_registers rprop;
- struct sbus_iommu *iommu;
- unsigned long regs, tsb_base;
- u64 control;
- int err, i;
- sbus->portid = prom_getintdefault(sbus->prom_node,
- "upa-portid", -1);
- err = prom_getproperty(prom_node, "reg",
- (char *)&rprop, sizeof(rprop));
- if (err < 0) {
- prom_printf("sbus_iommu_init: Cannot map SYSIO control registers.n");
- prom_halt();
- }
- regs = rprop.phys_addr;
- iommu = kmalloc(sizeof(*iommu) + SMP_CACHE_BYTES, GFP_ATOMIC);
- if (iommu == NULL) {
- prom_printf("sbus_iommu_init: Fatal error, kmalloc(iommu) failedn");
- prom_halt();
- }
- /* Align on E$ line boundry. */
- iommu = (struct sbus_iommu *)
- (((unsigned long)iommu + (SMP_CACHE_BYTES - 1UL)) &
- ~(SMP_CACHE_BYTES - 1UL));
- memset(iommu, 0, sizeof(*iommu));
- /* We start with no consistent mappings. */
- iommu->lowest_consistent_map = CLUSTER_NPAGES;
- for (i = 0; i < NCLUSTERS; i++) {
- iommu->alloc_info[i].flush = 0;
- iommu->alloc_info[i].next = 0;
- }
- /* Setup spinlock. */
- spin_lock_init(&iommu->lock);
- /* Init register offsets. */
- iommu->iommu_regs = regs + SYSIO_IOMMUREG_BASE;
- iommu->strbuf_regs = regs + SYSIO_STRBUFREG_BASE;
- /* The SYSIO SBUS control register is used for dummy reads
- * in order to ensure write completion.
- */
- iommu->sbus_control_reg = regs + 0x2000UL;
- /* Link into SYSIO software state. */
- sbus->iommu = iommu;
- printk("SYSIO: UPA portID %x, at %016lxn",
- sbus->portid, regs);
- /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
- control = upa_readq(iommu->iommu_regs + IOMMU_CONTROL);
- control = ((7UL << 16UL) |
- (0UL << 2UL) |
- (1UL << 1UL) |
- (1UL << 0UL));
- /* Using the above configuration we need 1MB iommu page
- * table (128K ioptes * 8 bytes per iopte). This is
- * page order 7 on UltraSparc.
- */
- tsb_base = __get_free_pages(GFP_ATOMIC, get_order(IO_TSB_SIZE));
- if (tsb_base == 0UL) {
- prom_printf("sbus_iommu_init: Fatal error, cannot alloc TSB table.n");
- prom_halt();
- }
- iommu->page_table = (iopte_t *) tsb_base;
- memset(iommu->page_table, 0, IO_TSB_SIZE);
- upa_writeq(control, iommu->iommu_regs + IOMMU_CONTROL);
- /* Clean out any cruft in the IOMMU using
- * diagnostic accesses.
- */
- for (i = 0; i < 16; i++) {
- unsigned long dram = iommu->iommu_regs + IOMMU_DRAMDIAG;
- unsigned long tag = iommu->iommu_regs + IOMMU_TAGDIAG;
- dram += (unsigned long)i * 8UL;
- tag += (unsigned long)i * 8UL;
- upa_writeq(0, dram);
- upa_writeq(0, tag);
- }
- upa_readq(iommu->sbus_control_reg);
- /* Give the TSB to SYSIO. */
- upa_writeq(__pa(tsb_base), iommu->iommu_regs + IOMMU_TSBBASE);
- /* Setup streaming buffer, DE=1 SB_EN=1 */
- control = (1UL << 1UL) | (1UL << 0UL);
- upa_writeq(control, iommu->strbuf_regs + STRBUF_CONTROL);
- /* Clear out the tags using diagnostics. */
- for (i = 0; i < 16; i++) {
- unsigned long ptag, ltag;
- ptag = iommu->strbuf_regs + STRBUF_PTAGDIAG;
- ltag = iommu->strbuf_regs + STRBUF_LTAGDIAG;
- ptag += (unsigned long)i * 8UL;
- ltag += (unsigned long)i * 8UL;
- upa_writeq(0UL, ptag);
- upa_writeq(0UL, ltag);
- }
- /* Enable DVMA arbitration for all devices/slots. */
- control = upa_readq(iommu->sbus_control_reg);
- control |= 0x3fUL;
- upa_writeq(control, iommu->sbus_control_reg);
- /* Now some Xfire specific grot... */
- if (this_is_starfire)
- sbus->starfire_cookie = starfire_hookup(sbus->portid);
- else
- sbus->starfire_cookie = NULL;
- sysio_register_error_handlers(sbus);
- }