1 /* pci_sun4v.c: SUN4V specific PCI controller support.
3 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
6 #include <linux/kernel.h>
7 #include <linux/types.h>
9 #include <linux/init.h>
10 #include <linux/slab.h>
11 #include <linux/interrupt.h>
12 #include <linux/percpu.h>
15 #include <asm/iommu.h>
18 #include <asm/pstate.h>
19 #include <asm/oplib.h>
20 #include <asm/hypervisor.h>
23 #include "iommu_common.h"
25 #include "pci_sun4v.h"
27 #define PGLIST_NENTS 2048
30 u64 pglist[PGLIST_NENTS];
33 static DEFINE_PER_CPU(struct sun4v_pglist, iommu_pglists);
35 static long pci_arena_alloc(struct pci_iommu_arena *arena, unsigned long npages)
37 unsigned long n, i, start, end, limit;
45 n = find_next_zero_bit(arena->map, limit, start);
47 if (unlikely(end >= limit)) {
48 if (likely(pass < 1)) {
54 /* Scanned the whole thing, give up. */
59 for (i = n; i < end; i++) {
60 if (test_bit(i, arena->map)) {
66 for (i = n; i < end; i++)
67 __set_bit(i, arena->map);
74 static void pci_arena_free(struct pci_iommu_arena *arena, unsigned long base, unsigned long npages)
78 for (i = base; i < (base + npages); i++)
79 __clear_bit(i, arena->map);
82 static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp)
84 struct pcidev_cookie *pcp;
85 struct pci_iommu *iommu;
86 unsigned long devhandle, flags, order, first_page, npages, n;
92 size = IO_PAGE_ALIGN(size);
93 order = get_order(size);
94 if (order >= MAX_ORDER)
97 npages = size >> IO_PAGE_SHIFT;
98 if (npages > PGLIST_NENTS)
101 first_page = __get_free_pages(GFP_ATOMIC, order);
102 if (first_page == 0UL)
104 memset((char *)first_page, 0, PAGE_SIZE << order);
107 devhandle = pcp->pbm->devhandle;
108 iommu = pcp->pbm->iommu;
110 spin_lock_irqsave(&iommu->lock, flags);
111 entry = pci_arena_alloc(&iommu->arena, npages);
112 spin_unlock_irqrestore(&iommu->lock, flags);
114 if (unlikely(entry < 0L)) {
115 free_pages(first_page, order);
119 *dma_addrp = (iommu->page_table_map_base +
120 (entry << IO_PAGE_SHIFT));
121 ret = (void *) first_page;
122 first_page = __pa(first_page);
126 pglist = &__get_cpu_var(iommu_pglists).pglist[0];
127 for (n = 0; n < npages; n++)
128 pglist[n] = first_page + (n * PAGE_SIZE);
133 num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry),
135 (HV_PCI_MAP_ATTR_READ |
136 HV_PCI_MAP_ATTR_WRITE),
141 } while (npages != 0);
148 static void pci_4v_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_t dvma)
150 struct pcidev_cookie *pcp;
151 struct pci_iommu *iommu;
152 unsigned long flags, order, npages, entry, devhandle;
154 npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT;
156 iommu = pcp->pbm->iommu;
157 devhandle = pcp->pbm->devhandle;
158 entry = ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
160 spin_lock_irqsave(&iommu->lock, flags);
162 pci_arena_free(&iommu->arena, entry, npages);
167 num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry),
171 } while (npages != 0);
173 spin_unlock_irqrestore(&iommu->lock, flags);
175 order = get_order(size);
177 free_pages((unsigned long)cpu, order);
180 static dma_addr_t pci_4v_map_single(struct pci_dev *pdev, void *ptr, size_t sz, int direction)
182 struct pcidev_cookie *pcp;
183 struct pci_iommu *iommu;
184 unsigned long flags, npages, oaddr;
185 unsigned long i, base_paddr, devhandle;
193 iommu = pcp->pbm->iommu;
194 devhandle = pcp->pbm->devhandle;
196 if (unlikely(direction == PCI_DMA_NONE))
199 oaddr = (unsigned long)ptr;
200 npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK);
201 npages >>= IO_PAGE_SHIFT;
202 if (unlikely(npages > PGLIST_NENTS))
205 spin_lock_irqsave(&iommu->lock, flags);
206 entry = pci_arena_alloc(&iommu->arena, npages);
207 spin_unlock_irqrestore(&iommu->lock, flags);
209 if (unlikely(entry < 0L))
212 bus_addr = (iommu->page_table_map_base +
213 (entry << IO_PAGE_SHIFT));
214 ret = bus_addr | (oaddr & ~IO_PAGE_MASK);
215 base_paddr = __pa(oaddr & IO_PAGE_MASK);
216 prot = HV_PCI_MAP_ATTR_READ;
217 if (direction != PCI_DMA_TODEVICE)
218 prot |= HV_PCI_MAP_ATTR_WRITE;
222 pglist = &__get_cpu_var(iommu_pglists).pglist[0];
223 for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE)
224 pglist[i] = base_paddr;
229 num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry),
235 } while (npages != 0);
242 if (printk_ratelimit())
244 return PCI_DMA_ERROR_CODE;
247 static void pci_4v_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction)
249 struct pcidev_cookie *pcp;
250 struct pci_iommu *iommu;
251 unsigned long flags, npages, devhandle;
254 if (unlikely(direction == PCI_DMA_NONE)) {
255 if (printk_ratelimit())
261 iommu = pcp->pbm->iommu;
262 devhandle = pcp->pbm->devhandle;
264 npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK);
265 npages >>= IO_PAGE_SHIFT;
266 bus_addr &= IO_PAGE_MASK;
268 spin_lock_irqsave(&iommu->lock, flags);
270 entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT;
271 pci_arena_free(&iommu->arena, entry, npages);
276 num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry),
280 } while (npages != 0);
282 spin_unlock_irqrestore(&iommu->lock, flags);
285 #define SG_ENT_PHYS_ADDRESS(SG) \
286 (__pa(page_address((SG)->page)) + (SG)->offset)
288 static inline void fill_sg(long entry, unsigned long devhandle,
289 struct scatterlist *sg,
290 int nused, int nelems, unsigned long prot)
292 struct scatterlist *dma_sg = sg;
293 struct scatterlist *sg_end = sg + nelems;
294 int i, cpu, pglist_ent;
298 pglist = &__get_cpu_var(iommu_pglists).pglist[0];
300 for (i = 0; i < nused; i++) {
301 unsigned long pteval = ~0UL;
304 dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) +
306 ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT;
308 unsigned long offset;
311 /* If we are here, we know we have at least one
312 * more page to map. So walk forward until we
313 * hit a page crossing, and begin creating new
314 * mappings from that spot.
319 tmp = SG_ENT_PHYS_ADDRESS(sg);
321 if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) {
322 pteval = tmp & IO_PAGE_MASK;
323 offset = tmp & (IO_PAGE_SIZE - 1UL);
326 if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) {
327 pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK;
329 len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL)));
335 pteval = (pteval & IOPTE_PAGE);
337 pglist[pglist_ent++] = pteval;
338 pteval += IO_PAGE_SIZE;
339 len -= (IO_PAGE_SIZE - offset);
344 pteval = (pteval & IOPTE_PAGE) + len;
347 /* Skip over any tail mappings we've fully mapped,
348 * adjusting pteval along the way. Stop when we
349 * detect a page crossing event.
351 while (sg < sg_end &&
352 (pteval << (64 - IO_PAGE_SHIFT)) != 0UL &&
353 (pteval == SG_ENT_PHYS_ADDRESS(sg)) &&
355 (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) {
356 pteval += sg->length;
359 if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL)
361 } while (dma_npages != 0);
365 BUG_ON(pglist_ent == 0);
370 num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry),
374 } while (pglist_ent != 0);
379 static int pci_4v_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
381 struct pcidev_cookie *pcp;
382 struct pci_iommu *iommu;
383 unsigned long flags, npages, prot, devhandle;
385 struct scatterlist *sgtmp;
389 /* Fast path single entry scatterlists. */
391 sglist->dma_address =
392 pci_4v_map_single(pdev,
393 (page_address(sglist->page) + sglist->offset),
394 sglist->length, direction);
395 if (unlikely(sglist->dma_address == PCI_DMA_ERROR_CODE))
397 sglist->dma_length = sglist->length;
402 iommu = pcp->pbm->iommu;
403 devhandle = pcp->pbm->devhandle;
405 if (unlikely(direction == PCI_DMA_NONE))
408 /* Step 1: Prepare scatter list. */
409 npages = prepare_sg(sglist, nelems);
410 if (unlikely(npages > PGLIST_NENTS))
413 /* Step 2: Allocate a cluster and context, if necessary. */
414 spin_lock_irqsave(&iommu->lock, flags);
415 entry = pci_arena_alloc(&iommu->arena, npages);
416 spin_unlock_irqrestore(&iommu->lock, flags);
418 if (unlikely(entry < 0L))
421 dma_base = iommu->page_table_map_base +
422 (entry << IO_PAGE_SHIFT);
424 /* Step 3: Normalize DMA addresses. */
428 while (used && sgtmp->dma_length) {
429 sgtmp->dma_address += dma_base;
433 used = nelems - used;
435 /* Step 4: Create the mappings. */
436 prot = HV_PCI_MAP_ATTR_READ;
437 if (direction != PCI_DMA_TODEVICE)
438 prot |= HV_PCI_MAP_ATTR_WRITE;
440 fill_sg(entry, devhandle, sglist, used, nelems, prot);
445 if (printk_ratelimit())
450 static void pci_4v_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
452 struct pcidev_cookie *pcp;
453 struct pci_iommu *iommu;
454 unsigned long flags, i, npages, devhandle;
458 if (unlikely(direction == PCI_DMA_NONE)) {
459 if (printk_ratelimit())
464 iommu = pcp->pbm->iommu;
465 devhandle = pcp->pbm->devhandle;
467 bus_addr = sglist->dma_address & IO_PAGE_MASK;
469 for (i = 1; i < nelems; i++)
470 if (sglist[i].dma_length == 0)
473 npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) -
474 bus_addr) >> IO_PAGE_SHIFT;
476 entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT);
478 spin_lock_irqsave(&iommu->lock, flags);
480 pci_arena_free(&iommu->arena, entry, npages);
485 num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry),
489 } while (npages != 0);
491 spin_unlock_irqrestore(&iommu->lock, flags);
494 static void pci_4v_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction)
496 /* Nothing to do... */
499 static void pci_4v_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction)
501 /* Nothing to do... */
504 struct pci_iommu_ops pci_sun4v_iommu_ops = {
505 .alloc_consistent = pci_4v_alloc_consistent,
506 .free_consistent = pci_4v_free_consistent,
507 .map_single = pci_4v_map_single,
508 .unmap_single = pci_4v_unmap_single,
509 .map_sg = pci_4v_map_sg,
510 .unmap_sg = pci_4v_unmap_sg,
511 .dma_sync_single_for_cpu = pci_4v_dma_sync_single_for_cpu,
512 .dma_sync_sg_for_cpu = pci_4v_dma_sync_sg_for_cpu,
515 /* SUN4V PCI configuration space accessors. */
517 static inline int pci_sun4v_out_of_range(struct pci_pbm_info *pbm, unsigned int bus)
519 if (bus < pbm->pci_first_busno ||
520 bus > pbm->pci_last_busno)
525 static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
526 int where, int size, u32 *value)
528 struct pci_pbm_info *pbm = bus_dev->sysdata;
529 u32 devhandle = pbm->devhandle;
530 unsigned int bus = bus_dev->number;
531 unsigned int device = PCI_SLOT(devfn);
532 unsigned int func = PCI_FUNC(devfn);
535 if (pci_sun4v_out_of_range(pbm, bus)) {
538 ret = pci_sun4v_config_get(devhandle,
539 HV_PCI_DEVICE_BUILD(bus, device, func),
542 printk("read_pci_cfg: devh[%x] device[%08x] where[%x] sz[%d] "
544 devhandle, HV_PCI_DEVICE_BUILD(bus, device, func),
553 *value = ret & 0xffff;
556 *value = ret & 0xffffffff;
561 return PCIBIOS_SUCCESSFUL;
564 static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
565 int where, int size, u32 value)
567 struct pci_pbm_info *pbm = bus_dev->sysdata;
568 u32 devhandle = pbm->devhandle;
569 unsigned int bus = bus_dev->number;
570 unsigned int device = PCI_SLOT(devfn);
571 unsigned int func = PCI_FUNC(devfn);
574 if (pci_sun4v_out_of_range(pbm, bus)) {
577 ret = pci_sun4v_config_put(devhandle,
578 HV_PCI_DEVICE_BUILD(bus, device, func),
581 printk("write_pci_cfg: devh[%x] device[%08x] where[%x] sz[%d] "
582 "val[%08x] == [%016lx]\n",
583 devhandle, HV_PCI_DEVICE_BUILD(bus, device, func),
584 where, size, value, ret);
587 return PCIBIOS_SUCCESSFUL;
590 static struct pci_ops pci_sun4v_ops = {
591 .read = pci_sun4v_read_pci_cfg,
592 .write = pci_sun4v_write_pci_cfg,
596 static void pbm_scan_bus(struct pci_controller_info *p,
597 struct pci_pbm_info *pbm)
599 struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL);
602 prom_printf("%s: Critical allocation failure.\n", pbm->name);
606 /* All we care about is the PBM. */
607 memset(cookie, 0, sizeof(*cookie));
610 pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno,
614 pci_fixup_host_bridge_self(pbm->pci_bus);
615 pbm->pci_bus->self->sysdata = cookie;
618 pci_fill_in_pbm_cookies(pbm->pci_bus, pbm,
619 prom_getchild(pbm->prom_node));
620 pci_record_assignments(pbm, pbm->pci_bus);
621 pci_assign_unassigned(pbm, pbm->pci_bus);
622 pci_fixup_irq(pbm, pbm->pci_bus);
623 pci_determine_66mhz_disposition(pbm, pbm->pci_bus);
624 pci_setup_busmastering(pbm, pbm->pci_bus);
627 static void pci_sun4v_scan_bus(struct pci_controller_info *p)
629 if (p->pbm_A.prom_node) {
630 p->pbm_A.is_66mhz_capable =
631 prom_getbool(p->pbm_A.prom_node, "66mhz-capable");
633 pbm_scan_bus(p, &p->pbm_A);
635 if (p->pbm_B.prom_node) {
636 p->pbm_B.is_66mhz_capable =
637 prom_getbool(p->pbm_B.prom_node, "66mhz-capable");
639 pbm_scan_bus(p, &p->pbm_B);
642 /* XXX register error interrupt handlers XXX */
645 static unsigned int pci_sun4v_irq_build(struct pci_pbm_info *pbm,
646 struct pci_dev *pdev,
649 struct ino_bucket *bucket;
650 unsigned long sysino;
651 u32 devhandle = pbm->devhandle;
654 sysino = sun4v_devino_to_sysino(devhandle, ino);
656 printk(KERN_INFO "pci_irq_buld: Mapping ( devh[%08x] ino[%08x] ) "
657 "--> sysino[%016lx]\n", devhandle, ino, sysino);
661 switch ((pdev->class >> 16) & 0xff) {
662 case PCI_BASE_CLASS_STORAGE:
666 case PCI_BASE_CLASS_NETWORK:
670 case PCI_BASE_CLASS_DISPLAY:
674 case PCI_BASE_CLASS_MULTIMEDIA:
675 case PCI_BASE_CLASS_MEMORY:
676 case PCI_BASE_CLASS_BRIDGE:
677 case PCI_BASE_CLASS_SERIAL:
686 BUG_ON(PIL_RESERVED(pil));
688 bucket = &ivector_table[sysino];
690 /* Catch accidental accesses to these things. IMAP/ICLR handling
691 * is done by hypervisor calls on sun4v platforms, not by direct
698 bucket->flags = IBF_PCI;
700 bucket->irq_info = kmalloc(sizeof(struct irq_desc), GFP_ATOMIC);
701 if (!bucket->irq_info) {
702 prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n");
705 memset(bucket->irq_info, 0, sizeof(struct irq_desc));
707 return __irq(bucket);
710 static void pci_sun4v_base_address_update(struct pci_dev *pdev, int resource)
712 struct pcidev_cookie *pcp = pdev->sysdata;
713 struct pci_pbm_info *pbm = pcp->pbm;
714 struct resource *res, *root;
716 int where, size, is_64bit;
718 res = &pdev->resource[resource];
720 where = PCI_BASE_ADDRESS_0 + (resource * 4);
721 } else if (resource == PCI_ROM_RESOURCE) {
722 where = pdev->rom_base_reg;
724 /* Somebody might have asked allocation of a non-standard resource */
728 /* XXX 64-bit MEM handling is not %100 correct... XXX */
730 if (res->flags & IORESOURCE_IO)
731 root = &pbm->io_space;
733 root = &pbm->mem_space;
734 if ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK)
735 == PCI_BASE_ADDRESS_MEM_TYPE_64)
739 size = res->end - res->start;
740 pci_read_config_dword(pdev, where, ®);
741 reg = ((reg & size) |
742 (((u32)(res->start - root->start)) & ~size));
743 if (resource == PCI_ROM_RESOURCE) {
744 reg |= PCI_ROM_ADDRESS_ENABLE;
745 res->flags |= IORESOURCE_ROM_ENABLE;
747 pci_write_config_dword(pdev, where, reg);
749 /* This knows that the upper 32-bits of the address
750 * must be zero. Our PCI common layer enforces this.
753 pci_write_config_dword(pdev, where + 4, 0);
756 static void pci_sun4v_resource_adjust(struct pci_dev *pdev,
757 struct resource *res,
758 struct resource *root)
760 res->start += root->start;
761 res->end += root->start;
764 /* Use ranges property to determine where PCI MEM, I/O, and Config
765 * space are for this PCI bus module.
767 static void pci_sun4v_determine_mem_io_space(struct pci_pbm_info *pbm)
769 int i, saw_mem, saw_io;
771 saw_mem = saw_io = 0;
772 for (i = 0; i < pbm->num_pbm_ranges; i++) {
773 struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i];
777 type = (pr->child_phys_hi >> 24) & 0x3;
778 a = (((unsigned long)pr->parent_phys_hi << 32UL) |
779 ((unsigned long)pr->parent_phys_lo << 0UL));
783 /* 16-bit IO space, 16MB */
784 pbm->io_space.start = a;
785 pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL);
786 pbm->io_space.flags = IORESOURCE_IO;
791 /* 32-bit MEM space, 2GB */
792 pbm->mem_space.start = a;
793 pbm->mem_space.end = a + (0x80000000UL - 1UL);
794 pbm->mem_space.flags = IORESOURCE_MEM;
799 /* XXX 64-bit MEM handling XXX */
806 if (!saw_io || !saw_mem) {
807 prom_printf("%s: Fatal error, missing %s PBM range.\n",
809 (!saw_io ? "IO" : "MEM"));
813 printk("%s: PCI IO[%lx] MEM[%lx]\n",
816 pbm->mem_space.start);
819 static void pbm_register_toplevel_resources(struct pci_controller_info *p,
820 struct pci_pbm_info *pbm)
822 pbm->io_space.name = pbm->mem_space.name = pbm->name;
824 request_resource(&ioport_resource, &pbm->io_space);
825 request_resource(&iomem_resource, &pbm->mem_space);
826 pci_register_legacy_regions(&pbm->io_space,
830 static void probe_existing_entries(struct pci_pbm_info *pbm,
831 struct pci_iommu *iommu)
833 struct pci_iommu_arena *arena = &iommu->arena;
834 unsigned long i, devhandle;
836 devhandle = pbm->devhandle;
837 for (i = 0; i < arena->limit; i++) {
838 unsigned long ret, io_attrs, ra;
840 ret = pci_sun4v_iommu_getmap(devhandle,
844 __set_bit(i, arena->map);
848 static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm)
850 struct pci_iommu *iommu = pbm->iommu;
851 unsigned long num_tsb_entries, sz;
852 u32 vdma[2], dma_mask, dma_offset;
855 err = prom_getproperty(pbm->prom_node, "virtual-dma",
856 (char *)&vdma[0], sizeof(vdma));
857 if (err == 0 || err == -1) {
858 /* No property, use default values. */
859 vdma[0] = 0x80000000;
860 vdma[1] = 0x80000000;
866 dma_mask |= 0x1fffffff;
871 dma_mask |= 0x3fffffff;
876 dma_mask |= 0x7fffffff;
881 prom_printf("PCI-SUN4V: strange virtual-dma size.\n");
885 num_tsb_entries = tsbsize / sizeof(iopte_t);
887 dma_offset = vdma[0];
889 /* Setup initial software IOMMU state. */
890 spin_lock_init(&iommu->lock);
891 iommu->ctx_lowest_free = 1;
892 iommu->page_table_map_base = dma_offset;
893 iommu->dma_addr_mask = dma_mask;
895 /* Allocate and initialize the free area map. */
896 sz = num_tsb_entries / 8;
897 sz = (sz + 7UL) & ~7UL;
898 iommu->arena.map = kmalloc(sz, GFP_KERNEL);
899 if (!iommu->arena.map) {
900 prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n");
903 memset(iommu->arena.map, 0, sz);
904 iommu->arena.limit = num_tsb_entries;
906 probe_existing_entries(pbm, iommu);
909 /* Don't get this from the root nexus, get it from the "pci@0" node below. */
910 static void pci_sun4v_get_bus_range(struct pci_pbm_info *pbm)
912 unsigned int busrange[2];
913 int prom_node = pbm->prom_node;
916 prom_node = prom_getchild(prom_node);
917 if (prom_node == 0) {
918 prom_printf("%s: Fatal error, no child OBP node.\n", pbm->name);
922 err = prom_getproperty(prom_node, "bus-range",
923 (char *)&busrange[0],
925 if (err == 0 || err == -1) {
926 prom_printf("%s: Fatal error, no bus-range.\n", pbm->name);
930 pbm->pci_first_busno = busrange[0];
931 pbm->pci_last_busno = busrange[1];
935 static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node, unsigned int devhandle)
937 struct pci_pbm_info *pbm;
940 if (devhandle & 0x40)
946 pbm->prom_node = prom_node;
947 pbm->pci_first_slot = 1;
949 pbm->devhandle = devhandle;
951 sprintf(pbm->name, "SUN4V-PCI%d PBM%c",
952 p->index, (pbm == &p->pbm_A ? 'A' : 'B'));
954 printk("%s: devhandle[%x]\n", pbm->name, pbm->devhandle);
956 prom_getstring(prom_node, "name",
957 pbm->prom_name, sizeof(pbm->prom_name));
959 err = prom_getproperty(prom_node, "ranges",
960 (char *) pbm->pbm_ranges,
961 sizeof(pbm->pbm_ranges));
962 if (err == 0 || err == -1) {
963 prom_printf("%s: Fatal error, no ranges property.\n",
968 pbm->num_pbm_ranges =
969 (err / sizeof(struct linux_prom_pci_ranges));
971 /* Mask out the top 8 bits of the ranges, leaving the real
974 for (i = 0; i < pbm->num_pbm_ranges; i++)
975 pbm->pbm_ranges[i].parent_phys_hi &= 0x0fffffff;
977 pci_sun4v_determine_mem_io_space(pbm);
978 pbm_register_toplevel_resources(p, pbm);
980 err = prom_getproperty(prom_node, "interrupt-map",
981 (char *)pbm->pbm_intmap,
982 sizeof(pbm->pbm_intmap));
984 pbm->num_pbm_intmap = (err / sizeof(struct linux_prom_pci_intmap));
985 err = prom_getproperty(prom_node, "interrupt-map-mask",
986 (char *)&pbm->pbm_intmask,
987 sizeof(pbm->pbm_intmask));
989 prom_printf("%s: Fatal error, no "
990 "interrupt-map-mask.\n", pbm->name);
994 pbm->num_pbm_intmap = 0;
995 memset(&pbm->pbm_intmask, 0, sizeof(pbm->pbm_intmask));
998 pci_sun4v_get_bus_range(pbm);
999 pci_sun4v_iommu_init(pbm);
1002 void sun4v_pci_init(int node, char *model_name)
1004 struct pci_controller_info *p;
1005 struct pci_iommu *iommu;
1006 struct linux_prom64_registers regs;
1007 unsigned int devhandle;
1009 prom_getproperty(node, "reg", (char *)®s, sizeof(regs));
1010 devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff;;
1012 for (p = pci_controller_root; p; p = p->next) {
1013 struct pci_pbm_info *pbm;
1015 if (p->pbm_A.prom_node && p->pbm_B.prom_node)
1018 pbm = (p->pbm_A.prom_node ?
1022 if (pbm->devhandle == (devhandle ^ 0x40)) {
1023 pci_sun4v_pbm_init(p, node, devhandle);
1028 p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
1030 prom_printf("SUN4V_PCI: Fatal memory allocation error.\n");
1033 memset(p, 0, sizeof(*p));
1035 iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
1037 prom_printf("SCHIZO: Fatal memory allocation error.\n");
1040 memset(iommu, 0, sizeof(*iommu));
1041 p->pbm_A.iommu = iommu;
1043 iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC);
1045 prom_printf("SCHIZO: Fatal memory allocation error.\n");
1048 memset(iommu, 0, sizeof(*iommu));
1049 p->pbm_B.iommu = iommu;
1051 p->next = pci_controller_root;
1052 pci_controller_root = p;
1054 p->index = pci_num_controllers++;
1055 p->pbms_same_domain = 0;
1057 p->scan_bus = pci_sun4v_scan_bus;
1058 p->irq_build = pci_sun4v_irq_build;
1059 p->base_address_update = pci_sun4v_base_address_update;
1060 p->resource_adjust = pci_sun4v_resource_adjust;
1061 p->pci_ops = &pci_sun4v_ops;
1063 /* Like PSYCHO and SCHIZO we have a 2GB aligned area
1066 pci_memspace_mask = 0x7fffffffUL;
1068 pci_sun4v_pbm_init(p, node, devhandle);