diff options
Diffstat (limited to 'arch/sparc64/kernel/pci_sun4v.c')
| -rw-r--r-- | arch/sparc64/kernel/pci_sun4v.c | 1032 |
1 files changed, 0 insertions, 1032 deletions
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c deleted file mode 100644 index e86c73ec167..00000000000 --- a/arch/sparc64/kernel/pci_sun4v.c +++ /dev/null @@ -1,1032 +0,0 @@ -/* pci_sun4v.c: SUN4V specific PCI controller support. - * - * Copyright (C) 2006, 2007, 2008 David S. Miller (davem@davemloft.net) - */ - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/percpu.h> -#include <linux/irq.h> -#include <linux/msi.h> -#include <linux/log2.h> -#include <linux/of_device.h> - -#include <asm/iommu.h> -#include <asm/irq.h> -#include <asm/hypervisor.h> -#include <asm/prom.h> - -#include "pci_impl.h" -#include "iommu_common.h" - -#include "pci_sun4v.h" - -#define DRIVER_NAME "pci_sun4v" -#define PFX DRIVER_NAME ": " - -static unsigned long vpci_major = 1; -static unsigned long vpci_minor = 1; - -#define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) - -struct iommu_batch { - struct device *dev; /* Device mapping is for. */ - unsigned long prot; /* IOMMU page protections */ - unsigned long entry; /* Index into IOTSB. */ - u64 *pglist; /* List of physical pages */ - unsigned long npages; /* Number of pages in list. */ -}; - -static DEFINE_PER_CPU(struct iommu_batch, iommu_batch); -static int iommu_batch_initialized; - -/* Interrupts must be disabled. */ -static inline void iommu_batch_start(struct device *dev, unsigned long prot, unsigned long entry) -{ - struct iommu_batch *p = &__get_cpu_var(iommu_batch); - - p->dev = dev; - p->prot = prot; - p->entry = entry; - p->npages = 0; -} - -/* Interrupts must be disabled. */ -static long iommu_batch_flush(struct iommu_batch *p) -{ - struct pci_pbm_info *pbm = p->dev->archdata.host_controller; - unsigned long devhandle = pbm->devhandle; - unsigned long prot = p->prot; - unsigned long entry = p->entry; - u64 *pglist = p->pglist; - unsigned long npages = p->npages; - - while (npages != 0) { - long num; - - num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry), - npages, prot, __pa(pglist)); - if (unlikely(num < 0)) { - if (printk_ratelimit()) - printk("iommu_batch_flush: IOMMU map of " - "[%08lx:%08lx:%lx:%lx:%lx] failed with " - "status %ld\n", - devhandle, HV_PCI_TSBID(0, entry), - npages, prot, __pa(pglist), num); - return -1; - } - - entry += num; - npages -= num; - pglist += num; - } - - p->entry = entry; - p->npages = 0; - - return 0; -} - -static inline void iommu_batch_new_entry(unsigned long entry) -{ - struct iommu_batch *p = &__get_cpu_var(iommu_batch); - - if (p->entry + p->npages == entry) - return; - if (p->entry != ~0UL) - iommu_batch_flush(p); - p->entry = entry; -} - -/* Interrupts must be disabled. */ -static inline long iommu_batch_add(u64 phys_page) -{ - struct iommu_batch *p = &__get_cpu_var(iommu_batch); - - BUG_ON(p->npages >= PGLIST_NENTS); - - p->pglist[p->npages++] = phys_page; - if (p->npages == PGLIST_NENTS) - return iommu_batch_flush(p); - - return 0; -} - -/* Interrupts must be disabled. */ -static inline long iommu_batch_end(void) -{ - struct iommu_batch *p = &__get_cpu_var(iommu_batch); - - BUG_ON(p->npages >= PGLIST_NENTS); - - return iommu_batch_flush(p); -} - -static void *dma_4v_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_addrp, gfp_t gfp) -{ - unsigned long flags, order, first_page, npages, n; - struct iommu *iommu; - struct page *page; - void *ret; - long entry; - int nid; - - size = IO_PAGE_ALIGN(size); - order = get_order(size); - if (unlikely(order >= MAX_ORDER)) - return NULL; - - npages = size >> IO_PAGE_SHIFT; - - nid = dev->archdata.numa_node; - page = alloc_pages_node(nid, gfp, order); - if (unlikely(!page)) - return NULL; - - first_page = (unsigned long) page_address(page); - memset((char *)first_page, 0, PAGE_SIZE << order); - - iommu = dev->archdata.iommu; - - spin_lock_irqsave(&iommu->lock, flags); - entry = iommu_range_alloc(dev, iommu, npages, NULL); - spin_unlock_irqrestore(&iommu->lock, flags); - - if (unlikely(entry == DMA_ERROR_CODE)) - goto range_alloc_fail; - - *dma_addrp = (iommu->page_table_map_base + - (entry << IO_PAGE_SHIFT)); - ret = (void *) first_page; - first_page = __pa(first_page); - - local_irq_save(flags); - - iommu_batch_start(dev, - (HV_PCI_MAP_ATTR_READ | - HV_PCI_MAP_ATTR_WRITE), - entry); - - for (n = 0; n < npages; n++) { - long err = iommu_batch_add(first_page + (n * PAGE_SIZE)); - if (unlikely(err < 0L)) - goto iommu_map_fail; - } - - if (unlikely(iommu_batch_end() < 0L)) - goto iommu_map_fail; - - local_irq_restore(flags); - - return ret; - -iommu_map_fail: - /* Interrupts are disabled. */ - spin_lock(&iommu->lock); - iommu_range_free(iommu, *dma_addrp, npages); - spin_unlock_irqrestore(&iommu->lock, flags); - -range_alloc_fail: - free_pages(first_page, order); - return NULL; -} - -static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu, - dma_addr_t dvma) -{ - struct pci_pbm_info *pbm; - struct iommu *iommu; - unsigned long flags, order, npages, entry; - u32 devhandle; - - npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; - iommu = dev->archdata.iommu; - pbm = dev->archdata.host_controller; - devhandle = pbm->devhandle; - entry = ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT); - - spin_lock_irqsave(&iommu->lock, flags); - - iommu_range_free(iommu, dvma, npages); - - do { - unsigned long num; - - num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), - npages); - entry += num; - npages -= num; - } while (npages != 0); - - spin_unlock_irqrestore(&iommu->lock, flags); - - order = get_order(size); - if (order < 10) - free_pages((unsigned long)cpu, order); -} - -static dma_addr_t dma_4v_map_single(struct device *dev, void *ptr, size_t sz, - enum dma_data_direction direction) -{ - struct iommu *iommu; - unsigned long flags, npages, oaddr; - unsigned long i, base_paddr; - u32 bus_addr, ret; - unsigned long prot; - long entry; - - iommu = dev->archdata.iommu; - - if (unlikely(direction == DMA_NONE)) - goto bad; - - oaddr = (unsigned long)ptr; - npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); - npages >>= IO_PAGE_SHIFT; - - spin_lock_irqsave(&iommu->lock, flags); - entry = iommu_range_alloc(dev, iommu, npages, NULL); - spin_unlock_irqrestore(&iommu->lock, flags); - - if (unlikely(entry == DMA_ERROR_CODE)) - goto bad; - - bus_addr = (iommu->page_table_map_base + - (entry << IO_PAGE_SHIFT)); - ret = bus_addr | (oaddr & ~IO_PAGE_MASK); - base_paddr = __pa(oaddr & IO_PAGE_MASK); - prot = HV_PCI_MAP_ATTR_READ; - if (direction != DMA_TO_DEVICE) - prot |= HV_PCI_MAP_ATTR_WRITE; - - local_irq_save(flags); - - iommu_batch_start(dev, prot, entry); - - for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE) { - long err = iommu_batch_add(base_paddr); - if (unlikely(err < 0L)) - goto iommu_map_fail; - } - if (unlikely(iommu_batch_end() < 0L)) - goto iommu_map_fail; - - local_irq_restore(flags); - - return ret; - -bad: - if (printk_ratelimit()) - WARN_ON(1); - return DMA_ERROR_CODE; - -iommu_map_fail: - /* Interrupts are disabled. */ - spin_lock(&iommu->lock); - iommu_range_free(iommu, bus_addr, npages); - spin_unlock_irqrestore(&iommu->lock, flags); - - return DMA_ERROR_CODE; -} - -static void dma_4v_unmap_single(struct device *dev, dma_addr_t bus_addr, - size_t sz, enum dma_data_direction direction) -{ - struct pci_pbm_info *pbm; - struct iommu *iommu; - unsigned long flags, npages; - long entry; - u32 devhandle; - - if (unlikely(direction == DMA_NONE)) { - if (printk_ratelimit()) - WARN_ON(1); - return; - } - - iommu = dev->archdata.iommu; - pbm = dev->archdata.host_controller; - devhandle = pbm->devhandle; - - npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK); - npages >>= IO_PAGE_SHIFT; - bus_addr &= IO_PAGE_MASK; - - spin_lock_irqsave(&iommu->lock, flags); - - iommu_range_free(iommu, bus_addr, npages); - - entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT; - do { - unsigned long num; - - num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), - npages); - entry += num; - npages -= num; - } while (npages != 0); - - spin_unlock_irqrestore(&iommu->lock, flags); -} - -static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - struct scatterlist *s, *outs, *segstart; - unsigned long flags, handle, prot; - dma_addr_t dma_next = 0, dma_addr; - unsigned int max_seg_size; - unsigned long seg_boundary_size; - int outcount, incount, i; - struct iommu *iommu; - unsigned long base_shift; - long err; - - BUG_ON(direction == DMA_NONE); - - iommu = dev->archdata.iommu; - if (nelems == 0 || !iommu) - return 0; - - prot = HV_PCI_MAP_ATTR_READ; - if (direction != DMA_TO_DEVICE) - prot |= HV_PCI_MAP_ATTR_WRITE; - - outs = s = segstart = &sglist[0]; - outcount = 1; - incount = nelems; - handle = 0; - - /* Init first segment length for backout at failure */ - outs->dma_length = 0; - - spin_lock_irqsave(&iommu->lock, flags); - - iommu_batch_start(dev, prot, ~0UL); - - max_seg_size = dma_get_max_seg_size(dev); - seg_boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, - IO_PAGE_SIZE) >> IO_PAGE_SHIFT; - base_shift = iommu->page_table_map_base >> IO_PAGE_SHIFT; - for_each_sg(sglist, s, nelems, i) { - unsigned long paddr, npages, entry, out_entry = 0, slen; - - slen = s->length; - /* Sanity check */ - if (slen == 0) { - dma_next = 0; - continue; - } - /* Allocate iommu entries for that segment */ - paddr = (unsigned long) SG_ENT_PHYS_ADDRESS(s); - npages = iommu_num_pages(paddr, slen); - entry = iommu_range_alloc(dev, iommu, npages, &handle); - - /* Handle failure */ - if (unlikely(entry == DMA_ERROR_CODE)) { - if (printk_ratelimit()) - printk(KERN_INFO "iommu_alloc failed, iommu %p paddr %lx" - " npages %lx\n", iommu, paddr, npages); - goto iommu_map_failed; - } - - iommu_batch_new_entry(entry); - - /* Convert entry to a dma_addr_t */ - dma_addr = iommu->page_table_map_base + - (entry << IO_PAGE_SHIFT); - dma_addr |= (s->offset & ~IO_PAGE_MASK); - - /* Insert into HW table */ - paddr &= IO_PAGE_MASK; - while (npages--) { - err = iommu_batch_add(paddr); - if (unlikely(err < 0L)) - goto iommu_map_failed; - paddr += IO_PAGE_SIZE; - } - - /* If we are in an open segment, try merging */ - if (segstart != s) { - /* We cannot merge if: - * - allocated dma_addr isn't contiguous to previous allocation - */ - if ((dma_addr != dma_next) || - (outs->dma_length + s->length > max_seg_size) || - (is_span_boundary(out_entry, base_shift, - seg_boundary_size, outs, s))) { - /* Can't merge: create a new segment */ - segstart = s; - outcount++; - outs = sg_next(outs); - } else { - outs->dma_length += s->length; - } - } - - if (segstart == s) { - /* This is a new segment, fill entries */ - outs->dma_address = dma_addr; - outs->dma_length = slen; - out_entry = entry; - } - - /* Calculate next page pointer for contiguous check */ - dma_next = dma_addr + slen; - } - - err = iommu_batch_end(); - - if (unlikely(err < 0L)) - goto iommu_map_failed; - - spin_unlock_irqrestore(&iommu->lock, flags); - - if (outcount < incount) { - outs = sg_next(outs); - outs->dma_address = DMA_ERROR_CODE; - outs->dma_length = 0; - } - - return outcount; - -iommu_map_failed: - for_each_sg(sglist, s, nelems, i) { - if (s->dma_length != 0) { - unsigned long vaddr, npages; - - vaddr = s->dma_address & IO_PAGE_MASK; - npages = iommu_num_pages(s->dma_address, s->dma_length); - iommu_range_free(iommu, vaddr, npages); - /* XXX demap? XXX */ - s->dma_address = DMA_ERROR_CODE; - s->dma_length = 0; - } - if (s == outs) - break; - } - spin_unlock_irqrestore(&iommu->lock, flags); - - return 0; -} - -static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, - int nelems, enum dma_data_direction direction) -{ - struct pci_pbm_info *pbm; - struct scatterlist *sg; - struct iommu *iommu; - unsigned long flags; - u32 devhandle; - - BUG_ON(direction == DMA_NONE); - - iommu = dev->archdata.iommu; - pbm = dev->archdata.host_controller; - devhandle = pbm->devhandle; - - spin_lock_irqsave(&iommu->lock, flags); - - sg = sglist; - while (nelems--) { - dma_addr_t dma_handle = sg->dma_address; - unsigned int len = sg->dma_length; - unsigned long npages, entry; - - if (!len) - break; - npages = iommu_num_pages(dma_handle, len); - iommu_range_free(iommu, dma_handle, npages); - - entry = ((dma_handle - iommu->page_table_map_base) >> IO_PAGE_SHIFT); - while (npages) { - unsigned long num; - - num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), - npages); - entry += num; - npages -= num; - } - - sg = sg_next(sg); - } - - spin_unlock_irqrestore(&iommu->lock, flags); -} - -static void dma_4v_sync_single_for_cpu(struct device *dev, - dma_addr_t bus_addr, size_t sz, - enum dma_data_direction direction) -{ - /* Nothing to do... */ -} - -static void dma_4v_sync_sg_for_cpu(struct device *dev, - struct scatterlist *sglist, int nelems, - enum dma_data_direction direction) -{ - /* Nothing to do... */ -} - -static const struct dma_ops sun4v_dma_ops = { - .alloc_coherent = dma_4v_alloc_coherent, - .free_coherent = dma_4v_free_coherent, - .map_single = dma_4v_map_single, - .unmap_single = dma_4v_unmap_single, - .map_sg = dma_4v_map_sg, - .unmap_sg = dma_4v_unmap_sg, - .sync_single_for_cpu = dma_4v_sync_single_for_cpu, - .sync_sg_for_cpu = dma_4v_sync_sg_for_cpu, -}; - -static void __init pci_sun4v_scan_bus(struct pci_pbm_info *pbm, - struct device *parent) -{ - struct property *prop; - struct device_node *dp; - - dp = pbm->op->node; - prop = of_find_property(dp, "66mhz-capable", NULL); - pbm->is_66mhz_capable = (prop != NULL); - pbm->pci_bus = pci_scan_one_pbm(pbm, parent); - - /* XXX register error interrupt handlers XXX */ -} - -static unsigned long __init probe_existing_entries(struct pci_pbm_info *pbm, - struct iommu *iommu) -{ - struct iommu_arena *arena = &iommu->arena; - unsigned long i, cnt = 0; - u32 devhandle; - - devhandle = pbm->devhandle; - for (i = 0; i < arena->limit; i++) { - unsigned long ret, io_attrs, ra; - - ret = pci_sun4v_iommu_getmap(devhandle, - HV_PCI_TSBID(0, i), - &io_attrs, &ra); - if (ret == HV_EOK) { - if (page_in_phys_avail(ra)) { - pci_sun4v_iommu_demap(devhandle, - HV_PCI_TSBID(0, i), 1); - } else { - cnt++; - __set_bit(i, arena->map); - } - } - } - - return cnt; -} - -static int __init pci_sun4v_iommu_init(struct pci_pbm_info *pbm) -{ - static const u32 vdma_default[] = { 0x80000000, 0x80000000 }; - struct iommu *iommu = pbm->iommu; - unsigned long num_tsb_entries, sz, tsbsize; - u32 dma_mask, dma_offset; - const u32 *vdma; - - vdma = of_get_property(pbm->op->node, "virtual-dma", NULL); - if (!vdma) - vdma = vdma_default; - - if ((vdma[0] | vdma[1]) & ~IO_PAGE_MASK) { - printk(KERN_ERR PFX "Strange virtual-dma[%08x:%08x].\n", - vdma[0], vdma[1]); - return -EINVAL; - }; - - dma_mask = (roundup_pow_of_two(vdma[1]) - 1UL); - num_tsb_entries = vdma[1] / IO_PAGE_SIZE; - tsbsize = num_tsb_entries * sizeof(iopte_t); - - dma_offset = vdma[0]; - - /* Setup initial software IOMMU state. */ - spin_lock_init(&iommu->lock); - iommu->ctx_lowest_free = 1; - iommu->page_table_map_base = dma_offset; - iommu->dma_addr_mask = dma_mask; - - /* Allocate and initialize the free area map. */ - sz = (num_tsb_entries + 7) / 8; - sz = (sz + 7UL) & ~7UL; - iommu->arena.map = kzalloc(sz, GFP_KERNEL); - if (!iommu->arena.map) { - printk(KERN_ERR PFX "Error, kmalloc(arena.map) failed.\n"); - return -ENOMEM; - } - iommu->arena.limit = num_tsb_entries; - - sz = probe_existing_entries(pbm, iommu); - if (sz) - printk("%s: Imported %lu TSB entries from OBP\n", - pbm->name, sz); - - return 0; -} - -#ifdef CONFIG_PCI_MSI -struct pci_sun4v_msiq_entry { - u64 version_type; -#define MSIQ_VERSION_MASK 0xffffffff00000000UL -#define MSIQ_VERSION_SHIFT 32 -#define MSIQ_TYPE_MASK 0x00000000000000ffUL -#define MSIQ_TYPE_SHIFT 0 -#define MSIQ_TYPE_NONE 0x00 -#define MSIQ_TYPE_MSG 0x01 -#define MSIQ_TYPE_MSI32 0x02 -#define MSIQ_TYPE_MSI64 0x03 -#define MSIQ_TYPE_INTX 0x08 -#define MSIQ_TYPE_NONE2 0xff - - u64 intx_sysino; - u64 reserved1; - u64 stick; - u64 req_id; /* bus/device/func */ -#define MSIQ_REQID_BUS_MASK 0xff00UL -#define MSIQ_REQID_BUS_SHIFT 8 -#define MSIQ_REQID_DEVICE_MASK 0x00f8UL -#define MSIQ_REQID_DEVICE_SHIFT 3 -#define MSIQ_REQID_FUNC_MASK 0x0007UL -#define MSIQ_REQID_FUNC_SHIFT 0 - - u64 msi_address; - - /* The format of this value is message type dependent. - * For MSI bits 15:0 are the data from the MSI packet. - * For MSI-X bits 31:0 are the data from the MSI packet. - * For MSG, the message code and message routing code where: - * bits 39:32 is the bus/device/fn of the msg target-id - * bits 18:16 is the message routing code - * bits 7:0 is the message code - * For INTx the low order 2-bits are: - * 00 - INTA - * 01 - INTB - * 10 - INTC - * 11 - INTD - */ - u64 msi_data; - - u64 reserved2; -}; - -static int pci_sun4v_get_head(struct pci_pbm_info *pbm, unsigned long msiqid, - unsigned long *head) -{ - unsigned long err, limit; - - err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, head); - if (unlikely(err)) - return -ENXIO; - - limit = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); - if (unlikely(*head >= limit)) - return -EFBIG; - - return 0; -} - -static int pci_sun4v_dequeue_msi(struct pci_pbm_info *pbm, - unsigned long msiqid, unsigned long *head, - unsigned long *msi) -{ - struct pci_sun4v_msiq_entry *ep; - unsigned long err, type; - - /* Note: void pointer arithmetic, 'head' is a byte offset */ - ep = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * - (pbm->msiq_ent_count * - sizeof(struct pci_sun4v_msiq_entry))) + - *head); - - if ((ep->version_type & MSIQ_TYPE_MASK) == 0) - return 0; - - type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; - if (unlikely(type != MSIQ_TYPE_MSI32 && - type != MSIQ_TYPE_MSI64)) - return -EINVAL; - - *msi = ep->msi_data; - - err = pci_sun4v_msi_setstate(pbm->devhandle, - ep->msi_data /* msi_num */, - HV_MSISTATE_IDLE); - if (unlikely(err)) - return -ENXIO; - - /* Clear the entry. */ - ep->version_type &= ~MSIQ_TYPE_MASK; - - (*head) += sizeof(struct pci_sun4v_msiq_entry); - if (*head >= - (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry))) - *head = 0; - - return 1; -} - -static int pci_sun4v_set_head(struct pci_pbm_info *pbm, unsigned long msiqid, - unsigned long head) -{ - unsigned long err; - - err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); - if (unlikely(err)) - return -EINVAL; - - return 0; -} - -static int pci_sun4v_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid, - unsigned long msi, int is_msi64) -{ - if (pci_sun4v_msi_setmsiq(pbm->devhandle, msi, msiqid, - (is_msi64 ? - HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) - return -ENXIO; - if (pci_sun4v_msi_setstate(pbm->devhandle, msi, HV_MSISTATE_IDLE)) - return -ENXIO; - if (pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_VALID)) - return -ENXIO; - return 0; -} - -static int pci_sun4v_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi) -{ - unsigned long err, msiqid; - - err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi, &msiqid); - if (err) - return -ENXIO; - - pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_INVALID); - - return 0; -} - -static int pci_sun4v_msiq_alloc(struct pci_pbm_info *pbm) -{ - unsigned long q_size, alloc_size, pages, order; - int i; - - q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); - alloc_size = (pbm->msiq_num * q_size); - order = get_order(alloc_size); - pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order); - if (pages == 0UL) { - printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n", - order); - return -ENOMEM; - } - memset((char *)pages, 0, PAGE_SIZE << order); - pbm->msi_queues = (void *) pages; - - for (i = 0; i < pbm->msiq_num; i++) { - unsigned long err, base = __pa(pages + (i * q_size)); - unsigned long ret1, ret2; - - err = pci_sun4v_msiq_conf(pbm->devhandle, - pbm->msiq_first + i, - base, pbm->msiq_ent_count); - if (err) { - printk(KERN_ERR "MSI: msiq register fails (err=%lu)\n", - err); - goto h_error; - } - - err = pci_sun4v_msiq_info(pbm->devhandle, - pbm->msiq_first + i, - &ret1, &ret2); - if (err) { - printk(KERN_ERR "MSI: Cannot read msiq (err=%lu)\n", - err); - goto h_error; - } - if (ret1 != base || ret2 != pbm->msiq_ent_count) { - printk(KERN_ERR "MSI: Bogus qconf " - "expected[%lx:%x] got[%lx:%lx]\n", - base, pbm->msiq_ent_count, - ret1, ret2); - goto h_error; - } - } - - return 0; - -h_error: - free_pages(pages, order); - return -EINVAL; -} - -static void pci_sun4v_msiq_free(struct pci_pbm_info *pbm) -{ - unsigned long q_size, alloc_size, pages, order; - int i; - - for (i = 0; i < pbm->msiq_num; i++) { - unsigned long msiqid = pbm->msiq_first + i; - - (void) pci_sun4v_msiq_conf(pbm->devhandle, msiqid, 0UL, 0); - } - - q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); - alloc_size = (pbm->msiq_num * q_size); - order = get_order(alloc_size); - - pages = (unsigned long) pbm->msi_queues; - - free_pages(pages, order); - - pbm->msi_queues = NULL; -} - -static int pci_sun4v_msiq_build_irq(struct pci_pbm_info *pbm, - unsigned long msiqid, - unsigned long devino) -{ - unsigned int virt_irq = sun4v_build_irq(pbm->devhandle, devino); - - if (!virt_irq) - return -ENOMEM; - - if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) - return -EINVAL; - if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) - return -EINVAL; - - return virt_irq; -} - -static const struct sparc64_msiq_ops pci_sun4v_msiq_ops = { - .get_head = pci_sun4v_get_head, - .dequeue_msi = pci_sun4v_dequeue_msi, - .set_head = pci_sun4v_set_head, - .msi_setup = pci_sun4v_msi_setup, - .msi_teardown = pci_sun4v_msi_teardown, - .msiq_alloc = pci_sun4v_msiq_alloc, - .msiq_free = pci_sun4v_msiq_free, - .msiq_build_irq = pci_sun4v_msiq_build_irq, -}; - -static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) -{ - sparc64_pbm_msi_init(pbm, &pci_sun4v_msiq_ops); -} -#else /* CONFIG_PCI_MSI */ -static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) -{ -} -#endif /* !(CONFIG_PCI_MSI) */ - -static int __init pci_sun4v_pbm_init(struct pci_pbm_info *pbm, - struct of_device *op, u32 devhandle) -{ - struct device_node *dp = op->node; - int err; - - pbm->numa_node = of_node_to_nid(dp); - - pbm->pci_ops = &sun4v_pci_ops; - pbm->config_space_reg_bits = 12; - - pbm->index = pci_num_pbms++; - - pbm->op = op; - - pbm->devhandle = devhandle; - - pbm->name = dp->full_name; - - printk("%s: SUN4V PCI Bus Module\n", pbm->name); - printk("%s: On NUMA node %d\n", pbm->name, pbm->numa_node); - - pci_determine_mem_io_space(pbm); - - pci_get_pbm_props(pbm); - - err = pci_sun4v_iommu_init(pbm); - if (err) - return err; - - pci_sun4v_msi_init(pbm); - - pci_sun4v_scan_bus(pbm, &op->dev); - - pbm->next = pci_pbm_root; - pci_pbm_root = pbm; - - return 0; -} - -static int __devinit pci_sun4v_probe(struct of_device *op, - const struct of_device_id *match) -{ - const struct linux_prom64_registers *regs; - static int hvapi_negotiated = 0; - struct pci_pbm_info *pbm; - struct device_node *dp; - struct iommu *iommu; - u32 devhandle; - int i, err; - - dp = op->node; - - if (!hvapi_negotiated++) { - err = sun4v_hvapi_register(HV_GRP_PCI, - vpci_major, - &vpci_minor); - - if (err) { - printk(KERN_ERR PFX "Could not register hvapi, " - "err=%d\n", err); - return err; - } - printk(KERN_INFO PFX "Registered hvapi major[%lu] minor[%lu]\n", - vpci_major, vpci_minor); - - dma_ops = &sun4v_dma_ops; - } - - regs = of_get_property(dp, "reg", NULL); - err = -ENODEV; - if (!regs) { - printk(KERN_ERR PFX "Could not find config registers\n"); - goto out_err; - } - devhandle = (regs->phys_addr >> 32UL) & 0x0fffffff; - - err = -ENOMEM; - if (!iommu_batch_initialized) { - for_each_possible_cpu(i) { - unsigned long page = get_zeroed_page(GFP_KERNEL); - - if (!page) - goto out_err; - - per_cpu(iommu_batch, i).pglist = (u64 *) page; - } - iommu_batch_initialized = 1; - } - - pbm = kzalloc(sizeof(*pbm), GFP_KERNEL); - if (!pbm) { - printk(KERN_ERR PFX "Could not allocate pci_pbm_info\n"); - goto out_err; - } - - iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL); - if (!iommu) { - printk(KERN_ERR PFX "Could not allocate pbm iommu\n"); - goto out_free_controller; - } - - pbm->iommu = iommu; - - err = pci_sun4v_pbm_init(pbm, op, devhandle); - if (err) - goto out_free_iommu; - - dev_set_drvdata(&op->dev, pbm); - - return 0; - -out_free_iommu: - kfree(pbm->iommu); - -out_free_controller: - kfree(pbm); - -out_err: - return err; -} - -static struct of_device_id __initdata pci_sun4v_match[] = { - { - .name = "pci", - .compatible = "SUNW,sun4v-pci", - }, - {}, -}; - -static struct of_platform_driver pci_sun4v_driver = { - .name = DRIVER_NAME, - .match_table = pci_sun4v_match, - .probe = pci_sun4v_probe, -}; - -static int __init pci_sun4v_init(void) -{ - return of_register_driver(&pci_sun4v_driver, &of_bus_type); -} - -subsys_initcall(pci_sun4v_init); |