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path: root/arch/sparc64/kernel/pci_sun4v.c
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Diffstat (limited to 'arch/sparc64/kernel/pci_sun4v.c')
-rw-r--r--arch/sparc64/kernel/pci_sun4v.c1033
1 files changed, 0 insertions, 1033 deletions
diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c
deleted file mode 100644
index 34a1fded394..00000000000
--- a/arch/sparc64/kernel/pci_sun4v.c
+++ /dev/null
@@ -1,1033 +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, IO_PAGE_SIZE);
- 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,
- IO_PAGE_SIZE);
- 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, IO_PAGE_SIZE);
- 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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 22:45:59 +0000