forked from Minki/linux
Merge branches 'core/iommu', 'x86/amd-iommu' and 'x86/iommu' into x86-v28-for-linus-phase3-B
Conflicts: arch/x86/kernel/pci-gart_64.c include/asm-x86/dma-mapping.h
This commit is contained in:
Ingo Molnar
commit
725c25819e
@ -284,6 +284,11 @@ and is between 256 and 4096 characters. It is defined in the file
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isolate - enable device isolation (each device, as far
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as possible, will get its own protection
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domain)
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fullflush - enable flushing of IO/TLB entries when
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they are unmapped. Otherwise they are
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flushed before they will be reused, which
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is a lot of faster
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amd_iommu_size= [HW,X86-64]
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Define the size of the aperture for the AMD IOMMU
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driver. Possible values are:
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@ -387,6 +387,7 @@ AMD IOMMU (AMD-VI)
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P: Joerg Roedel
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M: joerg.roedel@amd.com
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L: iommu@lists.linux-foundation.org
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T: git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu.git
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S: Supported
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AMS (Apple Motion Sensor) DRIVER
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@ -8,7 +8,9 @@
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#include <asm/machvec.h>
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#include <linux/scatterlist.h>
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#define dma_alloc_coherent platform_dma_alloc_coherent
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#define dma_alloc_coherent(dev, size, handle, gfp) \
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platform_dma_alloc_coherent(dev, size, handle, (gfp) | GFP_DMA)
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/* coherent mem. is cheap */
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static inline void *
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dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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@ -554,6 +554,7 @@ config CALGARY_IOMMU_ENABLED_BY_DEFAULT
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config AMD_IOMMU
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bool "AMD IOMMU support"
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select SWIOTLB
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select PCI_MSI
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depends on X86_64 && PCI && ACPI
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help
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With this option you can enable support for AMD IOMMU hardware in
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@ -33,6 +33,10 @@
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static DEFINE_RWLOCK(amd_iommu_devtable_lock);
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/* A list of preallocated protection domains */
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static LIST_HEAD(iommu_pd_list);
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static DEFINE_SPINLOCK(iommu_pd_list_lock);
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/*
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* general struct to manage commands send to an IOMMU
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*/
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@ -49,6 +53,102 @@ static int iommu_has_npcache(struct amd_iommu *iommu)
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return iommu->cap & IOMMU_CAP_NPCACHE;
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}
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/****************************************************************************
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*
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* Interrupt handling functions
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*
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****************************************************************************/
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static void iommu_print_event(void *__evt)
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{
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u32 *event = __evt;
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int type = (event[1] >> EVENT_TYPE_SHIFT) & EVENT_TYPE_MASK;
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int devid = (event[0] >> EVENT_DEVID_SHIFT) & EVENT_DEVID_MASK;
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int domid = (event[1] >> EVENT_DOMID_SHIFT) & EVENT_DOMID_MASK;
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int flags = (event[1] >> EVENT_FLAGS_SHIFT) & EVENT_FLAGS_MASK;
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u64 address = (u64)(((u64)event[3]) << 32) | event[2];
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printk(KERN_ERR "AMD IOMMU: Event logged [");
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switch (type) {
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case EVENT_TYPE_ILL_DEV:
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printk("ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x "
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"address=0x%016llx flags=0x%04x]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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address, flags);
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break;
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case EVENT_TYPE_IO_FAULT:
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printk("IO_PAGE_FAULT device=%02x:%02x.%x "
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"domain=0x%04x address=0x%016llx flags=0x%04x]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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domid, address, flags);
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break;
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case EVENT_TYPE_DEV_TAB_ERR:
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printk("DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
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"address=0x%016llx flags=0x%04x]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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address, flags);
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break;
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case EVENT_TYPE_PAGE_TAB_ERR:
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printk("PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
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"domain=0x%04x address=0x%016llx flags=0x%04x]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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domid, address, flags);
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break;
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case EVENT_TYPE_ILL_CMD:
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printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);
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break;
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case EVENT_TYPE_CMD_HARD_ERR:
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printk("COMMAND_HARDWARE_ERROR address=0x%016llx "
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"flags=0x%04x]\n", address, flags);
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break;
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case EVENT_TYPE_IOTLB_INV_TO:
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printk("IOTLB_INV_TIMEOUT device=%02x:%02x.%x "
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"address=0x%016llx]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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address);
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break;
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case EVENT_TYPE_INV_DEV_REQ:
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printk("INVALID_DEVICE_REQUEST device=%02x:%02x.%x "
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"address=0x%016llx flags=0x%04x]\n",
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PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid),
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address, flags);
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break;
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default:
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printk(KERN_ERR "UNKNOWN type=0x%02x]\n", type);
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}
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}
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static void iommu_poll_events(struct amd_iommu *iommu)
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{
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u32 head, tail;
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unsigned long flags;
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spin_lock_irqsave(&iommu->lock, flags);
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head = readl(iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
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tail = readl(iommu->mmio_base + MMIO_EVT_TAIL_OFFSET);
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while (head != tail) {
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iommu_print_event(iommu->evt_buf + head);
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head = (head + EVENT_ENTRY_SIZE) % iommu->evt_buf_size;
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}
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writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
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spin_unlock_irqrestore(&iommu->lock, flags);
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}
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irqreturn_t amd_iommu_int_handler(int irq, void *data)
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{
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struct amd_iommu *iommu;
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list_for_each_entry(iommu, &amd_iommu_list, list)
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iommu_poll_events(iommu);
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return IRQ_HANDLED;
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}
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/****************************************************************************
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*
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* IOMMU command queuing functions
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@ -213,6 +313,14 @@ static int iommu_flush_pages(struct amd_iommu *iommu, u16 domid,
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return 0;
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}
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/* Flush the whole IO/TLB for a given protection domain */
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static void iommu_flush_tlb(struct amd_iommu *iommu, u16 domid)
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{
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u64 address = CMD_INV_IOMMU_ALL_PAGES_ADDRESS;
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iommu_queue_inv_iommu_pages(iommu, address, domid, 0, 1);
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}
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/****************************************************************************
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*
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* The functions below are used the create the page table mappings for
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@ -372,11 +480,6 @@ static int init_unity_mappings_for_device(struct dma_ops_domain *dma_dom,
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* efficient allocator.
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*
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****************************************************************************/
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static unsigned long dma_mask_to_pages(unsigned long mask)
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{
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return (mask >> PAGE_SHIFT) +
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(PAGE_ALIGN(mask & ~PAGE_MASK) >> PAGE_SHIFT);
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}
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/*
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* The address allocator core function.
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@ -385,25 +488,31 @@ static unsigned long dma_mask_to_pages(unsigned long mask)
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*/
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static unsigned long dma_ops_alloc_addresses(struct device *dev,
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struct dma_ops_domain *dom,
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unsigned int pages)
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unsigned int pages,
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unsigned long align_mask,
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u64 dma_mask)
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{
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unsigned long limit = dma_mask_to_pages(*dev->dma_mask);
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unsigned long limit;
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unsigned long address;
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unsigned long size = dom->aperture_size >> PAGE_SHIFT;
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unsigned long boundary_size;
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boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
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PAGE_SIZE) >> PAGE_SHIFT;
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limit = limit < size ? limit : size;
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limit = iommu_device_max_index(dom->aperture_size >> PAGE_SHIFT, 0,
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dma_mask >> PAGE_SHIFT);
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if (dom->next_bit >= limit)
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if (dom->next_bit >= limit) {
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dom->next_bit = 0;
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dom->need_flush = true;
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}
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address = iommu_area_alloc(dom->bitmap, limit, dom->next_bit, pages,
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0 , boundary_size, 0);
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if (address == -1)
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0 , boundary_size, align_mask);
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if (address == -1) {
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address = iommu_area_alloc(dom->bitmap, limit, 0, pages,
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0, boundary_size, 0);
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0, boundary_size, align_mask);
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dom->need_flush = true;
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}
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if (likely(address != -1)) {
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dom->next_bit = address + pages;
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@ -469,7 +578,7 @@ static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
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if (start_page + pages > last_page)
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pages = last_page - start_page;
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set_bit_string(dom->bitmap, start_page, pages);
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iommu_area_reserve(dom->bitmap, start_page, pages);
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}
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static void dma_ops_free_pagetable(struct dma_ops_domain *dma_dom)
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@ -563,6 +672,9 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu,
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dma_dom->bitmap[0] = 1;
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dma_dom->next_bit = 0;
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dma_dom->need_flush = false;
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dma_dom->target_dev = 0xffff;
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/* Intialize the exclusion range if necessary */
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if (iommu->exclusion_start &&
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iommu->exclusion_start < dma_dom->aperture_size) {
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@ -633,12 +745,13 @@ static void set_device_domain(struct amd_iommu *iommu,
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u64 pte_root = virt_to_phys(domain->pt_root);
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pte_root |= (domain->mode & 0x07) << 9;
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pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | 2;
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pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
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<< DEV_ENTRY_MODE_SHIFT;
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pte_root |= IOMMU_PTE_IR | IOMMU_PTE_IW | IOMMU_PTE_P | IOMMU_PTE_TV;
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write_lock_irqsave(&amd_iommu_devtable_lock, flags);
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amd_iommu_dev_table[devid].data[0] = pte_root;
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amd_iommu_dev_table[devid].data[1] = pte_root >> 32;
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amd_iommu_dev_table[devid].data[0] = lower_32_bits(pte_root);
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amd_iommu_dev_table[devid].data[1] = upper_32_bits(pte_root);
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amd_iommu_dev_table[devid].data[2] = domain->id;
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amd_iommu_pd_table[devid] = domain;
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@ -655,6 +768,45 @@ static void set_device_domain(struct amd_iommu *iommu,
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*
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*****************************************************************************/
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/*
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* This function checks if the driver got a valid device from the caller to
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* avoid dereferencing invalid pointers.
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*/
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static bool check_device(struct device *dev)
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{
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if (!dev || !dev->dma_mask)
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return false;
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return true;
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}
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/*
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* In this function the list of preallocated protection domains is traversed to
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* find the domain for a specific device
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*/
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static struct dma_ops_domain *find_protection_domain(u16 devid)
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{
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struct dma_ops_domain *entry, *ret = NULL;
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unsigned long flags;
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if (list_empty(&iommu_pd_list))
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return NULL;
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spin_lock_irqsave(&iommu_pd_list_lock, flags);
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list_for_each_entry(entry, &iommu_pd_list, list) {
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if (entry->target_dev == devid) {
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ret = entry;
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list_del(&ret->list);
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break;
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}
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}
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spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
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return ret;
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}
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||||
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/*
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* In the dma_ops path we only have the struct device. This function
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||||
* finds the corresponding IOMMU, the protection domain and the
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@ -671,27 +823,30 @@ static int get_device_resources(struct device *dev,
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struct pci_dev *pcidev;
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u16 _bdf;
|
||||
|
||||
BUG_ON(!dev || dev->bus != &pci_bus_type || !dev->dma_mask);
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||||
*iommu = NULL;
|
||||
*domain = NULL;
|
||||
*bdf = 0xffff;
|
||||
|
||||
if (dev->bus != &pci_bus_type)
|
||||
return 0;
|
||||
|
||||
pcidev = to_pci_dev(dev);
|
||||
_bdf = calc_devid(pcidev->bus->number, pcidev->devfn);
|
||||
|
||||
/* device not translated by any IOMMU in the system? */
|
||||
if (_bdf > amd_iommu_last_bdf) {
|
||||
*iommu = NULL;
|
||||
*domain = NULL;
|
||||
*bdf = 0xffff;
|
||||
if (_bdf > amd_iommu_last_bdf)
|
||||
return 0;
|
||||
}
|
||||
|
||||
*bdf = amd_iommu_alias_table[_bdf];
|
||||
|
||||
*iommu = amd_iommu_rlookup_table[*bdf];
|
||||
if (*iommu == NULL)
|
||||
return 0;
|
||||
dma_dom = (*iommu)->default_dom;
|
||||
*domain = domain_for_device(*bdf);
|
||||
if (*domain == NULL) {
|
||||
dma_dom = find_protection_domain(*bdf);
|
||||
if (!dma_dom)
|
||||
dma_dom = (*iommu)->default_dom;
|
||||
*domain = &dma_dom->domain;
|
||||
set_device_domain(*iommu, *domain, *bdf);
|
||||
printk(KERN_INFO "AMD IOMMU: Using protection domain %d for "
|
||||
@ -770,17 +925,24 @@ static dma_addr_t __map_single(struct device *dev,
|
||||
struct dma_ops_domain *dma_dom,
|
||||
phys_addr_t paddr,
|
||||
size_t size,
|
||||
int dir)
|
||||
int dir,
|
||||
bool align,
|
||||
u64 dma_mask)
|
||||
{
|
||||
dma_addr_t offset = paddr & ~PAGE_MASK;
|
||||
dma_addr_t address, start;
|
||||
unsigned int pages;
|
||||
unsigned long align_mask = 0;
|
||||
int i;
|
||||
|
||||
pages = iommu_num_pages(paddr, size);
|
||||
paddr &= PAGE_MASK;
|
||||
|
||||
address = dma_ops_alloc_addresses(dev, dma_dom, pages);
|
||||
if (align)
|
||||
align_mask = (1UL << get_order(size)) - 1;
|
||||
|
||||
address = dma_ops_alloc_addresses(dev, dma_dom, pages, align_mask,
|
||||
dma_mask);
|
||||
if (unlikely(address == bad_dma_address))
|
||||
goto out;
|
||||
|
||||
@ -792,6 +954,12 @@ static dma_addr_t __map_single(struct device *dev,
|
||||
}
|
||||
address += offset;
|
||||
|
||||
if (unlikely(dma_dom->need_flush && !amd_iommu_unmap_flush)) {
|
||||
iommu_flush_tlb(iommu, dma_dom->domain.id);
|
||||
dma_dom->need_flush = false;
|
||||
} else if (unlikely(iommu_has_npcache(iommu)))
|
||||
iommu_flush_pages(iommu, dma_dom->domain.id, address, size);
|
||||
|
||||
out:
|
||||
return address;
|
||||
}
|
||||
@ -822,6 +990,9 @@ static void __unmap_single(struct amd_iommu *iommu,
|
||||
}
|
||||
|
||||
dma_ops_free_addresses(dma_dom, dma_addr, pages);
|
||||
|
||||
if (amd_iommu_unmap_flush)
|
||||
iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -835,6 +1006,12 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
|
||||
struct protection_domain *domain;
|
||||
u16 devid;
|
||||
dma_addr_t addr;
|
||||
u64 dma_mask;
|
||||
|
||||
if (!check_device(dev))
|
||||
return bad_dma_address;
|
||||
|
||||
dma_mask = *dev->dma_mask;
|
||||
|
||||
get_device_resources(dev, &iommu, &domain, &devid);
|
||||
|
||||
@ -843,14 +1020,12 @@ static dma_addr_t map_single(struct device *dev, phys_addr_t paddr,
|
||||
return (dma_addr_t)paddr;
|
||||
|
||||
spin_lock_irqsave(&domain->lock, flags);
|
||||
addr = __map_single(dev, iommu, domain->priv, paddr, size, dir);
|
||||
addr = __map_single(dev, iommu, domain->priv, paddr, size, dir, false,
|
||||
dma_mask);
|
||||
if (addr == bad_dma_address)
|
||||
goto out;
|
||||
|
||||
if (iommu_has_npcache(iommu))
|
||||
iommu_flush_pages(iommu, domain->id, addr, size);
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
out:
|
||||
@ -870,7 +1045,8 @@ static void unmap_single(struct device *dev, dma_addr_t dma_addr,
|
||||
struct protection_domain *domain;
|
||||
u16 devid;
|
||||
|
||||
if (!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
if (!check_device(dev) ||
|
||||
!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
/* device not handled by any AMD IOMMU */
|
||||
return;
|
||||
|
||||
@ -878,9 +1054,7 @@ static void unmap_single(struct device *dev, dma_addr_t dma_addr,
|
||||
|
||||
__unmap_single(iommu, domain->priv, dma_addr, size, dir);
|
||||
|
||||
iommu_flush_pages(iommu, domain->id, dma_addr, size);
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
spin_unlock_irqrestore(&domain->lock, flags);
|
||||
@ -919,6 +1093,12 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
|
||||
struct scatterlist *s;
|
||||
phys_addr_t paddr;
|
||||
int mapped_elems = 0;
|
||||
u64 dma_mask;
|
||||
|
||||
if (!check_device(dev))
|
||||
return 0;
|
||||
|
||||
dma_mask = *dev->dma_mask;
|
||||
|
||||
get_device_resources(dev, &iommu, &domain, &devid);
|
||||
|
||||
@ -931,19 +1111,17 @@ static int map_sg(struct device *dev, struct scatterlist *sglist,
|
||||
paddr = sg_phys(s);
|
||||
|
||||
s->dma_address = __map_single(dev, iommu, domain->priv,
|
||||
paddr, s->length, dir);
|
||||
paddr, s->length, dir, false,
|
||||
dma_mask);
|
||||
|
||||
if (s->dma_address) {
|
||||
s->dma_length = s->length;
|
||||
mapped_elems++;
|
||||
} else
|
||||
goto unmap;
|
||||
if (iommu_has_npcache(iommu))
|
||||
iommu_flush_pages(iommu, domain->id, s->dma_address,
|
||||
s->dma_length);
|
||||
}
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
out:
|
||||
@ -977,7 +1155,8 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
|
||||
u16 devid;
|
||||
int i;
|
||||
|
||||
if (!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
if (!check_device(dev) ||
|
||||
!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&domain->lock, flags);
|
||||
@ -985,12 +1164,10 @@ static void unmap_sg(struct device *dev, struct scatterlist *sglist,
|
||||
for_each_sg(sglist, s, nelems, i) {
|
||||
__unmap_single(iommu, domain->priv, s->dma_address,
|
||||
s->dma_length, dir);
|
||||
iommu_flush_pages(iommu, domain->id, s->dma_address,
|
||||
s->dma_length);
|
||||
s->dma_address = s->dma_length = 0;
|
||||
}
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
spin_unlock_irqrestore(&domain->lock, flags);
|
||||
@ -1008,25 +1185,33 @@ static void *alloc_coherent(struct device *dev, size_t size,
|
||||
struct protection_domain *domain;
|
||||
u16 devid;
|
||||
phys_addr_t paddr;
|
||||
u64 dma_mask = dev->coherent_dma_mask;
|
||||
|
||||
if (!check_device(dev))
|
||||
return NULL;
|
||||
|
||||
if (!get_device_resources(dev, &iommu, &domain, &devid))
|
||||
flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
flag |= __GFP_ZERO;
|
||||
virt_addr = (void *)__get_free_pages(flag, get_order(size));
|
||||
if (!virt_addr)
|
||||
return 0;
|
||||
|
||||
memset(virt_addr, 0, size);
|
||||
paddr = virt_to_phys(virt_addr);
|
||||
|
||||
get_device_resources(dev, &iommu, &domain, &devid);
|
||||
|
||||
if (!iommu || !domain) {
|
||||
*dma_addr = (dma_addr_t)paddr;
|
||||
return virt_addr;
|
||||
}
|
||||
|
||||
if (!dma_mask)
|
||||
dma_mask = *dev->dma_mask;
|
||||
|
||||
spin_lock_irqsave(&domain->lock, flags);
|
||||
|
||||
*dma_addr = __map_single(dev, iommu, domain->priv, paddr,
|
||||
size, DMA_BIDIRECTIONAL);
|
||||
size, DMA_BIDIRECTIONAL, true, dma_mask);
|
||||
|
||||
if (*dma_addr == bad_dma_address) {
|
||||
free_pages((unsigned long)virt_addr, get_order(size));
|
||||
@ -1034,10 +1219,7 @@ static void *alloc_coherent(struct device *dev, size_t size,
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (iommu_has_npcache(iommu))
|
||||
iommu_flush_pages(iommu, domain->id, *dma_addr, size);
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
out:
|
||||
@ -1048,8 +1230,6 @@ out:
|
||||
|
||||
/*
|
||||
* The exported free_coherent function for dma_ops.
|
||||
* FIXME: fix the generic x86 DMA layer so that it actually calls that
|
||||
* function.
|
||||
*/
|
||||
static void free_coherent(struct device *dev, size_t size,
|
||||
void *virt_addr, dma_addr_t dma_addr)
|
||||
@ -1059,6 +1239,9 @@ static void free_coherent(struct device *dev, size_t size,
|
||||
struct protection_domain *domain;
|
||||
u16 devid;
|
||||
|
||||
if (!check_device(dev))
|
||||
return;
|
||||
|
||||
get_device_resources(dev, &iommu, &domain, &devid);
|
||||
|
||||
if (!iommu || !domain)
|
||||
@ -1067,9 +1250,8 @@ static void free_coherent(struct device *dev, size_t size,
|
||||
spin_lock_irqsave(&domain->lock, flags);
|
||||
|
||||
__unmap_single(iommu, domain->priv, dma_addr, size, DMA_BIDIRECTIONAL);
|
||||
iommu_flush_pages(iommu, domain->id, dma_addr, size);
|
||||
|
||||
if (iommu->need_sync)
|
||||
if (unlikely(iommu->need_sync))
|
||||
iommu_completion_wait(iommu);
|
||||
|
||||
spin_unlock_irqrestore(&domain->lock, flags);
|
||||
@ -1078,6 +1260,30 @@ free_mem:
|
||||
free_pages((unsigned long)virt_addr, get_order(size));
|
||||
}
|
||||
|
||||
/*
|
||||
* This function is called by the DMA layer to find out if we can handle a
|
||||
* particular device. It is part of the dma_ops.
|
||||
*/
|
||||
static int amd_iommu_dma_supported(struct device *dev, u64 mask)
|
||||
{
|
||||
u16 bdf;
|
||||
struct pci_dev *pcidev;
|
||||
|
||||
/* No device or no PCI device */
|
||||
if (!dev || dev->bus != &pci_bus_type)
|
||||
return 0;
|
||||
|
||||
pcidev = to_pci_dev(dev);
|
||||
|
||||
bdf = calc_devid(pcidev->bus->number, pcidev->devfn);
|
||||
|
||||
/* Out of our scope? */
|
||||
if (bdf > amd_iommu_last_bdf)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* The function for pre-allocating protection domains.
|
||||
*
|
||||
@ -1107,10 +1313,9 @@ void prealloc_protection_domains(void)
|
||||
if (!dma_dom)
|
||||
continue;
|
||||
init_unity_mappings_for_device(dma_dom, devid);
|
||||
set_device_domain(iommu, &dma_dom->domain, devid);
|
||||
printk(KERN_INFO "AMD IOMMU: Allocated domain %d for device ",
|
||||
dma_dom->domain.id);
|
||||
print_devid(devid, 1);
|
||||
dma_dom->target_dev = devid;
|
||||
|
||||
list_add_tail(&dma_dom->list, &iommu_pd_list);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1121,6 +1326,7 @@ static struct dma_mapping_ops amd_iommu_dma_ops = {
|
||||
.unmap_single = unmap_single,
|
||||
.map_sg = map_sg,
|
||||
.unmap_sg = unmap_sg,
|
||||
.dma_supported = amd_iommu_dma_supported,
|
||||
};
|
||||
|
||||
/*
|
||||
|
||||
@ -22,6 +22,8 @@
|
||||
#include <linux/gfp.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/sysdev.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/msi.h>
|
||||
#include <asm/pci-direct.h>
|
||||
#include <asm/amd_iommu_types.h>
|
||||
#include <asm/amd_iommu.h>
|
||||
@ -30,7 +32,6 @@
|
||||
/*
|
||||
* definitions for the ACPI scanning code
|
||||
*/
|
||||
#define PCI_BUS(x) (((x) >> 8) & 0xff)
|
||||
#define IVRS_HEADER_LENGTH 48
|
||||
|
||||
#define ACPI_IVHD_TYPE 0x10
|
||||
@ -121,6 +122,7 @@ LIST_HEAD(amd_iommu_unity_map); /* a list of required unity mappings
|
||||
we find in ACPI */
|
||||
unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
|
||||
int amd_iommu_isolate; /* if 1, device isolation is enabled */
|
||||
bool amd_iommu_unmap_flush; /* if true, flush on every unmap */
|
||||
|
||||
LIST_HEAD(amd_iommu_list); /* list of all AMD IOMMUs in the
|
||||
system */
|
||||
@ -234,7 +236,7 @@ static void __init iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
|
||||
{
|
||||
u32 ctrl;
|
||||
|
||||
ctrl = (u64)readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
|
||||
ctrl = readl(iommu->mmio_base + MMIO_CONTROL_OFFSET);
|
||||
ctrl &= ~(1 << bit);
|
||||
writel(ctrl, iommu->mmio_base + MMIO_CONTROL_OFFSET);
|
||||
}
|
||||
@ -242,13 +244,23 @@ static void __init iommu_feature_disable(struct amd_iommu *iommu, u8 bit)
|
||||
/* Function to enable the hardware */
|
||||
void __init iommu_enable(struct amd_iommu *iommu)
|
||||
{
|
||||
printk(KERN_INFO "AMD IOMMU: Enabling IOMMU at ");
|
||||
print_devid(iommu->devid, 0);
|
||||
printk(" cap 0x%hx\n", iommu->cap_ptr);
|
||||
printk(KERN_INFO "AMD IOMMU: Enabling IOMMU "
|
||||
"at %02x:%02x.%x cap 0x%hx\n",
|
||||
iommu->dev->bus->number,
|
||||
PCI_SLOT(iommu->dev->devfn),
|
||||
PCI_FUNC(iommu->dev->devfn),
|
||||
iommu->cap_ptr);
|
||||
|
||||
iommu_feature_enable(iommu, CONTROL_IOMMU_EN);
|
||||
}
|
||||
|
||||
/* Function to enable IOMMU event logging and event interrupts */
|
||||
void __init iommu_enable_event_logging(struct amd_iommu *iommu)
|
||||
{
|
||||
iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
|
||||
iommu_feature_enable(iommu, CONTROL_EVT_INT_EN);
|
||||
}
|
||||
|
||||
/*
|
||||
* mapping and unmapping functions for the IOMMU MMIO space. Each AMD IOMMU in
|
||||
* the system has one.
|
||||
@ -285,6 +297,14 @@ static void __init iommu_unmap_mmio_space(struct amd_iommu *iommu)
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/*
|
||||
* This function calculates the length of a given IVHD entry
|
||||
*/
|
||||
static inline int ivhd_entry_length(u8 *ivhd)
|
||||
{
|
||||
return 0x04 << (*ivhd >> 6);
|
||||
}
|
||||
|
||||
/*
|
||||
* This function reads the last device id the IOMMU has to handle from the PCI
|
||||
* capability header for this IOMMU
|
||||
@ -329,7 +349,7 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
|
||||
default:
|
||||
break;
|
||||
}
|
||||
p += 0x04 << (*p >> 6);
|
||||
p += ivhd_entry_length(p);
|
||||
}
|
||||
|
||||
WARN_ON(p != end);
|
||||
@ -414,7 +434,32 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
|
||||
|
||||
static void __init free_command_buffer(struct amd_iommu *iommu)
|
||||
{
|
||||
free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
|
||||
free_pages((unsigned long)iommu->cmd_buf,
|
||||
get_order(iommu->cmd_buf_size));
|
||||
}
|
||||
|
||||
/* allocates the memory where the IOMMU will log its events to */
|
||||
static u8 * __init alloc_event_buffer(struct amd_iommu *iommu)
|
||||
{
|
||||
u64 entry;
|
||||
iommu->evt_buf = (u8 *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
||||
get_order(EVT_BUFFER_SIZE));
|
||||
|
||||
if (iommu->evt_buf == NULL)
|
||||
return NULL;
|
||||
|
||||
entry = (u64)virt_to_phys(iommu->evt_buf) | EVT_LEN_MASK;
|
||||
memcpy_toio(iommu->mmio_base + MMIO_EVT_BUF_OFFSET,
|
||||
&entry, sizeof(entry));
|
||||
|
||||
iommu->evt_buf_size = EVT_BUFFER_SIZE;
|
||||
|
||||
return iommu->evt_buf;
|
||||
}
|
||||
|
||||
static void __init free_event_buffer(struct amd_iommu *iommu)
|
||||
{
|
||||
free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
|
||||
}
|
||||
|
||||
/* sets a specific bit in the device table entry. */
|
||||
@ -487,19 +532,21 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
|
||||
*/
|
||||
static void __init init_iommu_from_pci(struct amd_iommu *iommu)
|
||||
{
|
||||
int bus = PCI_BUS(iommu->devid);
|
||||
int dev = PCI_SLOT(iommu->devid);
|
||||
int fn = PCI_FUNC(iommu->devid);
|
||||
int cap_ptr = iommu->cap_ptr;
|
||||
u32 range;
|
||||
u32 range, misc;
|
||||
|
||||
iommu->cap = read_pci_config(bus, dev, fn, cap_ptr+MMIO_CAP_HDR_OFFSET);
|
||||
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
|
||||
&iommu->cap);
|
||||
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
|
||||
&range);
|
||||
pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
|
||||
&misc);
|
||||
|
||||
range = read_pci_config(bus, dev, fn, cap_ptr+MMIO_RANGE_OFFSET);
|
||||
iommu->first_device = calc_devid(MMIO_GET_BUS(range),
|
||||
MMIO_GET_FD(range));
|
||||
iommu->last_device = calc_devid(MMIO_GET_BUS(range),
|
||||
MMIO_GET_LD(range));
|
||||
iommu->evt_msi_num = MMIO_MSI_NUM(misc);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -604,7 +651,7 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
|
||||
break;
|
||||
}
|
||||
|
||||
p += 0x04 << (e->type >> 6);
|
||||
p += ivhd_entry_length(p);
|
||||
}
|
||||
}
|
||||
|
||||
@ -622,6 +669,7 @@ static int __init init_iommu_devices(struct amd_iommu *iommu)
|
||||
static void __init free_iommu_one(struct amd_iommu *iommu)
|
||||
{
|
||||
free_command_buffer(iommu);
|
||||
free_event_buffer(iommu);
|
||||
iommu_unmap_mmio_space(iommu);
|
||||
}
|
||||
|
||||
@ -649,8 +697,12 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
|
||||
/*
|
||||
* Copy data from ACPI table entry to the iommu struct
|
||||
*/
|
||||
iommu->devid = h->devid;
|
||||
iommu->dev = pci_get_bus_and_slot(PCI_BUS(h->devid), h->devid & 0xff);
|
||||
if (!iommu->dev)
|
||||
return 1;
|
||||
|
||||
iommu->cap_ptr = h->cap_ptr;
|
||||
iommu->pci_seg = h->pci_seg;
|
||||
iommu->mmio_phys = h->mmio_phys;
|
||||
iommu->mmio_base = iommu_map_mmio_space(h->mmio_phys);
|
||||
if (!iommu->mmio_base)
|
||||
@ -661,10 +713,18 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
|
||||
if (!iommu->cmd_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
iommu->evt_buf = alloc_event_buffer(iommu);
|
||||
if (!iommu->evt_buf)
|
||||
return -ENOMEM;
|
||||
|
||||
iommu->int_enabled = false;
|
||||
|
||||
init_iommu_from_pci(iommu);
|
||||
init_iommu_from_acpi(iommu, h);
|
||||
init_iommu_devices(iommu);
|
||||
|
||||
pci_enable_device(iommu->dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -704,6 +764,95 @@ static int __init init_iommu_all(struct acpi_table_header *table)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
*
|
||||
* The following functions initialize the MSI interrupts for all IOMMUs
|
||||
* in the system. Its a bit challenging because there could be multiple
|
||||
* IOMMUs per PCI BDF but we can call pci_enable_msi(x) only once per
|
||||
* pci_dev.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
static int __init iommu_setup_msix(struct amd_iommu *iommu)
|
||||
{
|
||||
struct amd_iommu *curr;
|
||||
struct msix_entry entries[32]; /* only 32 supported by AMD IOMMU */
|
||||
int nvec = 0, i;
|
||||
|
||||
list_for_each_entry(curr, &amd_iommu_list, list) {
|
||||
if (curr->dev == iommu->dev) {
|
||||
entries[nvec].entry = curr->evt_msi_num;
|
||||
entries[nvec].vector = 0;
|
||||
curr->int_enabled = true;
|
||||
nvec++;
|
||||
}
|
||||
}
|
||||
|
||||
if (pci_enable_msix(iommu->dev, entries, nvec)) {
|
||||
pci_disable_msix(iommu->dev);
|
||||
return 1;
|
||||
}
|
||||
|
||||
for (i = 0; i < nvec; ++i) {
|
||||
int r = request_irq(entries->vector, amd_iommu_int_handler,
|
||||
IRQF_SAMPLE_RANDOM,
|
||||
"AMD IOMMU",
|
||||
NULL);
|
||||
if (r)
|
||||
goto out_free;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
out_free:
|
||||
for (i -= 1; i >= 0; --i)
|
||||
free_irq(entries->vector, NULL);
|
||||
|
||||
pci_disable_msix(iommu->dev);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int __init iommu_setup_msi(struct amd_iommu *iommu)
|
||||
{
|
||||
int r;
|
||||
struct amd_iommu *curr;
|
||||
|
||||
list_for_each_entry(curr, &amd_iommu_list, list) {
|
||||
if (curr->dev == iommu->dev)
|
||||
curr->int_enabled = true;
|
||||
}
|
||||
|
||||
|
||||
if (pci_enable_msi(iommu->dev))
|
||||
return 1;
|
||||
|
||||
r = request_irq(iommu->dev->irq, amd_iommu_int_handler,
|
||||
IRQF_SAMPLE_RANDOM,
|
||||
"AMD IOMMU",
|
||||
NULL);
|
||||
|
||||
if (r) {
|
||||
pci_disable_msi(iommu->dev);
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init iommu_init_msi(struct amd_iommu *iommu)
|
||||
{
|
||||
if (iommu->int_enabled)
|
||||
return 0;
|
||||
|
||||
if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSIX))
|
||||
return iommu_setup_msix(iommu);
|
||||
else if (pci_find_capability(iommu->dev, PCI_CAP_ID_MSI))
|
||||
return iommu_setup_msi(iommu);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
*
|
||||
* The next functions belong to the third pass of parsing the ACPI
|
||||
@ -811,7 +960,6 @@ static void init_device_table(void)
|
||||
for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
|
||||
set_dev_entry_bit(devid, DEV_ENTRY_VALID);
|
||||
set_dev_entry_bit(devid, DEV_ENTRY_TRANSLATION);
|
||||
set_dev_entry_bit(devid, DEV_ENTRY_NO_PAGE_FAULT);
|
||||
}
|
||||
}
|
||||
|
||||
@ -825,6 +973,8 @@ static void __init enable_iommus(void)
|
||||
|
||||
list_for_each_entry(iommu, &amd_iommu_list, list) {
|
||||
iommu_set_exclusion_range(iommu);
|
||||
iommu_init_msi(iommu);
|
||||
iommu_enable_event_logging(iommu);
|
||||
iommu_enable(iommu);
|
||||
}
|
||||
}
|
||||
@ -995,11 +1145,17 @@ int __init amd_iommu_init(void)
|
||||
else
|
||||
printk("disabled\n");
|
||||
|
||||
if (amd_iommu_unmap_flush)
|
||||
printk(KERN_INFO "AMD IOMMU: IO/TLB flush on unmap enabled\n");
|
||||
else
|
||||
printk(KERN_INFO "AMD IOMMU: Lazy IO/TLB flushing enabled\n");
|
||||
|
||||
out:
|
||||
return ret;
|
||||
|
||||
free:
|
||||
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap, 1);
|
||||
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
|
||||
get_order(MAX_DOMAIN_ID/8));
|
||||
|
||||
free_pages((unsigned long)amd_iommu_pd_table,
|
||||
get_order(rlookup_table_size));
|
||||
@ -1057,8 +1213,10 @@ void __init amd_iommu_detect(void)
|
||||
static int __init parse_amd_iommu_options(char *str)
|
||||
{
|
||||
for (; *str; ++str) {
|
||||
if (strcmp(str, "isolate") == 0)
|
||||
if (strncmp(str, "isolate", 7) == 0)
|
||||
amd_iommu_isolate = 1;
|
||||
if (strncmp(str, "fullflush", 11) == 0)
|
||||
amd_iommu_unmap_flush = true;
|
||||
}
|
||||
|
||||
return 1;
|
||||
|
||||
@ -95,6 +95,20 @@ static void __init nvidia_bugs(int num, int slot, int func)
|
||||
|
||||
}
|
||||
|
||||
#ifdef CONFIG_DMAR
|
||||
static void __init intel_g33_dmar(int num, int slot, int func)
|
||||
{
|
||||
struct acpi_table_header *dmar_tbl;
|
||||
acpi_status status;
|
||||
|
||||
status = acpi_get_table(ACPI_SIG_DMAR, 0, &dmar_tbl);
|
||||
if (ACPI_SUCCESS(status)) {
|
||||
printk(KERN_INFO "BIOS BUG: DMAR advertised on Intel G31/G33 chipset -- ignoring\n");
|
||||
dmar_disabled = 1;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#define QFLAG_APPLY_ONCE 0x1
|
||||
#define QFLAG_APPLIED 0x2
|
||||
#define QFLAG_DONE (QFLAG_APPLY_ONCE|QFLAG_APPLIED)
|
||||
@ -114,6 +128,10 @@ static struct chipset early_qrk[] __initdata = {
|
||||
PCI_CLASS_BRIDGE_PCI, PCI_ANY_ID, QFLAG_APPLY_ONCE, via_bugs },
|
||||
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,
|
||||
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config },
|
||||
#ifdef CONFIG_DMAR
|
||||
{ PCI_VENDOR_ID_INTEL, 0x29c0,
|
||||
PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar },
|
||||
#endif
|
||||
{}
|
||||
};
|
||||
|
||||
|
||||
@ -16,8 +16,9 @@ EXPORT_SYMBOL(num_k8_northbridges);
|
||||
static u32 *flush_words;
|
||||
|
||||
struct pci_device_id k8_nb_ids[] = {
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1103) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x1203) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB_MISC) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_10H_NB_MISC) },
|
||||
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_11H_NB_MISC) },
|
||||
{}
|
||||
};
|
||||
EXPORT_SYMBOL(k8_nb_ids);
|
||||
|
||||
@ -261,7 +261,7 @@ static void iommu_range_reserve(struct iommu_table *tbl,
|
||||
badbit, tbl, start_addr, npages);
|
||||
}
|
||||
|
||||
set_bit_string(tbl->it_map, index, npages);
|
||||
iommu_area_reserve(tbl->it_map, index, npages);
|
||||
|
||||
spin_unlock_irqrestore(&tbl->it_lock, flags);
|
||||
}
|
||||
@ -491,6 +491,8 @@ static void* calgary_alloc_coherent(struct device *dev, size_t size,
|
||||
npages = size >> PAGE_SHIFT;
|
||||
order = get_order(size);
|
||||
|
||||
flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
/* alloc enough pages (and possibly more) */
|
||||
ret = (void *)__get_free_pages(flag, order);
|
||||
if (!ret)
|
||||
@ -510,8 +512,22 @@ error:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void calgary_free_coherent(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t dma_handle)
|
||||
{
|
||||
unsigned int npages;
|
||||
struct iommu_table *tbl = find_iommu_table(dev);
|
||||
|
||||
size = PAGE_ALIGN(size);
|
||||
npages = size >> PAGE_SHIFT;
|
||||
|
||||
iommu_free(tbl, dma_handle, npages);
|
||||
free_pages((unsigned long)vaddr, get_order(size));
|
||||
}
|
||||
|
||||
static struct dma_mapping_ops calgary_dma_ops = {
|
||||
.alloc_coherent = calgary_alloc_coherent,
|
||||
.free_coherent = calgary_free_coherent,
|
||||
.map_single = calgary_map_single,
|
||||
.unmap_single = calgary_unmap_single,
|
||||
.map_sg = calgary_map_sg,
|
||||
|
||||
@ -41,11 +41,12 @@ EXPORT_SYMBOL(bad_dma_address);
|
||||
/* Dummy device used for NULL arguments (normally ISA). Better would
|
||||
be probably a smaller DMA mask, but this is bug-to-bug compatible
|
||||
to older i386. */
|
||||
struct device fallback_dev = {
|
||||
struct device x86_dma_fallback_dev = {
|
||||
.bus_id = "fallback device",
|
||||
.coherent_dma_mask = DMA_32BIT_MASK,
|
||||
.dma_mask = &fallback_dev.coherent_dma_mask,
|
||||
.dma_mask = &x86_dma_fallback_dev.coherent_dma_mask,
|
||||
};
|
||||
EXPORT_SYMBOL(x86_dma_fallback_dev);
|
||||
|
||||
int dma_set_mask(struct device *dev, u64 mask)
|
||||
{
|
||||
@ -133,6 +134,37 @@ unsigned long iommu_num_pages(unsigned long addr, unsigned long len)
|
||||
EXPORT_SYMBOL(iommu_num_pages);
|
||||
#endif
|
||||
|
||||
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_addr, gfp_t flag)
|
||||
{
|
||||
unsigned long dma_mask;
|
||||
struct page *page;
|
||||
dma_addr_t addr;
|
||||
|
||||
dma_mask = dma_alloc_coherent_mask(dev, flag);
|
||||
|
||||
flag |= __GFP_ZERO;
|
||||
again:
|
||||
page = alloc_pages_node(dev_to_node(dev), flag, get_order(size));
|
||||
if (!page)
|
||||
return NULL;
|
||||
|
||||
addr = page_to_phys(page);
|
||||
if (!is_buffer_dma_capable(dma_mask, addr, size)) {
|
||||
__free_pages(page, get_order(size));
|
||||
|
||||
if (dma_mask < DMA_32BIT_MASK && !(flag & GFP_DMA)) {
|
||||
flag = (flag & ~GFP_DMA32) | GFP_DMA;
|
||||
goto again;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
*dma_addr = addr;
|
||||
return page_address(page);
|
||||
}
|
||||
|
||||
/*
|
||||
* See <Documentation/x86_64/boot-options.txt> for the iommu kernel parameter
|
||||
* documentation.
|
||||
@ -241,147 +273,6 @@ int dma_supported(struct device *dev, u64 mask)
|
||||
}
|
||||
EXPORT_SYMBOL(dma_supported);
|
||||
|
||||
/* Allocate DMA memory on node near device */
|
||||
static noinline struct page *
|
||||
dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order)
|
||||
{
|
||||
int node;
|
||||
|
||||
node = dev_to_node(dev);
|
||||
|
||||
return alloc_pages_node(node, gfp, order);
|
||||
}
|
||||
|
||||
/*
|
||||
* Allocate memory for a coherent mapping.
|
||||
*/
|
||||
void *
|
||||
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
||||
gfp_t gfp)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
void *memory = NULL;
|
||||
struct page *page;
|
||||
unsigned long dma_mask = 0;
|
||||
dma_addr_t bus;
|
||||
int noretry = 0;
|
||||
|
||||
/* ignore region specifiers */
|
||||
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
|
||||
return memory;
|
||||
|
||||
if (!dev) {
|
||||
dev = &fallback_dev;
|
||||
gfp |= GFP_DMA;
|
||||
}
|
||||
dma_mask = dev->coherent_dma_mask;
|
||||
if (dma_mask == 0)
|
||||
dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
|
||||
|
||||
/* Device not DMA able */
|
||||
if (dev->dma_mask == NULL)
|
||||
return NULL;
|
||||
|
||||
/* Don't invoke OOM killer or retry in lower 16MB DMA zone */
|
||||
if (gfp & __GFP_DMA)
|
||||
noretry = 1;
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
/* Why <=? Even when the mask is smaller than 4GB it is often
|
||||
larger than 16MB and in this case we have a chance of
|
||||
finding fitting memory in the next higher zone first. If
|
||||
not retry with true GFP_DMA. -AK */
|
||||
if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
|
||||
gfp |= GFP_DMA32;
|
||||
if (dma_mask < DMA_32BIT_MASK)
|
||||
noretry = 1;
|
||||
}
|
||||
#endif
|
||||
|
||||
again:
|
||||
page = dma_alloc_pages(dev,
|
||||
noretry ? gfp | __GFP_NORETRY : gfp, get_order(size));
|
||||
if (page == NULL)
|
||||
return NULL;
|
||||
|
||||
{
|
||||
int high, mmu;
|
||||
bus = page_to_phys(page);
|
||||
memory = page_address(page);
|
||||
high = (bus + size) >= dma_mask;
|
||||
mmu = high;
|
||||
if (force_iommu && !(gfp & GFP_DMA))
|
||||
mmu = 1;
|
||||
else if (high) {
|
||||
free_pages((unsigned long)memory,
|
||||
get_order(size));
|
||||
|
||||
/* Don't use the 16MB ZONE_DMA unless absolutely
|
||||
needed. It's better to use remapping first. */
|
||||
if (dma_mask < DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
|
||||
gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
|
||||
goto again;
|
||||
}
|
||||
|
||||
/* Let low level make its own zone decisions */
|
||||
gfp &= ~(GFP_DMA32|GFP_DMA);
|
||||
|
||||
if (ops->alloc_coherent)
|
||||
return ops->alloc_coherent(dev, size,
|
||||
dma_handle, gfp);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
memset(memory, 0, size);
|
||||
if (!mmu) {
|
||||
*dma_handle = bus;
|
||||
return memory;
|
||||
}
|
||||
}
|
||||
|
||||
if (ops->alloc_coherent) {
|
||||
free_pages((unsigned long)memory, get_order(size));
|
||||
gfp &= ~(GFP_DMA|GFP_DMA32);
|
||||
return ops->alloc_coherent(dev, size, dma_handle, gfp);
|
||||
}
|
||||
|
||||
if (ops->map_simple) {
|
||||
*dma_handle = ops->map_simple(dev, virt_to_phys(memory),
|
||||
size,
|
||||
PCI_DMA_BIDIRECTIONAL);
|
||||
if (*dma_handle != bad_dma_address)
|
||||
return memory;
|
||||
}
|
||||
|
||||
if (panic_on_overflow)
|
||||
panic("dma_alloc_coherent: IOMMU overflow by %lu bytes\n",
|
||||
(unsigned long)size);
|
||||
free_pages((unsigned long)memory, get_order(size));
|
||||
return NULL;
|
||||
}
|
||||
EXPORT_SYMBOL(dma_alloc_coherent);
|
||||
|
||||
/*
|
||||
* Unmap coherent memory.
|
||||
* The caller must ensure that the device has finished accessing the mapping.
|
||||
*/
|
||||
void dma_free_coherent(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t bus)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
|
||||
int order = get_order(size);
|
||||
WARN_ON(irqs_disabled()); /* for portability */
|
||||
if (dma_release_from_coherent(dev, order, vaddr))
|
||||
return;
|
||||
if (ops->unmap_single)
|
||||
ops->unmap_single(dev, bus, size, 0);
|
||||
free_pages((unsigned long)vaddr, order);
|
||||
}
|
||||
EXPORT_SYMBOL(dma_free_coherent);
|
||||
|
||||
static int __init pci_iommu_init(void)
|
||||
{
|
||||
calgary_iommu_init();
|
||||
|
||||
@ -27,8 +27,8 @@
|
||||
#include <linux/scatterlist.h>
|
||||
#include <linux/iommu-helper.h>
|
||||
#include <linux/sysdev.h>
|
||||
#include <linux/io.h>
|
||||
#include <asm/atomic.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/mtrr.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/proto.h>
|
||||
@ -80,7 +80,7 @@ AGPEXTERN int agp_memory_reserved;
|
||||
AGPEXTERN __u32 *agp_gatt_table;
|
||||
|
||||
static unsigned long next_bit; /* protected by iommu_bitmap_lock */
|
||||
static int need_flush; /* global flush state. set for each gart wrap */
|
||||
static bool need_flush; /* global flush state. set for each gart wrap */
|
||||
|
||||
static unsigned long alloc_iommu(struct device *dev, int size,
|
||||
unsigned long align_mask)
|
||||
@ -98,7 +98,7 @@ static unsigned long alloc_iommu(struct device *dev, int size,
|
||||
offset = iommu_area_alloc(iommu_gart_bitmap, iommu_pages, next_bit,
|
||||
size, base_index, boundary_size, align_mask);
|
||||
if (offset == -1) {
|
||||
need_flush = 1;
|
||||
need_flush = true;
|
||||
offset = iommu_area_alloc(iommu_gart_bitmap, iommu_pages, 0,
|
||||
size, base_index, boundary_size,
|
||||
align_mask);
|
||||
@ -107,11 +107,11 @@ static unsigned long alloc_iommu(struct device *dev, int size,
|
||||
next_bit = offset+size;
|
||||
if (next_bit >= iommu_pages) {
|
||||
next_bit = 0;
|
||||
need_flush = 1;
|
||||
need_flush = true;
|
||||
}
|
||||
}
|
||||
if (iommu_fullflush)
|
||||
need_flush = 1;
|
||||
need_flush = true;
|
||||
spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
|
||||
|
||||
return offset;
|
||||
@ -136,7 +136,7 @@ static void flush_gart(void)
|
||||
spin_lock_irqsave(&iommu_bitmap_lock, flags);
|
||||
if (need_flush) {
|
||||
k8_flush_garts();
|
||||
need_flush = 0;
|
||||
need_flush = false;
|
||||
}
|
||||
spin_unlock_irqrestore(&iommu_bitmap_lock, flags);
|
||||
}
|
||||
@ -175,7 +175,8 @@ static void dump_leak(void)
|
||||
iommu_leak_pages);
|
||||
for (i = 0; i < iommu_leak_pages; i += 2) {
|
||||
printk(KERN_DEBUG "%lu: ", iommu_pages-i);
|
||||
printk_address((unsigned long) iommu_leak_tab[iommu_pages-i], 0);
|
||||
printk_address((unsigned long) iommu_leak_tab[iommu_pages-i],
|
||||
0);
|
||||
printk(KERN_CONT "%c", (i+1)%2 == 0 ? '\n' : ' ');
|
||||
}
|
||||
printk(KERN_DEBUG "\n");
|
||||
@ -214,24 +215,14 @@ static void iommu_full(struct device *dev, size_t size, int dir)
|
||||
static inline int
|
||||
need_iommu(struct device *dev, unsigned long addr, size_t size)
|
||||
{
|
||||
u64 mask = *dev->dma_mask;
|
||||
int high = addr + size > mask;
|
||||
int mmu = high;
|
||||
|
||||
if (force_iommu)
|
||||
mmu = 1;
|
||||
|
||||
return mmu;
|
||||
return force_iommu ||
|
||||
!is_buffer_dma_capable(*dev->dma_mask, addr, size);
|
||||
}
|
||||
|
||||
static inline int
|
||||
nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
|
||||
{
|
||||
u64 mask = *dev->dma_mask;
|
||||
int high = addr + size > mask;
|
||||
int mmu = high;
|
||||
|
||||
return mmu;
|
||||
return !is_buffer_dma_capable(*dev->dma_mask, addr, size);
|
||||
}
|
||||
|
||||
/* Map a single continuous physical area into the IOMMU.
|
||||
@ -261,20 +252,6 @@ static dma_addr_t dma_map_area(struct device *dev, dma_addr_t phys_mem,
|
||||
return iommu_bus_base + iommu_page*PAGE_SIZE + (phys_mem & ~PAGE_MASK);
|
||||
}
|
||||
|
||||
static dma_addr_t
|
||||
gart_map_simple(struct device *dev, phys_addr_t paddr, size_t size, int dir)
|
||||
{
|
||||
dma_addr_t map;
|
||||
unsigned long align_mask;
|
||||
|
||||
align_mask = (1UL << get_order(size)) - 1;
|
||||
map = dma_map_area(dev, paddr, size, dir, align_mask);
|
||||
|
||||
flush_gart();
|
||||
|
||||
return map;
|
||||
}
|
||||
|
||||
/* Map a single area into the IOMMU */
|
||||
static dma_addr_t
|
||||
gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
|
||||
@ -282,7 +259,7 @@ gart_map_single(struct device *dev, phys_addr_t paddr, size_t size, int dir)
|
||||
unsigned long bus;
|
||||
|
||||
if (!dev)
|
||||
dev = &fallback_dev;
|
||||
dev = &x86_dma_fallback_dev;
|
||||
|
||||
if (!need_iommu(dev, paddr, size))
|
||||
return paddr;
|
||||
@ -434,7 +411,7 @@ gart_map_sg(struct device *dev, struct scatterlist *sg, int nents, int dir)
|
||||
return 0;
|
||||
|
||||
if (!dev)
|
||||
dev = &fallback_dev;
|
||||
dev = &x86_dma_fallback_dev;
|
||||
|
||||
out = 0;
|
||||
start = 0;
|
||||
@ -506,6 +483,46 @@ error:
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* allocate and map a coherent mapping */
|
||||
static void *
|
||||
gart_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_addr,
|
||||
gfp_t flag)
|
||||
{
|
||||
dma_addr_t paddr;
|
||||
unsigned long align_mask;
|
||||
struct page *page;
|
||||
|
||||
if (force_iommu && !(flag & GFP_DMA)) {
|
||||
flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
page = alloc_pages(flag | __GFP_ZERO, get_order(size));
|
||||
if (!page)
|
||||
return NULL;
|
||||
|
||||
align_mask = (1UL << get_order(size)) - 1;
|
||||
paddr = dma_map_area(dev, page_to_phys(page), size,
|
||||
DMA_BIDIRECTIONAL, align_mask);
|
||||
|
||||
flush_gart();
|
||||
if (paddr != bad_dma_address) {
|
||||
*dma_addr = paddr;
|
||||
return page_address(page);
|
||||
}
|
||||
__free_pages(page, get_order(size));
|
||||
} else
|
||||
return dma_generic_alloc_coherent(dev, size, dma_addr, flag);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* free a coherent mapping */
|
||||
static void
|
||||
gart_free_coherent(struct device *dev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_addr)
|
||||
{
|
||||
gart_unmap_single(dev, dma_addr, size, DMA_BIDIRECTIONAL);
|
||||
free_pages((unsigned long)vaddr, get_order(size));
|
||||
}
|
||||
|
||||
static int no_agp;
|
||||
|
||||
static __init unsigned long check_iommu_size(unsigned long aper, u64 aper_size)
|
||||
@ -656,13 +673,13 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
|
||||
info->aper_size = aper_size >> 20;
|
||||
|
||||
gatt_size = (aper_size >> PAGE_SHIFT) * sizeof(u32);
|
||||
gatt = (void *)__get_free_pages(GFP_KERNEL, get_order(gatt_size));
|
||||
gatt = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
||||
get_order(gatt_size));
|
||||
if (!gatt)
|
||||
panic("Cannot allocate GATT table");
|
||||
if (set_memory_uc((unsigned long)gatt, gatt_size >> PAGE_SHIFT))
|
||||
panic("Could not set GART PTEs to uncacheable pages");
|
||||
|
||||
memset(gatt, 0, gatt_size);
|
||||
agp_gatt_table = gatt;
|
||||
|
||||
enable_gart_translations();
|
||||
@ -671,7 +688,8 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
|
||||
if (!error)
|
||||
error = sysdev_register(&device_gart);
|
||||
if (error)
|
||||
panic("Could not register gart_sysdev -- would corrupt data on next suspend");
|
||||
panic("Could not register gart_sysdev -- "
|
||||
"would corrupt data on next suspend");
|
||||
|
||||
flush_gart();
|
||||
|
||||
@ -687,20 +705,13 @@ static __init int init_k8_gatt(struct agp_kern_info *info)
|
||||
return -1;
|
||||
}
|
||||
|
||||
extern int agp_amd64_init(void);
|
||||
|
||||
static struct dma_mapping_ops gart_dma_ops = {
|
||||
.map_single = gart_map_single,
|
||||
.map_simple = gart_map_simple,
|
||||
.unmap_single = gart_unmap_single,
|
||||
.sync_single_for_cpu = NULL,
|
||||
.sync_single_for_device = NULL,
|
||||
.sync_single_range_for_cpu = NULL,
|
||||
.sync_single_range_for_device = NULL,
|
||||
.sync_sg_for_cpu = NULL,
|
||||
.sync_sg_for_device = NULL,
|
||||
.map_sg = gart_map_sg,
|
||||
.unmap_sg = gart_unmap_sg,
|
||||
.alloc_coherent = gart_alloc_coherent,
|
||||
.free_coherent = gart_free_coherent,
|
||||
};
|
||||
|
||||
void gart_iommu_shutdown(void)
|
||||
@ -760,8 +771,8 @@ void __init gart_iommu_init(void)
|
||||
(no_agp && init_k8_gatt(&info) < 0)) {
|
||||
if (max_pfn > MAX_DMA32_PFN) {
|
||||
printk(KERN_WARNING "More than 4GB of memory "
|
||||
"but GART IOMMU not available.\n"
|
||||
KERN_WARNING "falling back to iommu=soft.\n");
|
||||
"but GART IOMMU not available.\n");
|
||||
printk(KERN_WARNING "falling back to iommu=soft.\n");
|
||||
}
|
||||
return;
|
||||
}
|
||||
@ -779,19 +790,16 @@ void __init gart_iommu_init(void)
|
||||
iommu_size = check_iommu_size(info.aper_base, aper_size);
|
||||
iommu_pages = iommu_size >> PAGE_SHIFT;
|
||||
|
||||
iommu_gart_bitmap = (void *) __get_free_pages(GFP_KERNEL,
|
||||
iommu_gart_bitmap = (void *) __get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
||||
get_order(iommu_pages/8));
|
||||
if (!iommu_gart_bitmap)
|
||||
panic("Cannot allocate iommu bitmap\n");
|
||||
memset(iommu_gart_bitmap, 0, iommu_pages/8);
|
||||
|
||||
#ifdef CONFIG_IOMMU_LEAK
|
||||
if (leak_trace) {
|
||||
iommu_leak_tab = (void *)__get_free_pages(GFP_KERNEL,
|
||||
iommu_leak_tab = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
|
||||
get_order(iommu_pages*sizeof(void *)));
|
||||
if (iommu_leak_tab)
|
||||
memset(iommu_leak_tab, 0, iommu_pages * 8);
|
||||
else
|
||||
if (!iommu_leak_tab)
|
||||
printk(KERN_DEBUG
|
||||
"PCI-DMA: Cannot allocate leak trace area\n");
|
||||
}
|
||||
@ -801,7 +809,7 @@ void __init gart_iommu_init(void)
|
||||
* Out of IOMMU space handling.
|
||||
* Reserve some invalid pages at the beginning of the GART.
|
||||
*/
|
||||
set_bit_string(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
|
||||
iommu_area_reserve(iommu_gart_bitmap, 0, EMERGENCY_PAGES);
|
||||
|
||||
agp_memory_reserved = iommu_size;
|
||||
printk(KERN_INFO
|
||||
@ -859,7 +867,8 @@ void __init gart_parse_options(char *p)
|
||||
if (!strncmp(p, "leak", 4)) {
|
||||
leak_trace = 1;
|
||||
p += 4;
|
||||
if (*p == '=') ++p;
|
||||
if (*p == '=')
|
||||
++p;
|
||||
if (isdigit(*p) && get_option(&p, &arg))
|
||||
iommu_leak_pages = arg;
|
||||
}
|
||||
|
||||
@ -14,7 +14,7 @@
|
||||
static int
|
||||
check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
|
||||
{
|
||||
if (hwdev && bus + size > *hwdev->dma_mask) {
|
||||
if (hwdev && !is_buffer_dma_capable(*hwdev->dma_mask, bus, size)) {
|
||||
if (*hwdev->dma_mask >= DMA_32BIT_MASK)
|
||||
printk(KERN_ERR
|
||||
"nommu_%s: overflow %Lx+%zu of device mask %Lx\n",
|
||||
@ -72,7 +72,15 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
|
||||
return nents;
|
||||
}
|
||||
|
||||
static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_addr)
|
||||
{
|
||||
free_pages((unsigned long)vaddr, get_order(size));
|
||||
}
|
||||
|
||||
struct dma_mapping_ops nommu_dma_ops = {
|
||||
.alloc_coherent = dma_generic_alloc_coherent,
|
||||
.free_coherent = nommu_free_coherent,
|
||||
.map_single = nommu_map_single,
|
||||
.map_sg = nommu_map_sg,
|
||||
.is_phys = 1,
|
||||
|
||||
@ -80,7 +80,7 @@ static long list_size;
|
||||
|
||||
static void domain_remove_dev_info(struct dmar_domain *domain);
|
||||
|
||||
static int dmar_disabled;
|
||||
int dmar_disabled;
|
||||
static int __initdata dmar_map_gfx = 1;
|
||||
static int dmar_forcedac;
|
||||
static int intel_iommu_strict;
|
||||
|
||||
@ -20,10 +20,13 @@
|
||||
#ifndef ASM_X86__AMD_IOMMU_H
|
||||
#define ASM_X86__AMD_IOMMU_H
|
||||
|
||||
#include <linux/irqreturn.h>
|
||||
|
||||
#ifdef CONFIG_AMD_IOMMU
|
||||
extern int amd_iommu_init(void);
|
||||
extern int amd_iommu_init_dma_ops(void);
|
||||
extern void amd_iommu_detect(void);
|
||||
extern irqreturn_t amd_iommu_int_handler(int irq, void *data);
|
||||
#else
|
||||
static inline int amd_iommu_init(void) { return -ENODEV; }
|
||||
static inline void amd_iommu_detect(void) { }
|
||||
|
||||
@ -37,6 +37,7 @@
|
||||
/* Capability offsets used by the driver */
|
||||
#define MMIO_CAP_HDR_OFFSET 0x00
|
||||
#define MMIO_RANGE_OFFSET 0x0c
|
||||
#define MMIO_MISC_OFFSET 0x10
|
||||
|
||||
/* Masks, shifts and macros to parse the device range capability */
|
||||
#define MMIO_RANGE_LD_MASK 0xff000000
|
||||
@ -48,6 +49,7 @@
|
||||
#define MMIO_GET_LD(x) (((x) & MMIO_RANGE_LD_MASK) >> MMIO_RANGE_LD_SHIFT)
|
||||
#define MMIO_GET_FD(x) (((x) & MMIO_RANGE_FD_MASK) >> MMIO_RANGE_FD_SHIFT)
|
||||
#define MMIO_GET_BUS(x) (((x) & MMIO_RANGE_BUS_MASK) >> MMIO_RANGE_BUS_SHIFT)
|
||||
#define MMIO_MSI_NUM(x) ((x) & 0x1f)
|
||||
|
||||
/* Flag masks for the AMD IOMMU exclusion range */
|
||||
#define MMIO_EXCL_ENABLE_MASK 0x01ULL
|
||||
@ -69,6 +71,25 @@
|
||||
/* MMIO status bits */
|
||||
#define MMIO_STATUS_COM_WAIT_INT_MASK 0x04
|
||||
|
||||
/* event logging constants */
|
||||
#define EVENT_ENTRY_SIZE 0x10
|
||||
#define EVENT_TYPE_SHIFT 28
|
||||
#define EVENT_TYPE_MASK 0xf
|
||||
#define EVENT_TYPE_ILL_DEV 0x1
|
||||
#define EVENT_TYPE_IO_FAULT 0x2
|
||||
#define EVENT_TYPE_DEV_TAB_ERR 0x3
|
||||
#define EVENT_TYPE_PAGE_TAB_ERR 0x4
|
||||
#define EVENT_TYPE_ILL_CMD 0x5
|
||||
#define EVENT_TYPE_CMD_HARD_ERR 0x6
|
||||
#define EVENT_TYPE_IOTLB_INV_TO 0x7
|
||||
#define EVENT_TYPE_INV_DEV_REQ 0x8
|
||||
#define EVENT_DEVID_MASK 0xffff
|
||||
#define EVENT_DEVID_SHIFT 0
|
||||
#define EVENT_DOMID_MASK 0xffff
|
||||
#define EVENT_DOMID_SHIFT 0
|
||||
#define EVENT_FLAGS_MASK 0xfff
|
||||
#define EVENT_FLAGS_SHIFT 0x10
|
||||
|
||||
/* feature control bits */
|
||||
#define CONTROL_IOMMU_EN 0x00ULL
|
||||
#define CONTROL_HT_TUN_EN 0x01ULL
|
||||
@ -109,6 +130,8 @@
|
||||
#define DEV_ENTRY_NMI_PASS 0xba
|
||||
#define DEV_ENTRY_LINT0_PASS 0xbe
|
||||
#define DEV_ENTRY_LINT1_PASS 0xbf
|
||||
#define DEV_ENTRY_MODE_MASK 0x07
|
||||
#define DEV_ENTRY_MODE_SHIFT 0x09
|
||||
|
||||
/* constants to configure the command buffer */
|
||||
#define CMD_BUFFER_SIZE 8192
|
||||
@ -116,6 +139,10 @@
|
||||
#define MMIO_CMD_SIZE_SHIFT 56
|
||||
#define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT)
|
||||
|
||||
/* constants for event buffer handling */
|
||||
#define EVT_BUFFER_SIZE 8192 /* 512 entries */
|
||||
#define EVT_LEN_MASK (0x9ULL << 56)
|
||||
|
||||
#define PAGE_MODE_1_LEVEL 0x01
|
||||
#define PAGE_MODE_2_LEVEL 0x02
|
||||
#define PAGE_MODE_3_LEVEL 0x03
|
||||
@ -134,6 +161,7 @@
|
||||
#define IOMMU_MAP_SIZE_L3 (1ULL << 39)
|
||||
|
||||
#define IOMMU_PTE_P (1ULL << 0)
|
||||
#define IOMMU_PTE_TV (1ULL << 1)
|
||||
#define IOMMU_PTE_U (1ULL << 59)
|
||||
#define IOMMU_PTE_FC (1ULL << 60)
|
||||
#define IOMMU_PTE_IR (1ULL << 61)
|
||||
@ -159,6 +187,9 @@
|
||||
|
||||
#define MAX_DOMAIN_ID 65536
|
||||
|
||||
/* FIXME: move this macro to <linux/pci.h> */
|
||||
#define PCI_BUS(x) (((x) >> 8) & 0xff)
|
||||
|
||||
/*
|
||||
* This structure contains generic data for IOMMU protection domains
|
||||
* independent of their use.
|
||||
@ -196,6 +227,15 @@ struct dma_ops_domain {
|
||||
* just calculate its address in constant time.
|
||||
*/
|
||||
u64 **pte_pages;
|
||||
|
||||
/* This will be set to true when TLB needs to be flushed */
|
||||
bool need_flush;
|
||||
|
||||
/*
|
||||
* if this is a preallocated domain, keep the device for which it was
|
||||
* preallocated in this variable
|
||||
*/
|
||||
u16 target_dev;
|
||||
};
|
||||
|
||||
/*
|
||||
@ -208,8 +248,9 @@ struct amd_iommu {
|
||||
/* locks the accesses to the hardware */
|
||||
spinlock_t lock;
|
||||
|
||||
/* device id of this IOMMU */
|
||||
u16 devid;
|
||||
/* Pointer to PCI device of this IOMMU */
|
||||
struct pci_dev *dev;
|
||||
|
||||
/*
|
||||
* Capability pointer. There could be more than one IOMMU per PCI
|
||||
* device function if there are more than one AMD IOMMU capability
|
||||
@ -225,6 +266,9 @@ struct amd_iommu {
|
||||
/* capabilities of that IOMMU read from ACPI */
|
||||
u32 cap;
|
||||
|
||||
/* pci domain of this IOMMU */
|
||||
u16 pci_seg;
|
||||
|
||||
/* first device this IOMMU handles. read from PCI */
|
||||
u16 first_device;
|
||||
/* last device this IOMMU handles. read from PCI */
|
||||
@ -240,9 +284,19 @@ struct amd_iommu {
|
||||
/* size of command buffer */
|
||||
u32 cmd_buf_size;
|
||||
|
||||
/* event buffer virtual address */
|
||||
u8 *evt_buf;
|
||||
/* size of event buffer */
|
||||
u32 evt_buf_size;
|
||||
/* MSI number for event interrupt */
|
||||
u16 evt_msi_num;
|
||||
|
||||
/* if one, we need to send a completion wait command */
|
||||
int need_sync;
|
||||
|
||||
/* true if interrupts for this IOMMU are already enabled */
|
||||
bool int_enabled;
|
||||
|
||||
/* default dma_ops domain for that IOMMU */
|
||||
struct dma_ops_domain *default_dom;
|
||||
};
|
||||
@ -322,6 +376,12 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap;
|
||||
/* will be 1 if device isolation is enabled */
|
||||
extern int amd_iommu_isolate;
|
||||
|
||||
/*
|
||||
* If true, the addresses will be flushed on unmap time, not when
|
||||
* they are reused
|
||||
*/
|
||||
extern bool amd_iommu_unmap_flush;
|
||||
|
||||
/* takes a PCI device id and prints it out in a readable form */
|
||||
static inline void print_devid(u16 devid, int nl)
|
||||
{
|
||||
|
||||
@ -424,16 +424,6 @@ static inline int fls(int x)
|
||||
|
||||
#undef ADDR
|
||||
|
||||
static inline void set_bit_string(unsigned long *bitmap,
|
||||
unsigned long i, int len)
|
||||
{
|
||||
unsigned long end = i + len;
|
||||
while (i < end) {
|
||||
__set_bit(i, bitmap);
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <asm-generic/bitops/sched.h>
|
||||
|
||||
@ -9,12 +9,12 @@
|
||||
#include <linux/scatterlist.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/swiotlb.h>
|
||||
#include <asm-generic/dma-coherent.h>
|
||||
|
||||
extern dma_addr_t bad_dma_address;
|
||||
extern int iommu_merge;
|
||||
extern struct device fallback_dev;
|
||||
extern struct device x86_dma_fallback_dev;
|
||||
extern int panic_on_overflow;
|
||||
extern int force_iommu;
|
||||
|
||||
struct dma_mapping_ops {
|
||||
int (*mapping_error)(struct device *dev,
|
||||
@ -25,9 +25,6 @@ struct dma_mapping_ops {
|
||||
void *vaddr, dma_addr_t dma_handle);
|
||||
dma_addr_t (*map_single)(struct device *hwdev, phys_addr_t ptr,
|
||||
size_t size, int direction);
|
||||
/* like map_single, but doesn't check the device mask */
|
||||
dma_addr_t (*map_simple)(struct device *hwdev, phys_addr_t ptr,
|
||||
size_t size, int direction);
|
||||
void (*unmap_single)(struct device *dev, dma_addr_t addr,
|
||||
size_t size, int direction);
|
||||
void (*sync_single_for_cpu)(struct device *hwdev,
|
||||
@ -68,7 +65,7 @@ static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
|
||||
return dma_ops;
|
||||
else
|
||||
return dev->archdata.dma_ops;
|
||||
#endif
|
||||
#endif /* ASM_X86__DMA_MAPPING_H */
|
||||
}
|
||||
|
||||
/* Make sure we keep the same behaviour */
|
||||
@ -87,17 +84,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
||||
|
||||
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
|
||||
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
|
||||
|
||||
void *dma_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t flag);
|
||||
|
||||
void dma_free_coherent(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t dma_handle);
|
||||
|
||||
#define dma_is_consistent(d, h) (1)
|
||||
|
||||
extern int dma_supported(struct device *hwdev, u64 mask);
|
||||
extern int dma_set_mask(struct device *dev, u64 mask);
|
||||
|
||||
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_addr, gfp_t flag);
|
||||
|
||||
static inline dma_addr_t
|
||||
dma_map_single(struct device *hwdev, void *ptr, size_t size,
|
||||
int direction)
|
||||
@ -247,7 +241,68 @@ static inline int dma_get_cache_alignment(void)
|
||||
return boot_cpu_data.x86_clflush_size;
|
||||
}
|
||||
|
||||
#define dma_is_consistent(d, h) (1)
|
||||
static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
|
||||
gfp_t gfp)
|
||||
{
|
||||
unsigned long dma_mask = 0;
|
||||
|
||||
#include <asm-generic/dma-coherent.h>
|
||||
#endif /* ASM_X86__DMA_MAPPING_H */
|
||||
dma_mask = dev->coherent_dma_mask;
|
||||
if (!dma_mask)
|
||||
dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
|
||||
|
||||
return dma_mask;
|
||||
}
|
||||
|
||||
static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
|
||||
{
|
||||
#ifdef CONFIG_X86_64
|
||||
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
|
||||
|
||||
if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
|
||||
gfp |= GFP_DMA32;
|
||||
#endif
|
||||
return gfp;
|
||||
}
|
||||
|
||||
static inline void *
|
||||
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
||||
gfp_t gfp)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
void *memory;
|
||||
|
||||
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
|
||||
|
||||
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
|
||||
return memory;
|
||||
|
||||
if (!dev) {
|
||||
dev = &x86_dma_fallback_dev;
|
||||
gfp |= GFP_DMA;
|
||||
}
|
||||
|
||||
if (!is_device_dma_capable(dev))
|
||||
return NULL;
|
||||
|
||||
if (!ops->alloc_coherent)
|
||||
return NULL;
|
||||
|
||||
return ops->alloc_coherent(dev, size, dma_handle,
|
||||
dma_alloc_coherent_gfp_flags(dev, gfp));
|
||||
}
|
||||
|
||||
static inline void dma_free_coherent(struct device *dev, size_t size,
|
||||
void *vaddr, dma_addr_t bus)
|
||||
{
|
||||
struct dma_mapping_ops *ops = get_dma_ops(dev);
|
||||
|
||||
WARN_ON(irqs_disabled()); /* for portability */
|
||||
|
||||
if (dma_release_from_coherent(dev, get_order(size), vaddr))
|
||||
return;
|
||||
|
||||
if (ops->free_coherent)
|
||||
ops->free_coherent(dev, size, vaddr, bus);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
@ -29,6 +29,8 @@ extern int fix_aperture;
|
||||
#define AMD64_GARTCACHECTL 0x9c
|
||||
#define AMD64_GARTEN (1<<0)
|
||||
|
||||
extern int agp_amd64_init(void);
|
||||
|
||||
static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
|
||||
{
|
||||
u32 tmp, ctl;
|
||||
|
||||
@ -6,6 +6,7 @@ extern void no_iommu_init(void);
|
||||
extern struct dma_mapping_ops nommu_dma_ops;
|
||||
extern int force_iommu, no_iommu;
|
||||
extern int iommu_detected;
|
||||
extern int dmar_disabled;
|
||||
|
||||
extern unsigned long iommu_num_pages(unsigned long addr, unsigned long len);
|
||||
|
||||
|
||||
@ -48,6 +48,11 @@ static inline int is_device_dma_capable(struct device *dev)
|
||||
return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
|
||||
}
|
||||
|
||||
static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
|
||||
{
|
||||
return addr + size <= mask;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HAS_DMA
|
||||
#include <asm/dma-mapping.h>
|
||||
#else
|
||||
@ -58,6 +63,13 @@ static inline int is_device_dma_capable(struct device *dev)
|
||||
#define dma_sync_single dma_sync_single_for_cpu
|
||||
#define dma_sync_sg dma_sync_sg_for_cpu
|
||||
|
||||
static inline u64 dma_get_mask(struct device *dev)
|
||||
{
|
||||
if (dev && dev->dma_mask && *dev->dma_mask)
|
||||
return *dev->dma_mask;
|
||||
return DMA_32BIT_MASK;
|
||||
}
|
||||
|
||||
extern u64 dma_get_required_mask(struct device *dev);
|
||||
|
||||
static inline unsigned int dma_get_max_seg_size(struct device *dev)
|
||||
|
||||
@ -1,6 +1,20 @@
|
||||
#ifndef _LINUX_IOMMU_HELPER_H
|
||||
#define _LINUX_IOMMU_HELPER_H
|
||||
|
||||
static inline unsigned long iommu_device_max_index(unsigned long size,
|
||||
unsigned long offset,
|
||||
u64 dma_mask)
|
||||
{
|
||||
if (size + offset > dma_mask)
|
||||
return dma_mask - offset + 1;
|
||||
else
|
||||
return size;
|
||||
}
|
||||
|
||||
extern int iommu_is_span_boundary(unsigned int index, unsigned int nr,
|
||||
unsigned long shift,
|
||||
unsigned long boundary_size);
|
||||
extern void iommu_area_reserve(unsigned long *map, unsigned long i, int len);
|
||||
extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
|
||||
unsigned long start, unsigned int nr,
|
||||
unsigned long shift,
|
||||
@ -8,3 +22,5 @@ extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size,
|
||||
unsigned long align_mask);
|
||||
extern void iommu_area_free(unsigned long *map, unsigned long start,
|
||||
unsigned int nr);
|
||||
|
||||
#endif
|
||||
|
||||
@ -497,6 +497,16 @@
|
||||
#define PCI_DEVICE_ID_AMD_K8_NB_ADDRMAP 0x1101
|
||||
#define PCI_DEVICE_ID_AMD_K8_NB_MEMCTL 0x1102
|
||||
#define PCI_DEVICE_ID_AMD_K8_NB_MISC 0x1103
|
||||
#define PCI_DEVICE_ID_AMD_10H_NB_HT 0x1200
|
||||
#define PCI_DEVICE_ID_AMD_10H_NB_MAP 0x1201
|
||||
#define PCI_DEVICE_ID_AMD_10H_NB_DRAM 0x1202
|
||||
#define PCI_DEVICE_ID_AMD_10H_NB_MISC 0x1203
|
||||
#define PCI_DEVICE_ID_AMD_10H_NB_LINK 0x1204
|
||||
#define PCI_DEVICE_ID_AMD_11H_NB_HT 0x1300
|
||||
#define PCI_DEVICE_ID_AMD_11H_NB_MAP 0x1301
|
||||
#define PCI_DEVICE_ID_AMD_11H_NB_DRAM 0x1302
|
||||
#define PCI_DEVICE_ID_AMD_11H_NB_MISC 0x1303
|
||||
#define PCI_DEVICE_ID_AMD_11H_NB_LINK 0x1304
|
||||
#define PCI_DEVICE_ID_AMD_LANCE 0x2000
|
||||
#define PCI_DEVICE_ID_AMD_LANCE_HOME 0x2001
|
||||
#define PCI_DEVICE_ID_AMD_SCSI 0x2020
|
||||
|
||||
@ -124,6 +124,7 @@ int dma_alloc_from_coherent(struct device *dev, ssize_t size,
|
||||
}
|
||||
return (mem != NULL);
|
||||
}
|
||||
EXPORT_SYMBOL(dma_alloc_from_coherent);
|
||||
|
||||
/**
|
||||
* dma_release_from_coherent() - try to free the memory allocated from per-device coherent memory pool
|
||||
@ -151,3 +152,4 @@ int dma_release_from_coherent(struct device *dev, int order, void *vaddr)
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(dma_release_from_coherent);
|
||||
|
||||
@ -30,8 +30,7 @@ again:
|
||||
return index;
|
||||
}
|
||||
|
||||
static inline void set_bit_area(unsigned long *map, unsigned long i,
|
||||
int len)
|
||||
void iommu_area_reserve(unsigned long *map, unsigned long i, int len)
|
||||
{
|
||||
unsigned long end = i + len;
|
||||
while (i < end) {
|
||||
@ -64,7 +63,7 @@ again:
|
||||
start = index + 1;
|
||||
goto again;
|
||||
}
|
||||
set_bit_area(map, index, nr);
|
||||
iommu_area_reserve(map, index, nr);
|
||||
}
|
||||
return index;
|
||||
}
|
||||
|
||||
@ -274,13 +274,14 @@ cleanup1:
|
||||
}
|
||||
|
||||
static int
|
||||
address_needs_mapping(struct device *hwdev, dma_addr_t addr)
|
||||
address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
|
||||
{
|
||||
dma_addr_t mask = 0xffffffff;
|
||||
/* If the device has a mask, use it, otherwise default to 32 bits */
|
||||
if (hwdev && hwdev->dma_mask)
|
||||
mask = *hwdev->dma_mask;
|
||||
return (addr & ~mask) != 0;
|
||||
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
|
||||
}
|
||||
|
||||
static int is_swiotlb_buffer(char *addr)
|
||||
{
|
||||
return addr >= io_tlb_start && addr < io_tlb_end;
|
||||
}
|
||||
|
||||
/*
|
||||
@ -467,15 +468,8 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
|
||||
void *ret;
|
||||
int order = get_order(size);
|
||||
|
||||
/*
|
||||
* XXX fix me: the DMA API should pass us an explicit DMA mask
|
||||
* instead, or use ZONE_DMA32 (ia64 overloads ZONE_DMA to be a ~32
|
||||
* bit range instead of a 16MB one).
|
||||
*/
|
||||
flags |= GFP_DMA;
|
||||
|
||||
ret = (void *)__get_free_pages(flags, order);
|
||||
if (ret && address_needs_mapping(hwdev, virt_to_bus(ret))) {
|
||||
if (ret && address_needs_mapping(hwdev, virt_to_bus(ret), size)) {
|
||||
/*
|
||||
* The allocated memory isn't reachable by the device.
|
||||
* Fall back on swiotlb_map_single().
|
||||
@ -490,19 +484,16 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
|
||||
* swiotlb_map_single(), which will grab memory from
|
||||
* the lowest available address range.
|
||||
*/
|
||||
dma_addr_t handle;
|
||||
handle = swiotlb_map_single(hwdev, NULL, size, DMA_FROM_DEVICE);
|
||||
if (swiotlb_dma_mapping_error(hwdev, handle))
|
||||
ret = map_single(hwdev, NULL, size, DMA_FROM_DEVICE);
|
||||
if (!ret)
|
||||
return NULL;
|
||||
|
||||
ret = bus_to_virt(handle);
|
||||
}
|
||||
|
||||
memset(ret, 0, size);
|
||||
dev_addr = virt_to_bus(ret);
|
||||
|
||||
/* Confirm address can be DMA'd by device */
|
||||
if (address_needs_mapping(hwdev, dev_addr)) {
|
||||
if (address_needs_mapping(hwdev, dev_addr, size)) {
|
||||
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
|
||||
(unsigned long long)*hwdev->dma_mask,
|
||||
(unsigned long long)dev_addr);
|
||||
@ -518,12 +509,11 @@ swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_handle)
|
||||
{
|
||||
WARN_ON(irqs_disabled());
|
||||
if (!(vaddr >= (void *)io_tlb_start
|
||||
&& vaddr < (void *)io_tlb_end))
|
||||
if (!is_swiotlb_buffer(vaddr))
|
||||
free_pages((unsigned long) vaddr, get_order(size));
|
||||
else
|
||||
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */
|
||||
swiotlb_unmap_single (hwdev, dma_handle, size, DMA_TO_DEVICE);
|
||||
unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -567,7 +557,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
|
||||
* we can safely return the device addr and not worry about bounce
|
||||
* buffering it.
|
||||
*/
|
||||
if (!address_needs_mapping(hwdev, dev_addr) && !swiotlb_force)
|
||||
if (!address_needs_mapping(hwdev, dev_addr, size) && !swiotlb_force)
|
||||
return dev_addr;
|
||||
|
||||
/*
|
||||
@ -584,7 +574,7 @@ swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,
|
||||
/*
|
||||
* Ensure that the address returned is DMA'ble
|
||||
*/
|
||||
if (address_needs_mapping(hwdev, dev_addr))
|
||||
if (address_needs_mapping(hwdev, dev_addr, size))
|
||||
panic("map_single: bounce buffer is not DMA'ble");
|
||||
|
||||
return dev_addr;
|
||||
@ -612,7 +602,7 @@ swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,
|
||||
char *dma_addr = bus_to_virt(dev_addr);
|
||||
|
||||
BUG_ON(dir == DMA_NONE);
|
||||
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
|
||||
if (is_swiotlb_buffer(dma_addr))
|
||||
unmap_single(hwdev, dma_addr, size, dir);
|
||||
else if (dir == DMA_FROM_DEVICE)
|
||||
dma_mark_clean(dma_addr, size);
|
||||
@ -642,7 +632,7 @@ swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
|
||||
char *dma_addr = bus_to_virt(dev_addr);
|
||||
|
||||
BUG_ON(dir == DMA_NONE);
|
||||
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
|
||||
if (is_swiotlb_buffer(dma_addr))
|
||||
sync_single(hwdev, dma_addr, size, dir, target);
|
||||
else if (dir == DMA_FROM_DEVICE)
|
||||
dma_mark_clean(dma_addr, size);
|
||||
@ -673,7 +663,7 @@ swiotlb_sync_single_range(struct device *hwdev, dma_addr_t dev_addr,
|
||||
char *dma_addr = bus_to_virt(dev_addr) + offset;
|
||||
|
||||
BUG_ON(dir == DMA_NONE);
|
||||
if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
|
||||
if (is_swiotlb_buffer(dma_addr))
|
||||
sync_single(hwdev, dma_addr, size, dir, target);
|
||||
else if (dir == DMA_FROM_DEVICE)
|
||||
dma_mark_clean(dma_addr, size);
|
||||
@ -727,7 +717,8 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
|
||||
for_each_sg(sgl, sg, nelems, i) {
|
||||
addr = SG_ENT_VIRT_ADDRESS(sg);
|
||||
dev_addr = virt_to_bus(addr);
|
||||
if (swiotlb_force || address_needs_mapping(hwdev, dev_addr)) {
|
||||
if (swiotlb_force ||
|
||||
address_needs_mapping(hwdev, dev_addr, sg->length)) {
|
||||
void *map = map_single(hwdev, addr, sg->length, dir);
|
||||
if (!map) {
|
||||
/* Don't panic here, we expect map_sg users
|
||||
|
||||
Loading…
Reference in New Issue
Block a user