xen: core library changes

[dpdk.git] / lib / librte_eal / linuxapp / igb_uio / igb_uio.c

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index 61c004b..24f93a5 100644 (file)
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -30,6 +30,10 @@
 #include <linux/msi.h>
 #include <linux/version.h>
 
+#ifdef CONFIG_XEN_DOM0 
+#include <xen/xen.h>
+#endif
+
 /**
  * MSI-X related macros, copy from linux/pci_regs.h in kernel 2.6.39,
  * but none of them in kernel 2.6.35.
@@ -312,6 +316,48 @@ spin_unlock:
        return ret;
 }
 
+#ifdef CONFIG_XEN_DOM0
+static int
+igbuio_dom0_mmap_phys(struct uio_info *info, struct vm_area_struct *vma)
+{
+       int idx;
+       idx = (int)vma->vm_pgoff;
+       vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+       vma->vm_page_prot.pgprot |= _PAGE_IOMAP;
+
+       return remap_pfn_range(vma,
+                       vma->vm_start,
+                       info->mem[idx].addr >> PAGE_SHIFT,
+                       vma->vm_end - vma->vm_start,
+                       vma->vm_page_prot);
+}
+
+/**
+ * This is uio device mmap method which will use igbuio mmap for Xen 
+ * Dom0 enviroment.
+ */
+static int
+igbuio_dom0_pci_mmap(struct uio_info *info, struct vm_area_struct *vma)
+{
+       int idx;
+
+       if (vma->vm_pgoff >= MAX_UIO_MAPS) 
+               return -EINVAL;
+       if(info->mem[vma->vm_pgoff].size == 0)
+               return  -EINVAL;
+
+       idx = (int)vma->vm_pgoff;
+       switch (info->mem[idx].memtype) {
+       case UIO_MEM_PHYS:
+               return igbuio_dom0_mmap_phys(info, vma);
+       case UIO_MEM_LOGICAL:
+       case UIO_MEM_VIRTUAL:
+       default:
+               return -EINVAL;
+       }
+}       
+#endif
+
 /* Remap pci resources described by bar #pci_bar in uio resource n. */
 static int
 igbuio_pci_setup_iomem(struct pci_dev *dev, struct uio_info *info,
@@ -462,6 +508,11 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
        udev->info.version = "0.1";
        udev->info.handler = igbuio_pci_irqhandler;
        udev->info.irqcontrol = igbuio_pci_irqcontrol;
+#ifdef CONFIG_XEN_DOM0
+       /* check if the driver run on Xen Dom0 */
+       if (xen_initial_domain())
+               udev->info.mmap = igbuio_dom0_pci_mmap;
+#endif
        udev->info.priv = udev;
        udev->pdev = dev;
        udev->mode = 0; /* set the default value for interrupt mode */