Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / linuxapp / igb_uio / compat.h

diff --git a/lib/librte_eal/linuxapp/igb_uio/compat.h b/lib/librte_eal/linuxapp/igb_uio/compat.h
new file mode 100644 (file)
index 0000000..c1d45a6
--- /dev/null
+++ b/lib/librte_eal/linuxapp/igb_uio/compat.h
@@ -0,0 +1,116 @@
+/*
+ * Minimal wrappers to allow compiling igb_uio on older kernels.
+ */
+
+#ifndef RHEL_RELEASE_VERSION
+#define RHEL_RELEASE_VERSION(a, b) (((a) << 8) + (b))
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
+#define pci_cfg_access_lock   pci_block_user_cfg_access
+#define pci_cfg_access_unlock pci_unblock_user_cfg_access
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
+#define HAVE_PTE_MASK_PAGE_IOMAP
+#endif
+
+#ifndef PCI_MSIX_ENTRY_SIZE
+#define PCI_MSIX_ENTRY_SIZE             16
+#define  PCI_MSIX_ENTRY_LOWER_ADDR      0
+#define  PCI_MSIX_ENTRY_UPPER_ADDR      4
+#define  PCI_MSIX_ENTRY_DATA            8
+#define  PCI_MSIX_ENTRY_VECTOR_CTRL     12
+#define   PCI_MSIX_ENTRY_CTRL_MASKBIT   1
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
+       (!(defined(RHEL_RELEASE_CODE) && \
+        RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 9)))
+
+static int pci_num_vf(struct pci_dev *dev)
+{
+       struct iov {
+               int pos;
+               int nres;
+               u32 cap;
+               u16 ctrl;
+               u16 total;
+               u16 initial;
+               u16 nr_virtfn;
+       } *iov = (struct iov *)dev->sriov;
+
+       if (!dev->is_physfn)
+               return 0;
+
+       return iov->nr_virtfn;
+}
+
+#endif /* < 2.6.34 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) && \
+       (!(defined(RHEL_RELEASE_CODE) && \
+          RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 4)))
+
+#define kstrtoul strict_strtoul
+
+#endif /* < 2.6.39 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) && \
+       (!(defined(RHEL_RELEASE_CODE) && \
+          RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 3)))
+
+/* Check if INTX works to control irq's.
+ * Set's INTX_DISABLE flag and reads it back
+ */
+static bool pci_intx_mask_supported(struct pci_dev *pdev)
+{
+       bool mask_supported = false;
+       uint16_t orig, new;
+
+       pci_block_user_cfg_access(pdev);
+       pci_read_config_word(pdev, PCI_COMMAND, &orig);
+       pci_write_config_word(pdev, PCI_COMMAND,
+                             orig ^ PCI_COMMAND_INTX_DISABLE);
+       pci_read_config_word(pdev, PCI_COMMAND, &new);
+
+       if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
+               dev_err(&pdev->dev, "Command register changed from "
+                       "0x%x to 0x%x: driver or hardware bug?\n", orig, new);
+       } else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
+               mask_supported = true;
+               pci_write_config_word(pdev, PCI_COMMAND, orig);
+       }
+       pci_unblock_user_cfg_access(pdev);
+
+       return mask_supported;
+}
+
+static bool pci_check_and_mask_intx(struct pci_dev *pdev)
+{
+       bool pending;
+       uint32_t status;
+
+       pci_block_user_cfg_access(pdev);
+       pci_read_config_dword(pdev, PCI_COMMAND, &status);
+
+       /* interrupt is not ours, goes to out */
+       pending = (((status >> 16) & PCI_STATUS_INTERRUPT) != 0);
+       if (pending) {
+               uint16_t old, new;
+
+               old = status;
+               if (status != 0)
+                       new = old & (~PCI_COMMAND_INTX_DISABLE);
+               else
+                       new = old | PCI_COMMAND_INTX_DISABLE;
+
+               if (old != new)
+                       pci_write_config_word(pdev, PCI_COMMAND, new);
+       }
+       pci_unblock_user_cfg_access(pdev);
+
+       return pending;
+}
+
+#endif /* < 3.3.0 */