2 * Minimal wrappers to allow compiling igb_uio on older kernels.
5 #ifndef RHEL_RELEASE_VERSION
6 #define RHEL_RELEASE_VERSION(a, b) (((a) << 8) + (b))
9 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
10 #define pci_cfg_access_lock pci_block_user_cfg_access
11 #define pci_cfg_access_unlock pci_unblock_user_cfg_access
14 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
15 #define HAVE_PTE_MASK_PAGE_IOMAP
18 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
19 (!(defined(RHEL_RELEASE_CODE) && \
20 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 9)))
22 static int pci_num_vf(struct pci_dev *dev)
32 } *iov = (struct iov *)dev->sriov;
37 return iov->nr_virtfn;
42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) && \
43 (!(defined(RHEL_RELEASE_CODE) && \
44 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 4)))
46 #define kstrtoul strict_strtoul
50 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) && \
51 (!(defined(RHEL_RELEASE_CODE) && \
52 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 3)))
54 /* Check if INTX works to control irq's.
55 * Set's INTX_DISABLE flag and reads it back
57 static bool pci_intx_mask_supported(struct pci_dev *pdev)
59 bool mask_supported = false;
62 pci_block_user_cfg_access(pdev);
63 pci_read_config_word(pdev, PCI_COMMAND, &orig);
64 pci_write_config_word(pdev, PCI_COMMAND,
65 orig ^ PCI_COMMAND_INTX_DISABLE);
66 pci_read_config_word(pdev, PCI_COMMAND, &new);
68 if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
69 dev_err(&pdev->dev, "Command register changed from "
70 "0x%x to 0x%x: driver or hardware bug?\n", orig, new);
71 } else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
72 mask_supported = true;
73 pci_write_config_word(pdev, PCI_COMMAND, orig);
75 pci_unblock_user_cfg_access(pdev);
77 return mask_supported;
80 static bool pci_check_and_mask_intx(struct pci_dev *pdev)
85 pci_block_user_cfg_access(pdev);
86 pci_read_config_dword(pdev, PCI_COMMAND, &status);
88 /* interrupt is not ours, goes to out */
89 pending = (((status >> 16) & PCI_STATUS_INTERRUPT) != 0);
95 new = old & (~PCI_COMMAND_INTX_DISABLE);
97 new = old | PCI_COMMAND_INTX_DISABLE;
100 pci_write_config_word(pdev, PCI_COMMAND, new);
102 pci_unblock_user_cfg_access(pdev);
109 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
110 #define HAVE_ALLOC_IRQ_VECTORS 1
113 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 19, 0)
114 #define HAVE_PCI_MSI_MASK_IRQ 1
117 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
118 #define HAVE_IRQ_DATA 1