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 #ifndef PCI_MSIX_ENTRY_SIZE
19 #define PCI_MSIX_ENTRY_SIZE 16
20 #define PCI_MSIX_ENTRY_VECTOR_CTRL 12
21 #define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
25 * for kernels < 2.6.38 and backported patch that moves MSI-X entry definition
26 * to pci_regs.h Those kernels has PCI_MSIX_ENTRY_SIZE defined but not
27 * PCI_MSIX_ENTRY_CTRL_MASKBIT
29 #ifndef PCI_MSIX_ENTRY_CTRL_MASKBIT
30 #define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
33 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
34 (!(defined(RHEL_RELEASE_CODE) && \
35 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 9)))
37 static int pci_num_vf(struct pci_dev *dev)
47 } *iov = (struct iov *)dev->sriov;
52 return iov->nr_virtfn;
57 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) && \
58 (!(defined(RHEL_RELEASE_CODE) && \
59 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 4)))
61 #define kstrtoul strict_strtoul
65 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) && \
66 (!(defined(RHEL_RELEASE_CODE) && \
67 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 3)))
69 /* Check if INTX works to control irq's.
70 * Set's INTX_DISABLE flag and reads it back
72 static bool pci_intx_mask_supported(struct pci_dev *pdev)
74 bool mask_supported = false;
77 pci_block_user_cfg_access(pdev);
78 pci_read_config_word(pdev, PCI_COMMAND, &orig);
79 pci_write_config_word(pdev, PCI_COMMAND,
80 orig ^ PCI_COMMAND_INTX_DISABLE);
81 pci_read_config_word(pdev, PCI_COMMAND, &new);
83 if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
84 dev_err(&pdev->dev, "Command register changed from "
85 "0x%x to 0x%x: driver or hardware bug?\n", orig, new);
86 } else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
87 mask_supported = true;
88 pci_write_config_word(pdev, PCI_COMMAND, orig);
90 pci_unblock_user_cfg_access(pdev);
92 return mask_supported;
95 static bool pci_check_and_mask_intx(struct pci_dev *pdev)
100 pci_block_user_cfg_access(pdev);
101 pci_read_config_dword(pdev, PCI_COMMAND, &status);
103 /* interrupt is not ours, goes to out */
104 pending = (((status >> 16) & PCI_STATUS_INTERRUPT) != 0);
110 new = old & (~PCI_COMMAND_INTX_DISABLE);
112 new = old | PCI_COMMAND_INTX_DISABLE;
115 pci_write_config_word(pdev, PCI_COMMAND, new);
117 pci_unblock_user_cfg_access(pdev);
124 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
125 #define HAVE_PCI_IS_BRIDGE_API 1
128 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
129 #define HAVE_ALLOC_IRQ_VECTORS 1
132 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)
133 #define HAVE_MSI_LIST_IN_GENERIC_DEVICE 1
136 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)
137 #define HAVE_PCI_MSI_MASK_IRQ 1