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_LOWER_ADDR 0
21 #define PCI_MSIX_ENTRY_UPPER_ADDR 4
22 #define PCI_MSIX_ENTRY_DATA 8
23 #define PCI_MSIX_ENTRY_VECTOR_CTRL 12
24 #define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
27 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
28 (!(defined(RHEL_RELEASE_CODE) && \
29 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 9)))
31 static int pci_num_vf(struct pci_dev *dev)
41 } *iov = (struct iov *)dev->sriov;
46 return iov->nr_virtfn;
51 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) && \
52 (!(defined(RHEL_RELEASE_CODE) && \
53 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 4)))
55 #define kstrtoul strict_strtoul
59 #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) && \
60 (!(defined(RHEL_RELEASE_CODE) && \
61 RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 3)))
63 /* Check if INTX works to control irq's.
64 * Set's INTX_DISABLE flag and reads it back
66 static bool pci_intx_mask_supported(struct pci_dev *pdev)
68 bool mask_supported = false;
71 pci_block_user_cfg_access(pdev);
72 pci_read_config_word(pdev, PCI_COMMAND, &orig);
73 pci_write_config_word(pdev, PCI_COMMAND,
74 orig ^ PCI_COMMAND_INTX_DISABLE);
75 pci_read_config_word(pdev, PCI_COMMAND, &new);
77 if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
78 dev_err(&pdev->dev, "Command register changed from "
79 "0x%x to 0x%x: driver or hardware bug?\n", orig, new);
80 } else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
81 mask_supported = true;
82 pci_write_config_word(pdev, PCI_COMMAND, orig);
84 pci_unblock_user_cfg_access(pdev);
86 return mask_supported;
89 static bool pci_check_and_mask_intx(struct pci_dev *pdev)
94 pci_block_user_cfg_access(pdev);
95 pci_read_config_dword(pdev, PCI_COMMAND, &status);
97 /* interrupt is not ours, goes to out */
98 pending = (((status >> 16) & PCI_STATUS_INTERRUPT) != 0);
104 new = old & (~PCI_COMMAND_INTX_DISABLE);
106 new = old | PCI_COMMAND_INTX_DISABLE;
109 pci_write_config_word(pdev, PCI_COMMAND, new);
111 pci_unblock_user_cfg_access(pdev);