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fllindenabuehaze14
fllinden
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abuehaze14
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igb_uio: add
Add the igb_uio driver from DPDK, used by some of our customers. Imported from: http://git.dpdk.org/dpdk-kmods/ @ e13d7af77a1bf98757f85c3c4083f6ee6d0d2372 Kbuild file replaced by a regular kernel module Makefile. Signed-off-by: Frank van der Linden <fllinden@amazon.com>
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‎drivers/amazon/Kconfig‎

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@@ -30,4 +30,13 @@ config AMAZON_EFA_INFINIBAND
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To compile this driver as a module, choose M here.
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The module will be called efa
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config AMAZON_IGB_UIO
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tristate "DPDK igb_uio driver"
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help
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This is the direct PCI access driver for igb and
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other PCI network devices, for DPDK.
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To compile this driver as a module, choose M here.
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The module will be called igb_uio.
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endif # AMAZON_DRIVER_UPDATES

‎drivers/amazon/net/Makefile‎

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@@ -3,3 +3,4 @@
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#
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obj-$(CONFIG_AMAZON_ENA_ETHERNET) += ena/
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obj-$(CONFIG_AMAZON_EFA_INFINIBAND) += efa/
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obj-$(CONFIG_AMAZON_IGB_UIO) += igb_uio/

‎drivers/amazon/net/igb_uio/Makefile‎

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obj-$(CONFIG_AMAZON_IGB_UIO) += igb_uio.o

‎drivers/amazon/net/igb_uio/compat.h‎

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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Minimal wrappers to allow compiling igb_uio on older kernels.
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*/
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#ifndef RHEL_RELEASE_VERSION
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#define RHEL_RELEASE_VERSION(a, b) (((a) << 8) + (b))
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0)
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#define pci_cfg_access_lock pci_block_user_cfg_access
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#define pci_cfg_access_unlock pci_unblock_user_cfg_access
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 18, 0)
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#define HAVE_PTE_MASK_PAGE_IOMAP
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#endif
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#ifndef PCI_MSIX_ENTRY_SIZE
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#define PCI_MSIX_ENTRY_SIZE 16
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#define PCI_MSIX_ENTRY_VECTOR_CTRL 12
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#define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
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#endif
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/*
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* for kernels < 2.6.38 and backported patch that moves MSI-X entry definition
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* to pci_regs.h Those kernels has PCI_MSIX_ENTRY_SIZE defined but not
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* PCI_MSIX_ENTRY_CTRL_MASKBIT
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*/
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#ifndef PCI_MSIX_ENTRY_CTRL_MASKBIT
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#define PCI_MSIX_ENTRY_CTRL_MASKBIT 1
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#endif
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34) && \
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(!(defined(RHEL_RELEASE_CODE) && \
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RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(5, 9)))
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static int pci_num_vf(struct pci_dev *dev)
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{
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struct iov {
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int pos;
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int nres;
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u32 cap;
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u16 ctrl;
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u16 total;
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u16 initial;
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u16 nr_virtfn;
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} *iov = (struct iov *)dev->sriov;
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if (!dev->is_physfn)
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return 0;
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return iov->nr_virtfn;
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}
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#endif /* < 2.6.34 */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39) && \
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(!(defined(RHEL_RELEASE_CODE) && \
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RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 4)))
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#define kstrtoul strict_strtoul
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#endif /* < 2.6.39 */
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#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 3, 0) && \
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(!(defined(RHEL_RELEASE_CODE) && \
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RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 3)))
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/* Check if INTX works to control irq's.
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* Set's INTX_DISABLE flag and reads it back
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*/
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static bool pci_intx_mask_supported(struct pci_dev *pdev)
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{
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bool mask_supported = false;
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uint16_t orig, new;
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pci_block_user_cfg_access(pdev);
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pci_read_config_word(pdev, PCI_COMMAND, &orig);
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pci_write_config_word(pdev, PCI_COMMAND,
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orig ^ PCI_COMMAND_INTX_DISABLE);
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pci_read_config_word(pdev, PCI_COMMAND, &new);
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if ((new ^ orig) & ~PCI_COMMAND_INTX_DISABLE) {
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dev_err(&pdev->dev, "Command register changed from "
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"0x%x to 0x%x: driver or hardware bug?\n", orig, new);
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} else if ((new ^ orig) & PCI_COMMAND_INTX_DISABLE) {
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mask_supported = true;
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pci_write_config_word(pdev, PCI_COMMAND, orig);
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}
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pci_unblock_user_cfg_access(pdev);
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return mask_supported;
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}
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static bool pci_check_and_mask_intx(struct pci_dev *pdev)
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{
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bool pending;
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uint32_t status;
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pci_block_user_cfg_access(pdev);
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pci_read_config_dword(pdev, PCI_COMMAND, &status);
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/* interrupt is not ours, goes to out */
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pending = (((status >> 16) & PCI_STATUS_INTERRUPT) != 0);
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if (pending) {
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uint16_t old, new;
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old = status;
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if (status != 0)
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new = old & (~PCI_COMMAND_INTX_DISABLE);
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else
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new = old | PCI_COMMAND_INTX_DISABLE;
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if (old != new)
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pci_write_config_word(pdev, PCI_COMMAND, new);
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}
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pci_unblock_user_cfg_access(pdev);
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return pending;
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}
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#endif /* < 3.3.0 */
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
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#define HAVE_PCI_IS_BRIDGE_API 1
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 3, 0)
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#define HAVE_MSI_LIST_IN_GENERIC_DEVICE 1
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 5, 0)
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#define HAVE_PCI_MSI_MASK_IRQ 1
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0)
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#define HAVE_ALLOC_IRQ_VECTORS 1
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#endif
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static inline bool igbuio_kernel_is_locked_down(void)
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{
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#ifdef CONFIG_LOCK_DOWN_KERNEL
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#ifdef CONFIG_LOCK_DOWN_IN_EFI_SECURE_BOOT
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return kernel_is_locked_down(NULL);
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#elif defined(CONFIG_EFI_SECURE_BOOT_LOCK_DOWN)
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return kernel_is_locked_down();
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#else
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return false;
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#endif
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#else
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return false;
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#endif
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}

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