1PCI_ENABLE_ATOMIC_OP(9)       Hardware Interfaces      PCI_ENABLE_ATOMIC_OP(9)
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NAME

6       pci_enable_atomic_ops_to_root - enable AtomicOp requests to root port
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SYNOPSIS

9       int pci_enable_atomic_ops_to_root(struct pci_dev * dev, u32 cap_mask);
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ARGUMENTS

12       dev
13           the PCI device
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15       cap_mask
16           mask of desired AtomicOp sizes, including one or more of:
17           PCI_EXP_DEVCAP2_ATOMIC_COMP32 PCI_EXP_DEVCAP2_ATOMIC_COMP64
18           PCI_EXP_DEVCAP2_ATOMIC_COMP128
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DESCRIPTION

21       Return 0 if all upstream bridges support AtomicOp routing, egress
22       blocking is disabled on all upstream ports, and the root port supports
23       the requested completion capabilities (32-bit, 64-bit and/or 128-bit
24       AtomicOp completion), or negative otherwise.
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27Kernel Hackers Manual 3.10         June 2019           PCI_ENABLE_ATOMIC_OP(9)
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