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head/share/man/man4/pci.4
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| .Er EINVAL . | .Er EINVAL . | ||||
| .El | .El | ||||
| .El | .El | ||||
| .It PCIOCREAD | .It PCIOCREAD | ||||
| This | This | ||||
| .Xr ioctl 2 | .Xr ioctl 2 | ||||
| reads the | reads the | ||||
| .Tn PCI | .Tn PCI | ||||
| configuration registers specified by the passed-in | configuration register specified by the passed-in | ||||
| .Va pci_io | .Va pci_io | ||||
| structure. | structure. | ||||
| The | The | ||||
| .Va pci_io | .Va pci_io | ||||
| structure consists of the following fields: | structure consists of the following fields: | ||||
| .Bl -tag -width pi_width | .Bl -tag -width pi_width | ||||
| .It pi_sel | .It pi_sel | ||||
| A | A | ||||
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| .It pi_data | .It pi_data | ||||
| The data returned by the kernel. | The data returned by the kernel. | ||||
| .El | .El | ||||
| .It PCIOCWRITE | .It PCIOCWRITE | ||||
| This | This | ||||
| .Xr ioctl 2 | .Xr ioctl 2 | ||||
| allows users to write to the | allows users to write to the | ||||
| .Tn PCI | .Tn PCI | ||||
| specified in the passed-in | configuration register specified in the passed-in | ||||
| .Va pci_io | .Va pci_io | ||||
| structure. | structure. | ||||
| The | The | ||||
| .Va pci_io | .Va pci_io | ||||
| structure is described above. | structure is described above. | ||||
| The limitations on data width described for | The limitations on data width described for | ||||
| reading registers, above, also apply to writing | reading registers, above, also apply to writing | ||||
| .Tn PCI | .Tn PCI | ||||
| configuration registers. | configuration registers. | ||||
| .It PCIOCATTACHED | .It PCIOCATTACHED | ||||
| This | This | ||||
| .Xr ioctl 2 | .Xr ioctl 2 | ||||
| allows users to query if a driver is attached to the | allows users to query if a driver is attached to the | ||||
| .Tn PCI | .Tn PCI | ||||
| specified in the passed-in | device specified in the passed-in | ||||
| .Va pci_io | .Va pci_io | ||||
| structure. | structure. | ||||
| The | The | ||||
| .Va pci_io | .Va pci_io | ||||
| structure is described above, however, the | structure is described above, however, the | ||||
| .Va pi_reg | .Va pi_reg | ||||
| and | and | ||||
| .Va pi_width | .Va pi_width | ||||
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