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Use the correct location of the SRIOV capability when enabling ARI.

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While here, check if ARI was enabled by re-reading the config register
after writing it and return an error if the write fails.

Reviewed by:	rstone, vangyzen
This commit is contained in:
John Baldwin 2016-05-03 19:37:25 +00:00
parent b8721c1643
commit b83c5d07c1
1 changed files with 8 additions and 3 deletions
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11
sys/dev/pci/pci_iov.c
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@ -442,6 +442,7 @@ pci_iov_set_ari(device_t bus)
}
}
}
free(devlist, M_TEMP);
/*
* If we called this function some device must have the SR-IOV
@ -451,10 +452,14 @@ pci_iov_set_ari(device_t bus)
("Could not find child of %s with SR-IOV capability",
device_get_nameunit(bus)));
iov_ctl = pci_read_config(lowest, iov_pos + PCIR_SRIOV_CTL, 2);
iov_ctl = pci_read_config(lowest, lowest_pos + PCIR_SRIOV_CTL, 2);
iov_ctl |= PCIM_SRIOV_ARI_EN;
pci_write_config(lowest, iov_pos + PCIR_SRIOV_CTL, iov_ctl, 2);
free(devlist, M_TEMP);
pci_write_config(lowest, lowest_pos + PCIR_SRIOV_CTL, iov_ctl, 2);
if ((pci_read_config(lowest, lowest_pos + PCIR_SRIOV_CTL, 2) &
PCIM_SRIOV_ARI_EN) == 0) {
device_printf(lowest, "failed to enable ARI\n");
return (ENXIO);
}
return (0);
}