Date: Thu, 7 Sep 2023 21:06:56 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: dde83fc4d2e6 - stable/14 - pci_iov: Refuse to create VFs which require ARI if ARI is not available Message-ID: <202309072106.387L6um6031279@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch stable/14 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=dde83fc4d2e6e8a3009bdfb7d14dcc8ef802b22f commit dde83fc4d2e6e8a3009bdfb7d14dcc8ef802b22f Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2023-09-01 21:18:30 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2023-09-07 21:06:33 +0000 pci_iov: Refuse to create VFs which require ARI if ARI is not available If a parent downstream port doesn't support ARI, the code would try to create VFs anyway but then all PCI config space access to those VFs would fail. Tested by: np Approved by: re (kib) Sponsored by: Chelsio Communications (cherry picked from commit 7063f94283af60818429a0c2d70e80ae4ad5c146) --- sys/dev/pci/pci_iov.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/sys/dev/pci/pci_iov.c b/sys/dev/pci/pci_iov.c index db7210cb729a..ff3ac0e64271 100644 --- a/sys/dev/pci/pci_iov.c +++ b/sys/dev/pci/pci_iov.c @@ -435,7 +435,7 @@ out: * affects all PFs on the device. */ static int -pci_iov_set_ari(device_t bus) +pci_iov_set_ari(device_t bus, bool *ari_enabled) { device_t lowest; device_t *devlist; @@ -443,8 +443,10 @@ pci_iov_set_ari(device_t bus) uint16_t iov_ctl; /* If ARI is disabled on the downstream port there is nothing to do. */ - if (!PCIB_ARI_ENABLED(device_get_parent(bus))) + if (!PCIB_ARI_ENABLED(device_get_parent(bus))) { + *ari_enabled = false; return (0); + } error = device_get_children(bus, &devlist, &devcount); @@ -480,6 +482,7 @@ pci_iov_set_ari(device_t bus) device_printf(lowest, "failed to enable ARI\n"); return (ENXIO); } + *ari_enabled = true; return (0); } @@ -683,6 +686,7 @@ pci_iov_config(struct cdev *cdev, struct pci_iov_arg *arg) uint16_t iov_ctl; uint16_t num_vfs, total_vfs; int iov_inited; + bool ari_enabled; mtx_lock(&Giant); dinfo = cdev->si_drv1; @@ -713,7 +717,7 @@ pci_iov_config(struct cdev *cdev, struct pci_iov_arg *arg) if (error != 0) goto out; - error = pci_iov_set_ari(bus); + error = pci_iov_set_ari(bus, &ari_enabled); if (error != 0) goto out; @@ -736,6 +740,11 @@ pci_iov_config(struct cdev *cdev, struct pci_iov_arg *arg) goto out; } + if (!ari_enabled && PCI_RID2SLOT(last_rid) != 0) { + error = ENOSPC; + goto out; + } + iov_ctl = IOV_READ(dinfo, PCIR_SRIOV_CTL, 2); iov_ctl &= ~(PCIM_SRIOV_VF_EN | PCIM_SRIOV_VF_MSE); IOV_WRITE(dinfo, PCIR_SRIOV_CTL, iov_ctl, 2);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202309072106.387L6um6031279>