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| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2021-03-16 15:06:42 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2021-03-24 07:59:58 +0000 |
| commit | 7cf565b2c5f0ed90eecd52b0fde8b81b746d662e (patch) | |
| tree | 2dadc58ec4695fbcdc238b80a71a6c1adee462cc | |
| parent | d00a723a2a5c1cd686fdab4b6d9c5084705d7182 (diff) | |
| download | src-7cf565b2c5f0ed90eecd52b0fde8b81b746d662e.tar.gz src-7cf565b2c5f0ed90eecd52b0fde8b81b746d662e.zip | |
Implement pci_get_relaxed_ordering_enabled() helper function.
Discussed with: kib@
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking
(cherry picked from commit 1acf24a044aaa0391c61af4abe7e018c3bf8a37c)
| -rw-r--r-- | sys/dev/pci/pci.c | 15 | ||||
| -rw-r--r-- | sys/dev/pci/pcivar.h | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index 644336562a3b..f3a0309c5202 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -2161,6 +2161,21 @@ pci_ht_map_msi(device_t dev, uint64_t addr) } int +pci_get_relaxed_ordering_enabled(device_t dev) +{ + struct pci_devinfo *dinfo = device_get_ivars(dev); + int cap; + uint16_t val; + + cap = dinfo->cfg.pcie.pcie_location; + if (cap == 0) + return (0); + val = pci_read_config(dev, cap + PCIER_DEVICE_CTL, 2); + val &= PCIEM_CTL_RELAXED_ORD_ENABLE; + return (val != 0); +} + +int pci_get_max_payload(device_t dev) { struct pci_devinfo *dinfo = device_get_ivars(dev); diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h index 65f37a85edd7..b3126ad8dc51 100644 --- a/sys/dev/pci/pcivar.h +++ b/sys/dev/pci/pcivar.h @@ -670,6 +670,7 @@ int pci_msix_device_blacklisted(device_t dev); void pci_ht_map_msi(device_t dev, uint64_t addr); device_t pci_find_pcie_root_port(device_t dev); +int pci_get_relaxed_ordering_enabled(device_t dev); int pci_get_max_payload(device_t dev); int pci_get_max_read_req(device_t dev); void pci_restore_state(device_t dev); |