1 files changed, 16 insertions, 0 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
index a1e0ac8..4ceb075 100644
--- a/sys/dev/pci/pci.c
+++ b/sys/dev/pci/pci.c
@@ -1881,6 +1881,22 @@ pci_ht_map_msi(device_t dev, uint64_t addr)
 }
 
 int
+pci_get_max_payload(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_MAX_PAYLOAD;
+	val >>= 5;
+	return (1 << (val + 7));
+}
+
+int
 pci_get_max_read_req(device_t dev)
 {
 	struct pci_devinfo *dinfo = device_get_ivars(dev);