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diff --git a/share/man/man9/Makefile b/share/man/man9/Makefile
--- a/share/man/man9/Makefile
+++ b/share/man/man9/Makefile
@@ -1795,6 +1795,7 @@
pci.9 pci_disable_io.9 \
pci.9 pci_enable_busmaster.9 \
pci.9 pci_enable_io.9 \
+ pci.9 pci_enable_pme.9 \
pci.9 pci_find_bsf.9 \
pci.9 pci_find_cap.9 \
pci.9 pci_find_dbsf.9 \
@@ -1807,6 +1808,7 @@
pci.9 pci_get_powerstate.9 \
pci.9 pci_get_vpd_ident.9 \
pci.9 pci_get_vpd_readonly.9 \
+ pci.9 pci_has_pm.9 \
pci.9 pci_iov_attach.9 \
pci.9 pci_iov_attach_name.9 \
pci.9 pci_iov_detach.9 \
diff --git a/share/man/man9/pci.9 b/share/man/man9/pci.9
--- a/share/man/man9/pci.9
+++ b/share/man/man9/pci.9
@@ -35,6 +35,7 @@
.Nm pci_disable_io ,
.Nm pci_enable_busmaster ,
.Nm pci_enable_io ,
+.Nm pci_enable_pme ,
.Nm pci_find_bsf ,
.Nm pci_find_cap ,
.Nm pci_find_dbsf ,
@@ -51,6 +52,7 @@
.Nm pci_get_powerstate ,
.Nm pci_get_vpd_ident ,
.Nm pci_get_vpd_readonly ,
+.Nm pci_has_pm ,
.Nm pci_iov_attach ,
.Nm pci_iov_attach_name ,
.Nm pci_iov_detach ,
@@ -92,6 +94,8 @@
.Fn pci_enable_busmaster "device_t dev"
.Ft int
.Fn pci_enable_io "device_t dev" "int space"
+.Ft void
+.Fn pci_enable_pme "device_t dev"
.Ft device_t
.Fn pci_find_bsf "uint8_t bus" "uint8_t slot" "uint8_t func"
.Ft int
@@ -124,6 +128,8 @@
.Fn pci_get_vpd_ident "device_t dev" "const char **identptr"
.Ft int
.Fn pci_get_vpd_readonly "device_t dev" "const char *kw" "const char **vptr"
+.Ft bool
+.Fn pci_has_pm "device_t dev"
.Ft int
.Fn pci_msi_count "device_t dev"
.Ft int
@@ -358,6 +364,12 @@
returns an error.
.Pp
The
+.Fn pci_has_pm
+function returns true if
+.Fa dev
+supports power management.
+.Pp
+The
.Fn pci_find_extcap
function is used to locate the first instance of a PCI-express
extended capability register set for the device
@@ -678,6 +690,11 @@
of power management events.
.Pp
The
+.Fn pci_enable_pme
+function is used to enable generation of power management events before
+suspending a device.
+.Pp
+The
.Fn pci_iov_attach
function is used to advertise that the given device
.Pq and associated device driver
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
--- a/sys/dev/pci/pci.c
+++ b/sys/dev/pci/pci.c
@@ -2951,6 +2951,32 @@
}
}
+/* Clear any active PME# and enable PME# generation. */
+void
+pci_enable_pme(device_t dev)
+{
+ struct pci_devinfo *dinfo = device_get_ivars(dev);
+ pcicfgregs *cfg = &dinfo->cfg;
+ uint16_t status;
+
+ if (cfg->pp.pp_location != 0) {
+ status = pci_read_config(dev, dinfo->cfg.pp.pp_location +
+ PCIR_POWER_STATUS, 2);
+ status |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE;
+ pci_write_config(dev, dinfo->cfg.pp.pp_location +
+ PCIR_POWER_STATUS, status, 2);
+ }
+}
+
+bool
+pci_has_pm(device_t dev)
+{
+ struct pci_devinfo *dinfo = device_get_ivars(dev);
+ pcicfgregs *cfg = &dinfo->cfg;
+
+ return (cfg->pp.pp_location != 0);
+}
+
/*
* Some convenience functions for PCI device drivers.
*/
diff --git a/sys/dev/pci/pcivar.h b/sys/dev/pci/pcivar.h
--- a/sys/dev/pci/pcivar.h
+++ b/sys/dev/pci/pcivar.h
@@ -685,6 +685,8 @@
int pci_set_max_read_req(device_t dev, int size);
int pci_power_reset(device_t dev);
void pci_clear_pme(device_t dev);
+void pci_enable_pme(device_t dev);
+bool pci_has_pm(device_t dev);
uint32_t pcie_read_config(device_t dev, int reg, int width);
void pcie_write_config(device_t dev, int reg, uint32_t value, int width);
uint32_t pcie_adjust_config(device_t dev, int reg, uint32_t mask,

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