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Allow child devices of vgapci(4) to query VPD strings and use MSI/MSI-X

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interrupts.  For the MSI/MSI-X case, we only allow 1 child device to use
MSI or MSI-X at a time.

Tested by:	rnoland
This commit is contained in:
jhb 2008-09-16 19:52:02 +00:00
parent 5657e9d778
commit 423433a5d7
1 changed files with 99 additions and 1 deletions
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100
sys/dev/pci/vga_pci.c
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@ -46,6 +46,10 @@ __FBSDID("$FreeBSD$");
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
struct vga_pci_softc {
device_t vga_msi_child; /* Child driver using MSI. */
};
static int
vga_pci_probe(device_t dev)
{
@ -175,6 +179,21 @@ vga_pci_disable_io(device_t dev, device_t child, int space)
return (pci_disable_io(dev, space));
}
static int
vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr)
{
return (pci_get_vpd_ident(dev, identptr));
}
static int
vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw,
const char **vptr)
{
return (pci_get_vpd_readonly(dev, kw, vptr));
}
static int
vga_pci_set_powerstate(device_t dev, device_t child, int state)
{
@ -210,6 +229,77 @@ vga_pci_find_extcap(device_t dev, device_t child, int capability,
return (pci_find_extcap(dev, capability, capreg));
}
static int
vga_pci_alloc_msi(device_t dev, device_t child, int *count)
{
struct vga_pci_softc *sc;
int error;
sc = device_get_softc(dev);
if (sc->vga_msi_child != NULL)
return (EBUSY);
error = pci_alloc_msi(dev, count);
if (error == 0)
sc->vga_msi_child = child;
return (error);
}
static int
vga_pci_alloc_msix(device_t dev, device_t child, int *count)
{
struct vga_pci_softc *sc;
int error;
sc = device_get_softc(dev);
if (sc->vga_msi_child != NULL)
return (EBUSY);
error = pci_alloc_msix(dev, count);
if (error == 0)
sc->vga_msi_child = child;
return (error);
}
static int
vga_pci_remap_msix(device_t dev, device_t child, int count,
const u_int *vectors)
{
struct vga_pci_softc *sc;
sc = device_get_softc(dev);
if (sc->vga_msi_child != child)
return (ENXIO);
return (pci_remap_msix(dev, count, vectors));
}
static int
vga_pci_release_msi(device_t dev, device_t child)
{
struct vga_pci_softc *sc;
int error;
sc = device_get_softc(dev);
if (sc->vga_msi_child != child)
return (ENXIO);
error = pci_release_msi(dev);
if (error == 0)
sc->vga_msi_child = NULL;
return (error);
}
static int
vga_pci_msi_count(device_t dev, device_t child)
{
return (pci_msi_count(dev));
}
static int
vga_pci_msix_count(device_t dev, device_t child)
{
return (pci_msix_count(dev));
}
static device_method_t vga_pci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, vga_pci_probe),
@ -236,10 +326,18 @@ static device_method_t vga_pci_methods[] = {
DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster),
DEVMETHOD(pci_enable_io, vga_pci_enable_io),
DEVMETHOD(pci_disable_io, vga_pci_disable_io),
DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident),
DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly),
DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate),
DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate),
DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt),
DEVMETHOD(pci_find_extcap, vga_pci_find_extcap),
DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi),
DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix),
DEVMETHOD(pci_remap_msix, vga_pci_remap_msix),
DEVMETHOD(pci_release_msi, vga_pci_release_msi),
DEVMETHOD(pci_msi_count, vga_pci_msi_count),
DEVMETHOD(pci_msix_count, vga_pci_msix_count),
{ 0, 0 }
};
@ -247,7 +345,7 @@ static device_method_t vga_pci_methods[] = {
static driver_t vga_pci_driver = {
"vgapci",
vga_pci_methods,
1,
sizeof(struct vga_pci_softc),
};
static devclass_t vga_devclass;