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authordfr <dfr@FreeBSD.org>2000-06-09 16:04:30 +0000
committerdfr <dfr@FreeBSD.org>2000-06-09 16:04:30 +0000
commitab33dfac0143d5afabdb2d640b8d7d47c43609f4 (patch)
tree7d9995e89a1113f6d052f26ef4daa5686f8efb76 /sys/pci/agp_sis.c
parentfe0cef0780df985c05e3db3351ed16ef482b7c6a (diff)
downloadFreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.zip
FreeBSD-src-ab33dfac0143d5afabdb2d640b8d7d47c43609f4.tar.gz
A driver for programming the AGP hardware. This is only very lightly
tested on Intel BX chipsets only. The other agp minidrivers are totally untested. The programming api is a subset of the Linux api and is only intended to be enough for the X server to use. There is also an in-kernel api for the use of other kernel modules such as the 3D DRI.
Diffstat (limited to 'sys/pci/agp_sis.c')
-rw-r--r--sys/pci/agp_sis.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/sys/pci/agp_sis.c b/sys/pci/agp_sis.c
new file mode 100644
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+++ b/sys/pci/agp_sis.c
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+/*-
+ * Copyright (c) 2000 Doug Rabson
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include "opt_bus.h"
+#include "opt_pci.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/lock.h>
+
+#include <pci/pcivar.h>
+#include <pci/pcireg.h>
+#include <pci/agppriv.h>
+#include <pci/agpreg.h>
+
+#include <vm/vm.h>
+#include <vm/vm_object.h>
+#include <vm/pmap.h>
+
+struct agp_sis_softc {
+ struct agp_softc agp;
+ u_int32_t initial_aperture; /* aperture size at startup */
+ struct agp_gatt *gatt;
+};
+
+static const char*
+agp_sis_match(device_t dev)
+{
+ if (pci_get_class(dev) != PCIC_BRIDGE
+ || pci_get_subclass(dev) != PCIS_BRIDGE_HOST)
+ return NULL;
+
+ if (agp_find_caps(dev) == 0)
+ return NULL;
+
+ switch (pci_get_devid(dev)) {
+ case 0x00011039:
+ return ("SiS 5591 host to AGP bridge");
+ };
+
+ if (pci_get_vendor(dev) == 0x1039)
+ return ("SIS Generic host to PCI bridge");
+
+ return NULL;
+}
+
+static int
+agp_sis_probe(device_t dev)
+{
+ const char *desc;
+
+ desc = agp_sis_match(dev);
+ if (desc) {
+ device_verbose(dev);
+ device_set_desc(dev, desc);
+ return 0;
+ }
+
+ return ENXIO;
+}
+
+static int
+agp_sis_attach(device_t dev)
+{
+ struct agp_sis_softc *sc = device_get_softc(dev);
+ struct agp_gatt *gatt;
+ int error;
+
+ error = agp_generic_attach(dev);
+ if (error)
+ return error;
+
+ sc->initial_aperture = AGP_GET_APERTURE(dev);
+
+ for (;;) {
+ gatt = agp_alloc_gatt(dev);
+ if (gatt)
+ break;
+
+ /*
+ * Probably contigmalloc failure. Try reducing the
+ * aperture so that the gatt size reduces.
+ */
+ if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) {
+ agp_generic_detach(dev);
+ return ENOMEM;
+ }
+ }
+ sc->gatt = gatt;
+
+ /* Install the gatt. */
+ pci_write_config(dev, AGP_SIS_ATTBASE, gatt->ag_physical, 4);
+
+ /* Enable the aperture. */
+ pci_write_config(dev, AGP_SIS_WINCTRL,
+ pci_read_config(dev, AGP_SIS_WINCTRL, 1) | 3, 1);
+
+ /*
+ * Enable the TLB and make it automatically invalidate entries
+ * when the GATT is written.
+ */
+ pci_write_config(dev, AGP_SIS_TLBCTRL, 0x05, 1);
+
+ return 0;
+}
+
+static int
+agp_sis_detach(device_t dev)
+{
+ struct agp_sis_softc *sc = device_get_softc(dev);
+ int error;
+
+ error = agp_generic_detach(dev);
+ if (error)
+ return error;
+
+ /* Disable the aperture.. */
+ pci_write_config(dev, AGP_SIS_WINCTRL,
+ pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~3, 1);
+
+ /* and the TLB. */
+ pci_write_config(dev, AGP_SIS_TLBCTRL, 0, 1);
+
+ /* Put the aperture back the way it started. */
+ AGP_SET_APERTURE(dev, sc->initial_aperture);
+
+ agp_free_gatt(sc->gatt);
+ return 0;
+}
+
+static u_int32_t
+agp_sis_get_aperture(device_t dev)
+{
+ int gws;
+
+ /*
+ * The aperture size is equal to 4M<<gws.
+ */
+ gws = (pci_read_config(dev, AGP_SIS_WINCTRL, 1) & 0x70) >> 4;
+ return (4*1024*1024) << gws;
+}
+
+static int
+agp_sis_set_aperture(device_t dev, u_int32_t aperture)
+{
+ int gws;
+
+ /*
+ * Check for a power of two and make sure its within the
+ * programmable range.
+ */
+ if (aperture & (aperture - 1)
+ || aperture < 4*1024*1024
+ || aperture > 256*1024*1024)
+ return EINVAL;
+
+ gws = ffs(aperture / 4*1024*1024) - 1;
+
+ pci_write_config(dev, AGP_SIS_WINCTRL,
+ ((pci_read_config(dev, AGP_SIS_WINCTRL, 1) & ~0x70)
+ | gws << 4), 1);
+
+ return 0;
+}
+
+static int
+agp_sis_bind_page(device_t dev, int offset, vm_offset_t physical)
+{
+ struct agp_sis_softc *sc = device_get_softc(dev);
+
+ if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
+ return EINVAL;
+
+ sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical;
+ return 0;
+}
+
+static int
+agp_sis_unbind_page(device_t dev, int offset)
+{
+ struct agp_sis_softc *sc = device_get_softc(dev);
+
+ if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
+ return EINVAL;
+
+ sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
+ return 0;
+}
+
+static void
+agp_sis_flush_tlb(device_t dev)
+{
+ pci_write_config(dev, AGP_SIS_TLBFLUSH, 0x02, 1);
+}
+
+static device_method_t agp_sis_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, agp_sis_probe),
+ DEVMETHOD(device_attach, agp_sis_attach),
+ DEVMETHOD(device_detach, agp_sis_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+
+ /* AGP interface */
+ DEVMETHOD(agp_get_aperture, agp_sis_get_aperture),
+ DEVMETHOD(agp_set_aperture, agp_sis_set_aperture),
+ DEVMETHOD(agp_bind_page, agp_sis_bind_page),
+ DEVMETHOD(agp_unbind_page, agp_sis_unbind_page),
+ DEVMETHOD(agp_flush_tlb, agp_sis_flush_tlb),
+ DEVMETHOD(agp_enable, agp_generic_enable),
+ DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory),
+ DEVMETHOD(agp_free_memory, agp_generic_free_memory),
+ DEVMETHOD(agp_bind_memory, agp_generic_bind_memory),
+ DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory),
+
+ { 0, 0 }
+};
+
+static driver_t agp_sis_driver = {
+ "agp",
+ agp_sis_methods,
+ sizeof(struct agp_sis_softc),
+};
+
+static devclass_t agp_devclass;
+
+DRIVER_MODULE(agp_sis, pci, agp_sis_driver, agp_devclass, 0, 0);
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