e40d09375f
Implement the interace to create SR-IOV Virtual Functions (VFs). When a driver registers that they support SR-IOV by calling pci_setup_iov(), the SR-IOV code creates a new node in /dev/iov for that device. An ioctl can be invoked on that device to create VFs and have the driver initialize them. At this point, allocating memory I/O windows (BARs) is not supported. Differential Revision: https://reviews.freebsd.org/D76 Reviewed by: jhb MFC after: 1 month Sponsored by: Sandvine Inc.
376 lines
11 KiB
C
376 lines
11 KiB
C
/*-
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2000, BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <dev/acpica/acpivar.h>
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#include <sys/pciio.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pci_private.h>
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#include "pcib_if.h"
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#include "pci_if.h"
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/* Hooks for the ACPI CA debugging infrastructure. */
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#define _COMPONENT ACPI_BUS
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ACPI_MODULE_NAME("PCI")
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struct acpi_pci_devinfo {
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struct pci_devinfo ap_dinfo;
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ACPI_HANDLE ap_handle;
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int ap_flags;
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};
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ACPI_SERIAL_DECL(pci_powerstate, "ACPI PCI power methods");
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/* Be sure that ACPI and PCI power states are equivalent. */
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CTASSERT(ACPI_STATE_D0 == PCI_POWERSTATE_D0);
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CTASSERT(ACPI_STATE_D1 == PCI_POWERSTATE_D1);
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CTASSERT(ACPI_STATE_D2 == PCI_POWERSTATE_D2);
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CTASSERT(ACPI_STATE_D3 == PCI_POWERSTATE_D3);
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static int acpi_pci_attach(device_t dev);
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static int acpi_pci_child_location_str_method(device_t cbdev,
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device_t child, char *buf, size_t buflen);
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static int acpi_pci_probe(device_t dev);
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static int acpi_pci_read_ivar(device_t dev, device_t child, int which,
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uintptr_t *result);
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static int acpi_pci_write_ivar(device_t dev, device_t child, int which,
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uintptr_t value);
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static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
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void *context, void **status);
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static int acpi_pci_set_powerstate_method(device_t dev, device_t child,
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int state);
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static void acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child);
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static bus_dma_tag_t acpi_pci_get_dma_tag(device_t bus, device_t child);
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#ifdef PCI_IOV
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static device_t acpi_pci_create_iov_child(device_t bus, device_t pf,
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uint16_t rid, uint16_t vid, uint16_t did);
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#endif
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static device_method_t acpi_pci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, acpi_pci_probe),
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DEVMETHOD(device_attach, acpi_pci_attach),
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/* Bus interface */
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DEVMETHOD(bus_read_ivar, acpi_pci_read_ivar),
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DEVMETHOD(bus_write_ivar, acpi_pci_write_ivar),
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DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
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DEVMETHOD(bus_get_dma_tag, acpi_pci_get_dma_tag),
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DEVMETHOD(bus_get_domain, acpi_get_domain),
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/* PCI interface */
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DEVMETHOD(pci_set_powerstate, acpi_pci_set_powerstate_method),
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#ifdef PCI_IOV
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DEVMETHOD(pci_create_iov_child, acpi_pci_create_iov_child),
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#endif
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DEVMETHOD_END
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};
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static devclass_t pci_devclass;
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DEFINE_CLASS_1(pci, acpi_pci_driver, acpi_pci_methods, sizeof(struct pci_softc),
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pci_driver);
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DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
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MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
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MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
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MODULE_VERSION(acpi_pci, 1);
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static int
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acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct acpi_pci_devinfo *dinfo;
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dinfo = device_get_ivars(child);
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switch (which) {
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case ACPI_IVAR_HANDLE:
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*result = (uintptr_t)dinfo->ap_handle;
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return (0);
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case ACPI_IVAR_FLAGS:
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*result = (uintptr_t)dinfo->ap_flags;
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return (0);
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}
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return (pci_read_ivar(dev, child, which, result));
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}
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static int
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acpi_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
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{
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struct acpi_pci_devinfo *dinfo;
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dinfo = device_get_ivars(child);
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switch (which) {
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case ACPI_IVAR_HANDLE:
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dinfo->ap_handle = (ACPI_HANDLE)value;
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return (0);
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case ACPI_IVAR_FLAGS:
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dinfo->ap_flags = (int)value;
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return (0);
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}
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return (pci_write_ivar(dev, child, which, value));
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}
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static int
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acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
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size_t buflen)
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{
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struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
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int pxm;
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char buf2[32];
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pci_child_location_str_method(cbdev, child, buf, buflen);
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if (dinfo->ap_handle) {
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strlcat(buf, " handle=", buflen);
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strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
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if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ap_handle, "_PXM", &pxm))) {
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snprintf(buf2, 32, " _PXM=%d", pxm);
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strlcat(buf, buf2, buflen);
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}
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}
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return (0);
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}
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/*
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* PCI power manangement
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*/
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static int
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acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
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{
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ACPI_HANDLE h;
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ACPI_STATUS status;
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int old_state, error;
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error = 0;
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if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
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return (EINVAL);
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/*
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* We set the state using PCI Power Management outside of setting
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* the ACPI state. This means that when powering down a device, we
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* first shut it down using PCI, and then using ACPI, which lets ACPI
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* try to power down any Power Resources that are now no longer used.
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* When powering up a device, we let ACPI set the state first so that
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* it can enable any needed Power Resources before changing the PCI
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* power state.
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*/
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ACPI_SERIAL_BEGIN(pci_powerstate);
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old_state = pci_get_powerstate(child);
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if (old_state < state && pci_do_power_suspend) {
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error = pci_set_powerstate_method(dev, child, state);
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if (error)
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goto out;
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}
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h = acpi_get_handle(child);
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status = acpi_pwr_switch_consumer(h, state);
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if (ACPI_SUCCESS(status)) {
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if (bootverbose)
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device_printf(dev, "set ACPI power state D%d on %s\n",
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state, acpi_name(h));
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} else if (status != AE_NOT_FOUND)
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device_printf(dev,
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"failed to set ACPI power state D%d on %s: %s\n",
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state, acpi_name(h), AcpiFormatException(status));
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if (old_state > state && pci_do_power_resume)
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error = pci_set_powerstate_method(dev, child, state);
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out:
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ACPI_SERIAL_END(pci_powerstate);
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return (error);
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}
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static void
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acpi_pci_update_device(ACPI_HANDLE handle, device_t pci_child)
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{
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ACPI_STATUS status;
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device_t child;
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/*
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* Occasionally a PCI device may show up as an ACPI device
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* with a _HID. (For example, the TabletPC TC1000 has a
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* second PCI-ISA bridge that has a _HID for an
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* acpi_sysresource device.) In that case, leave ACPI-CA's
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* device data pointing at the ACPI-enumerated device.
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*/
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child = acpi_get_device(handle);
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if (child != NULL) {
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KASSERT(device_get_parent(child) ==
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devclass_get_device(devclass_find("acpi"), 0),
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("%s: child (%s)'s parent is not acpi0", __func__,
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acpi_name(handle)));
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return;
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}
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/*
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* Update ACPI-CA to use the PCI enumerated device_t for this handle.
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*/
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status = AcpiAttachData(handle, acpi_fake_objhandler, pci_child);
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if (ACPI_FAILURE(status))
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printf("WARNING: Unable to attach object data to %s - %s\n",
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acpi_name(handle), AcpiFormatException(status));
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}
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static ACPI_STATUS
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acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
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void **status)
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{
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struct acpi_pci_devinfo *dinfo;
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device_t *devlist;
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int devcount, i, func, slot;
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UINT32 address;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
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return_ACPI_STATUS (AE_OK);
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slot = ACPI_ADR_PCI_SLOT(address);
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func = ACPI_ADR_PCI_FUNC(address);
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if (device_get_children((device_t)context, &devlist, &devcount) != 0)
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return_ACPI_STATUS (AE_OK);
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for (i = 0; i < devcount; i++) {
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dinfo = device_get_ivars(devlist[i]);
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if (dinfo->ap_dinfo.cfg.func == func &&
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dinfo->ap_dinfo.cfg.slot == slot) {
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dinfo->ap_handle = handle;
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acpi_pci_update_device(handle, devlist[i]);
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break;
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}
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}
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free(devlist, M_TEMP);
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return_ACPI_STATUS (AE_OK);
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}
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static int
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acpi_pci_probe(device_t dev)
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{
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if (acpi_get_handle(dev) == NULL)
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return (ENXIO);
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device_set_desc(dev, "ACPI PCI bus");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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acpi_pci_attach(device_t dev)
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{
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int busno, domain, error;
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error = pci_attach_common(dev);
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if (error)
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return (error);
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/*
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* Since there can be multiple independantly numbered PCI
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* busses on systems with multiple PCI domains, we can't use
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* the unit number to decide which bus we are probing. We ask
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* the parent pcib what our domain and bus numbers are.
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*/
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domain = pcib_get_domain(dev);
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busno = pcib_get_bus(dev);
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/*
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* First, PCI devices are added as in the normal PCI bus driver.
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* Afterwards, the ACPI namespace under the bridge driver is
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* walked to save ACPI handles to all the devices that appear in
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* the ACPI namespace as immediate descendants of the bridge.
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*
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* XXX: Sometimes PCI devices show up in the ACPI namespace that
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* pci_add_children() doesn't find. We currently just ignore
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* these devices.
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*/
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pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
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AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
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acpi_pci_save_handle, NULL, dev, NULL);
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return (bus_generic_attach(dev));
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}
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#ifdef ACPI_DMAR
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bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
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static bus_dma_tag_t
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acpi_pci_get_dma_tag(device_t bus, device_t child)
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{
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bus_dma_tag_t tag;
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if (device_get_parent(child) == bus) {
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/* try dmar and return if it works */
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tag = dmar_get_dma_tag(bus, child);
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} else
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tag = NULL;
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if (tag == NULL)
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tag = pci_get_dma_tag(bus, child);
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return (tag);
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}
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#else
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static bus_dma_tag_t
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acpi_pci_get_dma_tag(device_t bus, device_t child)
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{
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return (pci_get_dma_tag(bus, child));
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}
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#endif
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#ifdef PCI_IOV
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static device_t
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acpi_pci_create_iov_child(device_t bus, device_t pf, uint16_t rid, uint16_t vid,
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uint16_t did)
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{
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struct acpi_pci_devinfo *dinfo;
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device_t vf;
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vf = pci_add_iov_child(bus, pf, sizeof(struct acpi_pci_devinfo), rid,
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vid, did);
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if (vf == NULL)
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return (NULL);
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dinfo = device_get_ivars(vf);
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dinfo->ap_handle = NULL;
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return (vf);
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}
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#endif
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