svn commit: r308724 - head/sys/dev/hyperv/vmbus
Dexuan Cui
dexuan at FreeBSD.org
Wed Nov 16 09:08:34 UTC 2016
Author: dexuan
Date: Wed Nov 16 09:08:32 2016
New Revision: 308724
URL: https://svnweb.freebsd.org/changeset/base/308724
Log:
hyperv/vmbus: add new vmbus methods to support PCIe pass-through
The new methods will be used by the coming pcib driver.
Reviewed by: sephe
Approved by: sephe (mentor)
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8409
Modified:
head/sys/dev/hyperv/vmbus/vmbus.c
head/sys/dev/hyperv/vmbus/vmbus_var.h
Modified: head/sys/dev/hyperv/vmbus/vmbus.c
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus.c Wed Nov 16 09:02:17 2016 (r308723)
+++ head/sys/dev/hyperv/vmbus/vmbus.c Wed Nov 16 09:08:32 2016 (r308724)
@@ -44,10 +44,13 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/taskqueue.h>
+#include <machine/bus.h>
#include <machine/intr_machdep.h>
+#include <machine/resource.h>
#include <x86/include/apicvar.h>
#include <contrib/dev/acpica/include/acpi.h>
+#include <dev/acpica/acpivar.h>
#include <dev/hyperv/include/hyperv.h>
#include <dev/hyperv/include/vmbus_xact.h>
@@ -58,6 +61,7 @@ __FBSDID("$FreeBSD$");
#include <dev/hyperv/vmbus/vmbus_chanvar.h>
#include "acpi_if.h"
+#include "pcib_if.h"
#include "vmbus_if.h"
#define VMBUS_GPADL_START 0xe1e10
@@ -74,6 +78,20 @@ static int vmbus_read_ivar(device_t, d
uintptr_t *);
static int vmbus_child_pnpinfo_str(device_t, device_t,
char *, size_t);
+static struct resource *vmbus_alloc_resource(device_t dev,
+ device_t child, int type, int *rid,
+ rman_res_t start, rman_res_t end,
+ rman_res_t count, u_int flags);
+static int vmbus_alloc_msi(device_t bus, device_t dev,
+ int count, int maxcount, int *irqs);
+static int vmbus_release_msi(device_t bus, device_t dev,
+ int count, int *irqs);
+static int vmbus_alloc_msix(device_t bus, device_t dev,
+ int *irq);
+static int vmbus_release_msix(device_t bus, device_t dev,
+ int irq);
+static int vmbus_map_msi(device_t bus, device_t dev,
+ int irq, uint64_t *addr, uint32_t *data);
static uint32_t vmbus_get_version_method(device_t, device_t);
static int vmbus_probe_guid_method(device_t, device_t,
const struct hyperv_guid *);
@@ -133,6 +151,22 @@ static device_method_t vmbus_methods[] =
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_read_ivar, vmbus_read_ivar),
DEVMETHOD(bus_child_pnpinfo_str, vmbus_child_pnpinfo_str),
+ DEVMETHOD(bus_alloc_resource, vmbus_alloc_resource),
+ DEVMETHOD(bus_release_resource, bus_generic_release_resource),
+ DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+ DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
+ DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
+#if __FreeBSD_version >= 1100000
+ DEVMETHOD(bus_get_cpus, bus_generic_get_cpus),
+#endif
+
+ /* pcib interface */
+ DEVMETHOD(pcib_alloc_msi, vmbus_alloc_msi),
+ DEVMETHOD(pcib_release_msi, vmbus_release_msi),
+ DEVMETHOD(pcib_alloc_msix, vmbus_alloc_msix),
+ DEVMETHOD(pcib_release_msix, vmbus_release_msix),
+ DEVMETHOD(pcib_map_msi, vmbus_map_msi),
/* Vmbus interface */
DEVMETHOD(vmbus_get_version, vmbus_get_version_method),
@@ -975,6 +1009,69 @@ vmbus_sysctl_version(SYSCTL_HANDLER_ARGS
return sysctl_handle_string(oidp, verstr, sizeof(verstr), req);
}
+/*
+ * We need the function to make sure the MMIO resource is allocated from the
+ * ranges found in _CRS.
+ *
+ * For the release function, we can use bus_generic_release_resource().
+ */
+static struct resource *
+vmbus_alloc_resource(device_t dev, device_t child, int type, int *rid,
+ rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
+{
+ struct vmbus_softc *sc = device_get_softc(dev);
+ device_t parent = device_get_parent(dev);
+ struct resource *res;
+
+ if (type != SYS_RES_MEMORY)
+ res = BUS_ALLOC_RESOURCE(parent, child, type, rid, start,
+ end, count, flags);
+ else
+ res = pcib_host_res_alloc(&sc->vmbus_mmio_res, child, type,
+ rid, start, end, count, flags);
+
+ return (res);
+}
+
+static device_t
+get_nexus(device_t vmbus)
+{
+ device_t acpi = device_get_parent(vmbus);
+ device_t nexus = device_get_parent(acpi);
+ return (nexus);
+}
+
+static int
+vmbus_alloc_msi(device_t bus, device_t dev, int count, int maxcount, int *irqs)
+{
+ return (PCIB_ALLOC_MSI(get_nexus(bus), dev, count, maxcount, irqs));
+}
+
+static int
+vmbus_release_msi(device_t bus, device_t dev, int count, int *irqs)
+{
+ return (PCIB_RELEASE_MSI(get_nexus(bus), dev, count, irqs));
+}
+
+static int
+vmbus_alloc_msix(device_t bus, device_t dev, int *irq)
+{
+ return (PCIB_ALLOC_MSIX(get_nexus(bus), dev, irq));
+}
+
+static int
+vmbus_release_msix(device_t bus, device_t dev, int irq)
+{
+ return (PCIB_RELEASE_MSIX(get_nexus(bus), dev, irq));
+}
+
+static int
+vmbus_map_msi(device_t bus, device_t dev, int irq, uint64_t *addr,
+ uint32_t *data)
+{
+ return (PCIB_MAP_MSI(get_nexus(bus), dev, irq, addr, data));
+}
+
static uint32_t
vmbus_get_version_method(device_t bus, device_t dev)
{
@@ -1002,6 +1099,138 @@ vmbus_get_vcpu_id_method(device_t bus, d
return (VMBUS_PCPU_GET(sc, vcpuid, cpu));
}
+#define VTPM_BASE_ADDR 0xfed40000
+#define FOUR_GB (1ULL << 32)
+
+enum parse_pass { parse_64, parse_32 };
+
+struct parse_context {
+ device_t vmbus_dev;
+ enum parse_pass pass;
+};
+
+static ACPI_STATUS
+parse_crs(ACPI_RESOURCE *res, void *ctx)
+{
+ const struct parse_context *pc = ctx;
+ device_t vmbus_dev = pc->vmbus_dev;
+
+ struct vmbus_softc *sc = device_get_softc(vmbus_dev);
+ UINT64 start, end;
+
+ switch (res->Type) {
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ start = res->Data.Address32.Address.Minimum;
+ end = res->Data.Address32.Address.Maximum;
+ break;
+
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ start = res->Data.Address64.Address.Minimum;
+ end = res->Data.Address64.Address.Maximum;
+ break;
+
+ default:
+ /* Unused types. */
+ return (AE_OK);
+ }
+
+ /*
+ * We don't use <1MB addresses.
+ */
+ if (end < 0x100000)
+ return (AE_OK);
+
+ /* Don't conflict with vTPM. */
+ if (end >= VTPM_BASE_ADDR && start < VTPM_BASE_ADDR)
+ end = VTPM_BASE_ADDR - 1;
+
+ if ((pc->pass == parse_32 && start < FOUR_GB) ||
+ (pc->pass == parse_64 && start >= FOUR_GB))
+ pcib_host_res_decodes(&sc->vmbus_mmio_res, SYS_RES_MEMORY,
+ start, end, 0);
+
+ return (AE_OK);
+}
+
+static void
+vmbus_get_crs(device_t dev, device_t vmbus_dev, enum parse_pass pass)
+{
+ struct parse_context pc;
+ ACPI_STATUS status;
+
+ if (bootverbose)
+ device_printf(dev, "walking _CRS, pass=%d\n", pass);
+
+ pc.vmbus_dev = vmbus_dev;
+ pc.pass = pass;
+ status = AcpiWalkResources(acpi_get_handle(dev), "_CRS",
+ parse_crs, &pc);
+
+ if (bootverbose && ACPI_FAILURE(status))
+ device_printf(dev, "_CRS: not found, pass=%d\n", pass);
+}
+
+static void
+vmbus_get_mmio_res_pass(device_t dev, enum parse_pass pass)
+{
+ device_t acpi0, pcib0 = NULL;
+ device_t *children;
+ int i, count;
+
+ /* Try to find _CRS on VMBus device */
+ vmbus_get_crs(dev, dev, pass);
+
+ /* Try to find _CRS on VMBus device's parent */
+ acpi0 = device_get_parent(dev);
+ vmbus_get_crs(acpi0, dev, pass);
+
+ /* Try to locate pcib0 and find _CRS on it */
+ if (device_get_children(acpi0, &children, &count) != 0)
+ return;
+
+ for (i = 0; i < count; i++) {
+ if (!device_is_attached(children[i]))
+ continue;
+
+ if (strcmp("pcib0", device_get_nameunit(children[i])))
+ continue;
+
+ pcib0 = children[i];
+ break;
+ }
+
+ if (pcib0)
+ vmbus_get_crs(pcib0, dev, pass);
+
+ free(children, M_TEMP);
+}
+
+static void
+vmbus_get_mmio_res(device_t dev)
+{
+ struct vmbus_softc *sc = device_get_softc(dev);
+ /*
+ * We walk the resources twice to make sure that: in the resource
+ * list, the 32-bit resources appear behind the 64-bit resources.
+ * NB: resource_list_add() uses INSERT_TAIL. This way, when we
+ * iterate through the list to find a range for a 64-bit BAR in
+ * vmbus_alloc_resource(), we can make sure we try to use >4GB
+ * ranges first.
+ */
+ pcib_host_res_init(dev, &sc->vmbus_mmio_res);
+
+ vmbus_get_mmio_res_pass(dev, parse_64);
+ vmbus_get_mmio_res_pass(dev, parse_32);
+}
+
+static void
+vmbus_free_mmio_res(device_t dev)
+{
+ struct vmbus_softc *sc = device_get_softc(dev);
+
+ pcib_host_res_free(dev, &sc->vmbus_mmio_res);
+}
+
static int
vmbus_probe(device_t dev)
{
@@ -1038,6 +1267,9 @@ vmbus_doattach(struct vmbus_softc *sc)
if (sc->vmbus_flags & VMBUS_FLAG_ATTACHED)
return (0);
+
+ vmbus_get_mmio_res(sc->vmbus_dev);
+
sc->vmbus_flags |= VMBUS_FLAG_ATTACHED;
sc->vmbus_gpadl = VMBUS_GPADL_START;
@@ -1184,6 +1416,8 @@ vmbus_detach(device_t dev)
mtx_destroy(&sc->vmbus_prichan_lock);
mtx_destroy(&sc->vmbus_chan_lock);
+ vmbus_free_mmio_res(dev);
+
return (0);
}
Modified: head/sys/dev/hyperv/vmbus/vmbus_var.h
==============================================================================
--- head/sys/dev/hyperv/vmbus/vmbus_var.h Wed Nov 16 09:02:17 2016 (r308723)
+++ head/sys/dev/hyperv/vmbus/vmbus_var.h Wed Nov 16 09:08:32 2016 (r308724)
@@ -31,8 +31,11 @@
#include <sys/param.h>
#include <sys/taskqueue.h>
+#include <sys/rman.h>
#include <dev/hyperv/include/hyperv_busdma.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcib_private.h>
/*
* NOTE: DO NOT CHANGE THIS.
@@ -77,6 +80,10 @@ struct vmbus_pcpu_data {
struct task message_task; /* message task */
} __aligned(CACHE_LINE_SIZE);
+#if __FreeBSD_version < 1100000
+typedef u_long rman_res_t;
+#endif
+
struct vmbus_softc {
void (*vmbus_event_proc)(struct vmbus_softc *, int);
u_long *vmbus_tx_evtflags;
@@ -120,6 +127,9 @@ struct vmbus_softc {
/* Complete channel list */
struct mtx vmbus_chan_lock;
TAILQ_HEAD(, vmbus_channel) vmbus_chans;
+
+ /* The list of usable MMIO ranges for PCIe pass-through */
+ struct pcib_host_resources vmbus_mmio_res;
};
#define VMBUS_FLAG_ATTACHED 0x0001 /* vmbus was attached */
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