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[src/trunk]: src/sys/dev/acpi Add ACPI attach glue for virtio_mmio.



details:   https://anonhg.NetBSD.org/src/rev/6173367fc2fc
branches:  trunk
changeset: 445294:6173367fc2fc
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Oct 21 12:26:38 2018 +0000

description:
Add ACPI attach glue for virtio_mmio.

diffstat:

 sys/dev/acpi/files.acpi    |    6 +-
 sys/dev/acpi/virtio_acpi.c |  185 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 190 insertions(+), 1 deletions(-)

diffs (207 lines):

diff -r 0e5a6851671c -r 6173367fc2fc sys/dev/acpi/files.acpi
--- a/sys/dev/acpi/files.acpi   Sun Oct 21 12:07:47 2018 +0000
+++ b/sys/dev/acpi/files.acpi   Sun Oct 21 12:26:38 2018 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.acpi,v 1.108 2018/10/19 21:09:10 jakllsch Exp $
+#      $NetBSD: files.acpi,v 1.109 2018/10/21 12:26:38 jmcneill Exp $
 
 include "dev/acpi/acpica/files.acpica"
 
@@ -245,4 +245,8 @@
 attach amdccp at acpinodebus with amdccp_acpi
 file   dev/acpi/amdccp_acpi.c          amdccp_acpi
 
+# QEMU Virtio
+attach virtio at acpinodebus with virtio_acpi
+file   dev/acpi/virtio_acpi.c          virtio_acpi
+
 include        "dev/acpi/wmi/files.wmi"
diff -r 0e5a6851671c -r 6173367fc2fc sys/dev/acpi/virtio_acpi.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/acpi/virtio_acpi.c        Sun Oct 21 12:26:38 2018 +0000
@@ -0,0 +1,185 @@
+/* $NetBSD: virtio_acpi.c,v 1.1 2018/10/21 12:26:38 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2018 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jared McNeill <jmcneill%invisible.ca@localhost>.
+ *
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: virtio_acpi.c,v 1.1 2018/10/21 12:26:38 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/cpu.h>
+#include <sys/device.h>
+
+#include <dev/acpi/acpireg.h>
+#include <dev/acpi/acpivar.h>
+
+#define        VIRTIO_PRIVATE
+#include <dev/virtio/virtio_mmiovar.h>
+
+struct virtio_acpi_softc {
+       struct virtio_mmio_softc        sc_msc;
+       int                             sc_irq;
+       int                             sc_irqtype;
+};
+
+static int     virtio_acpi_match(device_t, cfdata_t, void *);
+static void    virtio_acpi_attach(device_t, device_t, void *);
+static int     virtio_acpi_rescan(device_t, const char *, const int *);
+static int     virtio_acpi_detach(device_t, int);
+
+static int     virtio_acpi_setup_interrupts(struct virtio_mmio_softc *);
+static void    virtio_acpi_free_interrupts(struct virtio_mmio_softc *);
+
+CFATTACH_DECL3_NEW(virtio_acpi, sizeof(struct virtio_acpi_softc),
+    virtio_acpi_match, virtio_acpi_attach, virtio_acpi_detach, NULL,
+    virtio_acpi_rescan, (void *)voidop, DVF_DETACH_SHUTDOWN);
+
+static const char * const compatible[] = {
+       "LNRO0005",
+       NULL
+};
+
+static int
+virtio_acpi_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct acpi_attach_args *aa = aux;
+
+       if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
+               return 0;
+
+       return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
+}
+
+static void
+virtio_acpi_attach(device_t parent, device_t self, void *aux)
+{
+       struct virtio_acpi_softc * const sc = device_private(self);
+       struct virtio_mmio_softc * const msc = &sc->sc_msc;
+       struct virtio_softc * const vsc = &msc->sc_sc;
+       struct acpi_attach_args *aa = aux;
+       struct acpi_resources res;
+       struct acpi_mem *mem;
+       struct acpi_irq *irq;
+       ACPI_STATUS rv;
+       int error;
+
+       msc->sc_iot = aa->aa_memt;
+       vsc->sc_dev = self;
+       vsc->sc_dmat = aa->aa_dmat;
+
+       rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
+           &res, &acpi_resource_parse_ops_default);
+       if (ACPI_FAILURE(rv))
+               return;
+
+       mem = acpi_res_mem(&res, 0);
+       if (mem == NULL) {
+               aprint_error_dev(self, "couldn't find mem resource\n");
+               goto done;
+       }
+
+       irq = acpi_res_irq(&res, 0);
+       if (irq == NULL) {
+               aprint_error_dev(self, "couldn't find irq resource\n");
+               goto done;
+       }
+       sc->sc_irq = irq->ar_irq;
+       sc->sc_irqtype = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL;
+
+       error = bus_space_map(msc->sc_iot, mem->ar_base, mem->ar_length, 0, &msc->sc_ioh);
+       if (error) {
+               aprint_error_dev(self, "couldn't map registers\n");
+               return;
+       }
+       msc->sc_iosize = mem->ar_length;
+
+       msc->sc_setup_interrupts = virtio_acpi_setup_interrupts;
+       msc->sc_free_interrupts = virtio_acpi_free_interrupts;
+
+       virtio_mmio_common_attach(msc);
+       virtio_acpi_rescan(self, "virtio", NULL);
+
+done:
+       acpi_resource_cleanup(&res);
+}
+
+static int
+virtio_acpi_detach(device_t self, int flags)
+{
+       struct virtio_acpi_softc * const sc = device_private(self);
+       struct virtio_mmio_softc * const msc = &sc->sc_msc;
+
+       return virtio_mmio_common_detach(msc, flags);
+}
+
+static int
+virtio_acpi_rescan(device_t self, const char *ifattr, const int *locs)
+{
+       struct virtio_acpi_softc * const sc = device_private(self);
+       struct virtio_mmio_softc * const msc = &sc->sc_msc;
+       struct virtio_softc * const vsc = &msc->sc_sc;
+       struct virtio_attach_args va;
+
+       if (vsc->sc_child)
+               return 0;
+
+       memset(&va, 0, sizeof(va));
+       va.sc_childdevid = vsc->sc_childdevid;
+
+       config_found_ia(self, ifattr, &va, virtiobusprint);
+
+       return 0;
+}
+
+static int
+virtio_acpi_setup_interrupts(struct virtio_mmio_softc *msc)
+{
+       struct virtio_acpi_softc * const sc = (struct virtio_acpi_softc *)msc;
+       struct virtio_softc * const vsc = &msc->sc_sc;
+
+       msc->sc_ih = intr_establish(sc->sc_irq, IPL_VM, sc->sc_irqtype, virtio_mmio_intr, msc);
+       if (msc->sc_ih == NULL) {
+               aprint_error_dev(vsc->sc_dev, "couldn't install interrupt handler\n");
+               return -1;
+       }
+
+       aprint_normal_dev(vsc->sc_dev, "interrupting on irq %d\n", sc->sc_irq);
+
+       return 0;
+}
+
+static void
+virtio_acpi_free_interrupts(struct virtio_mmio_softc *msc)
+{
+       if (msc->sc_ih != NULL) {
+               intr_disestablish(msc->sc_ih);
+               msc->sc_ih = NULL;
+       }
+}



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