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patchset review: full VirtIO console implementation
Hi,
This series of patches implements the full VirtIO console feature set as
specified in the VirtIO 1.4 specification:
https://docs.oasis-open.org/virtio/virtio/v1.4/virtio-v1.4.html#x1-3980003
[1]: 01_mmio_cmdline_rework.patch
This patch is not directly related to viocon(4). It reworks the VirtIO
MMIO command-line handling to improve early console detection and to
make the overall pv(4) integration cleaner.
[2]: 02_viocon_console.patch
Initial viocon(4) console support, originally written by
Taylor R. Campbell.
[3]: 03_viocon_early_console.patch
Adds early console support to viocon(4), allowing console output before
the full device configuration phase.
[4]: 04_viocon_multiport.patch
Adds multiport support to viocon(4), adapted from initial work by
Jonathan A. Kollasch.
Review and comments appreciated.
---
[1]: https://imil.net/NetBSD/01_mmio_cmdline_rework.patch
5821d8849470675a8a546db6a16ce16ae3dbc60c MMIO cmdline rework
diff --git a/sys/arch/x86/pv/pvbus.c b/sys/arch/x86/pv/pvbus.c
index 85946ea104a8..62020e6bd1a2 100644
--- a/sys/arch/x86/pv/pvbus.c
+++ b/sys/arch/x86/pv/pvbus.c
@@ -44,7 +44,6 @@
static int _pv_dma_may_bounce(bus_dma_tag_t, bus_dmamap_t, int, int *);
static int pv_match(device_t, cfdata_t, void *);
static void pv_attach(device_t, device_t, void *);
-static int pv_submatch(device_t, cfdata_t, const int *, void *);
struct x86_bus_dma_tag pvbus_bus_dma_tag = {
._tag_needs_free = 0,
@@ -71,7 +70,6 @@ _pv_dma_may_bounce(bus_dma_tag_t t, bus_dmamap_t map, int flags,
static int
pv_match(device_t parent, cfdata_t match, void *aux)
{
-
return 1;
}
@@ -79,6 +77,7 @@ static void
pv_attach(device_t parent, device_t self, void *aux)
{
struct pv_attach_args pvaa;
+ struct mmio_cmdline_node *mmio_node;
pvaa.pvaa_memt = x86_bus_space_mem;
pvaa.pvaa_dmat = &pvbus_bus_dma_tag;
@@ -86,17 +85,16 @@ pv_attach(device_t parent, device_t self, void *aux)
aprint_naive("\n");
aprint_normal("\n");
- config_found(self, &pvaa, NULL, CFARGS(.search = pv_submatch));
-}
+ pvaa.mmio_node = NULL;
-static int
-pv_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
-{
- struct pv_attach_args *pvaa = aux;
+ /* Non MMIO devices */
+ while (config_found(self, &pvaa, NULL, CFARGS_NONE) != NULL)
+ continue;
+
+ virtio_mmio_cmdline_parse();
- if (config_probe(parent, cf, pvaa)) {
- config_attach(parent, cf, pvaa, NULL, CFARGS_NONE);
- return 0;
+ SLIST_FOREACH(mmio_node, &virtio_mmio_cmdline_devs, n_nodes) {
+ pvaa.mmio_node = mmio_node;
+ config_found(self, &pvaa, NULL, CFARGS_NONE);
}
- return 0;
}
diff --git a/sys/arch/x86/pv/pvvar.h b/sys/arch/x86/pv/pvvar.h
index 607f6f0a2ffa..414ce5b7c63f 100644
--- a/sys/arch/x86/pv/pvvar.h
+++ b/sys/arch/x86/pv/pvvar.h
@@ -32,6 +32,8 @@
#ifndef _PVBUS_PVVAR_H_
#define _PVBUS_PVVAR_H_
+#include <dev/virtio/virtio_mmiovar.h>
+
struct pv_softc {
device_t sc_dev;
};
@@ -41,8 +43,9 @@ struct pvbus_attach_args {
};
struct pv_attach_args {
- bus_space_tag_t pvaa_memt;
- bus_dma_tag_t pvaa_dmat;
+ bus_space_tag_t pvaa_memt;
+ bus_dma_tag_t pvaa_dmat;
+ struct mmio_cmdline_node *mmio_node;
};
#endif
diff --git a/sys/dev/virtio/arch/x86/virtio_mmio_cmdline.c b/sys/dev/virtio/arch/x86/virtio_mmio_cmdline.c
index 18a0ce9f8bc3..92aca13eced4 100644
--- a/sys/dev/virtio/arch/x86/virtio_mmio_cmdline.c
+++ b/sys/dev/virtio/arch/x86/virtio_mmio_cmdline.c
@@ -58,6 +58,7 @@
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/kernel.h>
+#include <sys/kmem.h>
#include <sys/module.h>
#include <sys/systm.h>
@@ -65,28 +66,24 @@
#include <dev/virtio/virtio_mmiovar.h>
#include <arch/x86/pv/pvvar.h>
#include <xen/hypervisor.h>
+#include <uvm/uvm_extern.h>
+#include <dev/cons.h>
#include <machine/i82093var.h>
#include "ioapic.h"
#define VMMIOSTR "virtio_mmio.device="
-struct mmio_args {
- uint64_t sz;
- uint64_t baseaddr;
- uint64_t irq;
- uint64_t id;
-};
-
struct virtio_mmio_cmdline_softc {
struct virtio_mmio_softc sc_msc;
struct mmio_args margs;
};
+struct mmio_cmdline_devs_head virtio_mmio_cmdline_devs =
+ SLIST_HEAD_INITIALIZER(virtio_mmio_cmdline_devs);
+
static int virtio_mmio_cmdline_match(device_t, cfdata_t, void *);
static void virtio_mmio_cmdline_attach(device_t, device_t, void *);
-static int virtio_mmio_cmdline_do_attach(device_t,
- struct pv_attach_args *, struct mmio_args *);
static int virtio_mmio_cmdline_detach(device_t, int);
static int virtio_mmio_cmdline_rescan(device_t, const char *, const int *);
static int virtio_mmio_cmdline_alloc_interrupts(struct virtio_mmio_softc *);
@@ -98,20 +95,14 @@ CFATTACH_DECL3_NEW(mmio_cmdline,
virtio_mmio_cmdline_detach, NULL,
virtio_mmio_cmdline_rescan, NULL, 0);
-static int
-virtio_mmio_cmdline_match(device_t parent, cfdata_t match, void *aux)
-{
- if (strstr(xen_start_info.cmd_line, VMMIOSTR) == NULL)
- return 0;
-
- return 1;
-}
-static void
+static int
parsearg(struct mmio_args *margs, const char *arg)
{
char *p;
+ /* Bus space type */
+ margs->bst = x86_bus_space_mem;
/* <size> */
margs->sz = strtoull(arg, (char **)&p, 0);
if ((margs->sz == 0) || (margs->sz == UINT64_MAX))
@@ -180,88 +171,96 @@ parsearg(struct mmio_args *margs, const char *arg)
if (*p)
goto bad;
- return;
+ return 0;
bad:
aprint_error("Error parsing virtio_mmio parameter: %s\n", arg);
+ return -1;
}
-static void
-virtio_mmio_cmdline_attach(device_t parent, device_t self, void *aux)
+void
+virtio_mmio_cmdline_parse(void)
{
- struct virtio_mmio_cmdline_softc *sc = device_private(self);
- struct pv_attach_args *pvaa = aux;
- struct mmio_args *margs = &sc->margs;
int keylen = strlen(VMMIOSTR);
- char *next;
- static char cmdline[LINE_MAX], *parg = NULL;
+ char tmpcmdline[sizeof(xen_start_info.cmd_line)];
+ struct mmio_args margs;
+ struct mmio_cmdline_node *mmio_node;
+ static bool mmio_cmdline_parsed = false;
- aprint_normal("\n");
- aprint_naive("\n");
+ if (mmio_cmdline_parsed)
+ return;
- if (parg == NULL) { /* first pass */
- strlcpy(cmdline, xen_start_info.cmd_line, sizeof(cmdline));
- aprint_verbose_dev(self, "kernel parameters: %s\n",
- cmdline);
- parg = strstr(cmdline, VMMIOSTR);
- }
+ mmio_cmdline_parsed = true;
- if (parg != NULL) {
- parg += keylen;
- if (!*parg)
- return;
-
- next = parg;
- while (*next && *next != ' ') /* find end of argument */
- next++;
- if (*next) { /* space */
- *next++ = '\0'; /* end the argument string */
- next = strstr(next, VMMIOSTR);
- }
+ strlcpy(tmpcmdline, xen_start_info.cmd_line, sizeof(tmpcmdline));
- aprint_normal_dev(self, "viommio: %s\n", parg);
- parsearg(margs, parg);
+ for (char *p = strstr(tmpcmdline, VMMIOSTR);
+ (p = strstr(p, VMMIOSTR)) != NULL && strlen(p) > keylen;) {
+ char *end = strchr(p, ' ');
+ p += keylen;
- if (virtio_mmio_cmdline_do_attach(self, pvaa, margs))
- return;
+ if (end)
+ while (*end == ' ')
+ *end++ = 0;
- if (next) {
- parg = next;
- config_found(parent, pvaa, NULL, CFARGS_NONE);
+ if (parsearg(&margs, p) == 0) {
+ mmio_node = kmem_zalloc(sizeof(*mmio_node), KM_SLEEP);
+ mmio_node->margs = margs;
+
+ SLIST_INSERT_HEAD(&virtio_mmio_cmdline_devs,
+ mmio_node, n_nodes);
}
+
+ if (end)
+ p = end;
}
}
static int
-virtio_mmio_cmdline_do_attach(device_t self,
- struct pv_attach_args *pvaa,
- struct mmio_args *margs)
+virtio_mmio_cmdline_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct pv_attach_args *pvaa = aux;
+
+ if (pvaa->mmio_node != NULL)
+ return 1;
+
+ return 0;
+}
+
+static void
+virtio_mmio_cmdline_attach(device_t parent, device_t self, void *aux)
{
+ struct pv_attach_args *pvaa = aux;
+ struct mmio_cmdline_node *mmio_node = pvaa->mmio_node;
struct virtio_mmio_cmdline_softc *sc = device_private(self);
struct virtio_mmio_softc *const msc = &sc->sc_msc;
struct virtio_softc *const vsc = &msc->sc_sc;
int error;
+ aprint_normal("\n");
+ aprint_naive("\n");
+
+ aprint_normal_dev(self, "viommio: @%#" PRIxPADDR "\n",
+ mmio_node->margs.baseaddr);
+
msc->sc_iot = pvaa->pvaa_memt;
vsc->sc_dmat = pvaa->pvaa_dmat;
- msc->sc_iosize = margs->sz;
+ msc->sc_iosize = mmio_node->margs.sz;
vsc->sc_dev = self;
+ sc->margs = mmio_node->margs;
- error = bus_space_map(msc->sc_iot, margs->baseaddr, margs->sz, 0,
- &msc->sc_ioh);
+ error = bus_space_map(msc->sc_iot, mmio_node->margs.baseaddr,
+ mmio_node->margs.sz, 0, &msc->sc_ioh);
if (error) {
- aprint_error_dev(self, "couldn't map %#" PRIx64 ": %d",
- margs->baseaddr, error);
- return error;
+ aprint_error_dev(self, "couldn't map %#" PRIxPADDR ": %d",
+ mmio_node->margs.baseaddr, error);
+ return;
}
-
msc->sc_alloc_interrupts = virtio_mmio_cmdline_alloc_interrupts;
msc->sc_free_interrupts = virtio_mmio_cmdline_free_interrupts;
virtio_mmio_common_attach(msc);
virtio_mmio_cmdline_rescan(self, "virtio", NULL);
-
- return 0;
}
static int
diff --git a/sys/dev/virtio/virtio_mmio.c b/sys/dev/virtio/virtio_mmio.c
index ba9307b198e0..97c17a5a3814 100644
--- a/sys/dev/virtio/virtio_mmio.c
+++ b/sys/dev/virtio/virtio_mmio.c
@@ -66,39 +66,9 @@ __KERNEL_RCSID(0, "$NetBSD: virtio_mmio.c,v 1.15 2025/07/26 14:18:14 martin Exp
#include <sys/device.h>
#include <sys/mutex.h>
-#define VIRTIO_PRIVATE
+#include <dev/virtio/virtio_mmioreg.h>
#include <dev/virtio/virtio_mmiovar.h>
-#define VIRTIO_MMIO_MAGIC ('v' | 'i' << 8 | 'r' << 16 | 't' << 24)
-
-#define VIRTIO_MMIO_MAGIC_VALUE 0x000
-#define VIRTIO_MMIO_VERSION 0x004
-#define VIRTIO_MMIO_DEVICE_ID 0x008
-#define VIRTIO_MMIO_VENDOR_ID 0x00c
-#define VIRTIO_MMIO_DEVICE_FEATURES 0x010 /* "HostFeatures" in v1 */
-#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014 /* "HostFeaturesSel" in v1 */
-#define VIRTIO_MMIO_DRIVER_FEATURES 0x020 /* "GuestFeatures" in v1 */
-#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024 /* "GuestFeaturesSel" in v1 */
-#define VIRTIO_MMIO_V1_GUEST_PAGE_SIZE 0x028
-#define VIRTIO_MMIO_QUEUE_SEL 0x030
-#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
-#define VIRTIO_MMIO_QUEUE_NUM 0x038
-#define VIRTIO_MMIO_V1_QUEUE_ALIGN 0x03c
-#define VIRTIO_MMIO_V1_QUEUE_PFN 0x040
-#define VIRTIO_MMIO_QUEUE_READY 0x044
-#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
-#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
-#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
-#define VIRTIO_MMIO_STATUS 0x070
-#define VIRTIO_MMIO_V2_QUEUE_DESC_LOW 0x080
-#define VIRTIO_MMIO_V2_QUEUE_DESC_HIGH 0x084
-#define VIRTIO_MMIO_V2_QUEUE_AVAIL_LOW 0x090
-#define VIRTIO_MMIO_V2_QUEUE_AVAIL_HIGH 0x094
-#define VIRTIO_MMIO_V2_QUEUE_USED_LOW 0x0a0
-#define VIRTIO_MMIO_V2_QUEUE_USED_HIGH 0x0a4
-#define VIRTIO_MMIO_V2_CONFIG_GEN 0x0fc
-#define VIRTIO_MMIO_CONFIG 0x100
-
/*
* MMIO configuration space for virtio-mmio v1 is in guest byte order.
*
@@ -116,7 +86,6 @@ __KERNEL_RCSID(0, "$NetBSD: virtio_mmio.c,v 1.15 2025/07/26 14:18:14 martin Exp
# define STRUCT_ENDIAN LITTLE_ENDIAN
#endif
-
static void virtio_mmio_kick(struct virtio_softc *, uint16_t);
static uint16_t virtio_mmio_read_queue_size(struct virtio_softc *, uint16_t);
static void virtio_mmio_v1_setup_queue(struct virtio_softc *, uint16_t, uint64_t);
@@ -128,7 +97,7 @@ static int virtio_mmio_alloc_interrupts(struct virtio_softc *);
static void virtio_mmio_free_interrupts(struct virtio_softc *);
static int virtio_mmio_setup_interrupts(struct virtio_softc *, int);
-static uint32_t
+uint32_t
virtio_mmio_reg_read(struct virtio_mmio_softc *sc, bus_addr_t reg)
{
uint32_t val;
diff --git a/sys/dev/virtio/virtio_mmioreg.h b/sys/dev/virtio/virtio_mmioreg.h
new file mode 100644
index 000000000000..b0ccfa71e330
--- /dev/null
+++ b/sys/dev/virtio/virtio_mmioreg.h
@@ -0,0 +1,64 @@
+/* $NetBSD$ */
+/*
+ * Copyright (c) 2018 Jonathan A. Kollasch
+ * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+ */
+
+#ifndef _VIRTIO_MMIOREG_H_
+#define _VIRTIO_MMIOREG_H_
+
+#define VIRTIO_MMIO_MAGIC ('v' | 'i' << 8 | 'r' << 16 | 't' << 24)
+
+#define VIRTIO_MMIO_MAGIC_VALUE 0x000
+#define VIRTIO_MMIO_VERSION 0x004
+#define VIRTIO_MMIO_DEVICE_ID 0x008
+#define VIRTIO_MMIO_VENDOR_ID 0x00c
+#define VIRTIO_MMIO_DEVICE_FEATURES 0x010 /* "HostFeatures" in v1 */
+#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014 /* "HostFeaturesSel" in v1 */
+#define VIRTIO_MMIO_DRIVER_FEATURES 0x020 /* "GuestFeatures" in v1 */
+#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024 /* "GuestFeaturesSel" in v1 */
+#define VIRTIO_MMIO_V1_GUEST_PAGE_SIZE 0x028
+#define VIRTIO_MMIO_QUEUE_SEL 0x030
+#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
+#define VIRTIO_MMIO_QUEUE_NUM 0x038
+#define VIRTIO_MMIO_V1_QUEUE_ALIGN 0x03c
+#define VIRTIO_MMIO_V1_QUEUE_PFN 0x040
+#define VIRTIO_MMIO_QUEUE_READY 0x044
+#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
+#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
+#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
+#define VIRTIO_MMIO_STATUS 0x070
+#define VIRTIO_MMIO_V2_QUEUE_DESC_LOW 0x080
+#define VIRTIO_MMIO_V2_QUEUE_DESC_HIGH 0x084
+#define VIRTIO_MMIO_V2_QUEUE_AVAIL_LOW 0x090
+#define VIRTIO_MMIO_V2_QUEUE_AVAIL_HIGH 0x094
+#define VIRTIO_MMIO_V2_QUEUE_USED_LOW 0x0a0
+#define VIRTIO_MMIO_V2_QUEUE_USED_HIGH 0x0a4
+#define VIRTIO_MMIO_V2_CONFIG_GEN 0x0fc
+#define VIRTIO_MMIO_CONFIG 0x100
+
+/* VirtIO Console MMIO register offsets */
+#define VIRTIO_CONSOLE_EMERG_WR_OFFSET 8 /* from VIRTIO_MMIO_CONFIG */
+
+#endif /* _VIRTIO_MMIOREG_H_ */
diff --git a/sys/dev/virtio/virtio_mmiovar.h b/sys/dev/virtio/virtio_mmiovar.h
index c95ec285287b..14465a1e2161 100644
--- a/sys/dev/virtio/virtio_mmiovar.h
+++ b/sys/dev/virtio/virtio_mmiovar.h
@@ -28,6 +28,8 @@
#ifndef _VIRTIO_MMIOVAR_H_
#define _VIRTIO_MMIOVAR_H_
+#define VIRTIO_PRIVATE
+
#include <dev/pci/virtiovar.h> /* XXX: move to non-pci */
struct virtio_mmio_softc {
@@ -46,9 +48,28 @@ struct virtio_mmio_softc {
};
+struct mmio_args {
+ bus_space_tag_t bst;
+ uint64_t sz;
+ paddr_t baseaddr;
+ uint64_t irq;
+ uint64_t id;
+};
+
+struct mmio_cmdline_node {
+ struct mmio_args margs;
+
+ SLIST_ENTRY(mmio_cmdline_node) n_nodes;
+};
+
+SLIST_HEAD(mmio_cmdline_devs_head, mmio_cmdline_node);
+extern struct mmio_cmdline_devs_head virtio_mmio_cmdline_devs;
+
+uint32_t virtio_mmio_reg_read(struct virtio_mmio_softc *, bus_addr_t);
bool virtio_mmio_common_probe_present(struct virtio_mmio_softc *);
void virtio_mmio_common_attach(struct virtio_mmio_softc *);
int virtio_mmio_common_detach(struct virtio_mmio_softc *, int);
int virtio_mmio_intr(void *);
+void virtio_mmio_cmdline_parse(void);
#endif /* _VIRTIO_MMIOVAR_H_ */
[2]: https://imil.net/NetBSD/02_viocon_console.patch
90756aaf222dee37ee4988dca5bae412746c8122 viocon(4) console support by Riastradh
diff --git a/share/man/man4/viocon.4 b/share/man/man4/viocon.4
index 26f2bd6c26de..4cdc1872d2c6 100644
--- a/share/man/man4/viocon.4
+++ b/share/man/man4/viocon.4
@@ -58,9 +58,7 @@ by
.An Stefan Fritsch Aq Mt sf%sfritsch.de@localhost .
It was ported to
.Nx 10.0 .
-.Sh BUGS
-Use as a kernel console for
-.Nx
-is not yet supported.
.Pp
-The multiport feature is not yet supported.
+Kernel support was implemented by
+.An Taylor R. Campbell Aq Mt riastradh%NetBSD.org@localhost .
+.Pp
diff --git a/sys/dev/virtio/viocon.c b/sys/dev/virtio/viocon.c
index 73c938936be1..e19ed91a892c 100644
--- a/sys/dev/virtio/viocon.c
+++ b/sys/dev/virtio/viocon.c
@@ -17,6 +17,8 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#define VIOCON_CONSOLE
+
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $");
@@ -33,6 +35,10 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
#include <sys/systm.h>
#include <sys/tty.h>
+#ifdef VIOCON_CONSOLE
+#include <dev/cons.h>
+#endif
+
#include <dev/pci/virtioreg.h>
#include <dev/pci/virtiovar.h>
@@ -117,6 +123,13 @@ struct viocon_port {
uint16_t vp_cols;
u_char *vp_rx_buf;
u_char *vp_tx_buf;
+
+#ifdef VIOCON_CONSOLE
+ struct consdev vp_cntab;
+ unsigned int vp_pollpos;
+ unsigned int vp_polllen;
+ bool vp_polling;
+#endif
};
struct viocon_softc {
@@ -153,6 +166,12 @@ void vioconstop(struct tty *, int);
int vioconioctl(dev_t, u_long, void *, int, struct lwp *);
struct tty *viocontty(dev_t dev);
+#ifdef VIOCON_CONSOLE
+static void viocon_cnpollc(dev_t, int);
+static int viocon_cngetc(dev_t);
+static void viocon_cnputc(dev_t, int);
+#endif
+
CFATTACH_DECL_NEW(viocon, sizeof(struct viocon_softc),
viocon_match, viocon_attach, /*detach*/NULL, /*activate*/NULL);
@@ -229,6 +248,20 @@ viocon_attach(struct device *parent, struct device *self, void *aux)
viocon_rx_fill(sc->sc_ports[0]);
+#ifdef VIOCON_CONSOLE
+ if (cn_tab == NULL || cn_tab->cn_dev == NODEV) {
+ sc->sc_ports[0]->vp_cntab = (struct consdev) {
+ .cn_pollc = viocon_cnpollc,
+ .cn_getc = viocon_cngetc,
+ .cn_putc = viocon_cnputc,
+ .cn_dev = VIOCONDEV(device_unit(self), 0),
+ .cn_pri = CN_REMOTE,
+ };
+ aprint_normal_dev(sc->sc_dev, "console\n");
+ cn_tab = &sc->sc_ports[0]->vp_cntab;
+ }
+#endif
+
return;
err:
kmem_free(sc->sc_vqs, nvqs * sizeof(sc->sc_vqs[0]));
@@ -634,3 +667,77 @@ vioconioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
return error2;
return ENOTTY;
}
+
+#ifdef VIOCON_CONSOLE
+
+static void
+viocon_cnpollc(dev_t dev, int on)
+{
+ struct viocon_port *vp = dev2port(dev);
+ int s;
+
+ KASSERT((bool)on != vp->vp_polling);
+
+ s = spltty();
+ vp->vp_polling = on;
+ vioconhwiflow(vp->vp_tty, on);
+ splx(s);
+}
+
+static int
+viocon_cngetc(dev_t dev)
+{
+ struct viocon_softc *sc = dev2sc(dev);
+ struct viocon_port *vp = dev2port(dev);
+ struct virtqueue *vq = vp->vp_rx;
+ struct virtio_softc *vsc = sc->sc_virtio;
+ int slot, len;
+
+ KASSERT(vp->vp_polling);
+ while (vp->vp_polllen == 0) {
+ if (virtio_dequeue(vsc, vq, &slot, &len) == 0) {
+ KASSERTMSG(slot >= 0, "slot=%d", slot);
+ KASSERTMSG(slot < vq->vq_num, "slot=%d", slot);
+ KASSERTMSG(len > 0, "len=%d", len);
+ KASSERTMSG(len <= BUFSIZE, "len=%d", len);
+ bus_dmamap_sync(virtio_dmat(vsc), vp->vp_dmamap,
+ slot * BUFSIZE, BUFSIZE, BUS_DMASYNC_POSTREAD);
+ vp->vp_polllen = len;
+ vp->vp_pollpos = slot * BUFSIZE;
+ }
+ }
+ KASSERT(vp->vp_pollpos <= vq->vq_num * BUFSIZE);
+ vp->vp_polllen--;
+ return vp->vp_rx_buf[vp->vp_pollpos++];
+}
+
+static void
+viocon_cnputc(dev_t dev, int c)
+{
+ struct viocon_softc *sc = dev2sc(dev);
+ struct viocon_port *vp = dev2port(dev);
+ struct virtqueue *vq = vp->vp_tx;
+ struct virtio_softc *vsc = sc->sc_virtio;
+ int slot;
+ int s, error;
+
+ s = spltty();
+ KERNEL_LOCK(1, NULL);
+ (void)viocon_tx_drain(vp, vq);
+ error = virtio_enqueue_prep(vsc, vq, &slot);
+ if (error == 0) {
+ error = virtio_enqueue_reserve(vsc, vq, slot, 1);
+ KASSERTMSG(error == 0, "error=%d", error);
+ vp->vp_tx_buf[slot * BUFSIZE] = c;
+ bus_dmamap_sync(virtio_dmat(vsc), vp->vp_dmamap,
+ vp->vp_tx_buf - vp->vp_rx_buf + slot * BUFSIZE, 1,
+ BUS_DMASYNC_PREWRITE);
+ virtio_enqueue_p(vsc, vq, slot, vp->vp_dmamap,
+ vp->vp_tx_buf - vp->vp_rx_buf + slot * BUFSIZE, 1, 1);
+ virtio_enqueue_commit(vsc, vq, slot, 1);
+ }
+ KERNEL_UNLOCK_ONE(NULL);
+ splx(s);
+}
+
+#endif
[3]: https://imil.net/NetBSD/03_viocon_early_console.patch
59991624d5d9ac95c555b895b5fc6a51fc9a1d91 viocon(4) early console support
diff --git a/share/man/man4/viocon.4 b/share/man/man4/viocon.4
index 4cdc1872d2c6..1498fdba58bb 100644
--- a/share/man/man4/viocon.4
+++ b/share/man/man4/viocon.4
@@ -62,3 +62,5 @@ It was ported to
Kernel support was implemented by
.An Taylor R. Campbell Aq Mt riastradh%NetBSD.org@localhost .
.Pp
+Early console support was implemented by
+.An Emile So iMil Sc Heitor Aq Mt imil%NetBSD.org@localhost .
diff --git a/sys/arch/x86/x86/consinit.c b/sys/arch/x86/x86/consinit.c
index b300fb4aa4e8..f24f80d5c846 100644
--- a/sys/arch/x86/x86/consinit.c
+++ b/sys/arch/x86/x86/consinit.c
@@ -109,6 +109,17 @@ __KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.44 2025/11/29 01:33:40 manu Exp $");
#include <xen/xen.h>
#endif
+#include "viocon.h"
+#include "virtio_mmio.h"
+#if (NVIOCON > 0) && (NVIRTIO_MMIO > 0)
+#include <dev/virtio/virtio_vioconvar.h>
+#include <dev/virtio/virtio_mmioreg.h>
+#include <dev/virtio/virtio_mmiovar.h>
+#include <uvm/uvm_extern.h> /* for kernel_map */
+#endif
+
+#include "pv.h"
+
#ifndef CONSDEVNAME
#define CONSDEVNAME "pc"
#endif
@@ -159,6 +170,40 @@ int comkgdbmode = KGDB_DEVMODE;
#endif /* KGDB */
+/* XXX only on VirtIO MMIO on pvbus for now, MMIO on ACPI could be added */
+#if (NVIOCON > 0) && (NVIRTIO_MMIO > 0)
+static int
+viocon_early_probe(void)
+{
+ struct mmio_cmdline_node *mmio_node;
+
+ virtio_mmio_cmdline_parse();
+
+ SLIST_FOREACH(mmio_node, &virtio_mmio_cmdline_devs, n_nodes) {
+ bus_space_handle_t bsh;
+
+ if (_x86_memio_map(mmio_node->margs.bst,
+ mmio_node->margs.baseaddr, mmio_node->margs.sz, 0, &bsh) != 0) {
+ aprint_error("%s: failed to map MMIO region at "
+ "%#" PRIxPADDR "\n", __func__,\
+ mmio_node->margs.baseaddr);
+ continue;
+ }
+
+ aprint_verbose("mmio addr:%#" PRIxPADDR "\n",
+ mmio_node->margs.baseaddr);
+
+ if (viocon_earlyinit(mmio_node->margs.bst, bsh) == 0)
+ return 0;
+
+ _x86_memio_unmap(mmio_node->margs.bst, bsh, mmio_node->margs.sz, NULL);
+ }
+
+ aprint_error("%s: no virtio console found\n", __func__);
+ return -1;
+}
+#endif
+
/*
* consinit:
* initialize the system console.
@@ -268,6 +313,19 @@ dokbd:
error);
return;
}
+#if (NVIOCON > 0) && (NVIRTIO_MMIO > 0)
+ if (!strcmp(console_devname, "viocon")) {
+ /* We need uvm to be ready before we can map the MMIO region */
+ if (!kernel_map) {
+ initted = 0;
+ return;
+ }
+#if NPV > 0
+ if (viocon_early_probe() == 0)
+ return;
+#endif
+ }
+#endif
#if (NCOM > 0)
if (!strcmp(console_devname, "com")) {
int addr = consinfo->addr;
diff --git a/sys/dev/virtio/files.virtio b/sys/dev/virtio/files.virtio
index 4e399624ab0b..8d3d8def6ea3 100644
--- a/sys/dev/virtio/files.virtio
+++ b/sys/dev/virtio/files.virtio
@@ -3,8 +3,8 @@
# XXX the contents of the following included file should be moved here
include "dev/pci/files.virtio"
-file dev/virtio/virtio_mmio.c virtio_mmio
+file dev/virtio/virtio_mmio.c virtio_mmio needs-flag
device viocon
attach viocon at virtio
-file dev/virtio/viocon.c viocon
+file dev/virtio/viocon.c viocon needs-flag
diff --git a/sys/dev/virtio/viocon.c b/sys/dev/virtio/viocon.c
index e19ed91a892c..e452dd9780e3 100644
--- a/sys/dev/virtio/viocon.c
+++ b/sys/dev/virtio/viocon.c
@@ -17,8 +17,6 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#define VIOCON_CONSOLE
-
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $");
@@ -35,10 +33,11 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
#include <sys/systm.h>
#include <sys/tty.h>
-#ifdef VIOCON_CONSOLE
#include <dev/cons.h>
-#endif
+#include <dev/virtio/virtio_vioconvar.h>
+#include <dev/virtio/virtio_mmioreg.h>
+#define VIRTIO_PRIVATE
#include <dev/pci/virtioreg.h>
#include <dev/pci/virtiovar.h>
@@ -124,12 +123,10 @@ struct viocon_port {
u_char *vp_rx_buf;
u_char *vp_tx_buf;
-#ifdef VIOCON_CONSOLE
struct consdev vp_cntab;
unsigned int vp_pollpos;
unsigned int vp_polllen;
bool vp_polling;
-#endif
};
struct viocon_softc {
@@ -166,11 +163,10 @@ void vioconstop(struct tty *, int);
int vioconioctl(dev_t, u_long, void *, int, struct lwp *);
struct tty *viocontty(dev_t dev);
-#ifdef VIOCON_CONSOLE
static void viocon_cnpollc(dev_t, int);
static int viocon_cngetc(dev_t);
static void viocon_cnputc(dev_t, int);
-#endif
+static void viocon_early_putc(dev_t, int);
CFATTACH_DECL_NEW(viocon, sizeof(struct viocon_softc),
viocon_match, viocon_attach, /*detach*/NULL, /*activate*/NULL);
@@ -202,7 +198,65 @@ dev2port(dev_t dev)
return dev2sc(dev)->sc_ports[VIOCONPORT(dev)];
}
-int viocon_match(struct device *parent, struct cfdata *match, void *aux)
+static struct {
+ bus_space_tag_t ec_bst;
+ bus_space_handle_t ec_bsh;
+ bus_addr_t ec_reg_offset;
+} early_console;
+
+static void
+viocon_early_putc(dev_t dev, int c)
+{
+ bus_space_write_4(early_console.ec_bst, early_console.ec_bsh,
+ early_console.ec_reg_offset, c);
+}
+
+int
+viocon_earlyinit(bus_space_tag_t bst, bus_space_handle_t bsh)
+{
+ static struct consdev viocon_early_consdev = {
+ .cn_putc = viocon_early_putc,
+ .cn_getc = NULL,
+ .cn_pollc = NULL,
+ .cn_dev = NODEV,
+ .cn_pri = CN_NORMAL
+ };
+
+ if (bus_space_read_4(bst, bsh, VIRTIO_MMIO_MAGIC_VALUE) !=
+ VIRTIO_MMIO_MAGIC) {
+ return -1;
+ }
+
+ if (bus_space_read_4(bst, bsh, VIRTIO_MMIO_DEVICE_ID) !=
+ VIRTIO_DEVICE_ID_CONSOLE) {
+ return -1;
+ }
+
+ if (!(bus_space_read_4(bst, bsh, VIRTIO_MMIO_DEVICE_FEATURES) &
+ VIRTIO_CONSOLE_F_EMERG_WRITE)) {
+ return -1;
+ }
+
+ /*
+ * https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.html#x1-3250004
+ * emerg_wr is 32 bits long
+ */
+ if (bus_space_subregion(bst, bsh,
+ VIRTIO_MMIO_CONFIG + VIRTIO_CONSOLE_EMERG_WR_OFFSET,
+ sizeof(uint32_t), &early_console.ec_bsh) != 0) {
+ return -1;
+ }
+
+ early_console.ec_bst = bst;
+ early_console.ec_reg_offset = 0; /* already adjusted by subregion */
+
+ cn_tab = &viocon_early_consdev;
+
+ return 0;
+}
+
+int
+viocon_match(struct device *parent, struct cfdata *match, void *aux)
{
struct virtio_attach_args *va = aux;
if (va->sc_childdevid == VIRTIO_DEVICE_ID_CONSOLE)
@@ -248,7 +302,6 @@ viocon_attach(struct device *parent, struct device *self, void *aux)
viocon_rx_fill(sc->sc_ports[0]);
-#ifdef VIOCON_CONSOLE
if (cn_tab == NULL || cn_tab->cn_dev == NODEV) {
sc->sc_ports[0]->vp_cntab = (struct consdev) {
.cn_pollc = viocon_cnpollc,
@@ -260,7 +313,6 @@ viocon_attach(struct device *parent, struct device *self, void *aux)
aprint_normal_dev(sc->sc_dev, "console\n");
cn_tab = &sc->sc_ports[0]->vp_cntab;
}
-#endif
return;
err:
@@ -668,8 +720,6 @@ vioconioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
return ENOTTY;
}
-#ifdef VIOCON_CONSOLE
-
static void
viocon_cnpollc(dev_t dev, int on)
{
@@ -739,5 +789,3 @@ viocon_cnputc(dev_t dev, int c)
KERNEL_UNLOCK_ONE(NULL);
splx(s);
}
-
-#endif
diff --git a/sys/dev/virtio/virtio_vioconvar.h b/sys/dev/virtio/virtio_vioconvar.h
new file mode 100644
index 000000000000..6d75186ff0b1
--- /dev/null
+++ b/sys/dev/virtio/virtio_vioconvar.h
@@ -0,0 +1,9 @@
+
+#ifndef _VIRTIO_VIOCONVAR_H_
+#define _VIRTIO_VIOCONVAR_H_
+
+#include <sys/bus.h>
+
+int viocon_earlyinit(bus_space_tag_t, bus_space_handle_t);
+
+#endif /* _VIRTIO_VIOCONVAR_H_ */
[4]: https://imil.net/NetBSD/04_viocon_multiport.patch
d3660f82a40da23fbcd88acb878adaf25ce5a06f viocon(4) multiport support
diff --git a/share/man/man4/viocon.4 b/share/man/man4/viocon.4
index 1498fdba58bb..12dee3068596 100644
--- a/share/man/man4/viocon.4
+++ b/share/man/man4/viocon.4
@@ -64,3 +64,6 @@ Kernel support was implemented by
.Pp
Early console support was implemented by
.An Emile So iMil Sc Heitor Aq Mt imil%NetBSD.org@localhost .
+.Pp
+Multiport support was implemented by
+.An Jonathan A. Kollasch Aq Mt jakllsch%NetBSD.org@localhost .
diff --git a/sys/dev/virtio/viocon.c b/sys/dev/virtio/viocon.c
index e452dd9780e3..df85031aeed3 100644
--- a/sys/dev/virtio/viocon.c
+++ b/sys/dev/virtio/viocon.c
@@ -32,6 +32,8 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
#include <sys/lwp.h>
#include <sys/systm.h>
#include <sys/tty.h>
+#include <sys/fcntl.h>
+#include <sys/poll.h>
#include <dev/cons.h>
#include <dev/virtio/virtio_vioconvar.h>
@@ -41,6 +43,8 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
#include <dev/pci/virtioreg.h>
#include <dev/pci/virtiovar.h>
+#include <prop/proplib.h>
+
#include "ioconf.h"
/* OpenBSD compat shims */
@@ -54,6 +58,8 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
#define VIRTIO_CONSOLE_F_MULTIPORT (1ULL<<1)
#define VIRTIO_CONSOLE_F_EMERG_WRITE (1ULL<<2)
+#define VIRTIO_CONSOLE_BAD_ID (~(uint32_t)0)
+
/* config space */
#define VIRTIO_CONSOLE_COLS 0 /* 16 bits */
#define VIRTIO_CONSOLE_ROWS 2 /* 16 bits */
@@ -74,12 +80,15 @@ __KERNEL_RCSID(0, "$NetBSD: viocon.c,v 1.10 2024/08/05 19:13:34 riastradh Exp $"
"b\x01" "MULTIPORT\0" \
"b\x02" "EMERG_WRITE\0"
+/* The control virtqueues are after the first port */
+#define VIOCON_CTRL_RX_IDX 2
+#define VIOCON_CTRL_TX_IDX 3
struct virtio_console_control {
uint32_t id; /* Port number */
#define VIRTIO_CONSOLE_DEVICE_READY 0
-#define VIRTIO_CONSOLE_PORT_ADD 1
-#define VIRTIO_CONSOLE_PORT_REMOVE 2
+#define VIRTIO_CONSOLE_DEVICE_ADD 1
+#define VIRTIO_CONSOLE_DEVICE_REMOVE 2
#define VIRTIO_CONSOLE_PORT_READY 3
#define VIRTIO_CONSOLE_CONSOLE_PORT 4
#define VIRTIO_CONSOLE_RESIZE 5
@@ -88,7 +97,7 @@ struct virtio_console_control {
uint16_t event;
uint16_t value;
-};
+} __packed;
struct virtio_console_control_resize {
/* yes, the order is different than in config space */
@@ -98,10 +107,10 @@ struct virtio_console_control_resize {
#define BUFSIZE 128
-#define VIOCONDEV(u,p) makedev(cdevsw_lookup_major(&viocon_cdevsw), \
- ((u) << 4) | (p))
-#define VIOCONUNIT(x) (minor(x) >> 4)
-#define VIOCONPORT(x) (minor(x) & 0x0f)
+#define VIOCONDEV(u,p) makedev(cdevsw_lookup_major(&viocon_cdevsw), \
+ ((u & 0xff) << 4) | (p & 0xf))
+#define VIOCONUNIT(x) (TTUNIT(x) >> 4)
+#define VIOCONPORT(x) (TTUNIT(x) & 0x0f)
struct viocon_port {
struct viocon_softc *vp_sc;
@@ -109,14 +118,14 @@ struct viocon_port {
struct virtqueue *vp_tx;
void *vp_si;
struct tty *vp_tty;
- const char *vp_name;
+ char *vp_name;
bus_dma_segment_t vp_dmaseg;
bus_dmamap_t vp_dmamap;
-#ifdef NOTYET
- unsigned int vp_host_open:1; /* XXX needs F_MULTIPORT */
- unsigned int vp_guest_open:1; /* XXX needs F_MULTIPORT */
- unsigned int vp_is_console:1; /* XXX needs F_MULTIPORT */
-#endif
+
+ unsigned int vp_host_open:1;
+ unsigned int vp_guest_open:1;
+ unsigned int vp_is_console:1;
+
unsigned int vp_iflow:1; /* rx flow control */
uint16_t vp_rows;
uint16_t vp_cols;
@@ -142,10 +151,26 @@ struct viocon_softc {
unsigned int sc_max_ports;
struct viocon_port **sc_ports;
+
+ bool has_multiport;
+
+ bus_dma_segment_t sc_dmaseg;
+ bus_dmamap_t sc_dmamap;
+ struct {
+ struct virtio_console_control ctrl;
+ uint8_t buf[BUFSIZE-8];
+ } *sc_ctrl_rx;
+ bus_dmamap_t sc_dmamap_tx;
+ union {
+ struct virtio_console_control sc_tx;
+ uint8_t sc_tx_buf[16];
+ };
};
int viocon_match(struct device *, struct cfdata *, void *);
void viocon_attach(struct device *, struct device *, void *);
+int viocon_control_rx_intr(struct virtqueue *);
+int viocon_control_tx_intr(struct virtqueue *);
int viocon_tx_intr(struct virtqueue *);
int viocon_tx_drain(struct viocon_port *, struct virtqueue *vq);
int viocon_rx_intr(struct virtqueue *);
@@ -161,8 +186,16 @@ int vioconread(dev_t, struct uio *, int);
int vioconwrite(dev_t, struct uio *, int);
void vioconstop(struct tty *, int);
int vioconioctl(dev_t, u_long, void *, int, struct lwp *);
-struct tty *viocontty(dev_t dev);
-
+static int viocon_ports_vq_alloc(struct viocon_softc *, int);
+struct tty *viocontty(dev_t dev);
+static dev_type_poll(vioconpoll);
+static void viocon_port_destroy(struct viocon_softc *, int);
+static void viocon_control_rx_fill(struct viocon_softc *);
+static void viocon_control_dmamap(struct viocon_softc *);
+static int viocon_control_send(struct viocon_softc *, uint32_t, uint16_t,
+ uint16_t );
+
+static void viocon_console(struct viocon_softc *, int);
static void viocon_cnpollc(dev_t, int);
static int viocon_cngetc(dev_t);
static void viocon_cnputc(dev_t, int);
@@ -179,7 +212,7 @@ const struct cdevsw viocon_cdevsw = {
.d_ioctl = vioconioctl,
.d_stop = vioconstop,
.d_tty = viocontty,
- .d_poll = nopoll, /* XXX */
+ .d_poll = vioconpoll,
.d_mmap = nommap,
.d_kqfilter = ttykqfilter,
.d_discard = nodiscard,
@@ -198,6 +231,12 @@ dev2port(dev_t dev)
return dev2sc(dev)->sc_ports[VIOCONPORT(dev)];
}
+static inline int
+viocon_vqidx2portidx(int vq)
+{
+ return (vq >= 4) ? (vq - VIOCON_PORT_NQS) / VIOCON_PORT_NQS : 0;
+}
+
static struct {
bus_space_tag_t ec_bst;
bus_space_handle_t ec_bsh;
@@ -269,6 +308,8 @@ viocon_attach(struct device *parent, struct device *self, void *aux)
{
struct viocon_softc *sc = device_private(self);
struct virtio_softc *vsc = device_private(parent);
+ prop_dictionary_t dict = device_properties(self);
+ prop_array_t namearray;
int maxports = 1;
size_t nvqs;
@@ -278,40 +319,61 @@ viocon_attach(struct device *parent, struct device *self, void *aux)
device_xname(parent));
return;
}
+
+ virtio_child_attach_start(vsc, self, IPL_TTY,
+ /*req_features*/VIRTIO_CONSOLE_F_SIZE | VIRTIO_CONSOLE_F_MULTIPORT
+ | VIRTIO_CONSOLE_F_EMERG_WRITE | VIRTIO_F_RING_EVENT_IDX,
+ VIRTIO_CONSOLE_FLAG_BITS);
+
+ if (vsc->sc_active_features & VIRTIO_CONSOLE_F_MULTIPORT) {
+ maxports = virtio_read_device_config_4(vsc,
+ VIRTIO_CONSOLE_MAX_NR_PORTS);
+ aprint_verbose_dev(self,
+ "has multiport feature, max_ports: %u\n", maxports);
+ sc->has_multiport = true;
+ } else
+ sc->has_multiport = false;
+
sc->sc_virtio = vsc;
sc->sc_max_ports = maxports;
nvqs = VIOCON_PORT_NQS * maxports;
+ if (sc->has_multiport)
+ nvqs += 2; /* rx and tx control */
+
+ prop_dictionary_set_uint32(dict, "max_ports", sc->sc_max_ports);
+ namearray = prop_array_create_with_capacity(sc->sc_max_ports);
+ prop_dictionary_set(dict, "port_names", namearray);
sc->sc_vqs = kmem_zalloc(nvqs * sizeof(sc->sc_vqs[0]),
KM_SLEEP);
sc->sc_ports = kmem_zalloc(maxports * sizeof(sc->sc_ports[0]),
KM_SLEEP);
- virtio_child_attach_start(vsc, self, IPL_TTY,
- /*req_features*/VIRTIO_CONSOLE_F_SIZE, VIRTIO_CONSOLE_FLAG_BITS);
-
- DPRINTF("%s: softc: %p\n", __func__, sc);
- if (viocon_port_create(sc, 0) != 0) {
- printf("\n%s: viocon_port_create failed\n", __func__);
+ if (viocon_ports_vq_alloc(sc, maxports) != 0)
goto err;
+
+ if (!sc->has_multiport) {
+ DPRINTF("%s: softc: %p\n", __func__, sc);
+ /* virtqueue index handled in port creation */
+ if (viocon_port_create(sc, 0) != 0) {
+ printf("\n%s: viocon_port_create failed\n", __func__);
+ goto err;
+ }
+ viocon_console(sc, 0);
}
if (virtio_child_attach_finish(vsc, sc->sc_vqs, nvqs,
/*config_change*/NULL, /*req_flags*/0) != 0)
goto err;
- viocon_rx_fill(sc->sc_ports[0]);
-
- if (cn_tab == NULL || cn_tab->cn_dev == NODEV) {
- sc->sc_ports[0]->vp_cntab = (struct consdev) {
- .cn_pollc = viocon_cnpollc,
- .cn_getc = viocon_cngetc,
- .cn_putc = viocon_cnputc,
- .cn_dev = VIOCONDEV(device_unit(self), 0),
- .cn_pri = CN_REMOTE,
- };
- aprint_normal_dev(sc->sc_dev, "console\n");
- cn_tab = &sc->sc_ports[0]->vp_cntab;
+ if (sc->has_multiport) {
+ viocon_control_rx_fill(sc);
+
+ viocon_control_send(sc, VIRTIO_CONSOLE_BAD_ID,
+ VIRTIO_CONSOLE_DEVICE_READY, 1);
+
+ virtio_start_vq_intr(vsc, sc->sc_c_vq_rx);
+ virtio_start_vq_intr(vsc, sc->sc_c_vq_tx);
}
return;
@@ -321,48 +383,271 @@ err:
virtio_child_attach_failed(vsc);
}
-int
-viocon_port_create(struct viocon_softc *sc, int portidx)
+static void
+viocon_control_dmamap(struct viocon_softc *sc)
+{
+ struct virtio_softc *vsc = sc->sc_virtio;
+ int nsegs;
+ void *kva;
+
+ if (bus_dmamap_create(virtio_dmat(vsc), BUFSIZE, 1, BUFSIZE, 0,
+ BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &sc->sc_dmamap) != 0) {
+ goto err;
+ }
+
+ if (bus_dmamap_create(virtio_dmat(vsc), 16, 1, 16, 0,
+ BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW, &sc->sc_dmamap_tx) != 0) {
+ goto err;
+ }
+
+ if (bus_dmamem_alloc(virtio_dmat(vsc), BUFSIZE,
+ sizeof(struct virtio_console_control), 0, &sc->sc_dmaseg,
+ 1, &nsegs, BUS_DMA_NOWAIT) != 0)
+ goto err;
+
+ if (bus_dmamem_map(virtio_dmat(vsc), &sc->sc_dmaseg, nsegs,
+ BUFSIZE, &kva, BUS_DMA_NOWAIT) != 0)
+ goto err;
+
+ memset(kva, 0, BUFSIZE);
+ sc->sc_ctrl_rx = kva;
+
+ if (bus_dmamap_load(virtio_dmat(vsc), sc->sc_dmamap, sc->sc_ctrl_rx,
+ BUFSIZE, NULL, BUS_DMA_NOWAIT|BUS_DMA_READ) != 0)
+ goto err;
+
+ return;
+err:
+ panic("%s failed", __func__);
+}
+
+static int
+viocon_ports_vq_alloc(struct viocon_softc *sc, int maxports)
{
struct virtio_softc *vsc = sc->sc_virtio;
- int rxidx, txidx, allocsize, nsegs;
+ int rxidx, txidx, i;
char name[6];
struct viocon_port *vp;
- void *kva;
- struct tty *tp;
- vp = kmem_zalloc(sizeof(*vp), KM_SLEEP);
- if (vp == NULL)
- return ENOMEM;
- sc->sc_ports[portidx] = vp;
- vp->vp_sc = sc;
- DPRINTF("%s: vp: %p\n", __func__, vp);
-
- rxidx = (portidx * VIOCON_PORT_NQS) + VIOCON_PORT_RX;
- txidx = (portidx * VIOCON_PORT_NQS) + VIOCON_PORT_TX;
-
- snprintf(name, sizeof(name), "p%drx", portidx);
- virtio_init_vq_vqdone(vsc, &sc->sc_vqs[rxidx], rxidx,
- viocon_rx_intr);
- if (virtio_alloc_vq(vsc, &sc->sc_vqs[rxidx], BUFSIZE, 1,
- name) != 0) {
- printf("\nCan't alloc %s virtqueue\n", name);
+ for (i = 0; i < maxports; i++) {
+ /* The control virtqueues are after the first port. */
+ if (sc->has_multiport && i == 1) {
+ /* allocate control virtqueues */
+ sc->sc_c_vq_rx = &sc->sc_vqs[VIOCON_CTRL_RX_IDX];
+ sc->sc_c_vq_tx = &sc->sc_vqs[VIOCON_CTRL_TX_IDX];
+
+ virtio_init_vq_vqdone(vsc, sc->sc_c_vq_rx, VIOCON_CTRL_RX_IDX,
+ viocon_control_rx_intr);
+ virtio_init_vq_vqdone(vsc, sc->sc_c_vq_tx, VIOCON_CTRL_TX_IDX,
+ viocon_control_tx_intr);
+
+ if (virtio_alloc_vq(vsc, &sc->sc_vqs[VIOCON_CTRL_RX_IDX],
+ BUFSIZE, 1, "control_rx"))
+ goto err;
+ if (virtio_alloc_vq(vsc, &sc->sc_vqs[VIOCON_CTRL_TX_IDX],
+ 16, 1, "control_tx"))
+ goto err;
+
+ viocon_control_dmamap(sc);
+ }
+
+ vp = kmem_zalloc(sizeof(*vp), KM_SLEEP);
+
+ sc->sc_ports[i] = vp;
+ vp->vp_sc = sc;
+ DPRINTF("%s: vp: %p\n", __func__, vp);
+
+ rxidx = (i * VIOCON_PORT_NQS) + VIOCON_PORT_RX;
+ txidx = (i * VIOCON_PORT_NQS) + VIOCON_PORT_TX;
+
+ if (i > 0) {
+ rxidx += VIOCON_CTRL_RX_IDX;
+ txidx += VIOCON_CTRL_RX_IDX;
+ }
+
+ snprintf(name, sizeof(name), "p%drx", i);
+ virtio_init_vq_vqdone(vsc, &sc->sc_vqs[rxidx], rxidx,
+ viocon_rx_intr);
+ if (virtio_alloc_vq(vsc, &sc->sc_vqs[rxidx], BUFSIZE, 1,
+ name) != 0) {
+ printf("\nCan't alloc %s virtqueue\n", name);
+ goto err;
+ }
+ vp->vp_rx = &sc->sc_vqs[rxidx];
+ vp->vp_si = softint_establish(SOFTINT_SERIAL, viocon_rx_soft, vp);
+ DPRINTF("%s: rx: %p\n", __func__, vp->vp_rx);
+
+ snprintf(name, sizeof(name), "p%dtx", i);
+ virtio_init_vq_vqdone(vsc, &sc->sc_vqs[txidx], txidx,
+ viocon_tx_intr);
+ if (virtio_alloc_vq(vsc, &sc->sc_vqs[txidx], BUFSIZE, 1,
+ name) != 0) {
+ printf("\nCan't alloc %s virtqueue\n", name);
+ goto err;
+ }
+ vp->vp_tx = &sc->sc_vqs[txidx];
+ DPRINTF("%s: tx: %p\n", __func__, vp->vp_tx);
+ }
+
+ return 0;
+err:
+ panic("%s failed", __func__);
+ return -1;
+}
+
+static void
+viocon_control_rx_fill(struct viocon_softc *sc)
+{
+ struct virtio_softc *vsc = sc->sc_virtio;
+ struct virtqueue *vq = sc->sc_c_vq_rx;
+ int r, slot, ndone = 0;
+
+ while ((r = virtio_enqueue_prep(vsc, vq, &slot)) == 0) {
+ if (virtio_enqueue_reserve(vsc, vq, slot, 1) != 0)
+ break;
+ bus_dmamap_sync(virtio_dmat(vsc), sc->sc_dmamap, slot * BUFSIZE,
+ BUFSIZE, BUS_DMASYNC_PREREAD);
+ virtio_enqueue_p(vsc, vq, slot, sc->sc_dmamap, slot * BUFSIZE,
+ BUFSIZE, 0);
+ virtio_enqueue_commit(vsc, vq, slot, 0);
+ ndone++;
+ }
+ KASSERT(r == 0 || r == EAGAIN);
+ if (ndone > 0)
+ virtio_notify(vsc, vq);
+}
+
+int
+viocon_control_tx_intr(struct virtqueue *vq)
+{
+ struct virtio_softc *vsc = vq->vq_owner;
+ struct viocon_softc *sc = device_private(virtio_child(vsc));
+ int ndone = 0, slot, len;
+
+ while (virtio_dequeue(vsc, vq, &slot, &len) == 0) {
+ bus_dmamap_sync(virtio_dmat(vsc), sc->sc_dmamap_tx,
+ 0, 8, BUS_DMASYNC_POSTWRITE);
+ virtio_dequeue_commit(vsc, vq, slot);
+ ndone++;
+ }
+ return ndone;
+}
+
+int
+viocon_control_rx_intr(struct virtqueue *vq)
+{
+ struct virtio_softc *vsc = vq->vq_owner;
+ struct viocon_softc *sc = device_private(virtio_child(vsc));
+ struct viocon_port *vp;
+ prop_dictionary_t properties = device_properties(sc->sc_dev);
+ prop_array_t namearray;
+ int ndone = 0, slot, len, namelen;
+ uint32_t id;
+ uint16_t event, value __unused;
+
+ while (virtio_dequeue(vsc, vq, &slot, &len) == 0) {
+ bus_dmamap_sync(virtio_dmat(vsc), sc->sc_dmamap,
+ slot * BUFSIZE, BUFSIZE, BUS_DMASYNC_POSTREAD);
+ id = virtio_rw32(vsc, sc->sc_ctrl_rx[slot].ctrl.id);
+ event = virtio_rw16(vsc, sc->sc_ctrl_rx[slot].ctrl.event);
+ value = virtio_rw16(vsc, sc->sc_ctrl_rx[slot].ctrl.value);
+
+ if (id != VIRTIO_CONSOLE_BAD_ID && id >= sc->sc_max_ports) {
+ DPRINTF("%s: invalid port id %d\n", __func__, id);
+ return 0;
+ }
+
+ switch (event) {
+ /* https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.html#x1-3290006 */
+ case VIRTIO_CONSOLE_DEVICE_ADD:
+ aprint_verbose_dev(sc->sc_dev, "adding port %u\n", id);
+ if (viocon_port_create(sc, id) == 0)
+ viocon_control_send(sc, id,
+ VIRTIO_CONSOLE_PORT_READY, 1);
+ break;
+ case VIRTIO_CONSOLE_CONSOLE_PORT:
+ aprint_verbose_dev(sc->sc_dev, "%u is a console port\n", id);
+ sc->sc_ports[id]->vp_is_console = 1;
+ viocon_console(sc, id);
+ break;
+ case VIRTIO_CONSOLE_PORT_OPEN:
+ aprint_verbose_dev(sc->sc_dev, "host opened port %u\n", id);
+ sc->sc_ports[id]->vp_host_open = 1;
+ break;
+ case VIRTIO_CONSOLE_PORT_NAME:
+ namelen = len - sizeof(sc->sc_ctrl_rx[slot].ctrl);
+ if (namelen > 0) {
+ vp = sc->sc_ports[id];
+ if (vp->vp_name != NULL)
+ kmem_free(vp->vp_name, strlen(vp->vp_name) + 1);
+ vp->vp_name = kmem_zalloc(namelen + 1, KM_SLEEP);
+ memcpy(vp->vp_name, sc->sc_ctrl_rx[slot].buf, namelen);
+ vp->vp_name[namelen] = '\0';
+ aprint_normal_dev(sc->sc_dev, "port %u name: %s\n",
+ id, vp->vp_name);
+ namearray = prop_dictionary_get(properties, "port_names");
+ prop_array_set_string_nocopy(namearray, id, vp->vp_name);
+ }
+ break;
+ case VIRTIO_CONSOLE_DEVICE_REMOVE:
+ if (sc->sc_ports[id] != NULL)
+ viocon_port_destroy(sc, id);
+ break;
+ default:
+ aprint_verbose("unsupported event: %u\n", event);
+ }
+
+ virtio_dequeue_commit(vsc, vq, slot);
+ ndone++;
+ }
+
+ viocon_control_rx_fill(sc);
+
+ return ndone;
+}
+
+static int
+viocon_control_send(struct viocon_softc *sc, uint32_t id, uint16_t event,
+ uint16_t value)
+{
+ struct virtio_softc *vsc = sc->sc_virtio;
+ int slot;
+
+ sc->sc_tx.id = virtio_rw32(vsc, id);
+ sc->sc_tx.event = virtio_rw16(vsc, event);
+ sc->sc_tx.value = virtio_rw16(vsc, value);
+
+ if (bus_dmamap_load(virtio_dmat(vsc), sc->sc_dmamap_tx, sc->sc_tx_buf,
+ 8, NULL, BUS_DMA_NOWAIT|BUS_DMA_WRITE) != 0)
+ goto err;
+ bus_dmamap_sync(virtio_dmat(vsc), sc->sc_dmamap_tx,
+ 0, 8, BUS_DMASYNC_PREWRITE);
+
+ if (virtio_enqueue_prep(vsc, sc->sc_c_vq_tx, &slot)) {
goto err;
}
- vp->vp_rx = &sc->sc_vqs[rxidx];
- vp->vp_si = softint_establish(SOFTINT_SERIAL, viocon_rx_soft, vp);
- DPRINTF("%s: rx: %p\n", __func__, vp->vp_rx);
-
- snprintf(name, sizeof(name), "p%dtx", portidx);
- virtio_init_vq_vqdone(vsc, &sc->sc_vqs[txidx], txidx,
- viocon_tx_intr);
- if (virtio_alloc_vq(vsc, &sc->sc_vqs[txidx], BUFSIZE, 1,
- name) != 0) {
- printf("\nCan't alloc %s virtqueue\n", name);
+ if (virtio_enqueue_reserve(vsc, sc->sc_c_vq_tx, slot, 1)) {
goto err;
}
- vp->vp_tx = &sc->sc_vqs[txidx];
- DPRINTF("%s: tx: %p\n", __func__, vp->vp_tx);
+
+ virtio_enqueue(vsc, sc->sc_c_vq_tx, slot, sc->sc_dmamap_tx, true);
+ virtio_enqueue_commit(vsc, sc->sc_c_vq_tx, slot, 1);
+
+ return 0;
+err:
+ return -1;
+}
+
+int
+viocon_port_create(struct viocon_softc *sc, int portidx)
+{
+ struct virtio_softc *vsc = sc->sc_virtio;
+ struct viocon_port *vp = sc->sc_ports[portidx];
+ struct tty *tp;
+ prop_dictionary_t properties = device_properties(sc->sc_dev);
+ prop_array_t namearray;
+ int allocsize, nsegs;
+ void *kva;
allocsize = (vp->vp_rx->vq_num + vp->vp_tx->vq_num) * BUFSIZE;
@@ -399,16 +684,60 @@ viocon_port_create(struct viocon_softc *sc, int portidx)
tp->t_dev = VIOCONDEV(device_unit(sc->sc_dev), portidx);
vp->vp_tty = tp;
DPRINTF("%s: tty: %p\n", __func__, tp);
+ vp->vp_name = kmem_zalloc(7, KM_SLEEP);
+ snprintf(vp->vp_name, 7, "port%02d", portidx);
+
+ tty_attach(tp);
virtio_start_vq_intr(vsc, vp->vp_rx);
virtio_start_vq_intr(vsc, vp->vp_tx);
+ viocon_rx_fill(sc->sc_ports[portidx]);
+
+ namearray = prop_dictionary_get(properties, "port_names");
+ prop_array_set_string_nocopy(namearray, portidx, vp->vp_name);
+
return 0;
err:
panic("%s failed", __func__);
return -1;
}
+static void
+viocon_port_destroy(struct viocon_softc *sc, int portidx)
+{
+ struct viocon_port *vp = sc->sc_ports[portidx];
+
+ if (vp == NULL)
+ return;
+
+ viocon_control_send(sc, portidx, VIRTIO_CONSOLE_PORT_READY, 0);
+
+ if (vp->vp_name != NULL)
+ kmem_free(vp->vp_name, strlen(vp->vp_name) + 1);
+ tty_free(vp->vp_tty);
+ vp = NULL;
+}
+
+static void
+viocon_console(struct viocon_softc *sc, int portidx)
+{
+ struct viocon_port *vp = sc->sc_ports[portidx];
+
+ if (cn_tab != NULL && cn_tab->cn_dev != NODEV)
+ return;
+
+ sc->sc_ports[portidx]->vp_cntab = (struct consdev) {
+ .cn_pollc = viocon_cnpollc,
+ .cn_getc = viocon_cngetc,
+ .cn_putc = viocon_cnputc,
+ .cn_dev = vp->vp_tty->t_dev,
+ .cn_pri = CN_REMOTE,
+ };
+ aprint_normal_dev(sc->sc_dev, "console\n");
+ cn_tab = &sc->sc_ports[portidx]->vp_cntab;
+}
+
int
viocon_tx_drain(struct viocon_port *vp, struct virtqueue *vq)
{
@@ -431,17 +760,19 @@ viocon_tx_intr(struct virtqueue *vq)
{
struct virtio_softc *vsc = vq->vq_owner;
struct viocon_softc *sc = device_private(virtio_child(vsc));
- int ndone = 0;
- int portidx = (vq->vq_index - 1) / 2;
+ int portidx = viocon_vqidx2portidx(vq->vq_index);
struct viocon_port *vp = sc->sc_ports[portidx];
struct tty *tp = vp->vp_tty;
+ int ndone = 0;
splassert(IPL_TTY);
ndone = viocon_tx_drain(vp, vq);
+ ttylock(tp);
if (ndone && ISSET(tp->t_state, TS_BUSY)) {
CLR(tp->t_state, TS_BUSY);
(*tp->t_linesw->l_start)(tp);
}
+ ttyunlock(tp);
return 1;
}
@@ -473,7 +804,7 @@ viocon_rx_intr(struct virtqueue *vq)
{
struct virtio_softc *vsc = vq->vq_owner;
struct viocon_softc *sc = device_private(virtio_child(vsc));
- int portidx = (vq->vq_index - 1) / 2;
+ int portidx = viocon_vqidx2portidx(vq->vq_index);
struct viocon_port *vp = sc->sc_ports[portidx];
softint_schedule(vp->vp_si);
@@ -499,6 +830,9 @@ viocon_rx_soft(void *arg)
virtio_dequeue_commit(vsc, vq, slot);
}
+ if (virtio_features(vsc) & VIRTIO_F_RING_EVENT_IDX)
+ virtio_start_vq_intr(vsc, vp->vp_rx);
+
viocon_rx_fill(vp);
return;
@@ -529,10 +863,16 @@ vioconstart(struct tty *tp)
if (ISSET(tp->t_state, TS_TIMEOUT | TS_TTSTOP))
goto out;
+ if (!ttypull(tp))
+ goto out;
+
if (tp->t_outq.c_cc == 0)
goto out;
ndone = 0;
+ if (virtio_features(vsc) & VIRTIO_F_RING_EVENT_IDX)
+ virtio_start_vq_intr(vsc, vp->vp_tx);
+
while (tp->t_outq.c_cc > 0) {
ret = virtio_enqueue_prep(vsc, vq, &slot);
if (ret == EAGAIN) {
@@ -551,6 +891,7 @@ vioconstart(struct tty *tp)
vp->vp_tx_buf - vp->vp_rx_buf + slot * BUFSIZE, cnt, 1);
virtio_enqueue_commit(vsc, vq, slot, 0);
ndone++;
+ ttypull(tp);
}
if (ndone > 0)
virtio_notify(vsc, vq);
@@ -611,9 +952,8 @@ vioconopen(dev_t dev, int flag, int mode, struct lwp *l)
}
vp = sc->sc_ports[port];
tp = vp->vp_tty;
-#ifdef NOTYET
vp->vp_guest_open = 1;
-#endif
+
splx(s);
if (kauth_authorize_device_tty(l->l_cred, KAUTH_DEVICE_TTY_OPEN, tp))
@@ -638,7 +978,18 @@ vioconopen(dev_t dev, int flag, int mode, struct lwp *l)
}
splx(s);
+ error = ttyopen(tp, TTDIALOUT(dev), ISSET(flag, O_NONBLOCK));
+ if (error)
+ goto bad;
+
error = (*tp->t_linesw->l_open)(dev, tp);
+ if (error)
+ goto bad;
+
+ if ((virtio_features(sc->sc_virtio) & VIRTIO_CONSOLE_F_MULTIPORT) != 0) {
+ viocon_control_send(sc, port, VIRTIO_CONSOLE_PORT_OPEN, 1);
+ }
+bad:
return error;
}
@@ -654,13 +1005,18 @@ vioconclose(dev_t dev, int flag, int mode, struct lwp *l)
(*tp->t_linesw->l_close)(tp, flag);
s = spltty();
-#ifdef NOTYET
vp->vp_guest_open = 0;
-#endif
+
CLR(tp->t_state, TS_BUSY | TS_FLUSH);
ttyclose(tp);
splx(s);
+ if ((virtio_features(vp->vp_sc->sc_virtio) &
+ VIRTIO_CONSOLE_F_MULTIPORT) != 0) {
+ viocon_control_send(vp->vp_sc, VIOCONPORT(dev),
+ VIRTIO_CONSOLE_PORT_OPEN, 0);
+ }
+
return 0;
}
@@ -789,3 +1145,15 @@ viocon_cnputc(dev_t dev, int c)
KERNEL_UNLOCK_ONE(NULL);
splx(s);
}
+
+static int
+vioconpoll(dev_t dev, int events, struct lwp *l)
+{
+ struct viocon_port *vp = dev2port(dev);
+ struct tty *tp = vp->vp_tty;
+ int revents;
+
+ revents = tp->t_linesw->l_poll(tp, events, l);
+
+ return revents;
+}
------------------------------------------------------------------------
Emile `iMil' Heitor <imil@{home.imil.net,NetBSD.org}> | https://imil.net
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