hv_hid: Hyper-V HID driver
Hyper-V HID driver using hidbus/hms. Reviewed by: wulf MFC after: 1 week PR: 221074 Differential revision: https://reviews.freebsd.org/D38140
This commit is contained in:
Yuri
Vladimir Kondratyev
parent
edfc7d6e5b
commit
e4d3f1e40a
@ -501,6 +501,7 @@ device kvm_clock # KVM paravirtual clock driver
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# Microsoft Hyper-V enhancement support
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device hyperv # HyperV drivers
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device hvhid # HyperV HID device
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# Xen HVM Guest Optimizations
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options XENHVM # Xen HVM kernel infrastructure
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@ -115,6 +115,7 @@ dev/hwpmc/hwpmc_uncore.c optional hwpmc
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dev/hwpmc/hwpmc_tsc.c optional hwpmc
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dev/hwpmc/hwpmc_x86.c optional hwpmc
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dev/hyperv/hvsock/hv_sock.c optional hyperv
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dev/hyperv/input/hv_hid.c optional hyperv hvhid
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dev/hyperv/input/hv_kbd.c optional hyperv
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dev/hyperv/input/hv_kbdc.c optional hyperv
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dev/hyperv/pcib/vmbus_pcib.c optional hyperv pci
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@ -924,5 +924,6 @@ driver_t hidbus_driver = {
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MODULE_DEPEND(hidbus, hid, 1, 1, 1);
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MODULE_VERSION(hidbus, 1);
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DRIVER_MODULE(hidbus, hvhid, hidbus_driver, 0, 0);
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DRIVER_MODULE(hidbus, iichid, hidbus_driver, 0, 0);
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DRIVER_MODULE(hidbus, usbhid, hidbus_driver, 0, 0);
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564
sys/dev/hyperv/input/hv_hid.c
Normal file
564
sys/dev/hyperv/input/hv_hid.c
Normal file
@ -0,0 +1,564 @@
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/*-
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* Copyright (c) 2017 Microsoft Corp.
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* Copyright (c) 2023 Yuri <yuri@aetern.org>
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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/param.h>
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#include <sys/bus.h>
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#include <sys/cdefs.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <dev/evdev/input.h>
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#include <dev/hid/hid.h>
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#include <dev/hyperv/include/hyperv.h>
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#include <dev/hyperv/include/vmbus_xact.h>
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#include <dev/hyperv/utilities/hv_utilreg.h>
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#include <dev/hyperv/utilities/vmbus_icreg.h>
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#include <dev/hyperv/utilities/vmbus_icvar.h>
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#include "hid_if.h"
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#include "vmbus_if.h"
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#define HV_HID_VER_MAJOR 2
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#define HV_HID_VER_MINOR 0
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#define HV_HID_VER (HV_HID_VER_MINOR | (HV_HID_VER_MAJOR) << 16)
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#define HV_BUFSIZ (4 * PAGE_SIZE)
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#define HV_HID_RINGBUFF_SEND_SZ (10 * PAGE_SIZE)
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#define HV_HID_RINGBUFF_RECV_SZ (10 * PAGE_SIZE)
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typedef struct {
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device_t dev;
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struct mtx mtx;
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/* vmbus */
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struct vmbus_channel *hs_chan;
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struct vmbus_xact_ctx *hs_xact_ctx;
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uint8_t *buf;
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int buflen;
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/* hid */
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struct hid_device_info hdi;
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hid_intr_t *intr;
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bool intr_on;
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void *intr_ctx;
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uint8_t *rdesc;
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} hv_hid_sc;
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typedef enum {
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SH_PROTO_REQ,
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SH_PROTO_RESP,
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SH_DEVINFO,
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SH_DEVINFO_ACK,
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SH_INPUT_REPORT,
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} sh_msg_type;
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typedef struct {
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sh_msg_type type;
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uint32_t size;
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} __packed sh_msg_hdr;
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typedef struct {
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sh_msg_hdr hdr;
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char data[];
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} __packed sh_msg;
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typedef struct {
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sh_msg_hdr hdr;
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uint32_t ver;
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} __packed sh_proto_req;
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typedef struct {
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sh_msg_hdr hdr;
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uint32_t ver;
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uint32_t app;
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} __packed sh_proto_resp;
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typedef struct {
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u_int size;
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u_short vendor;
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u_short product;
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u_short version;
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u_short reserved[11];
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} __packed sh_devinfo;
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/* Copied from linux/hid.h */
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typedef struct {
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uint8_t bDescriptorType;
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uint16_t wDescriptorLength;
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} __packed sh_hcdesc;
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typedef struct {
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uint8_t bLength;
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uint8_t bDescriptorType;
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uint16_t bcdHID;
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uint8_t bCountryCode;
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uint8_t bNumDescriptors;
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sh_hcdesc hcdesc[1];
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} __packed sh_hdesc;
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typedef struct {
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sh_msg_hdr hdr;
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sh_devinfo devinfo;
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sh_hdesc hdesc;
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} __packed sh_devinfo_resp;
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typedef struct {
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sh_msg_hdr hdr;
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uint8_t rsvd;
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} __packed sh_devinfo_ack;
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typedef struct {
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sh_msg_hdr hdr;
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char buffer[];
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} __packed sh_input_report;
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typedef enum {
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HV_HID_MSG_INVALID,
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HV_HID_MSG_DATA,
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} hv_hid_msg_type;
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typedef struct {
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hv_hid_msg_type type;
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uint32_t size;
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char data[];
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} hv_hid_pmsg;
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typedef struct {
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hv_hid_msg_type type;
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uint32_t size;
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union {
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sh_msg msg;
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sh_proto_req req;
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sh_proto_resp resp;
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sh_devinfo_resp dresp;
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sh_devinfo_ack ack;
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sh_input_report irep;
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};
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} hv_hid_msg;
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#define HV_HID_REQ_SZ (sizeof(hv_hid_pmsg) + sizeof(sh_proto_req))
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#define HV_HID_RESP_SZ (sizeof(hv_hid_pmsg) + sizeof(sh_proto_resp))
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#define HV_HID_ACK_SZ (sizeof(hv_hid_pmsg) + sizeof(sh_devinfo_ack))
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/* Somewhat arbitrary, enough to get the devinfo response */
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#define HV_HID_REQ_MAX 256
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#define HV_HID_RESP_MAX 256
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static const struct vmbus_ic_desc vmbus_hid_descs[] = {
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{
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.ic_guid = { .hv_guid = {
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0x9e, 0xb6, 0xa8, 0xcf, 0x4a, 0x5b, 0xc0, 0x4c,
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0xb9, 0x8b, 0x8b, 0xa1, 0xa1, 0xf3, 0xf9, 0x5a} },
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.ic_desc = "Hyper-V HID device"
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},
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VMBUS_IC_DESC_END
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};
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/* TODO: add GUID support to devmatch(8) to export vmbus_hid_descs directly */
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const struct {
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char *guid;
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} vmbus_hid_descs_pnp[] = {{ "cfa8b69e-5b4a-4cc0-b98b-8ba1a1f3f95a" }};
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static int hv_hid_attach(device_t dev);
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static int hv_hid_detach(device_t dev);
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static int
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hv_hid_connect_vsp(hv_hid_sc *sc)
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{
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struct vmbus_xact *xact;
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hv_hid_msg *req;
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const hv_hid_msg *resp;
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size_t resplen;
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int ret;
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xact = vmbus_xact_get(sc->hs_xact_ctx, HV_HID_REQ_SZ);
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if (xact == NULL) {
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device_printf(sc->dev, "no xact for init");
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return (ENODEV);
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}
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req = vmbus_xact_req_data(xact);
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req->type = HV_HID_MSG_DATA;
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req->size = sizeof(sh_proto_req);
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req->req.hdr.type = SH_PROTO_REQ;
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req->req.hdr.size = sizeof(u_int);
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req->req.ver = HV_HID_VER;
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vmbus_xact_activate(xact);
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ret = vmbus_chan_send(sc->hs_chan,
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VMBUS_CHANPKT_TYPE_INBAND,
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VMBUS_CHANPKT_FLAG_RC,
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req, HV_HID_REQ_SZ, (uint64_t)(uintptr_t)xact);
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if (ret != 0) {
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device_printf(sc->dev, "failed to send proto req\n");
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vmbus_xact_deactivate(xact);
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return (ret);
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}
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resp = vmbus_chan_xact_wait(sc->hs_chan, xact, &resplen, true);
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if (resplen != HV_HID_RESP_SZ || !resp->resp.app) {
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device_printf(sc->dev, "proto req failed\n");
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ret = ENODEV;
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}
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vmbus_xact_put(xact);
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return (ret);
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}
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static void
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hv_hid_receive(hv_hid_sc *sc, struct vmbus_chanpkt_hdr *pkt)
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{
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const hv_hid_msg *msg;
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sh_msg_type msg_type;
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uint32_t msg_len;
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void *rdesc;
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msg = VMBUS_CHANPKT_CONST_DATA(pkt);
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msg_len = VMBUS_CHANPKT_DATALEN(pkt);
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if (msg->type != HV_HID_MSG_DATA)
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return;
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if (msg_len <= sizeof(hv_hid_pmsg)) {
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device_printf(sc->dev, "invalid packet length\n");
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return;
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}
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msg_type = msg->msg.hdr.type;
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switch (msg_type) {
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case SH_PROTO_RESP: {
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struct vmbus_xact_ctx *xact_ctx;
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xact_ctx = sc->hs_xact_ctx;
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if (xact_ctx != NULL) {
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vmbus_xact_ctx_wakeup(xact_ctx,
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VMBUS_CHANPKT_CONST_DATA(pkt),
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VMBUS_CHANPKT_DATALEN(pkt));
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}
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break;
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}
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case SH_DEVINFO: {
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struct vmbus_xact *xact;
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struct hid_device_info *hdi;
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hv_hid_msg ack;
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const sh_devinfo *devinfo;
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const sh_hdesc *hdesc;
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/* Send ack */
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ack.type = HV_HID_MSG_DATA;
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ack.size = sizeof(sh_devinfo_ack);
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ack.ack.hdr.type = SH_DEVINFO_ACK;
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ack.ack.hdr.size = 1;
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ack.ack.rsvd = 0;
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xact = vmbus_xact_get(sc->hs_xact_ctx, HV_HID_ACK_SZ);
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if (xact == NULL)
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break;
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vmbus_xact_activate(xact);
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(void) vmbus_chan_send(sc->hs_chan, VMBUS_CHANPKT_TYPE_INBAND,
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0, &ack, HV_HID_ACK_SZ, (uint64_t)(uintptr_t)xact);
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vmbus_xact_deactivate(xact);
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vmbus_xact_put(xact);
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/* Check for resume from hibernation */
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if (sc->rdesc != NULL)
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break;
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/* Parse devinfo response */
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devinfo = &msg->dresp.devinfo;
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hdesc = &msg->dresp.hdesc;
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if (hdesc->bLength == 0)
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break;
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hdi = &sc->hdi;
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memset(hdi, 0, sizeof(*hdi));
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hdi->rdescsize = le16toh(hdesc->hcdesc[0].wDescriptorLength);
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if (hdi->rdescsize == 0)
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break;
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strlcpy(hdi->name, "Hyper-V", sizeof(hdi->name));
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hdi->idBus = BUS_VIRTUAL;
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hdi->idVendor = le16toh(devinfo->vendor);
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hdi->idProduct = le16toh(devinfo->product);
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hdi->idVersion = le16toh(devinfo->version);
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/* Save rdesc copy */
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rdesc = malloc(hdi->rdescsize, M_DEVBUF, M_WAITOK | M_ZERO);
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memcpy(rdesc, (const uint8_t *)hdesc + hdesc->bLength,
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hdi->rdescsize);
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mtx_lock(&sc->mtx);
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sc->rdesc = rdesc;
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wakeup(sc);
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mtx_unlock(&sc->mtx);
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break;
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}
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case SH_INPUT_REPORT: {
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mtx_lock(&sc->mtx);
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if (sc->intr != NULL && sc->intr_on)
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sc->intr(sc->intr_ctx,
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__DECONST(void *, msg->irep.buffer),
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msg->irep.hdr.size);
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mtx_unlock(&sc->mtx);
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break;
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}
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default:
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break;
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}
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}
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static void
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hv_hid_read_channel(struct vmbus_channel *channel, void *ctx)
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{
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hv_hid_sc *sc;
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uint8_t *buf;
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int buflen;
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int ret;
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sc = ctx;
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buf = sc->buf;
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buflen = sc->buflen;
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for (;;) {
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struct vmbus_chanpkt_hdr *pkt;
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int rcvd;
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pkt = (struct vmbus_chanpkt_hdr *)buf;
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rcvd = buflen;
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ret = vmbus_chan_recv_pkt(channel, pkt, &rcvd);
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if (__predict_false(ret == ENOBUFS)) {
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buflen = sc->buflen * 2;
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while (buflen < rcvd)
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buflen *= 2;
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buf = malloc(buflen, M_DEVBUF, M_WAITOK | M_ZERO);
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device_printf(sc->dev, "expand recvbuf %d -> %d\n",
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sc->buflen, buflen);
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free(sc->buf, M_DEVBUF);
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sc->buf = buf;
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sc->buflen = buflen;
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continue;
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} else if (__predict_false(ret == EAGAIN)) {
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/* No more channel packets; done! */
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break;
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}
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KASSERT(ret == 0, ("vmbus_chan_recv_pkt failed: %d", ret));
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switch (pkt->cph_type) {
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case VMBUS_CHANPKT_TYPE_COMP:
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case VMBUS_CHANPKT_TYPE_RXBUF:
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device_printf(sc->dev, "unhandled event: %d\n",
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pkt->cph_type);
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break;
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case VMBUS_CHANPKT_TYPE_INBAND:
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hv_hid_receive(sc, pkt);
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break;
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default:
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device_printf(sc->dev, "unknown event: %d\n",
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pkt->cph_type);
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break;
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}
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}
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}
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static int
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hv_hid_probe(device_t dev)
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{
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device_t bus;
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const struct vmbus_ic_desc *d;
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if (resource_disabled(device_get_name(dev), 0))
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return (ENXIO);
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bus = device_get_parent(dev);
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for (d = vmbus_hid_descs; d->ic_desc != NULL; ++d) {
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if (VMBUS_PROBE_GUID(bus, dev, &d->ic_guid) == 0) {
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device_set_desc(dev, d->ic_desc);
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return (BUS_PROBE_DEFAULT);
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}
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}
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return (ENXIO);
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}
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static int
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hv_hid_attach(device_t dev)
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{
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device_t child;
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hv_hid_sc *sc;
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int ret;
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sc = device_get_softc(dev);
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sc->dev = dev;
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mtx_init(&sc->mtx, "hvhid lock", NULL, MTX_DEF);
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sc->hs_chan = vmbus_get_channel(dev);
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sc->hs_xact_ctx = vmbus_xact_ctx_create(bus_get_dma_tag(dev),
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HV_HID_REQ_MAX, HV_HID_RESP_MAX, 0);
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if (sc->hs_xact_ctx == NULL) {
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ret = ENOMEM;
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goto out;
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}
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sc->buflen = HV_BUFSIZ;
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sc->buf = malloc(sc->buflen, M_DEVBUF, M_WAITOK | M_ZERO);
|
||||
vmbus_chan_set_readbatch(sc->hs_chan, false);
|
||||
ret = vmbus_chan_open(sc->hs_chan, HV_HID_RINGBUFF_SEND_SZ,
|
||||
HV_HID_RINGBUFF_RECV_SZ, NULL, 0, hv_hid_read_channel, sc);
|
||||
if (ret != 0)
|
||||
goto out;
|
||||
ret = hv_hid_connect_vsp(sc);
|
||||
if (ret != 0)
|
||||
goto out;
|
||||
|
||||
/* Wait until we have devinfo (or arbitrary timeout of 3s) */
|
||||
mtx_lock(&sc->mtx);
|
||||
if (sc->rdesc == NULL)
|
||||
ret = mtx_sleep(sc, &sc->mtx, 0, "hvhid", hz * 3);
|
||||
mtx_unlock(&sc->mtx);
|
||||
if (ret != 0) {
|
||||
ret = ENODEV;
|
||||
goto out;
|
||||
}
|
||||
child = device_add_child(sc->dev, "hidbus", -1);
|
||||
if (child == NULL) {
|
||||
device_printf(sc->dev, "failed to add hidbus\n");
|
||||
ret = ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
device_set_ivars(child, &sc->hdi);
|
||||
ret = bus_generic_attach(dev);
|
||||
if (ret != 0)
|
||||
device_printf(sc->dev, "failed to attach hidbus\n");
|
||||
out:
|
||||
if (ret != 0)
|
||||
hv_hid_detach(dev);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
static int
|
||||
hv_hid_detach(device_t dev)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
int ret;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
ret = device_delete_children(dev);
|
||||
if (ret != 0)
|
||||
return (ret);
|
||||
if (sc->hs_xact_ctx != NULL)
|
||||
vmbus_xact_ctx_destroy(sc->hs_xact_ctx);
|
||||
vmbus_chan_close(vmbus_get_channel(dev));
|
||||
free(sc->buf, M_DEVBUF);
|
||||
free(sc->rdesc, M_DEVBUF);
|
||||
mtx_destroy(&sc->mtx);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
hv_hid_intr_setup(device_t dev, hid_intr_t intr, void *ctx,
|
||||
struct hid_rdesc_info *rdesc)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
|
||||
if (intr == NULL)
|
||||
return;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->intr = intr;
|
||||
sc->intr_on = false;
|
||||
sc->intr_ctx = ctx;
|
||||
rdesc->rdsize = rdesc->isize;
|
||||
}
|
||||
|
||||
static void
|
||||
hv_hid_intr_unsetup(device_t dev)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->intr = NULL;
|
||||
sc->intr_on = false;
|
||||
sc->intr_ctx = NULL;
|
||||
}
|
||||
|
||||
static int
|
||||
hv_hid_intr_start(device_t dev)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
mtx_lock(&sc->mtx);
|
||||
sc->intr_on = true;
|
||||
mtx_unlock(&sc->mtx);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
hv_hid_intr_stop(device_t dev)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
mtx_lock(&sc->mtx);
|
||||
sc->intr_on = false;
|
||||
mtx_unlock(&sc->mtx);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
hv_hid_get_rdesc(device_t dev, void *buf, hid_size_t len)
|
||||
{
|
||||
hv_hid_sc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
if (len < sc->hdi.rdescsize)
|
||||
return (EMSGSIZE);
|
||||
memcpy(buf, sc->rdesc, len);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static device_method_t hv_hid_methods[] = {
|
||||
DEVMETHOD(device_probe, hv_hid_probe),
|
||||
DEVMETHOD(device_attach, hv_hid_attach),
|
||||
DEVMETHOD(device_detach, hv_hid_detach),
|
||||
|
||||
DEVMETHOD(hid_intr_setup, hv_hid_intr_setup),
|
||||
DEVMETHOD(hid_intr_unsetup, hv_hid_intr_unsetup),
|
||||
DEVMETHOD(hid_intr_start, hv_hid_intr_start),
|
||||
DEVMETHOD(hid_intr_stop, hv_hid_intr_stop),
|
||||
|
||||
DEVMETHOD(hid_get_rdesc, hv_hid_get_rdesc),
|
||||
DEVMETHOD_END,
|
||||
};
|
||||
|
||||
static driver_t hv_hid_driver = {
|
||||
.name = "hvhid",
|
||||
.methods = hv_hid_methods,
|
||||
.size = sizeof(hv_hid_sc),
|
||||
};
|
||||
|
||||
DRIVER_MODULE(hv_hid, vmbus, hv_hid_driver, NULL, NULL);
|
||||
MODULE_VERSION(hv_hid, 1);
|
||||
MODULE_DEPEND(hv_hid, hidbus, 1, 1, 1);
|
||||
MODULE_DEPEND(hv_hid, hms, 1, 1, 1);
|
||||
MODULE_DEPEND(hv_hid, vmbus, 1, 1, 1);
|
||||
MODULE_PNP_INFO("Z:classid", vmbus, hv_hid, vmbus_hid_descs_pnp,
|
||||
nitems(vmbus_hid_descs_pnp));
|
||||
@ -703,6 +703,7 @@ device kvm_clock # KVM paravirtual clock driver
|
||||
|
||||
options HYPERV
|
||||
device hyperv # HyperV drivers
|
||||
device hvhid # HyperV HID device
|
||||
|
||||
#####################################################################
|
||||
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
# $FreeBSD$
|
||||
|
||||
SUBDIR = vmbus netvsc storvsc utilities hvsock
|
||||
SUBDIR = vmbus netvsc storvsc utilities hvsock hid
|
||||
|
||||
.include <bsd.subdir.mk>
|
||||
|
||||
12
sys/modules/hyperv/hid/Makefile
Normal file
12
sys/modules/hyperv/hid/Makefile
Normal file
@ -0,0 +1,12 @@
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${SRCTOP}/sys/dev/hyperv/input
|
||||
|
||||
KMOD= hv_hid
|
||||
SRCS= hv_hid.c
|
||||
SRCS+= bus_if.h device_if.h hid_if.h vmbus_if.h
|
||||
|
||||
CFLAGS+= -I${SRCTOP}/sys/dev/hyperv/include \
|
||||
-I${SRCTOP}/sys/dev/hyperv/vmbus
|
||||
|
||||
.include <bsd.kmod.mk>
|
||||
Loading…
Reference in New Issue
Block a user