529 lines
14 KiB
C
529 lines
14 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 Microsoft
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*
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* Portions of this code is derived from hyperv_fb.c
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*/
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#include <linux/hyperv.h>
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#include <drm/drm_print.h>
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#include <drm/drm_simple_kms_helper.h>
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#include "hyperv_drm.h"
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#define VMBUS_RING_BUFSIZE (256 * 1024)
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#define VMBUS_VSP_TIMEOUT (10 * HZ)
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#define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
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#define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff)
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#define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16)
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/* Support for VERSION_WIN7 is removed. #define is retained for reference. */
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#define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)
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#define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2)
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#define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5)
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#define SYNTHVID_DEPTH_WIN8 32
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#define SYNTHVID_WIDTH_WIN8 1600
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#define SYNTHVID_HEIGHT_WIN8 1200
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#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
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enum pipe_msg_type {
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PIPE_MSG_INVALID,
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PIPE_MSG_DATA,
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PIPE_MSG_MAX
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};
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enum synthvid_msg_type {
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SYNTHVID_ERROR = 0,
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SYNTHVID_VERSION_REQUEST = 1,
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SYNTHVID_VERSION_RESPONSE = 2,
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SYNTHVID_VRAM_LOCATION = 3,
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SYNTHVID_VRAM_LOCATION_ACK = 4,
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SYNTHVID_SITUATION_UPDATE = 5,
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SYNTHVID_SITUATION_UPDATE_ACK = 6,
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SYNTHVID_POINTER_POSITION = 7,
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SYNTHVID_POINTER_SHAPE = 8,
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SYNTHVID_FEATURE_CHANGE = 9,
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SYNTHVID_DIRT = 10,
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SYNTHVID_RESOLUTION_REQUEST = 13,
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SYNTHVID_RESOLUTION_RESPONSE = 14,
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SYNTHVID_MAX = 15
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};
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struct pipe_msg_hdr {
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u32 type;
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u32 size; /* size of message after this field */
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} __packed;
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struct hvd_screen_info {
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u16 width;
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u16 height;
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} __packed;
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struct synthvid_msg_hdr {
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u32 type;
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u32 size; /* size of this header + payload after this field */
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} __packed;
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struct synthvid_version_req {
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u32 version;
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} __packed;
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struct synthvid_version_resp {
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u32 version;
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u8 is_accepted;
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u8 max_video_outputs;
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} __packed;
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struct synthvid_vram_location {
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u64 user_ctx;
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u8 is_vram_gpa_specified;
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u64 vram_gpa;
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} __packed;
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struct synthvid_vram_location_ack {
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u64 user_ctx;
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} __packed;
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struct video_output_situation {
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u8 active;
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u32 vram_offset;
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u8 depth_bits;
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u32 width_pixels;
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u32 height_pixels;
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u32 pitch_bytes;
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} __packed;
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struct synthvid_situation_update {
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u64 user_ctx;
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u8 video_output_count;
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struct video_output_situation video_output[1];
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} __packed;
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struct synthvid_situation_update_ack {
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u64 user_ctx;
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} __packed;
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struct synthvid_pointer_position {
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u8 is_visible;
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u8 video_output;
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s32 image_x;
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s32 image_y;
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} __packed;
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#define SYNTHVID_CURSOR_MAX_X 96
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#define SYNTHVID_CURSOR_MAX_Y 96
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#define SYNTHVID_CURSOR_ARGB_PIXEL_SIZE 4
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#define SYNTHVID_CURSOR_MAX_SIZE (SYNTHVID_CURSOR_MAX_X * \
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SYNTHVID_CURSOR_MAX_Y * SYNTHVID_CURSOR_ARGB_PIXEL_SIZE)
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#define SYNTHVID_CURSOR_COMPLETE (-1)
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struct synthvid_pointer_shape {
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u8 part_idx;
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u8 is_argb;
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u32 width; /* SYNTHVID_CURSOR_MAX_X at most */
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u32 height; /* SYNTHVID_CURSOR_MAX_Y at most */
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u32 hot_x; /* hotspot relative to upper-left of pointer image */
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u32 hot_y;
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u8 data[4];
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} __packed;
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struct synthvid_feature_change {
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u8 is_dirt_needed;
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u8 is_ptr_pos_needed;
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u8 is_ptr_shape_needed;
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u8 is_situ_needed;
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} __packed;
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struct rect {
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s32 x1, y1; /* top left corner */
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s32 x2, y2; /* bottom right corner, exclusive */
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} __packed;
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struct synthvid_dirt {
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u8 video_output;
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u8 dirt_count;
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struct rect rect[1];
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} __packed;
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#define SYNTHVID_EDID_BLOCK_SIZE 128
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#define SYNTHVID_MAX_RESOLUTION_COUNT 64
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struct synthvid_supported_resolution_req {
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u8 maximum_resolution_count;
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} __packed;
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struct synthvid_supported_resolution_resp {
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u8 edid_block[SYNTHVID_EDID_BLOCK_SIZE];
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u8 resolution_count;
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u8 default_resolution_index;
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u8 is_standard;
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struct hvd_screen_info supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT];
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} __packed;
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struct synthvid_msg {
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struct pipe_msg_hdr pipe_hdr;
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struct synthvid_msg_hdr vid_hdr;
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union {
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struct synthvid_version_req ver_req;
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struct synthvid_version_resp ver_resp;
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struct synthvid_vram_location vram;
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struct synthvid_vram_location_ack vram_ack;
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struct synthvid_situation_update situ;
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struct synthvid_situation_update_ack situ_ack;
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struct synthvid_pointer_position ptr_pos;
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struct synthvid_pointer_shape ptr_shape;
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struct synthvid_feature_change feature_chg;
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struct synthvid_dirt dirt;
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struct synthvid_supported_resolution_req resolution_req;
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struct synthvid_supported_resolution_resp resolution_resp;
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};
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} __packed;
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static inline bool hyperv_version_ge(u32 ver1, u32 ver2)
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{
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if (SYNTHVID_VER_GET_MAJOR(ver1) > SYNTHVID_VER_GET_MAJOR(ver2) ||
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(SYNTHVID_VER_GET_MAJOR(ver1) == SYNTHVID_VER_GET_MAJOR(ver2) &&
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SYNTHVID_VER_GET_MINOR(ver1) >= SYNTHVID_VER_GET_MINOR(ver2)))
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return true;
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return false;
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}
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static inline int hyperv_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg)
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{
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static atomic64_t request_id = ATOMIC64_INIT(0);
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struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
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int ret;
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msg->pipe_hdr.type = PIPE_MSG_DATA;
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msg->pipe_hdr.size = msg->vid_hdr.size;
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ret = vmbus_sendpacket(hdev->channel, msg,
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msg->vid_hdr.size + sizeof(struct pipe_msg_hdr),
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atomic64_inc_return(&request_id),
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VM_PKT_DATA_INBAND, 0);
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if (ret)
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drm_err_ratelimited(&hv->dev, "Unable to send packet via vmbus; error %d\n", ret);
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return ret;
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}
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static int hyperv_negotiate_version(struct hv_device *hdev, u32 ver)
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{
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struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
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struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
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struct drm_device *dev = &hv->dev;
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unsigned long t;
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memset(msg, 0, sizeof(struct synthvid_msg));
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msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST;
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msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_version_req);
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msg->ver_req.version = ver;
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hyperv_sendpacket(hdev, msg);
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t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
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if (!t) {
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drm_err(dev, "Time out on waiting version response\n");
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return -ETIMEDOUT;
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}
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if (!msg->ver_resp.is_accepted) {
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drm_err(dev, "Version request not accepted\n");
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return -ENODEV;
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}
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hv->synthvid_version = ver;
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drm_info(dev, "Synthvid Version major %d, minor %d\n",
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SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver));
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return 0;
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}
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int hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp)
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{
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struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
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struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
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struct drm_device *dev = &hv->dev;
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unsigned long t;
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memset(msg, 0, sizeof(struct synthvid_msg));
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msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION;
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msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_vram_location);
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msg->vram.user_ctx = vram_pp;
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msg->vram.vram_gpa = vram_pp;
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msg->vram.is_vram_gpa_specified = 1;
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hyperv_sendpacket(hdev, msg);
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t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
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if (!t) {
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drm_err(dev, "Time out on waiting vram location ack\n");
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return -ETIMEDOUT;
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}
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if (msg->vram_ack.user_ctx != vram_pp) {
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drm_err(dev, "Unable to set VRAM location\n");
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return -ENODEV;
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}
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return 0;
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}
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int hyperv_update_situation(struct hv_device *hdev, u8 active, u32 bpp,
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u32 w, u32 h, u32 pitch)
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{
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struct synthvid_msg msg;
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memset(&msg, 0, sizeof(struct synthvid_msg));
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msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE;
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msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_situation_update);
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msg.situ.user_ctx = 0;
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msg.situ.video_output_count = 1;
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msg.situ.video_output[0].active = active;
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/* vram_offset should always be 0 */
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msg.situ.video_output[0].vram_offset = 0;
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msg.situ.video_output[0].depth_bits = bpp;
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msg.situ.video_output[0].width_pixels = w;
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msg.situ.video_output[0].height_pixels = h;
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msg.situ.video_output[0].pitch_bytes = pitch;
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hyperv_sendpacket(hdev, &msg);
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return 0;
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}
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/*
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* Hyper-V supports a hardware cursor feature. It's not used by Linux VM,
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* but the Hyper-V host still draws a point as an extra mouse pointer,
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* which is unwanted, especially when Xorg is running.
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*
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* The hyperv_fb driver uses synthvid_send_ptr() to hide the unwanted
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* pointer, by setting msg.ptr_pos.is_visible = 1 and setting the
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* msg.ptr_shape.data. Note: setting msg.ptr_pos.is_visible to 0 doesn't
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* work in tests.
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*
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* Copy synthvid_send_ptr() to hyperv_drm and rename it to
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* hyperv_hide_hw_ptr(). Note: hyperv_hide_hw_ptr() is also called in the
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* handler of the SYNTHVID_FEATURE_CHANGE event, otherwise the host still
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* draws an extra unwanted mouse pointer after the VM Connection window is
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* closed and reopened.
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*/
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int hyperv_hide_hw_ptr(struct hv_device *hdev)
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{
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struct synthvid_msg msg;
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memset(&msg, 0, sizeof(struct synthvid_msg));
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msg.vid_hdr.type = SYNTHVID_POINTER_POSITION;
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msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_pointer_position);
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msg.ptr_pos.is_visible = 1;
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msg.ptr_pos.video_output = 0;
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msg.ptr_pos.image_x = 0;
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msg.ptr_pos.image_y = 0;
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hyperv_sendpacket(hdev, &msg);
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memset(&msg, 0, sizeof(struct synthvid_msg));
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msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE;
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msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_pointer_shape);
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msg.ptr_shape.part_idx = SYNTHVID_CURSOR_COMPLETE;
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msg.ptr_shape.is_argb = 1;
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msg.ptr_shape.width = 1;
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msg.ptr_shape.height = 1;
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msg.ptr_shape.hot_x = 0;
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msg.ptr_shape.hot_y = 0;
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msg.ptr_shape.data[0] = 0;
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msg.ptr_shape.data[1] = 1;
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msg.ptr_shape.data[2] = 1;
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msg.ptr_shape.data[3] = 1;
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hyperv_sendpacket(hdev, &msg);
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return 0;
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}
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int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect)
|
||
|
|
{
|
||
|
|
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||
|
|
struct synthvid_msg msg;
|
||
|
|
|
||
|
|
if (!hv->dirt_needed)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
memset(&msg, 0, sizeof(struct synthvid_msg));
|
||
|
|
|
||
|
|
msg.vid_hdr.type = SYNTHVID_DIRT;
|
||
|
|
msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||
|
|
sizeof(struct synthvid_dirt);
|
||
|
|
msg.dirt.video_output = 0;
|
||
|
|
msg.dirt.dirt_count = 1;
|
||
|
|
msg.dirt.rect[0].x1 = rect->x1;
|
||
|
|
msg.dirt.rect[0].y1 = rect->y1;
|
||
|
|
msg.dirt.rect[0].x2 = rect->x2;
|
||
|
|
msg.dirt.rect[0].y2 = rect->y2;
|
||
|
|
|
||
|
|
hyperv_sendpacket(hdev, &msg);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int hyperv_get_supported_resolution(struct hv_device *hdev)
|
||
|
|
{
|
||
|
|
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||
|
|
struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf;
|
||
|
|
struct drm_device *dev = &hv->dev;
|
||
|
|
unsigned long t;
|
||
|
|
u8 index;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
memset(msg, 0, sizeof(struct synthvid_msg));
|
||
|
|
msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST;
|
||
|
|
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
|
||
|
|
sizeof(struct synthvid_supported_resolution_req);
|
||
|
|
msg->resolution_req.maximum_resolution_count =
|
||
|
|
SYNTHVID_MAX_RESOLUTION_COUNT;
|
||
|
|
hyperv_sendpacket(hdev, msg);
|
||
|
|
|
||
|
|
t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT);
|
||
|
|
if (!t) {
|
||
|
|
drm_err(dev, "Time out on waiting resolution response\n");
|
||
|
|
return -ETIMEDOUT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (msg->resolution_resp.resolution_count == 0) {
|
||
|
|
drm_err(dev, "No supported resolutions\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
index = msg->resolution_resp.default_resolution_index;
|
||
|
|
if (index >= msg->resolution_resp.resolution_count) {
|
||
|
|
drm_err(dev, "Invalid resolution index: %d\n", index);
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < msg->resolution_resp.resolution_count; i++) {
|
||
|
|
hv->screen_width_max = max_t(u32, hv->screen_width_max,
|
||
|
|
msg->resolution_resp.supported_resolution[i].width);
|
||
|
|
hv->screen_height_max = max_t(u32, hv->screen_height_max,
|
||
|
|
msg->resolution_resp.supported_resolution[i].height);
|
||
|
|
}
|
||
|
|
|
||
|
|
hv->preferred_width =
|
||
|
|
msg->resolution_resp.supported_resolution[index].width;
|
||
|
|
hv->preferred_height =
|
||
|
|
msg->resolution_resp.supported_resolution[index].height;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void hyperv_receive_sub(struct hv_device *hdev)
|
||
|
|
{
|
||
|
|
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||
|
|
struct synthvid_msg *msg;
|
||
|
|
|
||
|
|
if (!hv)
|
||
|
|
return;
|
||
|
|
|
||
|
|
msg = (struct synthvid_msg *)hv->recv_buf;
|
||
|
|
|
||
|
|
/* Complete the wait event */
|
||
|
|
if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE ||
|
||
|
|
msg->vid_hdr.type == SYNTHVID_RESOLUTION_RESPONSE ||
|
||
|
|
msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) {
|
||
|
|
memcpy(hv->init_buf, msg, VMBUS_MAX_PACKET_SIZE);
|
||
|
|
complete(&hv->wait);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) {
|
||
|
|
hv->dirt_needed = msg->feature_chg.is_dirt_needed;
|
||
|
|
if (hv->dirt_needed)
|
||
|
|
hyperv_hide_hw_ptr(hv->hdev);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void hyperv_receive(void *ctx)
|
||
|
|
{
|
||
|
|
struct hv_device *hdev = ctx;
|
||
|
|
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||
|
|
struct synthvid_msg *recv_buf;
|
||
|
|
u32 bytes_recvd;
|
||
|
|
u64 req_id;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!hv)
|
||
|
|
return;
|
||
|
|
|
||
|
|
recv_buf = (struct synthvid_msg *)hv->recv_buf;
|
||
|
|
|
||
|
|
do {
|
||
|
|
ret = vmbus_recvpacket(hdev->channel, recv_buf,
|
||
|
|
VMBUS_MAX_PACKET_SIZE,
|
||
|
|
&bytes_recvd, &req_id);
|
||
|
|
if (bytes_recvd > 0 &&
|
||
|
|
recv_buf->pipe_hdr.type == PIPE_MSG_DATA)
|
||
|
|
hyperv_receive_sub(hdev);
|
||
|
|
} while (bytes_recvd > 0 && ret == 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
int hyperv_connect_vsp(struct hv_device *hdev)
|
||
|
|
{
|
||
|
|
struct hyperv_drm_device *hv = hv_get_drvdata(hdev);
|
||
|
|
struct drm_device *dev = &hv->dev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = vmbus_open(hdev->channel, VMBUS_RING_BUFSIZE, VMBUS_RING_BUFSIZE,
|
||
|
|
NULL, 0, hyperv_receive, hdev);
|
||
|
|
if (ret) {
|
||
|
|
drm_err(dev, "Unable to open vmbus channel\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Negotiate the protocol version with host */
|
||
|
|
switch (vmbus_proto_version) {
|
||
|
|
case VERSION_WIN10:
|
||
|
|
case VERSION_WIN10_V5:
|
||
|
|
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10);
|
||
|
|
if (!ret)
|
||
|
|
break;
|
||
|
|
fallthrough;
|
||
|
|
case VERSION_WIN8:
|
||
|
|
case VERSION_WIN8_1:
|
||
|
|
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN8);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret) {
|
||
|
|
drm_err(dev, "Synthetic video device version not accepted %d\n", ret);
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
hv->screen_depth = SYNTHVID_DEPTH_WIN8;
|
||
|
|
|
||
|
|
if (hyperv_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) {
|
||
|
|
ret = hyperv_get_supported_resolution(hdev);
|
||
|
|
if (ret)
|
||
|
|
drm_err(dev, "Failed to get supported resolution from host, use default\n");
|
||
|
|
} else {
|
||
|
|
hv->screen_width_max = SYNTHVID_WIDTH_WIN8;
|
||
|
|
hv->screen_height_max = SYNTHVID_HEIGHT_WIN8;
|
||
|
|
}
|
||
|
|
|
||
|
|
hv->mmio_megabytes = hdev->channel->offermsg.offer.mmio_megabytes;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
error:
|
||
|
|
vmbus_close(hdev->channel);
|
||
|
|
return ret;
|
||
|
|
}
|