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![Nicholas Mc Guire](/assets/img/avatar_default.png)
The return type of wait_for_completion_timeout is unsigned long not int. This patch fixes up the declarations only. Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
965 lines
23 KiB
C
965 lines
23 KiB
C
/*
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* Copyright (c) 2012, Microsoft Corporation.
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*
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* Author:
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* Haiyang Zhang <haiyangz@microsoft.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*/
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/*
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* Hyper-V Synthetic Video Frame Buffer Driver
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*
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* This is the driver for the Hyper-V Synthetic Video, which supports
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* screen resolution up to Full HD 1920x1080 with 32 bit color on Windows
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* Server 2012, and 1600x1200 with 16 bit color on Windows Server 2008 R2
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* or earlier.
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*
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* It also solves the double mouse cursor issue of the emulated video mode.
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*
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* The default screen resolution is 1152x864, which may be changed by a
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* kernel parameter:
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* video=hyperv_fb:<width>x<height>
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* For example: video=hyperv_fb:1280x1024
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*
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* Portrait orientation is also supported:
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* For example: video=hyperv_fb:864x1152
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/completion.h>
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#include <linux/fb.h>
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#include <linux/pci.h>
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#include <linux/efi.h>
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#include <linux/hyperv.h>
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/* Hyper-V Synthetic Video Protocol definitions and structures */
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#define MAX_VMBUS_PKT_SIZE 0x4000
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#define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))
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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_DEPTH_WIN7 16
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#define SYNTHVID_DEPTH_WIN8 32
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#define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
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#define SYNTHVID_WIDTH_MAX_WIN7 1600
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#define SYNTHVID_HEIGHT_MAX_WIN7 1200
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#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
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#define PCI_VENDOR_ID_MICROSOFT 0x1414
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#define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353
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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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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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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_MAX = 11
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};
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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 CURSOR_MAX_X 96
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#define CURSOR_MAX_Y 96
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#define CURSOR_ARGB_PIXEL_SIZE 4
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#define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE)
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#define 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; /* CURSOR_MAX_X at most */
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u32 height; /* 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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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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};
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} __packed;
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/* FB driver definitions and structures */
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#define HVFB_WIDTH 1152 /* default screen width */
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#define HVFB_HEIGHT 864 /* default screen height */
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#define HVFB_WIDTH_MIN 640
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#define HVFB_HEIGHT_MIN 480
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#define RING_BUFSIZE (256 * 1024)
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#define VSP_TIMEOUT (10 * HZ)
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#define HVFB_UPDATE_DELAY (HZ / 20)
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struct hvfb_par {
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struct fb_info *info;
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struct resource mem;
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bool fb_ready; /* fb device is ready */
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struct completion wait;
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u32 synthvid_version;
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struct delayed_work dwork;
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bool update;
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u32 pseudo_palette[16];
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u8 init_buf[MAX_VMBUS_PKT_SIZE];
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u8 recv_buf[MAX_VMBUS_PKT_SIZE];
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/* If true, the VSC notifies the VSP on every framebuffer change */
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bool synchronous_fb;
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struct notifier_block hvfb_panic_nb;
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};
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static uint screen_width = HVFB_WIDTH;
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static uint screen_height = HVFB_HEIGHT;
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static uint screen_depth;
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static uint screen_fb_size;
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/* Send message to Hyper-V host */
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static inline int synthvid_send(struct hv_device *hdev,
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struct synthvid_msg *msg)
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{
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static atomic64_t request_id = ATOMIC64_INIT(0);
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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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pr_err("Unable to send packet via vmbus\n");
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return ret;
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}
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/* Send screen resolution info to host */
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static int synthvid_send_situ(struct hv_device *hdev)
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{
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struct fb_info *info = hv_get_drvdata(hdev);
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struct synthvid_msg msg;
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if (!info)
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return -ENODEV;
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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 = 1;
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msg.situ.video_output[0].vram_offset = 0;
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msg.situ.video_output[0].depth_bits = info->var.bits_per_pixel;
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msg.situ.video_output[0].width_pixels = info->var.xres;
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msg.situ.video_output[0].height_pixels = info->var.yres;
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msg.situ.video_output[0].pitch_bytes = info->fix.line_length;
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synthvid_send(hdev, &msg);
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return 0;
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}
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/* Send mouse pointer info to host */
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static int synthvid_send_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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synthvid_send(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 = 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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synthvid_send(hdev, &msg);
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return 0;
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}
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/* Send updated screen area (dirty rectangle) location to host */
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static int synthvid_update(struct fb_info *info)
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{
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struct hv_device *hdev = device_to_hv_device(info->device);
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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_DIRT;
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msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) +
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sizeof(struct synthvid_dirt);
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msg.dirt.video_output = 0;
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msg.dirt.dirt_count = 1;
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msg.dirt.rect[0].x1 = 0;
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msg.dirt.rect[0].y1 = 0;
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msg.dirt.rect[0].x2 = info->var.xres;
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msg.dirt.rect[0].y2 = info->var.yres;
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synthvid_send(hdev, &msg);
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return 0;
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}
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/*
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* Actions on received messages from host:
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* Complete the wait event.
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* Or, reply with screen and cursor info.
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*/
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static void synthvid_recv_sub(struct hv_device *hdev)
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{
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struct fb_info *info = hv_get_drvdata(hdev);
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struct hvfb_par *par;
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struct synthvid_msg *msg;
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if (!info)
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return;
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par = info->par;
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msg = (struct synthvid_msg *)par->recv_buf;
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/* Complete the wait event */
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if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE ||
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msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) {
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memcpy(par->init_buf, msg, MAX_VMBUS_PKT_SIZE);
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complete(&par->wait);
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return;
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}
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/* Reply with screen and cursor info */
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if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) {
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if (par->fb_ready) {
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synthvid_send_ptr(hdev);
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synthvid_send_situ(hdev);
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}
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par->update = msg->feature_chg.is_dirt_needed;
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if (par->update)
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schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY);
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}
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}
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/* Receive callback for messages from the host */
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static void synthvid_receive(void *ctx)
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{
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struct hv_device *hdev = ctx;
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struct fb_info *info = hv_get_drvdata(hdev);
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struct hvfb_par *par;
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struct synthvid_msg *recv_buf;
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u32 bytes_recvd;
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u64 req_id;
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int ret;
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if (!info)
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return;
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par = info->par;
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recv_buf = (struct synthvid_msg *)par->recv_buf;
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do {
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ret = vmbus_recvpacket(hdev->channel, recv_buf,
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MAX_VMBUS_PKT_SIZE,
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&bytes_recvd, &req_id);
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if (bytes_recvd > 0 &&
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recv_buf->pipe_hdr.type == PIPE_MSG_DATA)
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synthvid_recv_sub(hdev);
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} while (bytes_recvd > 0 && ret == 0);
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}
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/* Check synthetic video protocol version with the host */
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static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver)
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{
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struct fb_info *info = hv_get_drvdata(hdev);
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struct hvfb_par *par = info->par;
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struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf;
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int ret = 0;
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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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synthvid_send(hdev, msg);
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t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT);
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if (!t) {
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pr_err("Time out on waiting version response\n");
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ret = -ETIMEDOUT;
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goto out;
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}
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if (!msg->ver_resp.is_accepted) {
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ret = -ENODEV;
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goto out;
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}
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par->synthvid_version = ver;
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out:
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return ret;
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}
|
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|
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/* Connect to VSP (Virtual Service Provider) on host */
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static int synthvid_connect_vsp(struct hv_device *hdev)
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{
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struct fb_info *info = hv_get_drvdata(hdev);
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struct hvfb_par *par = info->par;
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int ret;
|
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ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE,
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NULL, 0, synthvid_receive, hdev);
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if (ret) {
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pr_err("Unable to open vmbus channel\n");
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return ret;
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}
|
|
|
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/* Negotiate the protocol version with host */
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if (vmbus_proto_version == VERSION_WS2008 ||
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vmbus_proto_version == VERSION_WIN7)
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ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7);
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else
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ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8);
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|
|
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if (ret) {
|
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pr_err("Synthetic video device version not accepted\n");
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goto error;
|
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}
|
|
|
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if (par->synthvid_version == SYNTHVID_VERSION_WIN7)
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screen_depth = SYNTHVID_DEPTH_WIN7;
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else
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screen_depth = SYNTHVID_DEPTH_WIN8;
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|
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screen_fb_size = hdev->channel->offermsg.offer.
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mmio_megabytes * 1024 * 1024;
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return 0;
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error:
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vmbus_close(hdev->channel);
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return ret;
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}
|
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|
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/* Send VRAM and Situation messages to the host */
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static int synthvid_send_config(struct hv_device *hdev)
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{
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struct fb_info *info = hv_get_drvdata(hdev);
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struct hvfb_par *par = info->par;
|
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struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf;
|
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int ret = 0;
|
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unsigned long t;
|
|
|
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/* Send VRAM location */
|
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memset(msg, 0, sizeof(struct synthvid_msg));
|
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msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION;
|
|
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 = msg->vram.vram_gpa = info->fix.smem_start;
|
|
msg->vram.is_vram_gpa_specified = 1;
|
|
synthvid_send(hdev, msg);
|
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT);
|
|
if (!t) {
|
|
pr_err("Time out on waiting vram location ack\n");
|
|
ret = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
if (msg->vram_ack.user_ctx != info->fix.smem_start) {
|
|
pr_err("Unable to set VRAM location\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* Send pointer and situation update */
|
|
synthvid_send_ptr(hdev);
|
|
synthvid_send_situ(hdev);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Delayed work callback:
|
|
* It is called at HVFB_UPDATE_DELAY or longer time interval to process
|
|
* screen updates. It is re-scheduled if further update is necessary.
|
|
*/
|
|
static void hvfb_update_work(struct work_struct *w)
|
|
{
|
|
struct hvfb_par *par = container_of(w, struct hvfb_par, dwork.work);
|
|
struct fb_info *info = par->info;
|
|
|
|
if (par->fb_ready)
|
|
synthvid_update(info);
|
|
|
|
if (par->update)
|
|
schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY);
|
|
}
|
|
|
|
static int hvfb_on_panic(struct notifier_block *nb,
|
|
unsigned long e, void *p)
|
|
{
|
|
struct hvfb_par *par;
|
|
struct fb_info *info;
|
|
|
|
par = container_of(nb, struct hvfb_par, hvfb_panic_nb);
|
|
par->synchronous_fb = true;
|
|
info = par->info;
|
|
synthvid_update(info);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
/* Framebuffer operation handlers */
|
|
|
|
static int hvfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
|
{
|
|
if (var->xres < HVFB_WIDTH_MIN || var->yres < HVFB_HEIGHT_MIN ||
|
|
var->xres > screen_width || var->yres > screen_height ||
|
|
var->bits_per_pixel != screen_depth)
|
|
return -EINVAL;
|
|
|
|
var->xres_virtual = var->xres;
|
|
var->yres_virtual = var->yres;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_set_par(struct fb_info *info)
|
|
{
|
|
struct hv_device *hdev = device_to_hv_device(info->device);
|
|
|
|
return synthvid_send_situ(hdev);
|
|
}
|
|
|
|
|
|
static inline u32 chan_to_field(u32 chan, struct fb_bitfield *bf)
|
|
{
|
|
return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
|
|
}
|
|
|
|
static int hvfb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp, struct fb_info *info)
|
|
{
|
|
u32 *pal = info->pseudo_palette;
|
|
|
|
if (regno > 15)
|
|
return -EINVAL;
|
|
|
|
pal[regno] = chan_to_field(red, &info->var.red)
|
|
| chan_to_field(green, &info->var.green)
|
|
| chan_to_field(blue, &info->var.blue)
|
|
| chan_to_field(transp, &info->var.transp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hvfb_blank(int blank, struct fb_info *info)
|
|
{
|
|
return 1; /* get fb_blank to set the colormap to all black */
|
|
}
|
|
|
|
static void hvfb_cfb_fillrect(struct fb_info *p,
|
|
const struct fb_fillrect *rect)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_fillrect(p, rect);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p);
|
|
}
|
|
|
|
static void hvfb_cfb_copyarea(struct fb_info *p,
|
|
const struct fb_copyarea *area)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_copyarea(p, area);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p);
|
|
}
|
|
|
|
static void hvfb_cfb_imageblit(struct fb_info *p,
|
|
const struct fb_image *image)
|
|
{
|
|
struct hvfb_par *par = p->par;
|
|
|
|
cfb_imageblit(p, image);
|
|
if (par->synchronous_fb)
|
|
synthvid_update(p);
|
|
}
|
|
|
|
static struct fb_ops hvfb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_check_var = hvfb_check_var,
|
|
.fb_set_par = hvfb_set_par,
|
|
.fb_setcolreg = hvfb_setcolreg,
|
|
.fb_fillrect = hvfb_cfb_fillrect,
|
|
.fb_copyarea = hvfb_cfb_copyarea,
|
|
.fb_imageblit = hvfb_cfb_imageblit,
|
|
.fb_blank = hvfb_blank,
|
|
};
|
|
|
|
|
|
/* Get options from kernel paramenter "video=" */
|
|
static void hvfb_get_option(struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
char *opt = NULL, *p;
|
|
uint x = 0, y = 0;
|
|
|
|
if (fb_get_options(KBUILD_MODNAME, &opt) || !opt || !*opt)
|
|
return;
|
|
|
|
p = strsep(&opt, "x");
|
|
if (!*p || kstrtouint(p, 0, &x) ||
|
|
!opt || !*opt || kstrtouint(opt, 0, &y)) {
|
|
pr_err("Screen option is invalid: skipped\n");
|
|
return;
|
|
}
|
|
|
|
if (x < HVFB_WIDTH_MIN || y < HVFB_HEIGHT_MIN ||
|
|
(par->synthvid_version == SYNTHVID_VERSION_WIN8 &&
|
|
x * y * screen_depth / 8 > SYNTHVID_FB_SIZE_WIN8) ||
|
|
(par->synthvid_version == SYNTHVID_VERSION_WIN7 &&
|
|
(x > SYNTHVID_WIDTH_MAX_WIN7 || y > SYNTHVID_HEIGHT_MAX_WIN7))) {
|
|
pr_err("Screen resolution option is out of range: skipped\n");
|
|
return;
|
|
}
|
|
|
|
screen_width = x;
|
|
screen_height = y;
|
|
return;
|
|
}
|
|
|
|
|
|
/* Get framebuffer memory from Hyper-V video pci space */
|
|
static int hvfb_getmem(struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
struct pci_dev *pdev = NULL;
|
|
void __iomem *fb_virt;
|
|
int gen2vm = efi_enabled(EFI_BOOT);
|
|
int ret;
|
|
|
|
par->mem.name = KBUILD_MODNAME;
|
|
par->mem.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
|
|
if (gen2vm) {
|
|
ret = allocate_resource(&hyperv_mmio, &par->mem,
|
|
screen_fb_size,
|
|
0, -1,
|
|
screen_fb_size,
|
|
NULL, NULL);
|
|
if (ret != 0) {
|
|
pr_err("Unable to allocate framebuffer memory\n");
|
|
return -ENODEV;
|
|
}
|
|
} else {
|
|
pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT,
|
|
PCI_DEVICE_ID_HYPERV_VIDEO, NULL);
|
|
if (!pdev) {
|
|
pr_err("Unable to find PCI Hyper-V video\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) ||
|
|
pci_resource_len(pdev, 0) < screen_fb_size)
|
|
goto err1;
|
|
|
|
par->mem.end = pci_resource_end(pdev, 0);
|
|
par->mem.start = par->mem.end - screen_fb_size + 1;
|
|
ret = request_resource(&pdev->resource[0], &par->mem);
|
|
if (ret != 0) {
|
|
pr_err("Unable to request framebuffer memory\n");
|
|
goto err1;
|
|
}
|
|
}
|
|
|
|
fb_virt = ioremap(par->mem.start, screen_fb_size);
|
|
if (!fb_virt)
|
|
goto err2;
|
|
|
|
info->apertures = alloc_apertures(1);
|
|
if (!info->apertures)
|
|
goto err3;
|
|
|
|
if (gen2vm) {
|
|
info->apertures->ranges[0].base = screen_info.lfb_base;
|
|
info->apertures->ranges[0].size = screen_info.lfb_size;
|
|
remove_conflicting_framebuffers(info->apertures,
|
|
KBUILD_MODNAME, false);
|
|
} else {
|
|
info->apertures->ranges[0].base = pci_resource_start(pdev, 0);
|
|
info->apertures->ranges[0].size = pci_resource_len(pdev, 0);
|
|
}
|
|
|
|
info->fix.smem_start = par->mem.start;
|
|
info->fix.smem_len = screen_fb_size;
|
|
info->screen_base = fb_virt;
|
|
info->screen_size = screen_fb_size;
|
|
|
|
if (!gen2vm)
|
|
pci_dev_put(pdev);
|
|
|
|
return 0;
|
|
|
|
err3:
|
|
iounmap(fb_virt);
|
|
err2:
|
|
release_resource(&par->mem);
|
|
err1:
|
|
if (!gen2vm)
|
|
pci_dev_put(pdev);
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Release the framebuffer */
|
|
static void hvfb_putmem(struct fb_info *info)
|
|
{
|
|
struct hvfb_par *par = info->par;
|
|
|
|
iounmap(info->screen_base);
|
|
release_resource(&par->mem);
|
|
}
|
|
|
|
|
|
static int hvfb_probe(struct hv_device *hdev,
|
|
const struct hv_vmbus_device_id *dev_id)
|
|
{
|
|
struct fb_info *info;
|
|
struct hvfb_par *par;
|
|
int ret;
|
|
|
|
info = framebuffer_alloc(sizeof(struct hvfb_par), &hdev->device);
|
|
if (!info) {
|
|
pr_err("No memory for framebuffer info\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
par = info->par;
|
|
par->info = info;
|
|
par->fb_ready = false;
|
|
init_completion(&par->wait);
|
|
INIT_DELAYED_WORK(&par->dwork, hvfb_update_work);
|
|
|
|
/* Connect to VSP */
|
|
hv_set_drvdata(hdev, info);
|
|
ret = synthvid_connect_vsp(hdev);
|
|
if (ret) {
|
|
pr_err("Unable to connect to VSP\n");
|
|
goto error1;
|
|
}
|
|
|
|
ret = hvfb_getmem(info);
|
|
if (ret) {
|
|
pr_err("No memory for framebuffer\n");
|
|
goto error2;
|
|
}
|
|
|
|
hvfb_get_option(info);
|
|
pr_info("Screen resolution: %dx%d, Color depth: %d\n",
|
|
screen_width, screen_height, screen_depth);
|
|
|
|
|
|
/* Set up fb_info */
|
|
info->flags = FBINFO_DEFAULT;
|
|
|
|
info->var.xres_virtual = info->var.xres = screen_width;
|
|
info->var.yres_virtual = info->var.yres = screen_height;
|
|
info->var.bits_per_pixel = screen_depth;
|
|
|
|
if (info->var.bits_per_pixel == 16) {
|
|
info->var.red = (struct fb_bitfield){11, 5, 0};
|
|
info->var.green = (struct fb_bitfield){5, 6, 0};
|
|
info->var.blue = (struct fb_bitfield){0, 5, 0};
|
|
info->var.transp = (struct fb_bitfield){0, 0, 0};
|
|
} else {
|
|
info->var.red = (struct fb_bitfield){16, 8, 0};
|
|
info->var.green = (struct fb_bitfield){8, 8, 0};
|
|
info->var.blue = (struct fb_bitfield){0, 8, 0};
|
|
info->var.transp = (struct fb_bitfield){24, 8, 0};
|
|
}
|
|
|
|
info->var.activate = FB_ACTIVATE_NOW;
|
|
info->var.height = -1;
|
|
info->var.width = -1;
|
|
info->var.vmode = FB_VMODE_NONINTERLACED;
|
|
|
|
strcpy(info->fix.id, KBUILD_MODNAME);
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
|
info->fix.visual = FB_VISUAL_TRUECOLOR;
|
|
info->fix.line_length = screen_width * screen_depth / 8;
|
|
info->fix.accel = FB_ACCEL_NONE;
|
|
|
|
info->fbops = &hvfb_ops;
|
|
info->pseudo_palette = par->pseudo_palette;
|
|
|
|
/* Send config to host */
|
|
ret = synthvid_send_config(hdev);
|
|
if (ret)
|
|
goto error;
|
|
|
|
ret = register_framebuffer(info);
|
|
if (ret) {
|
|
pr_err("Unable to register framebuffer\n");
|
|
goto error;
|
|
}
|
|
|
|
par->fb_ready = true;
|
|
|
|
par->synchronous_fb = false;
|
|
par->hvfb_panic_nb.notifier_call = hvfb_on_panic;
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&par->hvfb_panic_nb);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
hvfb_putmem(info);
|
|
error2:
|
|
vmbus_close(hdev->channel);
|
|
error1:
|
|
cancel_delayed_work_sync(&par->dwork);
|
|
hv_set_drvdata(hdev, NULL);
|
|
framebuffer_release(info);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int hvfb_remove(struct hv_device *hdev)
|
|
{
|
|
struct fb_info *info = hv_get_drvdata(hdev);
|
|
struct hvfb_par *par = info->par;
|
|
|
|
atomic_notifier_chain_unregister(&panic_notifier_list,
|
|
&par->hvfb_panic_nb);
|
|
|
|
par->update = false;
|
|
par->fb_ready = false;
|
|
|
|
unregister_framebuffer(info);
|
|
cancel_delayed_work_sync(&par->dwork);
|
|
|
|
vmbus_close(hdev->channel);
|
|
hv_set_drvdata(hdev, NULL);
|
|
|
|
hvfb_putmem(info);
|
|
framebuffer_release(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct pci_device_id pci_stub_id_table[] = {
|
|
{
|
|
.vendor = PCI_VENDOR_ID_MICROSOFT,
|
|
.device = PCI_DEVICE_ID_HYPERV_VIDEO,
|
|
},
|
|
{ /* end of list */ }
|
|
};
|
|
|
|
static const struct hv_vmbus_device_id id_table[] = {
|
|
/* Synthetic Video Device GUID */
|
|
{HV_SYNTHVID_GUID},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, pci_stub_id_table);
|
|
MODULE_DEVICE_TABLE(vmbus, id_table);
|
|
|
|
static struct hv_driver hvfb_drv = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = id_table,
|
|
.probe = hvfb_probe,
|
|
.remove = hvfb_remove,
|
|
};
|
|
|
|
static int hvfb_pci_stub_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void hvfb_pci_stub_remove(struct pci_dev *pdev)
|
|
{
|
|
}
|
|
|
|
static struct pci_driver hvfb_pci_stub_driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = pci_stub_id_table,
|
|
.probe = hvfb_pci_stub_probe,
|
|
.remove = hvfb_pci_stub_remove,
|
|
};
|
|
|
|
static int __init hvfb_drv_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = vmbus_driver_register(&hvfb_drv);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
ret = pci_register_driver(&hvfb_pci_stub_driver);
|
|
if (ret != 0) {
|
|
vmbus_driver_unregister(&hvfb_drv);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit hvfb_drv_exit(void)
|
|
{
|
|
pci_unregister_driver(&hvfb_pci_stub_driver);
|
|
vmbus_driver_unregister(&hvfb_drv);
|
|
}
|
|
|
|
module_init(hvfb_drv_init);
|
|
module_exit(hvfb_drv_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Microsoft Hyper-V Synthetic Video Frame Buffer Driver");
|