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1434 lines
35 KiB
1434 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (c) 2012, Microsoft Corporation. |
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* |
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* Author: |
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* Haiyang Zhang <[email protected]> |
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*/ |
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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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* When a Windows 10 RS5+ host is used, the virtual machine screen |
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* resolution is obtained from the host. The "video=hyperv_fb" option is |
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* not needed, but still can be used to overwrite what the host specifies. |
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* The VM resolution on the host could be set by executing the powershell |
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* "set-vmvideo" command. For example |
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* set-vmvideo -vmname name -horizontalresolution:1920 \ |
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* -verticalresolution:1200 -resolutiontype single |
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* |
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* Gen 1 VMs also support direct using VM's physical memory for framebuffer. |
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* It could improve the efficiency and performance for framebuffer and VM. |
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* This requires to allocate contiguous physical memory from Linux kernel's |
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* CMA memory allocator. To enable this, supply a kernel parameter to give |
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* enough memory space to CMA allocator for framebuffer. For example: |
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* cma=130m |
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* This gives 130MB memory to CMA allocator that can be allocated to |
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* framebuffer. For reference, 8K resolution (7680x4320) takes about |
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* 127MB memory. |
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*/ |
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|
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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|
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/vmalloc.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/console.h> |
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|
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#include <linux/hyperv.h> |
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|
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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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|
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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_VERSION_WIN10 SYNTHVID_VERSION(3, 5) |
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|
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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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|
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#define SYNTHVID_DEPTH_WIN7 16 |
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#define SYNTHVID_DEPTH_WIN8 32 |
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|
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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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|
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#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) |
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|
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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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|
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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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|
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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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|
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SYNTHVID_MAX = 15 |
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}; |
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|
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#define SYNTHVID_EDID_BLOCK_SIZE 128 |
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#define SYNTHVID_MAX_RESOLUTION_COUNT 64 |
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|
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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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|
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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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|
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struct synthvid_version_req { |
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u32 version; |
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} __packed; |
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|
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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_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 |
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supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT]; |
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} __packed; |
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|
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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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|
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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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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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|
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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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#define HVFB_ONDEMAND_THROTTLE (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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bool update_saved; /* The value of 'update' before hibernation */ |
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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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/* If true, need to copy from deferred IO mem to framebuffer mem */ |
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bool need_docopy; |
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struct notifier_block hvfb_panic_nb; |
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/* Memory for deferred IO and frame buffer itself */ |
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unsigned char *dio_vp; |
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unsigned char *mmio_vp; |
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phys_addr_t mmio_pp; |
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|
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/* Dirty rectangle, protected by delayed_refresh_lock */ |
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int x1, y1, x2, y2; |
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bool delayed_refresh; |
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spinlock_t delayed_refresh_lock; |
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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_width_max = HVFB_WIDTH; |
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static uint screen_height_max = HVFB_HEIGHT; |
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static uint screen_depth; |
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static uint screen_fb_size; |
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static uint dio_fb_size; /* FB size for deferred IO */ |
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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 |
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synthvid_update(struct fb_info *info, int x1, int y1, int x2, int y2) |
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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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if (x2 == INT_MAX) |
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x2 = info->var.xres; |
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if (y2 == INT_MAX) |
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y2 = info->var.yres; |
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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 = (x1 > x2) ? 0 : x1; |
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msg.dirt.rect[0].y1 = (y1 > y2) ? 0 : y1; |
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msg.dirt.rect[0].x2 = |
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(x2 < x1 || x2 > info->var.xres) ? info->var.xres : x2; |
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msg.dirt.rect[0].y2 = |
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(y2 < y1 || y2 > info->var.yres) ? info->var.yres : y2; |
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synthvid_send(hdev, &msg); |
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return 0; |
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} |
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static void hvfb_docopy(struct hvfb_par *par, |
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unsigned long offset, |
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unsigned long size) |
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{ |
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if (!par || !par->mmio_vp || !par->dio_vp || !par->fb_ready || |
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size == 0 || offset >= dio_fb_size) |
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return; |
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|
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if (offset + size > dio_fb_size) |
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size = dio_fb_size - offset; |
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memcpy(par->mmio_vp + offset, par->dio_vp + offset, size); |
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} |
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|
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/* Deferred IO callback */ |
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static void synthvid_deferred_io(struct fb_info *p, |
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struct list_head *pagelist) |
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{ |
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struct hvfb_par *par = p->par; |
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struct page *page; |
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unsigned long start, end; |
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int y1, y2, miny, maxy; |
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|
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miny = INT_MAX; |
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maxy = 0; |
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|
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/* |
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* Merge dirty pages. It is possible that last page cross |
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* over the end of frame buffer row yres. This is taken care of |
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* in synthvid_update function by clamping the y2 |
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* value to yres. |
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*/ |
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list_for_each_entry(page, pagelist, lru) { |
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start = page->index << PAGE_SHIFT; |
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end = start + PAGE_SIZE - 1; |
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y1 = start / p->fix.line_length; |
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y2 = end / p->fix.line_length; |
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miny = min_t(int, miny, y1); |
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maxy = max_t(int, maxy, y2); |
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|
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/* Copy from dio space to mmio address */ |
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if (par->fb_ready && par->need_docopy) |
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hvfb_docopy(par, start, PAGE_SIZE); |
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} |
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|
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if (par->fb_ready && par->update) |
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synthvid_update(p, 0, miny, p->var.xres, maxy + 1); |
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} |
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|
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static struct fb_deferred_io synthvid_defio = { |
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.delay = HZ / 20, |
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.deferred_io = synthvid_deferred_io, |
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}; |
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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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|
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if (!info) |
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return; |
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|
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par = info->par; |
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msg = (struct synthvid_msg *)par->recv_buf; |
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|
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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_RESOLUTION_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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|
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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 if the ver1 version is equal or greater than ver2 */ |
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static inline bool synthvid_ver_ge(u32 ver1, u32 ver2) |
|
{ |
|
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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/* Check synthetic video protocol version with the host */ |
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static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver) |
|
{ |
|
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; |
|
int ret = 0; |
|
unsigned long t; |
|
|
|
memset(msg, 0, sizeof(struct synthvid_msg)); |
|
msg->vid_hdr.type = SYNTHVID_VERSION_REQUEST; |
|
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + |
|
sizeof(struct synthvid_version_req); |
|
msg->ver_req.version = ver; |
|
synthvid_send(hdev, msg); |
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); |
|
if (!t) { |
|
pr_err("Time out on waiting version response\n"); |
|
ret = -ETIMEDOUT; |
|
goto out; |
|
} |
|
if (!msg->ver_resp.is_accepted) { |
|
ret = -ENODEV; |
|
goto out; |
|
} |
|
|
|
par->synthvid_version = ver; |
|
pr_info("Synthvid Version major %d, minor %d\n", |
|
SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver)); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
/* Get current resolution from the host */ |
|
static int synthvid_get_supported_resolution(struct hv_device *hdev) |
|
{ |
|
struct fb_info *info = hv_get_drvdata(hdev); |
|
struct hvfb_par *par = info->par; |
|
struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf; |
|
int ret = 0; |
|
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; |
|
synthvid_send(hdev, msg); |
|
|
|
t = wait_for_completion_timeout(&par->wait, VSP_TIMEOUT); |
|
if (!t) { |
|
pr_err("Time out on waiting resolution response\n"); |
|
ret = -ETIMEDOUT; |
|
goto out; |
|
} |
|
|
|
if (msg->resolution_resp.resolution_count == 0) { |
|
pr_err("No supported resolutions\n"); |
|
ret = -ENODEV; |
|
goto out; |
|
} |
|
|
|
index = msg->resolution_resp.default_resolution_index; |
|
if (index >= msg->resolution_resp.resolution_count) { |
|
pr_err("Invalid resolution index: %d\n", index); |
|
ret = -ENODEV; |
|
goto out; |
|
} |
|
|
|
for (i = 0; i < msg->resolution_resp.resolution_count; i++) { |
|
screen_width_max = max_t(unsigned int, screen_width_max, |
|
msg->resolution_resp.supported_resolution[i].width); |
|
screen_height_max = max_t(unsigned int, screen_height_max, |
|
msg->resolution_resp.supported_resolution[i].height); |
|
} |
|
|
|
screen_width = |
|
msg->resolution_resp.supported_resolution[index].width; |
|
screen_height = |
|
msg->resolution_resp.supported_resolution[index].height; |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
/* Connect to VSP (Virtual Service Provider) on host */ |
|
static int synthvid_connect_vsp(struct hv_device *hdev) |
|
{ |
|
struct fb_info *info = hv_get_drvdata(hdev); |
|
struct hvfb_par *par = info->par; |
|
int ret; |
|
|
|
ret = vmbus_open(hdev->channel, RING_BUFSIZE, RING_BUFSIZE, |
|
NULL, 0, synthvid_receive, hdev); |
|
if (ret) { |
|
pr_err("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 = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN10); |
|
if (!ret) |
|
break; |
|
fallthrough; |
|
case VERSION_WIN8: |
|
case VERSION_WIN8_1: |
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); |
|
if (!ret) |
|
break; |
|
fallthrough; |
|
case VERSION_WS2008: |
|
case VERSION_WIN7: |
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7); |
|
break; |
|
default: |
|
ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN10); |
|
break; |
|
} |
|
|
|
if (ret) { |
|
pr_err("Synthetic video device version not accepted\n"); |
|
goto error; |
|
} |
|
|
|
if (par->synthvid_version == SYNTHVID_VERSION_WIN7) |
|
screen_depth = SYNTHVID_DEPTH_WIN7; |
|
else |
|
screen_depth = SYNTHVID_DEPTH_WIN8; |
|
|
|
if (synthvid_ver_ge(par->synthvid_version, SYNTHVID_VERSION_WIN10)) { |
|
ret = synthvid_get_supported_resolution(hdev); |
|
if (ret) |
|
pr_info("Failed to get supported resolution from host, use default\n"); |
|
} |
|
|
|
screen_fb_size = hdev->channel->offermsg.offer. |
|
mmio_megabytes * 1024 * 1024; |
|
|
|
return 0; |
|
|
|
error: |
|
vmbus_close(hdev->channel); |
|
return ret; |
|
} |
|
|
|
/* Send VRAM and Situation messages to the host */ |
|
static int synthvid_send_config(struct hv_device *hdev) |
|
{ |
|
struct fb_info *info = hv_get_drvdata(hdev); |
|
struct hvfb_par *par = info->par; |
|
struct synthvid_msg *msg = (struct synthvid_msg *)par->init_buf; |
|
int ret = 0; |
|
unsigned long t; |
|
|
|
/* Send VRAM location */ |
|
memset(msg, 0, sizeof(struct synthvid_msg)); |
|
msg->vid_hdr.type = SYNTHVID_VRAM_LOCATION; |
|
msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + |
|
sizeof(struct synthvid_vram_location); |
|
msg->vram.user_ctx = msg->vram.vram_gpa = par->mmio_pp; |
|
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 != par->mmio_pp) { |
|
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 scheduled to call whenever update request is received and it has |
|
* not been called in last HVFB_ONDEMAND_THROTTLE time interval. |
|
*/ |
|
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; |
|
unsigned long flags; |
|
int x1, x2, y1, y2; |
|
int j; |
|
|
|
spin_lock_irqsave(&par->delayed_refresh_lock, flags); |
|
/* Reset the request flag */ |
|
par->delayed_refresh = false; |
|
|
|
/* Store the dirty rectangle to local variables */ |
|
x1 = par->x1; |
|
x2 = par->x2; |
|
y1 = par->y1; |
|
y2 = par->y2; |
|
|
|
/* Clear dirty rectangle */ |
|
par->x1 = par->y1 = INT_MAX; |
|
par->x2 = par->y2 = 0; |
|
|
|
spin_unlock_irqrestore(&par->delayed_refresh_lock, flags); |
|
|
|
if (x1 > info->var.xres || x2 > info->var.xres || |
|
y1 > info->var.yres || y2 > info->var.yres || x2 <= x1) |
|
return; |
|
|
|
/* Copy the dirty rectangle to frame buffer memory */ |
|
if (par->need_docopy) |
|
for (j = y1; j < y2; j++) |
|
hvfb_docopy(par, |
|
j * info->fix.line_length + |
|
(x1 * screen_depth / 8), |
|
(x2 - x1) * screen_depth / 8); |
|
|
|
/* Refresh */ |
|
if (par->fb_ready && par->update) |
|
synthvid_update(info, x1, y1, x2, y2); |
|
} |
|
|
|
/* |
|
* Control the on-demand refresh frequency. It schedules a delayed |
|
* screen update if it has not yet. |
|
*/ |
|
static void hvfb_ondemand_refresh_throttle(struct hvfb_par *par, |
|
int x1, int y1, int w, int h) |
|
{ |
|
unsigned long flags; |
|
int x2 = x1 + w; |
|
int y2 = y1 + h; |
|
|
|
spin_lock_irqsave(&par->delayed_refresh_lock, flags); |
|
|
|
/* Merge dirty rectangle */ |
|
par->x1 = min_t(int, par->x1, x1); |
|
par->y1 = min_t(int, par->y1, y1); |
|
par->x2 = max_t(int, par->x2, x2); |
|
par->y2 = max_t(int, par->y2, y2); |
|
|
|
/* Schedule a delayed screen update if not yet */ |
|
if (par->delayed_refresh == false) { |
|
schedule_delayed_work(&par->dwork, |
|
HVFB_ONDEMAND_THROTTLE); |
|
par->delayed_refresh = true; |
|
} |
|
|
|
spin_unlock_irqrestore(&par->delayed_refresh_lock, flags); |
|
} |
|
|
|
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; |
|
if (par->need_docopy) |
|
hvfb_docopy(par, 0, dio_fb_size); |
|
synthvid_update(info, 0, 0, INT_MAX, INT_MAX); |
|
|
|
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, 0, 0, INT_MAX, INT_MAX); |
|
else |
|
hvfb_ondemand_refresh_throttle(par, rect->dx, rect->dy, |
|
rect->width, rect->height); |
|
} |
|
|
|
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, 0, 0, INT_MAX, INT_MAX); |
|
else |
|
hvfb_ondemand_refresh_throttle(par, area->dx, area->dy, |
|
area->width, area->height); |
|
} |
|
|
|
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, 0, 0, INT_MAX, INT_MAX); |
|
else |
|
hvfb_ondemand_refresh_throttle(par, image->dx, image->dy, |
|
image->width, image->height); |
|
} |
|
|
|
static const 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 || |
|
(synthvid_ver_ge(par->synthvid_version, SYNTHVID_VERSION_WIN10) && |
|
(x > screen_width_max || y > screen_height_max)) || |
|
(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; |
|
} |
|
|
|
/* |
|
* Allocate enough contiguous physical memory. |
|
* Return physical address if succeeded or -1 if failed. |
|
*/ |
|
static phys_addr_t hvfb_get_phymem(struct hv_device *hdev, |
|
unsigned int request_size) |
|
{ |
|
struct page *page = NULL; |
|
dma_addr_t dma_handle; |
|
void *vmem; |
|
phys_addr_t paddr = 0; |
|
unsigned int order = get_order(request_size); |
|
|
|
if (request_size == 0) |
|
return -1; |
|
|
|
if (order < MAX_ORDER) { |
|
/* Call alloc_pages if the size is less than 2^MAX_ORDER */ |
|
page = alloc_pages(GFP_KERNEL | __GFP_ZERO, order); |
|
if (!page) |
|
return -1; |
|
|
|
paddr = (page_to_pfn(page) << PAGE_SHIFT); |
|
} else { |
|
/* Allocate from CMA */ |
|
hdev->device.coherent_dma_mask = DMA_BIT_MASK(64); |
|
|
|
vmem = dma_alloc_coherent(&hdev->device, |
|
round_up(request_size, PAGE_SIZE), |
|
&dma_handle, |
|
GFP_KERNEL | __GFP_NOWARN); |
|
|
|
if (!vmem) |
|
return -1; |
|
|
|
paddr = virt_to_phys(vmem); |
|
} |
|
|
|
return paddr; |
|
} |
|
|
|
/* Release contiguous physical memory */ |
|
static void hvfb_release_phymem(struct hv_device *hdev, |
|
phys_addr_t paddr, unsigned int size) |
|
{ |
|
unsigned int order = get_order(size); |
|
|
|
if (order < MAX_ORDER) |
|
__free_pages(pfn_to_page(paddr >> PAGE_SHIFT), order); |
|
else |
|
dma_free_coherent(&hdev->device, |
|
round_up(size, PAGE_SIZE), |
|
phys_to_virt(paddr), |
|
paddr); |
|
} |
|
|
|
|
|
/* Get framebuffer memory from Hyper-V video pci space */ |
|
static int hvfb_getmem(struct hv_device *hdev, 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); |
|
resource_size_t pot_start, pot_end; |
|
phys_addr_t paddr; |
|
int ret; |
|
|
|
info->apertures = alloc_apertures(1); |
|
if (!info->apertures) |
|
return -ENOMEM; |
|
|
|
if (!gen2vm) { |
|
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; |
|
} |
|
|
|
info->apertures->ranges[0].base = pci_resource_start(pdev, 0); |
|
info->apertures->ranges[0].size = pci_resource_len(pdev, 0); |
|
|
|
/* |
|
* For Gen 1 VM, we can directly use the contiguous memory |
|
* from VM. If we succeed, deferred IO happens directly |
|
* on this allocated framebuffer memory, avoiding extra |
|
* memory copy. |
|
*/ |
|
paddr = hvfb_get_phymem(hdev, screen_fb_size); |
|
if (paddr != (phys_addr_t) -1) { |
|
par->mmio_pp = paddr; |
|
par->mmio_vp = par->dio_vp = __va(paddr); |
|
|
|
info->fix.smem_start = paddr; |
|
info->fix.smem_len = screen_fb_size; |
|
info->screen_base = par->mmio_vp; |
|
info->screen_size = screen_fb_size; |
|
|
|
par->need_docopy = false; |
|
goto getmem_done; |
|
} |
|
pr_info("Unable to allocate enough contiguous physical memory on Gen 1 VM. Using MMIO instead.\n"); |
|
} else { |
|
info->apertures->ranges[0].base = screen_info.lfb_base; |
|
info->apertures->ranges[0].size = screen_info.lfb_size; |
|
} |
|
|
|
/* |
|
* Cannot use the contiguous physical memory. |
|
* Allocate mmio space for framebuffer. |
|
*/ |
|
dio_fb_size = |
|
screen_width * screen_height * screen_depth / 8; |
|
|
|
if (gen2vm) { |
|
pot_start = 0; |
|
pot_end = -1; |
|
} else { |
|
if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || |
|
pci_resource_len(pdev, 0) < screen_fb_size) { |
|
pr_err("Resource not available or (0x%lx < 0x%lx)\n", |
|
(unsigned long) pci_resource_len(pdev, 0), |
|
(unsigned long) screen_fb_size); |
|
goto err1; |
|
} |
|
|
|
pot_end = pci_resource_end(pdev, 0); |
|
pot_start = pot_end - screen_fb_size + 1; |
|
} |
|
|
|
ret = vmbus_allocate_mmio(&par->mem, hdev, pot_start, pot_end, |
|
screen_fb_size, 0x100000, true); |
|
if (ret != 0) { |
|
pr_err("Unable to allocate framebuffer memory\n"); |
|
goto err1; |
|
} |
|
|
|
/* |
|
* Map the VRAM cacheable for performance. This is also required for |
|
* VM Connect to display properly for ARM64 Linux VM, as the host also |
|
* maps the VRAM cacheable. |
|
*/ |
|
fb_virt = ioremap_cache(par->mem->start, screen_fb_size); |
|
if (!fb_virt) |
|
goto err2; |
|
|
|
/* Allocate memory for deferred IO */ |
|
par->dio_vp = vzalloc(round_up(dio_fb_size, PAGE_SIZE)); |
|
if (par->dio_vp == NULL) |
|
goto err3; |
|
|
|
/* Physical address of FB device */ |
|
par->mmio_pp = par->mem->start; |
|
/* Virtual address of FB device */ |
|
par->mmio_vp = (unsigned char *) fb_virt; |
|
|
|
info->fix.smem_start = par->mem->start; |
|
info->fix.smem_len = dio_fb_size; |
|
info->screen_base = par->dio_vp; |
|
info->screen_size = dio_fb_size; |
|
|
|
getmem_done: |
|
remove_conflicting_framebuffers(info->apertures, |
|
KBUILD_MODNAME, false); |
|
|
|
if (gen2vm) { |
|
/* framebuffer is reallocated, clear screen_info to avoid misuse from kexec */ |
|
screen_info.lfb_size = 0; |
|
screen_info.lfb_base = 0; |
|
screen_info.orig_video_isVGA = 0; |
|
} else { |
|
pci_dev_put(pdev); |
|
} |
|
|
|
return 0; |
|
|
|
err3: |
|
iounmap(fb_virt); |
|
err2: |
|
vmbus_free_mmio(par->mem->start, screen_fb_size); |
|
par->mem = NULL; |
|
err1: |
|
if (!gen2vm) |
|
pci_dev_put(pdev); |
|
|
|
return -ENOMEM; |
|
} |
|
|
|
/* Release the framebuffer */ |
|
static void hvfb_putmem(struct hv_device *hdev, struct fb_info *info) |
|
{ |
|
struct hvfb_par *par = info->par; |
|
|
|
if (par->need_docopy) { |
|
vfree(par->dio_vp); |
|
iounmap(info->screen_base); |
|
vmbus_free_mmio(par->mem->start, screen_fb_size); |
|
} else { |
|
hvfb_release_phymem(hdev, info->fix.smem_start, |
|
screen_fb_size); |
|
} |
|
|
|
par->mem = NULL; |
|
} |
|
|
|
|
|
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) |
|
return -ENOMEM; |
|
|
|
par = info->par; |
|
par->info = info; |
|
par->fb_ready = false; |
|
par->need_docopy = true; |
|
init_completion(&par->wait); |
|
INIT_DELAYED_WORK(&par->dwork, hvfb_update_work); |
|
|
|
par->delayed_refresh = false; |
|
spin_lock_init(&par->delayed_refresh_lock); |
|
par->x1 = par->y1 = INT_MAX; |
|
par->x2 = par->y2 = 0; |
|
|
|
/* 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; |
|
} |
|
|
|
hvfb_get_option(info); |
|
pr_info("Screen resolution: %dx%d, Color depth: %d\n", |
|
screen_width, screen_height, screen_depth); |
|
|
|
ret = hvfb_getmem(hdev, info); |
|
if (ret) { |
|
pr_err("No memory for framebuffer\n"); |
|
goto error2; |
|
} |
|
|
|
/* 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; |
|
|
|
/* Initialize deferred IO */ |
|
info->fbdefio = &synthvid_defio; |
|
fb_deferred_io_init(info); |
|
|
|
/* 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: |
|
fb_deferred_io_cleanup(info); |
|
hvfb_putmem(hdev, 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; |
|
|
|
fb_deferred_io_cleanup(info); |
|
|
|
unregister_framebuffer(info); |
|
cancel_delayed_work_sync(&par->dwork); |
|
|
|
vmbus_close(hdev->channel); |
|
hv_set_drvdata(hdev, NULL); |
|
|
|
hvfb_putmem(hdev, info); |
|
framebuffer_release(info); |
|
|
|
return 0; |
|
} |
|
|
|
static int hvfb_suspend(struct hv_device *hdev) |
|
{ |
|
struct fb_info *info = hv_get_drvdata(hdev); |
|
struct hvfb_par *par = info->par; |
|
|
|
console_lock(); |
|
|
|
/* 1 means do suspend */ |
|
fb_set_suspend(info, 1); |
|
|
|
cancel_delayed_work_sync(&par->dwork); |
|
cancel_delayed_work_sync(&info->deferred_work); |
|
|
|
par->update_saved = par->update; |
|
par->update = false; |
|
par->fb_ready = false; |
|
|
|
vmbus_close(hdev->channel); |
|
|
|
console_unlock(); |
|
|
|
return 0; |
|
} |
|
|
|
static int hvfb_resume(struct hv_device *hdev) |
|
{ |
|
struct fb_info *info = hv_get_drvdata(hdev); |
|
struct hvfb_par *par = info->par; |
|
int ret; |
|
|
|
console_lock(); |
|
|
|
ret = synthvid_connect_vsp(hdev); |
|
if (ret != 0) |
|
goto out; |
|
|
|
ret = synthvid_send_config(hdev); |
|
if (ret != 0) { |
|
vmbus_close(hdev->channel); |
|
goto out; |
|
} |
|
|
|
par->fb_ready = true; |
|
par->update = par->update_saved; |
|
|
|
schedule_delayed_work(&info->deferred_work, info->fbdefio->delay); |
|
schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); |
|
|
|
/* 0 means do resume */ |
|
fb_set_suspend(info, 0); |
|
|
|
out: |
|
console_unlock(); |
|
|
|
return ret; |
|
} |
|
|
|
|
|
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, |
|
.suspend = hvfb_suspend, |
|
.resume = hvfb_resume, |
|
.driver = { |
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS, |
|
}, |
|
}; |
|
|
|
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, |
|
.driver = { |
|
.probe_type = PROBE_PREFER_ASYNCHRONOUS, |
|
} |
|
}; |
|
|
|
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");
|
|
|