/* * Copyright (c) 2012, Microsoft Corporation. * * Author: * Haiyang Zhang <haiyangz@microsoft.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. */ /* * Hyper-V Synthetic Video Frame Buffer Driver * * This is the driver for the Hyper-V Synthetic Video, which supports * screen resolution up to Full HD 1920x1080 with 32 bit color on Windows * Server 2012, and 1600x1200 with 16 bit color on Windows Server 2008 R2 * or earlier. * * It also solves the double mouse cursor issue of the emulated video mode. * * The default screen resolution is 1152x864, which may be changed by a * kernel parameter: * video=hyperv_fb:<width>x<height> * For example: video=hyperv_fb:1280x1024 * * Portrait orientation is also supported: * For example: video=hyperv_fb:864x1152 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/completion.h>#include <linux/fb.h>#include <linux/pci.h>#include <linux/efi.h> #include <linux/hyperv.h> /* Hyper-V Synthetic Video Protocol definitions and structures */#define MAX_VMBUS_PKT_SIZE 0x4000 #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))#define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)#define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) #define SYNTHVID_DEPTH_WIN7 16#define SYNTHVID_DEPTH_WIN8 32 #define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)#define SYNTHVID_WIDTH_MAX_WIN7 1600#define SYNTHVID_HEIGHT_MAX_WIN7 1200 #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) #define PCI_VENDOR_ID_MICROSOFT 0x1414#define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353 enum pipe_msg_type { PIPE_MSG_INVALID, PIPE_MSG_DATA, PIPE_MSG_MAX}; struct pipe_msg_hdr { u32 type; u32 size; /* size of message after this field */} __packed; enum synthvid_msg_type { SYNTHVID_ERROR = 0, SYNTHVID_VERSION_REQUEST = 1, SYNTHVID_VERSION_RESPONSE = 2, SYNTHVID_VRAM_LOCATION = 3, SYNTHVID_VRAM_LOCATION_ACK = 4, SYNTHVID_SITUATION_UPDATE = 5, SYNTHVID_SITUATION_UPDATE_ACK = 6, SYNTHVID_POINTER_POSITION = 7, SYNTHVID_POINTER_SHAPE = 8, SYNTHVID_FEATURE_CHANGE = 9, SYNTHVID_DIRT = 10, SYNTHVID_MAX = 11}; struct synthvid_msg_hdr { u32 type; u32 size; /* size of this header + payload after this field*/} __packed; struct synthvid_version_req { u32 version;} __packed; struct synthvid_version_resp { u32 version; u8 is_accepted; u8 max_video_outputs;} __packed; struct synthvid_vram_location { u64 user_ctx; u8 is_vram_gpa_specified; u64 vram_gpa;} __packed; struct synthvid_vram_location_ack { u64 user_ctx;} __packed; struct video_output_situation { u8 active; u32 vram_offset; u8 depth_bits; u32 width_pixels; u32 height_pixels; u32 pitch_bytes;} __packed; struct synthvid_situation_update { u64 user_ctx; u8 video_output_count; struct video_output_situation video_output[1];} __packed; struct synthvid_situation_update_ack { u64 user_ctx;} __packed; struct synthvid_pointer_position { u8 is_visible; u8 video_output; s32 image_x; s32 image_y;} __packed; #define CURSOR_MAX_X 96#define CURSOR_MAX_Y 96#define CURSOR_ARGB_PIXEL_SIZE 4#define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE)#define CURSOR_COMPLETE (-1) struct synthvid_pointer_shape { u8 part_idx; u8 is_argb; u32 width; /* CURSOR_MAX_X at most */ u32 height; /* CURSOR_MAX_Y at most */ u32 hot_x; /* hotspot relative to upper-left of pointer image */ u32 hot_y; u8 data[4];} __packed; struct synthvid_feature_change { u8 is_dirt_needed; u8 is_ptr_pos_needed; u8 is_ptr_shape_needed; u8 is_situ_needed;} __packed; struct rect { s32 x1, y1; /* top left corner */ s32 x2, y2; /* bottom right corner, exclusive */} __packed; struct synthvid_dirt { u8 video_output; u8 dirt_count; struct rect rect[1];} __packed; struct synthvid_msg { struct pipe_msg_hdr pipe_hdr; struct synthvid_msg_hdr vid_hdr; union { struct synthvid_version_req ver_req; struct synthvid_version_resp ver_resp; struct synthvid_vram_location vram; struct synthvid_vram_location_ack vram_ack; struct synthvid_situation_update situ; struct synthvid_situation_update_ack situ_ack; struct synthvid_pointer_position ptr_pos; struct synthvid_pointer_shape ptr_shape; struct synthvid_feature_change feature_chg; struct synthvid_dirt dirt; };} __packed; /* FB driver definitions and structures */#define HVFB_WIDTH 1152 /* default screen width */#define HVFB_HEIGHT 864 /* default screen height */#define HVFB_WIDTH_MIN 640#define HVFB_HEIGHT_MIN 480 #define RING_BUFSIZE (256 * 1024)#define VSP_TIMEOUT (10 * HZ)#define HVFB_UPDATE_DELAY (HZ / 20) struct hvfb_par { struct fb_info *info; struct resource mem; bool fb_ready; /* fb device is ready */ struct completion wait; u32 synthvid_version; struct delayed_work dwork; bool update; u32 pseudo_palette[16]; u8 init_buf[MAX_VMBUS_PKT_SIZE]; u8 recv_buf[MAX_VMBUS_PKT_SIZE]; /* If true, the VSC notifies the VSP on every framebuffer change */ bool synchronous_fb; struct notifier_block hvfb_panic_nb;}; static uint screen_width = HVFB_WIDTH;static uint screen_height = HVFB_HEIGHT;static uint screen_depth;static uint screen_fb_size; /* Send message to Hyper-V host */static inline int synthvid_send(struct hv_device *hdev, struct synthvid_msg *msg){ static atomic64_t request_id = ATOMIC64_INIT(0); int ret; msg->pipe_hdr.type = PIPE_MSG_DATA; msg->pipe_hdr.size = msg->vid_hdr.size; ret = vmbus_sendpacket(hdev->channel, msg, msg->vid_hdr.size + sizeof(struct pipe_msg_hdr), atomic64_inc_return(&request_id), VM_PKT_DATA_INBAND, 0); if (ret) pr_err("Unable to send packet via vmbus\n"); return ret;} /* Send screen resolution info to host */static int synthvid_send_situ(struct hv_device *hdev){ struct fb_info *info = hv_get_drvdata(hdev); struct synthvid_msg msg; if (!info) return -ENODEV; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_situation_update); msg.situ.user_ctx = 0; msg.situ.video_output_count = 1; msg.situ.video_output[0].active = 1; msg.situ.video_output[0].vram_offset = 0; msg.situ.video_output[0].depth_bits = info->var.bits_per_pixel; msg.situ.video_output[0].width_pixels = info->var.xres; msg.situ.video_output[0].height_pixels = info->var.yres; msg.situ.video_output[0].pitch_bytes = info->fix.line_length; synthvid_send(hdev, &msg); return 0;} /* Send mouse pointer info to host */static int synthvid_send_ptr(struct hv_device *hdev){ struct synthvid_msg msg; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_POINTER_POSITION; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_pointer_position); msg.ptr_pos.is_visible = 1; msg.ptr_pos.video_output = 0; msg.ptr_pos.image_x = 0; msg.ptr_pos.image_y = 0; synthvid_send(hdev, &msg); memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_pointer_shape); msg.ptr_shape.part_idx = CURSOR_COMPLETE; msg.ptr_shape.is_argb = 1; msg.ptr_shape.width = 1; msg.ptr_shape.height = 1; msg.ptr_shape.hot_x = 0; msg.ptr_shape.hot_y = 0; msg.ptr_shape.data[0] = 0; msg.ptr_shape.data[1] = 1; msg.ptr_shape.data[2] = 1; msg.ptr_shape.data[3] = 1; synthvid_send(hdev, &msg); return 0;} /* Send updated screen area (dirty rectangle) location to host */static int synthvid_update(struct fb_info *info){ struct hv_device *hdev = device_to_hv_device(info->device); struct synthvid_msg msg; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_DIRT; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_dirt); msg.dirt.video_output = 0; msg.dirt.dirt_count = 1; msg.dirt.rect[0].x1 = 0; msg.dirt.rect[0].y1 = 0; msg.dirt.rect[0].x2 = info->var.xres; msg.dirt.rect[0].y2 = info->var.yres; synthvid_send(hdev, &msg); return 0;} /* * Actions on received messages from host: * Complete the wait event. * Or, reply with screen and cursor info. */static void synthvid_recv_sub(struct hv_device *hdev){ struct fb_info *info = hv_get_drvdata(hdev); struct hvfb_par *par; struct synthvid_msg *msg; if (!info) return; par = info->par; msg = (struct synthvid_msg *)par->recv_buf; /* Complete the wait event */ if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE || msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) { memcpy(par->init_buf, msg, MAX_VMBUS_PKT_SIZE); complete(&par->wait); return; } /* Reply with screen and cursor info */ if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { if (par->fb_ready) { synthvid_send_ptr(hdev); synthvid_send_situ(hdev); } par->update = msg->feature_chg.is_dirt_needed; if (par->update) schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); }} /* Receive callback for messages from the host */static void synthvid_receive(void *ctx){ struct hv_device *hdev = ctx; struct fb_info *info = hv_get_drvdata(hdev); struct hvfb_par *par; struct synthvid_msg *recv_buf; u32 bytes_recvd; u64 req_id; int ret; if (!info) return; par = info->par; recv_buf = (struct synthvid_msg *)par->recv_buf; do { ret = vmbus_recvpacket(hdev->channel, recv_buf, MAX_VMBUS_PKT_SIZE, &bytes_recvd, &req_id); if (bytes_recvd > 0 && recv_buf->pipe_hdr.type == PIPE_MSG_DATA) synthvid_recv_sub(hdev); } while (bytes_recvd > 0 && ret == 0);} /* Check synthetic video protocol version with the host */static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver){ 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 t, ret = 0; 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; 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 */ if (vmbus_proto_version == VERSION_WS2008 || vmbus_proto_version == VERSION_WIN7) ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7); else ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); 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; 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 t, ret = 0; /* 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 = info->fix.smem_start; msg->vram.is_vram_gpa_specified = 1; synthvid_send(hdev, msg);Lines 1–500 of 963. 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/* * Copyright (c) 2012, Microsoft Corporation. * * Author: * Haiyang Zhang <haiyangz@microsoft.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. */ /* * Hyper-V Synthetic Video Frame Buffer Driver * * This is the driver for the Hyper-V Synthetic Video, which supports * screen resolution up to Full HD 1920x1080 with 32 bit color on Windows * Server 2012, and 1600x1200 with 16 bit color on Windows Server 2008 R2 * or earlier. * * It also solves the double mouse cursor issue of the emulated video mode. * * The default screen resolution is 1152x864, which may be changed by a * kernel parameter: * video=hyperv_fb:<width>x<height> * For example: video=hyperv_fb:1280x1024 * * Portrait orientation is also supported: * For example: video=hyperv_fb:864x1152 */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/completion.h> #include <linux/fb.h> #include <linux/pci.h> #include <linux/efi.h> #include <linux/hyperv.h> /* Hyper-V Synthetic Video Protocol definitions and structures */ #define MAX_VMBUS_PKT_SIZE 0x4000 #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major)) #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) #define SYNTHVID_DEPTH_WIN7 16 #define SYNTHVID_DEPTH_WIN8 32 #define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024) #define SYNTHVID_WIDTH_MAX_WIN7 1600 #define SYNTHVID_HEIGHT_MAX_WIN7 1200 #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) #define PCI_VENDOR_ID_MICROSOFT 0x1414 #define PCI_DEVICE_ID_HYPERV_VIDEO 0x5353 enum pipe_msg_type { PIPE_MSG_INVALID, PIPE_MSG_DATA, PIPE_MSG_MAX }; struct pipe_msg_hdr { u32 type; u32 size; /* size of message after this field */ } __packed; enum synthvid_msg_type { SYNTHVID_ERROR = 0, SYNTHVID_VERSION_REQUEST = 1, SYNTHVID_VERSION_RESPONSE = 2, SYNTHVID_VRAM_LOCATION = 3, SYNTHVID_VRAM_LOCATION_ACK = 4, SYNTHVID_SITUATION_UPDATE = 5, SYNTHVID_SITUATION_UPDATE_ACK = 6, SYNTHVID_POINTER_POSITION = 7, SYNTHVID_POINTER_SHAPE = 8, SYNTHVID_FEATURE_CHANGE = 9, SYNTHVID_DIRT = 10, SYNTHVID_MAX = 11 }; struct synthvid_msg_hdr { u32 type; u32 size; /* size of this header + payload after this field*/ } __packed; struct synthvid_version_req { u32 version; } __packed; struct synthvid_version_resp { u32 version; u8 is_accepted; u8 max_video_outputs; } __packed; struct synthvid_vram_location { u64 user_ctx; u8 is_vram_gpa_specified; u64 vram_gpa; } __packed; struct synthvid_vram_location_ack { u64 user_ctx; } __packed; struct video_output_situation { u8 active; u32 vram_offset; u8 depth_bits; u32 width_pixels; u32 height_pixels; u32 pitch_bytes; } __packed; struct synthvid_situation_update { u64 user_ctx; u8 video_output_count; struct video_output_situation video_output[1]; } __packed; struct synthvid_situation_update_ack { u64 user_ctx; } __packed; struct synthvid_pointer_position { u8 is_visible; u8 video_output; s32 image_x; s32 image_y; } __packed; #define CURSOR_MAX_X 96 #define CURSOR_MAX_Y 96 #define CURSOR_ARGB_PIXEL_SIZE 4 #define CURSOR_MAX_SIZE (CURSOR_MAX_X * CURSOR_MAX_Y * CURSOR_ARGB_PIXEL_SIZE) #define CURSOR_COMPLETE (-1) struct synthvid_pointer_shape { u8 part_idx; u8 is_argb; u32 width; /* CURSOR_MAX_X at most */ u32 height; /* CURSOR_MAX_Y at most */ u32 hot_x; /* hotspot relative to upper-left of pointer image */ u32 hot_y; u8 data[4]; } __packed; struct synthvid_feature_change { u8 is_dirt_needed; u8 is_ptr_pos_needed; u8 is_ptr_shape_needed; u8 is_situ_needed; } __packed; struct rect { s32 x1, y1; /* top left corner */ s32 x2, y2; /* bottom right corner, exclusive */ } __packed; struct synthvid_dirt { u8 video_output; u8 dirt_count; struct rect rect[1]; } __packed; struct synthvid_msg { struct pipe_msg_hdr pipe_hdr; struct synthvid_msg_hdr vid_hdr; union { struct synthvid_version_req ver_req; struct synthvid_version_resp ver_resp; struct synthvid_vram_location vram; struct synthvid_vram_location_ack vram_ack; struct synthvid_situation_update situ; struct synthvid_situation_update_ack situ_ack; struct synthvid_pointer_position ptr_pos; struct synthvid_pointer_shape ptr_shape; struct synthvid_feature_change feature_chg; struct synthvid_dirt dirt; }; } __packed; /* FB driver definitions and structures */ #define HVFB_WIDTH 1152 /* default screen width */ #define HVFB_HEIGHT 864 /* default screen height */ #define HVFB_WIDTH_MIN 640 #define HVFB_HEIGHT_MIN 480 #define RING_BUFSIZE (256 * 1024) #define VSP_TIMEOUT (10 * HZ) #define HVFB_UPDATE_DELAY (HZ / 20) struct hvfb_par { struct fb_info *info; struct resource mem; bool fb_ready; /* fb device is ready */ struct completion wait; u32 synthvid_version; struct delayed_work dwork; bool update; u32 pseudo_palette[16]; u8 init_buf[MAX_VMBUS_PKT_SIZE]; u8 recv_buf[MAX_VMBUS_PKT_SIZE]; /* If true, the VSC notifies the VSP on every framebuffer change */ bool synchronous_fb; struct notifier_block hvfb_panic_nb; }; static uint screen_width = HVFB_WIDTH; static uint screen_height = HVFB_HEIGHT; static uint screen_depth; static uint screen_fb_size; /* Send message to Hyper-V host */ static inline int synthvid_send(struct hv_device *hdev, struct synthvid_msg *msg) { static atomic64_t request_id = ATOMIC64_INIT(0); int ret; msg->pipe_hdr.type = PIPE_MSG_DATA; msg->pipe_hdr.size = msg->vid_hdr.size; ret = vmbus_sendpacket(hdev->channel, msg, msg->vid_hdr.size + sizeof(struct pipe_msg_hdr), atomic64_inc_return(&request_id), VM_PKT_DATA_INBAND, 0); if (ret) pr_err("Unable to send packet via vmbus\n"); return ret; } /* Send screen resolution info to host */ static int synthvid_send_situ(struct hv_device *hdev) { struct fb_info *info = hv_get_drvdata(hdev); struct synthvid_msg msg; if (!info) return -ENODEV; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_SITUATION_UPDATE; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_situation_update); msg.situ.user_ctx = 0; msg.situ.video_output_count = 1; msg.situ.video_output[0].active = 1; msg.situ.video_output[0].vram_offset = 0; msg.situ.video_output[0].depth_bits = info->var.bits_per_pixel; msg.situ.video_output[0].width_pixels = info->var.xres; msg.situ.video_output[0].height_pixels = info->var.yres; msg.situ.video_output[0].pitch_bytes = info->fix.line_length; synthvid_send(hdev, &msg); return 0; } /* Send mouse pointer info to host */ static int synthvid_send_ptr(struct hv_device *hdev) { struct synthvid_msg msg; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_POINTER_POSITION; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_pointer_position); msg.ptr_pos.is_visible = 1; msg.ptr_pos.video_output = 0; msg.ptr_pos.image_x = 0; msg.ptr_pos.image_y = 0; synthvid_send(hdev, &msg); memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_POINTER_SHAPE; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_pointer_shape); msg.ptr_shape.part_idx = CURSOR_COMPLETE; msg.ptr_shape.is_argb = 1; msg.ptr_shape.width = 1; msg.ptr_shape.height = 1; msg.ptr_shape.hot_x = 0; msg.ptr_shape.hot_y = 0; msg.ptr_shape.data[0] = 0; msg.ptr_shape.data[1] = 1; msg.ptr_shape.data[2] = 1; msg.ptr_shape.data[3] = 1; synthvid_send(hdev, &msg); return 0; } /* Send updated screen area (dirty rectangle) location to host */ static int synthvid_update(struct fb_info *info) { struct hv_device *hdev = device_to_hv_device(info->device); struct synthvid_msg msg; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_DIRT; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_dirt); msg.dirt.video_output = 0; msg.dirt.dirt_count = 1; msg.dirt.rect[0].x1 = 0; msg.dirt.rect[0].y1 = 0; msg.dirt.rect[0].x2 = info->var.xres; msg.dirt.rect[0].y2 = info->var.yres; synthvid_send(hdev, &msg); return 0; } /* * Actions on received messages from host: * Complete the wait event. * Or, reply with screen and cursor info. */ static void synthvid_recv_sub(struct hv_device *hdev) { struct fb_info *info = hv_get_drvdata(hdev); struct hvfb_par *par; struct synthvid_msg *msg; if (!info) return; par = info->par; msg = (struct synthvid_msg *)par->recv_buf; /* Complete the wait event */ if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE || msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) { memcpy(par->init_buf, msg, MAX_VMBUS_PKT_SIZE); complete(&par->wait); return; } /* Reply with screen and cursor info */ if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { if (par->fb_ready) { synthvid_send_ptr(hdev); synthvid_send_situ(hdev); } par->update = msg->feature_chg.is_dirt_needed; if (par->update) schedule_delayed_work(&par->dwork, HVFB_UPDATE_DELAY); } } /* Receive callback for messages from the host */ static void synthvid_receive(void *ctx) { struct hv_device *hdev = ctx; struct fb_info *info = hv_get_drvdata(hdev); struct hvfb_par *par; struct synthvid_msg *recv_buf; u32 bytes_recvd; u64 req_id; int ret; if (!info) return; par = info->par; recv_buf = (struct synthvid_msg *)par->recv_buf; do { ret = vmbus_recvpacket(hdev->channel, recv_buf, MAX_VMBUS_PKT_SIZE, &bytes_recvd, &req_id); if (bytes_recvd > 0 && recv_buf->pipe_hdr.type == PIPE_MSG_DATA) synthvid_recv_sub(hdev); } while (bytes_recvd > 0 && ret == 0); } /* Check synthetic video protocol version with the host */ static int synthvid_negotiate_ver(struct hv_device *hdev, u32 ver) { 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 t, ret = 0; 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; 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 */ if (vmbus_proto_version == VERSION_WS2008 || vmbus_proto_version == VERSION_WIN7) ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7); else ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8); 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; 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 t, ret = 0; /* 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 = info->fix.smem_start; msg->vram.is_vram_gpa_specified = 1; synthvid_send(hdev, msg);