// SPDX-License-Identifier: GPL-2.0-only/* * Copyright 2021 Microsoft */ #include <linux/hyperv.h> #include <drm/drm_print.h>#include <drm/drm_simple_kms_helper.h> #include "hyperv_drm.h" #define VMBUS_RING_BUFSIZE VMBUS_RING_SIZE(256 * 1024)#define VMBUS_VSP_TIMEOUT (10 * HZ) #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major))#define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff)#define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16) /* Support for VERSION_WIN7 is removed. #define is retained for reference. */#define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0)#define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2)#define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5) #define SYNTHVID_DEPTH_WIN8 32#define SYNTHVID_WIDTH_WIN8 1600#define SYNTHVID_HEIGHT_WIN8 1200#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) enum pipe_msg_type { PIPE_MSG_INVALID, PIPE_MSG_DATA, PIPE_MSG_MAX}; 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_RESOLUTION_REQUEST = 13, SYNTHVID_RESOLUTION_RESPONSE = 14, SYNTHVID_MAX = 15}; struct pipe_msg_hdr { u32 type; u32 size; /* size of message after this field */} __packed; struct hvd_screen_info { u16 width; u16 height;} __packed; 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 SYNTHVID_CURSOR_MAX_X 96#define SYNTHVID_CURSOR_MAX_Y 96#define SYNTHVID_CURSOR_ARGB_PIXEL_SIZE 4#define SYNTHVID_CURSOR_MAX_SIZE (SYNTHVID_CURSOR_MAX_X * \ SYNTHVID_CURSOR_MAX_Y * SYNTHVID_CURSOR_ARGB_PIXEL_SIZE)#define SYNTHVID_CURSOR_COMPLETE (-1) struct synthvid_pointer_shape { u8 part_idx; u8 is_argb; u32 width; /* SYNTHVID_CURSOR_MAX_X at most */ u32 height; /* SYNTHVID_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; #define SYNTHVID_EDID_BLOCK_SIZE 128#define SYNTHVID_MAX_RESOLUTION_COUNT 64 struct synthvid_supported_resolution_req { u8 maximum_resolution_count;} __packed; struct synthvid_supported_resolution_resp { u8 edid_block[SYNTHVID_EDID_BLOCK_SIZE]; u8 resolution_count; u8 default_resolution_index; u8 is_standard; struct hvd_screen_info supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT];} __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; struct synthvid_supported_resolution_req resolution_req; struct synthvid_supported_resolution_resp resolution_resp; };} __packed; static inline bool hv_drm_version_ge(u32 ver1, u32 ver2){ if (SYNTHVID_VER_GET_MAJOR(ver1) > SYNTHVID_VER_GET_MAJOR(ver2) || (SYNTHVID_VER_GET_MAJOR(ver1) == SYNTHVID_VER_GET_MAJOR(ver2) && SYNTHVID_VER_GET_MINOR(ver1) >= SYNTHVID_VER_GET_MINOR(ver2))) return true; return false;} static inline int hv_drm_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg){ static atomic64_t request_id = ATOMIC64_INIT(0); struct hv_drm_device *hv = hv_get_drvdata(hdev); 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) drm_err_ratelimited(&hv->dev, "Unable to send packet via vmbus; error %d\n", ret); return ret;} static int hv_drm_negotiate_version(struct hv_device *hdev, u32 ver){ struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; 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; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting version response\n"); return -ETIMEDOUT; } if (!msg->ver_resp.is_accepted) { drm_err(dev, "Version request not accepted\n"); return -ENODEV; } hv->synthvid_version = ver; drm_info(dev, "Synthvid Version major %d, minor %d\n", SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver)); return 0;} int hv_drm_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp){ struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; 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 = vram_pp; msg->vram.vram_gpa = vram_pp; msg->vram.is_vram_gpa_specified = 1; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting vram location ack\n"); return -ETIMEDOUT; } if (msg->vram_ack.user_ctx != vram_pp) { drm_err(dev, "Unable to set VRAM location\n"); return -ENODEV; } return 0;} int hv_drm_update_situation(struct hv_device *hdev, u8 active, u32 bpp, u32 w, u32 h, u32 pitch){ struct synthvid_msg msg; 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 = active; /* vram_offset should always be 0 */ msg.situ.video_output[0].vram_offset = 0; msg.situ.video_output[0].depth_bits = bpp; msg.situ.video_output[0].width_pixels = w; msg.situ.video_output[0].height_pixels = h; msg.situ.video_output[0].pitch_bytes = pitch; hv_drm_sendpacket(hdev, &msg); return 0;} /* * Hyper-V supports a hardware cursor feature. It's not used by Linux VM, * but the Hyper-V host still draws a point as an extra mouse pointer, * which is unwanted, especially when Xorg is running. * * Hide the unwanted pointer, by setting msg.ptr_pos.is_visible = 1 and setting * the msg.ptr_shape.data. Note: setting msg.ptr_pos.is_visible to 0 doesn't * work in tests. * * The hv_drm_hide_hw_ptr() is also called in the handler of the * SYNTHVID_FEATURE_CHANGE event, otherwise the host still draws an extra * unwanted mouse pointer after the VM Connection window is closed and reopened. */int hv_drm_hide_hw_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; hv_drm_sendpacket(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 = SYNTHVID_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; hv_drm_sendpacket(hdev, &msg); return 0;} int hv_drm_update_dirt(struct hv_device *hdev, struct drm_rect *rect){ struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg msg; if (!hv->dirt_needed) return 0; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_DIRT; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_dirt); msg.dirt.video_output = 0; msg.dirt.dirt_count = 1; msg.dirt.rect[0].x1 = rect->x1; msg.dirt.rect[0].y1 = rect->y1; msg.dirt.rect[0].x2 = rect->x2; msg.dirt.rect[0].y2 = rect->y2; hv_drm_sendpacket(hdev, &msg); return 0;} static int hv_drm_get_supported_resolution(struct hv_device *hdev){ struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; u8 index; int i; memset(msg, 0, sizeof(struct synthvid_msg)); msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST; msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_supported_resolution_req); msg->resolution_req.maximum_resolution_count = SYNTHVID_MAX_RESOLUTION_COUNT; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting resolution response\n"); return -ETIMEDOUT; } if (msg->resolution_resp.resolution_count == 0 || msg->resolution_resp.resolution_count > SYNTHVID_MAX_RESOLUTION_COUNT) { drm_err(dev, "Invalid resolution count: %d\n", msg->resolution_resp.resolution_count); return -ENODEV; } index = msg->resolution_resp.default_resolution_index; if (index >= msg->resolution_resp.resolution_count) { drm_err(dev, "Invalid resolution index: %d\n", index); return -ENODEV; } for (i = 0; i < msg->resolution_resp.resolution_count; i++) { hv->screen_width_max = max_t(u32, hv->screen_width_max, msg->resolution_resp.supported_resolution[i].width); hv->screen_height_max = max_t(u32, hv->screen_height_max, msg->resolution_resp.supported_resolution[i].height); } hv->preferred_width = msg->resolution_resp.supported_resolution[index].width; hv->preferred_height = msg->resolution_resp.supported_resolution[index].height; return 0;} static void hv_drm_receive_sub(struct hv_device *hdev, u32 bytes_recvd){ struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg; size_t hdr_size; size_t need; if (!hv) return; hdr_size = sizeof(struct pipe_msg_hdr) + sizeof(struct synthvid_msg_hdr); if (bytes_recvd < hdr_size) { drm_err_ratelimited(&hv->dev, "synthvid packet too small for header: %u\n", bytes_recvd); return; } msg = (struct synthvid_msg *)hv->recv_buf; need = hdr_size; switch (msg->vid_hdr.type) { case SYNTHVID_VERSION_RESPONSE: need += sizeof(struct synthvid_version_resp); break; case SYNTHVID_RESOLUTION_RESPONSE: /* * The resolution response is variable length: the host * fills resolution_count entries, not the full * SYNTHVID_MAX_RESOLUTION_COUNT array. Require the fixed * prefix first so resolution_count can be read, then * demand exactly the count-sized array. */ need += offsetof(struct synthvid_supported_resolution_resp, supported_resolution); if (bytes_recvd < need) break; if (msg->resolution_resp.resolution_count > SYNTHVID_MAX_RESOLUTION_COUNT) { drm_err_ratelimited(&hv->dev, "synthvid resolution count too large: %u\n", msg->resolution_resp.resolution_count); return; } need += msg->resolution_resp.resolution_count * sizeof(struct hvd_screen_info); break; case SYNTHVID_VRAM_LOCATION_ACK: need += sizeof(struct synthvid_vram_location_ack); break; case SYNTHVID_FEATURE_CHANGE: /* * Not a completion-driving message: validate its own payload * and consume it here rather than falling through to the * memcpy/complete shared by the wait-event responses. */ if (bytes_recvd < need + sizeof(struct synthvid_feature_change)) { drm_err_ratelimited(&hv->dev, "synthvid feature change packet too small: %u\n", bytes_recvd); return; } hv->dirt_needed = msg->feature_chg.is_dirt_needed; if (hv->dirt_needed) hv_drm_hide_hw_ptr(hv->hdev); return; default: return; } /* * Shared completion path for the wait-event responses * (VERSION_RESPONSE, RESOLUTION_RESPONSE, VRAM_LOCATION_ACK): * require the type-specific payload before handing the buffer to * the waiter. */Lines 1–500 of 604. 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// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2021 Microsoft */ #include <linux/hyperv.h> #include <drm/drm_print.h> #include <drm/drm_simple_kms_helper.h> #include "hyperv_drm.h" #define VMBUS_RING_BUFSIZE VMBUS_RING_SIZE(256 * 1024) #define VMBUS_VSP_TIMEOUT (10 * HZ) #define SYNTHVID_VERSION(major, minor) ((minor) << 16 | (major)) #define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff) #define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16) /* Support for VERSION_WIN7 is removed. #define is retained for reference. */ #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) #define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5) #define SYNTHVID_DEPTH_WIN8 32 #define SYNTHVID_WIDTH_WIN8 1600 #define SYNTHVID_HEIGHT_WIN8 1200 #define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024) enum pipe_msg_type { PIPE_MSG_INVALID, PIPE_MSG_DATA, PIPE_MSG_MAX }; 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_RESOLUTION_REQUEST = 13, SYNTHVID_RESOLUTION_RESPONSE = 14, SYNTHVID_MAX = 15 }; struct pipe_msg_hdr { u32 type; u32 size; /* size of message after this field */ } __packed; struct hvd_screen_info { u16 width; u16 height; } __packed; 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 SYNTHVID_CURSOR_MAX_X 96 #define SYNTHVID_CURSOR_MAX_Y 96 #define SYNTHVID_CURSOR_ARGB_PIXEL_SIZE 4 #define SYNTHVID_CURSOR_MAX_SIZE (SYNTHVID_CURSOR_MAX_X * \ SYNTHVID_CURSOR_MAX_Y * SYNTHVID_CURSOR_ARGB_PIXEL_SIZE) #define SYNTHVID_CURSOR_COMPLETE (-1) struct synthvid_pointer_shape { u8 part_idx; u8 is_argb; u32 width; /* SYNTHVID_CURSOR_MAX_X at most */ u32 height; /* SYNTHVID_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; #define SYNTHVID_EDID_BLOCK_SIZE 128 #define SYNTHVID_MAX_RESOLUTION_COUNT 64 struct synthvid_supported_resolution_req { u8 maximum_resolution_count; } __packed; struct synthvid_supported_resolution_resp { u8 edid_block[SYNTHVID_EDID_BLOCK_SIZE]; u8 resolution_count; u8 default_resolution_index; u8 is_standard; struct hvd_screen_info supported_resolution[SYNTHVID_MAX_RESOLUTION_COUNT]; } __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; struct synthvid_supported_resolution_req resolution_req; struct synthvid_supported_resolution_resp resolution_resp; }; } __packed; static inline bool hv_drm_version_ge(u32 ver1, u32 ver2) { if (SYNTHVID_VER_GET_MAJOR(ver1) > SYNTHVID_VER_GET_MAJOR(ver2) || (SYNTHVID_VER_GET_MAJOR(ver1) == SYNTHVID_VER_GET_MAJOR(ver2) && SYNTHVID_VER_GET_MINOR(ver1) >= SYNTHVID_VER_GET_MINOR(ver2))) return true; return false; } static inline int hv_drm_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg) { static atomic64_t request_id = ATOMIC64_INIT(0); struct hv_drm_device *hv = hv_get_drvdata(hdev); 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) drm_err_ratelimited(&hv->dev, "Unable to send packet via vmbus; error %d\n", ret); return ret; } static int hv_drm_negotiate_version(struct hv_device *hdev, u32 ver) { struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; 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; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting version response\n"); return -ETIMEDOUT; } if (!msg->ver_resp.is_accepted) { drm_err(dev, "Version request not accepted\n"); return -ENODEV; } hv->synthvid_version = ver; drm_info(dev, "Synthvid Version major %d, minor %d\n", SYNTHVID_VER_GET_MAJOR(ver), SYNTHVID_VER_GET_MINOR(ver)); return 0; } int hv_drm_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp) { struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; 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 = vram_pp; msg->vram.vram_gpa = vram_pp; msg->vram.is_vram_gpa_specified = 1; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting vram location ack\n"); return -ETIMEDOUT; } if (msg->vram_ack.user_ctx != vram_pp) { drm_err(dev, "Unable to set VRAM location\n"); return -ENODEV; } return 0; } int hv_drm_update_situation(struct hv_device *hdev, u8 active, u32 bpp, u32 w, u32 h, u32 pitch) { struct synthvid_msg msg; 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 = active; /* vram_offset should always be 0 */ msg.situ.video_output[0].vram_offset = 0; msg.situ.video_output[0].depth_bits = bpp; msg.situ.video_output[0].width_pixels = w; msg.situ.video_output[0].height_pixels = h; msg.situ.video_output[0].pitch_bytes = pitch; hv_drm_sendpacket(hdev, &msg); return 0; } /* * Hyper-V supports a hardware cursor feature. It's not used by Linux VM, * but the Hyper-V host still draws a point as an extra mouse pointer, * which is unwanted, especially when Xorg is running. * * Hide the unwanted pointer, by setting msg.ptr_pos.is_visible = 1 and setting * the msg.ptr_shape.data. Note: setting msg.ptr_pos.is_visible to 0 doesn't * work in tests. * * The hv_drm_hide_hw_ptr() is also called in the handler of the * SYNTHVID_FEATURE_CHANGE event, otherwise the host still draws an extra * unwanted mouse pointer after the VM Connection window is closed and reopened. */ int hv_drm_hide_hw_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; hv_drm_sendpacket(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 = SYNTHVID_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; hv_drm_sendpacket(hdev, &msg); return 0; } int hv_drm_update_dirt(struct hv_device *hdev, struct drm_rect *rect) { struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg msg; if (!hv->dirt_needed) return 0; memset(&msg, 0, sizeof(struct synthvid_msg)); msg.vid_hdr.type = SYNTHVID_DIRT; msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_dirt); msg.dirt.video_output = 0; msg.dirt.dirt_count = 1; msg.dirt.rect[0].x1 = rect->x1; msg.dirt.rect[0].y1 = rect->y1; msg.dirt.rect[0].x2 = rect->x2; msg.dirt.rect[0].y2 = rect->y2; hv_drm_sendpacket(hdev, &msg); return 0; } static int hv_drm_get_supported_resolution(struct hv_device *hdev) { struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; struct drm_device *dev = &hv->dev; unsigned long t; u8 index; int i; memset(msg, 0, sizeof(struct synthvid_msg)); msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST; msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + sizeof(struct synthvid_supported_resolution_req); msg->resolution_req.maximum_resolution_count = SYNTHVID_MAX_RESOLUTION_COUNT; hv_drm_sendpacket(hdev, msg); t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); if (!t) { drm_err(dev, "Time out on waiting resolution response\n"); return -ETIMEDOUT; } if (msg->resolution_resp.resolution_count == 0 || msg->resolution_resp.resolution_count > SYNTHVID_MAX_RESOLUTION_COUNT) { drm_err(dev, "Invalid resolution count: %d\n", msg->resolution_resp.resolution_count); return -ENODEV; } index = msg->resolution_resp.default_resolution_index; if (index >= msg->resolution_resp.resolution_count) { drm_err(dev, "Invalid resolution index: %d\n", index); return -ENODEV; } for (i = 0; i < msg->resolution_resp.resolution_count; i++) { hv->screen_width_max = max_t(u32, hv->screen_width_max, msg->resolution_resp.supported_resolution[i].width); hv->screen_height_max = max_t(u32, hv->screen_height_max, msg->resolution_resp.supported_resolution[i].height); } hv->preferred_width = msg->resolution_resp.supported_resolution[index].width; hv->preferred_height = msg->resolution_resp.supported_resolution[index].height; return 0; } static void hv_drm_receive_sub(struct hv_device *hdev, u32 bytes_recvd) { struct hv_drm_device *hv = hv_get_drvdata(hdev); struct synthvid_msg *msg; size_t hdr_size; size_t need; if (!hv) return; hdr_size = sizeof(struct pipe_msg_hdr) + sizeof(struct synthvid_msg_hdr); if (bytes_recvd < hdr_size) { drm_err_ratelimited(&hv->dev, "synthvid packet too small for header: %u\n", bytes_recvd); return; } msg = (struct synthvid_msg *)hv->recv_buf; need = hdr_size; switch (msg->vid_hdr.type) { case SYNTHVID_VERSION_RESPONSE: need += sizeof(struct synthvid_version_resp); break; case SYNTHVID_RESOLUTION_RESPONSE: /* * The resolution response is variable length: the host * fills resolution_count entries, not the full * SYNTHVID_MAX_RESOLUTION_COUNT array. Require the fixed * prefix first so resolution_count can be read, then * demand exactly the count-sized array. */ need += offsetof(struct synthvid_supported_resolution_resp, supported_resolution); if (bytes_recvd < need) break; if (msg->resolution_resp.resolution_count > SYNTHVID_MAX_RESOLUTION_COUNT) { drm_err_ratelimited(&hv->dev, "synthvid resolution count too large: %u\n", msg->resolution_resp.resolution_count); return; } need += msg->resolution_resp.resolution_count * sizeof(struct hvd_screen_info); break; case SYNTHVID_VRAM_LOCATION_ACK: need += sizeof(struct synthvid_vram_location_ack); break; case SYNTHVID_FEATURE_CHANGE: /* * Not a completion-driving message: validate its own payload * and consume it here rather than falling through to the * memcpy/complete shared by the wait-event responses. */ if (bytes_recvd < need + sizeof(struct synthvid_feature_change)) { drm_err_ratelimited(&hv->dev, "synthvid feature change packet too small: %u\n", bytes_recvd); return; } hv->dirt_needed = msg->feature_chg.is_dirt_needed; if (hv->dirt_needed) hv_drm_hide_hw_ptr(hv->hdev); return; default: return; } /* * Shared completion path for the wait-event responses * (VERSION_RESPONSE, RESOLUTION_RESPONSE, VRAM_LOCATION_ACK): * require the type-specific payload before handing the buffer to * the waiter. */