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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/hyperv/hyperv_drm_proto.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/hyperv/hyperv_drm_proto.c')
-rw-r--r-- | drivers/gpu/drm/hyperv/hyperv_drm_proto.c | 528 |
1 files changed, 528 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c new file mode 100644 index 0000000000..013a782918 --- /dev/null +++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c @@ -0,0 +1,528 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2021 Microsoft + * + * Portions of this code is derived from hyperv_fb.c + */ + +#include <linux/hyperv.h> + +#include <drm/drm_print.h> +#include <drm/drm_simple_kms_helper.h> + +#include "hyperv_drm.h" + +#define VMBUS_RING_BUFSIZE (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 hyperv_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 hyperv_sendpacket(struct hv_device *hdev, struct synthvid_msg *msg) +{ + static atomic64_t request_id = ATOMIC64_INIT(0); + struct hyperv_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 hyperv_negotiate_version(struct hv_device *hdev, u32 ver) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; + struct drm_device *dev = &hv->dev; + unsigned long t; + + 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; + hyperv_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 hyperv_update_vram_location(struct hv_device *hdev, phys_addr_t vram_pp) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; + struct drm_device *dev = &hv->dev; + unsigned long t; + + 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; + hyperv_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 hyperv_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; + + hyperv_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. + * + * The hyperv_fb driver uses synthvid_send_ptr() to 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. + * + * Copy synthvid_send_ptr() to hyperv_drm and rename it to + * hyperv_hide_hw_ptr(). Note: hyperv_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 hyperv_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; + hyperv_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; + hyperv_sendpacket(hdev, &msg); + + return 0; +} + +int hyperv_update_dirt(struct hv_device *hdev, struct drm_rect *rect) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg msg; + + if (!hv->dirt_needed) + return 0; + + memset(&msg, 0, sizeof(struct synthvid_msg)); + + msg.vid_hdr.type = SYNTHVID_DIRT; + msg.vid_hdr.size = sizeof(struct synthvid_msg_hdr) + + sizeof(struct synthvid_dirt); + msg.dirt.video_output = 0; + msg.dirt.dirt_count = 1; + msg.dirt.rect[0].x1 = rect->x1; + msg.dirt.rect[0].y1 = rect->y1; + msg.dirt.rect[0].x2 = rect->x2; + msg.dirt.rect[0].y2 = rect->y2; + + hyperv_sendpacket(hdev, &msg); + + return 0; +} + +static int hyperv_get_supported_resolution(struct hv_device *hdev) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg *msg = (struct synthvid_msg *)hv->init_buf; + struct drm_device *dev = &hv->dev; + unsigned long t; + u8 index; + int i; + + memset(msg, 0, sizeof(struct synthvid_msg)); + msg->vid_hdr.type = SYNTHVID_RESOLUTION_REQUEST; + msg->vid_hdr.size = sizeof(struct synthvid_msg_hdr) + + sizeof(struct synthvid_supported_resolution_req); + msg->resolution_req.maximum_resolution_count = + SYNTHVID_MAX_RESOLUTION_COUNT; + hyperv_sendpacket(hdev, msg); + + t = wait_for_completion_timeout(&hv->wait, VMBUS_VSP_TIMEOUT); + if (!t) { + drm_err(dev, "Time out on waiting resolution response\n"); + return -ETIMEDOUT; + } + + if (msg->resolution_resp.resolution_count == 0) { + drm_err(dev, "No supported resolutions\n"); + return -ENODEV; + } + + index = msg->resolution_resp.default_resolution_index; + if (index >= msg->resolution_resp.resolution_count) { + drm_err(dev, "Invalid resolution index: %d\n", index); + return -ENODEV; + } + + for (i = 0; i < msg->resolution_resp.resolution_count; i++) { + hv->screen_width_max = max_t(u32, hv->screen_width_max, + msg->resolution_resp.supported_resolution[i].width); + hv->screen_height_max = max_t(u32, hv->screen_height_max, + msg->resolution_resp.supported_resolution[i].height); + } + + hv->preferred_width = + msg->resolution_resp.supported_resolution[index].width; + hv->preferred_height = + msg->resolution_resp.supported_resolution[index].height; + + return 0; +} + +static void hyperv_receive_sub(struct hv_device *hdev) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg *msg; + + if (!hv) + return; + + msg = (struct synthvid_msg *)hv->recv_buf; + + /* Complete the wait event */ + if (msg->vid_hdr.type == SYNTHVID_VERSION_RESPONSE || + msg->vid_hdr.type == SYNTHVID_RESOLUTION_RESPONSE || + msg->vid_hdr.type == SYNTHVID_VRAM_LOCATION_ACK) { + memcpy(hv->init_buf, msg, VMBUS_MAX_PACKET_SIZE); + complete(&hv->wait); + return; + } + + if (msg->vid_hdr.type == SYNTHVID_FEATURE_CHANGE) { + hv->dirt_needed = msg->feature_chg.is_dirt_needed; + if (hv->dirt_needed) + hyperv_hide_hw_ptr(hv->hdev); + } +} + +static void hyperv_receive(void *ctx) +{ + struct hv_device *hdev = ctx; + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct synthvid_msg *recv_buf; + u32 bytes_recvd; + u64 req_id; + int ret; + + if (!hv) + return; + + recv_buf = (struct synthvid_msg *)hv->recv_buf; + + do { + ret = vmbus_recvpacket(hdev->channel, recv_buf, + VMBUS_MAX_PACKET_SIZE, + &bytes_recvd, &req_id); + if (bytes_recvd > 0 && + recv_buf->pipe_hdr.type == PIPE_MSG_DATA) + hyperv_receive_sub(hdev); + } while (bytes_recvd > 0 && ret == 0); +} + +int hyperv_connect_vsp(struct hv_device *hdev) +{ + struct hyperv_drm_device *hv = hv_get_drvdata(hdev); + struct drm_device *dev = &hv->dev; + int ret; + + ret = vmbus_open(hdev->channel, VMBUS_RING_BUFSIZE, VMBUS_RING_BUFSIZE, + NULL, 0, hyperv_receive, hdev); + if (ret) { + drm_err(dev, "Unable to open vmbus channel\n"); + return ret; + } + + /* Negotiate the protocol version with host */ + switch (vmbus_proto_version) { + case VERSION_WIN10: + case VERSION_WIN10_V5: + ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); + if (!ret) + break; + fallthrough; + case VERSION_WIN8: + case VERSION_WIN8_1: + ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN8); + break; + default: + ret = hyperv_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); + break; + } + + if (ret) { + drm_err(dev, "Synthetic video device version not accepted %d\n", ret); + goto error; + } + + hv->screen_depth = SYNTHVID_DEPTH_WIN8; + + if (hyperv_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) { + ret = hyperv_get_supported_resolution(hdev); + if (ret) + drm_err(dev, "Failed to get supported resolution from host, use default\n"); + } else { + hv->screen_width_max = SYNTHVID_WIDTH_WIN8; + hv->screen_height_max = SYNTHVID_HEIGHT_WIN8; + } + + hv->mmio_megabytes = hdev->channel->offermsg.offer.mmio_megabytes; + + return 0; + +error: + vmbus_close(hdev->channel); + return ret; +} |