+
+ ret = vmbus_allocate_mmio(&hv->mem, hdev, 0, -1, hv-
quoted
fb_size, 0x100000,
+ true);
+ if (ret) {
+ drm_err(dev, "Failed to allocate mmio\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * 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.
+ */
+ hv->vram = ioremap_cache(hv->mem->start, hv->fb_size);
+ if (!hv->vram) {
+ drm_err(dev, "Failed to map vram\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ hv->fb_base = hv->mem->start;
+
+ ap = alloc_apertures(1);
+ if (!ap) {
+ drm_err(dev, "Failed to get apertures\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ ap->ranges[0].base = screen_info.lfb_base;
+ ap->ranges[0].size = screen_info.lfb_size;
+ remove_conflicting_framebuffers(ap, KBUILD_MODNAME, false);
+ kfree(ap);
+
+ return 0;
+
+error:
+ vmbus_free_mmio(hv->mem->start, hv->fb_size);
+ return ret;
+}
+
+static int hyperv_vmbus_probe(struct hv_device *hdev,
+ const struct hv_vmbus_device_id
*dev_id)
+{
+ struct hyperv_drm_device *hv;
+ struct drm_device *dev;
+ int ret;
+
+ hv = devm_drm_dev_alloc(&hdev->device, &hyperv_driver,
+ struct hyperv_drm_device, dev);
+ if (IS_ERR(hv))
+ return PTR_ERR(hv);
+
+ dev = &hv->dev;
+ init_completion(&hv->wait);
+ hv_set_drvdata(hdev, hv);
+ hv->hdev = hdev;
+
+ /* Get the actual VRAM size from the device */
+ ret = hyperv_connect_vsp(hdev);
+ if (ret) {
+ drm_err(dev, "Failed to connect to vmbus.\n");
+ goto err_hv_set_drv_data;
+ }
+
+ if (efi_enabled(EFI_BOOT))
+ ret = hyperv_get_vram_gen2(hv, hdev);
+ else
+ ret = hyperv_get_vram_gen1(hv);
+
+ if (ret)
+ goto err_vmbus_close;
+
+ /*
+ * Should be done only once during init and resume. Failing
to update
+ * vram location is not fatal. Device will update dirty
area till
+ * preferred resolution only.
+ */
+ ret = hyperv_update_vram_location(hdev, hv->fb_base);
+ if (ret)
+ drm_warn(dev, "Failed to update vram location.\n");
+
+ ret = hyperv_mode_config_init(hv);
+ if (ret)
+ goto err_vmbus_close;
+
+ ret = drm_dev_register(dev, 0);
+ if (ret) {
+ drm_err(dev, "Failed to register drm driver.\n");
+ goto err_vmbus_close;
+ }
+
+ drm_fbdev_generic_setup(dev, 0);
+
+ return 0;
+
+err_vmbus_close:
+ vmbus_close(hdev->channel);
+err_hv_set_drv_data:
+ hv_set_drvdata(hdev, NULL);
+ return ret;
+}
+
+static int hyperv_vmbus_remove(struct hv_device *hdev)
+{
+ struct drm_device *dev = hv_get_drvdata(hdev);
+ struct hyperv_drm_device *hv = to_hv(dev);
+
+ drm_dev_unplug(dev);
+ drm_atomic_helper_shutdown(dev);
+ vmbus_close(hdev->channel);
+ hv_set_drvdata(hdev, NULL);
+ vmbus_free_mmio(hv->mem->start, hv->fb_size);
+
+ return 0;
+}
+
+static int hyperv_vmbus_suspend(struct hv_device *hdev)
+{
+ struct drm_device *dev = hv_get_drvdata(hdev);
+ int ret;
+
+ ret = drm_mode_config_helper_suspend(dev);
+
+ vmbus_close(hdev->channel);
+
+ return ret;
+}
+
+static int hyperv_vmbus_resume(struct hv_device *hdev)
+{
+ struct drm_device *dev = hv_get_drvdata(hdev);
+ struct hyperv_drm_device *hv = to_hv(dev);
+ int ret;
+
+ ret = hyperv_connect_vsp(hdev);
+ if (ret)
+ return ret;
+
+ ret = hyperv_update_vram_location(hdev, hv->fb_base);
+ if (ret)
+ return ret;
+
+ return drm_mode_config_helper_resume(dev);
+}
+
+static const struct hv_vmbus_device_id hyperv_vmbus_tbl[] = {
+ /* Synthetic Video Device GUID */
+ {HV_SYNTHVID_GUID},
+ {}
+};
+
+static struct hv_driver hyperv_hv_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = hyperv_vmbus_tbl,
+ .probe = hyperv_vmbus_probe,
+ .remove = hyperv_vmbus_remove,
+ .suspend = hyperv_vmbus_suspend,
+ .resume = hyperv_vmbus_resume,
+ .driver = {
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ },
+};
+
+static int __init hyperv_init(void)
+{
+ int ret;
+
+ ret = pci_register_driver(&hyperv_pci_driver);
+ if (ret != 0)
+ return ret;
+
+ return vmbus_driver_register(&hyperv_hv_driver);
+}
+
+static void __exit hyperv_exit(void)
+{
+ vmbus_driver_unregister(&hyperv_hv_driver);
+ pci_unregister_driver(&hyperv_pci_driver);
+}
+
+module_init(hyperv_init);
+module_exit(hyperv_exit);
+
+MODULE_DEVICE_TABLE(pci, hyperv_pci_tbl);
+MODULE_DEVICE_TABLE(vmbus, hyperv_vmbus_tbl);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Deepak Rawat [off-list ref]");
+MODULE_DESCRIPTION("DRM driver for hyperv synthetic video
device");diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
new file mode 100644
index 000000000000..40ec0cff0e59
--- /dev/null
+++ b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
@@ -0,0 +1,240 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2012-2021 Microsoft
+ */
+
+#include <linux/hyperv.h>
+
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_format_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_shmem_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include "hyperv_drm.h"
+
+static int hyperv_blit_to_vram_rect(struct drm_framebuffer *fb,
+ struct drm_rect *rect)
+{
+ struct hyperv_drm_device *hv = to_hv(fb->dev);
+ struct dma_buf_map map;
+ void *vmap;
+ int idx, ret;
+
+ if (!drm_dev_enter(&hv->dev, &idx))
+ return -ENODEV;
+
+ ret = drm_gem_shmem_vmap(fb->obj[0], &map);
+ if (ret) {
+ drm_dev_exit(idx);
+ return ret;
+ }
+
+ vmap = map.vaddr;
+ drm_fb_memcpy_dstclip(hv->vram, vmap, fb, rect);
+ drm_gem_shmem_vunmap(fb->obj[0], vmap);
+ drm_dev_exit(idx);
+
+ return 0;
+}
+
+static int hyperv_blit_to_vram_fullscreen(struct drm_framebuffer*fb)
+{
+ struct drm_rect fullscreen = {
+ .x1 = 0,
+ .x2 = fb->width,
+ .y1 = 0,
+ .y2 = fb->height,
+ };
+ return hyperv_blit_to_vram_rect(fb, &fullscreen);
+}
+
+static int hyperv_connector_get_modes(struct drm_connector
*connector)
+{
+ struct hyperv_drm_device *hv = to_hv(connector->dev);
+ int count;
+
+ count = drm_add_modes_noedid(connector,
+ connector->dev-quoted
mode_config.max_width,
+ connector->dev-
quoted
mode_config.max_height);
+ drm_set_preferred_mode(connector, hv->preferred_width,
+ hv->preferred_height);
+
+ return count;
+}
+
+static const struct drm_connector_helper_funcs
hyperv_connector_helper_funcs = {
+ .get_modes = hyperv_connector_get_modes,
+};
+
+static const struct drm_connector_funcs hyperv_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .reset = drm_atomic_helper_connector_reset,
+ .atomic_duplicate_state =
drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state =
drm_atomic_helper_connector_destroy_state,
+};
+
+static int hyperv_conn_init(struct hyperv_drm_device *hv)
+{
+ drm_connector_helper_add(&hv->connector,
&hyperv_connector_helper_funcs);
+ return drm_connector_init(&hv->dev, &hv->connector,
+ &hyperv_connector_funcs,
+ DRM_MODE_CONNECTOR_VGA);
+}
+
+static int hyperv_check_size(struct hyperv_drm_device *hv, int w,
int h,
+ struct drm_framebuffer *fb)
+{
+ u32 pitch = w * (hv->screen_depth / 8);
+
+ if (fb)
+ pitch = fb->pitches[0];
+
+ if (pitch * h > hv->fb_size)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void hyperv_pipe_enable(struct drm_simple_display_pipe
*pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
+
+ hyperv_update_situation(hv->hdev, 1, hv->screen_depth,
+ crtc_state->mode.hdisplay,
+ crtc_state->mode.vdisplay,
+ plane_state->fb->pitches[0]);
+ hyperv_blit_to_vram_fullscreen(plane_state->fb);
+}
+
+static int hyperv_pipe_check(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state,
+ struct drm_crtc_state *crtc_state)
+{
+ struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
+ struct drm_framebuffer *fb = plane_state->fb;
+
+ if (fb->format->format != DRM_FORMAT_XRGB8888)
+ return -EINVAL;
+
+ if (fb->pitches[0] * fb->height > hv->fb_size)
+ return -EINVAL;
+
+ return 0;
+}
+
+static void hyperv_pipe_update(struct drm_simple_display_pipe
*pipe,
+ struct drm_plane_state *old_state)
+{
+ struct hyperv_drm_device *hv = to_hv(pipe->crtc.dev);
+ struct drm_plane_state *state = pipe->plane.state;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state,
&rect)) {
+ hyperv_blit_to_vram_rect(state->fb, &rect);
+ hyperv_update_dirt(hv->hdev, &rect);
+ }
+}
+
+static const struct drm_simple_display_pipe_funcs
hyperv_pipe_funcs = {
+ .enable = hyperv_pipe_enable,
+ .check = hyperv_pipe_check,
+ .update = hyperv_pipe_update,
+};
+
+static const uint32_t hyperv_formats[] = {
+ DRM_FORMAT_XRGB8888,
+};
+
+static const uint64_t hyperv_modifiers[] = {
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID
+};
+
+static int hyperv_pipe_init(struct hyperv_drm_device *hv)
+{
+ int ret;
+
+ ret = drm_simple_display_pipe_init(&hv->dev,
+ &hv->pipe,
+ &hyperv_pipe_funcs,
+ hyperv_formats,
+
ARRAY_SIZE(hyperv_formats),
+ NULL,
+ &hv->connector);
+
+ drm_plane_enable_fb_damage_clips(&hv->pipe.plane);
+
+ return ret;
+}
+
+static struct drm_framebuffer*
+hyperv_fb_create(struct drm_device *dev, struct drm_file
*file_priv,
+ const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ return drm_gem_fb_create_with_dirty(dev, file_priv,
mode_cmd);
+}
+
+static enum drm_mode_status
+hyperv_mode_valid(struct drm_device *dev,
+ const struct drm_display_mode *mode)
+{
+ struct hyperv_drm_device *hv = to_hv(dev);
+
+ if (hyperv_check_size(hv, mode->hdisplay, mode->vdisplay,
NULL))
+ return MODE_BAD;
+
+ return MODE_OK;
+}
+
+static const struct drm_mode_config_funcs hyperv_mode_config_funcs
= {
+ .fb_create = hyperv_fb_create,
+ .mode_valid = hyperv_mode_valid,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+int hyperv_mode_config_init(struct hyperv_drm_device *hv)
+{
+ struct drm_device *dev = &hv->dev;
+ int ret;
+
+ ret = drmm_mode_config_init(dev);
+ if (ret) {
+ drm_err(dev, "Failed to initialized mode
setting.\n");
+ return ret;
+ }
+
+ dev->mode_config.min_width = 0;
+ dev->mode_config.min_height = 0;
+ dev->mode_config.max_width = hv->screen_width_max;
+ dev->mode_config.max_height = hv->screen_height_max;
+
+ dev->mode_config.preferred_depth = hv->screen_depth;
+ dev->mode_config.prefer_shadow = 0;
+
+ dev->mode_config.funcs = &hyperv_mode_config_funcs;
+
+ ret = hyperv_conn_init(hv);
+ if (ret) {
+ drm_err(dev, "Failed to initialized connector.\n");
+ return ret;
+ }
+
+ ret = hyperv_pipe_init(hv);
+ if (ret) {
+ drm_err(dev, "Failed to initialized pipe.\n");
+ return ret;
+ }
+
+ drm_mode_config_reset(dev);
+
+ return 0;
+}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 000000000000..4e61992be121
--- /dev/null
+++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c
@@ -0,0 +1,486 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2012-2021 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 (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)
+#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_WIN7 16
+#define SYNTHVID_DEPTH_WIN8 32
+#define SYNTHVID_FB_SIZE_WIN7 (4 * 1024 * 1024)
+#define SYNTHVID_FB_SIZE_WIN8 (8 * 1024 * 1024)
+#define SYNTHVID_WIDTH_MAX_WIN7 1600
+#define SYNTHVID_HEIGHT_MAX_WIN7 1200
+
+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 thisfield */
+} __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(&hv->dev, "Unable to send packet via
vmbus\n");
+
+ 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-quoted
init_buf;
+ struct drm_device *dev = &hv->dev;
+ unsigned long t;
+ int 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;
+ 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");
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+ if (!msg->ver_resp.is_accepted) {
+ ret = -ENODEV;
+ goto out;