/* * Copyright (C) 2015 Red Hat, Inc. * All Rights Reserved. * * Authors: *    Dave Airlie *    Alon Levy * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include "virtgpu_drv.h"#include <drm/drm_crtc_helper.h>#include <drm/drm_atomic_helper.h> #define XRES_MIN    32#define YRES_MIN    32 #define XRES_DEF  1024#define YRES_DEF   768 #define XRES_MAX  8192#define YRES_MAX  8192 static const struct drm_crtc_funcs virtio_gpu_crtc_funcs = {	.set_config             = drm_atomic_helper_set_config,	.destroy                = drm_crtc_cleanup, 	.page_flip              = drm_atomic_helper_page_flip,	.reset                  = drm_atomic_helper_crtc_reset,	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,	.atomic_destroy_state   = drm_atomic_helper_crtc_destroy_state,}; static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb){	struct virtio_gpu_framebuffer *virtio_gpu_fb		= to_virtio_gpu_framebuffer(fb); 	drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);	drm_framebuffer_cleanup(fb);	kfree(virtio_gpu_fb);} static intvirtio_gpu_framebuffer_surface_dirty(struct drm_framebuffer *fb,				     struct drm_file *file_priv,				     unsigned flags, unsigned color,				     struct drm_clip_rect *clips,				     unsigned num_clips){	struct virtio_gpu_framebuffer *virtio_gpu_fb		= to_virtio_gpu_framebuffer(fb); 	return virtio_gpu_surface_dirty(virtio_gpu_fb, clips, num_clips);} static const struct drm_framebuffer_funcs virtio_gpu_fb_funcs = {	.destroy = virtio_gpu_user_framebuffer_destroy,	.dirty = virtio_gpu_framebuffer_surface_dirty,}; intvirtio_gpu_framebuffer_init(struct drm_device *dev,			    struct virtio_gpu_framebuffer *vgfb,			    const struct drm_mode_fb_cmd2 *mode_cmd,			    struct drm_gem_object *obj){	int ret;	struct virtio_gpu_object *bo;	vgfb->obj = obj; 	bo = gem_to_virtio_gpu_obj(obj); 	drm_helper_mode_fill_fb_struct(dev, &vgfb->base, mode_cmd); 	ret = drm_framebuffer_init(dev, &vgfb->base, &virtio_gpu_fb_funcs);	if (ret) {		vgfb->obj = NULL;		return ret;	} 	spin_lock_init(&vgfb->dirty_lock);	vgfb->x1 = vgfb->y1 = INT_MAX;	vgfb->x2 = vgfb->y2 = 0;	return 0;} static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc){	struct drm_device *dev = crtc->dev;	struct virtio_gpu_device *vgdev = dev->dev_private;	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,				   crtc->mode.hdisplay,				   crtc->mode.vdisplay, 0, 0);} static void virtio_gpu_crtc_enable(struct drm_crtc *crtc){} static void virtio_gpu_crtc_disable(struct drm_crtc *crtc){	struct drm_device *dev = crtc->dev;	struct virtio_gpu_device *vgdev = dev->dev_private;	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc); 	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);} static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,					struct drm_crtc_state *state){	return 0;} static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,					 struct drm_crtc_state *old_state){	unsigned long flags; 	spin_lock_irqsave(&crtc->dev->event_lock, flags);	if (crtc->state->event)		drm_crtc_send_vblank_event(crtc, crtc->state->event);	crtc->state->event = NULL;	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);} static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {	.enable        = virtio_gpu_crtc_enable,	.disable       = virtio_gpu_crtc_disable,	.mode_set_nofb = virtio_gpu_crtc_mode_set_nofb,	.atomic_check  = virtio_gpu_crtc_atomic_check,	.atomic_flush  = virtio_gpu_crtc_atomic_flush,}; static void virtio_gpu_enc_mode_set(struct drm_encoder *encoder,				    struct drm_display_mode *mode,				    struct drm_display_mode *adjusted_mode){} static void virtio_gpu_enc_enable(struct drm_encoder *encoder){} static void virtio_gpu_enc_disable(struct drm_encoder *encoder){} static int virtio_gpu_conn_get_modes(struct drm_connector *connector){	struct virtio_gpu_output *output =		drm_connector_to_virtio_gpu_output(connector);	struct drm_display_mode *mode = NULL;	int count, width, height; 	width  = le32_to_cpu(output->info.r.width);	height = le32_to_cpu(output->info.r.height);	count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX); 	if (width == 0 || height == 0) {		width = XRES_DEF;		height = YRES_DEF;		drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);	} else {		DRM_DEBUG("add mode: %dx%d\n", width, height);		mode = drm_cvt_mode(connector->dev, width, height, 60,				    false, false, false);		mode->type |= DRM_MODE_TYPE_PREFERRED;		drm_mode_probed_add(connector, mode);		count++;	} 	return count;} static int virtio_gpu_conn_mode_valid(struct drm_connector *connector,				      struct drm_display_mode *mode){	struct virtio_gpu_output *output =		drm_connector_to_virtio_gpu_output(connector);	int width, height; 	width  = le32_to_cpu(output->info.r.width);	height = le32_to_cpu(output->info.r.height); 	if (!(mode->type & DRM_MODE_TYPE_PREFERRED))		return MODE_OK;	if (mode->hdisplay == XRES_DEF && mode->vdisplay == YRES_DEF)		return MODE_OK;	if (mode->hdisplay <= width  && mode->hdisplay >= width - 16 &&	    mode->vdisplay <= height && mode->vdisplay >= height - 16)		return MODE_OK; 	DRM_DEBUG("del mode: %dx%d\n", mode->hdisplay, mode->vdisplay);	return MODE_BAD;} static const struct drm_encoder_helper_funcs virtio_gpu_enc_helper_funcs = {	.mode_set   = virtio_gpu_enc_mode_set,	.enable     = virtio_gpu_enc_enable,	.disable    = virtio_gpu_enc_disable,}; static const struct drm_connector_helper_funcs virtio_gpu_conn_helper_funcs = {	.get_modes    = virtio_gpu_conn_get_modes,	.mode_valid   = virtio_gpu_conn_mode_valid,}; static enum drm_connector_status virtio_gpu_conn_detect(			struct drm_connector *connector,			bool force){	struct virtio_gpu_output *output =		drm_connector_to_virtio_gpu_output(connector); 	if (output->info.enabled)		return connector_status_connected;	else		return connector_status_disconnected;} static void virtio_gpu_conn_destroy(struct drm_connector *connector){	struct virtio_gpu_output *virtio_gpu_output =		drm_connector_to_virtio_gpu_output(connector); 	drm_connector_unregister(connector);	drm_connector_cleanup(connector);	kfree(virtio_gpu_output);} static const struct drm_connector_funcs virtio_gpu_connector_funcs = {	.dpms = drm_atomic_helper_connector_dpms,	.detect = virtio_gpu_conn_detect,	.fill_modes = drm_helper_probe_single_connector_modes,	.destroy = virtio_gpu_conn_destroy,	.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 const struct drm_encoder_funcs virtio_gpu_enc_funcs = {	.destroy = drm_encoder_cleanup,}; static int vgdev_output_init(struct virtio_gpu_device *vgdev, int index){	struct drm_device *dev = vgdev->ddev;	struct virtio_gpu_output *output = vgdev->outputs + index;	struct drm_connector *connector = &output->conn;	struct drm_encoder *encoder = &output->enc;	struct drm_crtc *crtc = &output->crtc;	struct drm_plane *primary, *cursor; 	output->index = index;	if (index == 0) {		output->info.enabled = cpu_to_le32(true);		output->info.r.width = cpu_to_le32(XRES_DEF);		output->info.r.height = cpu_to_le32(YRES_DEF);	} 	primary = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_PRIMARY, index);	if (IS_ERR(primary))		return PTR_ERR(primary);	cursor = virtio_gpu_plane_init(vgdev, DRM_PLANE_TYPE_CURSOR, index);	if (IS_ERR(cursor))		return PTR_ERR(cursor);	drm_crtc_init_with_planes(dev, crtc, primary, cursor,				  &virtio_gpu_crtc_funcs, NULL);	drm_crtc_helper_add(crtc, &virtio_gpu_crtc_helper_funcs);	primary->crtc = crtc;	cursor->crtc = crtc; 	drm_connector_init(dev, connector, &virtio_gpu_connector_funcs,			   DRM_MODE_CONNECTOR_VIRTUAL);	drm_connector_helper_add(connector, &virtio_gpu_conn_helper_funcs); 	drm_encoder_init(dev, encoder, &virtio_gpu_enc_funcs,			 DRM_MODE_ENCODER_VIRTUAL, NULL);	drm_encoder_helper_add(encoder, &virtio_gpu_enc_helper_funcs);	encoder->possible_crtcs = 1 << index; 	drm_mode_connector_attach_encoder(connector, encoder);	drm_connector_register(connector);	return 0;} static struct drm_framebuffer *virtio_gpu_user_framebuffer_create(struct drm_device *dev,				   struct drm_file *file_priv,				   const struct drm_mode_fb_cmd2 *mode_cmd){	struct drm_gem_object *obj = NULL;	struct virtio_gpu_framebuffer *virtio_gpu_fb;	int ret; 	/* lookup object associated with res handle */	obj = drm_gem_object_lookup(file_priv, mode_cmd->handles[0]);	if (!obj)		return ERR_PTR(-EINVAL); 	virtio_gpu_fb = kzalloc(sizeof(*virtio_gpu_fb), GFP_KERNEL);	if (virtio_gpu_fb == NULL)		return ERR_PTR(-ENOMEM); 	ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);	if (ret) {		kfree(virtio_gpu_fb);		drm_gem_object_unreference_unlocked(obj);		return NULL;	} 	return &virtio_gpu_fb->base;} static void vgdev_atomic_commit_tail(struct drm_atomic_state *state){	struct drm_device *dev = state->dev; 	drm_atomic_helper_commit_modeset_disables(dev, state);	drm_atomic_helper_commit_modeset_enables(dev, state);	drm_atomic_helper_commit_planes(dev, state, 0); 	drm_atomic_helper_commit_hw_done(state); 	drm_atomic_helper_wait_for_vblanks(dev, state);	drm_atomic_helper_cleanup_planes(dev, state);} static const struct drm_mode_config_helper_funcs virtio_mode_config_helpers = {	.atomic_commit_tail = vgdev_atomic_commit_tail,}; static const struct drm_mode_config_funcs virtio_gpu_mode_funcs = {	.fb_create = virtio_gpu_user_framebuffer_create,	.atomic_check = drm_atomic_helper_check,	.atomic_commit = drm_atomic_helper_commit,}; int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev){	int i; 	drm_mode_config_init(vgdev->ddev);	vgdev->ddev->mode_config.funcs = &virtio_gpu_mode_funcs;	vgdev->ddev->mode_config.helper_private = &virtio_mode_config_helpers; 	/* modes will be validated against the framebuffer size */	vgdev->ddev->mode_config.min_width = XRES_MIN;	vgdev->ddev->mode_config.min_height = YRES_MIN;	vgdev->ddev->mode_config.max_width = XRES_MAX;	vgdev->ddev->mode_config.max_height = YRES_MAX; 	for (i = 0 ; i < vgdev->num_scanouts; ++i)		vgdev_output_init(vgdev, i);         drm_mode_config_reset(vgdev->ddev);	return 0;} void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev){	virtio_gpu_fbdev_fini(vgdev);	drm_mode_config_cleanup(vgdev->ddev);}