[mirror_ubuntu-hirsute-kernel.git] / drivers / gpu / drm / vmwgfx / vmwgfx_scrn.c

/**************************************************************************
 *
 * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA
 * All Rights Reserved.
 *
 * 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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 "vmwgfx_kms.h"


#define vmw_crtc_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.crtc)
#define vmw_encoder_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.encoder)
#define vmw_connector_to_sou(x) \
	container_of(x, struct vmw_screen_object_unit, base.connector)

struct vmw_screen_object_display {
	unsigned num_active;

	struct vmw_framebuffer *fb;
};

/**
 * Display unit using screen objects.
 */
struct vmw_screen_object_unit {
	struct vmw_display_unit base;

	unsigned long buffer_size; /**< Size of allocated buffer */
	struct vmw_dma_buffer *buffer; /**< Backing store buffer */

	bool defined;
	bool active;
};

static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
{
	vmw_display_unit_cleanup(&sou->base);
	kfree(sou);
}


/*
 * Screen Object Display Unit CRTC functions
 */

static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
{
	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
}

static void vmw_sou_del_active(struct vmw_private *vmw_priv,
			      struct vmw_screen_object_unit *sou)
{
	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;

	if (sou->active) {
		if (--(ld->num_active) == 0)
			ld->fb = NULL;
		sou->active = false;
	}
}

static void vmw_sou_add_active(struct vmw_private *vmw_priv,
			      struct vmw_screen_object_unit *sou,
			      struct vmw_framebuffer *vfb)
{
	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;

	BUG_ON(!ld->num_active && ld->fb);

	if (!sou->active) {
		ld->fb = vfb;
		sou->active = true;
		ld->num_active++;
	}
}

/**
 * Send the fifo command to create a screen.
 */
static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
			       struct vmw_screen_object_unit *sou,
			       uint32_t x, uint32_t y,
			       struct drm_display_mode *mode)
{
	size_t fifo_size;

	struct {
		struct {
			uint32_t cmdType;
		} header;
		SVGAScreenObject obj;
	} *cmd;

	BUG_ON(!sou->buffer);

	fifo_size = sizeof(*cmd);
	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	/* The hardware has hung, nothing we can do about it here. */
	if (unlikely(cmd == NULL)) {
		DRM_ERROR("Fifo reserve failed.\n");
		return -ENOMEM;
	}

	memset(cmd, 0, fifo_size);
	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
	cmd->obj.structSize = sizeof(SVGAScreenObject);
	cmd->obj.id = sou->base.unit;
	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT |
		(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
	cmd->obj.size.width = mode->hdisplay;
	cmd->obj.size.height = mode->vdisplay;
	cmd->obj.root.x = x;
	cmd->obj.root.y = y;

	/* Ok to assume that buffer is pinned in vram */
	vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
	cmd->obj.backingStore.pitch = mode->hdisplay * 4;

	vmw_fifo_commit(dev_priv, fifo_size);

	sou->defined = true;

	return 0;
}

/**
 * Send the fifo command to destroy a screen.
 */
static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
				struct vmw_screen_object_unit *sou)
{
	size_t fifo_size;
	int ret;

	struct {
		struct {
			uint32_t cmdType;
		} header;
		SVGAFifoCmdDestroyScreen body;
	} *cmd;

	/* no need to do anything */
	if (unlikely(!sou->defined))
		return 0;

	fifo_size = sizeof(*cmd);
	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	/* the hardware has hung, nothing we can do about it here */
	if (unlikely(cmd == NULL)) {
		DRM_ERROR("Fifo reserve failed.\n");
		return -ENOMEM;
	}

	memset(cmd, 0, fifo_size);
	cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
	cmd->body.screenId = sou->base.unit;

	vmw_fifo_commit(dev_priv, fifo_size);

	/* Force sync */
	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
	if (unlikely(ret != 0))
		DRM_ERROR("Failed to sync with HW");
	else
		sou->defined = false;

	return ret;
}

/**
 * Free the backing store.
 */
static void vmw_sou_backing_free(struct vmw_private *dev_priv,
				 struct vmw_screen_object_unit *sou)
{
	struct ttm_buffer_object *bo;

	if (unlikely(sou->buffer == NULL))
		return;

	bo = &sou->buffer->base;
	ttm_bo_unref(&bo);
	sou->buffer = NULL;
	sou->buffer_size = 0;
}

/**
 * Allocate the backing store for the buffer.
 */
static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
				 struct vmw_screen_object_unit *sou,
				 unsigned long size)
{
	int ret;

	if (sou->buffer_size == size)
		return 0;

	if (sou->buffer)
		vmw_sou_backing_free(dev_priv, sou);

	sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
	if (unlikely(sou->buffer == NULL))
		return -ENOMEM;

	/* After we have alloced the backing store might not be able to
	 * resume the overlays, this is preferred to failing to alloc.
	 */
	vmw_overlay_pause_all(dev_priv);
	ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
			      &vmw_vram_ne_placement,
			      false, &vmw_dmabuf_bo_free);
	vmw_overlay_resume_all(dev_priv);

	if (unlikely(ret != 0))
		sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
	else
		sou->buffer_size = size;

	return ret;
}

static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
{
	struct vmw_private *dev_priv;
	struct vmw_screen_object_unit *sou;
	struct drm_connector *connector;
	struct drm_display_mode *mode;
	struct drm_encoder *encoder;
	struct vmw_framebuffer *vfb;
	struct drm_framebuffer *fb;
	struct drm_crtc *crtc;
	int ret = 0;

	if (!set)
		return -EINVAL;

	if (!set->crtc)
		return -EINVAL;

	/* get the sou */
	crtc = set->crtc;
	sou = vmw_crtc_to_sou(crtc);
	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
	dev_priv = vmw_priv(crtc->dev);

	if (set->num_connectors > 1) {
		DRM_ERROR("to many connectors\n");
		return -EINVAL;
	}

	if (set->num_connectors == 1 &&
	    set->connectors[0] != &sou->base.connector) {
		DRM_ERROR("connector doesn't match %p %p\n",
			set->connectors[0], &sou->base.connector);
		return -EINVAL;
	}

	/* sou only supports one fb active at the time */
	if (dev_priv->sou_priv->fb && vfb &&
	    !(dev_priv->sou_priv->num_active == 1 &&
	      sou->active) &&
	    dev_priv->sou_priv->fb != vfb) {
		DRM_ERROR("Multiple framebuffers not supported\n");
		return -EINVAL;
	}

	/* since they always map one to one these are safe */
	connector = &sou->base.connector;
	encoder = &sou->base.encoder;

	/* should we turn the crtc off */
	if (set->num_connectors == 0 || !set->mode || !set->fb) {
		ret = vmw_sou_fifo_destroy(dev_priv, sou);
		/* the hardware has hung don't do anything more */
		if (unlikely(ret != 0))
			return ret;

		connector->encoder = NULL;
		encoder->crtc = NULL;
		crtc->fb = NULL;
		crtc->x = 0;
		crtc->y = 0;

		vmw_sou_del_active(dev_priv, sou);

		vmw_sou_backing_free(dev_priv, sou);

		return 0;
	}


	/* we now know we want to set a mode */
	mode = set->mode;
	fb = set->fb;

	if (set->x + mode->hdisplay > fb->width ||
	    set->y + mode->vdisplay > fb->height) {
		DRM_ERROR("set outside of framebuffer\n");
		return -EINVAL;
	}

	vmw_fb_off(dev_priv);

	if (mode->hdisplay != crtc->mode.hdisplay ||
	    mode->vdisplay != crtc->mode.vdisplay) {
		/* no need to check if depth is different, because backing
		 * store depth is forced to 4 by the device.
		 */

		ret = vmw_sou_fifo_destroy(dev_priv, sou);
		/* the hardware has hung don't do anything more */
		if (unlikely(ret != 0))
			return ret;

		vmw_sou_backing_free(dev_priv, sou);
	}

	if (!sou->buffer) {
		/* forced to depth 4 by the device */
		size_t size = mode->hdisplay * mode->vdisplay * 4;
		ret = vmw_sou_backing_alloc(dev_priv, sou, size);
		if (unlikely(ret != 0))
			return ret;
	}

	ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
	if (unlikely(ret != 0)) {
		/*
		 * We are in a bit of a situation here, the hardware has
		 * hung and we may or may not have a buffer hanging of
		 * the screen object, best thing to do is not do anything
		 * if we where defined, if not just turn the crtc of.
		 * Not what userspace wants but it needs to htfu.
		 */
		if (sou->defined)
			return ret;

		connector->encoder = NULL;
		encoder->crtc = NULL;
		crtc->fb = NULL;
		crtc->x = 0;
		crtc->y = 0;

		return ret;
	}

	vmw_sou_add_active(dev_priv, sou, vfb);

	connector->encoder = encoder;
	encoder->crtc = crtc;
	crtc->mode = *mode;
	crtc->fb = fb;
	crtc->x = set->x;
	crtc->y = set->y;

	return 0;
}

static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
	.save = vmw_du_crtc_save,
	.restore = vmw_du_crtc_restore,
	.cursor_set = vmw_du_crtc_cursor_set,
	.cursor_move = vmw_du_crtc_cursor_move,
	.gamma_set = vmw_du_crtc_gamma_set,
	.destroy = vmw_sou_crtc_destroy,
	.set_config = vmw_sou_crtc_set_config,
};

/*
 * Screen Object Display Unit encoder functions
 */

static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
{
	vmw_sou_destroy(vmw_encoder_to_sou(encoder));
}

static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
	.destroy = vmw_sou_encoder_destroy,
};

/*
 * Screen Object Display Unit connector functions
 */

static void vmw_sou_connector_destroy(struct drm_connector *connector)
{
	vmw_sou_destroy(vmw_connector_to_sou(connector));
}

static struct drm_connector_funcs vmw_legacy_connector_funcs = {
	.dpms = vmw_du_connector_dpms,
	.save = vmw_du_connector_save,
	.restore = vmw_du_connector_restore,
	.detect = vmw_du_connector_detect,
	.fill_modes = vmw_du_connector_fill_modes,
	.set_property = vmw_du_connector_set_property,
	.destroy = vmw_sou_connector_destroy,
};

static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
{
	struct vmw_screen_object_unit *sou;
	struct drm_device *dev = dev_priv->dev;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_crtc *crtc;

	sou = kzalloc(sizeof(*sou), GFP_KERNEL);
	if (!sou)
		return -ENOMEM;

	sou->base.unit = unit;
	crtc = &sou->base.crtc;
	encoder = &sou->base.encoder;
	connector = &sou->base.connector;

	sou->active = false;

	sou->base.pref_active = (unit == 0);
	sou->base.pref_width = 800;
	sou->base.pref_height = 600;
	sou->base.pref_mode = NULL;

	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
			   DRM_MODE_CONNECTOR_VIRTUAL);
	connector->status = vmw_du_connector_detect(connector, true);

	drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
			 DRM_MODE_ENCODER_VIRTUAL);
	drm_mode_connector_attach_encoder(connector, encoder);
	encoder->possible_crtcs = (1 << unit);
	encoder->possible_clones = 0;

	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);

	drm_mode_crtc_set_gamma_size(crtc, 256);

	drm_connector_attach_property(connector,
				      dev->mode_config.dirty_info_property,
				      1);

	return 0;
}

int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
{
	struct drm_device *dev = dev_priv->dev;
	int i, ret;

	if (dev_priv->sou_priv) {
		DRM_INFO("sou system already on\n");
		return -EINVAL;
	}

	if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
		DRM_INFO("Not using screen objects,"
			 " missing cap SCREEN_OBJECT_2\n");
		return -ENOSYS;
	}

	ret = -ENOMEM;
	dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
	if (unlikely(!dev_priv->sou_priv))
		goto err_no_mem;

	dev_priv->sou_priv->num_active = 0;
	dev_priv->sou_priv->fb = NULL;

	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
	if (unlikely(ret != 0))
		goto err_free;

	ret = drm_mode_create_dirty_info_property(dev);
	if (unlikely(ret != 0))
		goto err_vblank_cleanup;

	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
		vmw_sou_init(dev_priv, i);

	DRM_INFO("Screen objects system initialized\n");

	return 0;

err_vblank_cleanup:
	drm_vblank_cleanup(dev);
err_free:
	kfree(dev_priv->sou_priv);
	dev_priv->sou_priv = NULL;
err_no_mem:
	return ret;
}

int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
{
	struct drm_device *dev = dev_priv->dev;

	if (!dev_priv->sou_priv)
		return -ENOSYS;

	drm_vblank_cleanup(dev);

	if (dev_priv->sou_priv->num_active > 0)
		DRM_ERROR("Still have active outputs when unloading driver");

	kfree(dev_priv->sou_priv);

	return 0;
}
Commit	Line	Data
56d1c78d JB	1	/**************************************************************************
	2	*
	3	* Copyright © 2011 VMware, Inc., Palo Alto, CA., USA
	4	* All Rights Reserved.
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the
	8	* "Software"), to deal in the Software without restriction, including
	9	* without limitation the rights to use, copy, modify, merge, publish,
	10	* distribute, sub license, and/or sell copies of the Software, and to
	11	* permit persons to whom the Software is furnished to do so, subject to
	12	* the following conditions:
	13	*
	14	* The above copyright notice and this permission notice (including the
	15	* next paragraph) shall be included in all copies or substantial portions
	16	* of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
	21	* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
	22	* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	23	* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	24	* USE OR OTHER DEALINGS IN THE SOFTWARE.
	25	*
	26	**************************************************************************/
	27
	28	#include "vmwgfx_kms.h"
	29
	30
	31	#define vmw_crtc_to_sou(x) \
	32	container_of(x, struct vmw_screen_object_unit, base.crtc)
	33	#define vmw_encoder_to_sou(x) \
	34	container_of(x, struct vmw_screen_object_unit, base.encoder)
	35	#define vmw_connector_to_sou(x) \
	36	container_of(x, struct vmw_screen_object_unit, base.connector)
	37
	38	struct vmw_screen_object_display {
56d1c78d	39	unsigned num_active;
56d1c78d JB	40
	41	struct vmw_framebuffer *fb;
	42	};
	43
	44	/**
	45	* Display unit using screen objects.
	46	*/
	47	struct vmw_screen_object_unit {
	48	struct vmw_display_unit base;
	49
	50	unsigned long buffer_size; /*< Size of allocated buffer /
	51	struct vmw_dma_buffer buffer; /< Backing store buffer /
	52
	53	bool defined;
0e708bc5	54	bool active;
56d1c78d JB	55	};
	56
	57	static void vmw_sou_destroy(struct vmw_screen_object_unit *sou)
	58	{
56d1c78d JB	59	vmw_display_unit_cleanup(&sou->base);
	60	kfree(sou);
	61	}
	62
	63
	64	/*
	65	* Screen Object Display Unit CRTC functions
	66	*/
	67
	68	static void vmw_sou_crtc_destroy(struct drm_crtc *crtc)
	69	{
	70	vmw_sou_destroy(vmw_crtc_to_sou(crtc));
	71	}
	72
0e708bc5	73	static void vmw_sou_del_active(struct vmw_private *vmw_priv,
56d1c78d JB	74	struct vmw_screen_object_unit *sou)
	75	{
	76	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d	77
0e708bc5 TH	78	if (sou->active) {
	79	if (--(ld->num_active) == 0)
	80	ld->fb = NULL;
	81	sou->active = false;
	82	}
56d1c78d JB	83	}
56d1c78d JB	84
0e708bc5	85	static void vmw_sou_add_active(struct vmw_private *vmw_priv,
56d1c78d JB	86	struct vmw_screen_object_unit *sou,
	87	struct vmw_framebuffer *vfb)
	88	{
	89	struct vmw_screen_object_display *ld = vmw_priv->sou_priv;
56d1c78d JB	90
56d1c78d JB	91	BUG_ON(!ld->num_active && ld->fb);
56d1c78d	92
0e708bc5 TH	93	if (!sou->active) {
	94	ld->fb = vfb;
	95	sou->active = true;
	96	ld->num_active++;
56d1c78d	97	}
56d1c78d JB	98	}
	99
	100	/**
	101	* Send the fifo command to create a screen.
	102	*/
	103	static int vmw_sou_fifo_create(struct vmw_private *dev_priv,
	104	struct vmw_screen_object_unit *sou,
	105	uint32_t x, uint32_t y,
	106	struct drm_display_mode *mode)
	107	{
	108	size_t fifo_size;
	109
	110	struct {
	111	struct {
	112	uint32_t cmdType;
	113	} header;
	114	SVGAScreenObject obj;
	115	} *cmd;
	116
	117	BUG_ON(!sou->buffer);
	118
	119	fifo_size = sizeof(*cmd);
	120	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	121	/* The hardware has hung, nothing we can do about it here. */
	122	if (unlikely(cmd == NULL)) {
	123	DRM_ERROR("Fifo reserve failed.\n");
	124	return -ENOMEM;
	125	}
	126
	127	memset(cmd, 0, fifo_size);
	128	cmd->header.cmdType = SVGA_CMD_DEFINE_SCREEN;
	129	cmd->obj.structSize = sizeof(SVGAScreenObject);
	130	cmd->obj.id = sou->base.unit;
	131	cmd->obj.flags = SVGA_SCREEN_HAS_ROOT \|
	132	(sou->base.unit == 0 ? SVGA_SCREEN_IS_PRIMARY : 0);
	133	cmd->obj.size.width = mode->hdisplay;
	134	cmd->obj.size.height = mode->vdisplay;
	135	cmd->obj.root.x = x;
	136	cmd->obj.root.y = y;
	137
	138	/* Ok to assume that buffer is pinned in vram */
b37a6b9a	139	vmw_bo_get_guest_ptr(&sou->buffer->base, &cmd->obj.backingStore.ptr);
56d1c78d JB	140	cmd->obj.backingStore.pitch = mode->hdisplay * 4;
	141
	142	vmw_fifo_commit(dev_priv, fifo_size);
	143
	144	sou->defined = true;
	145
	146	return 0;
	147	}
	148
	149	/**
	150	* Send the fifo command to destroy a screen.
	151	*/
	152	static int vmw_sou_fifo_destroy(struct vmw_private *dev_priv,
	153	struct vmw_screen_object_unit *sou)
	154	{
	155	size_t fifo_size;
	156	int ret;
	157
	158	struct {
	159	struct {
	160	uint32_t cmdType;
	161	} header;
	162	SVGAFifoCmdDestroyScreen body;
	163	} *cmd;
	164
	165	/* no need to do anything */
	166	if (unlikely(!sou->defined))
	167	return 0;
	168
	169	fifo_size = sizeof(*cmd);
	170	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
	171	/* the hardware has hung, nothing we can do about it here */
	172	if (unlikely(cmd == NULL)) {
	173	DRM_ERROR("Fifo reserve failed.\n");
	174	return -ENOMEM;
	175	}
	176
	177	memset(cmd, 0, fifo_size);
	178	cmd->header.cmdType = SVGA_CMD_DESTROY_SCREEN;
	179	cmd->body.screenId = sou->base.unit;
	180
	181	vmw_fifo_commit(dev_priv, fifo_size);
	182
	183	/* Force sync */
	184	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
	185	if (unlikely(ret != 0))
	186	DRM_ERROR("Failed to sync with HW");
	187	else
	188	sou->defined = false;
	189
	190	return ret;
	191	}
	192
	193	/**
	194	* Free the backing store.
	195	*/
	196	static void vmw_sou_backing_free(struct vmw_private *dev_priv,
	197	struct vmw_screen_object_unit *sou)
	198	{
	199	struct ttm_buffer_object *bo;
	200
	201	if (unlikely(sou->buffer == NULL))
	202	return;
	203
204	bo = &sou->buffer->base;
205	ttm_bo_unref(&bo);
206	sou->buffer = NULL;
207	sou->buffer_size = 0;
208	}
209
210	/**
211	* Allocate the backing store for the buffer.
212	*/
213	static int vmw_sou_backing_alloc(struct vmw_private *dev_priv,
214	struct vmw_screen_object_unit *sou,
215	unsigned long size)
216	{
217	int ret;
218
219	if (sou->buffer_size == size)
220	return 0;
221
222	if (sou->buffer)
223	vmw_sou_backing_free(dev_priv, sou);
224
225	sou->buffer = kzalloc(sizeof(*sou->buffer), GFP_KERNEL);
226	if (unlikely(sou->buffer == NULL))
227	return -ENOMEM;
228
229	/* After we have alloced the backing store might not be able to
230	* resume the overlays, this is preferred to failing to alloc.
231	*/
232	vmw_overlay_pause_all(dev_priv);
233	ret = vmw_dmabuf_init(dev_priv, sou->buffer, size,
234	&vmw_vram_ne_placement,
235	false, &vmw_dmabuf_bo_free);
236	vmw_overlay_resume_all(dev_priv);
237
238	if (unlikely(ret != 0))
239	sou->buffer = NULL; /* vmw_dmabuf_init frees on error */
240	else
241	sou->buffer_size = size;
242
243	return ret;
244	}
245
246	static int vmw_sou_crtc_set_config(struct drm_mode_set *set)
247	{
248	struct vmw_private *dev_priv;
249	struct vmw_screen_object_unit *sou;
250	struct drm_connector *connector;
251	struct drm_display_mode *mode;
252	struct drm_encoder *encoder;
253	struct vmw_framebuffer *vfb;
254	struct drm_framebuffer *fb;
255	struct drm_crtc *crtc;
256	int ret = 0;
257
258	if (!set)
259	return -EINVAL;
260
261	if (!set->crtc)
262	return -EINVAL;
263
264	/* get the sou */
265	crtc = set->crtc;
266	sou = vmw_crtc_to_sou(crtc);
267	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
268	dev_priv = vmw_priv(crtc->dev);
269
270	if (set->num_connectors > 1) {
271	DRM_ERROR("to many connectors\n");
272	return -EINVAL;
273	}
274
275	if (set->num_connectors == 1 &&
276	set->connectors[0] != &sou->base.connector) {
277	DRM_ERROR("connector doesn't match %p %p\n",
278	set->connectors[0], &sou->base.connector);
279	return -EINVAL;
280	}
281
282	/* sou only supports one fb active at the time */
283	if (dev_priv->sou_priv->fb && vfb &&
284	!(dev_priv->sou_priv->num_active == 1 &&
0e708bc5	285	sou->active) &&
56d1c78d JB	286	dev_priv->sou_priv->fb != vfb) {
	287	DRM_ERROR("Multiple framebuffers not supported\n");
	288	return -EINVAL;
	289	}
	290
	291	/* since they always map one to one these are safe */
	292	connector = &sou->base.connector;
	293	encoder = &sou->base.encoder;
	294
	295	/* should we turn the crtc off */
	296	if (set->num_connectors == 0 \|\| !set->mode \|\| !set->fb) {
	297	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	298	/* the hardware has hung don't do anything more */
	299	if (unlikely(ret != 0))
	300	return ret;
	301
	302	connector->encoder = NULL;
	303	encoder->crtc = NULL;
	304	crtc->fb = NULL;
	305	crtc->x = 0;
	306	crtc->y = 0;
	307
	308	vmw_sou_del_active(dev_priv, sou);
	309
	310	vmw_sou_backing_free(dev_priv, sou);
	311
	312	return 0;
	313	}
	314
	315
	316	/* we now know we want to set a mode */
	317	mode = set->mode;
	318	fb = set->fb;
	319
	320	if (set->x + mode->hdisplay > fb->width \|\|
	321	set->y + mode->vdisplay > fb->height) {
	322	DRM_ERROR("set outside of framebuffer\n");
	323	return -EINVAL;
	324	}
	325
	326	vmw_fb_off(dev_priv);
	327
	328	if (mode->hdisplay != crtc->mode.hdisplay \|\|
	329	mode->vdisplay != crtc->mode.vdisplay) {
	330	/* no need to check if depth is different, because backing
	331	* store depth is forced to 4 by the device.
	332	*/
	333
	334	ret = vmw_sou_fifo_destroy(dev_priv, sou);
	335	/* the hardware has hung don't do anything more */
	336	if (unlikely(ret != 0))
	337	return ret;
	338
	339	vmw_sou_backing_free(dev_priv, sou);
	340	}
	341
	342	if (!sou->buffer) {
	343	/* forced to depth 4 by the device */
	344	size_t size = mode->hdisplay * mode->vdisplay * 4;
	345	ret = vmw_sou_backing_alloc(dev_priv, sou, size);
	346	if (unlikely(ret != 0))
	347	return ret;
	348	}
	349
350	ret = vmw_sou_fifo_create(dev_priv, sou, set->x, set->y, mode);
351	if (unlikely(ret != 0)) {
352	/*
353	* We are in a bit of a situation here, the hardware has
354	* hung and we may or may not have a buffer hanging of
355	* the screen object, best thing to do is not do anything
356	* if we where defined, if not just turn the crtc of.
357	* Not what userspace wants but it needs to htfu.
358	*/
359	if (sou->defined)
360	return ret;
361
362	connector->encoder = NULL;
363	encoder->crtc = NULL;
364	crtc->fb = NULL;
365	crtc->x = 0;
366	crtc->y = 0;
367
368	return ret;
369	}
370
371	vmw_sou_add_active(dev_priv, sou, vfb);
372
373	connector->encoder = encoder;
374	encoder->crtc = crtc;
375	crtc->mode = *mode;
376	crtc->fb = fb;
377	crtc->x = set->x;
378	crtc->y = set->y;
379
380	return 0;
381	}
382
383	static struct drm_crtc_funcs vmw_screen_object_crtc_funcs = {
384	.save = vmw_du_crtc_save,
385	.restore = vmw_du_crtc_restore,
386	.cursor_set = vmw_du_crtc_cursor_set,
387	.cursor_move = vmw_du_crtc_cursor_move,
388	.gamma_set = vmw_du_crtc_gamma_set,
389	.destroy = vmw_sou_crtc_destroy,
390	.set_config = vmw_sou_crtc_set_config,
391	};
392
393	/*
394	* Screen Object Display Unit encoder functions
395	*/
396
397	static void vmw_sou_encoder_destroy(struct drm_encoder *encoder)
398	{
399	vmw_sou_destroy(vmw_encoder_to_sou(encoder));
400	}
401
402	static struct drm_encoder_funcs vmw_screen_object_encoder_funcs = {
403	.destroy = vmw_sou_encoder_destroy,
404	};
405
406	/*
407	* Screen Object Display Unit connector functions
408	*/
409
410	static void vmw_sou_connector_destroy(struct drm_connector *connector)
411	{
412	vmw_sou_destroy(vmw_connector_to_sou(connector));
413	}
414
415	static struct drm_connector_funcs vmw_legacy_connector_funcs = {
416	.dpms = vmw_du_connector_dpms,
417	.save = vmw_du_connector_save,
418	.restore = vmw_du_connector_restore,
419	.detect = vmw_du_connector_detect,
420	.fill_modes = vmw_du_connector_fill_modes,
421	.set_property = vmw_du_connector_set_property,
422	.destroy = vmw_sou_connector_destroy,
423	};
424
425	static int vmw_sou_init(struct vmw_private *dev_priv, unsigned unit)
426	{
427	struct vmw_screen_object_unit *sou;
428	struct drm_device *dev = dev_priv->dev;
429	struct drm_connector *connector;
430	struct drm_encoder *encoder;
431	struct drm_crtc *crtc;
432
433	sou = kzalloc(sizeof(*sou), GFP_KERNEL);
434	if (!sou)
435	return -ENOMEM;
436
437	sou->base.unit = unit;
438	crtc = &sou->base.crtc;
439	encoder = &sou->base.encoder;
440	connector = &sou->base.connector;
441
0e708bc5	442	sou->active = false;
56d1c78d JB	443
	444	sou->base.pref_active = (unit == 0);
	445	sou->base.pref_width = 800;
	446	sou->base.pref_height = 600;
	447	sou->base.pref_mode = NULL;
	448
	449	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
305151e3	450	DRM_MODE_CONNECTOR_VIRTUAL);
56d1c78d JB	451	connector->status = vmw_du_connector_detect(connector, true);
	452
	453	drm_encoder_init(dev, encoder, &vmw_screen_object_encoder_funcs,
305151e3	454	DRM_MODE_ENCODER_VIRTUAL);
56d1c78d JB	455	drm_mode_connector_attach_encoder(connector, encoder);
	456	encoder->possible_crtcs = (1 << unit);
	457	encoder->possible_clones = 0;
	458
	459	drm_crtc_init(dev, crtc, &vmw_screen_object_crtc_funcs);
	460
	461	drm_mode_crtc_set_gamma_size(crtc, 256);
	462
	463	drm_connector_attach_property(connector,
	464	dev->mode_config.dirty_info_property,
	465	1);
	466
	467	return 0;
	468	}
	469
	470	int vmw_kms_init_screen_object_display(struct vmw_private *dev_priv)
	471	{
	472	struct drm_device *dev = dev_priv->dev;
74b5ea30	473	int i, ret;
56d1c78d JB	474
	475	if (dev_priv->sou_priv) {
	476	DRM_INFO("sou system already on\n");
	477	return -EINVAL;
	478	}
	479
	480	if (!(dev_priv->fifo.capabilities & SVGA_FIFO_CAP_SCREEN_OBJECT_2)) {
	481	DRM_INFO("Not using screen objects,"
	482	" missing cap SCREEN_OBJECT_2\n");
	483	return -ENOSYS;
	484	}
	485
	486	ret = -ENOMEM;
	487	dev_priv->sou_priv = kmalloc(sizeof(*dev_priv->sou_priv), GFP_KERNEL);
	488	if (unlikely(!dev_priv->sou_priv))
	489	goto err_no_mem;
	490
56d1c78d	491	dev_priv->sou_priv->num_active = 0;
56d1c78d JB	492	dev_priv->sou_priv->fb = NULL;
	493
	494	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
	495	if (unlikely(ret != 0))
	496	goto err_free;
	497
74b5ea30	498	ret = drm_mode_create_dirty_info_property(dev);
56d1c78d JB	499	if (unlikely(ret != 0))
	500	goto err_vblank_cleanup;
	501
	502	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
	503	vmw_sou_init(dev_priv, i);
	504
	505	DRM_INFO("Screen objects system initialized\n");
	506
	507	return 0;
	508
	509	err_vblank_cleanup:
	510	drm_vblank_cleanup(dev);
	511	err_free:
	512	kfree(dev_priv->sou_priv);
60a16a30	513	dev_priv->sou_priv = NULL;
56d1c78d JB	514	err_no_mem:
	515	return ret;
	516	}
	517
	518	int vmw_kms_close_screen_object_display(struct vmw_private *dev_priv)
	519	{
	520	struct drm_device *dev = dev_priv->dev;
	521
56d1c78d JB	522	if (!dev_priv->sou_priv)
	523	return -ENOSYS;
	524
60a16a30 JB	525	drm_vblank_cleanup(dev);
60a16a30 JB	526
0e708bc5	527	if (dev_priv->sou_priv->num_active > 0)
56d1c78d JB	528	DRM_ERROR("Still have active outputs when unloading driver");
	529
	530	kfree(dev_priv->sou_priv);
	531
	532	return 0;
	533	}