Home | History | Annotate | Line # | Download | only in vmwgfx
vmwgfx_ldu.c revision 1.1.1.2
      1 /**************************************************************************
      2  *
      3  * Copyright  2009 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_ldu(x) \
     32 	container_of(x, struct vmw_legacy_display_unit, base.crtc)
     33 #define vmw_encoder_to_ldu(x) \
     34 	container_of(x, struct vmw_legacy_display_unit, base.encoder)
     35 #define vmw_connector_to_ldu(x) \
     36 	container_of(x, struct vmw_legacy_display_unit, base.connector)
     37 
     38 struct vmw_legacy_display {
     39 	struct list_head active;
     40 
     41 	unsigned num_active;
     42 	unsigned last_num_active;
     43 
     44 	struct vmw_framebuffer *fb;
     45 };
     46 
     47 /**
     48  * Display unit using the legacy register interface.
     49  */
     50 struct vmw_legacy_display_unit {
     51 	struct vmw_display_unit base;
     52 
     53 	struct list_head active;
     54 };
     55 
     56 static void vmw_ldu_destroy(struct vmw_legacy_display_unit *ldu)
     57 {
     58 	list_del_init(&ldu->active);
     59 	vmw_display_unit_cleanup(&ldu->base);
     60 	kfree(ldu);
     61 }
     62 
     63 
     64 /*
     65  * Legacy Display Unit CRTC functions
     66  */
     67 
     68 static void vmw_ldu_crtc_destroy(struct drm_crtc *crtc)
     69 {
     70 	vmw_ldu_destroy(vmw_crtc_to_ldu(crtc));
     71 }
     72 
     73 static int vmw_ldu_commit_list(struct vmw_private *dev_priv)
     74 {
     75 	struct vmw_legacy_display *lds = dev_priv->ldu_priv;
     76 	struct vmw_legacy_display_unit *entry;
     77 	struct vmw_display_unit *du = NULL;
     78 	struct drm_framebuffer *fb = NULL;
     79 	struct drm_crtc *crtc = NULL;
     80 	int i = 0, ret;
     81 
     82 	/* If there is no display topology the host just assumes
     83 	 * that the guest will set the same layout as the host.
     84 	 */
     85 	if (!(dev_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY)) {
     86 		int w = 0, h = 0;
     87 		list_for_each_entry(entry, &lds->active, active) {
     88 			crtc = &entry->base.crtc;
     89 			w = max(w, crtc->x + crtc->mode.hdisplay);
     90 			h = max(h, crtc->y + crtc->mode.vdisplay);
     91 			i++;
     92 		}
     93 
     94 		if (crtc == NULL)
     95 			return 0;
     96 		fb = entry->base.crtc.primary->fb;
     97 
     98 		return vmw_kms_write_svga(dev_priv, w, h, fb->pitches[0],
     99 					  fb->bits_per_pixel, fb->depth);
    100 	}
    101 
    102 	if (!list_empty(&lds->active)) {
    103 		entry = list_entry(lds->active.next, typeof(*entry), active);
    104 		fb = entry->base.crtc.primary->fb;
    105 
    106 		vmw_kms_write_svga(dev_priv, fb->width, fb->height, fb->pitches[0],
    107 				   fb->bits_per_pixel, fb->depth);
    108 	}
    109 
    110 	/* Make sure we always show something. */
    111 	vmw_write(dev_priv, SVGA_REG_NUM_GUEST_DISPLAYS,
    112 		  lds->num_active ? lds->num_active : 1);
    113 
    114 	i = 0;
    115 	list_for_each_entry(entry, &lds->active, active) {
    116 		crtc = &entry->base.crtc;
    117 
    118 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, i);
    119 		vmw_write(dev_priv, SVGA_REG_DISPLAY_IS_PRIMARY, !i);
    120 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_X, crtc->x);
    121 		vmw_write(dev_priv, SVGA_REG_DISPLAY_POSITION_Y, crtc->y);
    122 		vmw_write(dev_priv, SVGA_REG_DISPLAY_WIDTH, crtc->mode.hdisplay);
    123 		vmw_write(dev_priv, SVGA_REG_DISPLAY_HEIGHT, crtc->mode.vdisplay);
    124 		vmw_write(dev_priv, SVGA_REG_DISPLAY_ID, SVGA_ID_INVALID);
    125 
    126 		i++;
    127 	}
    128 
    129 	BUG_ON(i != lds->num_active);
    130 
    131 	lds->last_num_active = lds->num_active;
    132 
    133 
    134 	/* Find the first du with a cursor. */
    135 	list_for_each_entry(entry, &lds->active, active) {
    136 		du = &entry->base;
    137 
    138 		if (!du->cursor_dmabuf)
    139 			continue;
    140 
    141 		ret = vmw_cursor_update_dmabuf(dev_priv,
    142 					       du->cursor_dmabuf,
    143 					       64, 64,
    144 					       du->hotspot_x,
    145 					       du->hotspot_y);
    146 		if (ret == 0)
    147 			break;
    148 
    149 		DRM_ERROR("Could not update cursor image\n");
    150 	}
    151 
    152 	return 0;
    153 }
    154 
    155 static int vmw_ldu_del_active(struct vmw_private *vmw_priv,
    156 			      struct vmw_legacy_display_unit *ldu)
    157 {
    158 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
    159 	if (list_empty(&ldu->active))
    160 		return 0;
    161 
    162 	/* Must init otherwise list_empty(&ldu->active) will not work. */
    163 	list_del_init(&ldu->active);
    164 	if (--(ld->num_active) == 0) {
    165 		BUG_ON(!ld->fb);
    166 		if (ld->fb->unpin)
    167 			ld->fb->unpin(ld->fb);
    168 		ld->fb = NULL;
    169 	}
    170 
    171 	return 0;
    172 }
    173 
    174 static int vmw_ldu_add_active(struct vmw_private *vmw_priv,
    175 			      struct vmw_legacy_display_unit *ldu,
    176 			      struct vmw_framebuffer *vfb)
    177 {
    178 	struct vmw_legacy_display *ld = vmw_priv->ldu_priv;
    179 	struct vmw_legacy_display_unit *entry;
    180 	struct list_head *at;
    181 
    182 	BUG_ON(!ld->num_active && ld->fb);
    183 	if (vfb != ld->fb) {
    184 		if (ld->fb && ld->fb->unpin)
    185 			ld->fb->unpin(ld->fb);
    186 		if (vfb->pin)
    187 			vfb->pin(vfb);
    188 		ld->fb = vfb;
    189 	}
    190 
    191 	if (!list_empty(&ldu->active))
    192 		return 0;
    193 
    194 	at = &ld->active;
    195 	list_for_each_entry(entry, &ld->active, active) {
    196 		if (entry->base.unit > ldu->base.unit)
    197 			break;
    198 
    199 		at = &entry->active;
    200 	}
    201 
    202 	list_add(&ldu->active, at);
    203 
    204 	ld->num_active++;
    205 
    206 	return 0;
    207 }
    208 
    209 static int vmw_ldu_crtc_set_config(struct drm_mode_set *set)
    210 {
    211 	struct vmw_private *dev_priv;
    212 	struct vmw_legacy_display_unit *ldu;
    213 	struct drm_connector *connector;
    214 	struct drm_display_mode *mode;
    215 	struct drm_encoder *encoder;
    216 	struct vmw_framebuffer *vfb;
    217 	struct drm_framebuffer *fb;
    218 	struct drm_crtc *crtc;
    219 
    220 	if (!set)
    221 		return -EINVAL;
    222 
    223 	if (!set->crtc)
    224 		return -EINVAL;
    225 
    226 	/* get the ldu */
    227 	crtc = set->crtc;
    228 	ldu = vmw_crtc_to_ldu(crtc);
    229 	vfb = set->fb ? vmw_framebuffer_to_vfb(set->fb) : NULL;
    230 	dev_priv = vmw_priv(crtc->dev);
    231 
    232 	if (set->num_connectors > 1) {
    233 		DRM_ERROR("to many connectors\n");
    234 		return -EINVAL;
    235 	}
    236 
    237 	if (set->num_connectors == 1 &&
    238 	    set->connectors[0] != &ldu->base.connector) {
    239 		DRM_ERROR("connector doesn't match %p %p\n",
    240 			set->connectors[0], &ldu->base.connector);
    241 		return -EINVAL;
    242 	}
    243 
    244 	/* ldu only supports one fb active at the time */
    245 	if (dev_priv->ldu_priv->fb && vfb &&
    246 	    !(dev_priv->ldu_priv->num_active == 1 &&
    247 	      !list_empty(&ldu->active)) &&
    248 	    dev_priv->ldu_priv->fb != vfb) {
    249 		DRM_ERROR("Multiple framebuffers not supported\n");
    250 		return -EINVAL;
    251 	}
    252 
    253 	/* since they always map one to one these are safe */
    254 	connector = &ldu->base.connector;
    255 	encoder = &ldu->base.encoder;
    256 
    257 	/* should we turn the crtc off? */
    258 	if (set->num_connectors == 0 || !set->mode || !set->fb) {
    259 
    260 		connector->encoder = NULL;
    261 		encoder->crtc = NULL;
    262 		crtc->primary->fb = NULL;
    263 		crtc->enabled = false;
    264 
    265 		vmw_ldu_del_active(dev_priv, ldu);
    266 
    267 		return vmw_ldu_commit_list(dev_priv);
    268 	}
    269 
    270 
    271 	/* we now know we want to set a mode */
    272 	mode = set->mode;
    273 	fb = set->fb;
    274 
    275 	if (set->x + mode->hdisplay > fb->width ||
    276 	    set->y + mode->vdisplay > fb->height) {
    277 		DRM_ERROR("set outside of framebuffer\n");
    278 		return -EINVAL;
    279 	}
    280 
    281 	vmw_fb_off(dev_priv);
    282 
    283 	crtc->primary->fb = fb;
    284 	encoder->crtc = crtc;
    285 	connector->encoder = encoder;
    286 	crtc->x = set->x;
    287 	crtc->y = set->y;
    288 	crtc->mode = *mode;
    289 	crtc->enabled = true;
    290 
    291 	vmw_ldu_add_active(dev_priv, ldu, vfb);
    292 
    293 	return vmw_ldu_commit_list(dev_priv);
    294 }
    295 
    296 static struct drm_crtc_funcs vmw_legacy_crtc_funcs = {
    297 	.save = vmw_du_crtc_save,
    298 	.restore = vmw_du_crtc_restore,
    299 	.cursor_set = vmw_du_crtc_cursor_set,
    300 	.cursor_move = vmw_du_crtc_cursor_move,
    301 	.gamma_set = vmw_du_crtc_gamma_set,
    302 	.destroy = vmw_ldu_crtc_destroy,
    303 	.set_config = vmw_ldu_crtc_set_config,
    304 };
    305 
    306 
    307 /*
    308  * Legacy Display Unit encoder functions
    309  */
    310 
    311 static void vmw_ldu_encoder_destroy(struct drm_encoder *encoder)
    312 {
    313 	vmw_ldu_destroy(vmw_encoder_to_ldu(encoder));
    314 }
    315 
    316 static struct drm_encoder_funcs vmw_legacy_encoder_funcs = {
    317 	.destroy = vmw_ldu_encoder_destroy,
    318 };
    319 
    320 /*
    321  * Legacy Display Unit connector functions
    322  */
    323 
    324 static void vmw_ldu_connector_destroy(struct drm_connector *connector)
    325 {
    326 	vmw_ldu_destroy(vmw_connector_to_ldu(connector));
    327 }
    328 
    329 static struct drm_connector_funcs vmw_legacy_connector_funcs = {
    330 	.dpms = vmw_du_connector_dpms,
    331 	.save = vmw_du_connector_save,
    332 	.restore = vmw_du_connector_restore,
    333 	.detect = vmw_du_connector_detect,
    334 	.fill_modes = vmw_du_connector_fill_modes,
    335 	.set_property = vmw_du_connector_set_property,
    336 	.destroy = vmw_ldu_connector_destroy,
    337 };
    338 
    339 static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
    340 {
    341 	struct vmw_legacy_display_unit *ldu;
    342 	struct drm_device *dev = dev_priv->dev;
    343 	struct drm_connector *connector;
    344 	struct drm_encoder *encoder;
    345 	struct drm_crtc *crtc;
    346 
    347 	ldu = kzalloc(sizeof(*ldu), GFP_KERNEL);
    348 	if (!ldu)
    349 		return -ENOMEM;
    350 
    351 	ldu->base.unit = unit;
    352 	crtc = &ldu->base.crtc;
    353 	encoder = &ldu->base.encoder;
    354 	connector = &ldu->base.connector;
    355 
    356 	INIT_LIST_HEAD(&ldu->active);
    357 
    358 	ldu->base.pref_active = (unit == 0);
    359 	ldu->base.pref_width = dev_priv->initial_width;
    360 	ldu->base.pref_height = dev_priv->initial_height;
    361 	ldu->base.pref_mode = NULL;
    362 	ldu->base.is_implicit = true;
    363 
    364 	drm_connector_init(dev, connector, &vmw_legacy_connector_funcs,
    365 			   DRM_MODE_CONNECTOR_VIRTUAL);
    366 	connector->status = vmw_du_connector_detect(connector, true);
    367 
    368 	drm_encoder_init(dev, encoder, &vmw_legacy_encoder_funcs,
    369 			 DRM_MODE_ENCODER_VIRTUAL);
    370 	drm_mode_connector_attach_encoder(connector, encoder);
    371 	encoder->possible_crtcs = (1 << unit);
    372 	encoder->possible_clones = 0;
    373 
    374 	(void) drm_sysfs_connector_add(connector);
    375 
    376 	drm_crtc_init(dev, crtc, &vmw_legacy_crtc_funcs);
    377 
    378 	drm_mode_crtc_set_gamma_size(crtc, 256);
    379 
    380 	drm_object_attach_property(&connector->base,
    381 				      dev->mode_config.dirty_info_property,
    382 				      1);
    383 
    384 	return 0;
    385 }
    386 
    387 int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
    388 {
    389 	struct drm_device *dev = dev_priv->dev;
    390 	int i, ret;
    391 
    392 	if (dev_priv->ldu_priv) {
    393 		DRM_INFO("ldu system already on\n");
    394 		return -EINVAL;
    395 	}
    396 
    397 	dev_priv->ldu_priv = kmalloc(sizeof(*dev_priv->ldu_priv), GFP_KERNEL);
    398 	if (!dev_priv->ldu_priv)
    399 		return -ENOMEM;
    400 
    401 	INIT_LIST_HEAD(&dev_priv->ldu_priv->active);
    402 	dev_priv->ldu_priv->num_active = 0;
    403 	dev_priv->ldu_priv->last_num_active = 0;
    404 	dev_priv->ldu_priv->fb = NULL;
    405 
    406 	/* for old hardware without multimon only enable one display */
    407 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
    408 		ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
    409 	else
    410 		ret = drm_vblank_init(dev, 1);
    411 	if (ret != 0)
    412 		goto err_free;
    413 
    414 	ret = drm_mode_create_dirty_info_property(dev);
    415 	if (ret != 0)
    416 		goto err_vblank_cleanup;
    417 
    418 	if (dev_priv->capabilities & SVGA_CAP_MULTIMON)
    419 		for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i)
    420 			vmw_ldu_init(dev_priv, i);
    421 	else
    422 		vmw_ldu_init(dev_priv, 0);
    423 
    424 	return 0;
    425 
    426 err_vblank_cleanup:
    427 	drm_vblank_cleanup(dev);
    428 err_free:
    429 	kfree(dev_priv->ldu_priv);
    430 	dev_priv->ldu_priv = NULL;
    431 	return ret;
    432 }
    433 
    434 int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
    435 {
    436 	struct drm_device *dev = dev_priv->dev;
    437 
    438 	if (!dev_priv->ldu_priv)
    439 		return -ENOSYS;
    440 
    441 	drm_vblank_cleanup(dev);
    442 
    443 	BUG_ON(!list_empty(&dev_priv->ldu_priv->active));
    444 
    445 	kfree(dev_priv->ldu_priv);
    446 
    447 	return 0;
    448 }
    449