drm/vmwgfx: Implement screen targets

Add support for the screen target device interface.
Add a getparam parameter and bump minor to signal availability.
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

drivers/gpu/drm/vmwgfx/Makefile

@@ -7,6 +7,6 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
 	    vmwgfx_overlay.o vmwgfx_marker.o vmwgfx_gmrid_manager.o \
 	    vmwgfx_fence.o vmwgfx_dmabuf.o vmwgfx_scrn.o vmwgfx_context.o \
 	    vmwgfx_surface.o vmwgfx_prime.o vmwgfx_mob.o vmwgfx_shader.o \
-	    vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o \
+	    vmwgfx_cmdbuf_res.o vmwgfx_cmdbuf.o vmwgfx_stdu.o \
 
 obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

@@ -693,22 +693,28 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
 				 SVGA_REG_MAX_PRIMARY_BOUNDING_BOX_MEM);
 		dev_priv->max_mob_size =
 			vmw_read(dev_priv, SVGA_REG_MOB_MAX_SIZE);
+		dev_priv->stdu_max_width =
+			vmw_read(dev_priv, SVGA_REG_SCREENTARGET_MAX_WIDTH);
+		dev_priv->stdu_max_height =
+			vmw_read(dev_priv, SVGA_REG_SCREENTARGET_MAX_HEIGHT);
+
+		vmw_write(dev_priv, SVGA_REG_DEV_CAP,
+			  SVGA3D_DEVCAP_MAX_TEXTURE_WIDTH);
+		dev_priv->texture_max_width = vmw_read(dev_priv,
+						       SVGA_REG_DEV_CAP);
+		vmw_write(dev_priv, SVGA_REG_DEV_CAP,
+			  SVGA3D_DEVCAP_MAX_TEXTURE_HEIGHT);
+		dev_priv->texture_max_height = vmw_read(dev_priv,
+							SVGA_REG_DEV_CAP);
 	} else
 		dev_priv->prim_bb_mem = dev_priv->vram_size;
+ 
+	vmw_print_capabilities(dev_priv->capabilities);
 
 	ret = vmw_dma_masks(dev_priv);
 	if (unlikely(ret != 0))
 		goto out_err0;
 
-	/*
-	 * Limit back buffer size to VRAM size.  Remove this once
-	 * screen targets are implemented.
-	 */
-	if (dev_priv->prim_bb_mem > dev_priv->vram_size)
-		dev_priv->prim_bb_mem = dev_priv->vram_size;
-
-	vmw_print_capabilities(dev_priv->capabilities);
-
 	if (dev_priv->capabilities & SVGA_CAP_GMR2) {
 		DRM_INFO("Max GMR ids is %u\n",
 			 (unsigned)dev_priv->max_gmr_ids);

drivers/gpu/drm/vmwgfx/vmwgfx_drv.h

@@ -40,17 +40,17 @@
 #include <drm/ttm/ttm_module.h>
 #include "vmwgfx_fence.h"
 
-#define VMWGFX_DRIVER_DATE "20140704"
+#define VMWGFX_DRIVER_DATE "20150626"
 #define VMWGFX_DRIVER_MAJOR 2
-#define VMWGFX_DRIVER_MINOR 6
-#define VMWGFX_DRIVER_PATCHLEVEL 1
+#define VMWGFX_DRIVER_MINOR 7
+#define VMWGFX_DRIVER_PATCHLEVEL 0
 #define VMWGFX_FILE_PAGE_OFFSET 0x00100000
 #define VMWGFX_FIFO_STATIC_SIZE (1024*1024)
 #define VMWGFX_MAX_RELOCATIONS 2048
 #define VMWGFX_MAX_VALIDATIONS 2048
 #define VMWGFX_MAX_DISPLAYS 16
 #define VMWGFX_CMD_BOUNCE_INIT_SIZE 32768
-#define VMWGFX_ENABLE_SCREEN_TARGET_OTABLE 0
+#define VMWGFX_ENABLE_SCREEN_TARGET_OTABLE 1
 
 /*
  * Perhaps we should have sysfs entries for these.
@@ -337,7 +337,8 @@ struct vmw_ctx_binding_state {
 enum vmw_display_unit_type {
 	vmw_du_invalid = 0,
 	vmw_du_legacy,
-	vmw_du_screen_object
+	vmw_du_screen_object,
+	vmw_du_screen_target
 };
 
 
@@ -402,6 +403,10 @@ struct vmw_private {
 	uint32_t mmio_size;
 	uint32_t fb_max_width;
 	uint32_t fb_max_height;
+	uint32_t texture_max_width;
+	uint32_t texture_max_height;
+	uint32_t stdu_max_width;
+	uint32_t stdu_max_height;
 	uint32_t initial_width;
 	uint32_t initial_height;
 	__le32 __iomem *mmio_virt;

drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

@@ -105,6 +105,10 @@ int vmw_getparam_ioctl(struct drm_device *dev, void *data,
 	case DRM_VMW_PARAM_MAX_MOB_SIZE:
 		param->value = dev_priv->max_mob_size;
 		break;
+	case DRM_VMW_PARAM_SCREEN_TARGET:
+		param->value =
+			(dev_priv->active_display_unit == vmw_du_screen_target);
+		break;
 	default:
 		DRM_ERROR("Illegal vmwgfx get param request: %d\n",
 			  param->param);

drivers/gpu/drm/vmwgfx/vmwgfx_kms.c

@@ -463,6 +463,11 @@ static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
 						   flags, color,
 						   clips, num_clips,
 						   inc, NULL);
+	else
+		ret = vmw_kms_stdu_do_surface_dirty(dev_priv, file_priv,
+						    &vfbs->base,
+						    clips, num_clips,
+						    inc);
 
 	vmw_fifo_flush(dev_priv, false);
 	ttm_read_unlock(&dev_priv->reservation_sem);
@@ -636,6 +641,11 @@ static int vmw_framebuffer_dmabuf_dirty(struct drm_framebuffer *framebuffer,
 						  flags, color,
 						  clips, num_clips, increment,
 						  NULL);
+	} else {
+		ret = vmw_kms_stdu_do_surface_dirty(dev_priv, file_priv,
+						    &vfbd->base,
+						    clips, num_clips,
+						    increment);
 	}
 
 	vmw_fifo_flush(dev_priv, false);
@@ -999,8 +1009,6 @@ int vmw_kms_generic_present(struct vmw_private *dev_priv,
 			break;
 	}
 
-	vmw_fifo_flush(dev_priv, false);
-
 	kfree(cmd);
 out_free_tmp:
 	kfree(tmp);
@@ -1017,8 +1025,21 @@ int vmw_kms_present(struct vmw_private *dev_priv,
 		    struct drm_vmw_rect *clips,
 		    uint32_t num_clips)
 {
-	return vmw_kms_generic_present(dev_priv, file_priv, vfb, surface, sid,
-				       destX, destY, clips, num_clips);
+	int ret;
+
+	if (dev_priv->active_display_unit == vmw_du_screen_target)
+		ret = vmw_kms_stdu_present(dev_priv, file_priv, vfb, sid,
+					   destX, destY, clips, num_clips);
+	else
+		ret = vmw_kms_generic_present(dev_priv, file_priv, vfb,
+					      surface, sid, destX, destY,
+					      clips, num_clips);
+	if (ret)
+		return ret;
+
+	vmw_fifo_flush(dev_priv, false);
+
+	return 0;
 }
 
 int vmw_kms_readback(struct vmw_private *dev_priv,
@@ -1141,9 +1162,12 @@ int vmw_kms_init(struct vmw_private *dev_priv)
 	dev->mode_config.max_width = 8192;
 	dev->mode_config.max_height = 8192;
 
-	ret = vmw_kms_sou_init_display(dev_priv);
-	if (ret) /* Fallback */
-		ret = vmw_kms_ldu_init_display(dev_priv);
+	ret = vmw_kms_stdu_init_display(dev_priv);
+	if (ret) {
+		ret = vmw_kms_sou_init_display(dev_priv);
+		if (ret) /* Fallback */
+			ret = vmw_kms_ldu_init_display(dev_priv);
+	}
 
 	return ret;
 }
@@ -1160,6 +1184,8 @@ int vmw_kms_close(struct vmw_private *dev_priv)
 	drm_mode_config_cleanup(dev_priv->dev);
 	if (dev_priv->active_display_unit == vmw_du_screen_object)
 		ret = vmw_kms_sou_close_display(dev_priv);
+	else if (dev_priv->active_display_unit == vmw_du_screen_target)
+		ret = vmw_kms_stdu_close_display(dev_priv);
 	else
 		ret = vmw_kms_ldu_close_display(dev_priv);
 
@@ -1311,7 +1337,9 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
 				uint32_t pitch,
 				uint32_t height)
 {
-	return ((u64) pitch * (u64) height) < (u64) dev_priv->prim_bb_mem;
+	return ((u64) pitch * (u64) height) < (u64)
+		((dev_priv->active_display_unit == vmw_du_screen_target) ?
+		 dev_priv->prim_bb_mem : dev_priv->vram_size);
 }
 
 
@@ -1558,6 +1586,11 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
 	if (dev_priv->active_display_unit == vmw_du_screen_object)
 		assumed_bpp = 4;
 
+	if (dev_priv->active_display_unit == vmw_du_screen_target) {
+		max_width  = min(max_width,  dev_priv->stdu_max_width);
+		max_height = min(max_height, dev_priv->stdu_max_height);
+	}
+
 	/* Add preferred mode */
 	mode = drm_mode_duplicate(dev, &prefmode);
 	if (!mode)
@@ -1674,6 +1707,19 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
 			bounding_box.h = rects[i].y + rects[i].h;
 	}
 
+	/*
+	 * For Screen Target Display Unit, all the displays must fit
+	 * inside of maximum texture size.
+	 */
+	if (dev_priv->active_display_unit == vmw_du_screen_target)
+		if (bounding_box.w > dev_priv->texture_max_width ||
+		    bounding_box.h > dev_priv->texture_max_height) {
+			DRM_ERROR("Layout exceeds maximum texture size\n");
+			ret = -EINVAL;
+			goto out_free;
+		}
+
+
 	vmw_du_update_layout(dev_priv, arg->num_outputs, rects);
 
 out_free:

drivers/gpu/drm/vmwgfx/vmwgfx_kms.h

@@ -204,4 +204,24 @@ int vmw_kms_sou_do_dmabuf_dirty(struct drm_file *file_priv,
 				struct drm_clip_rect *clips,
 				unsigned num_clips, int increment,
 				struct vmw_fence_obj **out_fence);
+
+
+/*
+ * Screen Target Display Unit functions - vmwgfx_stdu.c
+ */
+int vmw_kms_stdu_init_display(struct vmw_private *dev_priv);
+int vmw_kms_stdu_close_display(struct vmw_private *dev_priv);
+int vmw_kms_stdu_do_surface_dirty(struct vmw_private *dev_priv,
+				  struct drm_file *file_priv,
+				  struct vmw_framebuffer *framebuffer,
+				  struct drm_clip_rect *clips,
+				  unsigned num_clips, int increment);
+int vmw_kms_stdu_present(struct vmw_private *dev_priv,
+			 struct drm_file *file_priv,
+			 struct vmw_framebuffer *vfb,
+			 uint32_t user_handle,
+			 int32_t dest_x, int32_t dest_y,
+			 struct drm_vmw_rect *clips,
+			 uint32_t num_clips);
+
 #endif

drivers/gpu/drm/vmwgfx/vmwgfx_mob.c

@@ -31,7 +31,8 @@
  * If we set up the screen target otable, screen objects stop working.
  */
 
-#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE) ? 0 : 1)
+#define VMW_OTABLE_SETUP_SUB ((VMWGFX_ENABLE_SCREEN_TARGET_OTABLE &&	\
+			       (dev_priv->capabilities & SVGA_CAP_3D)) ? 0 : 1)
 
 #ifdef CONFIG_64BIT
 #define VMW_PPN_SIZE 8

drivers/gpu/drm/vmwgfx/vmwgfx_surface.c

@@ -1486,6 +1486,10 @@ int vmw_surface_gb_priv_define(struct drm_device *dev,
 					srf->mip_levels[0],
 					srf->flags & SVGA3D_SURFACE_CUBEMAP);
 
+	if (dev_priv->active_display_unit == vmw_du_screen_target &&
+	    for_scanout)
+		srf->flags |= SVGA3D_SURFACE_SCREENTARGET;
+
 	/*
 	 * From this point, the generic resource management functions
 	 * destroy the object on failure.

include/uapi/drm/vmwgfx_drm.h

@@ -88,6 +88,7 @@
 #define DRM_VMW_PARAM_3D_CAPS_SIZE     8
 #define DRM_VMW_PARAM_MAX_MOB_MEMORY   9
 #define DRM_VMW_PARAM_MAX_MOB_SIZE     10
+#define DRM_VMW_PARAM_SCREEN_TARGET    11
 
 /**
  * enum drm_vmw_handle_type - handle type for ref ioctls