svga: Add a limit to the maximum surface size

This patch adds a limit to the maximum surface size which is
based on the maximum size of a single mob. If this value is not
available, the maximum surface size is by default set to 128 MB.

Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/gallium/drivers/svga/include/svga3d_surfacedefs.h

@@ -872,7 +872,7 @@ svga3dsurface_get_serialized_size(SVGA3dSurfaceFormat format,
 				  bool cubemap)
 {
 	const struct svga3d_surface_desc *desc = svga3dsurface_get_desc(format);
-	uint32 total_size = 0;
+	uint64_t total_size = 0;
 	uint32 mip;
 
 	for (mip = 0; mip < num_mip_levels; mip++) {
@@ -885,7 +885,8 @@ svga3dsurface_get_serialized_size(SVGA3dSurfaceFormat format,
 	if (cubemap)
 		total_size *= SVGA3D_MAX_SURFACE_FACES;
 
-	return total_size;
+	return (total_size > (uint64_t) MAX_UINT32) ? MAX_UINT32 : 
+                                                      (uint32) total_size;
 }
 
 

src/gallium/drivers/svga/include/svga_reg.h

@@ -180,7 +180,15 @@ enum {
    SVGA_REG_MEMORY_SIZE = 47,       /* Total dedicated device memory excluding FIFO */
    SVGA_REG_COMMAND_LOW = 48,       /* Lower 32 bits and submits commands */
    SVGA_REG_COMMAND_HIGH = 49,      /* Upper 32 bits of command buffer PA */
-   SVGA_REG_TOP = 50,               /* Must be 1 more than the last register */
+   SVGA_REG_MAX_PRIMARY_BOUNDING_BOX_MEM = 50,   /* Max primary memory */
+   SVGA_REG_SUGGESTED_GBOBJECT_MEM_SIZE_KB = 51, /* Suggested limit on mob mem */
+   SVGA_REG_DEV_CAP = 52,           /* Write dev cap index, read value */
+   SVGA_REG_CMD_PREPEND_LOW = 53,
+   SVGA_REG_iCMD_PREPEND_HIGH = 54,
+   SVGA_REG_SCREENTARGET_MAX_WIDTH = 55,
+   SVGA_REG_SCREENTARGET_MAX_HEIGHT = 56,
+   SVGA_REG_MOB_MAX_SIZE = 57,
+   SVGA_REG_TOP = 58,               /* Must be 1 more than the last register */
 
    SVGA_PALETTE_BASE = 1024,        /* Base of SVGA color map */
    /* Next 768 (== 256*3) registers exist for colormap */

src/gallium/drivers/svga/svga_resource.c

@@ -30,6 +30,7 @@
 #include "svga_resource_texture.h"
 #include "svga_context.h"
 #include "svga_screen.h"
+#include "svga_format.h"
 
 
 static struct pipe_resource *
@@ -55,6 +56,47 @@ svga_resource_from_handle(struct pipe_screen * screen,
 }
 
 
+/**
+ * Check if a resource (texture, buffer) of the given size
+ * and format can be created.
+ * \Return TRUE if OK, FALSE if too large.
+ */
+static boolean
+svga_can_create_resource(struct pipe_screen *screen,
+                         const struct pipe_resource *res)
+{
+   struct svga_screen *svgascreen = svga_screen(screen);
+   struct svga_winsys_screen *sws = svgascreen->sws;
+   SVGA3dSurfaceFormat format;
+   SVGA3dSize base_level_size;
+   uint32 numFaces;
+   uint32 numMipLevels;
+
+   if (res->target == PIPE_BUFFER) {
+      format = SVGA3D_BUFFER;
+      base_level_size.width = res->width0;
+      base_level_size.height = 1;
+      base_level_size.depth = 1;
+      numFaces = 1;
+      numMipLevels = 1;
+
+   } else {
+      format = svga_translate_format(svgascreen, res->format, res->bind);
+      if (format == SVGA3D_FORMAT_INVALID)
+         return FALSE;
+
+      base_level_size.width = res->width0;
+      base_level_size.height = res->height0;
+      base_level_size.depth = res->depth0;
+      numFaces = (res->target == PIPE_TEXTURE_CUBE) ? 6 : 1;
+      numMipLevels = res->last_level + 1;
+   }
+
+   return sws->surface_can_create(sws, format, base_level_size, 
+                                  numFaces, numMipLevels);
+}
+
+
 void
 svga_init_resource_functions(struct svga_context *svga)
 {
@@ -71,4 +113,5 @@ svga_init_screen_resource_functions(struct svga_screen *is)
    is->screen.resource_from_handle = svga_resource_from_handle;
    is->screen.resource_get_handle = u_resource_get_handle_vtbl;
    is->screen.resource_destroy = u_resource_destroy_vtbl;
+   is->screen.can_create_resource = svga_can_create_resource;
 }

src/gallium/drivers/svga/svga_resource_texture.c

@@ -727,8 +727,10 @@ svga_texture_create(struct pipe_screen *screen,
 
    SVGA_DBG(DEBUG_DMA, "surface_create for texture\n", tex->handle);
    tex->handle = svga_screen_surface_create(svgascreen, &tex->key);
-   if (tex->handle)
-      SVGA_DBG(DEBUG_DMA, "  --> got sid %p (texture)\n", tex->handle);
+   if (!tex->handle)
+       goto error2;
+
+   SVGA_DBG(DEBUG_DMA, "  --> got sid %p (texture)\n", tex->handle);
 
    debug_reference(&tex->b.b.reference,
                    (debug_reference_descriptor)debug_describe_resource, 0);

src/gallium/drivers/svga/svga_winsys.h

@@ -334,6 +334,18 @@ struct svga_winsys_screen
 			struct svga_winsys_surface **pdst,
 			struct svga_winsys_surface *src);
 
+   /**
+    * Check if a resource (texture, buffer) of the given size
+    * and format can be created.
+    * \Return TRUE if OK, FALSE if too large.
+    */
+   boolean
+   (*surface_can_create)(struct svga_winsys_screen *sws,
+                         SVGA3dSurfaceFormat format,
+                         SVGA3dSize size,
+                         uint32 numFaces,
+                         uint32 numMipLevels);
+
    /**
     * Buffer management. Buffer attributes are mostly fixed over its lifetime.
     *

src/gallium/winsys/svga/drm/vmw_context.c

@@ -49,6 +49,21 @@
 
 #define VMW_MUST_FLUSH_STACK 8
 
+/*
+ * A factor applied to the maximum mob memory size to determine
+ * the optimial time to preemptively flush the command buffer.
+ * The constant is based on some performance trials with SpecViewperf.
+ */
+#define VMW_MAX_MOB_MEM_FACTOR  2
+
+/*
+ * A factor applied to the maximum surface memory size to determine
+ * the optimial time to preemptively flush the command buffer.
+ * The constant is based on some performance trials with SpecViewperf.
+ */
+#define VMW_MAX_SURF_MEM_FACTOR 2
+
+
 struct vmw_buffer_relocation
 {
    struct pb_buffer *buffer;
@@ -395,7 +410,7 @@ vmw_swc_mob_relocation(struct svga_winsys_context *swc,
    if (vmw_swc_add_validate_buffer(vswc, reloc->buffer, flags)) {
       vswc->seen_mobs += reloc->buffer->size;
       /* divide by 5, tested for best performance */
-      if (vswc->seen_mobs >= vswc->vws->ioctl.max_mob_memory / 5)
+      if (vswc->seen_mobs >= vswc->vws->ioctl.max_mob_memory / VMW_MAX_MOB_MEM_FACTOR)
          vswc->preemptive_flush = TRUE;
    }
 
@@ -457,7 +472,7 @@ vmw_swc_surface_only_relocation(struct svga_winsys_context *swc,
 
       vswc->seen_surfaces += vsurf->size;
       /* divide by 5 not well tuned for performance */
-      if (vswc->seen_surfaces >= vswc->vws->ioctl.max_surface_memory / 5)
+      if (vswc->seen_surfaces >= vswc->vws->ioctl.max_surface_memory / VMW_MAX_SURF_MEM_FACTOR)
          vswc->preemptive_flush = TRUE;
    }
 

src/gallium/winsys/svga/drm/vmw_screen.h

@@ -74,6 +74,7 @@ struct vmw_winsys_screen
       struct vmw_cap_3d *cap_3d;
       uint64_t max_mob_memory;
       uint64_t max_surface_memory;
+      uint64_t max_texture_size;
       boolean have_drm_2_6;
    } ioctl;
 

src/gallium/winsys/svga/drm/vmw_screen_ioctl.c

@@ -51,6 +51,8 @@
 #include <errno.h>
 #include <unistd.h>
 
+#define VMW_MAX_DEFAULT_TEXTURE_SIZE   (128 * 1024 * 1024)
+
 struct vmw_region
 {
    uint32_t handle;
@@ -904,6 +906,18 @@ vmw_ioctl_init(struct vmw_winsys_screen *vws)
       } else {
          vws->ioctl.max_mob_memory = gp_arg.value;
       }
+
+      memset(&gp_arg, 0, sizeof(gp_arg));
+      gp_arg.param = DRM_VMW_PARAM_MAX_MOB_SIZE;
+      ret = drmCommandWriteRead(vws->ioctl.drm_fd, DRM_VMW_GET_PARAM,
+                                &gp_arg, sizeof(gp_arg));
+
+      if (ret || gp_arg.value == 0) {
+           vws->ioctl.max_texture_size = VMW_MAX_DEFAULT_TEXTURE_SIZE;
+      } else {
+           vws->ioctl.max_texture_size = gp_arg.value;
+      }
+
       /* Never early flush surfaces, mobs do accounting. */
       vws->ioctl.max_surface_memory = -1;
    } else {
@@ -920,6 +934,9 @@ vmw_ioctl_init(struct vmw_winsys_screen *vws)
       } else {
          vws->ioctl.max_surface_memory = gp_arg.value;
       }
+
+      vws->ioctl.max_texture_size = VMW_MAX_DEFAULT_TEXTURE_SIZE;
+
       size = SVGA_FIFO_3D_CAPS_SIZE * sizeof(uint32_t);
    }
 

src/gallium/winsys/svga/drm/vmw_screen_svga.c

@@ -164,6 +164,10 @@ vmw_svga_winsys_surface_create(struct svga_winsys_screen *sws,
     * when to flush on non-GB hosts.
     */
    buffer_size = svga3dsurface_get_serialized_size(format, size, numMipLevels, (numFaces == 6));
+   if (buffer_size > vws->ioctl.max_texture_size) {
+      goto no_sid;
+   }
+
    if (sws->have_gb_objects) {
       SVGAGuestPtr ptr = {0,0};
 
@@ -249,6 +253,25 @@ no_surface:
    return NULL;
 }
 
+static boolean
+vmw_svga_winsys_surface_can_create(struct svga_winsys_screen *sws,
+                               SVGA3dSurfaceFormat format,
+                               SVGA3dSize size,
+                               uint32 numFaces,
+                               uint32 numMipLevels)
+{
+   struct vmw_winsys_screen *vws = vmw_winsys_screen(sws);
+   uint32_t buffer_size;
+
+   buffer_size = svga3dsurface_get_serialized_size(format, size, 
+                                                   numMipLevels, 
+                                                   (numFaces == 6));
+   if (buffer_size > vws->ioctl.max_texture_size) {
+	return FALSE;
+   }
+   return TRUE;
+}
+
 
 static boolean
 vmw_svga_winsys_surface_is_flushed(struct svga_winsys_screen *sws,
@@ -371,6 +394,7 @@ vmw_winsys_screen_init_svga(struct vmw_winsys_screen *vws)
    vws->base.surface_create = vmw_svga_winsys_surface_create;
    vws->base.surface_is_flushed = vmw_svga_winsys_surface_is_flushed;
    vws->base.surface_reference = vmw_svga_winsys_surface_ref;
+   vws->base.surface_can_create = vmw_svga_winsys_surface_can_create;
    vws->base.buffer_create = vmw_svga_winsys_buffer_create;
    vws->base.buffer_map = vmw_svga_winsys_buffer_map;
    vws->base.buffer_unmap = vmw_svga_winsys_buffer_unmap;