1 files changed, 430 insertions, 157 deletions

diff --git a/src/gallium/drivers/cell/ppu/cell_texture.c b/src/gallium/drivers/cell/ppu/cell_texture.c
index b6590dfb86..fa52e2cbea 100644
--- a/src/gallium/drivers/cell/ppu/cell_texture.c
+++ b/src/gallium/drivers/cell/ppu/cell_texture.c
@@ -28,12 +28,13 @@
   * Authors:
   *   Keith Whitwell <keith@tungstengraphics.com>
   *   Michel Dänzer <michel@tungstengraphics.com>
+  *   Brian Paul
   */
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
-#include "pipe/p_winsys.h"
+#include "pipe/internal/p_winsys_screen.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
@@ -42,30 +43,31 @@
 #include "cell_texture.h"
 
 
-/* Simple, maximally packed layout.
- */
 
-static unsigned minify( unsigned d )
+static unsigned
+minify(unsigned d)
 {
    return MAX2(1, d>>1);
 }
 
 
 static void
-cell_texture_layout(struct cell_texture * spt)
+cell_texture_layout(struct cell_texture *ct)
 {
-   struct pipe_texture *pt = &spt->base;
+   struct pipe_texture *pt = &ct->base;
    unsigned level;
    unsigned width = pt->width[0];
    unsigned height = pt->height[0];
    unsigned depth = pt->depth[0];
 
-   spt->buffer_size = 0;
+   ct->buffer_size = 0;
 
    for ( level = 0 ; level <= pt->last_level ; level++ ) {
       unsigned size;
       unsigned w_tile, h_tile;
 
+      assert(level < CELL_MAX_TEXTURE_LEVELS);
+
       /* width, height, rounded up to tile size */
       w_tile = align(width, TILE_SIZE);
       h_tile = align(height, TILE_SIZE);
@@ -76,9 +78,9 @@ cell_texture_layout(struct cell_texture * spt)
       pt->nblocksx[level] = pf_get_nblocksx(&pt->block, w_tile);  
       pt->nblocksy[level] = pf_get_nblocksy(&pt->block, h_tile);  
 
-      spt->stride[level] = pt->nblocksx[level] * pt->block.size;
+      ct->stride[level] = pt->nblocksx[level] * pt->block.size;
 
-      spt->level_offset[level] = spt->buffer_size;
+      ct->level_offset[level] = ct->buffer_size;
 
       size = pt->nblocksx[level] * pt->nblocksy[level] * pt->block.size;
       if (pt->target == PIPE_TEXTURE_CUBE)
@@ -86,7 +88,7 @@ cell_texture_layout(struct cell_texture * spt)
       else
          size *= depth;
 
-      spt->buffer_size += size;
+      ct->buffer_size += size;
 
       width  = minify(width);
       height = minify(height);
@@ -100,26 +102,25 @@ cell_texture_create(struct pipe_screen *screen,
                     const struct pipe_texture *templat)
 {
    struct pipe_winsys *ws = screen->winsys;
-   struct cell_texture *spt = CALLOC_STRUCT(cell_texture);
-   if (!spt)
+   struct cell_texture *ct = CALLOC_STRUCT(cell_texture);
+   if (!ct)
       return NULL;
 
-   spt->base = *templat;
-   spt->base.refcount = 1;
-   spt->base.screen = screen;
+   ct->base = *templat;
+   ct->base.refcount = 1;
+   ct->base.screen = screen;
 
-   cell_texture_layout(spt);
+   cell_texture_layout(ct);
 
-   spt->buffer = ws->buffer_create(ws, 32,
-                                   PIPE_BUFFER_USAGE_PIXEL,
-                                   spt->buffer_size);
+   ct->buffer = ws->buffer_create(ws, 32, PIPE_BUFFER_USAGE_PIXEL,
+                                   ct->buffer_size);
 
-   if (!spt->buffer) {
-      FREE(spt);
+   if (!ct->buffer) {
+      FREE(ct);
       return NULL;
    }
 
-   return &spt->base;
+   return &ct->base;
 }
 
 
@@ -135,244 +136,514 @@ cell_texture_release(struct pipe_screen *screen,
        __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
    */
    if (--(*pt)->refcount <= 0) {
-      struct cell_texture *spt = cell_texture(*pt);
+      /* Delete this texture now.
+       * But note that the underlying pipe_buffer may linger...
+       */
+      struct cell_texture *ct = cell_texture(*pt);
+      uint i;
 
       /*
-      DBG("%s deleting %p\n", __FUNCTION__, (void *) spt);
+      DBG("%s deleting %p\n", __FUNCTION__, (void *) ct);
       */
 
-      pipe_buffer_reference(screen, &spt->buffer, NULL);
+      pipe_buffer_reference(screen, &ct->buffer, NULL);
+
+      for (i = 0; i < CELL_MAX_TEXTURE_LEVELS; i++) {
+         /* Unreference the tiled image buffer.
+          * It may not actually be deleted until a fence is hit.
+          */
+         if (ct->tiled_buffer[i]) {
+            ct->tiled_mapped[i] = NULL;
+            pipe_buffer_reference(screen, &ct->tiled_buffer[i], NULL);
+         }
+      }
 
-      FREE(spt);
+      FREE(ct);
    }
    *pt = NULL;
 }
 
 
-#if 0
+
+/**
+ * Convert image from linear layout to tiled layout.  4-byte pixels.
+ */
 static void
-cell_texture_update(struct pipe_context *pipe, struct pipe_texture *texture,
-                    uint face, uint levelsMask)
+twiddle_image_uint(uint w, uint h, uint tile_size, uint *dst,
+                   uint src_stride, const uint *src)
 {
-   /* XXX TO DO:  re-tile the texture data ... */
+   const uint tile_size2 = tile_size * tile_size;
+   const uint h_t = (h + tile_size - 1) / tile_size;
+   const uint w_t = (w + tile_size - 1) / tile_size;
 
-}
-#endif
+   uint it, jt;  /* tile counters */
+   uint i, j;    /* intra-tile counters */
 
+   src_stride /= 4; /* convert from bytes to pixels */
 
-static struct pipe_surface *
-cell_get_tex_surface(struct pipe_screen *screen,
-                     struct pipe_texture *pt,
-                     unsigned face, unsigned level, unsigned zslice,
-                     unsigned usage)
-{
-   struct pipe_winsys *ws = screen->winsys;
-   struct cell_texture *spt = cell_texture(pt);
-   struct pipe_surface *ps;
+   /* loop over dest tiles */
+   for (it = 0; it < h_t; it++) {
+      for (jt = 0; jt < w_t; jt++) {
+         /* start of dest tile: */
+         uint *tdst = dst + (it * w_t + jt) * tile_size2;
 
-   ps = ws->surface_alloc(ws);
-   if (ps) {
-      assert(ps->refcount);
-      assert(ps->winsys);
-      winsys_buffer_reference(ws, &ps->buffer, spt->buffer);
-      ps->format = pt->format;
-      ps->block = pt->block;
-      ps->width = pt->width[level];
-      ps->height = pt->height[level];
-      ps->nblocksx = pt->nblocksx[level];
-      ps->nblocksy = pt->nblocksy[level];
-      ps->stride = spt->stride[level];
-      ps->offset = spt->level_offset[level];
-      ps->usage = usage;
+         /* compute size of this tile (may be smaller than tile_size) */
+         /* XXX note: a compiler bug was found here. That's why the code
+          * looks as it does.
+          */
+         uint tile_width = w - jt * tile_size;
+         tile_width = MIN2(tile_width, tile_size);
+         uint tile_height = h - it * tile_size;
+         tile_height = MIN2(tile_height, tile_size);
 
-      /* XXX may need to override usage flags (see sp_texture.c) */
+         /* loop over texels in the tile */
+         for (i = 0; i < tile_height; i++) {
+            for (j = 0; j < tile_width; j++) {
+               const uint srci = it * tile_size + i;
+               const uint srcj = jt * tile_size + j;
+               ASSERT(srci < h);
+               ASSERT(srcj < w);
+               tdst[i * tile_size + j] = src[srci * src_stride + srcj];
+            }
+         }
+      }
+   }
+}
 
-      pipe_texture_reference(&ps->texture, pt); 
-      ps->face = face;
-      ps->level = level;
-      ps->zslice = zslice;
 
-      if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
-	 ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
-		       ps->nblocksy *
-		       ps->stride;
-      }
-      else {
-	 assert(face == 0);
-	 assert(zslice == 0);
+/**
+ * For Cell.  Basically, rearrange the pixels/quads from this layout:
+ *  +--+--+--+--+
+ *  |p0|p1|p2|p3|....
+ *  +--+--+--+--+
+ *
+ * to this layout:
+ *  +--+--+
+ *  |p0|p1|....
+ *  +--+--+
+ *  |p2|p3|
+ *  +--+--+
+ */
+static void
+twiddle_tile(const uint *tileIn, uint *tileOut)
+{
+   int y, x;
+
+   for (y = 0; y < TILE_SIZE; y+=2) {
+      for (x = 0; x < TILE_SIZE; x+=2) {
+         int k = 4 * (y/2 * TILE_SIZE/2 + x/2);
+         tileOut[y * TILE_SIZE + (x + 0)] = tileIn[k];
+         tileOut[y * TILE_SIZE + (x + 1)] = tileIn[k+1];
+         tileOut[(y + 1) * TILE_SIZE + (x + 0)] = tileIn[k+2];
+         tileOut[(y + 1) * TILE_SIZE + (x + 1)] = tileIn[k+3];
       }
    }
-   return ps;
 }
 
 
-
 /**
- * Copy tile data from linear layout to tiled layout.
- * XXX this should be rolled into the future surface-creation code.
- * XXX also need "untile" code...
+ * Convert image from tiled layout to linear layout.  4-byte pixels.
  */
 static void
-tile_copy_data(uint w, uint h, uint tile_size, uint *dst, const uint *src)
+untwiddle_image_uint(uint w, uint h, uint tile_size, uint *dst,
+                     uint dst_stride, const uint *src)
 {
    const uint tile_size2 = tile_size * tile_size;
-   const uint h_t = h / tile_size, w_t = w / tile_size;
-
+   const uint h_t = (h + tile_size - 1) / tile_size;
+   const uint w_t = (w + tile_size - 1) / tile_size;
+   uint *tile_buf;
    uint it, jt;  /* tile counters */
    uint i, j;    /* intra-tile counters */
 
-   /* loop over dest tiles */
+   dst_stride /= 4; /* convert from bytes to pixels */
+
+   tile_buf = align_malloc(tile_size * tile_size * 4, 16);
+   
+   /* loop over src tiles */
    for (it = 0; it < h_t; it++) {
       for (jt = 0; jt < w_t; jt++) {
-         /* start of dest tile: */
-         uint *tdst = dst + (it * w_t + jt) * tile_size2;
+         /* start of src tile: */
+         const uint *tsrc = src + (it * w_t + jt) * tile_size2;
+         
+         twiddle_tile(tsrc, tile_buf);
+         tsrc = tile_buf;
+
+         /* compute size of this tile (may be smaller than tile_size) */
+         /* XXX note: a compiler bug was found here. That's why the code
+          * looks as it does.
+          */
+         uint tile_width = w - jt * tile_size;
+         tile_width = MIN2(tile_width, tile_size);
+         uint tile_height = h - it * tile_size;
+         tile_height = MIN2(tile_height, tile_size);
+
          /* loop over texels in the tile */
-         for (i = 0; i < tile_size; i++) {
-            for (j = 0; j < tile_size; j++) {
-               const uint srci = it * tile_size + i;
-               const uint srcj = jt * tile_size + j;
-               *tdst++ = src[srci * w + srcj];
+         for (i = 0; i < tile_height; i++) {
+            for (j = 0; j < tile_width; j++) {
+               uint dsti = it * tile_size + i;
+               uint dstj = jt * tile_size + j;
+               ASSERT(dsti < h);
+               ASSERT(dstj < w);
+               dst[dsti * dst_stride + dstj] = tsrc[i * tile_size + j];
             }
          }
       }
    }
-}
 
+   align_free(tile_buf);
+}
 
 
 /**
  * Convert linear texture image data to tiled format for SPU usage.
- * XXX recast this in terms of pipe_surfaces (aka texture views).
  */
 static void
-cell_tile_texture(struct cell_context *cell,
-                  struct cell_texture *texture)
+cell_twiddle_texture(struct pipe_screen *screen,
+                     struct pipe_surface *surface)
 {
-   struct pipe_screen *screen = cell->pipe.screen;
-   uint face = 0, level = 0, zslice = 0;
-   struct pipe_surface *surf;
-   const uint w = texture->base.width[0], h = texture->base.height[0];
-   const uint *src;
-
-   /* temporary restrictions: */
-   assert(w >= TILE_SIZE);
-   assert(h >= TILE_SIZE);
-   assert(w % TILE_SIZE == 0);
-   assert(h % TILE_SIZE == 0);
-
-   surf = screen->get_tex_surface(screen, &texture->base, face, level, zslice,
-                                  PIPE_BUFFER_USAGE_CPU_WRITE);
-   ASSERT(surf);
-
-   src = (const uint *) pipe_surface_map(surf, PIPE_BUFFER_USAGE_CPU_WRITE);
-
-   if (texture->tiled_data) {
-      align_free(texture->tiled_data);
+#if 0 // XXX fix me
+   struct cell_texture *ct = cell_texture(surface->texture);
+   const uint level = surface->level;
+   const uint texWidth = ct->base.width[level];
+   const uint texHeight = ct->base.height[level];
+   const uint bufWidth = align(texWidth, TILE_SIZE);
+   const uint bufHeight = align(texHeight, TILE_SIZE);
+   const void *map = screen->surface_map(screen, surface, PIPE_BUFFER_USAGE_CPU_READ);
+   const uint *src = (const uint *) map;
+
+   switch (ct->base.format) {
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_S8Z24_UNORM:
+      {
+         int numFaces = ct->base.target == PIPE_TEXTURE_CUBE ? 6 : 1;
+         int offset = bufWidth * bufHeight * 4 * surface->face;
+         uint *dst;
+
+         if (!ct->tiled_buffer[level]) {
+            /* allocate buffer for tiled data now */
+            struct pipe_winsys *ws = screen->winsys;
+            uint bytes = bufWidth * bufHeight * 4 * numFaces;
+            ct->tiled_buffer[level] =
+               ws->buffer_create(ws, 16, PIPE_BUFFER_USAGE_PIXEL, bytes);
+            /* and map it */
+            ct->tiled_mapped[level] =
+               ws->buffer_map(ws, ct->tiled_buffer[level],
+                              PIPE_BUFFER_USAGE_GPU_READ);
+         }
+         dst = (uint *) ((ubyte *) ct->tiled_mapped[level] + offset);
+
+         twiddle_image_uint(texWidth, texHeight, TILE_SIZE, dst,
+                            surface->stride, src);
+      }
+      break;
+   default:
+      printf("Cell: twiddle unsupported texture format %s\n",
+             pf_name(ct->base.format));
    }
-   texture->tiled_data = align_malloc(w * h * 4, 16);
 
-   tile_copy_data(w, h, TILE_SIZE, texture->tiled_data, src);
+   screen->surface_unmap(screen, surface);
+#endif
+}
+
 
-   pipe_surface_unmap(surf);
+/**
+ * Convert SPU tiled texture image data to linear format for app usage.
+ */
+static void
+cell_untwiddle_texture(struct pipe_screen *screen,
+                     struct pipe_surface *surface)
+{
+#if 0 // XXX fix me
+   struct cell_texture *ct = cell_texture(surface->texture);
+   const uint level = surface->level;
+   const uint texWidth = ct->base.width[level];
+   const uint texHeight = ct->base.height[level];
+   const void *map = screen->surface_map(screen, surface, PIPE_BUFFER_USAGE_CPU_READ);
+   const uint *src = (const uint *) ((const ubyte *) map + surface->offset);
+
+   switch (ct->base.format) {
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+   case PIPE_FORMAT_S8Z24_UNORM:
+      {
+         int numFaces = ct->base.target == PIPE_TEXTURE_CUBE ? 6 : 1;
+         int offset = surface->stride * texHeight * 4 * surface->face;
+         uint *dst;
+
+         if (!ct->untiled_data[level]) {
+            ct->untiled_data[level] =
+               align_malloc(surface->stride * texHeight * 4 * numFaces, 16);
+         }
 
-   pipe_surface_reference(&surf, NULL);
+         dst = (uint *) ((ubyte *) ct->untiled_data[level] + offset);
+
+         untwiddle_image_uint(texWidth, texHeight, TILE_SIZE, dst,
+                              surface->stride, src);
+      }
+      break;
+   default:
+      {
+         ct->untiled_data[level] = NULL;
+         printf("Cell: untwiddle unsupported texture format %s\n",
+                pf_name(ct->base.format));
+      }
+   }
+
+   screen->surface_unmap(screen, surface);
+#endif
 }
 
 
-void
-cell_update_texture_mapping(struct cell_context *cell)
+static struct pipe_surface *
+cell_get_tex_surface(struct pipe_screen *screen,
+                     struct pipe_texture *pt,
+                     unsigned face, unsigned level, unsigned zslice,
+                     unsigned usage)
 {
-#if 0
-   uint face = 0, level = 0, zslice = 0;
+   struct cell_texture *ct = cell_texture(pt);
+   struct pipe_surface *ps;
+
+   ps = CALLOC_STRUCT(pipe_surface);
+   if (ps) {
+      ps->refcount = 1;
+      pipe_texture_reference(&ps->texture, pt);
+      ps->format = pt->format;
+      //ps->block = pt->block;
+      ps->width = pt->width[level];
+      ps->height = pt->height[level];
+      //ps->nblocksx = pt->nblocksx[level];
+      //ps->nblocksy = pt->nblocksy[level];
+      //ps->stride = ct->stride[level];
+      ps->offset = ct->level_offset[level];
+      ps->usage = usage;
+
+      /* XXX may need to override usage flags (see sp_texture.c) */
+
+      pipe_texture_reference(&ps->texture, pt); 
+      ps->face = face;
+      ps->level = level;
+      ps->zslice = zslice;
+
+      if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
+#if 0 // XXX fix me
+         ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
+            ps->nblocksy *
+            ps->stride;
 #endif
-   uint i;
+      }
+      else {
+         assert(face == 0);
+         assert(zslice == 0);
+      }
 
-   for (i = 0; i < CELL_MAX_SAMPLERS; i++) {
-      if (cell->texture[i])
-         cell_tile_texture(cell, cell->texture[i]);
+      if (ps->usage & PIPE_BUFFER_USAGE_CPU_READ) {
+         /* convert from tiled to linear layout */
+         cell_untwiddle_texture(screen, ps);
+      }
    }
+   return ps;
+}
 
-#if 0
-   if (cell->tex_surf && cell->tex_map) {
-      pipe_surface_unmap(cell->tex_surf);
-      cell->tex_map = NULL;
+
+static void 
+cell_tex_surface_release(struct pipe_screen *screen, 
+                         struct pipe_surface **s)
+{
+   struct cell_texture *ct = cell_texture((*s)->texture);
+   const uint level = (*s)->level;
+   struct pipe_surface *surf = *s;
+
+   if ((surf->usage & PIPE_BUFFER_USAGE_CPU_READ) && (ct->untiled_data[level]))
+   {
+      align_free(ct->untiled_data[level]);
+      ct->untiled_data[level] = NULL;
    }
 
-   /* XXX free old surface */
+   if ((ct->base.tex_usage & PIPE_TEXTURE_USAGE_SAMPLER) &&
+       (surf->usage & PIPE_BUFFER_USAGE_CPU_WRITE)) {
+      /* convert from linear to tiled layout */
+      cell_twiddle_texture(screen, surf);
+   }
 
-   cell->tex_surf = cell_get_tex_surface(&cell->pipe,
-                                         &cell->texture[0]->base,
-                                         face, level, zslice);
+   /* XXX if done rendering to teximage, re-tile */
 
-   cell->tex_map = pipe_surface_map(cell->tex_surf);
-#endif
+   if (--surf->refcount == 0) {
+      pipe_texture_reference(&surf->texture, NULL);
+      FREE(surf);
+   }
+   *s = NULL;
+}
+
+
+static struct pipe_transfer *
+cell_get_tex_transfer(struct pipe_screen *screen,
+                      struct pipe_texture *texture,
+                      unsigned face, unsigned level, unsigned zslice,
+                      enum pipe_transfer_usage usage,
+                      unsigned x, unsigned y, unsigned w, unsigned h)
+{
+   struct cell_texture *ct = cell_texture(texture);
+   struct cell_transfer *ctrans;
+   struct pipe_transfer *pt;
+
+   assert(texture);
+   assert(level <= texture->last_level);
+
+   ctrans = CALLOC_STRUCT(cell_transfer);
+   pt = &ctrans->base;
+   if (ctrans) {
+      pt->refcount = 1;
+      pipe_texture_reference(&pt->texture, texture);
+      pt->format = texture->format;
+      pt->block = texture->block;
+      pt->x = x;
+      pt->y = y;
+      pt->width = w;
+      pt->height = h;
+      pt->nblocksx = texture->nblocksx[level];
+      pt->nblocksy = texture->nblocksy[level];
+      pt->stride = ct->stride[level];
+      ctrans->offset = ct->level_offset[level];
+      pt->usage = usage;
+      pt->face = face;
+      pt->level = level;
+      pt->zslice = zslice;
+
+      if (texture->target == PIPE_TEXTURE_CUBE ||
+          texture->target == PIPE_TEXTURE_3D) {
+         ctrans->offset += ((texture->target == PIPE_TEXTURE_CUBE) ? face :
+                         zslice) * pt->nblocksy * pt->stride;
+      }
+      else {
+         assert(face == 0);
+         assert(zslice == 0);
+      }
+   }
+   return pt;
 }
 
 
 static void 
-cell_tex_surface_release(struct pipe_screen *screen, 
-                         struct pipe_surface **s)
+cell_tex_transfer_release(struct pipe_screen *screen, 
+                          struct pipe_transfer **t)
 {
+   struct cell_transfer *transfer = cell_transfer(*t);
    /* Effectively do the texture_update work here - if texture images
     * needed post-processing to put them into hardware layout, this is
-    * where it would happen.  For softpipe, nothing to do.
+    * where it would happen.  For cell, nothing to do.
     */
-   assert ((*s)->texture);
-   pipe_texture_reference(&(*s)->texture, NULL); 
-
-   screen->winsys->surface_release(screen->winsys, s);
+   assert (transfer->base.texture);
+   if (--transfer->base.refcount == 0) {
+      pipe_texture_reference(&transfer->base.texture, NULL);
+      FREE(transfer);
+   }
+   *t = NULL;
 }
 
 
 static void *
-cell_surface_map( struct pipe_screen *screen,
-                  struct pipe_surface *surface,
-                  unsigned flags )
+cell_transfer_map( struct pipe_screen *screen,
+                       struct pipe_transfer *transfer )
 {
    ubyte *map;
+   struct cell_texture *spt;
+   unsigned flags = 0;
 
-   if (flags & ~surface->usage) {
-      assert(0);
-      return NULL;
+   assert(transfer->texture);
+   spt = cell_texture(transfer->texture);
+
+   if (transfer->usage != PIPE_TRANSFER_READ) {
+      flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
    }
 
-   map = pipe_buffer_map( screen, surface->buffer, flags );
+   if (transfer->usage != PIPE_TRANSFER_WRITE) {
+      flags |= PIPE_BUFFER_USAGE_CPU_READ;
+   }
+
+   map = pipe_buffer_map(screen, spt->buffer, flags);
    if (map == NULL)
       return NULL;
 
    /* May want to different things here depending on read/write nature
     * of the map:
     */
-   if (surface->texture &&
-       (flags & PIPE_BUFFER_USAGE_CPU_WRITE)) 
+   if (transfer->texture && transfer->usage != PIPE_TRANSFER_READ) 
    {
       /* Do something to notify sharing contexts of a texture change.
-       * In softpipe, that would mean flushing the texture cache.
+       * In cell, that would mean flushing the texture cache.
        */
-#if 0
+#if 00
       cell_screen(screen)->timestamp++;
 #endif
    }
    
-   return map + surface->offset;
+   return map + cell_transfer(transfer)->offset +
+      transfer->y / transfer->block.height * transfer->stride +
+      transfer->x / transfer->block.width * transfer->block.size;
 }
 
 
 static void
-cell_surface_unmap(struct pipe_screen *screen,
-                   struct pipe_surface *surface)
+cell_transfer_unmap(struct pipe_screen *screen,
+                       struct pipe_transfer *transfer)
 {
-   pipe_buffer_unmap( screen, surface->buffer );
+   struct cell_texture *spt;
+
+   assert(transfer->texture);
+   spt = cell_texture(transfer->texture);
+
+   pipe_buffer_unmap( screen, spt->buffer );
 }
 
 
-void
-cell_init_texture_functions(struct cell_context *cell)
+static void *
+cell_surface_map(struct pipe_screen *screen,
+                 struct pipe_surface *surface,
+                 unsigned flags)
 {
-   /*cell->pipe.texture_update = cell_texture_update;*/
+   ubyte *map;
+   struct cell_texture *ct = cell_texture(surface->texture);
+   const uint level = surface->level;
+
+   assert(ct);
+
+#if 0
+   if (flags & ~surface->usage) {
+      assert(0);
+      return NULL;
+   }
+#endif
+
+   map = pipe_buffer_map( screen, ct->buffer, flags );
+   if (map == NULL) {
+      return NULL;
+   }
+   else {
+      if ((surface->usage & PIPE_BUFFER_USAGE_CPU_READ) &&
+          (ct->untiled_data[level])) {
+         return (void *) ((ubyte *) ct->untiled_data[level] + surface->offset);
+      }
+      else {
+         return (void *) (map + surface->offset);
+      }
+   }
 }
 
 
+static void
+cell_surface_unmap(struct pipe_screen *screen,
+                   struct pipe_surface *surface)
+{
+   struct cell_texture *ct = cell_texture(surface->texture);
+
+   assert(ct);
+
+   pipe_buffer_unmap( screen, ct->buffer );
+}
+
+
+
 void
 cell_init_screen_texture_funcs(struct pipe_screen *screen)
 {
@@ -382,6 +653,8 @@ cell_init_screen_texture_funcs(struct pipe_screen *screen)
    screen->get_tex_surface = cell_get_tex_surface;
    screen->tex_surface_release = cell_tex_surface_release;
 
-   screen->surface_map = cell_surface_map;
-   screen->surface_unmap = cell_surface_unmap;
+   screen->get_tex_transfer = cell_get_tex_transfer;
+   screen->tex_transfer_release = cell_tex_transfer_release;
+   screen->transfer_map = cell_transfer_map;
+   screen->transfer_unmap = cell_transfer_unmap;
 }