gallium: Create OGL state tracker wrappers for various CPU access operations.

There are two usage types of buffer CPU accesses:
One where we try to use the buffer contents for multiple draw commands in
a batch. (batch := sequence of commands that are flushed together),
like incrementally adding bitmaps to a bitmap texture that is reallocated
on flush.
And one where we assume we can safely overwrite the old buffer contexts, like
glTexSubImage. In this case we need to make sure all old drawing commands
referencing the buffer are flushed before we map the buffer.
This is easily forgotten.

Add wrappers for the most common of these operations. The first type is
prefixed with "st_no_flush" and the second type is prefixed with
"st_cond_flush", where "cond" indicates that we attmpt to only flush
if there is indeed unflushed draw commands referencing the buffer.

Prefixed functions are
screen::get_tex_transfer
pipe_buffer_write
pipe_buffer_read
pipe_buffer_map

Please use the wrappers whenever possible.

Signed-off-by: Thomas Hellstrom <thellstrom-at-vmware-dot-com>

13 files changed, 265 insertions, 173 deletions

diff --git a/src/mesa/state_tracker/st_atom_constbuf.c b/src/mesa/state_tracker/st_atom_constbuf.c
index fd81ac36d2c..ec3605e4d6f 100644
--- a/src/mesa/state_tracker/st_atom_constbuf.c
+++ b/src/mesa/state_tracker/st_atom_constbuf.c
@@ -42,7 +42,7 @@
 #include "st_atom.h"
 #include "st_atom_constbuf.h"
 #include "st_program.h"
-
+#include "st_inlines.h"
 
 /**
  * Pass the given program parameters to the graphics pipe as a
@@ -86,9 +86,9 @@ void st_upload_constants( struct st_context *st,
 
       /* load Mesa constants into the constant buffer */
       if (cbuf->buffer)
-         pipe_buffer_write(pipe->screen, cbuf->buffer, 
-                           0, paramBytes, 
-                           params->ParameterValues);
+         st_no_flush_pipe_buffer_write(st, cbuf->buffer,
+				       0, paramBytes,
+				       params->ParameterValues);
 
       st->pipe->set_constant_buffer(st->pipe, id, 0, cbuf);
    }
diff --git a/src/mesa/state_tracker/st_atom_pixeltransfer.c b/src/mesa/state_tracker/st_atom_pixeltransfer.c
index e0bbf7f3bee..eff3666ca88 100644
--- a/src/mesa/state_tracker/st_atom_pixeltransfer.c
+++ b/src/mesa/state_tracker/st_atom_pixeltransfer.c
@@ -45,6 +45,7 @@
 #include "st_format.h"
 #include "st_program.h"
 #include "st_texture.h"
+#include "st_inlines.h"
 
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
@@ -147,8 +148,9 @@ load_color_map_texture(GLcontext *ctx, struct pipe_texture *pt)
    uint *dest;
    uint i, j;
 
-   transfer = screen->get_tex_transfer(screen, pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
-                                       0, 0, texSize, texSize);
+   transfer = st_cond_flush_get_tex_transfer(st_context(ctx),
+					     pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
+					     0, 0, texSize, texSize);
    dest = (uint *) screen->transfer_map(screen, transfer);
 
    /* Pack four 1D maps into a 2D texture:
diff --git a/src/mesa/state_tracker/st_cb_accum.c b/src/mesa/state_tracker/st_cb_accum.c
index 1510a1e2361..7f793cf08db 100644
--- a/src/mesa/state_tracker/st_cb_accum.c
+++ b/src/mesa/state_tracker/st_cb_accum.c
@@ -41,6 +41,7 @@
 #include "st_public.h"
 #include "st_format.h"
 #include "st_texture.h"
+#include "st_inlines.h"
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
@@ -119,12 +120,10 @@ st_clear_accum_buffer(GLcontext *ctx, struct gl_renderbuffer *rb)
    const GLint height = ctx->DrawBuffer->_Ymax - ypos;
    GLubyte *map;
 
-   st_teximage_flush_before_map(ctx->st, acc_strb->texture, 0, 0,
-				PIPE_TRANSFER_WRITE);
-
-   acc_pt = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                     PIPE_TRANSFER_WRITE, xpos, ypos,
-                                     width, height);
+   acc_pt = st_cond_flush_get_tex_transfer(st_context(ctx), acc_strb->texture,
+					   0, 0, 0,
+					   PIPE_TRANSFER_WRITE, xpos, ypos,
+					   width, height);
    map = screen->transfer_map(screen, acc_pt);
 
    /* note acc_strb->format might not equal acc_pt->format */
@@ -167,12 +166,11 @@ accum_mad(GLcontext *ctx, GLfloat scale, GLfloat bias,
    struct pipe_transfer *acc_pt;
    GLubyte *map;
 
-   st_teximage_flush_before_map(ctx->st, acc_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ_WRITE);
-
-   acc_pt = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                     PIPE_TRANSFER_READ_WRITE, xpos, ypos,
-                                     width, height);
+   acc_pt = st_cond_flush_get_tex_transfer(st_context(ctx), acc_strb->texture,
+					   0, 0, 0,
+					   PIPE_TRANSFER_READ_WRITE,
+					   xpos, ypos,
+					   width, height);
    map = screen->transfer_map(screen, acc_pt);
 
    /* note acc_strb->format might not equal acc_pt->format */
@@ -210,19 +208,14 @@ accum_accum(struct st_context *st, GLfloat value,
    GLfloat *colorBuf, *accBuf;
    GLint i;
 
-   st_teximage_flush_before_map(st, acc_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
-
-   acc_trans = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                        PIPE_TRANSFER_READ, xpos, ypos,
-                                        width, height);
-
-   st_teximage_flush_before_map(st, color_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
+   acc_trans = st_cond_flush_get_tex_transfer(st, acc_strb->texture, 0, 0, 0,
+					      PIPE_TRANSFER_READ, xpos, ypos,
+					      width, height);
 
-   color_trans = screen->get_tex_transfer(screen, color_strb->texture, 0, 0, 0,
-                                          PIPE_TRANSFER_READ, xpos, ypos,
-                                          width, height);
+   color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
+						0, 0, 0,
+						PIPE_TRANSFER_READ, xpos, ypos,
+						width, height);
 
    colorBuf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
    accBuf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
@@ -235,9 +228,9 @@ accum_accum(struct st_context *st, GLfloat value,
    }
 
    screen->tex_transfer_destroy(acc_trans);
-   acc_trans = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                        PIPE_TRANSFER_WRITE, xpos, ypos,
-                                        width, height);
+   acc_trans = st_no_flush_get_tex_transfer(st, acc_strb->texture, 0, 0, 0,
+					    PIPE_TRANSFER_WRITE, xpos, ypos,
+					    width, height);
 
    acc_put_tile_rgba(pipe, acc_trans, 0, 0, width, height, accBuf);
 
@@ -260,19 +253,14 @@ accum_load(struct st_context *st, GLfloat value,
    GLfloat *buf;
    GLint i;
 
-   st_teximage_flush_before_map(st, acc_strb->texture, 0, 0,
-				PIPE_TRANSFER_WRITE);
+   acc_trans = st_cond_flush_get_tex_transfer(st, acc_strb->texture, 0, 0, 0,
+					      PIPE_TRANSFER_WRITE, xpos, ypos,
+					      width, height);
 
-   acc_trans = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                        PIPE_TRANSFER_WRITE, xpos, ypos,
-                                        width, height);
-
-   st_teximage_flush_before_map(st, color_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
-
-   color_trans = screen->get_tex_transfer(screen, color_strb->texture, 0, 0, 0,
-                                        PIPE_TRANSFER_READ, xpos, ypos,
-                                        width, height);
+   color_trans = st_cond_flush_get_tex_transfer(st, color_strb->texture,
+						0, 0, 0,
+						PIPE_TRANSFER_READ, xpos, ypos,
+						width, height);
 
    buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
 
@@ -305,19 +293,16 @@ accum_return(GLcontext *ctx, GLfloat value,
 
    abuf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
 
-   st_teximage_flush_before_map(ctx->st, acc_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
-
-   acc_trans = screen->get_tex_transfer(screen, acc_strb->texture, 0, 0, 0,
-                                        PIPE_TRANSFER_READ, xpos, ypos,
-                                        width, height);
-
-   st_teximage_flush_before_map(ctx->st, color_strb->texture, 0, 0,
-				PIPE_TRANSFER_READ_WRITE);
+   acc_trans = st_cond_flush_get_tex_transfer(st_context(ctx),
+					      acc_strb->texture, 0, 0, 0,
+					      PIPE_TRANSFER_READ, xpos, ypos,
+					      width, height);
 
-   color_trans = screen->get_tex_transfer(screen, color_strb->texture, 0, 0, 0,
-                                          PIPE_TRANSFER_READ_WRITE, xpos, ypos,
-                                          width, height);
+   color_trans = st_cond_flush_get_tex_transfer(st_context(ctx),
+						color_strb->texture, 0, 0, 0,
+						PIPE_TRANSFER_READ_WRITE,
+						xpos, ypos,
+						width, height);
 
    acc_get_tile_rgba(pipe, acc_trans, 0, 0, width, height, abuf);
 
diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index fa4f4082a78..31ff1f74c06 100644
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -47,6 +47,8 @@
 #include "st_cb_program.h"
 #include "st_mesa_to_tgsi.h"
 #include "st_texture.h"
+#include "st_inlines.h"
+
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
@@ -337,8 +339,9 @@ make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height,
       return NULL;
    }
 
-   transfer = screen->get_tex_transfer(screen, pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
-                                       0, 0, width, height);
+   transfer = st_no_flush_get_tex_transfer(st_context(ctx), pt, 0, 0, 0,
+					   PIPE_TRANSFER_WRITE,
+					   0, 0, width, height);
 
    dest = screen->transfer_map(screen, transfer);
 
@@ -425,11 +428,11 @@ setup_bitmap_vertex_data(struct st_context *st,
    }
 
    /* put vertex data into vbuf */
-   pipe_buffer_write(pipe->screen, 
-                     st->bitmap.vbuf, 
-                     st->bitmap.vbuf_slot * sizeof st->bitmap.vertices,
-                     sizeof st->bitmap.vertices,
-                     st->bitmap.vertices);
+   st_no_flush_pipe_buffer_write(st,
+				 st->bitmap.vbuf,
+				 st->bitmap.vbuf_slot * sizeof st->bitmap.vertices,
+				 sizeof st->bitmap.vertices,
+				 st->bitmap.vertices);
 
    return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices;
 }
@@ -584,10 +587,10 @@ reset_cache(struct st_context *st)
    /* Map the texture transfer.
     * Subsequent glBitmap calls will write into the texture image.
     */
-   cache->trans = screen->get_tex_transfer(screen, cache->texture, 0, 0, 0,
-                                           PIPE_TRANSFER_WRITE, 0, 0,
-                                           BITMAP_CACHE_WIDTH,
-                                           BITMAP_CACHE_HEIGHT);
+   cache->trans = st_no_flush_get_tex_transfer(st, cache->texture, 0, 0, 0,
+					       PIPE_TRANSFER_WRITE, 0, 0,
+					       BITMAP_CACHE_WIDTH,
+					       BITMAP_CACHE_HEIGHT);
    cache->buffer = screen->transfer_map(screen, cache->trans);
 
    /* init image to all 0xff */
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
index fdb800fbd0f..1025265cb94 100644
--- a/src/mesa/state_tracker/st_cb_bufferobjects.c
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.c
@@ -30,9 +30,9 @@
 #include "main/mtypes.h"
 #include "main/bufferobj.h"
 
+#include "st_inlines.h"
 #include "st_context.h"
 #include "st_cb_bufferobjects.h"
-#include "st_public.h"
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
@@ -98,16 +98,13 @@ st_bufferobj_subdata(GLcontext *ctx,
 		     GLsizeiptrARB size,
 		     const GLvoid * data, struct gl_buffer_object *obj)
 {
-   struct pipe_context *pipe = st_context(ctx)->pipe;
    struct st_buffer_object *st_obj = st_buffer_object(obj);
 
    if (offset >= st_obj->size || size > (st_obj->size - offset))
       return;
 
-   if (pipe->is_buffer_referenced(pipe, st_obj->buffer))
-      st_flush(st_context(ctx), PIPE_FLUSH_RENDER_CACHE, NULL);
-
-   pipe_buffer_write(pipe->screen, st_obj->buffer, offset, size, data);
+   st_cond_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer,
+				   offset, size, data);
 }
 
 
@@ -121,17 +118,13 @@ st_bufferobj_get_subdata(GLcontext *ctx,
                          GLsizeiptrARB size,
                          GLvoid * data, struct gl_buffer_object *obj)
 {
-   struct pipe_context *pipe = st_context(ctx)->pipe;
    struct st_buffer_object *st_obj = st_buffer_object(obj);
 
    if (offset >= st_obj->size || size > (st_obj->size - offset))
       return;
 
-   if (pipe->is_buffer_referenced(pipe, st_obj->buffer) &
-       PIPE_REFERENCED_FOR_WRITE)
-      st_flush(st_context(ctx), PIPE_FLUSH_RENDER_CACHE, NULL);
-
-   pipe_buffer_read(pipe->screen, st_obj->buffer, offset, size, data);
+   st_cond_flush_pipe_buffer_read(st_context(ctx), st_obj->buffer,
+				  offset, size, data);
 }
 
 
@@ -179,7 +172,8 @@ st_bufferobj_data(GLcontext *ctx,
    st_obj->size = size;
 
    if (data)
-      pipe_buffer_write(pipe->screen, st_obj->buffer, 0, size, data);
+      st_no_flush_pipe_buffer_write(st_context(ctx), st_obj->buffer, 0,
+				    size, data);
 }
 
 
@@ -190,10 +184,8 @@ static void *
 st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
                  struct gl_buffer_object *obj)
 {
-   struct pipe_context *pipe = st_context(ctx)->pipe;
    struct st_buffer_object *st_obj = st_buffer_object(obj);
    GLuint flags;
-   unsigned referenced;
 
    switch (access) {
    case GL_WRITE_ONLY:
@@ -209,12 +201,9 @@ st_bufferobj_map(GLcontext *ctx, GLenum target, GLenum access,
       break;      
    }
 
-   referenced = pipe->is_buffer_referenced(pipe, st_obj->buffer);
-   if (referenced && ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
-		      (flags & PIPE_BUFFER_USAGE_CPU_WRITE)))
-      st_flush(st_context(ctx), PIPE_FLUSH_RENDER_CACHE, NULL);
-
-   obj->Pointer = pipe_buffer_map(pipe->screen, st_obj->buffer, flags);
+   obj->Pointer = st_cond_flush_pipe_buffer_map(st_context(ctx),
+						st_obj->buffer,
+						flags);
    if(obj->Pointer) {
       obj->Offset = 0;
       obj->Length = obj->Size;
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 5bdc6a13309..880e83108c1 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -45,6 +45,7 @@
 #include "st_program.h"
 #include "st_public.h"
 #include "st_mesa_to_tgsi.h"
+#include "st_inlines.h"
 
 #include "pipe/p_context.h"
 #include "pipe/p_inlines.h"
@@ -166,10 +167,10 @@ draw_quad(GLcontext *ctx,
    }
 
    /* put vertex data into vbuf */
-   pipe_buffer_write(pipe->screen, st->clear.vbuf, 
-                     st->clear.vbuf_slot * sizeof(st->clear.vertices),
-                     sizeof(st->clear.vertices),
-                     st->clear.vertices);
+   st_no_flush_pipe_buffer_write(st, st->clear.vbuf,
+				 st->clear.vbuf_slot * sizeof(st->clear.vertices),
+				 sizeof(st->clear.vertices),
+				 st->clear.vertices);
 
    /* draw */
    util_draw_vertex_buffer(pipe, 
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index c67b026413e..acc9240b5d0 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -53,6 +53,8 @@
 #include "st_format.h"
 #include "st_mesa_to_tgsi.h"
 #include "st_texture.h"
+#include "st_inlines.h"
+
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_inlines.h"
@@ -368,9 +370,9 @@ make_texture(struct st_context *st,
       /* we'll do pixel transfer in a fragment shader */
       ctx->_ImageTransferState = 0x0;
 
-      transfer = screen->get_tex_transfer(screen, pt, 0, 0, 0,
-                                          PIPE_TRANSFER_WRITE, 0, 0,
-                                          width, height);
+      transfer = st_no_flush_get_tex_transfer(st, pt, 0, 0, 0,
+					      PIPE_TRANSFER_WRITE, 0, 0,
+					      width, height);
 
       /* map texture transfer */
       dest = screen->transfer_map(screen, transfer);
@@ -490,7 +492,7 @@ draw_quad(GLcontext *ctx, GLfloat x0, GLfloat y0, GLfloat z,
       /* allocate/load buffer object with vertex data */
       buf = pipe_buffer_create(pipe->screen, 32, PIPE_BUFFER_USAGE_VERTEX,
                                sizeof(verts));
-      pipe_buffer_write(pipe->screen, buf, 0, sizeof(verts), verts);
+      st_no_flush_pipe_buffer_write(st, buf, 0, sizeof(verts), verts);
 
       util_draw_vertex_buffer(pipe, buf, 0,
                               PIPE_PRIM_QUADS,
@@ -638,12 +640,9 @@ draw_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
       y = ctx->DrawBuffer->Height - y - height;
    }
 
-   st_teximage_flush_before_map(ctx->st, strb->texture, 0, 0,
-				PIPE_TRANSFER_WRITE);
-
-   pt = screen->get_tex_transfer(screen, strb->texture, 0, 0, 0,
-                                 PIPE_TRANSFER_WRITE, x, y,
-                                 width, height);
+   pt = st_cond_flush_get_tex_transfer(st_context(ctx), strb->texture, 0, 0, 0,
+				       PIPE_TRANSFER_WRITE, x, y,
+				       width, height);
 
    stmap = screen->transfer_map(screen, pt);
 
@@ -826,12 +825,10 @@ copy_stencil_pixels(GLcontext *ctx, GLint srcx, GLint srcy,
                           GL_STENCIL_INDEX, GL_UNSIGNED_BYTE,
                           &ctx->DefaultPacking, buffer);
 
-   st_teximage_flush_before_map(ctx->st, rbDraw->texture, 0, 0,
-				PIPE_TRANSFER_WRITE);
-
-   ptDraw = screen->get_tex_transfer(screen, rbDraw->texture, 0, 0, 0,
-                                     PIPE_TRANSFER_WRITE, dstx, dsty,
-                                     width, height);
+   ptDraw = st_cond_flush_get_tex_transfer(st_context(ctx),
+					   rbDraw->texture, 0, 0, 0,
+					   PIPE_TRANSFER_WRITE, dstx, dsty,
+					   width, height);
 
    assert(ptDraw->block.width == 1);
    assert(ptDraw->block.height == 1);
@@ -907,9 +904,6 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
    GLfloat *color;
    enum pipe_format srcFormat, texFormat;
 
-   /* make sure rendering has completed */
-   pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
-
    st_validate_state(st);
 
    if (type == GL_STENCIL) {
@@ -981,13 +975,13 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
    else {
       /* CPU-based fallback/conversion */
       struct pipe_transfer *ptRead =
-         screen->get_tex_transfer(screen, rbRead->texture, 0, 0, 0,
-                                  PIPE_TRANSFER_READ, srcx, srcy, width,
-                                  height);
+         st_cond_flush_get_tex_transfer(st, rbRead->texture, 0, 0, 0,
+					PIPE_TRANSFER_READ, srcx, srcy, width,
+					height);
 
       struct pipe_transfer *ptTex =
-         screen->get_tex_transfer(screen, pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
-                                  0, 0, width, height);
+         st_cond_flush_get_tex_transfer(st, pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
+					0, 0, width, height);
 
       if (type == GL_COLOR) {
          /* alternate path using get/put_tile() */
diff --git a/src/mesa/state_tracker/st_cb_readpixels.c b/src/mesa/state_tracker/st_cb_readpixels.c
index 519ad6660f6..85adcb785ee 100644
--- a/src/mesa/state_tracker/st_cb_readpixels.c
+++ b/src/mesa/state_tracker/st_cb_readpixels.c
@@ -50,6 +50,7 @@
 #include "st_format.h"
 #include "st_public.h"
 #include "st_texture.h"
+#include "st_inlines.h"
 
 /**
  * Special case for reading stencil buffer.
@@ -75,11 +76,10 @@ st_read_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
 
    /* Create a read transfer from the renderbuffer's texture */
 
-   st_teximage_flush_before_map(ctx->st, strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
-
-   pt = screen->get_tex_transfer(screen, strb->texture,  0, 0, 0,
-                                 PIPE_TRANSFER_READ, x, y, width, height);
+   pt = st_cond_flush_get_tex_transfer(st_context(ctx), strb->texture,
+				       0, 0, 0,
+				       PIPE_TRANSFER_READ, x, y,
+				       width, height);
 
    /* map the stencil buffer */
    stmap = screen->transfer_map(screen, pt);
@@ -245,11 +245,10 @@ st_fast_readpixels(GLcontext *ctx, struct st_renderbuffer *strb,
          y = strb->texture->height[0] - y - height;
       }
 
-      st_teximage_flush_before_map(ctx->st, strb->texture, 0, 0,
-				   PIPE_TRANSFER_READ);
-
-      trans = screen->get_tex_transfer(screen, strb->texture, 0, 0, 0,
-                                       PIPE_TRANSFER_READ, x, y, width, height);
+      trans = st_cond_flush_get_tex_transfer(st_context(ctx), strb->texture,
+					     0, 0, 0,
+					     PIPE_TRANSFER_READ, x, y,
+					     width, height);
       if (!trans) {
          return GL_FALSE;
       }
@@ -358,9 +357,6 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
    if (!dest)
       return;
 
-   /* make sure rendering has completed */
-   st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
-
    if (format == GL_STENCIL_INDEX ||
        format == GL_DEPTH_STENCIL) {
       st_read_stencil_pixels(ctx, x, y, width, height,
@@ -403,8 +399,10 @@ st_readpixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
    }
 
    /* Create a read transfer from the renderbuffer's texture */
-   trans = screen->get_tex_transfer(screen, strb->texture,  0, 0, 0,
-                                    PIPE_TRANSFER_READ, x, y, width, height);
+   trans = st_cond_flush_get_tex_transfer(st_context(ctx), strb->texture,
+					  0, 0, 0,
+					  PIPE_TRANSFER_READ, x, y,
+					  width, height);
 
    /* determine bottom-to-top vs. top-to-bottom order */
    if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 98dc6ec74d1..94e340b7e94 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -50,6 +50,7 @@
 #include "state_tracker/st_public.h"
 #include "state_tracker/st_texture.h"
 #include "state_tracker/st_gen_mipmap.h"
+#include "state_tracker/st_inlines.h"
 
 #include "pipe/p_context.h"
 #include "pipe/p_defines.h"
@@ -465,10 +466,10 @@ compress_with_blit(GLcontext * ctx,
 
    /* Put user's tex data into the temporary texture
     */
-   tex_xfer = screen->get_tex_transfer(screen, src_tex,
-                                       face, level, 0,
-                                       PIPE_TRANSFER_WRITE,
-                                       0, 0, width, height); /* x, y, w, h */
+   tex_xfer = st_cond_flush_get_tex_transfer(st_context(ctx), src_tex,
+					     face, level, 0,
+					     PIPE_TRANSFER_WRITE,
+					     0, 0, width, height); /* x, y, w, h */
    map = screen->transfer_map(screen, tex_xfer);
 
    mesa_format->StoreImage(ctx, 2, GL_RGBA, mesa_format,
@@ -858,9 +859,10 @@ decompress_with_blit(GLcontext * ctx, GLenum target, GLint level,
                         PIPE_TEX_MIPFILTER_NEAREST);
 
    /* map the dst_surface so we can read from it */
-   tex_xfer = screen->get_tex_transfer(screen, dst_texture, 0, 0, 0,
-                                       PIPE_TRANSFER_READ,
-                                       0, 0, width, height);
+   tex_xfer = st_cond_flush_get_tex_transfer(st_context(ctx),
+					     dst_texture, 0, 0, 0,
+					     PIPE_TRANSFER_READ,
+					     0, 0, width, height);
 
    pixels = _mesa_map_readpix_pbo(ctx, &ctx->Pack, pixels);
 
@@ -1192,15 +1194,12 @@ fallback_copy_texsubimage(GLcontext *ctx, GLenum target, GLint level,
       srcY = strb->Base.Height - srcY - height;
    }
 
-   st_teximage_flush_before_map(ctx->st, strb->texture, 0, 0,
-				PIPE_TRANSFER_READ);
-
-   src_trans = screen->get_tex_transfer( screen,
-                                         strb->texture,
-                                         0, 0, 0,
-                                         PIPE_TRANSFER_READ,
-                                         srcX, srcY,
-                                         width, height);
+   src_trans = st_cond_flush_get_tex_transfer( st_context(ctx),
+					       strb->texture,
+					       0, 0, 0,
+					       PIPE_TRANSFER_READ,
+					       srcX, srcY,
+					       width, height);
 
    st_teximage_flush_before_map(ctx->st, stImage->pt, 0, 0,
 				PIPE_TRANSFER_WRITE);
@@ -1589,7 +1588,7 @@ copy_image_data_to_texture(struct st_context *st,
 				   PIPE_TRANSFER_WRITE);
 
 
-      st_texture_image_data(st->pipe,
+      st_texture_image_data(st,
                             stObj->pt,
                             stImage->face,
                             dstLevel,
diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c
index 6e9aa5245e2..e159b4c9db5 100644
--- a/src/mesa/state_tracker/st_gen_mipmap.c
+++ b/src/mesa/state_tracker/st_gen_mipmap.c
@@ -47,6 +47,7 @@
 #include "st_program.h"
 #include "st_texture.h"
 #include "st_cb_texture.h"
+#include "st_inlines.h"
 
 
 /**
@@ -123,21 +124,17 @@ fallback_generate_mipmap(GLcontext *ctx, GLenum target,
       const ubyte *srcData;
       ubyte *dstData;
 
-      st_teximage_flush_before_map(ctx->st, pt, face, srcLevel,
-				   PIPE_TRANSFER_READ);
-
-      srcTrans = screen->get_tex_transfer(screen, pt, face, srcLevel, zslice,
-                                          PIPE_TRANSFER_READ, 0, 0,
-                                          pt->width[srcLevel],
-                                          pt->height[srcLevel]);
-
-      st_teximage_flush_before_map(ctx->st, pt, face, dstLevel,
-				   PIPE_TRANSFER_WRITE);
-
-      dstTrans = screen->get_tex_transfer(screen, pt, face, dstLevel, zslice,
-                                          PIPE_TRANSFER_WRITE, 0, 0,
-                                          pt->width[dstLevel],
-                                          pt->height[dstLevel]);
+      srcTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
+						srcLevel, zslice,
+						PIPE_TRANSFER_READ, 0, 0,
+						pt->width[srcLevel],
+						pt->height[srcLevel]);
+
+      dstTrans = st_cond_flush_get_tex_transfer(st_context(ctx), pt, face,
+						dstLevel, zslice,
+						PIPE_TRANSFER_WRITE, 0, 0,
+						pt->width[dstLevel],
+						pt->height[dstLevel]);
 
       srcData = (ubyte *) screen->transfer_map(screen, srcTrans);
       dstData = (ubyte *) screen->transfer_map(screen, dstTrans);
diff --git a/src/mesa/state_tracker/st_inlines.h b/src/mesa/state_tracker/st_inlines.h
new file mode 100644
index 00000000000..0322d5dfa6e
--- /dev/null
+++ b/src/mesa/state_tracker/st_inlines.h
@@ -0,0 +1,122 @@
+#ifndef ST_INLINES_H
+#define ST_INLINES_H
+
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_state.h"
+
+#include "st_context.h"
+#include "st_texture.h"
+#include "st_public.h"
+
+static INLINE struct pipe_transfer *
+st_cond_flush_get_tex_transfer(struct st_context *st,
+			       struct pipe_texture *pt,
+			       unsigned int face,
+			       unsigned int level,
+			       unsigned int zslice,
+			       enum pipe_transfer_usage usage,
+			       unsigned int x, unsigned int y,
+			       unsigned int w, unsigned int h)
+{
+   struct pipe_screen *screen = st->pipe->screen;
+
+   st_teximage_flush_before_map(st, pt, face, level, usage);
+   return screen->get_tex_transfer(screen, pt, face, level, zslice, usage,
+				   x, y, w, h);
+}
+
+static INLINE struct pipe_transfer *
+st_no_flush_get_tex_transfer(struct st_context *st,
+			     struct pipe_texture *pt,
+			     unsigned int face,
+			     unsigned int level,
+			     unsigned int zslice,
+			     enum pipe_transfer_usage usage,
+			     unsigned int x, unsigned int y,
+			     unsigned int w, unsigned int h)
+{
+   struct pipe_screen *screen = st->pipe->screen;
+
+   return screen->get_tex_transfer(screen, pt, face, level,
+				   zslice, usage, x, y, w, h);
+}
+
+static INLINE void *
+st_cond_flush_pipe_buffer_map(struct st_context *st,
+			      struct pipe_buffer *buf,
+			      unsigned int map_flags)
+{
+   struct pipe_context *pipe = st->pipe;
+   unsigned int referenced = pipe->is_buffer_referenced(pipe, buf);
+
+   if (referenced && ((referenced & PIPE_REFERENCED_FOR_WRITE) ||
+		      (map_flags & PIPE_BUFFER_USAGE_CPU_WRITE)))
+      st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   return pipe_buffer_map(pipe->screen, buf, map_flags);
+}
+
+static INLINE void *
+st_no_flush_pipe_buffer_map(struct st_context *st,
+			    struct pipe_buffer *buf,
+			    unsigned int map_flags)
+{
+   return pipe_buffer_map(st->pipe->screen, buf, map_flags);
+}
+
+
+static INLINE void
+st_cond_flush_pipe_buffer_write(struct st_context *st,
+				struct pipe_buffer *buf,
+				unsigned int offset,
+				unsigned int size,
+				const void * data)
+{
+   struct pipe_context *pipe = st->pipe;
+
+   if (pipe->is_buffer_referenced(pipe, buf))
+      st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   pipe_buffer_write(pipe->screen, buf, offset, size, data);
+}
+
+static INLINE void
+st_no_flush_pipe_buffer_write(struct st_context *st,
+			      struct pipe_buffer *buf,
+			      unsigned int offset,
+			      unsigned int size,
+			      const void * data)
+{
+   pipe_buffer_write(st->pipe->screen, buf, offset, size, data);
+}
+
+static INLINE void
+st_cond_flush_pipe_buffer_read(struct st_context *st,
+			       struct pipe_buffer *buf,
+			       unsigned int offset,
+			       unsigned int size,
+			       void * data)
+{
+   struct pipe_context *pipe = st->pipe;
+
+   if (pipe->is_buffer_referenced(pipe, buf) & PIPE_REFERENCED_FOR_WRITE)
+      st_flush(st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   pipe_buffer_read(pipe->screen, buf, offset, size, data);
+}
+
+static INLINE void
+st_no_flush_pipe_buffer_read(struct st_context *st,
+			     struct pipe_buffer *buf,
+			     unsigned int offset,
+			     unsigned int size,
+			     void * data)
+{
+   pipe_buffer_read(st->pipe->screen, buf, offset, size, data);
+}
+
+#endif
+
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index fcbaeb69894..10faa633ea8 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -30,6 +30,7 @@
 #include "st_public.h"
 #include "st_texture.h"
 #include "st_cb_fbo.h"
+#include "st_inlines.h"
 #include "main/enums.h"
 #include "main/teximage.h"
 #include "main/texstore.h"
@@ -194,9 +195,9 @@ st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
 
    DBG("%s \n", __FUNCTION__);
 
-   stImage->transfer = screen->get_tex_transfer(screen, pt, stImage->face,
-                                                stImage->level, zoffset, 
-                                                usage, x, y, w, h);
+   stImage->transfer = st_no_flush_get_tex_transfer(st, pt, stImage->face,
+						    stImage->level, zoffset,
+						    usage, x, y, w, h);
 
    if (stImage->transfer)
       return screen->transfer_map(screen, stImage->transfer);
@@ -253,13 +254,14 @@ st_surface_data(struct pipe_context *pipe,
 /* Upload data for a particular image.
  */
 void
-st_texture_image_data(struct pipe_context *pipe,
+st_texture_image_data(struct st_context *st,
                       struct pipe_texture *dst,
                       GLuint face,
                       GLuint level,
                       void *src,
                       GLuint src_row_stride, GLuint src_image_stride)
 {
+   struct pipe_context *pipe = st->pipe;
    struct pipe_screen *screen = pipe->screen;
    GLuint depth = dst->depth[level];
    GLuint i;
@@ -269,10 +271,10 @@ st_texture_image_data(struct pipe_context *pipe,
    DBG("%s\n", __FUNCTION__);
 
    for (i = 0; i < depth; i++) {
-      dst_transfer = screen->get_tex_transfer(screen, dst, face, level, i,
-                                              PIPE_TRANSFER_WRITE, 0, 0,
-                                              dst->width[level],
-                                              dst->height[level]);
+      dst_transfer = st_no_flush_get_tex_transfer(st, dst, face, level, i,
+						  PIPE_TRANSFER_WRITE, 0, 0,
+						  dst->width[level],
+						  dst->height[level]);
 
       st_surface_data(pipe, dst_transfer,
 		      0, 0,                             /* dstx, dsty */
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index a392e3d57cd..b9d447cb56e 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -156,7 +156,7 @@ st_texture_texel_offset(const struct pipe_texture * pt,
 /* Upload an image into a texture
  */
 extern void
-st_texture_image_data(struct pipe_context *pipe,
+st_texture_image_data(struct st_context *st,
                       struct pipe_texture *dst,
                       GLuint face, GLuint level, void *src,
                       GLuint src_row_pitch, GLuint src_image_pitch);