nvc0: implement resource_resolve

4 files changed, 532 insertions, 5 deletions

diff --git a/src/gallium/drivers/nvc0/nvc0_screen.c b/src/gallium/drivers/nvc0/nvc0_screen.c
index c785ceb649c..64e4ec7c1db 100644
--- a/src/gallium/drivers/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nvc0/nvc0_screen.c
@@ -223,6 +223,9 @@ nvc0_screen_destroy(struct pipe_screen *pscreen)
    }
    screen->base.channel->user_private = NULL;
 
+   if (screen->blitctx)
+      FREE(screen->blitctx);
+
    nouveau_bo_ref(NULL, &screen->text);
    nouveau_bo_ref(NULL, &screen->tls);
    nouveau_bo_ref(NULL, &screen->txc);
@@ -633,6 +636,9 @@ nvc0_screen_create(struct pipe_winsys *ws, struct nouveau_device *dev)
 
    screen->mm_VRAM_fe0 = nouveau_mm_create(dev, NOUVEAU_BO_VRAM, 0xfe0);
 
+   if (!nvc0_blitctx_create(screen))
+      goto fail;
+
    nouveau_fence_new(&screen->base, &screen->base.fence.current, FALSE);
 
    return pscreen;
diff --git a/src/gallium/drivers/nvc0/nvc0_screen.h b/src/gallium/drivers/nvc0/nvc0_screen.h
index 6780e32e302..cad91737f51 100644
--- a/src/gallium/drivers/nvc0/nvc0_screen.h
+++ b/src/gallium/drivers/nvc0/nvc0_screen.h
@@ -19,6 +19,8 @@ struct nvc0_context;
 
 #define NVC0_SCREEN_RESIDENT_BO_COUNT 5
 
+struct nvc0_blitctx;
+
 struct nvc0_screen {
    struct nouveau_screen base;
    struct nouveau_winsys *nvws;
@@ -36,6 +38,8 @@ struct nvc0_screen {
    struct nouveau_resource *text_heap;
    struct nouveau_resource *lib_code; /* allocated from text_heap */
 
+   struct nvc0_blitctx *blitctx;
+
    struct {
       struct nouveau_bo *bo[NVC0_SCRATCH_NR_BUFFERS];
       uint8_t *buf;
@@ -73,6 +77,8 @@ nvc0_screen(struct pipe_screen *screen)
    return (struct nvc0_screen *)screen;
 }
 
+boolean nvc0_blitctx_create(struct nvc0_screen *);
+
 void nvc0_screen_make_buffers_resident(struct nvc0_screen *);
 
 int nvc0_screen_tic_alloc(struct nvc0_screen *, void *);
diff --git a/src/gallium/drivers/nvc0/nvc0_shader_state.c b/src/gallium/drivers/nvc0/nvc0_shader_state.c
index 097e7c13226..6d014ee8699 100644
--- a/src/gallium/drivers/nvc0/nvc0_shader_state.c
+++ b/src/gallium/drivers/nvc0/nvc0_shader_state.c
@@ -62,12 +62,14 @@ nvc0_program_update_context_state(struct nvc0_context *nvc0,
 static INLINE boolean
 nvc0_program_validate(struct nvc0_context *nvc0, struct nvc0_program *prog)
 {
-   if (prog->translated)
+   if (prog->res)
       return TRUE;
 
-   prog->translated = nvc0_program_translate(prog);
-   if (!prog->translated)
-      return FALSE;
+   if (!prog->translated) {
+      prog->translated = nvc0_program_translate(prog);
+      if (!prog->translated)
+         return FALSE;
+   }
 
    return nvc0_program_upload_code(nvc0, prog);
 }
diff --git a/src/gallium/drivers/nvc0/nvc0_surface.c b/src/gallium/drivers/nvc0/nvc0_surface.c
index 385e2f0268b..61aa1a17f1d 100644
--- a/src/gallium/drivers/nvc0/nvc0_surface.c
+++ b/src/gallium/drivers/nvc0/nvc0_surface.c
@@ -421,14 +421,527 @@ nvc0_clear(struct pipe_context *pipe, unsigned buffers,
    }
 }
 
+
+struct nvc0_blitctx
+{
+   struct nvc0_screen *screen;
+   struct {
+      struct pipe_framebuffer_state fb;
+      struct nvc0_program *vp;
+      struct nvc0_program *tcp;
+      struct nvc0_program *tep;
+      struct nvc0_program *gp;
+      struct nvc0_program *fp;
+      unsigned num_textures[5];
+      unsigned num_samplers[5];
+      struct pipe_sampler_view *texture;
+      struct nv50_tsc_entry *sampler;
+      unsigned dirty;
+      unsigned clip_nr;
+   } saved;
+   struct nvc0_program vp;
+   struct nvc0_program fp;
+   struct nv50_tsc_entry sampler[2]; /* nearest, bilinear */
+   uint32_t fp_offset;
+   uint16_t color_mask;
+   uint8_t filter;
+};
+
+static void
+nvc0_blitctx_make_vp(struct nvc0_blitctx *blit)
+{
+   static const uint32_t code[] =
+   {
+      0xfff01c66, 0x06000080, /* vfetch b128 { $r0 $r1 $r2 $r3 } a[0x80] */
+      0xfff11c26, 0x06000090, /* vfetch b64 { $r4 $r5 } a[0x90]*/
+      0x03f01c66, 0x0a7e0070, /* export b128 o[0x70] { $r0 $r1 $r2 $r3 } */
+      0x13f01c26, 0x0a7e0080, /* export b64 o[0x80] { $r4 $r5 } */
+      0x00001de7, 0x80000000, /* exit */
+   };
+
+   blit->vp.type = PIPE_SHADER_VERTEX;
+   blit->vp.translated = TRUE;
+   blit->vp.code = (uint32_t *)code; /* no relocations -> no modification */
+   blit->vp.code_size = sizeof(code);
+   blit->vp.max_gpr = 6;
+   blit->vp.vp.edgeflag = PIPE_MAX_ATTRIBS;
+
+   blit->vp.hdr[0]  = 0x00020461; /* vertprog magic */
+   blit->vp.hdr[4]  = 0x000ff000; /* no outputs read */
+   blit->vp.hdr[6]  = 0x0000003f; /* a[0x80], a[0x90] */
+   blit->vp.hdr[13] = 0x0003f000; /* o[0x70], o[0x80] */
+}
+
+static void
+nvc0_blitctx_make_fp(struct nvc0_blitctx *blit)
+{
+   static const uint32_t code[] = /* use nvc0dis */
+   {
+      /* 2 coords RGBA in, RGBA out, also for Z32_FLOAT(_S8X24_USCALED)
+       * NOTE:
+       * NVC0 doesn't like tex 3d on non-3d textures, but there should
+       * only be 2d and 2d-array MS resources anyway.
+       */
+      0xfff01c00, 0xc07e0080,
+      0xfff05c00, 0xc07e0084,
+      0x00001c86, 0x8013c000,
+      0x00001de7, 0x80000000,
+      /* size: 0x70 + padding  */
+      0, 0, 0, 0,
+
+      /* 2 coords ZS in, S encoded in R, Z encoded in GBA (8_UNORM)
+       * Setup float outputs in a way that conversion to UNORM yields the
+       * desired byte value.
+       */
+      /* NOTE: need to repeat header */
+      0x00021462, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+      0x80000000, 0x0000000f, 0x00000000, 0x00000000, 0x00000000,
+      0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+      0x00000000, 0x00000000, 0x00000000, 0x0000000f, 0x00000000,
+      0xfff01c00, 0xc07e0080,
+      0xfff05c00, 0xc07e0084,
+      0x00001c86, 0x8010c000,
+      0xfc009c02, 0x312dffff,
+      0x05001c88,
+      0x09009e88,
+      0x04001c02, 0x30ee0202,
+      0xfc205c02, 0x38000003,
+      0x0020dc02, 0x3803fc00,
+      0x00209c02, 0x380003fc,
+      0x05005c88,
+      0x0d00dc88,
+      0x09209e04, 0x18000000,
+      0x04105c02, 0x30ee0202,
+      0x0430dc02, 0x30ce0202,
+      0x04209c02, 0x30de0202,
+      0x00001de7, 0x80000000,
+      /* size: 0xc8 + padding */
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+
+      /* 2 coords ZS in, Z encoded in RGB, S encoded in A (U8_UNORM) */
+      0x00021462, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+      0x80000000, 0x0000000f, 0x00000000, 0x00000000, 0x00000000,
+      0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+      0x00000000, 0x00000000, 0x00000000, 0x0000000f, 0x00000000,
+      0xfff01c00, 0xc07e0080,
+      0xfff05c00, 0xc07e0084,
+      0x00001c86, 0x8010c000,
+      0xfc009c02, 0x312dffff,
+      0x05081c88,
+      0x09009e88,
+      0x0430dc02, 0x30ee0202,
+      0xfc201c02, 0x38000003,
+      0x00205c02, 0x380003fc,
+      0x00209c02, 0x3803fc00,
+      0x01001c88,
+      0x05005c88,
+      0x09209e04, 0x18000000,
+      0x04001c02, 0x30ee0202,
+      0x04105c02, 0x30de0202,
+      0x04209c02, 0x30ce0202,
+      0x00001de7, 0x80000000,
+   };
+
+   blit->fp.type = PIPE_SHADER_FRAGMENT;
+   blit->fp.translated = TRUE;
+   blit->fp.code = (uint32_t *)code; /* const_cast */
+   blit->fp.code_size = sizeof(code);
+   blit->fp.max_gpr = 4;
+
+   blit->fp.hdr[0]  = 0x00021462; /* fragprog magic */
+   blit->fp.hdr[5]  = 0x80000000;
+   blit->fp.hdr[6]  = 0x0000000f; /* 2 linear */
+   blit->fp.hdr[18] = 0x0000000f; /* 1 colour output */
+}
+
+static void
+nvc0_blitctx_make_sampler(struct nvc0_blitctx *blit)
+{
+   /* clamp to edge, min/max lod = 0, nearest filtering */
+
+   blit->sampler[0].id = -1;
+
+   blit->sampler[0].tsc[0] = 0x00000092;
+   blit->sampler[0].tsc[1] = 0x00000051;
+
+   /* clamp to edge, min/max lod = 0, bilinear filtering */
+
+   blit->sampler[1].id = -1;
+
+   blit->sampler[1].tsc[0] = 0x00000092;
+   blit->sampler[1].tsc[1] = 0x00000062;
+}
+
+/* Since shaders cannot export stencil, we cannot copy stencil values when
+ * rendering to ZETA, so we attach the ZS surface to a colour render target.
+ */
+static INLINE enum pipe_format
+nvc0_blit_zeta_to_colour_format(enum pipe_format format)
+{
+   switch (format) {
+   case PIPE_FORMAT_Z16_UNORM:               return PIPE_FORMAT_R16_UNORM;
+   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+   case PIPE_FORMAT_Z24X8_UNORM:             return PIPE_FORMAT_R8G8B8A8_UNORM;
+   case PIPE_FORMAT_Z32_FLOAT:               return PIPE_FORMAT_R32_FLOAT;
+   case PIPE_FORMAT_Z32_FLOAT_S8X24_USCALED: return PIPE_FORMAT_R32G32_FLOAT;
+   default:
+      assert(0);
+      return PIPE_FORMAT_NONE;
+   }
+}
+
+static void
+nvc0_blitctx_get_color_mask_and_fp(struct nvc0_blitctx *blit,
+                                   enum pipe_format format, uint8_t mask)
+{
+   blit->color_mask = 0;
+
+   switch (format) {
+   case PIPE_FORMAT_Z24X8_UNORM:
+   case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
+      blit->fp_offset = 0x180;
+      if (mask & PIPE_MASK_Z)
+         blit->color_mask |= 0x0111;
+      if (mask & PIPE_MASK_S)
+         blit->color_mask |= 0x1000;
+      break;
+   case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
+      blit->fp_offset = 0x80;
+      if (mask & PIPE_MASK_Z)
+         blit->color_mask |= 0x1110;
+      if (mask & PIPE_MASK_S)
+         blit->color_mask |= 0x0001;
+      break;
+   default:
+      blit->fp_offset = 0;
+      if (mask & (PIPE_MASK_R | PIPE_MASK_Z)) blit->color_mask |= 0x0001;
+      if (mask & (PIPE_MASK_G | PIPE_MASK_S)) blit->color_mask |= 0x0010;
+      if (mask & PIPE_MASK_B) blit->color_mask |= 0x0100;
+      if (mask & PIPE_MASK_A) blit->color_mask |= 0x1000;
+      break;
+   }
+}
+
+static void
+nvc0_blit_set_dst(struct nvc0_context *nvc0,
+                  struct pipe_resource *res, unsigned level, unsigned layer)
+{
+   struct pipe_context *pipe = &nvc0->base.pipe;
+   struct pipe_surface templ;
+
+   if (util_format_is_depth_or_stencil(res->format))
+      templ.format = nvc0_blit_zeta_to_colour_format(res->format);
+   else
+      templ.format = res->format;
+
+   templ.usage = PIPE_USAGE_STREAM;
+   templ.u.tex.level = level;
+   templ.u.tex.first_layer = templ.u.tex.last_layer = layer;
+
+   nvc0->framebuffer.cbufs[0] = nvc0_miptree_surface_new(pipe, res, &templ);
+   nvc0->framebuffer.nr_cbufs = 1;
+   nvc0->framebuffer.zsbuf = NULL;
+   nvc0->framebuffer.width = nvc0->framebuffer.cbufs[0]->width;
+   nvc0->framebuffer.height = nvc0->framebuffer.cbufs[0]->height;
+}
+
+static INLINE void
+nvc0_blit_fixup_tic_entry(struct pipe_sampler_view *view)
+{
+   struct nv50_tic_entry *ent = nv50_tic_entry(view);
+
+   ent->tic[2] &= ~(1 << 31); /* scaled coordinates, ok with 3d textures ? */
+
+   /* magic: */
+
+   ent->tic[3] = 0x20000000; /* affects quality of near vertical edges in MS8 */
+}
+
+static void
+nvc0_blit_set_src(struct nvc0_context *nvc0,
+                  struct pipe_resource *res, unsigned level, unsigned layer)
+{
+   struct pipe_context *pipe = &nvc0->base.pipe;
+   struct pipe_sampler_view templ;
+   int s;
+
+   templ.format = res->format;
+   templ.u.tex.first_layer = templ.u.tex.last_layer = layer;
+   templ.u.tex.first_level = templ.u.tex.last_level = level;
+   templ.swizzle_r = PIPE_SWIZZLE_RED;
+   templ.swizzle_g = PIPE_SWIZZLE_GREEN;
+   templ.swizzle_b = PIPE_SWIZZLE_BLUE;
+   templ.swizzle_a = PIPE_SWIZZLE_ALPHA;
+
+   nvc0->textures[4][0] = nvc0_create_sampler_view(pipe, res, &templ);
+
+   nvc0_blit_fixup_tic_entry(nvc0->textures[4][0]);
+
+   for (s = 0; s <= 3; ++s)
+      nvc0->num_textures[s] = 0;
+   nvc0->num_textures[4] = 1;
+}
+
+static void
+nvc0_blitctx_prepare_state(struct nvc0_blitctx *blit)
+{
+   struct nouveau_channel *chan = blit->screen->base.channel;
+
+   /* TODO: maybe make this a MACRO (if we need more logic) ? */
+
+   /* blend state */
+   BEGIN_RING(chan, RING_3D(COLOR_MASK(0)), 1);
+   OUT_RING  (chan, blit->color_mask);
+   BEGIN_RING(chan, RING_3D(BLEND_ENABLE(0)), 1);
+   OUT_RING  (chan, 0);
+   IMMED_RING(chan, RING_3D(LOGIC_OP_ENABLE), 0);
+
+   /* rasterizer state */
+   BEGIN_RING(chan, RING_3D(FRAG_COLOR_CLAMP_EN), 1);
+   OUT_RING  (chan, 0);
+   IMMED_RING(chan, RING_3D(MULTISAMPLE_ENABLE), 0);
+   BEGIN_RING(chan, RING_3D(MSAA_MASK(0)), 4);
+   OUT_RING  (chan, 0xffff);
+   OUT_RING  (chan, 0xffff);
+   OUT_RING  (chan, 0xffff);
+   OUT_RING  (chan, 0xffff);
+   BEGIN_RING(chan, RING_3D(POLYGON_MODE_FRONT), 1);
+   OUT_RING  (chan, NVC0_3D_POLYGON_MODE_FRONT_FILL);
+   BEGIN_RING(chan, RING_3D(POLYGON_MODE_BACK), 1);
+   OUT_RING  (chan, NVC0_3D_POLYGON_MODE_BACK_FILL);
+   IMMED_RING(chan, RING_3D(POLYGON_SMOOTH_ENABLE), 0);
+   IMMED_RING(chan, RING_3D(POLYGON_OFFSET_FILL_ENABLE), 0);
+   IMMED_RING(chan, RING_3D(POLYGON_STIPPLE_ENABLE), 0);
+   IMMED_RING(chan, RING_3D(CULL_FACE_ENABLE), 0);
+
+   /* zsa state */
+   IMMED_RING(chan, RING_3D(DEPTH_TEST_ENABLE), 0);
+   IMMED_RING(chan, RING_3D(STENCIL_ENABLE), 0);
+   IMMED_RING(chan, RING_3D(ALPHA_TEST_ENABLE), 0);
+
+   /* transform feedback ? */
+}
+
+static void
+nvc0_blitctx_pre_blit(struct nvc0_blitctx *blit, struct nvc0_context *nvc0)
+{
+   int s;
+
+   blit->saved.fb.width = nvc0->framebuffer.width;
+   blit->saved.fb.height = nvc0->framebuffer.height;
+   blit->saved.fb.nr_cbufs = nvc0->framebuffer.nr_cbufs;
+   blit->saved.fb.cbufs[0] = nvc0->framebuffer.cbufs[0];
+   blit->saved.fb.zsbuf = nvc0->framebuffer.zsbuf;
+
+   blit->saved.vp = nvc0->vertprog;
+   blit->saved.tcp = nvc0->tctlprog;
+   blit->saved.tep = nvc0->tevlprog;
+   blit->saved.gp = nvc0->gmtyprog;
+   blit->saved.fp = nvc0->fragprog;
+
+   nvc0->vertprog = &blit->vp;
+   nvc0->fragprog = &blit->fp;
+   nvc0->tctlprog = NULL;
+   nvc0->tevlprog = NULL;
+   nvc0->gmtyprog = NULL;
+
+   blit->saved.clip_nr = nvc0->clip.nr;
+
+   nvc0->clip.nr = 0;
+
+   for (s = 0; s <= 4; ++s) {
+      blit->saved.num_textures[s] = nvc0->num_textures[s];
+      blit->saved.num_samplers[s] = nvc0->num_samplers[s];
+   }
+   blit->saved.texture = nvc0->textures[4][0];
+   blit->saved.sampler = nvc0->samplers[4][0];
+
+   nvc0->samplers[4][0] = &blit->sampler[blit->filter];
+
+   for (s = 0; s <= 3; ++s)
+      nvc0->num_samplers[s] = 0;
+   nvc0->num_samplers[4] = 1;
+
+   blit->saved.dirty = nvc0->dirty;
+
+   nvc0->dirty = NVC0_NEW_FRAMEBUFFER |
+      NVC0_NEW_VERTPROG | NVC0_NEW_FRAGPROG |
+      NVC0_NEW_TCTLPROG | NVC0_NEW_TEVLPROG | NVC0_NEW_GMTYPROG |
+      NVC0_NEW_TEXTURES | NVC0_NEW_SAMPLERS;
+}
+
+static void
+nvc0_blitctx_post_blit(struct nvc0_context *nvc0, struct nvc0_blitctx *blit)
+{
+   int s;
+
+   pipe_surface_reference(&nvc0->framebuffer.cbufs[0], NULL);
+
+   nvc0->framebuffer.width = blit->saved.fb.width;
+   nvc0->framebuffer.height = blit->saved.fb.height;
+   nvc0->framebuffer.nr_cbufs = blit->saved.fb.nr_cbufs;
+   nvc0->framebuffer.cbufs[0] = blit->saved.fb.cbufs[0];
+   nvc0->framebuffer.zsbuf = blit->saved.fb.zsbuf;
+
+   nvc0->vertprog = blit->saved.vp;
+   nvc0->tctlprog = blit->saved.tcp;
+   nvc0->tevlprog = blit->saved.tep;
+   nvc0->gmtyprog = blit->saved.gp;
+   nvc0->fragprog = blit->saved.fp;
+
+   nvc0->clip.nr = blit->saved.clip_nr;
+
+   pipe_sampler_view_reference(&nvc0->textures[4][0], NULL);
+
+   for (s = 0; s <= 4; ++s) {
+      nvc0->num_textures[s] = blit->saved.num_textures[s];
+      nvc0->num_samplers[s] = blit->saved.num_samplers[s];
+   }
+   nvc0->textures[4][0] = blit->saved.texture;
+   nvc0->samplers[4][0] = blit->saved.sampler;
+
+   nvc0->dirty = blit->saved.dirty |
+      (NVC0_NEW_FRAMEBUFFER | NVC0_NEW_SCISSOR | NVC0_NEW_SAMPLE_MASK |
+       NVC0_NEW_RASTERIZER | NVC0_NEW_ZSA | NVC0_NEW_BLEND |
+       NVC0_NEW_TEXTURES | NVC0_NEW_SAMPLERS |
+       NVC0_NEW_VERTPROG | NVC0_NEW_FRAGPROG |
+       NVC0_NEW_TCTLPROG | NVC0_NEW_TEVLPROG | NVC0_NEW_GMTYPROG);
+}
+
+static void
+nvc0_resource_resolve(struct pipe_context *pipe,
+                      const struct pipe_resolve_info *info)
+{
+   struct nvc0_context *nvc0 = nvc0_context(pipe);
+   struct nvc0_screen *screen = nvc0->screen;
+   struct nvc0_blitctx *blit = screen->blitctx;
+   struct nouveau_channel *chan = screen->base.channel;
+   struct pipe_resource *src = info->src.res;
+   struct pipe_resource *dst = info->dst.res;
+   float x0, x1, y0, y1;
+   float x_range, y_range;
+
+   /* Would need more shader variants or, better, just change the TIC target.
+    * But no API creates 3D MS textures ...
+    */
+   if (src->target == PIPE_TEXTURE_3D)
+      return;
+
+   nvc0_blitctx_get_color_mask_and_fp(blit, dst->format, info->mask);
+
+   blit->filter = util_format_is_depth_or_stencil(dst->format) ? 0 : 1;
+
+   nvc0_blitctx_pre_blit(blit, nvc0);
+
+   nvc0_blit_set_dst(nvc0, dst, info->dst.level, info->dst.layer);
+   nvc0_blit_set_src(nvc0, src, 0,               info->src.layer);
+
+   nvc0_blitctx_prepare_state(blit);
+
+   nvc0_state_validate(nvc0, ~0, 36);
+
+   x_range =
+      (float)(info->src.x1 - info->src.x0) /
+      (float)(info->dst.x1 - info->dst.x0);
+   y_range =
+      (float)(info->src.y1 - info->src.y0) /
+      (float)(info->dst.y1 - info->dst.y0);
+
+   x0 = (float)info->src.x0 - x_range * (float)info->dst.x0;
+   y0 = (float)info->src.y0 - y_range * (float)info->dst.y0;
+
+   x1 = x0 + 16384.0f * x_range;
+   y1 = y0 + 16384.0f * y_range;
+
+   x0 *= (float)(1 << nv50_miptree(src)->ms_x);
+   x1 *= (float)(1 << nv50_miptree(src)->ms_x);
+   y0 *= (float)(1 << nv50_miptree(src)->ms_y);
+   y1 *= (float)(1 << nv50_miptree(src)->ms_y);
+
+   BEGIN_RING(chan, RING_3D(SP_START_ID(5)), 1);
+   OUT_RING  (chan,
+              blit->fp.code_base + blit->fp_offset);
+
+   IMMED_RING(chan, RING_3D(VIEWPORT_TRANSFORM_EN), 0);
+
+   /* Draw a large triangle in screen coordinates covering the whole
+    * render target, with scissors defining the destination region.
+    * The vertex is supplied with non-normalized texture coordinates
+    * arranged in a way to yield the desired offset and scale.
+    */
+
+   BEGIN_RING(chan, RING_3D(SCISSOR_HORIZ(0)), 2);
+   OUT_RING  (chan, (info->dst.x1 << 16) | info->dst.x0);
+   OUT_RING  (chan, (info->dst.y1 << 16) | info->dst.y0);
+
+   IMMED_RING(chan, RING_3D(VERTEX_BEGIN_GL),
+              NVC0_3D_VERTEX_BEGIN_GL_PRIMITIVE_TRIANGLES);
+
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74201);
+   OUT_RINGf (chan, x0);
+   OUT_RINGf (chan, y0);
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74200);
+   OUT_RINGf (chan, 0.0f);
+   OUT_RINGf (chan, 0.0f);
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74201);
+   OUT_RINGf (chan, x1);
+   OUT_RINGf (chan, y0);
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74200);
+   OUT_RINGf (chan, 16384 << nv50_miptree(dst)->ms_x);
+   OUT_RINGf (chan, 0.0f);
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74201);
+   OUT_RINGf (chan, x0);
+   OUT_RINGf (chan, y1);
+   BEGIN_RING(chan, RING_3D(VTX_ATTR_DEFINE), 3);
+   OUT_RING  (chan, 0x74200);
+   OUT_RINGf (chan, 0.0f);
+   OUT_RINGf (chan, 16384 << nv50_miptree(dst)->ms_y);
+
+   IMMED_RING(chan, RING_3D(VERTEX_END_GL), 0);
+
+   /* re-enable normally constant state */
+
+   IMMED_RING(chan, RING_3D(VIEWPORT_TRANSFORM_EN), 1);
+
+   nvc0_blitctx_post_blit(nvc0, blit);
+}
+
+boolean
+nvc0_blitctx_create(struct nvc0_screen *screen)
+{
+   screen->blitctx = CALLOC_STRUCT(nvc0_blitctx);
+   if (!screen->blitctx) {
+      NOUVEAU_ERR("failed to allocate blit context\n");
+      return FALSE;
+   }
+
+   screen->blitctx->screen = screen;
+
+   nvc0_blitctx_make_vp(screen->blitctx);
+   nvc0_blitctx_make_fp(screen->blitctx);
+
+   nvc0_blitctx_make_sampler(screen->blitctx);
+
+   screen->blitctx->color_mask = 0x1111;
+
+   return TRUE;
+}
+
+
 void
 nvc0_init_surface_functions(struct nvc0_context *nvc0)
 {
    struct pipe_context *pipe = &nvc0->base.pipe;
 
    pipe->resource_copy_region = nvc0_resource_copy_region;
+   pipe->resource_resolve = nvc0_resource_resolve;
    pipe->clear_render_target = nvc0_clear_render_target;
    pipe->clear_depth_stencil = nvc0_clear_depth_stencil;
 }
 
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