gallium: add interface and state tracker support for GL_AMD_pinned_memory

v2: add alignment restrictions to docs, fix indentation in headers

Reviewed-by: Christian König <christian.koenig@amd.com>

15 files changed, 39 insertions, 5 deletions

diff --git a/src/gallium/docs/source/screen.rst b/src/gallium/docs/source/screen.rst
index 5d80908057..373a2fe25d 100644
--- a/src/gallium/docs/source/screen.rst
+++ b/src/gallium/docs/source/screen.rst
@@ -246,6 +246,12 @@ The integer capabilities:
 * ``PIPE_CAP_MULTISAMPLE_Z_RESOLVE``: Whether the driver supports blitting
   a multisampled depth buffer into a single-sampled texture (or depth buffer).
   Only the first sampled should be copied.
+* ``PIPE_CAP_RESOURCE_FROM_USER_MEMORY``: Whether the driver can create
+  a pipe_resource where an already-existing piece of (malloc'd) user memory
+  is used as its backing storage. In other words, whether the driver can map
+  existing user memory into the device address space for direct device access.
+  The create function is pipe_screen::resource_from_user_memory. The address
+  and size must be page-aligned.
 
 
 .. _pipe_capf:
diff --git a/src/gallium/drivers/i915/i915_screen.c b/src/gallium/drivers/i915/i915_screen.c
index 2dcb507335..5fbbcf5158 100644
--- a/src/gallium/drivers/i915/i915_screen.c
+++ b/src/gallium/drivers/i915/i915_screen.c
@@ -229,6 +229,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
diff --git a/src/gallium/drivers/ilo/ilo_screen.c b/src/gallium/drivers/ilo/ilo_screen.c
index cf9f897500..95e34d3e4d 100644
--- a/src/gallium/drivers/ilo/ilo_screen.c
+++ b/src/gallium/drivers/ilo/ilo_screen.c
@@ -471,6 +471,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
    case PIPE_CAP_SAMPLER_VIEW_TARGET:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index 31c65df022..8b6e66e968 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -288,6 +288,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 1;
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
    }
    /* should only get here on unhandled cases */
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index 83cae7a173..a532e5303e 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -160,6 +160,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
index 222fa65b31..6c1de08ddc 100644
--- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
+++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
@@ -208,6 +208,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_DRAW_INDIRECT:
    case PIPE_CAP_VERTEXID_NOBASE:
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE: /* potentially supported on some hw */
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
index 63fbad7a09..edea845ecb 100644
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
@@ -192,6 +192,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
    case PIPE_CAP_VERTEXID_NOBASE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
 
    case PIPE_CAP_VENDOR_ID:
diff --git a/src/gallium/drivers/r300/r300_screen.c b/src/gallium/drivers/r300/r300_screen.c
index 7794fc26cd..36b2996546 100644
--- a/src/gallium/drivers/r300/r300_screen.c
+++ b/src/gallium/drivers/r300/r300_screen.c
@@ -184,6 +184,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_VERTEXID_NOBASE:
         case PIPE_CAP_POLYGON_OFFSET_CLAMP:
         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+        case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
             return 0;
 
         /* SWTCL-only features. */
diff --git a/src/gallium/drivers/softpipe/sp_screen.c b/src/gallium/drivers/softpipe/sp_screen.c
index 365fc0a1db..bae136768a 100644
--- a/src/gallium/drivers/softpipe/sp_screen.c
+++ b/src/gallium/drivers/softpipe/sp_screen.c
@@ -236,6 +236,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_POLYGON_OFFSET_CLAMP:
       return 0;
    case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
    }
    /* should only get here on unhandled cases */
diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index e3db4a8b44..e468a2f89c 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -307,6 +307,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
       /* XXX: Query the host ? */
       return 1;
    case PIPE_CAP_UMA:
+   case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
       return 0;
    }
 
diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
index db88eaa5bb..74643512b9 100644
--- a/src/gallium/drivers/vc4/vc4_screen.c
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -172,6 +172,7 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
         case PIPE_CAP_VERTEXID_NOBASE:
         case PIPE_CAP_POLYGON_OFFSET_CLAMP:
         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
+        case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
                 return 0;
 
                 /* Stream output. */
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 7ce25af20c..17850438dc 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -575,6 +575,7 @@ enum pipe_cap {
    PIPE_CAP_VERTEXID_NOBASE = 112,
    PIPE_CAP_POLYGON_OFFSET_CLAMP = 113,
    PIPE_CAP_MULTISAMPLE_Z_RESOLVE = 114,
+   PIPE_CAP_RESOURCE_FROM_USER_MEMORY = 115,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
diff --git a/src/gallium/include/pipe/p_screen.h b/src/gallium/include/pipe/p_screen.h
index cf958d26a0..ac885068aa 100644
--- a/src/gallium/include/pipe/p_screen.h
+++ b/src/gallium/include/pipe/p_screen.h
@@ -164,6 +164,14 @@ struct pipe_screen {
 						  struct winsys_handle *handle);
 
    /**
+    * Create a resource from user memory. This maps the user memory into
+    * the device address space.
+    */
+   struct pipe_resource * (*resource_from_user_memory)(struct pipe_screen *,
+                                                       const struct pipe_resource *t,
+                                                       void *user_memory);
+
+   /**
     * Get a winsys_handle from a texture. Some platforms/winsys requires
     * that the texture is created with a special usage flag like
     * DISPLAYTARGET or PRIMARY.
diff --git a/src/mesa/state_tracker/st_cb_bufferobjects.c b/src/mesa/state_tracker/st_cb_bufferobjects.c
index 90f786cc1f..f24805cf5d 100644
--- a/src/mesa/state_tracker/st_cb_bufferobjects.c
+++ b/src/mesa/state_tracker/st_cb_bufferobjects.c
@@ -186,7 +186,8 @@ st_bufferobj_data(struct gl_context *ctx,
    struct st_buffer_object *st_obj = st_buffer_object(obj);
    unsigned bind, pipe_usage, pipe_flags = 0;
 
-   if (size && data && st_obj->buffer &&
+   if (target != GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD &&
+       size && data && st_obj->buffer &&
        st_obj->Base.Size == size &&
        st_obj->Base.Usage == usage &&
        st_obj->Base.StorageFlags == storageFlags) {
@@ -287,6 +288,7 @@ st_bufferobj_data(struct gl_context *ctx,
    }
 
    if (size != 0) {
+      struct pipe_screen *screen = pipe->screen;
       struct pipe_resource buffer;
 
       memset(&buffer, 0, sizeof buffer);
@@ -300,16 +302,22 @@ st_bufferobj_data(struct gl_context *ctx,
       buffer.depth0 = 1;
       buffer.array_size = 1;
 
-      st_obj->buffer = pipe->screen->resource_create(pipe->screen, &buffer);
+      if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
+         st_obj->buffer =
+            screen->resource_from_user_memory(screen, &buffer, (void*)data);
+      }
+      else {
+         st_obj->buffer = screen->resource_create(screen, &buffer);
+
+         if (st_obj->buffer && data)
+            pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
+      }
 
       if (!st_obj->buffer) {
          /* out of memory */
          st_obj->Base.Size = 0;
          return GL_FALSE;
       }
-
-      if (data)
-         pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
    }
 
    /* BufferData may change an array or uniform buffer, need to update it */
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 2b5cde2804..036fac71a0 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -446,6 +446,7 @@ void st_init_extensions(struct pipe_screen *screen,
       { o(EXT_texture_swizzle),              PIPE_CAP_TEXTURE_SWIZZLE                  },
       { o(EXT_transform_feedback),           PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS        },
 
+      { o(AMD_pinned_memory),                PIPE_CAP_RESOURCE_FROM_USER_MEMORY        },
       { o(AMD_seamless_cubemap_per_texture), PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE    },
       { o(ATI_separate_stencil),             PIPE_CAP_TWO_SIDED_STENCIL                },
       { o(ATI_texture_mirror_once),          PIPE_CAP_TEXTURE_MIRROR_CLAMP             },