vc4: Initial skeleton driver import.

This mostly just takes every draw call and turns it into a sequence of
commands that clear the FBO and draw a single shaded triangle to it,
regardless of the actual input vertices or shaders.  I copied the initial
driver skeleton mostly from freedreno, and I've preserved Rob Clark's
copyright for those.  I also based my initial hardcoded shaders and
command lists on Scott Mansell (phire)'s "hackdriver" project, though the
bit patterns of the shaders emitted end up being different.

v2: Rebase on gallium megadrivers changes.
v3: Rebase on PIPE_SHADER_CAP_MAX_CONSTS change.
v4: Rely on simpenrose actually being installed when building for
    simulation.
v5: Add more header duplicate-include guards.
v6: Apply Emil's review (protection against vc4 sim and ilo at the same
    time, and dropping the dricommon drm bits) and fix a copyright header
    (thanks, Roland)

1 files changed, 439 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
new file mode 100644
index 00000000000..7c7ed4ca6eb
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -0,0 +1,439 @@
+/*
+ * Copyright © 2014 Broadcom
+ * Copyright (C) 2012 Rob Clark <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+
+#include "pipe/p_defines.h"
+#include "pipe/p_screen.h"
+#include "pipe/p_state.h"
+
+#include "util/u_debug.h"
+#include "util/u_memory.h"
+#include "util/u_format.h"
+
+#include "vc4_screen.h"
+#include "vc4_context.h"
+#include "vc4_resource.h"
+
+static const struct debug_named_value debug_options[] = {
+        {"cl",      VC4_DBG_CL,   "Dump command list during creation"},
+};
+
+static const char *
+vc4_screen_get_name(struct pipe_screen *pscreen)
+{
+        return "VC4";
+}
+
+static const char *
+vc4_screen_get_vendor(struct pipe_screen *pscreen)
+{
+        return "Broadcom";
+}
+
+static void
+vc4_screen_destroy(struct pipe_screen *pscreen)
+{
+        free(pscreen);
+}
+
+static int
+vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
+{
+        switch (param) {
+                /* Supported features (boolean caps). */
+        case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
+        case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
+        case PIPE_CAP_NPOT_TEXTURES:
+        case PIPE_CAP_USER_CONSTANT_BUFFERS:
+        case PIPE_CAP_TEXTURE_SHADOW_MAP:
+        case PIPE_CAP_BLEND_EQUATION_SEPARATE:
+        case PIPE_CAP_TWO_SIDED_STENCIL:
+                return 1;
+
+                /* lying for GL 2.0 */
+        case PIPE_CAP_OCCLUSION_QUERY:
+        case PIPE_CAP_POINT_SPRITE:
+                return 1;
+
+        case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
+                return 256;
+
+        case PIPE_CAP_GLSL_FEATURE_LEVEL:
+                return 120;
+
+        case PIPE_CAP_MAX_VIEWPORTS:
+                return 1;
+
+                /* Unsupported features. */
+        case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
+        case PIPE_CAP_ANISOTROPIC_FILTER:
+        case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
+        case PIPE_CAP_CUBE_MAP_ARRAY:
+        case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
+        case PIPE_CAP_TEXTURE_SWIZZLE:
+        case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
+        case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
+        case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
+        case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
+        case PIPE_CAP_SEAMLESS_CUBE_MAP:
+        case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
+        case PIPE_CAP_TGSI_INSTANCEID:
+        case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
+        case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
+        case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
+        case PIPE_CAP_COMPUTE:
+        case PIPE_CAP_START_INSTANCE:
+        case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
+        case PIPE_CAP_SHADER_STENCIL_EXPORT:
+        case PIPE_CAP_TGSI_TEXCOORD:
+        case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
+        case PIPE_CAP_CONDITIONAL_RENDER:
+        case PIPE_CAP_PRIMITIVE_RESTART:
+        case PIPE_CAP_TEXTURE_MULTISAMPLE:
+        case PIPE_CAP_TEXTURE_BARRIER:
+        case PIPE_CAP_SM3:
+        case PIPE_CAP_INDEP_BLEND_ENABLE:
+        case PIPE_CAP_INDEP_BLEND_FUNC:
+        case PIPE_CAP_DEPTH_CLIP_DISABLE:
+        case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
+        case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
+        case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
+        case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
+        case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
+        case PIPE_CAP_VERTEX_COLOR_CLAMPED:
+        case PIPE_CAP_USER_VERTEX_BUFFERS:
+        case PIPE_CAP_USER_INDEX_BUFFERS:
+        case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
+        case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
+        case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
+        case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
+        case PIPE_CAP_TEXTURE_GATHER_SM5:
+        case PIPE_CAP_FAKE_SW_MSAA:
+        case PIPE_CAP_TEXTURE_QUERY_LOD:
+        case PIPE_CAP_SAMPLE_SHADING:
+        case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
+        case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
+        case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
+        case PIPE_CAP_MAX_TEXEL_OFFSET:
+        case PIPE_CAP_MAX_VERTEX_STREAMS:
+        case PIPE_CAP_DRAW_INDIRECT:
+                return 0;
+
+                /* Stream output. */
+        case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
+        case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
+        case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
+        case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
+                return 0;
+
+                /* Geometry shader output, unsupported. */
+        case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
+        case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
+                return 0;
+
+                /* Texturing. */
+        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
+        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
+                return VC4_MAX_MIP_LEVELS;
+        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
+                return 1;
+        case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
+                return 0;
+
+                /* Render targets. */
+        case PIPE_CAP_MAX_RENDER_TARGETS:
+                return 1;
+
+                /* Queries. */
+        case PIPE_CAP_QUERY_TIME_ELAPSED:
+        case PIPE_CAP_QUERY_TIMESTAMP:
+                return 0;
+
+        case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
+        case PIPE_CAP_MIN_TEXEL_OFFSET:
+                return 0;
+
+        case PIPE_CAP_ENDIANNESS:
+                return PIPE_ENDIAN_LITTLE;
+
+        case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
+                return 64;
+
+        default:
+                fprintf(stderr, "unknown param %d\n", param);
+                return 0;
+        }
+}
+
+static float
+vc4_screen_get_paramf(struct pipe_screen *pscreen, enum pipe_capf param)
+{
+        switch (param) {
+        case PIPE_CAPF_MAX_LINE_WIDTH:
+        case PIPE_CAPF_MAX_LINE_WIDTH_AA:
+        case PIPE_CAPF_MAX_POINT_WIDTH:
+        case PIPE_CAPF_MAX_POINT_WIDTH_AA:
+                return 8192.0f;
+        case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
+                return 0.0f;
+        case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
+                return 0.0f;
+        case PIPE_CAPF_GUARD_BAND_LEFT:
+        case PIPE_CAPF_GUARD_BAND_TOP:
+        case PIPE_CAPF_GUARD_BAND_RIGHT:
+        case PIPE_CAPF_GUARD_BAND_BOTTOM:
+                return 0.0f;
+        default:
+                fprintf(stderr, "unknown paramf %d\n", param);
+                return 0;
+        }
+}
+
+static int
+vc4_screen_get_shader_param(struct pipe_screen *pscreen, unsigned shader,
+                           enum pipe_shader_cap param)
+{
+        if (shader != PIPE_SHADER_VERTEX &&
+            shader != PIPE_SHADER_FRAGMENT) {
+                return 0;
+        }
+
+        /* this is probably not totally correct.. but it's a start: */
+        switch (param) {
+        case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
+        case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
+        case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
+        case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
+                return 16384;
+        case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
+                return 0;
+        case PIPE_SHADER_CAP_MAX_INPUTS:
+                return 16;
+        case PIPE_SHADER_CAP_MAX_TEMPS:
+                return 64; /* Max native temporaries. */
+        case PIPE_SHADER_CAP_MAX_ADDRS:
+                return 1; /* Max native address registers */
+        case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
+                return 64 * sizeof(float[4]);
+        case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
+                return 1;
+        case PIPE_SHADER_CAP_MAX_PREDS:
+                return 0; /* nothing uses this */
+        case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
+                return 0;
+        case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
+        case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
+        case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
+        case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
+                return 0;
+        case PIPE_SHADER_CAP_SUBROUTINES:
+                return 0;
+        case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
+                return 0;
+        case PIPE_SHADER_CAP_INTEGERS:
+        case PIPE_SHADER_CAP_DOUBLES:
+                return 0;
+        case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
+        case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
+                return 16;
+        case PIPE_SHADER_CAP_PREFERRED_IR:
+                return PIPE_SHADER_IR_TGSI;
+        default:
+                fprintf(stderr, "unknown shader param %d\n", param);
+                return 0;
+        }
+        return 0;
+}
+
+uint8_t
+vc4_get_texture_format(enum pipe_format format)
+{
+        switch (format) {
+        case PIPE_FORMAT_B8G8R8A8_UNORM:
+                return 0;
+        case PIPE_FORMAT_B8G8R8X8_UNORM:
+                return 1;
+        case PIPE_FORMAT_R8G8B8A8_UNORM:
+                return 0;
+        case PIPE_FORMAT_R8G8B8X8_UNORM:
+                return 1;
+        case PIPE_FORMAT_A8R8G8B8_UNORM:
+                return 0;
+        case PIPE_FORMAT_X8R8G8B8_UNORM:
+                return 1;
+        case PIPE_FORMAT_A8B8G8R8_UNORM:
+                return 0;
+        case PIPE_FORMAT_X8B8G8R8_UNORM:
+                return 1;
+/*
+        case PIPE_FORMAT_R4G4B4A4_UNORM:
+                return 2;
+        case PIPE_FORMAT_R5G5B5A1_UNORM:
+                return 3;
+        case PIPE_FORMAT_R5G6B5_UNORM:
+                return 4;
+*/
+        case PIPE_FORMAT_L8_UNORM:
+                return 5;
+        case PIPE_FORMAT_A8_UNORM:
+                return 6;
+        case PIPE_FORMAT_L8A8_UNORM:
+                return 7;
+                /* XXX: ETC1 and more*/
+        default:
+                return ~0;
+        }
+}
+
+static boolean
+vc4_screen_is_format_supported(struct pipe_screen *pscreen,
+                               enum pipe_format format,
+                               enum pipe_texture_target target,
+                               unsigned sample_count,
+                               unsigned usage)
+{
+        unsigned retval = 0;
+
+        if ((target >= PIPE_MAX_TEXTURE_TYPES) ||
+            (sample_count > 1) ||
+            !util_format_is_supported(format, usage)) {
+                return FALSE;
+        }
+
+        if (usage & PIPE_BIND_VERTEX_BUFFER)
+                retval |= PIPE_BIND_VERTEX_BUFFER; /* XXX */
+
+        if ((usage & PIPE_BIND_RENDER_TARGET) &&
+            (format == PIPE_FORMAT_B8G8R8A8_UNORM ||
+             format == PIPE_FORMAT_B8G8R8X8_UNORM || /* XXX: really? */
+             format == PIPE_FORMAT_R8G8B8A8_UNORM ||
+             format == PIPE_FORMAT_R8G8B8X8_UNORM || /* XXX: really? */
+             format == PIPE_FORMAT_A8B8G8R8_UNORM ||
+             format == PIPE_FORMAT_X8B8G8R8_UNORM || /* XXX: really? */
+             format == PIPE_FORMAT_A8R8G8B8_UNORM ||
+             format == PIPE_FORMAT_X8R8G8B8_UNORM || /* XXX: really? */
+             format == PIPE_FORMAT_R16G16B16A16_FLOAT)) {
+                retval |= PIPE_BIND_RENDER_TARGET;
+        }
+
+        if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
+            (vc4_get_texture_format(format) != ~0)) {
+                retval |= usage & (PIPE_BIND_SAMPLER_VIEW |
+                                   PIPE_BIND_VERTEX_BUFFER);
+        }
+
+        if ((usage & PIPE_BIND_DEPTH_STENCIL) &&
+            (format == PIPE_FORMAT_Z24_UNORM_S8_UINT ||
+             format == PIPE_FORMAT_Z24X8_UNORM)) {
+                retval |= PIPE_BIND_DEPTH_STENCIL;
+        }
+
+        if ((usage & PIPE_BIND_INDEX_BUFFER) &&
+            (format == PIPE_FORMAT_I8_UINT ||
+             format == PIPE_FORMAT_I16_UINT)) {
+                retval |= PIPE_BIND_INDEX_BUFFER;
+        }
+
+        if (usage & PIPE_BIND_TRANSFER_READ)
+                retval |= PIPE_BIND_TRANSFER_READ;
+        if (usage & PIPE_BIND_TRANSFER_WRITE)
+                retval |= PIPE_BIND_TRANSFER_WRITE;
+
+        return retval == usage;
+}
+
+struct pipe_screen *
+vc4_screen_create(int fd)
+{
+        struct vc4_screen *screen = CALLOC_STRUCT(vc4_screen);
+        struct pipe_screen *pscreen;
+
+        pscreen = &screen->base;
+
+        pscreen->destroy = vc4_screen_destroy;
+        pscreen->get_param = vc4_screen_get_param;
+        pscreen->get_paramf = vc4_screen_get_paramf;
+        pscreen->get_shader_param = vc4_screen_get_shader_param;
+        pscreen->context_create = vc4_context_create;
+        pscreen->is_format_supported = vc4_screen_is_format_supported;
+
+        screen->fd = fd;
+
+#if USE_VC4_SIMULATOR
+        vc4_simulator_init(screen);
+#endif
+
+        vc4_resource_screen_init(pscreen);
+
+        pscreen->get_name = vc4_screen_get_name;
+        pscreen->get_vendor = vc4_screen_get_vendor;
+
+        return pscreen;
+}
+
+boolean
+vc4_screen_bo_get_handle(struct pipe_screen *pscreen,
+                         struct vc4_bo *bo,
+                         unsigned stride,
+                         struct winsys_handle *whandle)
+{
+        whandle->stride = stride;
+
+        switch (whandle->type) {
+        case DRM_API_HANDLE_TYPE_SHARED:
+                return vc4_bo_flink(bo, &whandle->handle);
+        case DRM_API_HANDLE_TYPE_KMS:
+                whandle->handle = bo->handle;
+                return TRUE;
+        }
+
+        return FALSE;
+}
+
+struct vc4_bo *
+vc4_screen_bo_from_handle(struct pipe_screen *pscreen,
+                          struct winsys_handle *whandle,
+                          unsigned *out_stride)
+{
+        struct vc4_screen *screen = vc4_screen(pscreen);
+        struct vc4_bo *bo;
+
+        if (whandle->type != DRM_API_HANDLE_TYPE_SHARED) {
+                fprintf(stderr,
+                        "Attempt to import unsupported handle type %d\n",
+                        whandle->type);
+                return NULL;
+        }
+
+        bo = vc4_bo_open_name(screen, whandle->handle, whandle->stride);
+        if (!bo) {
+                fprintf(stderr, "Open name %d failed\n", whandle->handle);
+                return NULL;
+        }
+
+        *out_stride = whandle->stride;
+
+        return bo;
+}