freedreno: add renderonly scanout

[mesa.git] / src / gallium / drivers / freedreno / freedreno_screen.c

/*
 * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
 *
 * 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.
 *
 * Authors:
 *    Rob Clark <robclark@freedesktop.org>
 */


#include "pipe/p_defines.h"
#include "pipe/p_screen.h"
#include "pipe/p_state.h"

#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "util/u_format.h"
#include "util/u_format_s3tc.h"
#include "util/u_screen.h"
#include "util/u_string.h"
#include "util/u_debug.h"

#include "util/os_time.h"

#include <drm_fourcc.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/sysinfo.h>

#include "freedreno_screen.h"
#include "freedreno_resource.h"
#include "freedreno_fence.h"
#include "freedreno_query.h"
#include "freedreno_util.h"

#include "a2xx/fd2_screen.h"
#include "a3xx/fd3_screen.h"
#include "a4xx/fd4_screen.h"
#include "a5xx/fd5_screen.h"
#include "a6xx/fd6_screen.h"


#include "ir3/ir3_nir.h"
#include "a2xx/ir2.h"

/* XXX this should go away */
#include "state_tracker/drm_driver.h"

static const struct debug_named_value debug_options[] = {
                {"msgs",      FD_DBG_MSGS,   "Print debug messages"},
                {"disasm",    FD_DBG_DISASM, "Dump TGSI and adreno shader disassembly (a2xx only, see IR3_SHADER_DEBUG)"},
                {"dclear",    FD_DBG_DCLEAR, "Mark all state dirty after clear"},
                {"ddraw",     FD_DBG_DDRAW,  "Mark all state dirty after draw"},
                {"noscis",    FD_DBG_NOSCIS, "Disable scissor optimization"},
                {"direct",    FD_DBG_DIRECT, "Force inline (SS_DIRECT) state loads"},
                {"nobypass",  FD_DBG_NOBYPASS, "Disable GMEM bypass"},
                {"fraghalf",  FD_DBG_FRAGHALF, "Use half-precision in fragment shader"},
                {"nobin",     FD_DBG_NOBIN,  "Disable hw binning"},
                {"glsl120",   FD_DBG_GLSL120,"Temporary flag to force GLSL 1.20 (rather than 1.30) on a3xx+"},
                {"shaderdb",  FD_DBG_SHADERDB, "Enable shaderdb output"},
                {"flush",     FD_DBG_FLUSH,  "Force flush after every draw"},
                {"deqp",      FD_DBG_DEQP,   "Enable dEQP hacks"},
                {"inorder",   FD_DBG_INORDER,"Disable reordering for draws/blits"},
                {"bstat",     FD_DBG_BSTAT,  "Print batch stats at context destroy"},
                {"nogrow",    FD_DBG_NOGROW, "Disable \"growable\" cmdstream buffers, even if kernel supports it"},
                {"lrz",       FD_DBG_LRZ,    "Enable experimental LRZ support (a5xx+)"},
                {"noindirect",FD_DBG_NOINDR, "Disable hw indirect draws (emulate on CPU)"},
                {"noblit",    FD_DBG_NOBLIT, "Disable blitter (fallback to generic blit path)"},
                {"hiprio",    FD_DBG_HIPRIO, "Force high-priority context"},
                {"ttile",     FD_DBG_TTILE,  "Enable texture tiling (a5xx)"},
                {"perfcntrs", FD_DBG_PERFC,  "Expose performance counters"},
                {"softpin",   FD_DBG_SOFTPIN,"Enable softpin command submission (experimental)"},
                DEBUG_NAMED_VALUE_END
};

DEBUG_GET_ONCE_FLAGS_OPTION(fd_mesa_debug, "FD_MESA_DEBUG", debug_options, 0)

int fd_mesa_debug = 0;
bool fd_binning_enabled = true;
static bool glsl120 = false;

static const char *
fd_screen_get_name(struct pipe_screen *pscreen)
{
        static char buffer[128];
        util_snprintf(buffer, sizeof(buffer), "FD%03d",
                        fd_screen(pscreen)->device_id);
        return buffer;
}

static const char *
fd_screen_get_vendor(struct pipe_screen *pscreen)
{
        return "freedreno";
}

static const char *
fd_screen_get_device_vendor(struct pipe_screen *pscreen)
{
        return "Qualcomm";
}


static uint64_t
fd_screen_get_timestamp(struct pipe_screen *pscreen)
{
        struct fd_screen *screen = fd_screen(pscreen);

        if (screen->has_timestamp) {
                uint64_t n;
                fd_pipe_get_param(screen->pipe, FD_TIMESTAMP, &n);
                debug_assert(screen->max_freq > 0);
                return n * 1000000000 / screen->max_freq;
        } else {
                int64_t cpu_time = os_time_get() * 1000;
                return cpu_time + screen->cpu_gpu_time_delta;
        }

}

static void
fd_screen_destroy(struct pipe_screen *pscreen)
{
        struct fd_screen *screen = fd_screen(pscreen);

        if (screen->pipe)
                fd_pipe_del(screen->pipe);

        if (screen->dev)
                fd_device_del(screen->dev);

        if (screen->ro)
                FREE(screen->ro);

        fd_bc_fini(&screen->batch_cache);

        slab_destroy_parent(&screen->transfer_pool);

        mtx_destroy(&screen->lock);

        ralloc_free(screen->compiler);

        free(screen->perfcntr_queries);
        free(screen);
}

/*
TODO either move caps to a2xx/a3xx specific code, or maybe have some
tables for things that differ if the delta is not too much..
 */
static int
fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
{
        struct fd_screen *screen = fd_screen(pscreen);

        /* this is probably not totally correct.. but it's a start: */
        switch (param) {
        /* Supported features (boolean caps). */
        case PIPE_CAP_NPOT_TEXTURES:
        case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
        case PIPE_CAP_ANISOTROPIC_FILTER:
        case PIPE_CAP_POINT_SPRITE:
        case PIPE_CAP_BLEND_EQUATION_SEPARATE:
        case PIPE_CAP_TEXTURE_SWIZZLE:
        case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
        case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
        case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
        case PIPE_CAP_SEAMLESS_CUBE_MAP:
        case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
        case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
        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_BUFFER_MAP_PERSISTENT_COHERENT:
        case PIPE_CAP_STRING_MARKER:
        case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
        case PIPE_CAP_TEXTURE_BARRIER:
        case PIPE_CAP_INVALIDATE_BUFFER:
                return 1;

        case PIPE_CAP_VERTEXID_NOBASE:
                return is_a3xx(screen) || is_a4xx(screen);

        case PIPE_CAP_COMPUTE:
                return has_compute(screen);

        case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
        case PIPE_CAP_PCI_GROUP:
        case PIPE_CAP_PCI_BUS:
        case PIPE_CAP_PCI_DEVICE:
        case PIPE_CAP_PCI_FUNCTION:
        case PIPE_CAP_DEPTH_CLIP_DISABLE_SEPARATE:
                return 0;

        case PIPE_CAP_SM3:
        case PIPE_CAP_PRIMITIVE_RESTART:
        case PIPE_CAP_TGSI_INSTANCEID:
        case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
        case PIPE_CAP_INDEP_BLEND_ENABLE:
        case PIPE_CAP_INDEP_BLEND_FUNC:
        case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
        case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
        case PIPE_CAP_CONDITIONAL_RENDER:
        case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
        case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
        case PIPE_CAP_CLIP_HALFZ:
                return is_a3xx(screen) || is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen);

        case PIPE_CAP_FAKE_SW_MSAA:
                return !fd_screen_get_param(pscreen, PIPE_CAP_TEXTURE_MULTISAMPLE);

        case PIPE_CAP_TEXTURE_MULTISAMPLE:
                return is_a5xx(screen) || is_a6xx(screen);

        case PIPE_CAP_SURFACE_SAMPLE_COUNT:
                return is_a6xx(screen);

        case PIPE_CAP_DEPTH_CLIP_DISABLE:
                return is_a3xx(screen) || is_a4xx(screen);

        case PIPE_CAP_POLYGON_OFFSET_CLAMP:
                return is_a5xx(screen) || is_a6xx(screen);

        case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
                if (is_a3xx(screen)) return 16;
                if (is_a4xx(screen)) return 32;
                if (is_a5xx(screen)) return 32;
                if (is_a6xx(screen)) return 32;
                return 0;
        case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
                /* We could possibly emulate more by pretending 2d/rect textures and
                 * splitting high bits of index into 2nd dimension..
                 */
                if (is_a3xx(screen)) return 8192;
                if (is_a4xx(screen)) return 16384;
                if (is_a5xx(screen)) return 16384;
                if (is_a6xx(screen)) return 16384;
                return 0;

        case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
        case PIPE_CAP_CUBE_MAP_ARRAY:
        case PIPE_CAP_SAMPLER_VIEW_TARGET:
        case PIPE_CAP_TEXTURE_QUERY_LOD:
                return is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen);

        case PIPE_CAP_START_INSTANCE:
                /* Note that a5xx can do this, it just can't (at least with
                 * current firmware) do draw_indirect with base_instance.
                 * Since draw_indirect is needed sooner (gles31 and gl40 vs
                 * gl42), hide base_instance on a5xx.  :-/
                 */
                return is_a4xx(screen);

        case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
                return 64;

        case PIPE_CAP_GLSL_FEATURE_LEVEL:
        case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
                if (glsl120)
                        return 120;
                return is_ir3(screen) ? 140 : 120;

        case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
                if (is_a5xx(screen) || is_a6xx(screen))
                        return 4;
                return 0;

        case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
                if (is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen))
                        return 4;
                return 0;

        /* TODO if we need this, do it in nir/ir3 backend to avoid breaking precompile: */
        case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
                return 0;

        case PIPE_CAP_ALLOW_MAPPED_BUFFERS_DURING_EXECUTION:
                return 0;

        case PIPE_CAP_CONTEXT_PRIORITY_MASK:
                return screen->priority_mask;

        case PIPE_CAP_DRAW_INDIRECT:
                if (is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen))
                        return 1;
                return 0;

        case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
                if (is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen))
                        return 1;
                return 0;

        case PIPE_CAP_LOAD_CONSTBUF:
                /* name is confusing, but this turns on std430 packing */
                if (is_ir3(screen))
                        return 1;
                return 0;

        case PIPE_CAP_MAX_VIEWPORTS:
                return 1;

        case PIPE_CAP_SHAREABLE_SHADERS:
        case PIPE_CAP_GLSL_OPTIMIZE_CONSERVATIVELY:
        /* manage the variants for these ourself, to avoid breaking precompile: */
        case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
        case PIPE_CAP_VERTEX_COLOR_CLAMPED:
                if (is_ir3(screen))
                        return 1;
                return 0;

        /* Stream output. */
        case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
                if (is_ir3(screen))
                        return PIPE_MAX_SO_BUFFERS;
                return 0;
        case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
        case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
                if (is_ir3(screen))
                        return 1;
                return 0;
        case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
        case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
                if (is_ir3(screen))
                        return 16 * 4;   /* should only be shader out limit? */
                return 0;

        /* Texturing. */
        case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
        case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
                return MAX_MIP_LEVELS;
        case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
                return 11;

        case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
                return (is_a3xx(screen) || is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen)) ? 256 : 0;

        /* Render targets. */
        case PIPE_CAP_MAX_RENDER_TARGETS:
                return screen->max_rts;
        case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
                return is_a3xx(screen) ? 1 : 0;

        /* Queries. */
        case PIPE_CAP_OCCLUSION_QUERY:
                return is_a3xx(screen) || is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen);
        case PIPE_CAP_QUERY_TIMESTAMP:
        case PIPE_CAP_QUERY_TIME_ELAPSED:
                /* only a4xx, requires new enough kernel so we know max_freq: */
                return (screen->max_freq > 0) && (is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen));

        case PIPE_CAP_VENDOR_ID:
                return 0x5143;
        case PIPE_CAP_DEVICE_ID:
                return 0xFFFFFFFF;
        case PIPE_CAP_ACCELERATED:
                return 1;
        case PIPE_CAP_VIDEO_MEMORY:
                DBG("FINISHME: The value returned is incorrect\n");
                return 10;
        case PIPE_CAP_UMA:
                return 1;
        case PIPE_CAP_NATIVE_FENCE_FD:
                return fd_device_version(screen->dev) >= FD_VERSION_FENCE_FD;
        default:
                return u_pipe_screen_get_param_defaults(pscreen, param);
        }
}

static float
fd_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:
                /* NOTE: actual value is 127.0f, but this is working around a deqp
                 * bug.. dEQP-GLES3.functional.rasterization.primitives.lines_wide
                 * uses too small of a render target size, and gets confused when
                 * the lines start going offscreen.
                 *
                 * See: https://code.google.com/p/android/issues/detail?id=206513
                 */
                if (fd_mesa_debug & FD_DBG_DEQP)
                        return 48.0f;
                return 127.0f;
        case PIPE_CAPF_MAX_POINT_WIDTH:
        case PIPE_CAPF_MAX_POINT_WIDTH_AA:
                return 4092.0f;
        case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
                return 16.0f;
        case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
                return 15.0f;
        case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
        case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
        case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
                return 0.0f;
        }
        debug_printf("unknown paramf %d\n", param);
        return 0;
}

static int
fd_screen_get_shader_param(struct pipe_screen *pscreen,
                enum pipe_shader_type shader,
                enum pipe_shader_cap param)
{
        struct fd_screen *screen = fd_screen(pscreen);

        switch(shader)
        {
        case PIPE_SHADER_FRAGMENT:
        case PIPE_SHADER_VERTEX:
                break;
        case PIPE_SHADER_COMPUTE:
                if (has_compute(screen))
                        break;
                return 0;
        case PIPE_SHADER_GEOMETRY:
                /* maye we could emulate.. */
                return 0;
        default:
                DBG("unknown shader type %d", shader);
                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 8; /* XXX */
        case PIPE_SHADER_CAP_MAX_INPUTS:
        case PIPE_SHADER_CAP_MAX_OUTPUTS:
                return 16;
        case PIPE_SHADER_CAP_MAX_TEMPS:
                return 64; /* Max native temporaries. */
        case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
                /* NOTE: seems to be limit for a3xx is actually 512 but
                 * split between VS and FS.  Use lower limit of 256 to
                 * avoid getting into impossible situations:
                 */
                return ((is_a3xx(screen) || is_a4xx(screen) || is_a5xx(screen) || is_a6xx(screen)) ? 4096 : 64) * sizeof(float[4]);
        case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
                return is_ir3(screen) ? 16 : 1;
        case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
                return 1;
        case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
        case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
                /* Technically this should be the same as for TEMP/CONST, since
                 * everything is just normal registers.  This is just temporary
                 * hack until load_input/store_output handle arrays in a similar
                 * way as load_var/store_var..
                 */
                return 0;
        case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
        case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
                /* a2xx compiler doesn't handle indirect: */
                return is_ir3(screen) ? 1 : 0;
        case PIPE_SHADER_CAP_SUBROUTINES:
        case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
        case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
        case PIPE_SHADER_CAP_TGSI_LDEXP_SUPPORTED:
        case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
        case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
        case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTERS:
        case PIPE_SHADER_CAP_LOWER_IF_THRESHOLD:
        case PIPE_SHADER_CAP_TGSI_SKIP_MERGE_REGISTERS:
        case PIPE_SHADER_CAP_MAX_HW_ATOMIC_COUNTER_BUFFERS:
                return 0;
        case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
                return 1;
        case PIPE_SHADER_CAP_INTEGERS:
                if (glsl120)
                        return 0;
                return is_ir3(screen) ? 1 : 0;
        case PIPE_SHADER_CAP_INT64_ATOMICS:
                return 0;
        case PIPE_SHADER_CAP_FP16:
                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_NIR;
        case PIPE_SHADER_CAP_SUPPORTED_IRS:
                return (1 << PIPE_SHADER_IR_NIR) | (1 << PIPE_SHADER_IR_TGSI);
        case PIPE_SHADER_CAP_MAX_UNROLL_ITERATIONS_HINT:
                return 32;
        case PIPE_SHADER_CAP_SCALAR_ISA:
                return is_ir3(screen) ? 1 : 0;
        case PIPE_SHADER_CAP_MAX_SHADER_BUFFERS:
        case PIPE_SHADER_CAP_MAX_SHADER_IMAGES:
                if (is_a5xx(screen) || is_a6xx(screen)) {
                        /* a5xx (and a4xx for that matter) has one state-block
                         * for compute-shader SSBO's and another that is shared
                         * by VS/HS/DS/GS/FS..  so to simplify things for now
                         * just advertise SSBOs for FS and CS.  We could possibly
                         * do what blob does, and partition the space for
                         * VS/HS/DS/GS/FS.  The blob advertises:
                         *
                         *   GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS: 4
                         *   GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS: 4
                         *   GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS: 4
                         *   GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS: 4
                         *   GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS: 4
                         *   GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS: 24
                         *   GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS: 24
                         *
                         * I think that way we could avoid having to patch shaders
                         * for actual SSBO indexes by using a static partitioning.
                         *
                         * Note same state block is used for images and buffers,
                         * but images also need texture state for read access
                         * (isam/isam.3d)
                         */
                        switch(shader)
                        {
                        case PIPE_SHADER_FRAGMENT:
                        case PIPE_SHADER_COMPUTE:
                                return 24;
                        default:
                                return 0;
                        }
                }
                return 0;
        }
        debug_printf("unknown shader param %d\n", param);
        return 0;
}

/* TODO depending on how much the limits differ for a3xx/a4xx, maybe move this
 * into per-generation backend?
 */
static int
fd_get_compute_param(struct pipe_screen *pscreen, enum pipe_shader_ir ir_type,
                enum pipe_compute_cap param, void *ret)
{
        struct fd_screen *screen = fd_screen(pscreen);
        const char * const ir = "ir3";

        if (!has_compute(screen))
                return 0;

#define RET(x) do {                  \
   if (ret)                          \
      memcpy(ret, x, sizeof(x));     \
   return sizeof(x);                 \
} while (0)

        switch (param) {
        case PIPE_COMPUTE_CAP_ADDRESS_BITS:
// don't expose 64b pointer support yet, until ir3 supports 64b
// math, otherwise spir64 target is used and we get 64b pointer
// calculations that we can't do yet
//              if (is_a5xx(screen))
//                      RET((uint32_t []){ 64 });
                RET((uint32_t []){ 32 });

        case PIPE_COMPUTE_CAP_IR_TARGET:
                if (ret)
                        sprintf(ret, ir);
                return strlen(ir) * sizeof(char);

        case PIPE_COMPUTE_CAP_GRID_DIMENSION:
                RET((uint64_t []) { 3 });

        case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
                RET(((uint64_t []) { 65535, 65535, 65535 }));

        case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
                RET(((uint64_t []) { 1024, 1024, 64 }));

        case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
                RET((uint64_t []) { 1024 });

        case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
                RET((uint64_t []) { screen->ram_size });

        case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
                RET((uint64_t []) { 32768 });

        case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
        case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
                RET((uint64_t []) { 4096 });

        case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
                RET((uint64_t []) { screen->ram_size });

        case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
                RET((uint32_t []) { screen->max_freq / 1000000 });

        case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
                RET((uint32_t []) { 9999 });  // TODO

        case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
                RET((uint32_t []) { 1 });

        case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
                RET((uint32_t []) { 32 });  // TODO

        case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
                RET((uint64_t []) { 1024 }); // TODO
        }

        return 0;
}

static const void *
fd_get_compiler_options(struct pipe_screen *pscreen,
                enum pipe_shader_ir ir, unsigned shader)
{
        struct fd_screen *screen = fd_screen(pscreen);

        if (is_ir3(screen))
                return ir3_get_compiler_options(screen->compiler);

        return ir2_get_compiler_options();
}

boolean
fd_screen_bo_get_handle(struct pipe_screen *pscreen,
                struct fd_bo *bo,
                struct renderonly_scanout *scanout,
                unsigned stride,
                struct winsys_handle *whandle)
{
        whandle->stride = stride;

        if (whandle->type == WINSYS_HANDLE_TYPE_SHARED) {
                return fd_bo_get_name(bo, &whandle->handle) == 0;
        } else if (whandle->type == WINSYS_HANDLE_TYPE_KMS) {
                if (renderonly_get_handle(scanout, whandle))
                        return TRUE;
                whandle->handle = fd_bo_handle(bo);
                return TRUE;
        } else if (whandle->type == WINSYS_HANDLE_TYPE_FD) {
                whandle->handle = fd_bo_dmabuf(bo);
                return TRUE;
        } else {
                return FALSE;
        }
}

static void
fd_screen_query_dmabuf_modifiers(struct pipe_screen *pscreen,
                enum pipe_format format,
                int max, uint64_t *modifiers,
                unsigned int *external_only,
                int *count)
{
        struct fd_screen *screen = fd_screen(pscreen);
        int i, num = 0;

        max = MIN2(max, screen->num_supported_modifiers);

        if (!max) {
                max = screen->num_supported_modifiers;
                external_only = NULL;
                modifiers = NULL;
        }

        for (i = 0; i < max; i++) {
                if (modifiers)
                        modifiers[num] = screen->supported_modifiers[i];

                if (external_only)
                        external_only[num] = 0;

                num++;
        }

        *count = num;
}

struct fd_bo *
fd_screen_bo_from_handle(struct pipe_screen *pscreen,
                struct winsys_handle *whandle)
{
        struct fd_screen *screen = fd_screen(pscreen);
        struct fd_bo *bo;

        if (whandle->type == WINSYS_HANDLE_TYPE_SHARED) {
                bo = fd_bo_from_name(screen->dev, whandle->handle);
        } else if (whandle->type == WINSYS_HANDLE_TYPE_KMS) {
                bo = fd_bo_from_handle(screen->dev, whandle->handle, 0);
        } else if (whandle->type == WINSYS_HANDLE_TYPE_FD) {
                bo = fd_bo_from_dmabuf(screen->dev, whandle->handle);
        } else {
                DBG("Attempt to import unsupported handle type %d", whandle->type);
                return NULL;
        }

        if (!bo) {
                DBG("ref name 0x%08x failed", whandle->handle);
                return NULL;
        }

        return bo;
}

struct pipe_screen *
fd_screen_create(struct fd_device *dev, struct renderonly *ro)
{
        struct fd_screen *screen = CALLOC_STRUCT(fd_screen);
        struct pipe_screen *pscreen;
        uint64_t val;

        fd_mesa_debug = debug_get_option_fd_mesa_debug();

        if (fd_mesa_debug & FD_DBG_NOBIN)
                fd_binning_enabled = false;

        glsl120 = !!(fd_mesa_debug & FD_DBG_GLSL120);

        if (!screen)
                return NULL;

        pscreen = &screen->base;

        screen->dev = dev;
        screen->refcnt = 1;

        if (ro) {
                screen->ro = renderonly_dup(ro);
                if (!screen->ro) {
                        DBG("could not create renderonly object");
                        goto fail;
                }
        }

        // maybe this should be in context?
        screen->pipe = fd_pipe_new(screen->dev, FD_PIPE_3D);
        if (!screen->pipe) {
                DBG("could not create 3d pipe");
                goto fail;
        }

        if (fd_pipe_get_param(screen->pipe, FD_GMEM_SIZE, &val)) {
                DBG("could not get GMEM size");
                goto fail;
        }
        screen->gmemsize_bytes = val;

        if (fd_pipe_get_param(screen->pipe, FD_DEVICE_ID, &val)) {
                DBG("could not get device-id");
                goto fail;
        }
        screen->device_id = val;

        if (fd_pipe_get_param(screen->pipe, FD_MAX_FREQ, &val)) {
                DBG("could not get gpu freq");
                /* this limits what performance related queries are
                 * supported but is not fatal
                 */
                screen->max_freq = 0;
        } else {
                screen->max_freq = val;
                if (fd_pipe_get_param(screen->pipe, FD_TIMESTAMP, &val) == 0)
                        screen->has_timestamp = true;
        }

        if (fd_pipe_get_param(screen->pipe, FD_GPU_ID, &val)) {
                DBG("could not get gpu-id");
                goto fail;
        }
        screen->gpu_id = val;

        if (fd_pipe_get_param(screen->pipe, FD_CHIP_ID, &val)) {
                DBG("could not get chip-id");
                /* older kernels may not have this property: */
                unsigned core  = screen->gpu_id / 100;
                unsigned major = (screen->gpu_id % 100) / 10;
                unsigned minor = screen->gpu_id % 10;
                unsigned patch = 0;  /* assume the worst */
                val = (patch & 0xff) | ((minor & 0xff) << 8) |
                        ((major & 0xff) << 16) | ((core & 0xff) << 24);
        }
        screen->chip_id = val;

        if (fd_pipe_get_param(screen->pipe, FD_NR_RINGS, &val)) {
                DBG("could not get # of rings");
                screen->priority_mask = 0;
        } else {
                /* # of rings equates to number of unique priority values: */
                screen->priority_mask = (1 << val) - 1;
        }

        struct sysinfo si;
        sysinfo(&si);
        screen->ram_size = si.totalram;

        DBG("Pipe Info:");
        DBG(" GPU-id:          %d", screen->gpu_id);
        DBG(" Chip-id:         0x%08x", screen->chip_id);
        DBG(" GMEM size:       0x%08x", screen->gmemsize_bytes);

        /* explicitly checking for GPU revisions that are known to work.  This
         * may be overly conservative for a3xx, where spoofing the gpu_id with
         * the blob driver seems to generate identical cmdstream dumps.  But
         * on a2xx, there seem to be small differences between the GPU revs
         * so it is probably better to actually test first on real hardware
         * before enabling:
         *
         * If you have a different adreno version, feel free to add it to one
         * of the cases below and see what happens.  And if it works, please
         * send a patch ;-)
         */
        switch (screen->gpu_id) {
        case 200:
        case 201:
        case 205:
        case 220:
                fd2_screen_init(pscreen);
                break;
        case 305:
        case 307:
        case 320:
        case 330:
                fd3_screen_init(pscreen);
                break;
        case 420:
        case 430:
                fd4_screen_init(pscreen);
                break;
        case 530:
                fd5_screen_init(pscreen);
                break;
        case 630:
                fd6_screen_init(pscreen);
                break;
        default:
                debug_printf("unsupported GPU: a%03d\n", screen->gpu_id);
                goto fail;
        }

        if (screen->gpu_id >= 600) {
                screen->gmem_alignw = 32;
                screen->gmem_alignh = 32;
                screen->num_vsc_pipes = 32;
        } else if (screen->gpu_id >= 500) {
                screen->gmem_alignw = 64;
                screen->gmem_alignh = 32;
                screen->num_vsc_pipes = 16;
        } else {
                screen->gmem_alignw = 32;
                screen->gmem_alignh = 32;
                screen->num_vsc_pipes = 8;
        }

        /* NOTE: don't enable reordering on a2xx, since completely untested.
         * Also, don't enable if we have too old of a kernel to support
         * growable cmdstream buffers, since memory requirement for cmdstream
         * buffers would be too much otherwise.
         */
        if ((screen->gpu_id >= 300) && (fd_device_version(dev) >= FD_VERSION_UNLIMITED_CMDS))
                screen->reorder = !(fd_mesa_debug & FD_DBG_INORDER);

        fd_bc_init(&screen->batch_cache);

        (void) mtx_init(&screen->lock, mtx_plain);

        pscreen->destroy = fd_screen_destroy;
        pscreen->get_param = fd_screen_get_param;
        pscreen->get_paramf = fd_screen_get_paramf;
        pscreen->get_shader_param = fd_screen_get_shader_param;
        pscreen->get_compute_param = fd_get_compute_param;
        pscreen->get_compiler_options = fd_get_compiler_options;

        fd_resource_screen_init(pscreen);
        fd_query_screen_init(pscreen);

        pscreen->get_name = fd_screen_get_name;
        pscreen->get_vendor = fd_screen_get_vendor;
        pscreen->get_device_vendor = fd_screen_get_device_vendor;

        pscreen->get_timestamp = fd_screen_get_timestamp;

        pscreen->fence_reference = fd_fence_ref;
        pscreen->fence_finish = fd_fence_finish;
        pscreen->fence_get_fd = fd_fence_get_fd;

        pscreen->query_dmabuf_modifiers = fd_screen_query_dmabuf_modifiers;

        if (!screen->supported_modifiers) {
                static const uint64_t supported_modifiers[] = {
                        DRM_FORMAT_MOD_LINEAR,
                };

                screen->supported_modifiers = supported_modifiers;
                screen->num_supported_modifiers = ARRAY_SIZE(supported_modifiers);
        }

        slab_create_parent(&screen->transfer_pool, sizeof(struct fd_transfer), 16);

        return pscreen;

fail:
        fd_screen_destroy(pscreen);
        return NULL;
}