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, 350 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_resource.c b/src/gallium/drivers/vc4/vc4_resource.c
new file mode 100644
index 0000000..67ddfeb
--- /dev/null
+++ b/src/gallium/drivers/vc4/vc4_resource.c
@@ -0,0 +1,350 @@
+/*
+ * Copyright © 2014 Broadcom
+ * 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.
+ */
+
+#include <stdio.h>
+
+#include "util/u_memory.h"
+#include "util/u_format.h"
+#include "util/u_inlines.h"
+#include "util/u_surface.h"
+#include "util/u_blitter.h"
+
+#include "vc4_screen.h"
+#include "vc4_context.h"
+#include "vc4_resource.h"
+
+static void
+vc4_resource_transfer_unmap(struct pipe_context *pctx,
+                            struct pipe_transfer *ptrans)
+{
+        struct vc4_context *vc4 = vc4_context(pctx);
+
+        pipe_resource_reference(&ptrans->resource, NULL);
+        util_slab_free(&vc4->transfer_pool, ptrans);
+}
+
+static void *
+vc4_resource_transfer_map(struct pipe_context *pctx,
+                          struct pipe_resource *prsc,
+                          unsigned level, unsigned usage,
+                          const struct pipe_box *box,
+                          struct pipe_transfer **pptrans)
+{
+        struct vc4_context *vc4 = vc4_context(pctx);
+        struct vc4_resource *rsc = vc4_resource(prsc);
+        struct pipe_transfer *ptrans;
+        enum pipe_format format = prsc->format;
+        char *buf;
+
+        ptrans = util_slab_alloc(&vc4->transfer_pool);
+        if (!ptrans)
+                return NULL;
+
+        /* util_slab_alloc() doesn't zero: */
+        memset(ptrans, 0, sizeof(*ptrans));
+
+        pipe_resource_reference(&ptrans->resource, prsc);
+        ptrans->level = level;
+        ptrans->usage = usage;
+        ptrans->box = *box;
+        ptrans->stride = rsc->slices[level].stride;
+        ptrans->layer_stride = ptrans->stride;
+
+        /* Note that the current kernel implementation is synchronous, so no
+         * need to do syncing stuff here yet.
+         */
+
+        buf = vc4_bo_map(rsc->bo);
+        if (!buf) {
+                fprintf(stderr, "Failed to map bo\n");
+                goto fail;
+        }
+
+        *pptrans = ptrans;
+
+        return buf + rsc->slices[level].offset +
+                box->y / util_format_get_blockheight(format) * ptrans->stride +
+                box->x / util_format_get_blockwidth(format) * rsc->cpp +
+                box->z * rsc->slices[level].size0;
+
+fail:
+        vc4_resource_transfer_unmap(pctx, ptrans);
+        return NULL;
+}
+
+static void
+vc4_resource_destroy(struct pipe_screen *pscreen,
+                     struct pipe_resource *prsc)
+{
+        struct vc4_resource *rsc = vc4_resource(prsc);
+        vc4_bo_unreference(&rsc->bo);
+        free(rsc);
+}
+
+static boolean
+vc4_resource_get_handle(struct pipe_screen *pscreen,
+                        struct pipe_resource *prsc,
+                        struct winsys_handle *handle)
+{
+        struct vc4_resource *rsc = vc4_resource(prsc);
+
+        return vc4_screen_bo_get_handle(pscreen, rsc->bo, rsc->slices[0].stride,
+                                        handle);
+}
+
+static const struct u_resource_vtbl vc4_resource_vtbl = {
+        .resource_get_handle      = vc4_resource_get_handle,
+        .resource_destroy         = vc4_resource_destroy,
+        .transfer_map             = vc4_resource_transfer_map,
+        .transfer_flush_region    = u_default_transfer_flush_region,
+        .transfer_unmap           = vc4_resource_transfer_unmap,
+        .transfer_inline_write    = u_default_transfer_inline_write,
+};
+
+static void
+vc4_setup_slices(struct vc4_resource *rsc)
+{
+        struct pipe_resource *prsc = &rsc->base.b;
+        uint32_t width = prsc->width0;
+        uint32_t height = prsc->height0;
+        uint32_t depth = prsc->depth0;
+        uint32_t offset = 0;
+
+        for (int i = prsc->last_level; i >= 0; i--) {
+                struct vc4_resource_slice *slice = &rsc->slices[i];
+                uint32_t level_width = u_minify(width, i);
+                uint32_t level_height = u_minify(height, i);
+
+                slice->offset = offset;
+                slice->stride = align(level_width * rsc->cpp, 16);
+                slice->size0 = level_height * slice->stride;
+
+                /* Note, since we have cubes but no 3D, depth is invariant
+                 * with miplevel.
+                 */
+                offset += slice->size0 * depth;
+        }
+        /* XXX: align level 0 offset? */
+}
+
+static struct vc4_resource *
+vc4_resource_setup(struct pipe_screen *pscreen,
+                   const struct pipe_resource *tmpl)
+{
+        struct vc4_resource *rsc = CALLOC_STRUCT(vc4_resource);
+        if (!rsc)
+                return NULL;
+        struct pipe_resource *prsc = &rsc->base.b;
+
+        *prsc = *tmpl;
+
+        pipe_reference_init(&prsc->reference, 1);
+        prsc->screen = pscreen;
+
+        rsc->base.vtbl = &vc4_resource_vtbl;
+        rsc->cpp = util_format_get_blocksize(tmpl->format);
+
+        assert(rsc->cpp);
+
+        return rsc;
+}
+
+static struct pipe_resource *
+vc4_resource_create(struct pipe_screen *pscreen,
+                    const struct pipe_resource *tmpl)
+{
+        struct vc4_resource *rsc = vc4_resource_setup(pscreen, tmpl);
+        struct pipe_resource *prsc = &rsc->base.b;
+
+        vc4_setup_slices(rsc);
+
+        rsc->bo = vc4_bo_alloc(vc4_screen(pscreen),
+                               rsc->slices[0].offset +
+                               rsc->slices[0].size0 * prsc->depth0,
+                               "resource");
+        if (!rsc->bo)
+                goto fail;
+
+        return prsc;
+fail:
+        vc4_resource_destroy(pscreen, prsc);
+        return NULL;
+}
+
+static struct pipe_resource *
+vc4_resource_from_handle(struct pipe_screen *pscreen,
+                         const struct pipe_resource *tmpl,
+                         struct winsys_handle *handle)
+{
+        struct vc4_resource *rsc = vc4_resource_setup(pscreen, tmpl);
+        struct pipe_resource *prsc = &rsc->base.b;
+        struct vc4_resource_slice *slice = &rsc->slices[0];
+
+        if (!rsc)
+                return NULL;
+
+        rsc->bo = vc4_screen_bo_from_handle(pscreen, handle, &slice->stride);
+        if (!rsc->bo)
+                goto fail;
+
+#ifdef USE_VC4_SIMULATOR
+        slice->stride = align(prsc->width0 * rsc->cpp, 16);
+#endif
+
+        return prsc;
+
+fail:
+        vc4_resource_destroy(pscreen, prsc);
+        return NULL;
+}
+
+static struct pipe_surface *
+vc4_create_surface(struct pipe_context *pctx,
+                   struct pipe_resource *ptex,
+                   const struct pipe_surface *surf_tmpl)
+{
+        struct vc4_surface *surface = CALLOC_STRUCT(vc4_surface);
+
+        if (!surface)
+                return NULL;
+
+        assert(surf_tmpl->u.tex.first_layer == surf_tmpl->u.tex.last_layer);
+
+        struct pipe_surface *psurf = &surface->base;
+        unsigned level = surf_tmpl->u.tex.level;
+
+        pipe_reference_init(&psurf->reference, 1);
+        pipe_resource_reference(&psurf->texture, ptex);
+
+        psurf->context = pctx;
+        psurf->format = surf_tmpl->format;
+        psurf->width = u_minify(ptex->width0, level);
+        psurf->height = u_minify(ptex->height0, level);
+        psurf->u.tex.level = level;
+        psurf->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
+        psurf->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
+
+        return &surface->base;
+}
+
+static void
+vc4_surface_destroy(struct pipe_context *pctx, struct pipe_surface *psurf)
+{
+        pipe_resource_reference(&psurf->texture, NULL);
+        FREE(psurf);
+}
+
+static void
+vc4_flush_resource(struct pipe_context *pctx, struct pipe_resource *resource)
+{
+        struct vc4_context *vc4 = vc4_context(pctx);
+
+        /* XXX: Skip this if we don't have any queued drawing to it. */
+        vc4->base.flush(pctx, NULL, 0);
+}
+static bool
+render_blit(struct pipe_context *ctx, struct pipe_blit_info *info)
+{
+        struct vc4_context *vc4 = vc4_context(ctx);
+
+        if (!util_blitter_is_blit_supported(vc4->blitter, info)) {
+                fprintf(stderr, "blit unsupported %s -> %s",
+                    util_format_short_name(info->src.resource->format),
+                    util_format_short_name(info->dst.resource->format));
+                return false;
+        }
+
+        util_blitter_save_vertex_buffer_slot(vc4->blitter, vc4->vertexbuf.vb);
+        util_blitter_save_vertex_elements(vc4->blitter, vc4->vtx);
+        util_blitter_save_vertex_shader(vc4->blitter, vc4->prog.vs);
+        util_blitter_save_rasterizer(vc4->blitter, vc4->rasterizer);
+        util_blitter_save_viewport(vc4->blitter, &vc4->viewport);
+        util_blitter_save_scissor(vc4->blitter, &vc4->scissor);
+        util_blitter_save_fragment_shader(vc4->blitter, vc4->prog.fs);
+        util_blitter_save_blend(vc4->blitter, vc4->blend);
+        util_blitter_save_depth_stencil_alpha(vc4->blitter, vc4->zsa);
+        util_blitter_save_stencil_ref(vc4->blitter, &vc4->stencil_ref);
+        util_blitter_save_sample_mask(vc4->blitter, vc4->sample_mask);
+        util_blitter_save_framebuffer(vc4->blitter, &vc4->framebuffer);
+        util_blitter_save_fragment_sampler_states(vc4->blitter,
+                        vc4->fragtex.num_samplers,
+                        (void **)vc4->fragtex.samplers);
+        util_blitter_save_fragment_sampler_views(vc4->blitter,
+                        vc4->fragtex.num_textures, vc4->fragtex.textures);
+
+        util_blitter_blit(vc4->blitter, info);
+
+        return true;
+}
+
+/* Optimal hardware path for blitting pixels.
+ * Scaling, format conversion, up- and downsampling (resolve) are allowed.
+ */
+static void
+vc4_blit(struct pipe_context *pctx, const struct pipe_blit_info *blit_info)
+{
+        struct pipe_blit_info info = *blit_info;
+
+        if (info.src.resource->nr_samples > 1 &&
+            info.dst.resource->nr_samples <= 1 &&
+            !util_format_is_depth_or_stencil(info.src.resource->format) &&
+            !util_format_is_pure_integer(info.src.resource->format)) {
+                fprintf(stderr, "color resolve unimplemented");
+                return;
+        }
+
+        if (util_try_blit_via_copy_region(pctx, &info)) {
+                return; /* done */
+        }
+
+        if (info.mask & PIPE_MASK_S) {
+                fprintf(stderr, "cannot blit stencil, skipping");
+                info.mask &= ~PIPE_MASK_S;
+        }
+
+        render_blit(pctx, &info);
+}
+
+void
+vc4_resource_screen_init(struct pipe_screen *pscreen)
+{
+        pscreen->resource_create = vc4_resource_create;
+        pscreen->resource_from_handle = vc4_resource_from_handle;
+        pscreen->resource_get_handle = u_resource_get_handle_vtbl;
+        pscreen->resource_destroy = u_resource_destroy_vtbl;
+}
+
+void
+vc4_resource_context_init(struct pipe_context *pctx)
+{
+        pctx->transfer_map = u_transfer_map_vtbl;
+        pctx->transfer_flush_region = u_transfer_flush_region_vtbl;
+        pctx->transfer_unmap = u_transfer_unmap_vtbl;
+        pctx->transfer_inline_write = u_transfer_inline_write_vtbl;
+        pctx->create_surface = vc4_create_surface;
+        pctx->surface_destroy = vc4_surface_destroy;
+        pctx->resource_copy_region = util_resource_copy_region;
+        pctx->blit = vc4_blit;
+        pctx->flush_resource = vc4_flush_resource;
+}