panfrost: Break out fragment to SFBD/MFBD files

This substantially cleans up the corresponding logic at the expense of a
bit of code duplication; nevertheless, it's a net win since otherwise
incompatible hardware code is mixed confusingly.

Signed-off-by: Alyssa Rosenzweig <[email protected]>

1 files changed, 150 insertions, 0 deletions

diff --git a/src/gallium/drivers/panfrost/pan_sfbd.c b/src/gallium/drivers/panfrost/pan_sfbd.c
new file mode 100644
index 00000000000..d04da20e258
--- /dev/null
+++ b/src/gallium/drivers/panfrost/pan_sfbd.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2018-2019 Alyssa Rosenzweig
+ *
+ * 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 "pan_context.h"
+#include "pan_util.h"
+#include "pan_format.h"
+
+#include "util/u_format.h"
+
+static unsigned
+panfrost_sfbd_format(struct pipe_surface *surf)
+{
+        /* TODO */
+        return 0xb84e0281; /* RGB32, no MSAA */
+}
+
+static void
+panfrost_sfbd_enable_msaa(struct panfrost_context *ctx)
+{
+        ctx->fragment_sfbd.format |= MALI_FRAMEBUFFER_MSAA_A | MALI_FRAMEBUFFER_MSAA_B;
+}
+
+static void
+panfrost_sfbd_clear(struct panfrost_job *job)
+{
+        struct panfrost_context *ctx = job->ctx;
+        struct mali_single_framebuffer *sfbd = &ctx->fragment_sfbd;
+
+        if (job->clear & PIPE_CLEAR_COLOR) {
+                sfbd->clear_color_1 = job->clear_color;
+                sfbd->clear_color_2 = job->clear_color;
+                sfbd->clear_color_3 = job->clear_color;
+                sfbd->clear_color_4 = job->clear_color;
+        }
+
+        if (job->clear & PIPE_CLEAR_DEPTH) {
+                sfbd->clear_depth_1 = job->clear_depth;
+                sfbd->clear_depth_2 = job->clear_depth;
+                sfbd->clear_depth_3 = job->clear_depth;
+                sfbd->clear_depth_4 = job->clear_depth;
+
+                sfbd->depth_buffer = ctx->depth_stencil_buffer.gpu;
+                sfbd->depth_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
+        }
+
+        if (job->clear & PIPE_CLEAR_STENCIL) {
+                sfbd->clear_stencil = job->clear_stencil;
+
+                sfbd->stencil_buffer = ctx->depth_stencil_buffer.gpu;
+                sfbd->stencil_buffer_enable = MALI_DEPTH_STENCIL_ENABLE;
+        }
+
+        /* Set flags based on what has been cleared, for the SFBD case */
+        /* XXX: What do these flags mean? */
+        int clear_flags = 0x101100;
+
+        if (!(job->clear & ~(PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
+                /* On a tiler like this, it's fastest to clear all three buffers at once */
+
+                clear_flags |= MALI_CLEAR_FAST;
+        } else {
+                clear_flags |= MALI_CLEAR_SLOW;
+
+                if (job->clear & PIPE_CLEAR_STENCIL)
+                        clear_flags |= MALI_CLEAR_SLOW_STENCIL;
+        }
+
+        sfbd->clear_flags = clear_flags;
+}
+
+static void
+panfrost_sfbd_set_cbuf(
+                struct panfrost_context *ctx,
+                struct pipe_surface *surf)
+{
+        struct panfrost_resource *rsrc = pan_resource(surf->texture);
+
+        signed stride =
+                util_format_get_stride(surf->format, surf->texture->width0);
+
+        ctx->fragment_sfbd.format = panfrost_sfbd_format(surf);
+
+        if (rsrc->bo->layout == PAN_LINEAR) {
+                mali_ptr framebuffer = rsrc->bo->gpu[0];
+
+                /* The default is upside down from OpenGL's perspective. */
+                if (panfrost_is_scanout(ctx)) {
+                        framebuffer += stride * (surf->texture->height0 - 1);
+                        stride = -stride;
+                }
+
+                ctx->fragment_sfbd.framebuffer = framebuffer;
+                ctx->fragment_sfbd.stride = stride;
+        } else {
+                fprintf(stderr, "Invalid render layout\n");
+                assert(0);
+        }
+}
+
+static void
+panfrost_sfbd_set_targets(struct panfrost_context *ctx)
+{
+        assert(ctx->pipe_framebuffer.nr_cbufs == 1);
+        panfrost_sfbd_set_cbuf(ctx, ctx->pipe_framebuffer.cbufs[0]);
+
+        if (ctx->pipe_framebuffer.zsbuf) {
+                /* TODO */
+        }
+}
+
+/* Creates an SFBD for the FRAGMENT section of the bound framebuffer */
+
+mali_ptr
+panfrost_sfbd_fragment(struct panfrost_context *ctx)
+{
+        struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
+
+        struct mali_single_framebuffer fb = panfrost_emit_sfbd(ctx);
+        memcpy(&ctx->fragment_sfbd, &fb, sizeof(fb));
+
+        panfrost_sfbd_clear(job);
+        panfrost_sfbd_set_targets(ctx);
+
+        if (job->msaa)
+                panfrost_sfbd_enable_msaa(ctx);
+
+        return MALI_SFBD |
+                panfrost_upload_transient(ctx, &ctx->fragment_sfbd, sizeof(fb));
+}