src/gallium/drivers/panfrost/pan_sfbd.c

   1 /*
   2  * Copyright 2018-2019 Alyssa Rosenzweig
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24
  25 #include "pan_bo.h"
  26 #include "pan_context.h"
  27 #include "pan_util.h"
  28 #include "pan_format.h"
  29
  30 #include "util/format/u_format.h"
  31
  32 static struct mali_sfbd_format
  33 panfrost_sfbd_format(struct pipe_surface *surf)
  34 {
  35         /* Explode details on the format */
  36
  37         const struct util_format_description *desc =
  38                 util_format_description(surf->format);
  39
  40         /* The swizzle for rendering is inverted from texturing */
  41
  42         unsigned char swizzle[4];
  43         panfrost_invert_swizzle(desc->swizzle, swizzle);
  44
  45         struct mali_sfbd_format fmt = {
  46                 .unk1 = 0x1,
  47                 .swizzle = panfrost_translate_swizzle_4(swizzle),
  48                 .nr_channels = MALI_POSITIVE(desc->nr_channels),
  49                 .unk2 = 0x4,
  50                 .unk3 = 0xb,
  51         };
  52
  53         if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
  54                 fmt.unk2 |= MALI_SFBD_FORMAT_SRGB;
  55
  56         /* sRGB handled as a dedicated flag */
  57         enum pipe_format linearized = util_format_linear(surf->format);
  58
  59         /* If RGB, we're good to go */
  60         if (util_format_is_unorm8(desc))
  61                 return fmt;
  62
  63         switch (linearized) {
  64         case PIPE_FORMAT_B5G6R5_UNORM:
  65                 fmt.unk1 = 0x5;
  66                 fmt.nr_channels = MALI_POSITIVE(2);
  67                 fmt.unk2 = 0x5;
  68                 break;
  69
  70         case PIPE_FORMAT_A4B4G4R4_UNORM:
  71         case PIPE_FORMAT_B4G4R4A4_UNORM:
  72                 fmt.unk1 = 0x4;
  73                 fmt.nr_channels = MALI_POSITIVE(1);
  74                 fmt.unk2 = 0x5;
  75                 break;
  76
  77         default:
  78                 unreachable("Invalid format rendering");
  79         }
  80
  81         return fmt;
  82 }
  83
  84 static void
  85 panfrost_sfbd_clear(
  86         struct panfrost_batch *batch,
  87         struct mali_single_framebuffer *sfbd)
  88 {
  89         if (batch->clear & PIPE_CLEAR_COLOR) {
  90                 sfbd->clear_color_1 = batch->clear_color[0][0];
  91                 sfbd->clear_color_2 = batch->clear_color[0][1];
  92                 sfbd->clear_color_3 = batch->clear_color[0][2];
  93                 sfbd->clear_color_4 = batch->clear_color[0][3];
  94         }
  95
  96         if (batch->clear & PIPE_CLEAR_DEPTH) {
  97                 sfbd->clear_depth_1 = batch->clear_depth;
  98                 sfbd->clear_depth_2 = batch->clear_depth;
  99                 sfbd->clear_depth_3 = batch->clear_depth;
 100                 sfbd->clear_depth_4 = batch->clear_depth;
 101         }
 102
 103         if (batch->clear & PIPE_CLEAR_STENCIL) {
 104                 sfbd->clear_stencil = batch->clear_stencil;
 105         }
 106
 107         /* Set flags based on what has been cleared, for the SFBD case */
 108         /* XXX: What do these flags mean? */
 109         int clear_flags = 0x101100;
 110
 111         if (!(batch->clear & ~(PIPE_CLEAR_COLOR | PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
 112                 /* On a tiler like this, it's fastest to clear all three buffers at once */
 113
 114                 clear_flags |= MALI_CLEAR_FAST;
 115         } else {
 116                 clear_flags |= MALI_CLEAR_SLOW;
 117
 118                 if (batch->clear & PIPE_CLEAR_STENCIL)
 119                         clear_flags |= MALI_CLEAR_SLOW_STENCIL;
 120         }
 121
 122         sfbd->clear_flags = clear_flags;
 123 }
 124
 125 static void
 126 panfrost_sfbd_set_cbuf(
 127         struct mali_single_framebuffer *fb,
 128         struct pipe_surface *surf)
 129 {
 130         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 131
 132         unsigned level = surf->u.tex.level;
 133         unsigned first_layer = surf->u.tex.first_layer;
 134         assert(surf->u.tex.last_layer == first_layer);
 135         signed stride = rsrc->slices[level].stride;
 136
 137         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 138
 139         fb->format = panfrost_sfbd_format(surf);
 140
 141         fb->framebuffer = base;
 142         fb->stride = stride;
 143
 144         if (rsrc->layout == PAN_LINEAR)
 145                 fb->format.block = MALI_BLOCK_LINEAR;
 146         else if (rsrc->layout == PAN_TILED) {
 147                 fb->format.block = MALI_BLOCK_TILED;
 148                 fb->stride *= 16;
 149         } else {
 150                 fprintf(stderr, "Invalid render layout\n");
 151                 assert(0);
 152         }
 153 }
 154
 155 static void
 156 panfrost_sfbd_set_zsbuf(
 157         struct mali_single_framebuffer *fb,
 158         struct pipe_surface *surf)
 159 {
 160         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 161         struct panfrost_context *ctx = pan_context(surf->context);
 162
 163         unsigned level = surf->u.tex.level;
 164         assert(surf->u.tex.first_layer == 0);
 165
 166         if (rsrc->layout != PAN_TILED)
 167                 unreachable("Invalid render layout.");
 168
 169         fb->depth_buffer = rsrc->bo->gpu + rsrc->slices[level].offset;
 170         fb->depth_stride = rsrc->slices[level].stride;
 171
 172         /* No stencil? Job done. */
 173         if (!ctx->depth_stencil || !ctx->depth_stencil->stencil[0].enabled)
 174                 return;
 175
 176         if (panfrost_is_z24s8_variant(surf->format)) {
 177
 178                 /* Stencil data is interleaved with depth */
 179                 fb->stencil_buffer = fb->depth_buffer;
 180                 fb->stencil_stride = fb->depth_stride;
 181         } else if (surf->format == PIPE_FORMAT_Z32_UNORM ||
 182                    surf->format == PIPE_FORMAT_Z32_FLOAT) {
 183
 184                 /* No stencil, nothing to do */
 185         } else if (surf->format == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT) {
 186
 187                 /* Stencil data in separate buffer */
 188                 struct panfrost_resource *stencil = rsrc->separate_stencil;
 189                 struct panfrost_slice stencil_slice = stencil->slices[level];
 190
 191                 fb->stencil_buffer = stencil->bo->gpu + stencil_slice.offset;
 192                 fb->stencil_stride = stencil_slice.stride;
 193         } else
 194                 unreachable("Unsupported depth/stencil format.");
 195 }
 196
 197
 198 static struct mali_single_framebuffer
 199 panfrost_emit_sfbd(struct panfrost_batch *batch, unsigned vertex_count)
 200 {
 201         struct panfrost_context *ctx = batch->ctx;
 202         struct pipe_context *gallium = (struct pipe_context *) ctx;
 203         struct panfrost_screen *screen = pan_screen(gallium->screen);
 204
 205         unsigned width = batch->key.width;
 206         unsigned height = batch->key.height;
 207
 208         /* TODO: Why do we need to make the stack bigger than other platforms? */
 209         unsigned shift = panfrost_get_stack_shift(MAX2(batch->stack_size, 512));
 210
 211         /* TODO: where do we specify the shift? */
 212
 213         struct mali_single_framebuffer framebuffer = {
 214                 .width = MALI_POSITIVE(width),
 215                 .height = MALI_POSITIVE(height),
 216                 .unknown2 = 0x1f,
 217                 .format = {
 218                         .unk3 = 0x3,
 219                 },
 220                 .clear_flags = 0x1000,
 221                 .scratchpad = panfrost_batch_get_scratchpad(batch, shift, screen->thread_tls_alloc, screen->core_count)->gpu,
 222                 .tiler = panfrost_emit_midg_tiler(batch, vertex_count),
 223         };
 224
 225         return framebuffer;
 226 }
 227
 228 void
 229 panfrost_attach_sfbd(struct panfrost_batch *batch, unsigned vertex_count)
 230 {
 231         struct mali_single_framebuffer sfbd =
 232                 panfrost_emit_sfbd(batch, vertex_count);
 233
 234         memcpy(batch->framebuffer.cpu, &sfbd, sizeof(sfbd));
 235 }
 236
 237 /* Creates an SFBD for the FRAGMENT section of the bound framebuffer */
 238
 239 mali_ptr
 240 panfrost_sfbd_fragment(struct panfrost_batch *batch, bool has_draws)
 241 {
 242         struct mali_single_framebuffer fb = panfrost_emit_sfbd(batch, has_draws);
 243
 244         panfrost_sfbd_clear(batch, &fb);
 245
 246         /* SFBD does not support MRT natively; sanity check */
 247         assert(batch->key.nr_cbufs <= 1);
 248         if (batch->key.nr_cbufs) {
 249                 struct pipe_surface *surf = batch->key.cbufs[0];
 250                 struct panfrost_resource *rsrc = pan_resource(surf->texture);
 251                 struct panfrost_bo *bo = rsrc->bo;
 252
 253                 panfrost_sfbd_set_cbuf(&fb, surf);
 254
 255                 if (rsrc->checksummed) {
 256                         unsigned level = surf->u.tex.level;
 257                         struct panfrost_slice *slice = &rsrc->slices[level];
 258
 259                         fb.checksum_stride = slice->checksum_stride;
 260                         fb.checksum = bo->gpu + slice->checksum_offset;
 261                 }
 262         }
 263
 264         if (batch->key.zsbuf)
 265                 panfrost_sfbd_set_zsbuf(&fb, batch->key.zsbuf);
 266
 267         if (batch->requirements & PAN_REQ_MSAA) {
 268                 fb.format.unk1 |= MALI_SFBD_FORMAT_MSAA_A;
 269                 fb.format.unk2 |= MALI_SFBD_FORMAT_MSAA_B;
 270         }
 271
 272         return panfrost_upload_transient(batch, &fb, sizeof(fb));
 273 }