src/gallium/drivers/vc4/vc4_context.c

   1 /*
   2  * Copyright © 2014 Broadcom
   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
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <xf86drm.h>
  25 #include <err.h>
  26
  27 #include "pipe/p_defines.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_blitter.h"
  31 #include "indices/u_primconvert.h"
  32 #include "pipe/p_screen.h"
  33
  34 #include "vc4_screen.h"
  35 #include "vc4_context.h"
  36 #include "vc4_resource.h"
  37
  38 static void
  39 vc4_setup_rcl(struct vc4_context *vc4)
  40 {
  41         struct vc4_surface *csurf = vc4_surface(vc4->framebuffer.cbufs[0]);
  42         struct vc4_resource *ctex = vc4_resource(csurf->base.texture);
  43         uint32_t resolve_uncleared = vc4->resolve & ~vc4->cleared;
  44         uint32_t width = vc4->framebuffer.width;
  45         uint32_t height = vc4->framebuffer.height;
  46         uint32_t xtiles = align(width, 64) / 64;
  47         uint32_t ytiles = align(height, 64) / 64;
  48
  49 #if 0
  50         fprintf(stderr, "RCL: resolve 0x%x clear 0x%x resolve uncleared 0x%x\n",
  51                 vc4->resolve,
  52                 vc4->cleared,
  53                 resolve_uncleared);
  54 #endif
  55
  56         cl_u8(&vc4->rcl, VC4_PACKET_CLEAR_COLORS);
  57         cl_u32(&vc4->rcl, vc4->clear_color[0]);
  58         cl_u32(&vc4->rcl, vc4->clear_color[1]);
  59         cl_u32(&vc4->rcl, vc4->clear_depth);
  60         cl_u8(&vc4->rcl, 0);
  61
  62         cl_start_reloc(&vc4->rcl, 1);
  63         cl_u8(&vc4->rcl, VC4_PACKET_TILE_RENDERING_MODE_CONFIG);
  64         cl_reloc(vc4, &vc4->rcl, ctex->bo, csurf->offset);
  65         cl_u16(&vc4->rcl, width);
  66         cl_u16(&vc4->rcl, height);
  67         cl_u16(&vc4->rcl, ((csurf->tiling <<
  68                             VC4_RENDER_CONFIG_MEMORY_FORMAT_SHIFT) |
  69                            (vc4_rt_format_is_565(csurf->base.format) ?
  70                             VC4_RENDER_CONFIG_FORMAT_BGR565 :
  71                             VC4_RENDER_CONFIG_FORMAT_RGBA8888) |
  72                            VC4_RENDER_CONFIG_EARLY_Z_COVERAGE_DISABLE));
  73
  74         /* The tile buffer normally gets cleared when the previous tile is
  75          * stored.  If the clear values changed between frames, then the tile
  76          * buffer has stale clear values in it, so we have to do a store in
  77          * None mode (no writes) so that we trigger the tile buffer clear.
  78          */
  79         if (vc4->cleared & PIPE_CLEAR_COLOR0) {
  80                 cl_u8(&vc4->rcl, VC4_PACKET_TILE_COORDINATES);
  81                 cl_u8(&vc4->rcl, 0);
  82                 cl_u8(&vc4->rcl, 0);
  83
  84                 cl_u8(&vc4->rcl, VC4_PACKET_STORE_TILE_BUFFER_GENERAL);
  85                 cl_u16(&vc4->rcl, VC4_LOADSTORE_TILE_BUFFER_NONE);
  86                 cl_u32(&vc4->rcl, 0); /* no address, since we're in None mode */
  87         }
  88
  89         for (int y = 0; y < ytiles; y++) {
  90                 for (int x = 0; x < xtiles; x++) {
  91                         bool end_of_frame = (x == xtiles - 1 &&
  92                                              y == ytiles - 1);
  93
  94                         /* Note that the load doesn't actually occur until the
  95                          * tile coords packet is processed.
  96                          */
  97                         if (resolve_uncleared & PIPE_CLEAR_COLOR) {
  98                                 cl_start_reloc(&vc4->rcl, 1);
  99                                 cl_u8(&vc4->rcl, VC4_PACKET_LOAD_TILE_BUFFER_GENERAL);
 100                                 cl_u8(&vc4->rcl,
 101                                       VC4_LOADSTORE_TILE_BUFFER_COLOR |
 102                                       (csurf->tiling <<
 103                                        VC4_LOADSTORE_TILE_BUFFER_FORMAT_SHIFT));
 104                                 cl_u8(&vc4->rcl,
 105                                       vc4_rt_format_is_565(csurf->base.format) ?
 106                                       VC4_LOADSTORE_TILE_BUFFER_BGR565 :
 107                                       VC4_LOADSTORE_TILE_BUFFER_RGBA8888);
 108                                 cl_reloc(vc4, &vc4->rcl, ctex->bo,
 109                                          csurf->offset);
 110                         }
 111
 112                         cl_u8(&vc4->rcl, VC4_PACKET_TILE_COORDINATES);
 113                         cl_u8(&vc4->rcl, x);
 114                         cl_u8(&vc4->rcl, y);
 115
 116                         cl_start_reloc(&vc4->rcl, 1);
 117                         cl_u8(&vc4->rcl, VC4_PACKET_BRANCH_TO_SUB_LIST);
 118                         cl_reloc(vc4, &vc4->rcl, vc4->tile_alloc,
 119                                  (y * xtiles + x) * 32);
 120
 121                         if (vc4->resolve & PIPE_CLEAR_COLOR0) {
 122                                 if (end_of_frame) {
 123                                         cl_u8(&vc4->rcl,
 124                                               VC4_PACKET_STORE_MS_TILE_BUFFER_AND_EOF);
 125                                 } else {
 126                                         cl_u8(&vc4->rcl,
 127                                               VC4_PACKET_STORE_MS_TILE_BUFFER);
 128                                 }
 129                         } else {
 130                                 assert(!"unfinished: Need to end the frame\n");
 131                         }
 132                 }
 133         }
 134 }
 135
 136 void
 137 vc4_flush(struct pipe_context *pctx)
 138 {
 139         struct vc4_context *vc4 = vc4_context(pctx);
 140
 141         if (!vc4->needs_flush)
 142                 return;
 143
 144         cl_u8(&vc4->bcl, VC4_PACKET_FLUSH_ALL);
 145         cl_u8(&vc4->bcl, VC4_PACKET_NOP);
 146         cl_u8(&vc4->bcl, VC4_PACKET_HALT);
 147
 148         vc4_setup_rcl(vc4);
 149
 150         struct drm_vc4_submit_cl submit;
 151         memset(&submit, 0, sizeof(submit));
 152
 153         submit.bo_handles = vc4->bo_handles.base;
 154         submit.bo_handle_count = (vc4->bo_handles.next -
 155                                   vc4->bo_handles.base) / 4;
 156         submit.bin_cl = vc4->bcl.base;
 157         submit.bin_cl_size = vc4->bcl.next - vc4->bcl.base;
 158         submit.render_cl = vc4->rcl.base;
 159         submit.render_cl_size = vc4->rcl.next - vc4->rcl.base;
 160         submit.shader_rec = vc4->shader_rec.base;
 161         submit.shader_rec_size = vc4->shader_rec.next - vc4->shader_rec.base;
 162         submit.shader_rec_count = vc4->shader_rec_count;
 163         submit.uniforms = vc4->uniforms.base;
 164         submit.uniforms_size = vc4->uniforms.next - vc4->uniforms.base;
 165
 166         if (!(vc4_debug & VC4_DEBUG_NORAST)) {
 167                 int ret;
 168
 169 #ifndef USE_VC4_SIMULATOR
 170                 ret = drmIoctl(vc4->fd, DRM_IOCTL_VC4_SUBMIT_CL, &submit);
 171 #else
 172                 ret = vc4_simulator_flush(vc4, &submit);
 173 #endif
 174                 if (ret)
 175                         errx(1, "VC4 submit failed\n");
 176         }
 177
 178         vc4_reset_cl(&vc4->bcl);
 179         vc4_reset_cl(&vc4->rcl);
 180         vc4_reset_cl(&vc4->shader_rec);
 181         vc4_reset_cl(&vc4->uniforms);
 182         vc4_reset_cl(&vc4->bo_handles);
 183         struct vc4_bo **referenced_bos = vc4->bo_pointers.base;
 184         for (int i = 0; i < submit.bo_handle_count; i++)
 185                 vc4_bo_unreference(&referenced_bos[i]);
 186         vc4_reset_cl(&vc4->bo_pointers);
 187         vc4->shader_rec_count = 0;
 188
 189         vc4->needs_flush = false;
 190         vc4->draw_call_queued = false;
 191         vc4->dirty = ~0;
 192         vc4->resolve = 0;
 193         vc4->cleared = 0;
 194 }
 195
 196 static void
 197 vc4_pipe_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
 198                unsigned flags)
 199 {
 200         vc4_flush(pctx);
 201 }
 202
 203 /**
 204  * Flushes the current command lists if they reference the given BO.
 205  *
 206  * This helps avoid flushing the command buffers when unnecessary.
 207  */
 208 void
 209 vc4_flush_for_bo(struct pipe_context *pctx, struct vc4_bo *bo)
 210 {
 211         struct vc4_context *vc4 = vc4_context(pctx);
 212
 213         if (!vc4->needs_flush)
 214                 return;
 215
 216         /* Walk all the referenced BOs in the drawing command list to see if
 217          * they match.
 218          */
 219         struct vc4_bo **referenced_bos = vc4->bo_pointers.base;
 220         for (int i = 0; i < (vc4->bo_handles.next -
 221                              vc4->bo_handles.base) / 4; i++) {
 222                 if (referenced_bos[i] == bo) {
 223                         vc4_flush(pctx);
 224                         return;
 225                 }
 226         }
 227
 228         /* Also check for the Z/color buffers, since the references to those
 229          * are only added immediately before submit.
 230          */
 231         struct vc4_surface *csurf = vc4_surface(vc4->framebuffer.cbufs[0]);
 232         if (csurf) {
 233                 struct vc4_resource *ctex = vc4_resource(csurf->base.texture);
 234                 if (ctex->bo == bo) {
 235                         vc4_flush(pctx);
 236                         return;
 237                 }
 238         }
 239
 240         struct vc4_surface *zsurf = vc4_surface(vc4->framebuffer.zsbuf);
 241         if (zsurf) {
 242                 struct vc4_resource *ztex =
 243                         vc4_resource(zsurf->base.texture);
 244                 if (ztex->bo == bo) {
 245                         vc4_flush(pctx);
 246                         return;
 247                 }
 248         }
 249 }
 250
 251 static void
 252 vc4_context_destroy(struct pipe_context *pctx)
 253 {
 254         struct vc4_context *vc4 = vc4_context(pctx);
 255
 256         if (vc4->blitter)
 257                 util_blitter_destroy(vc4->blitter);
 258
 259         if (vc4->primconvert)
 260                 util_primconvert_destroy(vc4->primconvert);
 261
 262         util_slab_destroy(&vc4->transfer_pool);
 263
 264         free(vc4);
 265 }
 266
 267 struct pipe_context *
 268 vc4_context_create(struct pipe_screen *pscreen, void *priv)
 269 {
 270         struct vc4_screen *screen = vc4_screen(pscreen);
 271         struct vc4_context *vc4;
 272
 273         /* Prevent dumping of the shaders built during context setup. */
 274         uint32_t saved_shaderdb_flag = vc4_debug & VC4_DEBUG_SHADERDB;
 275         vc4_debug &= ~VC4_DEBUG_SHADERDB;
 276
 277         vc4 = CALLOC_STRUCT(vc4_context);
 278         if (vc4 == NULL)
 279                 return NULL;
 280         struct pipe_context *pctx = &vc4->base;
 281
 282         vc4->screen = screen;
 283
 284         pctx->screen = pscreen;
 285         pctx->priv = priv;
 286         pctx->destroy = vc4_context_destroy;
 287         pctx->flush = vc4_pipe_flush;
 288
 289         vc4_draw_init(pctx);
 290         vc4_state_init(pctx);
 291         vc4_program_init(pctx);
 292         vc4_resource_context_init(pctx);
 293
 294         vc4_init_cl(vc4, &vc4->bcl);
 295         vc4_init_cl(vc4, &vc4->rcl);
 296         vc4_init_cl(vc4, &vc4->shader_rec);
 297         vc4_init_cl(vc4, &vc4->bo_handles);
 298
 299         vc4->dirty = ~0;
 300         vc4->fd = screen->fd;
 301
 302         util_slab_create(&vc4->transfer_pool, sizeof(struct vc4_transfer),
 303                          16, UTIL_SLAB_SINGLETHREADED);
 304         vc4->blitter = util_blitter_create(pctx);
 305         if (!vc4->blitter)
 306                 goto fail;
 307
 308         vc4->primconvert = util_primconvert_create(pctx,
 309                                                    (1 << PIPE_PRIM_QUADS) - 1);
 310         if (!vc4->primconvert)
 311                 goto fail;
 312
 313         vc4_debug |= saved_shaderdb_flag;
 314
 315         return &vc4->base;
 316
 317 fail:
 318         pctx->destroy(pctx);
 319         return NULL;
 320 }