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/ralloc.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_blitter.h"
  32 #include "util/u_upload_mgr.h"
  33 #include "indices/u_primconvert.h"
  34 #include "pipe/p_screen.h"
  35
  36 #include "vc4_screen.h"
  37 #include "vc4_context.h"
  38 #include "vc4_resource.h"
  39
  40 void
  41 vc4_flush(struct pipe_context *pctx)
  42 {
  43         struct vc4_context *vc4 = vc4_context(pctx);
  44         struct pipe_surface *cbuf = vc4->framebuffer.cbufs[0];
  45         struct pipe_surface *zsbuf = vc4->framebuffer.zsbuf;
  46
  47         if (!vc4->needs_flush)
  48                 return;
  49
  50         /* The RCL setup would choke if the draw bounds cause no drawing, so
  51          * just drop the drawing if that's the case.
  52          */
  53         if (vc4->draw_max_x <= vc4->draw_min_x ||
  54             vc4->draw_max_y <= vc4->draw_min_y) {
  55                 vc4_job_reset(vc4);
  56                 return;
  57         }
  58
  59         /* Increment the semaphore indicating that binning is done and
  60          * unblocking the render thread.  Note that this doesn't act until the
  61          * FLUSH completes.
  62          */
  63         cl_ensure_space(&vc4->bcl, 8);
  64         struct vc4_cl_out *bcl = cl_start(&vc4->bcl);
  65         cl_u8(&bcl, VC4_PACKET_INCREMENT_SEMAPHORE);
  66         /* The FLUSH caps all of our bin lists with a VC4_PACKET_RETURN. */
  67         cl_u8(&bcl, VC4_PACKET_FLUSH);
  68         cl_end(&vc4->bcl, bcl);
  69
  70         if (cbuf && (vc4->resolve & PIPE_CLEAR_COLOR0)) {
  71                 pipe_surface_reference(&vc4->color_write,
  72                                        cbuf->texture->nr_samples > 1 ?
  73                                        NULL : cbuf);
  74                 pipe_surface_reference(&vc4->msaa_color_write,
  75                                        cbuf->texture->nr_samples > 1 ?
  76                                        cbuf : NULL);
  77
  78                 if (!(vc4->cleared & PIPE_CLEAR_COLOR0)) {
  79                         pipe_surface_reference(&vc4->color_read, cbuf);
  80                 } else {
  81                         pipe_surface_reference(&vc4->color_read, NULL);
  82                 }
  83
  84         } else {
  85                 pipe_surface_reference(&vc4->color_write, NULL);
  86                 pipe_surface_reference(&vc4->color_read, NULL);
  87                 pipe_surface_reference(&vc4->msaa_color_write, NULL);
  88         }
  89
  90         if (vc4->framebuffer.zsbuf &&
  91             (vc4->resolve & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
  92                 pipe_surface_reference(&vc4->zs_write,
  93                                        zsbuf->texture->nr_samples > 1 ?
  94                                        NULL : zsbuf);
  95                 pipe_surface_reference(&vc4->msaa_zs_write,
  96                                        zsbuf->texture->nr_samples > 1 ?
  97                                        zsbuf : NULL);
  98
  99                 if (!(vc4->cleared & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
 100                         pipe_surface_reference(&vc4->zs_read, zsbuf);
 101                 } else {
 102                         pipe_surface_reference(&vc4->zs_read, NULL);
 103                 }
 104         } else {
 105                 pipe_surface_reference(&vc4->zs_write, NULL);
 106                 pipe_surface_reference(&vc4->zs_read, NULL);
 107                 pipe_surface_reference(&vc4->msaa_zs_write, NULL);
 108         }
 109
 110         vc4_job_submit(vc4);
 111 }
 112
 113 static void
 114 vc4_pipe_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
 115                unsigned flags)
 116 {
 117         struct vc4_context *vc4 = vc4_context(pctx);
 118
 119         vc4_flush(pctx);
 120
 121         if (fence) {
 122                 struct pipe_screen *screen = pctx->screen;
 123                 struct vc4_fence *f = vc4_fence_create(vc4->screen,
 124                                                        vc4->last_emit_seqno);
 125                 screen->fence_reference(screen, fence, NULL);
 126                 *fence = (struct pipe_fence_handle *)f;
 127         }
 128 }
 129
 130 /**
 131  * Flushes the current command lists if they reference the given BO.
 132  *
 133  * This helps avoid flushing the command buffers when unnecessary.
 134  */
 135 bool
 136 vc4_cl_references_bo(struct pipe_context *pctx, struct vc4_bo *bo,
 137                      bool include_reads)
 138 {
 139         struct vc4_context *vc4 = vc4_context(pctx);
 140
 141         if (!vc4->needs_flush)
 142                 return false;
 143
 144         /* Walk all the referenced BOs in the drawing command list to see if
 145          * they match.
 146          */
 147         if (include_reads) {
 148                 struct vc4_bo **referenced_bos = vc4->bo_pointers.base;
 149                 for (int i = 0; i < cl_offset(&vc4->bo_handles) / 4; i++) {
 150                         if (referenced_bos[i] == bo) {
 151                                 return true;
 152                         }
 153                 }
 154         }
 155
 156         /* Also check for the Z/color buffers, since the references to those
 157          * are only added immediately before submit.
 158          */
 159         struct vc4_surface *csurf = vc4_surface(vc4->framebuffer.cbufs[0]);
 160         if (csurf) {
 161                 struct vc4_resource *ctex = vc4_resource(csurf->base.texture);
 162                 if (ctex->bo == bo) {
 163                         return true;
 164                 }
 165         }
 166
 167         struct vc4_surface *zsurf = vc4_surface(vc4->framebuffer.zsbuf);
 168         if (zsurf) {
 169                 struct vc4_resource *ztex =
 170                         vc4_resource(zsurf->base.texture);
 171                 if (ztex->bo == bo) {
 172                         return true;
 173                 }
 174         }
 175
 176         return false;
 177 }
 178
 179 static void
 180 vc4_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 181 {
 182         struct vc4_context *vc4 = vc4_context(pctx);
 183         struct pipe_surface *zsurf = vc4->framebuffer.zsbuf;
 184
 185         if (zsurf && zsurf->texture == prsc)
 186                 vc4->resolve &= ~(PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL);
 187 }
 188
 189 static void
 190 vc4_context_destroy(struct pipe_context *pctx)
 191 {
 192         struct vc4_context *vc4 = vc4_context(pctx);
 193
 194         if (vc4->blitter)
 195                 util_blitter_destroy(vc4->blitter);
 196
 197         if (vc4->primconvert)
 198                 util_primconvert_destroy(vc4->primconvert);
 199
 200         if (vc4->uploader)
 201                 u_upload_destroy(vc4->uploader);
 202
 203         slab_destroy(&vc4->transfer_pool);
 204
 205         pipe_surface_reference(&vc4->framebuffer.cbufs[0], NULL);
 206         pipe_surface_reference(&vc4->framebuffer.zsbuf, NULL);
 207
 208         pipe_surface_reference(&vc4->color_write, NULL);
 209         pipe_surface_reference(&vc4->color_read, NULL);
 210
 211         vc4_program_fini(pctx);
 212
 213         ralloc_free(vc4);
 214 }
 215
 216 struct pipe_context *
 217 vc4_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
 218 {
 219         struct vc4_screen *screen = vc4_screen(pscreen);
 220         struct vc4_context *vc4;
 221
 222         /* Prevent dumping of the shaders built during context setup. */
 223         uint32_t saved_shaderdb_flag = vc4_debug & VC4_DEBUG_SHADERDB;
 224         vc4_debug &= ~VC4_DEBUG_SHADERDB;
 225
 226         vc4 = rzalloc(NULL, struct vc4_context);
 227         if (!vc4)
 228                 return NULL;
 229         struct pipe_context *pctx = &vc4->base;
 230
 231         vc4->screen = screen;
 232
 233         pctx->screen = pscreen;
 234         pctx->priv = priv;
 235         pctx->destroy = vc4_context_destroy;
 236         pctx->flush = vc4_pipe_flush;
 237         pctx->invalidate_resource = vc4_invalidate_resource;
 238
 239         vc4_draw_init(pctx);
 240         vc4_state_init(pctx);
 241         vc4_program_init(pctx);
 242         vc4_query_init(pctx);
 243         vc4_resource_context_init(pctx);
 244
 245         vc4_job_init(vc4);
 246
 247         vc4->fd = screen->fd;
 248
 249         slab_create(&vc4->transfer_pool, sizeof(struct vc4_transfer),
 250                          16);
 251         vc4->blitter = util_blitter_create(pctx);
 252         if (!vc4->blitter)
 253                 goto fail;
 254
 255         vc4->primconvert = util_primconvert_create(pctx,
 256                                                    (1 << PIPE_PRIM_QUADS) - 1);
 257         if (!vc4->primconvert)
 258                 goto fail;
 259
 260         vc4->uploader = u_upload_create(pctx, 16 * 1024,
 261                                         PIPE_BIND_INDEX_BUFFER,
 262                                         PIPE_USAGE_STREAM);
 263
 264         vc4_debug |= saved_shaderdb_flag;
 265
 266         vc4->sample_mask = (1 << VC4_MAX_SAMPLES) - 1;
 267
 268         return &vc4->base;
 269
 270 fail:
 271         pctx->destroy(pctx);
 272         return NULL;
 273 }