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         cl_u8(&vc4->bcl, VC4_PACKET_INCREMENT_SEMAPHORE);
  65         /* The FLUSH caps all of our bin lists with a VC4_PACKET_RETURN. */
  66         cl_u8(&vc4->bcl, VC4_PACKET_FLUSH);
  67
  68         if (cbuf && (vc4->resolve & PIPE_CLEAR_COLOR0)) {
  69                 pipe_surface_reference(&vc4->color_write, cbuf);
  70                 if (!(vc4->cleared & PIPE_CLEAR_COLOR0)) {
  71                         pipe_surface_reference(&vc4->color_read, cbuf);
  72                 } else {
  73                         pipe_surface_reference(&vc4->color_read, NULL);
  74                 }
  75
  76         } else {
  77                 pipe_surface_reference(&vc4->color_write, NULL);
  78                 pipe_surface_reference(&vc4->color_read, NULL);
  79         }
  80
  81         if (vc4->framebuffer.zsbuf &&
  82             (vc4->resolve & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
  83                 pipe_surface_reference(&vc4->zs_write, zsbuf);
  84                 if (!(vc4->cleared & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL))) {
  85                         pipe_surface_reference(&vc4->zs_read, zsbuf);
  86                 } else {
  87                         pipe_surface_reference(&vc4->zs_read, NULL);
  88                 }
  89         } else {
  90                 pipe_surface_reference(&vc4->zs_write, NULL);
  91                 pipe_surface_reference(&vc4->zs_read, NULL);
  92         }
  93
  94         vc4_job_submit(vc4);
  95 }
  96
  97 static void
  98 vc4_pipe_flush(struct pipe_context *pctx, struct pipe_fence_handle **fence,
  99                unsigned flags)
 100 {
 101         struct vc4_context *vc4 = vc4_context(pctx);
 102
 103         vc4_flush(pctx);
 104
 105         if (fence) {
 106                 struct pipe_screen *screen = pctx->screen;
 107                 struct vc4_fence *f = vc4_fence_create(vc4->screen,
 108                                                        vc4->last_emit_seqno);
 109                 screen->fence_reference(screen, fence, NULL);
 110                 *fence = (struct pipe_fence_handle *)f;
 111         }
 112 }
 113
 114 /**
 115  * Flushes the current command lists if they reference the given BO.
 116  *
 117  * This helps avoid flushing the command buffers when unnecessary.
 118  */
 119 bool
 120 vc4_cl_references_bo(struct pipe_context *pctx, struct vc4_bo *bo)
 121 {
 122         struct vc4_context *vc4 = vc4_context(pctx);
 123
 124         if (!vc4->needs_flush)
 125                 return false;
 126
 127         /* Walk all the referenced BOs in the drawing command list to see if
 128          * they match.
 129          */
 130         struct vc4_bo **referenced_bos = vc4->bo_pointers.base;
 131         for (int i = 0; i < cl_offset(&vc4->bo_handles) / 4; i++) {
 132                 if (referenced_bos[i] == bo) {
 133                         return true;
 134                 }
 135         }
 136
 137         /* Also check for the Z/color buffers, since the references to those
 138          * are only added immediately before submit.
 139          */
 140         struct vc4_surface *csurf = vc4_surface(vc4->framebuffer.cbufs[0]);
 141         if (csurf) {
 142                 struct vc4_resource *ctex = vc4_resource(csurf->base.texture);
 143                 if (ctex->bo == bo) {
 144                         return true;
 145                 }
 146         }
 147
 148         struct vc4_surface *zsurf = vc4_surface(vc4->framebuffer.zsbuf);
 149         if (zsurf) {
 150                 struct vc4_resource *ztex =
 151                         vc4_resource(zsurf->base.texture);
 152                 if (ztex->bo == bo) {
 153                         return true;
 154                 }
 155         }
 156
 157         return false;
 158 }
 159
 160 static void
 161 vc4_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 162 {
 163         struct vc4_context *vc4 = vc4_context(pctx);
 164         struct pipe_surface *zsurf = vc4->framebuffer.zsbuf;
 165
 166         if (zsurf && zsurf->texture == prsc)
 167                 vc4->resolve &= ~(PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL);
 168 }
 169
 170 static void
 171 vc4_context_destroy(struct pipe_context *pctx)
 172 {
 173         struct vc4_context *vc4 = vc4_context(pctx);
 174
 175         if (vc4->blitter)
 176                 util_blitter_destroy(vc4->blitter);
 177
 178         if (vc4->primconvert)
 179                 util_primconvert_destroy(vc4->primconvert);
 180
 181         if (vc4->uploader)
 182                 u_upload_destroy(vc4->uploader);
 183
 184         util_slab_destroy(&vc4->transfer_pool);
 185
 186         pipe_surface_reference(&vc4->framebuffer.cbufs[0], NULL);
 187         pipe_surface_reference(&vc4->framebuffer.zsbuf, NULL);
 188
 189         vc4_program_fini(pctx);
 190
 191         ralloc_free(vc4);
 192 }
 193
 194 struct pipe_context *
 195 vc4_context_create(struct pipe_screen *pscreen, void *priv)
 196 {
 197         struct vc4_screen *screen = vc4_screen(pscreen);
 198         struct vc4_context *vc4;
 199
 200         /* Prevent dumping of the shaders built during context setup. */
 201         uint32_t saved_shaderdb_flag = vc4_debug & VC4_DEBUG_SHADERDB;
 202         vc4_debug &= ~VC4_DEBUG_SHADERDB;
 203
 204         vc4 = rzalloc(NULL, struct vc4_context);
 205         if (vc4 == NULL)
 206                 return NULL;
 207         struct pipe_context *pctx = &vc4->base;
 208
 209         vc4->screen = screen;
 210
 211         pctx->screen = pscreen;
 212         pctx->priv = priv;
 213         pctx->destroy = vc4_context_destroy;
 214         pctx->flush = vc4_pipe_flush;
 215         pctx->invalidate_resource = vc4_invalidate_resource;
 216
 217         vc4_draw_init(pctx);
 218         vc4_state_init(pctx);
 219         vc4_program_init(pctx);
 220         vc4_query_init(pctx);
 221         vc4_resource_context_init(pctx);
 222
 223         vc4_job_init(vc4);
 224
 225         vc4->fd = screen->fd;
 226
 227         util_slab_create(&vc4->transfer_pool, sizeof(struct vc4_transfer),
 228                          16, UTIL_SLAB_SINGLETHREADED);
 229         vc4->blitter = util_blitter_create(pctx);
 230         if (!vc4->blitter)
 231                 goto fail;
 232
 233         vc4->primconvert = util_primconvert_create(pctx,
 234                                                    (1 << PIPE_PRIM_QUADS) - 1);
 235         if (!vc4->primconvert)
 236                 goto fail;
 237
 238         vc4->uploader = u_upload_create(pctx, 16 * 1024, 4,
 239                                         PIPE_BIND_INDEX_BUFFER);
 240
 241         vc4_debug |= saved_shaderdb_flag;
 242
 243         return &vc4->base;
 244
 245 fail:
 246         pctx->destroy(pctx);
 247         return NULL;
 248 }