src/gallium/drivers/nouveau/nv30/nv30_fragprog.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   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 shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Ben Skeggs
  23  *
  24  */
  25
  26 #include "draw/draw_context.h"
  27 #include "tgsi/tgsi_parse.h"
  28
  29 #include "nv_object.xml.h"
  30 #include "nv30/nv30-40_3d.xml.h"
  31 #include "nv30/nv30_context.h"
  32 #include "nv30/nvfx_shader.h"
  33
  34 static void
  35 nv30_fragprog_upload(struct nv30_context *nv30)
  36 {
  37    struct nouveau_context *nv = &nv30->base;
  38    struct nv30_fragprog *fp = nv30->fragprog.program;
  39    struct pipe_context *pipe = &nv30->base.pipe;
  40
  41    if (unlikely(!fp->buffer))
  42       fp->buffer = pipe_buffer_create(pipe->screen, 0, 0, fp->insn_len * 4);
  43
  44 #if !PIPE_ARCH_BIG_ENDIAN
  45    pipe_buffer_write(pipe, fp->buffer, 0, fp->insn_len * 4, fp->insn);
  46 #else
  47    {
  48       struct pipe_transfer *transfer;
  49       uint32_t *map;
  50       int i;
  51
  52       map = pipe_buffer_map(pipe, fp->buffer,
  53                             PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE,
  54                             &transfer);
  55       for (i = 0; i < fp->insn_len; i++)
  56          *map++ = (fp->insn[i] >> 16) | (fp->insn[i] << 16);
  57       pipe_buffer_unmap(pipe, transfer);
  58    }
  59 #endif
  60
  61    if (nv04_resource(fp->buffer)->domain != NOUVEAU_BO_VRAM)
  62       nouveau_buffer_migrate(nv, nv04_resource(fp->buffer), NOUVEAU_BO_VRAM);
  63 }
  64
  65 void
  66 nv30_fragprog_validate(struct nv30_context *nv30)
  67 {
  68    struct nouveau_pushbuf *push = nv30->base.pushbuf;
  69    struct nouveau_object *eng3d = nv30->screen->eng3d;
  70    struct nv30_fragprog *fp = nv30->fragprog.program;
  71    bool upload = false;
  72    int i;
  73
  74    if (!fp->translated) {
  75       _nvfx_fragprog_translate(eng3d->oclass, fp);
  76       if (!fp->translated)
  77          return;
  78
  79       upload = true;
  80    }
  81
  82    /* update constants, also needs to be done on every fp switch as we
  83     * have no idea whether the constbuf changed in the meantime
  84     */
  85    if (nv30->fragprog.constbuf) {
  86       struct pipe_resource *constbuf = nv30->fragprog.constbuf;
  87       uint32_t *cbuf = (uint32_t *)nv04_resource(constbuf)->data;
  88
  89       for (i = 0; i < fp->nr_consts; i++) {
  90          unsigned off = fp->consts[i].offset;
  91          unsigned idx = fp->consts[i].index * 4;
  92
  93          if (!memcmp(&fp->insn[off], &cbuf[idx], 4 * 4))
  94             continue;
  95          memcpy(&fp->insn[off], &cbuf[idx], 4 * 4);
  96          upload = true;
  97       }
  98    }
  99
 100    if (upload)
 101       nv30_fragprog_upload(nv30);
 102
 103    /* FP_ACTIVE_PROGRAM needs to be done again even if only the consts
 104     * were updated.  TEX_CACHE_CTL magic is not enough to convince the
 105     * GPU that it should re-read the fragprog from VRAM... sigh.
 106     */
 107    if (nv30->state.fragprog != fp || upload) {
 108       struct nv04_resource *r = nv04_resource(fp->buffer);
 109
 110       if (!PUSH_SPACE(push, 8))
 111          return;
 112       PUSH_RESET(push, BUFCTX_FRAGPROG);
 113
 114       BEGIN_NV04(push, NV30_3D(FP_ACTIVE_PROGRAM), 1);
 115       PUSH_RESRC(push, NV30_3D(FP_ACTIVE_PROGRAM), BUFCTX_FRAGPROG, r, 0,
 116                        NOUVEAU_BO_LOW | NOUVEAU_BO_RD | NOUVEAU_BO_OR,
 117                        NV30_3D_FP_ACTIVE_PROGRAM_DMA0,
 118                        NV30_3D_FP_ACTIVE_PROGRAM_DMA1);
 119       BEGIN_NV04(push, NV30_3D(FP_CONTROL), 1);
 120       PUSH_DATA (push, fp->fp_control);
 121       if (eng3d->oclass < NV40_3D_CLASS) {
 122          BEGIN_NV04(push, NV30_3D(FP_REG_CONTROL), 1);
 123          PUSH_DATA (push, 0x00010004);
 124          BEGIN_NV04(push, NV30_3D(TEX_UNITS_ENABLE), 1);
 125          PUSH_DATA (push, fp->texcoords);
 126       } else {
 127          BEGIN_NV04(push, SUBC_3D(0x0b40), 1);
 128          PUSH_DATA (push, 0x00000000);
 129       }
 130
 131       nv30->state.fragprog = fp;
 132    }
 133 }
 134
 135 static void *
 136 nv30_fp_state_create(struct pipe_context *pipe,
 137                      const struct pipe_shader_state *cso)
 138 {
 139    struct nv30_fragprog *fp = CALLOC_STRUCT(nv30_fragprog);
 140    if (!fp)
 141       return NULL;
 142
 143    fp->pipe.tokens = tgsi_dup_tokens(cso->tokens);
 144    tgsi_scan_shader(fp->pipe.tokens, &fp->info);
 145    return fp;
 146 }
 147
 148 static void
 149 nv30_fp_state_delete(struct pipe_context *pipe, void *hwcso)
 150 {
 151    struct nv30_fragprog *fp = hwcso;
 152
 153    pipe_resource_reference(&fp->buffer, NULL);
 154
 155    if (fp->draw)
 156       draw_delete_fragment_shader(nv30_context(pipe)->draw, fp->draw);
 157
 158    FREE((void *)fp->pipe.tokens);
 159    FREE(fp->insn);
 160    FREE(fp->consts);
 161    FREE(fp);
 162 }
 163
 164 static void
 165 nv30_fp_state_bind(struct pipe_context *pipe, void *hwcso)
 166 {
 167    struct nv30_context *nv30 = nv30_context(pipe);
 168    struct nv30_fragprog *fp = hwcso;
 169
 170    /* reset the bucftx so that we don't keep a dangling reference to the fp
 171     * code
 172     */
 173    if (fp != nv30->state.fragprog)
 174       nouveau_bufctx_reset(nv30->bufctx, BUFCTX_FRAGPROG);
 175
 176    nv30->fragprog.program = fp;
 177    nv30->dirty |= NV30_NEW_FRAGPROG;
 178 }
 179
 180 void
 181 nv30_fragprog_init(struct pipe_context *pipe)
 182 {
 183    pipe->create_fs_state = nv30_fp_state_create;
 184    pipe->bind_fs_state = nv30_fp_state_bind;
 185    pipe->delete_fs_state = nv30_fp_state_delete;
 186 }