summaryrefslogtreecommitdiffstats
path: root/src/gallium/drivers/i965/brw_curbe.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/gallium/drivers/i965/brw_curbe.c')
-rw-r--r--src/gallium/drivers/i965/brw_curbe.c376
1 files changed, 376 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_curbe.c b/src/gallium/drivers/i965/brw_curbe.c
new file mode 100644
index 00000000000..4be6c77aa1e
--- /dev/null
+++ b/src/gallium/drivers/i965/brw_curbe.c
@@ -0,0 +1,376 @@
+/*
+ Copyright (C) Intel Corp. 2006. All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
+ develop this 3D driver.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice (including the
+ next paragraph) shall be included in all copies or substantial
+ portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+ **********************************************************************/
+ /*
+ * Authors:
+ * Keith Whitwell <[email protected]>
+ */
+
+
+
+#include "main/glheader.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/enums.h"
+#include "shader/prog_parameter.h"
+#include "shader/prog_print.h"
+#include "shader/prog_statevars.h"
+#include "intel_batchbuffer.h"
+#include "intel_regions.h"
+#include "brw_context.h"
+#include "brw_defines.h"
+#include "brw_state.h"
+#include "brw_util.h"
+
+
+/**
+ * Partition the CURBE between the various users of constant values:
+ * Note that vertex and fragment shaders can now fetch constants out
+ * of constant buffers. We no longer allocatea block of the GRF for
+ * constants. That greatly reduces the demand for space in the CURBE.
+ * Some of the comments within are dated...
+ */
+static void calculate_curbe_offsets( struct brw_context *brw )
+{
+ GLcontext *ctx = &brw->intel.ctx;
+ /* CACHE_NEW_WM_PROG */
+ const GLuint nr_fp_regs = (brw->wm.prog_data->nr_params + 15) / 16;
+
+ /* BRW_NEW_VERTEX_PROGRAM */
+ const GLuint nr_vp_regs = (brw->vs.prog_data->nr_params + 15) / 16;
+ GLuint nr_clip_regs = 0;
+ GLuint total_regs;
+
+ /* _NEW_TRANSFORM */
+ if (ctx->Transform.ClipPlanesEnabled) {
+ GLuint nr_planes = 6 + brw_count_bits(ctx->Transform.ClipPlanesEnabled);
+ nr_clip_regs = (nr_planes * 4 + 15) / 16;
+ }
+
+
+ total_regs = nr_fp_regs + nr_vp_regs + nr_clip_regs;
+
+ /* This can happen - what to do? Probably rather than falling
+ * back, the best thing to do is emit programs which code the
+ * constants as immediate values. Could do this either as a static
+ * cap on WM and VS, or adaptively.
+ *
+ * Unfortunately, this is currently dependent on the results of the
+ * program generation process (in the case of wm), so this would
+ * introduce the need to re-generate programs in the event of a
+ * curbe allocation failure.
+ */
+ /* Max size is 32 - just large enough to
+ * hold the 128 parameters allowed by
+ * the fragment and vertex program
+ * api's. It's not clear what happens
+ * when both VP and FP want to use 128
+ * parameters, though.
+ */
+ assert(total_regs <= 32);
+
+ /* Lazy resize:
+ */
+ if (nr_fp_regs > brw->curbe.wm_size ||
+ nr_vp_regs > brw->curbe.vs_size ||
+ nr_clip_regs != brw->curbe.clip_size ||
+ (total_regs < brw->curbe.total_size / 4 &&
+ brw->curbe.total_size > 16)) {
+
+ GLuint reg = 0;
+
+ /* Calculate a new layout:
+ */
+ reg = 0;
+ brw->curbe.wm_start = reg;
+ brw->curbe.wm_size = nr_fp_regs; reg += nr_fp_regs;
+ brw->curbe.clip_start = reg;
+ brw->curbe.clip_size = nr_clip_regs; reg += nr_clip_regs;
+ brw->curbe.vs_start = reg;
+ brw->curbe.vs_size = nr_vp_regs; reg += nr_vp_regs;
+ brw->curbe.total_size = reg;
+
+ if (0)
+ _mesa_printf("curbe wm %d+%d clip %d+%d vs %d+%d\n",
+ brw->curbe.wm_start,
+ brw->curbe.wm_size,
+ brw->curbe.clip_start,
+ brw->curbe.clip_size,
+ brw->curbe.vs_start,
+ brw->curbe.vs_size );
+
+ brw->state.dirty.brw |= BRW_NEW_CURBE_OFFSETS;
+ }
+}
+
+
+const struct brw_tracked_state brw_curbe_offsets = {
+ .dirty = {
+ .mesa = _NEW_TRANSFORM,
+ .brw = BRW_NEW_VERTEX_PROGRAM,
+ .cache = CACHE_NEW_WM_PROG
+ },
+ .prepare = calculate_curbe_offsets
+};
+
+
+
+
+/* Define the number of curbes within CS's urb allocation. Multiple
+ * urb entries -> multiple curbes. These will be used by
+ * fixed-function hardware in a double-buffering scheme to avoid a
+ * pipeline stall each time the contents of the curbe is changed.
+ */
+void brw_upload_cs_urb_state(struct brw_context *brw)
+{
+ struct brw_cs_urb_state cs_urb;
+ memset(&cs_urb, 0, sizeof(cs_urb));
+
+ /* It appears that this is the state packet for the CS unit, ie. the
+ * urb entries detailed here are housed in the CS range from the
+ * URB_FENCE command.
+ */
+ cs_urb.header.opcode = CMD_CS_URB_STATE;
+ cs_urb.header.length = sizeof(cs_urb)/4 - 2;
+
+ /* BRW_NEW_URB_FENCE */
+ cs_urb.bits0.nr_urb_entries = brw->urb.nr_cs_entries;
+ cs_urb.bits0.urb_entry_size = brw->urb.csize - 1;
+
+ assert(brw->urb.nr_cs_entries);
+ BRW_CACHED_BATCH_STRUCT(brw, &cs_urb);
+}
+
+static GLfloat fixed_plane[6][4] = {
+ { 0, 0, -1, 1 },
+ { 0, 0, 1, 1 },
+ { 0, -1, 0, 1 },
+ { 0, 1, 0, 1 },
+ {-1, 0, 0, 1 },
+ { 1, 0, 0, 1 }
+};
+
+/* Upload a new set of constants. Too much variability to go into the
+ * cache mechanism, but maybe would benefit from a comparison against
+ * the current uploaded set of constants.
+ */
+static void prepare_constant_buffer(struct brw_context *brw)
+{
+ GLcontext *ctx = &brw->intel.ctx;
+ const struct brw_vertex_program *vp =
+ brw_vertex_program_const(brw->vertex_program);
+ const struct brw_fragment_program *fp =
+ brw_fragment_program_const(brw->fragment_program);
+ const GLuint sz = brw->curbe.total_size;
+ const GLuint bufsz = sz * 16 * sizeof(GLfloat);
+ GLfloat *buf;
+ GLuint i;
+
+ if (sz == 0) {
+ if (brw->curbe.last_buf) {
+ free(brw->curbe.last_buf);
+ brw->curbe.last_buf = NULL;
+ brw->curbe.last_bufsz = 0;
+ }
+ return;
+ }
+
+ buf = (GLfloat *) _mesa_calloc(bufsz);
+
+ /* fragment shader constants */
+ if (brw->curbe.wm_size) {
+ GLuint offset = brw->curbe.wm_start * 16;
+
+ _mesa_load_state_parameters(ctx, fp->program.Base.Parameters);
+
+ /* copy float constants */
+ for (i = 0; i < brw->wm.prog_data->nr_params; i++)
+ buf[offset + i] = *brw->wm.prog_data->param[i];
+ }
+
+
+ /* The clipplanes are actually delivered to both CLIP and VS units.
+ * VS uses them to calculate the outcode bitmasks.
+ */
+ if (brw->curbe.clip_size) {
+ GLuint offset = brw->curbe.clip_start * 16;
+ GLuint j;
+
+ /* If any planes are going this way, send them all this way:
+ */
+ for (i = 0; i < 6; i++) {
+ buf[offset + i * 4 + 0] = fixed_plane[i][0];
+ buf[offset + i * 4 + 1] = fixed_plane[i][1];
+ buf[offset + i * 4 + 2] = fixed_plane[i][2];
+ buf[offset + i * 4 + 3] = fixed_plane[i][3];
+ }
+
+ /* Clip planes: _NEW_TRANSFORM plus _NEW_PROJECTION to get to
+ * clip-space:
+ */
+ assert(MAX_CLIP_PLANES == 6);
+ for (j = 0; j < MAX_CLIP_PLANES; j++) {
+ if (ctx->Transform.ClipPlanesEnabled & (1<<j)) {
+ buf[offset + i * 4 + 0] = ctx->Transform._ClipUserPlane[j][0];
+ buf[offset + i * 4 + 1] = ctx->Transform._ClipUserPlane[j][1];
+ buf[offset + i * 4 + 2] = ctx->Transform._ClipUserPlane[j][2];
+ buf[offset + i * 4 + 3] = ctx->Transform._ClipUserPlane[j][3];
+ i++;
+ }
+ }
+ }
+
+ /* vertex shader constants */
+ if (brw->curbe.vs_size) {
+ GLuint offset = brw->curbe.vs_start * 16;
+ GLuint nr = brw->vs.prog_data->nr_params / 4;
+
+ if (brw->vertex_program->IsNVProgram)
+ _mesa_load_tracked_matrices(ctx);
+
+ /* Updates the ParamaterValues[i] pointers for all parameters of the
+ * basic type of PROGRAM_STATE_VAR.
+ */
+ _mesa_load_state_parameters(ctx, vp->program.Base.Parameters);
+
+ /* XXX just use a memcpy here */
+ for (i = 0; i < nr; i++) {
+ const GLfloat *value = vp->program.Base.Parameters->ParameterValues[i];
+ buf[offset + i * 4 + 0] = value[0];
+ buf[offset + i * 4 + 1] = value[1];
+ buf[offset + i * 4 + 2] = value[2];
+ buf[offset + i * 4 + 3] = value[3];
+ }
+ }
+
+ if (0) {
+ for (i = 0; i < sz*16; i+=4)
+ _mesa_printf("curbe %d.%d: %f %f %f %f\n", i/8, i&4,
+ buf[i+0], buf[i+1], buf[i+2], buf[i+3]);
+
+ _mesa_printf("last_buf %p buf %p sz %d/%d cmp %d\n",
+ brw->curbe.last_buf, buf,
+ bufsz, brw->curbe.last_bufsz,
+ brw->curbe.last_buf ? memcmp(buf, brw->curbe.last_buf, bufsz) : -1);
+ }
+
+ if (brw->curbe.curbe_bo != NULL &&
+ brw->curbe.last_buf &&
+ bufsz == brw->curbe.last_bufsz &&
+ memcmp(buf, brw->curbe.last_buf, bufsz) == 0) {
+ /* constants have not changed */
+ _mesa_free(buf);
+ }
+ else {
+ /* constants have changed */
+ if (brw->curbe.last_buf)
+ _mesa_free(brw->curbe.last_buf);
+
+ brw->curbe.last_buf = buf;
+ brw->curbe.last_bufsz = bufsz;
+
+ if (brw->curbe.curbe_bo != NULL &&
+ (brw->curbe.need_new_bo ||
+ brw->curbe.curbe_next_offset + bufsz > brw->curbe.curbe_bo->size))
+ {
+ dri_bo_unreference(brw->curbe.curbe_bo);
+ brw->curbe.curbe_bo = NULL;
+ }
+
+ if (brw->curbe.curbe_bo == NULL) {
+ /* Allocate a single page for CURBE entries for this batchbuffer.
+ * They're generally around 64b.
+ */
+ brw->curbe.curbe_bo = dri_bo_alloc(brw->intel.bufmgr, "CURBE",
+ 4096, 1 << 6);
+ brw->curbe.curbe_next_offset = 0;
+ }
+
+ brw->curbe.curbe_offset = brw->curbe.curbe_next_offset;
+ brw->curbe.curbe_next_offset += bufsz;
+ brw->curbe.curbe_next_offset = ALIGN(brw->curbe.curbe_next_offset, 64);
+
+ /* Copy data to the buffer:
+ */
+ dri_bo_subdata(brw->curbe.curbe_bo, brw->curbe.curbe_offset, bufsz, buf);
+ }
+
+ brw_add_validated_bo(brw, brw->curbe.curbe_bo);
+
+ /* Because this provokes an action (ie copy the constants into the
+ * URB), it shouldn't be shortcircuited if identical to the
+ * previous time - because eg. the urb destination may have
+ * changed, or the urb contents different to last time.
+ *
+ * Note that the data referred to is actually copied internally,
+ * not just used in place according to passed pointer.
+ *
+ * It appears that the CS unit takes care of using each available
+ * URB entry (Const URB Entry == CURBE) in turn, and issuing
+ * flushes as necessary when doublebuffering of CURBEs isn't
+ * possible.
+ */
+}
+
+static void emit_constant_buffer(struct brw_context *brw)
+{
+ struct intel_context *intel = &brw->intel;
+ GLuint sz = brw->curbe.total_size;
+
+ BEGIN_BATCH(2, IGNORE_CLIPRECTS);
+ if (sz == 0) {
+ OUT_BATCH((CMD_CONST_BUFFER << 16) | (2 - 2));
+ OUT_BATCH(0);
+ } else {
+ OUT_BATCH((CMD_CONST_BUFFER << 16) | (1 << 8) | (2 - 2));
+ OUT_RELOC(brw->curbe.curbe_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, 0,
+ (sz - 1) + brw->curbe.curbe_offset);
+ }
+ ADVANCE_BATCH();
+}
+
+/* This tracked state is unique in that the state it monitors varies
+ * dynamically depending on the parameters tracked by the fragment and
+ * vertex programs. This is the template used as a starting point,
+ * each context will maintain a copy of this internally and update as
+ * required.
+ */
+const struct brw_tracked_state brw_constant_buffer = {
+ .dirty = {
+ .mesa = _NEW_PROGRAM_CONSTANTS,
+ .brw = (BRW_NEW_FRAGMENT_PROGRAM |
+ BRW_NEW_VERTEX_PROGRAM |
+ BRW_NEW_URB_FENCE | /* Implicit - hardware requires this, not used above */
+ BRW_NEW_PSP | /* Implicit - hardware requires this, not used above */
+ BRW_NEW_CURBE_OFFSETS |
+ BRW_NEW_BATCH),
+ .cache = (CACHE_NEW_WM_PROG)
+ },
+ .prepare = prepare_constant_buffer,
+ .emit = emit_constant_buffer,
+};
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 08:49:55 +0000