1 /* r300_cmdbuf.c -- Command buffer emission for R300 -*- linux-c -*-
3 * Copyright (C) The Weather Channel, Inc. 2002.
4 * Copyright (C) 2004 Nicolai Haehnle.
7 * The Weather Channel (TM) funded Tungsten Graphics to develop the
8 * initial release of the Radeon 8500 driver under the XFree86 license.
9 * This notice must be preserved.
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the next
19 * paragraph) shall be included in all copies or substantial portions of the
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
26 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
27 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
31 * Nicolai Haehnle <prefect_@gmx.net>
36 #include "radeon_drm.h"
37 #include "radeon_drv.h"
40 #define R300_SIMULTANEOUS_CLIPRECTS 4
42 /* Values for R300_RE_CLIPRECT_CNTL depending on the number of cliprects
44 static const int r300_cliprect_cntl[4] = {
52 * Emit up to R300_SIMULTANEOUS_CLIPRECTS cliprects from the given command
53 * buffer, starting with index n.
55 static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
56 drm_radeon_kcmd_buffer_t *cmdbuf, int n)
58 struct drm_clip_rect box;
63 nr = cmdbuf->nbox - n;
64 if (nr > R300_SIMULTANEOUS_CLIPRECTS)
65 nr = R300_SIMULTANEOUS_CLIPRECTS;
67 DRM_DEBUG("%i cliprects\n", nr);
70 BEGIN_RING(6 + nr * 2);
71 OUT_RING(CP_PACKET0(R300_RE_CLIPRECT_TL_0, nr * 2 - 1));
73 for (i = 0; i < nr; ++i) {
74 if (DRM_COPY_FROM_USER_UNCHECKED
75 (&box, &cmdbuf->boxes[n + i], sizeof(box))) {
76 DRM_ERROR("copy cliprect faulted\n");
80 if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
90 box.x1 = (box.x1 + R300_CLIPRECT_OFFSET) &
92 box.y1 = (box.y1 + R300_CLIPRECT_OFFSET) &
94 box.x2 = (box.x2 + R300_CLIPRECT_OFFSET) &
96 box.y2 = (box.y2 + R300_CLIPRECT_OFFSET) &
100 OUT_RING((box.x1 << R300_CLIPRECT_X_SHIFT) |
101 (box.y1 << R300_CLIPRECT_Y_SHIFT));
102 OUT_RING((box.x2 << R300_CLIPRECT_X_SHIFT) |
103 (box.y2 << R300_CLIPRECT_Y_SHIFT));
107 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, r300_cliprect_cntl[nr - 1]);
109 /* TODO/SECURITY: Force scissors to a safe value, otherwise the
110 * client might be able to trample over memory.
111 * The impact should be very limited, but I'd rather be safe than
114 OUT_RING(CP_PACKET0(R300_RE_SCISSORS_TL, 1));
116 OUT_RING(R300_SCISSORS_X_MASK | R300_SCISSORS_Y_MASK);
119 /* Why we allow zero cliprect rendering:
120 * There are some commands in a command buffer that must be submitted
121 * even when there are no cliprects, e.g. DMA buffer discard
122 * or state setting (though state setting could be avoided by
123 * simulating a loss of context).
125 * Now since the cmdbuf interface is so chaotic right now (and is
126 * bound to remain that way for a bit until things settle down),
127 * it is basically impossible to filter out the commands that are
128 * necessary and those that aren't.
130 * So I choose the safe way and don't do any filtering at all;
131 * instead, I simply set up the engine so that all rendering
132 * can't produce any fragments.
135 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, 0);
142 static u8 r300_reg_flags[0x10000 >> 2];
144 void r300_init_reg_flags(struct drm_device *dev)
147 drm_radeon_private_t *dev_priv = dev->dev_private;
149 memset(r300_reg_flags, 0, 0x10000 >> 2);
150 #define ADD_RANGE_MARK(reg, count,mark) \
151 for(i=((reg)>>2);i<((reg)>>2)+(count);i++)\
152 r300_reg_flags[i]|=(mark);
155 #define MARK_CHECK_OFFSET 2
157 #define ADD_RANGE(reg, count) ADD_RANGE_MARK(reg, count, MARK_SAFE)
159 /* these match cmducs() command in r300_driver/r300/r300_cmdbuf.c */
160 ADD_RANGE(R300_SE_VPORT_XSCALE, 6);
161 ADD_RANGE(R300_VAP_CNTL, 1);
162 ADD_RANGE(R300_SE_VTE_CNTL, 2);
163 ADD_RANGE(0x2134, 2);
164 ADD_RANGE(R300_VAP_CNTL_STATUS, 1);
165 ADD_RANGE(R300_VAP_INPUT_CNTL_0, 2);
166 ADD_RANGE(0x21DC, 1);
167 ADD_RANGE(R300_VAP_UNKNOWN_221C, 1);
168 ADD_RANGE(R300_VAP_CLIP_X_0, 4);
169 ADD_RANGE(R300_VAP_PVS_WAITIDLE, 1);
170 ADD_RANGE(R300_VAP_UNKNOWN_2288, 1);
171 ADD_RANGE(R300_VAP_OUTPUT_VTX_FMT_0, 2);
172 ADD_RANGE(R300_VAP_PVS_CNTL_1, 3);
173 ADD_RANGE(R300_GB_ENABLE, 1);
174 ADD_RANGE(R300_GB_MSPOS0, 5);
175 ADD_RANGE(R300_TX_CNTL, 1);
176 ADD_RANGE(R300_TX_ENABLE, 1);
177 ADD_RANGE(0x4200, 4);
178 ADD_RANGE(0x4214, 1);
179 ADD_RANGE(R300_RE_POINTSIZE, 1);
180 ADD_RANGE(0x4230, 3);
181 ADD_RANGE(R300_RE_LINE_CNT, 1);
182 ADD_RANGE(R300_RE_UNK4238, 1);
183 ADD_RANGE(0x4260, 3);
184 ADD_RANGE(R300_RE_SHADE, 4);
185 ADD_RANGE(R300_RE_POLYGON_MODE, 5);
186 ADD_RANGE(R300_RE_ZBIAS_CNTL, 1);
187 ADD_RANGE(R300_RE_ZBIAS_T_FACTOR, 4);
188 ADD_RANGE(R300_RE_OCCLUSION_CNTL, 1);
189 ADD_RANGE(R300_RE_CULL_CNTL, 1);
190 ADD_RANGE(0x42C0, 2);
191 ADD_RANGE(R300_RS_CNTL_0, 2);
193 ADD_RANGE(0x43A4, 2);
194 ADD_RANGE(0x43E8, 1);
196 ADD_RANGE(0x46A4, 5);
198 ADD_RANGE(R300_RE_FOG_STATE, 1);
199 ADD_RANGE(R300_FOG_COLOR_R, 3);
200 ADD_RANGE(R300_PP_ALPHA_TEST, 2);
201 ADD_RANGE(0x4BD8, 1);
202 ADD_RANGE(R300_PFS_PARAM_0_X, 64);
203 ADD_RANGE(0x4E00, 1);
204 ADD_RANGE(R300_RB3D_CBLEND, 2);
205 ADD_RANGE(R300_RB3D_COLORMASK, 1);
206 ADD_RANGE(R300_RB3D_BLEND_COLOR, 3);
207 ADD_RANGE_MARK(R300_RB3D_COLOROFFSET0, 1, MARK_CHECK_OFFSET); /* check offset */
208 ADD_RANGE(R300_RB3D_COLORPITCH0, 1);
209 ADD_RANGE(0x4E50, 9);
210 ADD_RANGE(0x4E88, 1);
211 ADD_RANGE(0x4EA0, 2);
212 ADD_RANGE(R300_RB3D_ZSTENCIL_CNTL_0, 3);
213 ADD_RANGE(R300_RB3D_ZSTENCIL_FORMAT, 4);
214 ADD_RANGE_MARK(R300_RB3D_DEPTHOFFSET, 1, MARK_CHECK_OFFSET); /* check offset */
215 ADD_RANGE(R300_RB3D_DEPTHPITCH, 1);
216 ADD_RANGE(0x4F28, 1);
217 ADD_RANGE(0x4F30, 2);
218 ADD_RANGE(0x4F44, 1);
219 ADD_RANGE(0x4F54, 1);
221 ADD_RANGE(R300_TX_FILTER_0, 16);
222 ADD_RANGE(R300_TX_FILTER1_0, 16);
223 ADD_RANGE(R300_TX_SIZE_0, 16);
224 ADD_RANGE(R300_TX_FORMAT_0, 16);
225 ADD_RANGE(R300_TX_PITCH_0, 16);
226 /* Texture offset is dangerous and needs more checking */
227 ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
228 ADD_RANGE(R300_TX_CHROMA_KEY_0, 16);
229 ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
231 /* Sporadic registers used as primitives are emitted */
232 ADD_RANGE(R300_RB3D_ZCACHE_CTLSTAT, 1);
233 ADD_RANGE(R300_RB3D_DSTCACHE_CTLSTAT, 1);
234 ADD_RANGE(R300_VAP_INPUT_ROUTE_0_0, 8);
235 ADD_RANGE(R300_VAP_INPUT_ROUTE_1_0, 8);
237 if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
238 ADD_RANGE(R500_RS_IP_0, 16);
239 ADD_RANGE(R500_RS_INST_0, 16);
241 ADD_RANGE(R300_PFS_CNTL_0, 3);
242 ADD_RANGE(R300_PFS_NODE_0, 4);
243 ADD_RANGE(R300_PFS_TEXI_0, 64);
244 ADD_RANGE(R300_PFS_INSTR0_0, 64);
245 ADD_RANGE(R300_PFS_INSTR1_0, 64);
246 ADD_RANGE(R300_PFS_INSTR2_0, 64);
247 ADD_RANGE(R300_PFS_INSTR3_0, 64);
248 ADD_RANGE(R300_RS_INTERP_0, 8);
249 ADD_RANGE(R300_RS_ROUTE_0, 8);
254 static __inline__ int r300_check_range(unsigned reg, int count)
259 for (i = (reg >> 2); i < (reg >> 2) + count; i++)
260 if (r300_reg_flags[i] != MARK_SAFE)
265 static __inline__ int r300_emit_carefully_checked_packet0(drm_radeon_private_t *
267 drm_radeon_kcmd_buffer_t
269 drm_r300_cmd_header_t
278 sz = header.packet0.count;
279 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
281 if ((sz > 64) || (sz < 0)) {
283 ("Cannot emit more than 64 values at a time (reg=%04x sz=%d)\n",
287 for (i = 0; i < sz; i++) {
288 values[i] = ((int *)cmdbuf->buf)[i];
289 switch (r300_reg_flags[(reg >> 2) + i]) {
292 case MARK_CHECK_OFFSET:
293 if (!radeon_check_offset(dev_priv, (u32) values[i])) {
295 ("Offset failed range check (reg=%04x sz=%d)\n",
301 DRM_ERROR("Register %04x failed check as flag=%02x\n",
302 reg + i * 4, r300_reg_flags[(reg >> 2) + i]);
308 OUT_RING(CP_PACKET0(reg, sz - 1));
309 OUT_RING_TABLE(values, sz);
312 cmdbuf->buf += sz * 4;
313 cmdbuf->bufsz -= sz * 4;
319 * Emits a packet0 setting arbitrary registers.
320 * Called by r300_do_cp_cmdbuf.
322 * Note that checks are performed on contents and addresses of the registers
324 static __inline__ int r300_emit_packet0(drm_radeon_private_t *dev_priv,
325 drm_radeon_kcmd_buffer_t *cmdbuf,
326 drm_r300_cmd_header_t header)
332 sz = header.packet0.count;
333 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
338 if (sz * 4 > cmdbuf->bufsz)
341 if (reg + sz * 4 >= 0x10000) {
342 DRM_ERROR("No such registers in hardware reg=%04x sz=%d\n", reg,
347 if (r300_check_range(reg, sz)) {
348 /* go and check everything */
349 return r300_emit_carefully_checked_packet0(dev_priv, cmdbuf,
352 /* the rest of the data is safe to emit, whatever the values the user passed */
355 OUT_RING(CP_PACKET0(reg, sz - 1));
356 OUT_RING_TABLE((int *)cmdbuf->buf, sz);
359 cmdbuf->buf += sz * 4;
360 cmdbuf->bufsz -= sz * 4;
366 * Uploads user-supplied vertex program instructions or parameters onto
368 * Called by r300_do_cp_cmdbuf.
370 static __inline__ int r300_emit_vpu(drm_radeon_private_t *dev_priv,
371 drm_radeon_kcmd_buffer_t *cmdbuf,
372 drm_r300_cmd_header_t header)
378 sz = header.vpu.count;
379 addr = (header.vpu.adrhi << 8) | header.vpu.adrlo;
383 if (sz * 16 > cmdbuf->bufsz)
386 BEGIN_RING(5 + sz * 4);
387 /* Wait for VAP to come to senses.. */
388 /* there is no need to emit it multiple times, (only once before VAP is programmed,
389 but this optimization is for later */
390 OUT_RING_REG(R300_VAP_PVS_WAITIDLE, 0);
391 OUT_RING_REG(R300_VAP_PVS_UPLOAD_ADDRESS, addr);
392 OUT_RING(CP_PACKET0_TABLE(R300_VAP_PVS_UPLOAD_DATA, sz * 4 - 1));
393 OUT_RING_TABLE((int *)cmdbuf->buf, sz * 4);
397 cmdbuf->buf += sz * 16;
398 cmdbuf->bufsz -= sz * 16;
404 * Emit a clear packet from userspace.
405 * Called by r300_emit_packet3.
407 static __inline__ int r300_emit_clear(drm_radeon_private_t *dev_priv,
408 drm_radeon_kcmd_buffer_t *cmdbuf)
412 if (8 * 4 > cmdbuf->bufsz)
416 OUT_RING(CP_PACKET3(R200_3D_DRAW_IMMD_2, 8));
417 OUT_RING(R300_PRIM_TYPE_POINT | R300_PRIM_WALK_RING |
418 (1 << R300_PRIM_NUM_VERTICES_SHIFT));
419 OUT_RING_TABLE((int *)cmdbuf->buf, 8);
422 cmdbuf->buf += 8 * 4;
423 cmdbuf->bufsz -= 8 * 4;
428 static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t *dev_priv,
429 drm_radeon_kcmd_buffer_t *cmdbuf,
433 #define MAX_ARRAY_PACKET 64
434 u32 payload[MAX_ARRAY_PACKET];
438 count = (header >> 16) & 0x3fff;
440 if ((count + 1) > MAX_ARRAY_PACKET) {
441 DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
445 memset(payload, 0, MAX_ARRAY_PACKET * 4);
446 memcpy(payload, cmdbuf->buf + 4, (count + 1) * 4);
448 /* carefully check packet contents */
450 narrays = payload[0];
453 while ((k < narrays) && (i < (count + 1))) {
454 i++; /* skip attribute field */
455 if (!radeon_check_offset(dev_priv, payload[i])) {
457 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
465 /* have one more to process, they come in pairs */
466 if (!radeon_check_offset(dev_priv, payload[i])) {
468 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
475 /* do the counts match what we expect ? */
476 if ((k != narrays) || (i != (count + 1))) {
478 ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
479 k, i, narrays, count + 1);
483 /* all clear, output packet */
485 BEGIN_RING(count + 2);
487 OUT_RING_TABLE(payload, count + 1);
490 cmdbuf->buf += (count + 2) * 4;
491 cmdbuf->bufsz -= (count + 2) * 4;
496 static __inline__ int r300_emit_bitblt_multi(drm_radeon_private_t *dev_priv,
497 drm_radeon_kcmd_buffer_t *cmdbuf)
499 u32 *cmd = (u32 *) cmdbuf->buf;
503 count=(cmd[0]>>16) & 0x3fff;
505 if (cmd[0] & 0x8000) {
508 if (cmd[1] & (RADEON_GMC_SRC_PITCH_OFFSET_CNTL
509 | RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
510 offset = cmd[2] << 10;
511 ret = !radeon_check_offset(dev_priv, offset);
513 DRM_ERROR("Invalid bitblt first offset is %08X\n", offset);
518 if ((cmd[1] & RADEON_GMC_SRC_PITCH_OFFSET_CNTL) &&
519 (cmd[1] & RADEON_GMC_DST_PITCH_OFFSET_CNTL)) {
520 offset = cmd[3] << 10;
521 ret = !radeon_check_offset(dev_priv, offset);
523 DRM_ERROR("Invalid bitblt second offset is %08X\n", offset);
532 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
535 cmdbuf->buf += (count+2)*4;
536 cmdbuf->bufsz -= (count+2)*4;
541 static __inline__ int r300_emit_indx_buffer(drm_radeon_private_t *dev_priv,
542 drm_radeon_kcmd_buffer_t *cmdbuf)
544 u32 *cmd = (u32 *) cmdbuf->buf;
548 count=(cmd[0]>>16) & 0x3fff;
550 if ((cmd[1] & 0x8000ffff) != 0x80000810) {
551 DRM_ERROR("Invalid indx_buffer reg address %08X\n", cmd[1]);
554 ret = !radeon_check_offset(dev_priv, cmd[2]);
556 DRM_ERROR("Invalid indx_buffer offset is %08X\n", cmd[2]);
562 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
565 cmdbuf->buf += (count+2)*4;
566 cmdbuf->bufsz -= (count+2)*4;
571 static __inline__ int r300_emit_raw_packet3(drm_radeon_private_t *dev_priv,
572 drm_radeon_kcmd_buffer_t *cmdbuf)
578 if (4 > cmdbuf->bufsz)
581 /* Fixme !! This simply emits a packet without much checking.
582 We need to be smarter. */
584 /* obtain first word - actual packet3 header */
585 header = *(u32 *) cmdbuf->buf;
587 /* Is it packet 3 ? */
588 if ((header >> 30) != 0x3) {
589 DRM_ERROR("Not a packet3 header (0x%08x)\n", header);
593 count = (header >> 16) & 0x3fff;
595 /* Check again now that we know how much data to expect */
596 if ((count + 2) * 4 > cmdbuf->bufsz) {
598 ("Expected packet3 of length %d but have only %d bytes left\n",
599 (count + 2) * 4, cmdbuf->bufsz);
603 /* Is it a packet type we know about ? */
604 switch (header & 0xff00) {
605 case RADEON_3D_LOAD_VBPNTR: /* load vertex array pointers */
606 return r300_emit_3d_load_vbpntr(dev_priv, cmdbuf, header);
608 case RADEON_CNTL_BITBLT_MULTI:
609 return r300_emit_bitblt_multi(dev_priv, cmdbuf);
611 case RADEON_CP_INDX_BUFFER: /* DRAW_INDX_2 without INDX_BUFFER seems to lock up the gpu */
612 return r300_emit_indx_buffer(dev_priv, cmdbuf);
613 case RADEON_CP_3D_DRAW_IMMD_2: /* triggers drawing using in-packet vertex data */
614 case RADEON_CP_3D_DRAW_VBUF_2: /* triggers drawing of vertex buffers setup elsewhere */
615 case RADEON_CP_3D_DRAW_INDX_2: /* triggers drawing using indices to vertex buffer */
616 case RADEON_WAIT_FOR_IDLE:
618 /* these packets are safe */
621 DRM_ERROR("Unknown packet3 header (0x%08x)\n", header);
625 BEGIN_RING(count + 2);
627 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
630 cmdbuf->buf += (count + 2) * 4;
631 cmdbuf->bufsz -= (count + 2) * 4;
637 * Emit a rendering packet3 from userspace.
638 * Called by r300_do_cp_cmdbuf.
640 static __inline__ int r300_emit_packet3(drm_radeon_private_t *dev_priv,
641 drm_radeon_kcmd_buffer_t *cmdbuf,
642 drm_r300_cmd_header_t header)
646 char *orig_buf = cmdbuf->buf;
647 int orig_bufsz = cmdbuf->bufsz;
649 /* This is a do-while-loop so that we run the interior at least once,
650 * even if cmdbuf->nbox is 0. Compare r300_emit_cliprects for rationale.
654 if (cmdbuf->nbox > R300_SIMULTANEOUS_CLIPRECTS) {
655 ret = r300_emit_cliprects(dev_priv, cmdbuf, n);
659 cmdbuf->buf = orig_buf;
660 cmdbuf->bufsz = orig_bufsz;
663 switch (header.packet3.packet) {
664 case R300_CMD_PACKET3_CLEAR:
665 DRM_DEBUG("R300_CMD_PACKET3_CLEAR\n");
666 ret = r300_emit_clear(dev_priv, cmdbuf);
668 DRM_ERROR("r300_emit_clear failed\n");
673 case R300_CMD_PACKET3_RAW:
674 DRM_DEBUG("R300_CMD_PACKET3_RAW\n");
675 ret = r300_emit_raw_packet3(dev_priv, cmdbuf);
677 DRM_ERROR("r300_emit_raw_packet3 failed\n");
683 DRM_ERROR("bad packet3 type %i at %p\n",
684 header.packet3.packet,
685 cmdbuf->buf - sizeof(header));
689 n += R300_SIMULTANEOUS_CLIPRECTS;
690 } while (n < cmdbuf->nbox);
695 /* Some of the R300 chips seem to be extremely touchy about the two registers
696 * that are configured in r300_pacify.
697 * Among the worst offenders seems to be the R300 ND (0x4E44): When userspace
698 * sends a command buffer that contains only state setting commands and a
699 * vertex program/parameter upload sequence, this will eventually lead to a
700 * lockup, unless the sequence is bracketed by calls to r300_pacify.
701 * So we should take great care to *always* call r300_pacify before
702 * *anything* 3D related, and again afterwards. This is what the
703 * call bracket in r300_do_cp_cmdbuf is for.
707 * Emit the sequence to pacify R300.
709 static __inline__ void r300_pacify(drm_radeon_private_t *dev_priv)
714 OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
715 OUT_RING(R300_RB3D_DSTCACHE_UNKNOWN_0A);
716 OUT_RING(CP_PACKET0(R300_RB3D_ZCACHE_CTLSTAT, 0));
717 OUT_RING(R300_RB3D_ZCACHE_UNKNOWN_03);
718 OUT_RING(CP_PACKET3(RADEON_CP_NOP, 0));
724 * Called by r300_do_cp_cmdbuf to update the internal buffer age and state.
725 * The actual age emit is done by r300_do_cp_cmdbuf, which is why you must
726 * be careful about how this function is called.
728 static void r300_discard_buffer(struct drm_device * dev, struct drm_buf * buf)
730 drm_radeon_private_t *dev_priv = dev->dev_private;
731 drm_radeon_buf_priv_t *buf_priv = buf->dev_private;
733 buf_priv->age = ++dev_priv->sarea_priv->last_dispatch;
738 static int r300_scratch(drm_radeon_private_t *dev_priv,
739 drm_radeon_kcmd_buffer_t *cmdbuf,
740 drm_r300_cmd_header_t header)
743 u32 i, buf_idx, h_pending;
746 if (cmdbuf->bufsz < sizeof(uint64_t) + header.scratch.n_bufs * sizeof(buf_idx) ) {
750 if (header.scratch.reg >= 5) {
754 dev_priv->scratch_ages[header.scratch.reg] ++;
756 ref_age_base = (u32 *)(unsigned long)*((uint64_t *)cmdbuf->buf);
758 cmdbuf->buf += sizeof(uint64_t);
759 cmdbuf->bufsz -= sizeof(uint64_t);
761 for (i=0; i < header.scratch.n_bufs; i++) {
762 buf_idx = *(u32 *)cmdbuf->buf;
763 buf_idx *= 2; /* 8 bytes per buf */
765 if (DRM_COPY_TO_USER(ref_age_base + buf_idx, &dev_priv->scratch_ages[header.scratch.reg], sizeof(u32))) {
769 if (DRM_COPY_FROM_USER(&h_pending, ref_age_base + buf_idx + 1, sizeof(u32))) {
773 if (h_pending == 0) {
779 if (DRM_COPY_TO_USER(ref_age_base + buf_idx + 1, &h_pending, sizeof(u32))) {
783 cmdbuf->buf += sizeof(buf_idx);
784 cmdbuf->bufsz -= sizeof(buf_idx);
788 OUT_RING( CP_PACKET0( RADEON_SCRATCH_REG0 + header.scratch.reg * 4, 0 ) );
789 OUT_RING( dev_priv->scratch_ages[header.scratch.reg] );
796 * Uploads user-supplied vertex program instructions or parameters onto
798 * Called by r300_do_cp_cmdbuf.
800 static __inline__ int r300_emit_r500fp(drm_radeon_private_t *dev_priv,
801 drm_radeon_kcmd_buffer_t *cmdbuf,
802 drm_r300_cmd_header_t header)
808 sz = header.r500fp.count;
809 addr = (header.r500fp.adrhi << 8) | header.r500fp.adrlo;
813 if (sz * 16 > cmdbuf->bufsz)
816 BEGIN_RING(4 + sz * 4);
817 /* Wait for VAP to come to senses.. */
818 /* there is no need to emit it multiple times, (only once before VAP is programmed,
819 but this optimization is for later */
820 OUT_RING_REG(R500_GA_US_VECTOR_INDEX, addr);
821 OUT_RING(CP_PACKET0_TABLE(R500_GA_US_VECTOR_DATA, sz * 4 - 1));
822 OUT_RING_TABLE((int *)cmdbuf->buf, sz * 4);
826 cmdbuf->buf += sz * 16;
827 cmdbuf->bufsz -= sz * 16;
834 * Parses and validates a user-supplied command buffer and emits appropriate
835 * commands on the DMA ring buffer.
836 * Called by the ioctl handler function radeon_cp_cmdbuf.
838 int r300_do_cp_cmdbuf(struct drm_device *dev,
839 struct drm_file *file_priv,
840 drm_radeon_kcmd_buffer_t *cmdbuf)
842 drm_radeon_private_t *dev_priv = dev->dev_private;
843 struct drm_device_dma *dma = dev->dma;
844 struct drm_buf *buf = NULL;
845 int emit_dispatch_age = 0;
850 /* See the comment above r300_emit_begin3d for why this call must be here,
851 * and what the cleanup gotos are for. */
852 r300_pacify(dev_priv);
854 if (cmdbuf->nbox <= R300_SIMULTANEOUS_CLIPRECTS) {
855 ret = r300_emit_cliprects(dev_priv, cmdbuf, 0);
860 while (cmdbuf->bufsz >= sizeof(drm_r300_cmd_header_t)) {
862 drm_r300_cmd_header_t header;
864 header.u = *(unsigned int *)cmdbuf->buf;
866 cmdbuf->buf += sizeof(header);
867 cmdbuf->bufsz -= sizeof(header);
869 switch (header.header.cmd_type) {
870 case R300_CMD_PACKET0:
871 DRM_DEBUG("R300_CMD_PACKET0\n");
872 ret = r300_emit_packet0(dev_priv, cmdbuf, header);
874 DRM_ERROR("r300_emit_packet0 failed\n");
880 DRM_DEBUG("R300_CMD_VPU\n");
881 ret = r300_emit_vpu(dev_priv, cmdbuf, header);
883 DRM_ERROR("r300_emit_vpu failed\n");
888 case R300_CMD_PACKET3:
889 DRM_DEBUG("R300_CMD_PACKET3\n");
890 ret = r300_emit_packet3(dev_priv, cmdbuf, header);
892 DRM_ERROR("r300_emit_packet3 failed\n");
898 DRM_DEBUG("R300_CMD_END3D\n");
900 Ideally userspace driver should not need to issue this call,
901 i.e. the drm driver should issue it automatically and prevent
904 In practice, we do not understand why this call is needed and what
905 it does (except for some vague guesses that it has to do with cache
906 coherence) and so the user space driver does it.
908 Once we are sure which uses prevent lockups the code could be moved
909 into the kernel and the userspace driver will not
910 need to use this command.
912 Note that issuing this command does not hurt anything
913 except, possibly, performance */
914 r300_pacify(dev_priv);
917 case R300_CMD_CP_DELAY:
918 /* simple enough, we can do it here */
919 DRM_DEBUG("R300_CMD_CP_DELAY\n");
924 BEGIN_RING(header.delay.count);
925 for (i = 0; i < header.delay.count; i++)
926 OUT_RING(RADEON_CP_PACKET2);
931 case R300_CMD_DMA_DISCARD:
932 DRM_DEBUG("RADEON_CMD_DMA_DISCARD\n");
933 idx = header.dma.buf_idx;
934 if (idx < 0 || idx >= dma->buf_count) {
935 DRM_ERROR("buffer index %d (of %d max)\n",
936 idx, dma->buf_count - 1);
941 buf = dma->buflist[idx];
942 if (buf->file_priv != file_priv || buf->pending) {
943 DRM_ERROR("bad buffer %p %p %d\n",
944 buf->file_priv, file_priv,
950 emit_dispatch_age = 1;
951 r300_discard_buffer(dev, buf);
955 /* simple enough, we can do it here */
956 DRM_DEBUG("R300_CMD_WAIT\n");
957 if (header.wait.flags == 0)
958 break; /* nothing to do */
964 OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
965 OUT_RING((header.wait.flags & 0xf) << 14);
970 case R300_CMD_SCRATCH:
971 DRM_DEBUG("R300_CMD_SCRATCH\n");
972 ret = r300_scratch(dev_priv, cmdbuf, header);
974 DRM_ERROR("r300_scratch failed\n");
979 case R300_CMD_R500FP:
980 if ((dev_priv->flags & RADEON_FAMILY_MASK) < CHIP_RV515) {
981 DRM_ERROR("Calling r500 command on r300 card\n");
985 DRM_DEBUG("R300_CMD_R500FP\n");
986 ret = r300_emit_r500fp(dev_priv, cmdbuf, header);
988 DRM_ERROR("r300_emit_r500fp failed\n");
993 DRM_ERROR("bad cmd_type %i at %p\n",
994 header.header.cmd_type,
995 cmdbuf->buf - sizeof(header));
1004 r300_pacify(dev_priv);
1006 /* We emit the vertex buffer age here, outside the pacifier "brackets"
1008 * (1) This may coalesce multiple age emissions into a single one and
1009 * (2) more importantly, some chips lock up hard when scratch registers
1010 * are written inside the pacifier bracket.
1012 if (emit_dispatch_age) {
1015 /* Emit the vertex buffer age */
1017 RADEON_DISPATCH_AGE(dev_priv->sarea_priv->last_dispatch);