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)
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");
77 return DRM_ERR(EFAULT);
82 R300_CLIPRECT_OFFSET) & R300_CLIPRECT_MASK;
85 R300_CLIPRECT_OFFSET) & R300_CLIPRECT_MASK;
88 R300_CLIPRECT_OFFSET) & R300_CLIPRECT_MASK;
91 R300_CLIPRECT_OFFSET) & R300_CLIPRECT_MASK;
93 OUT_RING((box.x1 << R300_CLIPRECT_X_SHIFT) |
94 (box.y1 << R300_CLIPRECT_Y_SHIFT));
95 OUT_RING((box.x2 << R300_CLIPRECT_X_SHIFT) |
96 (box.y2 << R300_CLIPRECT_Y_SHIFT));
99 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, r300_cliprect_cntl[nr - 1]);
101 /* TODO/SECURITY: Force scissors to a safe value, otherwise the
102 * client might be able to trample over memory.
103 * The impact should be very limited, but I'd rather be safe than
106 OUT_RING(CP_PACKET0(R300_RE_SCISSORS_TL, 1));
108 OUT_RING(R300_SCISSORS_X_MASK | R300_SCISSORS_Y_MASK);
111 /* Why we allow zero cliprect rendering:
112 * There are some commands in a command buffer that must be submitted
113 * even when there are no cliprects, e.g. DMA buffer discard
114 * or state setting (though state setting could be avoided by
115 * simulating a loss of context).
117 * Now since the cmdbuf interface is so chaotic right now (and is
118 * bound to remain that way for a bit until things settle down),
119 * it is basically impossible to filter out the commands that are
120 * necessary and those that aren't.
122 * So I choose the safe way and don't do any filtering at all;
123 * instead, I simply set up the engine so that all rendering
124 * can't produce any fragments.
127 OUT_RING_REG(R300_RE_CLIPRECT_CNTL, 0);
134 static u8 r300_reg_flags[0x10000 >> 2];
136 void r300_init_reg_flags(void)
139 memset(r300_reg_flags, 0, 0x10000 >> 2);
140 #define ADD_RANGE_MARK(reg, count,mark) \
141 for(i=((reg)>>2);i<((reg)>>2)+(count);i++)\
142 r300_reg_flags[i]|=(mark);
145 #define MARK_CHECK_OFFSET 2
147 #define ADD_RANGE(reg, count) ADD_RANGE_MARK(reg, count, MARK_SAFE)
149 /* these match cmducs() command in r300_driver/r300/r300_cmdbuf.c */
150 ADD_RANGE(R300_SE_VPORT_XSCALE, 6);
151 ADD_RANGE(0x2080, 1);
152 ADD_RANGE(R300_SE_VTE_CNTL, 2);
153 ADD_RANGE(0x2134, 2);
154 ADD_RANGE(0x2140, 1);
155 ADD_RANGE(R300_VAP_INPUT_CNTL_0, 2);
156 ADD_RANGE(0x21DC, 1);
157 ADD_RANGE(0x221C, 1);
158 ADD_RANGE(0x2220, 4);
159 ADD_RANGE(0x2288, 1);
160 ADD_RANGE(R300_VAP_OUTPUT_VTX_FMT_0, 2);
161 ADD_RANGE(R300_VAP_PVS_CNTL_1, 3);
162 ADD_RANGE(R300_GB_ENABLE, 1);
163 ADD_RANGE(R300_GB_MSPOS0, 5);
164 ADD_RANGE(R300_TX_ENABLE, 1);
165 ADD_RANGE(0x4200, 4);
166 ADD_RANGE(0x4214, 1);
167 ADD_RANGE(R300_RE_POINTSIZE, 1);
168 ADD_RANGE(0x4230, 3);
169 ADD_RANGE(R300_RE_LINE_CNT, 1);
170 ADD_RANGE(0x4238, 1);
171 ADD_RANGE(0x4260, 3);
172 ADD_RANGE(0x4274, 4);
173 ADD_RANGE(0x4288, 5);
174 ADD_RANGE(0x42A0, 1);
175 ADD_RANGE(R300_RE_ZBIAS_T_FACTOR, 4);
176 ADD_RANGE(0x42B4, 1);
177 ADD_RANGE(R300_RE_CULL_CNTL, 1);
178 ADD_RANGE(0x42C0, 2);
179 ADD_RANGE(R300_RS_CNTL_0, 2);
180 ADD_RANGE(R300_RS_INTERP_0, 8);
181 ADD_RANGE(R300_RS_ROUTE_0, 8);
182 ADD_RANGE(0x43A4, 2);
183 ADD_RANGE(0x43E8, 1);
184 ADD_RANGE(R300_PFS_CNTL_0, 3);
185 ADD_RANGE(R300_PFS_NODE_0, 4);
186 ADD_RANGE(R300_PFS_TEXI_0, 64);
187 ADD_RANGE(0x46A4, 5);
188 ADD_RANGE(R300_PFS_INSTR0_0, 64);
189 ADD_RANGE(R300_PFS_INSTR1_0, 64);
190 ADD_RANGE(R300_PFS_INSTR2_0, 64);
191 ADD_RANGE(R300_PFS_INSTR3_0, 64);
192 ADD_RANGE(0x4BC0, 1);
193 ADD_RANGE(0x4BC8, 3);
194 ADD_RANGE(R300_PP_ALPHA_TEST, 2);
195 ADD_RANGE(0x4BD8, 1);
196 ADD_RANGE(R300_PFS_PARAM_0_X, 64);
197 ADD_RANGE(0x4E00, 1);
198 ADD_RANGE(R300_RB3D_CBLEND, 2);
199 ADD_RANGE(R300_RB3D_COLORMASK, 1);
200 ADD_RANGE(0x4E10, 3);
201 ADD_RANGE_MARK(R300_RB3D_COLOROFFSET0, 1, MARK_CHECK_OFFSET); /* check offset */
202 ADD_RANGE(R300_RB3D_COLORPITCH0, 1);
203 ADD_RANGE(0x4E50, 9);
204 ADD_RANGE(0x4E88, 1);
205 ADD_RANGE(0x4EA0, 2);
206 ADD_RANGE(R300_RB3D_ZSTENCIL_CNTL_0, 3);
207 ADD_RANGE(0x4F10, 4);
208 ADD_RANGE_MARK(R300_RB3D_DEPTHOFFSET, 1, MARK_CHECK_OFFSET); /* check offset */
209 ADD_RANGE(R300_RB3D_DEPTHPITCH, 1);
210 ADD_RANGE(0x4F28, 1);
211 ADD_RANGE(0x4F30, 2);
212 ADD_RANGE(0x4F44, 1);
213 ADD_RANGE(0x4F54, 1);
215 ADD_RANGE(R300_TX_FILTER_0, 16);
216 ADD_RANGE(R300_TX_UNK1_0, 16);
217 ADD_RANGE(R300_TX_SIZE_0, 16);
218 ADD_RANGE(R300_TX_FORMAT_0, 16);
219 /* Texture offset is dangerous and needs more checking */
220 ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
221 ADD_RANGE(R300_TX_UNK4_0, 16);
222 ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
224 /* Sporadic registers used as primitives are emitted */
225 ADD_RANGE(0x4f18, 1);
226 ADD_RANGE(R300_RB3D_DSTCACHE_CTLSTAT, 1);
227 ADD_RANGE(R300_VAP_INPUT_ROUTE_0_0, 8);
228 ADD_RANGE(R300_VAP_INPUT_ROUTE_1_0, 8);
232 static __inline__ int r300_check_range(unsigned reg, int count)
237 for (i = (reg >> 2); i < (reg >> 2) + count; i++)
238 if (r300_reg_flags[i] != MARK_SAFE)
243 /* we expect offsets passed to the framebuffer to be either within video memory or
245 static __inline__ int r300_check_offset(drm_radeon_private_t * dev_priv,
248 /* we realy want to check against end of video aperture
249 but this value is not being kept.
250 This code is correct for now (does the same thing as the
251 code that sets MC_FB_LOCATION) in radeon_cp.c */
252 if ((offset >= dev_priv->fb_location) &&
253 (offset < dev_priv->gart_vm_start))
255 if ((offset >= dev_priv->gart_vm_start) &&
256 (offset < dev_priv->gart_vm_start + dev_priv->gart_size))
261 static __inline__ int r300_emit_carefully_checked_packet0(drm_radeon_private_t *
263 drm_radeon_kcmd_buffer_t
265 drm_r300_cmd_header_t
274 sz = header.packet0.count;
275 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
277 if ((sz > 64) || (sz < 0)) {
279 ("Cannot emit more than 64 values at a time (reg=%04x sz=%d)\n",
281 return DRM_ERR(EINVAL);
283 for (i = 0; i < sz; i++) {
284 values[i] = ((int *)cmdbuf->buf)[i];
285 switch (r300_reg_flags[(reg >> 2) + i]) {
288 case MARK_CHECK_OFFSET:
289 if (r300_check_offset(dev_priv, (u32) values[i])) {
291 ("Offset failed range check (reg=%04x sz=%d)\n",
293 return DRM_ERR(EINVAL);
297 DRM_ERROR("Register %04x failed check as flag=%02x\n",
298 reg + i * 4, r300_reg_flags[(reg >> 2) + i]);
299 return DRM_ERR(EINVAL);
304 OUT_RING(CP_PACKET0(reg, sz - 1));
305 OUT_RING_TABLE(values, sz);
308 cmdbuf->buf += sz * 4;
309 cmdbuf->bufsz -= sz * 4;
315 * Emits a packet0 setting arbitrary registers.
316 * Called by r300_do_cp_cmdbuf.
318 * Note that checks are performed on contents and addresses of the registers
320 static __inline__ int r300_emit_packet0(drm_radeon_private_t * dev_priv,
321 drm_radeon_kcmd_buffer_t * cmdbuf,
322 drm_r300_cmd_header_t header)
328 sz = header.packet0.count;
329 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
334 if (sz * 4 > cmdbuf->bufsz)
335 return DRM_ERR(EINVAL);
337 if (reg + sz * 4 >= 0x10000) {
338 DRM_ERROR("No such registers in hardware reg=%04x sz=%d\n", reg,
340 return DRM_ERR(EINVAL);
343 if (r300_check_range(reg, sz)) {
344 /* go and check everything */
345 return r300_emit_carefully_checked_packet0(dev_priv, cmdbuf,
348 /* the rest of the data is safe to emit, whatever the values the user passed */
351 OUT_RING(CP_PACKET0(reg, sz - 1));
352 OUT_RING_TABLE((int *)cmdbuf->buf, sz);
355 cmdbuf->buf += sz * 4;
356 cmdbuf->bufsz -= sz * 4;
362 * Uploads user-supplied vertex program instructions or parameters onto
364 * Called by r300_do_cp_cmdbuf.
366 static __inline__ int r300_emit_vpu(drm_radeon_private_t * dev_priv,
367 drm_radeon_kcmd_buffer_t * cmdbuf,
368 drm_r300_cmd_header_t header)
374 sz = header.vpu.count;
375 addr = (header.vpu.adrhi << 8) | header.vpu.adrlo;
379 if (sz * 16 > cmdbuf->bufsz)
380 return DRM_ERR(EINVAL);
382 BEGIN_RING(5 + sz * 4);
383 /* Wait for VAP to come to senses.. */
384 /* there is no need to emit it multiple times, (only once before VAP is programmed,
385 but this optimization is for later */
386 OUT_RING_REG(R300_VAP_PVS_WAITIDLE, 0);
387 OUT_RING_REG(R300_VAP_PVS_UPLOAD_ADDRESS, addr);
388 OUT_RING(CP_PACKET0_TABLE(R300_VAP_PVS_UPLOAD_DATA, sz * 4 - 1));
389 OUT_RING_TABLE((int *)cmdbuf->buf, sz * 4);
393 cmdbuf->buf += sz * 16;
394 cmdbuf->bufsz -= sz * 16;
400 * Emit a clear packet from userspace.
401 * Called by r300_emit_packet3.
403 static __inline__ int r300_emit_clear(drm_radeon_private_t * dev_priv,
404 drm_radeon_kcmd_buffer_t * cmdbuf)
408 if (8 * 4 > cmdbuf->bufsz)
409 return DRM_ERR(EINVAL);
412 OUT_RING(CP_PACKET3(R200_3D_DRAW_IMMD_2, 8));
413 OUT_RING(R300_PRIM_TYPE_POINT | R300_PRIM_WALK_RING |
414 (1 << R300_PRIM_NUM_VERTICES_SHIFT));
415 OUT_RING_TABLE((int *)cmdbuf->buf, 8);
418 cmdbuf->buf += 8 * 4;
419 cmdbuf->bufsz -= 8 * 4;
424 static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t * dev_priv,
425 drm_radeon_kcmd_buffer_t * cmdbuf,
429 #define MAX_ARRAY_PACKET 64
430 u32 payload[MAX_ARRAY_PACKET];
434 count = (header >> 16) & 0x3fff;
436 if ((count + 1) > MAX_ARRAY_PACKET) {
437 DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
439 return DRM_ERR(EINVAL);
441 memset(payload, 0, MAX_ARRAY_PACKET * 4);
442 memcpy(payload, cmdbuf->buf + 4, (count + 1) * 4);
444 /* carefully check packet contents */
446 narrays = payload[0];
449 while ((k < narrays) && (i < (count + 1))) {
450 i++; /* skip attribute field */
451 if (r300_check_offset(dev_priv, payload[i])) {
453 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
455 return DRM_ERR(EINVAL);
461 /* have one more to process, they come in pairs */
462 if (r300_check_offset(dev_priv, payload[i])) {
464 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
466 return DRM_ERR(EINVAL);
471 /* do the counts match what we expect ? */
472 if ((k != narrays) || (i != (count + 1))) {
474 ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
475 k, i, narrays, count + 1);
476 return DRM_ERR(EINVAL);
479 /* all clear, output packet */
481 BEGIN_RING(count + 2);
483 OUT_RING_TABLE(payload, count + 1);
486 cmdbuf->buf += (count + 2) * 4;
487 cmdbuf->bufsz -= (count + 2) * 4;
492 static __inline__ int r300_emit_raw_packet3(drm_radeon_private_t * dev_priv,
493 drm_radeon_kcmd_buffer_t * cmdbuf)
499 if (4 > cmdbuf->bufsz)
500 return DRM_ERR(EINVAL);
502 /* Fixme !! This simply emits a packet without much checking.
503 We need to be smarter. */
505 /* obtain first word - actual packet3 header */
506 header = *(u32 *) cmdbuf->buf;
508 /* Is it packet 3 ? */
509 if ((header >> 30) != 0x3) {
510 DRM_ERROR("Not a packet3 header (0x%08x)\n", header);
511 return DRM_ERR(EINVAL);
514 count = (header >> 16) & 0x3fff;
516 /* Check again now that we know how much data to expect */
517 if ((count + 2) * 4 > cmdbuf->bufsz) {
519 ("Expected packet3 of length %d but have only %d bytes left\n",
520 (count + 2) * 4, cmdbuf->bufsz);
521 return DRM_ERR(EINVAL);
524 /* Is it a packet type we know about ? */
525 switch (header & 0xff00) {
526 case RADEON_3D_LOAD_VBPNTR: /* load vertex array pointers */
527 return r300_emit_3d_load_vbpntr(dev_priv, cmdbuf, header);
529 case RADEON_CP_3D_DRAW_IMMD_2: /* triggers drawing using in-packet vertex data */
530 case RADEON_CP_3D_DRAW_VBUF_2: /* triggers drawing of vertex buffers setup elsewhere */
531 case RADEON_CP_3D_DRAW_INDX_2: /* triggers drawing using indices to vertex buffer */
532 case RADEON_CP_INDX_BUFFER: /* DRAW_INDX_2 without INDX_BUFFER seems to lock up the gpu */
533 case RADEON_WAIT_FOR_IDLE:
535 /* these packets are safe */
538 DRM_ERROR("Unknown packet3 header (0x%08x)\n", header);
539 return DRM_ERR(EINVAL);
542 BEGIN_RING(count + 2);
544 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
547 cmdbuf->buf += (count + 2) * 4;
548 cmdbuf->bufsz -= (count + 2) * 4;
554 * Emit a rendering packet3 from userspace.
555 * Called by r300_do_cp_cmdbuf.
557 static __inline__ int r300_emit_packet3(drm_radeon_private_t * dev_priv,
558 drm_radeon_kcmd_buffer_t * cmdbuf,
559 drm_r300_cmd_header_t header)
563 char *orig_buf = cmdbuf->buf;
564 int orig_bufsz = cmdbuf->bufsz;
566 /* This is a do-while-loop so that we run the interior at least once,
567 * even if cmdbuf->nbox is 0. Compare r300_emit_cliprects for rationale.
571 if (cmdbuf->nbox > R300_SIMULTANEOUS_CLIPRECTS) {
572 ret = r300_emit_cliprects(dev_priv, cmdbuf, n);
576 cmdbuf->buf = orig_buf;
577 cmdbuf->bufsz = orig_bufsz;
580 switch (header.packet3.packet) {
581 case R300_CMD_PACKET3_CLEAR:
582 DRM_DEBUG("R300_CMD_PACKET3_CLEAR\n");
583 ret = r300_emit_clear(dev_priv, cmdbuf);
585 DRM_ERROR("r300_emit_clear failed\n");
590 case R300_CMD_PACKET3_RAW:
591 DRM_DEBUG("R300_CMD_PACKET3_RAW\n");
592 ret = r300_emit_raw_packet3(dev_priv, cmdbuf);
594 DRM_ERROR("r300_emit_raw_packet3 failed\n");
600 DRM_ERROR("bad packet3 type %i at %p\n",
601 header.packet3.packet,
602 cmdbuf->buf - sizeof(header));
603 return DRM_ERR(EINVAL);
606 n += R300_SIMULTANEOUS_CLIPRECTS;
607 } while (n < cmdbuf->nbox);
612 /* Some of the R300 chips seem to be extremely touchy about the two registers
613 * that are configured in r300_pacify.
614 * Among the worst offenders seems to be the R300 ND (0x4E44): When userspace
615 * sends a command buffer that contains only state setting commands and a
616 * vertex program/parameter upload sequence, this will eventually lead to a
617 * lockup, unless the sequence is bracketed by calls to r300_pacify.
618 * So we should take great care to *always* call r300_pacify before
619 * *anything* 3D related, and again afterwards. This is what the
620 * call bracket in r300_do_cp_cmdbuf is for.
624 * Emit the sequence to pacify R300.
626 static __inline__ void r300_pacify(drm_radeon_private_t * dev_priv)
631 OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
633 OUT_RING(CP_PACKET0(0x4f18, 0));
635 OUT_RING(CP_PACKET3(RADEON_CP_NOP, 0));
641 * Called by r300_do_cp_cmdbuf to update the internal buffer age and state.
642 * The actual age emit is done by r300_do_cp_cmdbuf, which is why you must
643 * be careful about how this function is called.
645 static void r300_discard_buffer(drm_device_t * dev, drm_buf_t * buf)
647 drm_radeon_private_t *dev_priv = dev->dev_private;
648 drm_radeon_buf_priv_t *buf_priv = buf->dev_private;
650 buf_priv->age = ++dev_priv->sarea_priv->last_dispatch;
656 * Parses and validates a user-supplied command buffer and emits appropriate
657 * commands on the DMA ring buffer.
658 * Called by the ioctl handler function radeon_cp_cmdbuf.
660 int r300_do_cp_cmdbuf(drm_device_t * dev,
662 drm_file_t * filp_priv, drm_radeon_kcmd_buffer_t * cmdbuf)
664 drm_radeon_private_t *dev_priv = dev->dev_private;
665 drm_device_dma_t *dma = dev->dma;
666 drm_buf_t *buf = NULL;
667 int emit_dispatch_age = 0;
672 /* See the comment above r300_emit_begin3d for why this call must be here,
673 * and what the cleanup gotos are for. */
674 r300_pacify(dev_priv);
676 if (cmdbuf->nbox <= R300_SIMULTANEOUS_CLIPRECTS) {
677 ret = r300_emit_cliprects(dev_priv, cmdbuf, 0);
682 while (cmdbuf->bufsz >= sizeof(drm_r300_cmd_header_t)) {
684 drm_r300_cmd_header_t header;
686 header.u = *(unsigned int *)cmdbuf->buf;
688 cmdbuf->buf += sizeof(header);
689 cmdbuf->bufsz -= sizeof(header);
691 switch (header.header.cmd_type) {
692 case R300_CMD_PACKET0:
693 DRM_DEBUG("R300_CMD_PACKET0\n");
694 ret = r300_emit_packet0(dev_priv, cmdbuf, header);
696 DRM_ERROR("r300_emit_packet0 failed\n");
702 DRM_DEBUG("R300_CMD_VPU\n");
703 ret = r300_emit_vpu(dev_priv, cmdbuf, header);
705 DRM_ERROR("r300_emit_vpu failed\n");
710 case R300_CMD_PACKET3:
711 DRM_DEBUG("R300_CMD_PACKET3\n");
712 ret = r300_emit_packet3(dev_priv, cmdbuf, header);
714 DRM_ERROR("r300_emit_packet3 failed\n");
720 DRM_DEBUG("R300_CMD_END3D\n");
722 Ideally userspace driver should not need to issue this call,
723 i.e. the drm driver should issue it automatically and prevent
726 In practice, we do not understand why this call is needed and what
727 it does (except for some vague guesses that it has to do with cache
728 coherence) and so the user space driver does it.
730 Once we are sure which uses prevent lockups the code could be moved
731 into the kernel and the userspace driver will not
732 need to use this command.
734 Note that issuing this command does not hurt anything
735 except, possibly, performance */
736 r300_pacify(dev_priv);
739 case R300_CMD_CP_DELAY:
740 /* simple enough, we can do it here */
741 DRM_DEBUG("R300_CMD_CP_DELAY\n");
746 BEGIN_RING(header.delay.count);
747 for (i = 0; i < header.delay.count; i++)
748 OUT_RING(RADEON_CP_PACKET2);
753 case R300_CMD_DMA_DISCARD:
754 DRM_DEBUG("RADEON_CMD_DMA_DISCARD\n");
755 idx = header.dma.buf_idx;
756 if (idx < 0 || idx >= dma->buf_count) {
757 DRM_ERROR("buffer index %d (of %d max)\n",
758 idx, dma->buf_count - 1);
759 ret = DRM_ERR(EINVAL);
763 buf = dma->buflist[idx];
764 if (buf->filp != filp || buf->pending) {
765 DRM_ERROR("bad buffer %p %p %d\n",
766 buf->filp, filp, buf->pending);
767 ret = DRM_ERR(EINVAL);
771 emit_dispatch_age = 1;
772 r300_discard_buffer(dev, buf);
776 /* simple enough, we can do it here */
777 DRM_DEBUG("R300_CMD_WAIT\n");
778 if (header.wait.flags == 0)
779 break; /* nothing to do */
785 OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
786 OUT_RING((header.wait.flags & 0xf) << 14);
792 DRM_ERROR("bad cmd_type %i at %p\n",
793 header.header.cmd_type,
794 cmdbuf->buf - sizeof(header));
795 ret = DRM_ERR(EINVAL);
803 r300_pacify(dev_priv);
805 /* We emit the vertex buffer age here, outside the pacifier "brackets"
807 * (1) This may coalesce multiple age emissions into a single one and
808 * (2) more importantly, some chips lock up hard when scratch registers
809 * are written inside the pacifier bracket.
811 if (emit_dispatch_age) {
814 /* Emit the vertex buffer age */
816 RADEON_DISPATCH_AGE(dev_priv->sarea_priv->last_dispatch);