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 ADD_RANGE(R300_TX_PITCH_0, 16);
220 /* Texture offset is dangerous and needs more checking */
221 ADD_RANGE_MARK(R300_TX_OFFSET_0, 16, MARK_CHECK_OFFSET);
222 ADD_RANGE(R300_TX_UNK4_0, 16);
223 ADD_RANGE(R300_TX_BORDER_COLOR_0, 16);
225 /* Sporadic registers used as primitives are emitted */
226 ADD_RANGE(0x4f18, 1);
227 ADD_RANGE(R300_RB3D_DSTCACHE_CTLSTAT, 1);
228 ADD_RANGE(R300_VAP_INPUT_ROUTE_0_0, 8);
229 ADD_RANGE(R300_VAP_INPUT_ROUTE_1_0, 8);
233 static __inline__ int r300_check_range(unsigned reg, int count)
238 for (i = (reg >> 2); i < (reg >> 2) + count; i++)
239 if (r300_reg_flags[i] != MARK_SAFE)
244 /* we expect offsets passed to the framebuffer to be either within video memory or
246 static __inline__ int r300_check_offset(drm_radeon_private_t *dev_priv,
249 /* we realy want to check against end of video aperture
250 but this value is not being kept.
251 This code is correct for now (does the same thing as the
252 code that sets MC_FB_LOCATION) in radeon_cp.c */
253 if ((offset >= dev_priv->fb_location) &&
254 (offset < dev_priv->gart_vm_start))
256 if ((offset >= dev_priv->gart_vm_start) &&
257 (offset < dev_priv->gart_vm_start + dev_priv->gart_size))
262 static __inline__ int r300_emit_carefully_checked_packet0(drm_radeon_private_t *
264 drm_radeon_kcmd_buffer_t
266 drm_r300_cmd_header_t
275 sz = header.packet0.count;
276 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
278 if ((sz > 64) || (sz < 0)) {
280 ("Cannot emit more than 64 values at a time (reg=%04x sz=%d)\n",
282 return DRM_ERR(EINVAL);
284 for (i = 0; i < sz; i++) {
285 values[i] = ((int *)cmdbuf->buf)[i];
286 switch (r300_reg_flags[(reg >> 2) + i]) {
289 case MARK_CHECK_OFFSET:
290 if (r300_check_offset(dev_priv, (u32) values[i])) {
292 ("Offset failed range check (reg=%04x sz=%d)\n",
294 return DRM_ERR(EINVAL);
298 DRM_ERROR("Register %04x failed check as flag=%02x\n",
299 reg + i * 4, r300_reg_flags[(reg >> 2) + i]);
300 return DRM_ERR(EINVAL);
305 OUT_RING(CP_PACKET0(reg, sz - 1));
306 OUT_RING_TABLE(values, sz);
309 cmdbuf->buf += sz * 4;
310 cmdbuf->bufsz -= sz * 4;
316 * Emits a packet0 setting arbitrary registers.
317 * Called by r300_do_cp_cmdbuf.
319 * Note that checks are performed on contents and addresses of the registers
321 static __inline__ int r300_emit_packet0(drm_radeon_private_t *dev_priv,
322 drm_radeon_kcmd_buffer_t *cmdbuf,
323 drm_r300_cmd_header_t header)
329 sz = header.packet0.count;
330 reg = (header.packet0.reghi << 8) | header.packet0.reglo;
335 if (sz * 4 > cmdbuf->bufsz)
336 return DRM_ERR(EINVAL);
338 if (reg + sz * 4 >= 0x10000) {
339 DRM_ERROR("No such registers in hardware reg=%04x sz=%d\n", reg,
341 return DRM_ERR(EINVAL);
344 if (r300_check_range(reg, sz)) {
345 /* go and check everything */
346 return r300_emit_carefully_checked_packet0(dev_priv, cmdbuf,
349 /* the rest of the data is safe to emit, whatever the values the user passed */
352 OUT_RING(CP_PACKET0(reg, sz - 1));
353 OUT_RING_TABLE((int *)cmdbuf->buf, sz);
356 cmdbuf->buf += sz * 4;
357 cmdbuf->bufsz -= sz * 4;
363 * Uploads user-supplied vertex program instructions or parameters onto
365 * Called by r300_do_cp_cmdbuf.
367 static __inline__ int r300_emit_vpu(drm_radeon_private_t *dev_priv,
368 drm_radeon_kcmd_buffer_t *cmdbuf,
369 drm_r300_cmd_header_t header)
375 sz = header.vpu.count;
376 addr = (header.vpu.adrhi << 8) | header.vpu.adrlo;
380 if (sz * 16 > cmdbuf->bufsz)
381 return DRM_ERR(EINVAL);
383 BEGIN_RING(5 + sz * 4);
384 /* Wait for VAP to come to senses.. */
385 /* there is no need to emit it multiple times, (only once before VAP is programmed,
386 but this optimization is for later */
387 OUT_RING_REG(R300_VAP_PVS_WAITIDLE, 0);
388 OUT_RING_REG(R300_VAP_PVS_UPLOAD_ADDRESS, addr);
389 OUT_RING(CP_PACKET0_TABLE(R300_VAP_PVS_UPLOAD_DATA, sz * 4 - 1));
390 OUT_RING_TABLE((int *)cmdbuf->buf, sz * 4);
394 cmdbuf->buf += sz * 16;
395 cmdbuf->bufsz -= sz * 16;
401 * Emit a clear packet from userspace.
402 * Called by r300_emit_packet3.
404 static __inline__ int r300_emit_clear(drm_radeon_private_t *dev_priv,
405 drm_radeon_kcmd_buffer_t *cmdbuf)
409 if (8 * 4 > cmdbuf->bufsz)
410 return DRM_ERR(EINVAL);
413 OUT_RING(CP_PACKET3(R200_3D_DRAW_IMMD_2, 8));
414 OUT_RING(R300_PRIM_TYPE_POINT | R300_PRIM_WALK_RING |
415 (1 << R300_PRIM_NUM_VERTICES_SHIFT));
416 OUT_RING_TABLE((int *)cmdbuf->buf, 8);
419 cmdbuf->buf += 8 * 4;
420 cmdbuf->bufsz -= 8 * 4;
425 static __inline__ int r300_emit_3d_load_vbpntr(drm_radeon_private_t *dev_priv,
426 drm_radeon_kcmd_buffer_t *cmdbuf,
430 #define MAX_ARRAY_PACKET 64
431 u32 payload[MAX_ARRAY_PACKET];
435 count = (header >> 16) & 0x3fff;
437 if ((count + 1) > MAX_ARRAY_PACKET) {
438 DRM_ERROR("Too large payload in 3D_LOAD_VBPNTR (count=%d)\n",
440 return DRM_ERR(EINVAL);
442 memset(payload, 0, MAX_ARRAY_PACKET * 4);
443 memcpy(payload, cmdbuf->buf + 4, (count + 1) * 4);
445 /* carefully check packet contents */
447 narrays = payload[0];
450 while ((k < narrays) && (i < (count + 1))) {
451 i++; /* skip attribute field */
452 if (r300_check_offset(dev_priv, payload[i])) {
454 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
456 return DRM_ERR(EINVAL);
462 /* have one more to process, they come in pairs */
463 if (r300_check_offset(dev_priv, payload[i])) {
465 ("Offset failed range check (k=%d i=%d) while processing 3D_LOAD_VBPNTR packet.\n",
467 return DRM_ERR(EINVAL);
472 /* do the counts match what we expect ? */
473 if ((k != narrays) || (i != (count + 1))) {
475 ("Malformed 3D_LOAD_VBPNTR packet (k=%d i=%d narrays=%d count+1=%d).\n",
476 k, i, narrays, count + 1);
477 return DRM_ERR(EINVAL);
480 /* all clear, output packet */
482 BEGIN_RING(count + 2);
484 OUT_RING_TABLE(payload, count + 1);
487 cmdbuf->buf += (count + 2) * 4;
488 cmdbuf->bufsz -= (count + 2) * 4;
493 static __inline__ int r300_emit_raw_packet3(drm_radeon_private_t *dev_priv,
494 drm_radeon_kcmd_buffer_t *cmdbuf)
500 if (4 > cmdbuf->bufsz)
501 return DRM_ERR(EINVAL);
503 /* Fixme !! This simply emits a packet without much checking.
504 We need to be smarter. */
506 /* obtain first word - actual packet3 header */
507 header = *(u32 *) cmdbuf->buf;
509 /* Is it packet 3 ? */
510 if ((header >> 30) != 0x3) {
511 DRM_ERROR("Not a packet3 header (0x%08x)\n", header);
512 return DRM_ERR(EINVAL);
515 count = (header >> 16) & 0x3fff;
517 /* Check again now that we know how much data to expect */
518 if ((count + 2) * 4 > cmdbuf->bufsz) {
520 ("Expected packet3 of length %d but have only %d bytes left\n",
521 (count + 2) * 4, cmdbuf->bufsz);
522 return DRM_ERR(EINVAL);
525 /* Is it a packet type we know about ? */
526 switch (header & 0xff00) {
527 case RADEON_3D_LOAD_VBPNTR: /* load vertex array pointers */
528 return r300_emit_3d_load_vbpntr(dev_priv, cmdbuf, header);
530 case RADEON_CP_3D_DRAW_IMMD_2: /* triggers drawing using in-packet vertex data */
531 case RADEON_CP_3D_DRAW_VBUF_2: /* triggers drawing of vertex buffers setup elsewhere */
532 case RADEON_CP_3D_DRAW_INDX_2: /* triggers drawing using indices to vertex buffer */
533 case RADEON_CP_INDX_BUFFER: /* DRAW_INDX_2 without INDX_BUFFER seems to lock up the gpu */
534 case RADEON_WAIT_FOR_IDLE:
536 /* these packets are safe */
539 DRM_ERROR("Unknown packet3 header (0x%08x)\n", header);
540 return DRM_ERR(EINVAL);
543 BEGIN_RING(count + 2);
545 OUT_RING_TABLE((int *)(cmdbuf->buf + 4), count + 1);
548 cmdbuf->buf += (count + 2) * 4;
549 cmdbuf->bufsz -= (count + 2) * 4;
555 * Emit a rendering packet3 from userspace.
556 * Called by r300_do_cp_cmdbuf.
558 static __inline__ int r300_emit_packet3(drm_radeon_private_t *dev_priv,
559 drm_radeon_kcmd_buffer_t *cmdbuf,
560 drm_r300_cmd_header_t header)
564 char *orig_buf = cmdbuf->buf;
565 int orig_bufsz = cmdbuf->bufsz;
567 /* This is a do-while-loop so that we run the interior at least once,
568 * even if cmdbuf->nbox is 0. Compare r300_emit_cliprects for rationale.
572 if (cmdbuf->nbox > R300_SIMULTANEOUS_CLIPRECTS) {
573 ret = r300_emit_cliprects(dev_priv, cmdbuf, n);
577 cmdbuf->buf = orig_buf;
578 cmdbuf->bufsz = orig_bufsz;
581 switch (header.packet3.packet) {
582 case R300_CMD_PACKET3_CLEAR:
583 DRM_DEBUG("R300_CMD_PACKET3_CLEAR\n");
584 ret = r300_emit_clear(dev_priv, cmdbuf);
586 DRM_ERROR("r300_emit_clear failed\n");
591 case R300_CMD_PACKET3_RAW:
592 DRM_DEBUG("R300_CMD_PACKET3_RAW\n");
593 ret = r300_emit_raw_packet3(dev_priv, cmdbuf);
595 DRM_ERROR("r300_emit_raw_packet3 failed\n");
601 DRM_ERROR("bad packet3 type %i at %p\n",
602 header.packet3.packet,
603 cmdbuf->buf - sizeof(header));
604 return DRM_ERR(EINVAL);
607 n += R300_SIMULTANEOUS_CLIPRECTS;
608 } while (n < cmdbuf->nbox);
613 /* Some of the R300 chips seem to be extremely touchy about the two registers
614 * that are configured in r300_pacify.
615 * Among the worst offenders seems to be the R300 ND (0x4E44): When userspace
616 * sends a command buffer that contains only state setting commands and a
617 * vertex program/parameter upload sequence, this will eventually lead to a
618 * lockup, unless the sequence is bracketed by calls to r300_pacify.
619 * So we should take great care to *always* call r300_pacify before
620 * *anything* 3D related, and again afterwards. This is what the
621 * call bracket in r300_do_cp_cmdbuf is for.
625 * Emit the sequence to pacify R300.
627 static __inline__ void r300_pacify(drm_radeon_private_t *dev_priv)
632 OUT_RING(CP_PACKET0(R300_RB3D_DSTCACHE_CTLSTAT, 0));
634 OUT_RING(CP_PACKET0(0x4f18, 0));
636 OUT_RING(CP_PACKET3(RADEON_CP_NOP, 0));
642 * Called by r300_do_cp_cmdbuf to update the internal buffer age and state.
643 * The actual age emit is done by r300_do_cp_cmdbuf, which is why you must
644 * be careful about how this function is called.
646 static void r300_discard_buffer(drm_device_t * dev, drm_buf_t * buf)
648 drm_radeon_private_t *dev_priv = dev->dev_private;
649 drm_radeon_buf_priv_t *buf_priv = buf->dev_private;
651 buf_priv->age = ++dev_priv->sarea_priv->last_dispatch;
657 * Parses and validates a user-supplied command buffer and emits appropriate
658 * commands on the DMA ring buffer.
659 * Called by the ioctl handler function radeon_cp_cmdbuf.
661 int r300_do_cp_cmdbuf(drm_device_t *dev,
663 drm_file_t *filp_priv,
664 drm_radeon_kcmd_buffer_t *cmdbuf)
666 drm_radeon_private_t *dev_priv = dev->dev_private;
667 drm_device_dma_t *dma = dev->dma;
668 drm_buf_t *buf = NULL;
669 int emit_dispatch_age = 0;
674 /* See the comment above r300_emit_begin3d for why this call must be here,
675 * and what the cleanup gotos are for. */
676 r300_pacify(dev_priv);
678 if (cmdbuf->nbox <= R300_SIMULTANEOUS_CLIPRECTS) {
679 ret = r300_emit_cliprects(dev_priv, cmdbuf, 0);
684 while (cmdbuf->bufsz >= sizeof(drm_r300_cmd_header_t)) {
686 drm_r300_cmd_header_t header;
688 header.u = *(unsigned int *)cmdbuf->buf;
690 cmdbuf->buf += sizeof(header);
691 cmdbuf->bufsz -= sizeof(header);
693 switch (header.header.cmd_type) {
694 case R300_CMD_PACKET0:
695 DRM_DEBUG("R300_CMD_PACKET0\n");
696 ret = r300_emit_packet0(dev_priv, cmdbuf, header);
698 DRM_ERROR("r300_emit_packet0 failed\n");
704 DRM_DEBUG("R300_CMD_VPU\n");
705 ret = r300_emit_vpu(dev_priv, cmdbuf, header);
707 DRM_ERROR("r300_emit_vpu failed\n");
712 case R300_CMD_PACKET3:
713 DRM_DEBUG("R300_CMD_PACKET3\n");
714 ret = r300_emit_packet3(dev_priv, cmdbuf, header);
716 DRM_ERROR("r300_emit_packet3 failed\n");
722 DRM_DEBUG("R300_CMD_END3D\n");
724 Ideally userspace driver should not need to issue this call,
725 i.e. the drm driver should issue it automatically and prevent
728 In practice, we do not understand why this call is needed and what
729 it does (except for some vague guesses that it has to do with cache
730 coherence) and so the user space driver does it.
732 Once we are sure which uses prevent lockups the code could be moved
733 into the kernel and the userspace driver will not
734 need to use this command.
736 Note that issuing this command does not hurt anything
737 except, possibly, performance */
738 r300_pacify(dev_priv);
741 case R300_CMD_CP_DELAY:
742 /* simple enough, we can do it here */
743 DRM_DEBUG("R300_CMD_CP_DELAY\n");
748 BEGIN_RING(header.delay.count);
749 for (i = 0; i < header.delay.count; i++)
750 OUT_RING(RADEON_CP_PACKET2);
755 case R300_CMD_DMA_DISCARD:
756 DRM_DEBUG("RADEON_CMD_DMA_DISCARD\n");
757 idx = header.dma.buf_idx;
758 if (idx < 0 || idx >= dma->buf_count) {
759 DRM_ERROR("buffer index %d (of %d max)\n",
760 idx, dma->buf_count - 1);
761 ret = DRM_ERR(EINVAL);
765 buf = dma->buflist[idx];
766 if (buf->filp != filp || buf->pending) {
767 DRM_ERROR("bad buffer %p %p %d\n",
768 buf->filp, filp, buf->pending);
769 ret = DRM_ERR(EINVAL);
773 emit_dispatch_age = 1;
774 r300_discard_buffer(dev, buf);
778 /* simple enough, we can do it here */
779 DRM_DEBUG("R300_CMD_WAIT\n");
780 if (header.wait.flags == 0)
781 break; /* nothing to do */
787 OUT_RING(CP_PACKET0(RADEON_WAIT_UNTIL, 0));
788 OUT_RING((header.wait.flags & 0xf) << 14);
794 DRM_ERROR("bad cmd_type %i at %p\n",
795 header.header.cmd_type,
796 cmdbuf->buf - sizeof(header));
797 ret = DRM_ERR(EINVAL);
805 r300_pacify(dev_priv);
807 /* We emit the vertex buffer age here, outside the pacifier "brackets"
809 * (1) This may coalesce multiple age emissions into a single one and
810 * (2) more importantly, some chips lock up hard when scratch registers
811 * are written inside the pacifier bracket.
813 if (emit_dispatch_age) {
816 /* Emit the vertex buffer age */
818 RADEON_DISPATCH_AGE(dev_priv->sarea_priv->last_dispatch);