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drm/i915: Use batch pools with the command parser
[linux-2.6-block.git] / drivers / gpu / drm / i915 / i915_cmd_parser.c
CommitLineData
351e3db2
BV		 1/*
2 * Copyright © 2013 Intel Corporation
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 (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Brad Volkin <bradley.d.volkin@intel.com>
25 *
26 */
27
28#include "i915_drv.h"
29
30/**
122b2505 31 * DOC: batch buffer command parser
351e3db2
BV		 32 *
33 * Motivation:
34 * Certain OpenGL features (e.g. transform feedback, performance monitoring)
35 * require userspace code to submit batches containing commands such as
36 * MI_LOAD_REGISTER_IMM to access various registers. Unfortunately, some
37 * generations of the hardware will noop these commands in "unsecure" batches
38 * (which includes all userspace batches submitted via i915) even though the
39 * commands may be safe and represent the intended programming model of the
40 * device.
41 *
42 * The software command parser is similar in operation to the command parsing
43 * done in hardware for unsecure batches. However, the software parser allows
44 * some operations that would be noop'd by hardware, if the parser determines
45 * the operation is safe, and submits the batch as "secure" to prevent hardware
46 * parsing.
47 *
48 * Threats:
49 * At a high level, the hardware (and software) checks attempt to prevent
50 * granting userspace undue privileges. There are three categories of privilege.
51 *
52 * First, commands which are explicitly defined as privileged or which should
53 * only be used by the kernel driver. The parser generally rejects such
54 * commands, though it may allow some from the drm master process.
55 *
56 * Second, commands which access registers. To support correct/enhanced
57 * userspace functionality, particularly certain OpenGL extensions, the parser
58 * provides a whitelist of registers which userspace may safely access (for both
59 * normal and drm master processes).
60 *
61 * Third, commands which access privileged memory (i.e. GGTT, HWS page, etc).
62 * The parser always rejects such commands.
63 *
64 * The majority of the problematic commands fall in the MI_* range, with only a
65 * few specific commands on each ring (e.g. PIPE_CONTROL and MI_FLUSH_DW).
66 *
67 * Implementation:
68 * Each ring maintains tables of commands and registers which the parser uses in
69 * scanning batch buffers submitted to that ring.
70 *
71 * Since the set of commands that the parser must check for is significantly
72 * smaller than the number of commands supported, the parser tables contain only
73 * those commands required by the parser. This generally works because command
74 * opcode ranges have standard command length encodings. So for commands that
75 * the parser does not need to check, it can easily skip them. This is
32197aab 76 * implemented via a per-ring length decoding vfunc.
351e3db2
BV		 77 *
78 * Unfortunately, there are a number of commands that do not follow the standard
79 * length encoding for their opcode range, primarily amongst the MI_* commands.
80 * To handle this, the parser provides a way to define explicit "skip" entries
81 * in the per-ring command tables.
82 *
83 * Other command table entries map fairly directly to high level categories
84 * mentioned above: rejected, master-only, register whitelist. The parser
85 * implements a number of checks, including the privileged memory checks, via a
86 * general bitmasking mechanism.
87 */
88
3a6fa984
BV		 89#define STD_MI_OPCODE_MASK 0xFF800000
90#define STD_3D_OPCODE_MASK 0xFFFF0000
91#define STD_2D_OPCODE_MASK 0xFFC00000
92#define STD_MFX_OPCODE_MASK 0xFFFF0000
93
94#define CMD(op, opm, f, lm, fl, ...) \
95 { \
96 .flags = (fl) | ((f) ? CMD_DESC_FIXED : 0), \
97 .cmd = { (op), (opm) }, \
98 .length = { (lm) }, \
99 __VA_ARGS__ \
100 }
101
102/* Convenience macros to compress the tables */
103#define SMI STD_MI_OPCODE_MASK
104#define S3D STD_3D_OPCODE_MASK
105#define S2D STD_2D_OPCODE_MASK
106#define SMFX STD_MFX_OPCODE_MASK
107#define F true
108#define S CMD_DESC_SKIP
109#define R CMD_DESC_REJECT
110#define W CMD_DESC_REGISTER
111#define B CMD_DESC_BITMASK
112#define M CMD_DESC_MASTER
113
114/* Command Mask Fixed Len Action
115 ---------------------------------------------------------- */
116static const struct drm_i915_cmd_descriptor common_cmds[] = {
117 CMD( MI_NOOP, SMI, F, 1, S ),
b18b396b 118 CMD( MI_USER_INTERRUPT, SMI, F, 1, R ),
17c1eb15 119 CMD( MI_WAIT_FOR_EVENT, SMI, F, 1, M ),
3a6fa984
BV		 120 CMD( MI_ARB_CHECK, SMI, F, 1, S ),
121 CMD( MI_REPORT_HEAD, SMI, F, 1, S ),
122 CMD( MI_SUSPEND_FLUSH, SMI, F, 1, S ),
9c640d1d
BV		 123 CMD( MI_SEMAPHORE_MBOX, SMI, !F, 0xFF, R ),
124 CMD( MI_STORE_DWORD_INDEX, SMI, !F, 0xFF, R ),
f0a346bd
BV		 125 CMD( MI_LOAD_REGISTER_IMM(1), SMI, !F, 0xFF, W,
126 .reg = { .offset = 1, .mask = 0x007FFFFC } ),
d4d48035
BV		 127 CMD( MI_STORE_REGISTER_MEM(1), SMI, !F, 0xFF, W | B,
128 .reg = { .offset = 1, .mask = 0x007FFFFC },
129 .bits = {{
130 .offset = 0,
131 .mask = MI_GLOBAL_GTT,
132 .expected = 0,
133 }}, ),
134 CMD( MI_LOAD_REGISTER_MEM, SMI, !F, 0xFF, W | B,
135 .reg = { .offset = 1, .mask = 0x007FFFFC },
136 .bits = {{
137 .offset = 0,
138 .mask = MI_GLOBAL_GTT,
139 .expected = 0,
140 }}, ),
42c7156a
BV		 141 /*
142 * MI_BATCH_BUFFER_START requires some special handling. It's not
143 * really a 'skip' action but it doesn't seem like it's worth adding
144 * a new action. See i915_parse_cmds().
145 */
3a6fa984
BV		 146 CMD( MI_BATCH_BUFFER_START, SMI, !F, 0xFF, S ),
147};
148
149static const struct drm_i915_cmd_descriptor render_cmds[] = {
150 CMD( MI_FLUSH, SMI, F, 1, S ),
9c640d1d 151 CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
3a6fa984
BV		 152 CMD( MI_PREDICATE, SMI, F, 1, S ),
153 CMD( MI_TOPOLOGY_FILTER, SMI, F, 1, S ),
9c640d1d 154 CMD( MI_DISPLAY_FLIP, SMI, !F, 0xFF, R ),
86ef630d 155 CMD( MI_SET_APPID, SMI, F, 1, S ),
9c640d1d 156 CMD( MI_SET_CONTEXT, SMI, !F, 0xFF, R ),
3a6fa984 157 CMD( MI_URB_CLEAR, SMI, !F, 0xFF, S ),
d4d48035
BV		 158 CMD( MI_STORE_DWORD_IMM, SMI, !F, 0x3F, B,
159 .bits = {{
160 .offset = 0,
161 .mask = MI_GLOBAL_GTT,
162 .expected = 0,
163 }}, ),
9c640d1d 164 CMD( MI_UPDATE_GTT, SMI, !F, 0xFF, R ),
d4d48035
BV		 165 CMD( MI_CLFLUSH, SMI, !F, 0x3FF, B,
166 .bits = {{
167 .offset = 0,
168 .mask = MI_GLOBAL_GTT,
169 .expected = 0,
170 }}, ),
171 CMD( MI_REPORT_PERF_COUNT, SMI, !F, 0x3F, B,
172 .bits = {{
173 .offset = 1,
174 .mask = MI_REPORT_PERF_COUNT_GGTT,
175 .expected = 0,
176 }}, ),
177 CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
178 .bits = {{
179 .offset = 0,
180 .mask = MI_GLOBAL_GTT,
181 .expected = 0,
182 }}, ),
3a6fa984
BV		 183 CMD( GFX_OP_3DSTATE_VF_STATISTICS, S3D, F, 1, S ),
184 CMD( PIPELINE_SELECT, S3D, F, 1, S ),
f0a346bd
BV		 185 CMD( MEDIA_VFE_STATE, S3D, !F, 0xFFFF, B,
186 .bits = {{
187 .offset = 2,
188 .mask = MEDIA_VFE_STATE_MMIO_ACCESS_MASK,
189 .expected = 0,
190 }}, ),
3a6fa984
BV		 191 CMD( GPGPU_OBJECT, S3D, !F, 0xFF, S ),
192 CMD( GPGPU_WALKER, S3D, !F, 0xFF, S ),
193 CMD( GFX_OP_3DSTATE_SO_DECL_LIST, S3D, !F, 0x1FF, S ),
f0a346bd
BV		 194 CMD( GFX_OP_PIPE_CONTROL(5), S3D, !F, 0xFF, B,
195 .bits = {{
196 .offset = 1,
b18b396b 197 .mask = (PIPE_CONTROL_MMIO_WRITE | PIPE_CONTROL_NOTIFY),
f0a346bd 198 .expected = 0,
d4d48035
BV		 199 },
200 {
201 .offset = 1,
114d4f70
BV		 202 .mask = (PIPE_CONTROL_GLOBAL_GTT_IVB |
203 PIPE_CONTROL_STORE_DATA_INDEX),
d4d48035
BV		 204 .expected = 0,
205 .condition_offset = 1,
206 .condition_mask = PIPE_CONTROL_POST_SYNC_OP_MASK,
f0a346bd 207 }}, ),
3a6fa984
BV		 208};
209
210static const struct drm_i915_cmd_descriptor hsw_render_cmds[] = {
211 CMD( MI_SET_PREDICATE, SMI, F, 1, S ),
212 CMD( MI_RS_CONTROL, SMI, F, 1, S ),
213 CMD( MI_URB_ATOMIC_ALLOC, SMI, F, 1, S ),
86ef630d 214 CMD( MI_SET_APPID, SMI, F, 1, S ),
3a6fa984 215 CMD( MI_RS_CONTEXT, SMI, F, 1, S ),
17c1eb15 216 CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
9c640d1d
BV		 217 CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
218 CMD( MI_LOAD_REGISTER_REG, SMI, !F, 0xFF, R ),
3a6fa984
BV		 219 CMD( MI_RS_STORE_DATA_IMM, SMI, !F, 0xFF, S ),
220 CMD( MI_LOAD_URB_MEM, SMI, !F, 0xFF, S ),
221 CMD( MI_STORE_URB_MEM, SMI, !F, 0xFF, S ),
222 CMD( GFX_OP_3DSTATE_DX9_CONSTANTF_VS, S3D, !F, 0x7FF, S ),
223 CMD( GFX_OP_3DSTATE_DX9_CONSTANTF_PS, S3D, !F, 0x7FF, S ),
224
225 CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_VS, S3D, !F, 0x1FF, S ),
226 CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_GS, S3D, !F, 0x1FF, S ),
227 CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_HS, S3D, !F, 0x1FF, S ),
228 CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_DS, S3D, !F, 0x1FF, S ),
229 CMD( GFX_OP_3DSTATE_BINDING_TABLE_EDIT_PS, S3D, !F, 0x1FF, S ),
230};
231
232static const struct drm_i915_cmd_descriptor video_cmds[] = {
9c640d1d 233 CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
86ef630d 234 CMD( MI_SET_APPID, SMI, F, 1, S ),
d4d48035
BV		 235 CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, B,
236 .bits = {{
237 .offset = 0,
238 .mask = MI_GLOBAL_GTT,
239 .expected = 0,
240 }}, ),
9c640d1d 241 CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
b18b396b
BV		 242 CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
243 .bits = {{
244 .offset = 0,
245 .mask = MI_FLUSH_DW_NOTIFY,
246 .expected = 0,
d4d48035
BV		 247 },
248 {
249 .offset = 1,
250 .mask = MI_FLUSH_DW_USE_GTT,
251 .expected = 0,
252 .condition_offset = 0,
253 .condition_mask = MI_FLUSH_DW_OP_MASK,
114d4f70
BV		 254 },
255 {
256 .offset = 0,
257 .mask = MI_FLUSH_DW_STORE_INDEX,
258 .expected = 0,
259 .condition_offset = 0,
260 .condition_mask = MI_FLUSH_DW_OP_MASK,
d4d48035
BV		 261 }}, ),
262 CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
263 .bits = {{
264 .offset = 0,
265 .mask = MI_GLOBAL_GTT,
266 .expected = 0,
b18b396b 267 }}, ),
3a6fa984
BV		 268 /*
269 * MFX_WAIT doesn't fit the way we handle length for most commands.
270 * It has a length field but it uses a non-standard length bias.
271 * It is always 1 dword though, so just treat it as fixed length.
272 */
273 CMD( MFX_WAIT, SMFX, F, 1, S ),
274};
275
276static const struct drm_i915_cmd_descriptor vecs_cmds[] = {
9c640d1d 277 CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
86ef630d 278 CMD( MI_SET_APPID, SMI, F, 1, S ),
d4d48035
BV		 279 CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, B,
280 .bits = {{
281 .offset = 0,
282 .mask = MI_GLOBAL_GTT,
283 .expected = 0,
284 }}, ),
9c640d1d 285 CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
b18b396b
BV		 286 CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
287 .bits = {{
288 .offset = 0,
289 .mask = MI_FLUSH_DW_NOTIFY,
290 .expected = 0,
d4d48035
BV		 291 },
292 {
293 .offset = 1,
294 .mask = MI_FLUSH_DW_USE_GTT,
295 .expected = 0,
296 .condition_offset = 0,
297 .condition_mask = MI_FLUSH_DW_OP_MASK,
114d4f70
BV		 298 },
299 {
300 .offset = 0,
301 .mask = MI_FLUSH_DW_STORE_INDEX,
302 .expected = 0,
303 .condition_offset = 0,
304 .condition_mask = MI_FLUSH_DW_OP_MASK,
d4d48035
BV		 305 }}, ),
306 CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, B,
307 .bits = {{
308 .offset = 0,
309 .mask = MI_GLOBAL_GTT,
310 .expected = 0,
b18b396b 311 }}, ),
3a6fa984
BV		 312};
313
314static const struct drm_i915_cmd_descriptor blt_cmds[] = {
9c640d1d 315 CMD( MI_DISPLAY_FLIP, SMI, !F, 0xFF, R ),
d4d48035
BV		 316 CMD( MI_STORE_DWORD_IMM, SMI, !F, 0x3FF, B,
317 .bits = {{
318 .offset = 0,
319 .mask = MI_GLOBAL_GTT,
320 .expected = 0,
321 }}, ),
9c640d1d 322 CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
b18b396b
BV		 323 CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
324 .bits = {{
325 .offset = 0,
326 .mask = MI_FLUSH_DW_NOTIFY,
327 .expected = 0,
d4d48035
BV		 328 },
329 {
330 .offset = 1,
331 .mask = MI_FLUSH_DW_USE_GTT,
332 .expected = 0,
333 .condition_offset = 0,
334 .condition_mask = MI_FLUSH_DW_OP_MASK,
114d4f70
BV		 335 },
336 {
337 .offset = 0,
338 .mask = MI_FLUSH_DW_STORE_INDEX,
339 .expected = 0,
340 .condition_offset = 0,
341 .condition_mask = MI_FLUSH_DW_OP_MASK,
b18b396b 342 }}, ),
3a6fa984
BV		 343 CMD( COLOR_BLT, S2D, !F, 0x3F, S ),
344 CMD( SRC_COPY_BLT, S2D, !F, 0x3F, S ),
345};
346
9c640d1d 347static const struct drm_i915_cmd_descriptor hsw_blt_cmds[] = {
17c1eb15 348 CMD( MI_LOAD_SCAN_LINES_INCL, SMI, !F, 0x3F, M ),
9c640d1d
BV		 349 CMD( MI_LOAD_SCAN_LINES_EXCL, SMI, !F, 0x3F, R ),
350};
351
3a6fa984
BV		 352#undef CMD
353#undef SMI
354#undef S3D
355#undef S2D
356#undef SMFX
357#undef F
358#undef S
359#undef R
360#undef W
361#undef B
362#undef M
363
364static const struct drm_i915_cmd_table gen7_render_cmds[] = {
365 { common_cmds, ARRAY_SIZE(common_cmds) },
366 { render_cmds, ARRAY_SIZE(render_cmds) },
367};
368
369static const struct drm_i915_cmd_table hsw_render_ring_cmds[] = {
370 { common_cmds, ARRAY_SIZE(common_cmds) },
371 { render_cmds, ARRAY_SIZE(render_cmds) },
372 { hsw_render_cmds, ARRAY_SIZE(hsw_render_cmds) },
373};
374
375static const struct drm_i915_cmd_table gen7_video_cmds[] = {
376 { common_cmds, ARRAY_SIZE(common_cmds) },
377 { video_cmds, ARRAY_SIZE(video_cmds) },
378};
379
380static const struct drm_i915_cmd_table hsw_vebox_cmds[] = {
381 { common_cmds, ARRAY_SIZE(common_cmds) },
382 { vecs_cmds, ARRAY_SIZE(vecs_cmds) },
383};
384
385static const struct drm_i915_cmd_table gen7_blt_cmds[] = {
386 { common_cmds, ARRAY_SIZE(common_cmds) },
387 { blt_cmds, ARRAY_SIZE(blt_cmds) },
388};
389
9c640d1d
BV		 390static const struct drm_i915_cmd_table hsw_blt_ring_cmds[] = {
391 { common_cmds, ARRAY_SIZE(common_cmds) },
392 { blt_cmds, ARRAY_SIZE(blt_cmds) },
393 { hsw_blt_cmds, ARRAY_SIZE(hsw_blt_cmds) },
394};
395
5947de9b
BV		 396/*
397 * Register whitelists, sorted by increasing register offset.
398 *
399 * Some registers that userspace accesses are 64 bits. The register
400 * access commands only allow 32-bit accesses. Hence, we have to include
401 * entries for both halves of the 64-bit registers.
402 */
403
404/* Convenience macro for adding 64-bit registers */
405#define REG64(addr) (addr), (addr + sizeof(u32))
406
407static const u32 gen7_render_regs[] = {
408 REG64(HS_INVOCATION_COUNT),
409 REG64(DS_INVOCATION_COUNT),
410 REG64(IA_VERTICES_COUNT),
411 REG64(IA_PRIMITIVES_COUNT),
412 REG64(VS_INVOCATION_COUNT),
413 REG64(GS_INVOCATION_COUNT),
414 REG64(GS_PRIMITIVES_COUNT),
415 REG64(CL_INVOCATION_COUNT),
416 REG64(CL_PRIMITIVES_COUNT),
417 REG64(PS_INVOCATION_COUNT),
418 REG64(PS_DEPTH_COUNT),
6e66ea13 419 OACONTROL, /* Only allowed for LRI and SRM. See below. */
f1f55cc0
NR		 420 REG64(MI_PREDICATE_SRC0),
421 REG64(MI_PREDICATE_SRC1),
113a0476
BV		 422 GEN7_3DPRIM_END_OFFSET,
423 GEN7_3DPRIM_START_VERTEX,
424 GEN7_3DPRIM_VERTEX_COUNT,
425 GEN7_3DPRIM_INSTANCE_COUNT,
426 GEN7_3DPRIM_START_INSTANCE,
427 GEN7_3DPRIM_BASE_VERTEX,
5947de9b
BV		 428 REG64(GEN7_SO_NUM_PRIMS_WRITTEN(0)),
429 REG64(GEN7_SO_NUM_PRIMS_WRITTEN(1)),
430 REG64(GEN7_SO_NUM_PRIMS_WRITTEN(2)),
431 REG64(GEN7_SO_NUM_PRIMS_WRITTEN(3)),
113a0476
BV		 432 REG64(GEN7_SO_PRIM_STORAGE_NEEDED(0)),
433 REG64(GEN7_SO_PRIM_STORAGE_NEEDED(1)),
434 REG64(GEN7_SO_PRIM_STORAGE_NEEDED(2)),
435 REG64(GEN7_SO_PRIM_STORAGE_NEEDED(3)),
5947de9b
BV		 436 GEN7_SO_WRITE_OFFSET(0),
437 GEN7_SO_WRITE_OFFSET(1),
438 GEN7_SO_WRITE_OFFSET(2),
439 GEN7_SO_WRITE_OFFSET(3),
c9224faa
BV		 440 GEN7_L3SQCREG1,
441 GEN7_L3CNTLREG2,
442 GEN7_L3CNTLREG3,
5947de9b
BV		 443};
444
445static const u32 gen7_blt_regs[] = {
446 BCS_SWCTRL,
447};
448
220375aa
BV		 449static const u32 ivb_master_regs[] = {
450 FORCEWAKE_MT,
451 DERRMR,
452 GEN7_PIPE_DE_LOAD_SL(PIPE_A),
453 GEN7_PIPE_DE_LOAD_SL(PIPE_B),
454 GEN7_PIPE_DE_LOAD_SL(PIPE_C),
455};
456
457static const u32 hsw_master_regs[] = {
458 FORCEWAKE_MT,
459 DERRMR,
460};
461
5947de9b
BV		 462#undef REG64
463
351e3db2
BV		 464static u32 gen7_render_get_cmd_length_mask(u32 cmd_header)
465{
466 u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
467 u32 subclient =
468 (cmd_header & INSTR_SUBCLIENT_MASK) >> INSTR_SUBCLIENT_SHIFT;
469
470 if (client == INSTR_MI_CLIENT)
471 return 0x3F;
472 else if (client == INSTR_RC_CLIENT) {
473 if (subclient == INSTR_MEDIA_SUBCLIENT)
474 return 0xFFFF;
475 else
476 return 0xFF;
477 }
478
479 DRM_DEBUG_DRIVER("CMD: Abnormal rcs cmd length! 0x%08X\n", cmd_header);
480 return 0;
481}
482
483static u32 gen7_bsd_get_cmd_length_mask(u32 cmd_header)
484{
485 u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
486 u32 subclient =
487 (cmd_header & INSTR_SUBCLIENT_MASK) >> INSTR_SUBCLIENT_SHIFT;
86ef630d 488 u32 op = (cmd_header & INSTR_26_TO_24_MASK) >> INSTR_26_TO_24_SHIFT;
351e3db2
BV		 489
490 if (client == INSTR_MI_CLIENT)
491 return 0x3F;
492 else if (client == INSTR_RC_CLIENT) {
86ef630d
MN		 493 if (subclient == INSTR_MEDIA_SUBCLIENT) {
494 if (op == 6)
495 return 0xFFFF;
496 else
497 return 0xFFF;
498 } else
351e3db2
BV		 499 return 0xFF;
500 }
501
502 DRM_DEBUG_DRIVER("CMD: Abnormal bsd cmd length! 0x%08X\n", cmd_header);
503 return 0;
504}
505
506static u32 gen7_blt_get_cmd_length_mask(u32 cmd_header)
507{
508 u32 client = (cmd_header & INSTR_CLIENT_MASK) >> INSTR_CLIENT_SHIFT;
509
510 if (client == INSTR_MI_CLIENT)
511 return 0x3F;
512 else if (client == INSTR_BC_CLIENT)
513 return 0xFF;
514
515 DRM_DEBUG_DRIVER("CMD: Abnormal blt cmd length! 0x%08X\n", cmd_header);
516 return 0;
517}
518
a4872ba6 519static bool validate_cmds_sorted(struct intel_engine_cs *ring,
44e895a8
BV		 520 const struct drm_i915_cmd_table *cmd_tables,
521 int cmd_table_count)
351e3db2
BV		 522{
523 int i;
300233ee 524 bool ret = true;
351e3db2 525
44e895a8 526 if (!cmd_tables || cmd_table_count == 0)
300233ee 527 return true;
351e3db2 528
44e895a8
BV		 529 for (i = 0; i < cmd_table_count; i++) {
530 const struct drm_i915_cmd_table *table = &cmd_tables[i];
351e3db2
BV		 531 u32 previous = 0;
532 int j;
533
534 for (j = 0; j < table->count; j++) {
535 const struct drm_i915_cmd_descriptor *desc =
536 &table->table[i];
537 u32 curr = desc->cmd.value & desc->cmd.mask;
538
300233ee 539 if (curr < previous) {
351e3db2
BV		 540 DRM_ERROR("CMD: table not sorted ring=%d table=%d entry=%d cmd=0x%08X prev=0x%08X\n",
541 ring->id, i, j, curr, previous);
300233ee
BV		 542 ret = false;
543 }
351e3db2
BV		 544
545 previous = curr;
546 }
547 }
300233ee
BV		 548
549 return ret;
351e3db2
BV		 550}
551
300233ee 552static bool check_sorted(int ring_id, const u32 *reg_table, int reg_count)
351e3db2
BV		 553{
554 int i;
555 u32 previous = 0;
300233ee 556 bool ret = true;
351e3db2
BV		 557
558 for (i = 0; i < reg_count; i++) {
559 u32 curr = reg_table[i];
560
300233ee 561 if (curr < previous) {
351e3db2
BV		 562 DRM_ERROR("CMD: table not sorted ring=%d entry=%d reg=0x%08X prev=0x%08X\n",
563 ring_id, i, curr, previous);
300233ee
BV		 564 ret = false;
565 }
351e3db2
BV		 566
567 previous = curr;
568 }
300233ee
BV		 569
570 return ret;
351e3db2
BV		 571}
572
a4872ba6 573static bool validate_regs_sorted(struct intel_engine_cs *ring)
351e3db2 574{
300233ee
BV		 575 return check_sorted(ring->id, ring->reg_table, ring->reg_count) &&
576 check_sorted(ring->id, ring->master_reg_table,
577 ring->master_reg_count);
351e3db2
BV		 578}
579
44e895a8
BV		 580struct cmd_node {
581 const struct drm_i915_cmd_descriptor *desc;
582 struct hlist_node node;
583};
584
585/*
586 * Different command ranges have different numbers of bits for the opcode. For
587 * example, MI commands use bits 31:23 while 3D commands use bits 31:16. The
588 * problem is that, for example, MI commands use bits 22:16 for other fields
589 * such as GGTT vs PPGTT bits. If we include those bits in the mask then when
590 * we mask a command from a batch it could hash to the wrong bucket due to
591 * non-opcode bits being set. But if we don't include those bits, some 3D
592 * commands may hash to the same bucket due to not including opcode bits that
593 * make the command unique. For now, we will risk hashing to the same bucket.
594 *
595 * If we attempt to generate a perfect hash, we should be able to look at bits
596 * 31:29 of a command from a batch buffer and use the full mask for that
597 * client. The existing INSTR_CLIENT_MASK/SHIFT defines can be used for this.
598 */
599#define CMD_HASH_MASK STD_MI_OPCODE_MASK
600
a4872ba6 601static int init_hash_table(struct intel_engine_cs *ring,
44e895a8
BV		 602 const struct drm_i915_cmd_table *cmd_tables,
603 int cmd_table_count)
604{
605 int i, j;
606
607 hash_init(ring->cmd_hash);
608
609 for (i = 0; i < cmd_table_count; i++) {
610 const struct drm_i915_cmd_table *table = &cmd_tables[i];
611
612 for (j = 0; j < table->count; j++) {
613 const struct drm_i915_cmd_descriptor *desc =
614 &table->table[j];
615 struct cmd_node *desc_node =
616 kmalloc(sizeof(*desc_node), GFP_KERNEL);
617
618 if (!desc_node)
619 return -ENOMEM;
620
621 desc_node->desc = desc;
622 hash_add(ring->cmd_hash, &desc_node->node,
623 desc->cmd.value & CMD_HASH_MASK);
624 }
625 }
626
627 return 0;
628}
629
a4872ba6 630static void fini_hash_table(struct intel_engine_cs *ring)
44e895a8
BV		 631{
632 struct hlist_node *tmp;
633 struct cmd_node *desc_node;
634 int i;
635
636 hash_for_each_safe(ring->cmd_hash, i, tmp, desc_node, node) {
637 hash_del(&desc_node->node);
638 kfree(desc_node);
639 }
640}
641
351e3db2
BV		 642/**
643 * i915_cmd_parser_init_ring() - set cmd parser related fields for a ringbuffer
644 * @ring: the ringbuffer to initialize
645 *
646 * Optionally initializes fields related to batch buffer command parsing in the
a4872ba6 647 * struct intel_engine_cs based on whether the platform requires software
351e3db2 648 * command parsing.
44e895a8
BV		 649 *
650 * Return: non-zero if initialization fails
351e3db2 651 */
a4872ba6 652int i915_cmd_parser_init_ring(struct intel_engine_cs *ring)
351e3db2 653{
44e895a8
BV		 654 const struct drm_i915_cmd_table *cmd_tables;
655 int cmd_table_count;
656 int ret;
657
351e3db2 658 if (!IS_GEN7(ring->dev))
44e895a8 659 return 0;
351e3db2
BV		 660
661 switch (ring->id) {
662 case RCS:
3a6fa984 663 if (IS_HASWELL(ring->dev)) {
44e895a8
BV		 664 cmd_tables = hsw_render_ring_cmds;
665 cmd_table_count =
3a6fa984
BV		 666 ARRAY_SIZE(hsw_render_ring_cmds);
667 } else {
44e895a8
BV		 668 cmd_tables = gen7_render_cmds;
669 cmd_table_count = ARRAY_SIZE(gen7_render_cmds);
3a6fa984
BV		 670 }
671
5947de9b
BV		 672 ring->reg_table = gen7_render_regs;
673 ring->reg_count = ARRAY_SIZE(gen7_render_regs);
674
220375aa
BV		 675 if (IS_HASWELL(ring->dev)) {
676 ring->master_reg_table = hsw_master_regs;
677 ring->master_reg_count = ARRAY_SIZE(hsw_master_regs);
678 } else {
679 ring->master_reg_table = ivb_master_regs;
680 ring->master_reg_count = ARRAY_SIZE(ivb_master_regs);
681 }
682
351e3db2
BV		 683 ring->get_cmd_length_mask = gen7_render_get_cmd_length_mask;
684 break;
685 case VCS:
44e895a8
BV		 686 cmd_tables = gen7_video_cmds;
687 cmd_table_count = ARRAY_SIZE(gen7_video_cmds);
351e3db2
BV		 688 ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
689 break;
690 case BCS:
9c640d1d 691 if (IS_HASWELL(ring->dev)) {
44e895a8
BV		 692 cmd_tables = hsw_blt_ring_cmds;
693 cmd_table_count = ARRAY_SIZE(hsw_blt_ring_cmds);
9c640d1d 694 } else {
44e895a8
BV		 695 cmd_tables = gen7_blt_cmds;
696 cmd_table_count = ARRAY_SIZE(gen7_blt_cmds);
9c640d1d
BV		 697 }
698
5947de9b
BV		 699 ring->reg_table = gen7_blt_regs;
700 ring->reg_count = ARRAY_SIZE(gen7_blt_regs);
701
220375aa
BV		 702 if (IS_HASWELL(ring->dev)) {
703 ring->master_reg_table = hsw_master_regs;
704 ring->master_reg_count = ARRAY_SIZE(hsw_master_regs);
705 } else {
706 ring->master_reg_table = ivb_master_regs;
707 ring->master_reg_count = ARRAY_SIZE(ivb_master_regs);
708 }
709
351e3db2
BV		 710 ring->get_cmd_length_mask = gen7_blt_get_cmd_length_mask;
711 break;
712 case VECS:
44e895a8
BV		 713 cmd_tables = hsw_vebox_cmds;
714 cmd_table_count = ARRAY_SIZE(hsw_vebox_cmds);
351e3db2
BV		 715 /* VECS can use the same length_mask function as VCS */
716 ring->get_cmd_length_mask = gen7_bsd_get_cmd_length_mask;
717 break;
718 default:
719 DRM_ERROR("CMD: cmd_parser_init with unknown ring: %d\n",
720 ring->id);
721 BUG();
722 }
723
44e895a8 724 BUG_ON(!validate_cmds_sorted(ring, cmd_tables, cmd_table_count));
300233ee 725 BUG_ON(!validate_regs_sorted(ring));
44e895a8 726
bfc882b4
DV		 727 WARN_ON(!hash_empty(ring->cmd_hash));
728
729 ret = init_hash_table(ring, cmd_tables, cmd_table_count);
730 if (ret) {
731 DRM_ERROR("CMD: cmd_parser_init failed!\n");
732 fini_hash_table(ring);
733 return ret;
44e895a8
BV		 734 }
735
736 ring->needs_cmd_parser = true;
737
738 return 0;
739}
740
741/**
742 * i915_cmd_parser_fini_ring() - clean up cmd parser related fields
743 * @ring: the ringbuffer to clean up
744 *
745 * Releases any resources related to command parsing that may have been
746 * initialized for the specified ring.
747 */
a4872ba6 748void i915_cmd_parser_fini_ring(struct intel_engine_cs *ring)
44e895a8
BV		 749{
750 if (!ring->needs_cmd_parser)
751 return;
752
753 fini_hash_table(ring);
351e3db2
BV		 754}
755
756static const struct drm_i915_cmd_descriptor*
a4872ba6 757find_cmd_in_table(struct intel_engine_cs *ring,
351e3db2
BV		 758 u32 cmd_header)
759{
44e895a8 760 struct cmd_node *desc_node;
351e3db2 761
44e895a8
BV		 762 hash_for_each_possible(ring->cmd_hash, desc_node, node,
763 cmd_header & CMD_HASH_MASK) {
764 const struct drm_i915_cmd_descriptor *desc = desc_node->desc;
351e3db2
BV		 765 u32 masked_cmd = desc->cmd.mask & cmd_header;
766 u32 masked_value = desc->cmd.value & desc->cmd.mask;
767
768 if (masked_cmd == masked_value)
769 return desc;
770 }
771
772 return NULL;
773}
774
775/*
776 * Returns a pointer to a descriptor for the command specified by cmd_header.
777 *
778 * The caller must supply space for a default descriptor via the default_desc
779 * parameter. If no descriptor for the specified command exists in the ring's
780 * command parser tables, this function fills in default_desc based on the
781 * ring's default length encoding and returns default_desc.
782 */
783static const struct drm_i915_cmd_descriptor*
a4872ba6 784find_cmd(struct intel_engine_cs *ring,
351e3db2
BV		 785 u32 cmd_header,
786 struct drm_i915_cmd_descriptor *default_desc)
787{
44e895a8 788 const struct drm_i915_cmd_descriptor *desc;
351e3db2 789 u32 mask;
351e3db2 790
44e895a8
BV		 791 desc = find_cmd_in_table(ring, cmd_header);
792 if (desc)
793 return desc;
351e3db2
BV		 794
795 mask = ring->get_cmd_length_mask(cmd_header);
796 if (!mask)
797 return NULL;
798
799 BUG_ON(!default_desc);
800 default_desc->flags = CMD_DESC_SKIP;
801 default_desc->length.mask = mask;
802
803 return default_desc;
804}
805
806static bool valid_reg(const u32 *table, int count, u32 addr)
807{
808 if (table && count != 0) {
809 int i;
810
811 for (i = 0; i < count; i++) {
812 if (table[i] == addr)
813 return true;
814 }
815 }
816
817 return false;
818}
819
820static u32 *vmap_batch(struct drm_i915_gem_object *obj)
821{
822 int i;
823 void *addr = NULL;
824 struct sg_page_iter sg_iter;
825 struct page **pages;
826
827 pages = drm_malloc_ab(obj->base.size >> PAGE_SHIFT, sizeof(*pages));
828 if (pages == NULL) {
829 DRM_DEBUG_DRIVER("Failed to get space for pages\n");
830 goto finish;
831 }
832
833 i = 0;
834 for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents, 0) {
835 pages[i] = sg_page_iter_page(&sg_iter);
836 i++;
837 }
838
839 addr = vmap(pages, i, 0, PAGE_KERNEL);
840 if (addr == NULL) {
841 DRM_DEBUG_DRIVER("Failed to vmap pages\n");
842 goto finish;
843 }
844
845finish:
846 if (pages)
847 drm_free_large(pages);
848 return (u32*)addr;
849}
850
78a42377
BV		 851/* Returns a vmap'd pointer to dest_obj, which the caller must unmap */
852static u32 *copy_batch(struct drm_i915_gem_object *dest_obj,
853 struct drm_i915_gem_object *src_obj)
854{
855 int ret = 0;
856 int needs_clflush = 0;
857 u32 *src_addr, *dest_addr = NULL;
858
859 ret = i915_gem_obj_prepare_shmem_read(src_obj, &needs_clflush);
860 if (ret) {
861 DRM_DEBUG_DRIVER("CMD: failed to prep read\n");
862 return ERR_PTR(ret);
863 }
864
865 src_addr = vmap_batch(src_obj);
866 if (!src_addr) {
867 DRM_DEBUG_DRIVER("CMD: Failed to vmap batch\n");
868 ret = -ENOMEM;
869 goto unpin_src;
870 }
871
872 if (needs_clflush)
873 drm_clflush_virt_range((char *)src_addr, src_obj->base.size);
874
875 ret = i915_gem_object_set_to_cpu_domain(dest_obj, true);
876 if (ret) {
877 DRM_DEBUG_DRIVER("CMD: Failed to set batch CPU domain\n");
878 goto unmap_src;
879 }
880
881 dest_addr = vmap_batch(dest_obj);
882 if (!dest_addr) {
883 DRM_DEBUG_DRIVER("CMD: Failed to vmap shadow batch\n");
884 ret = -ENOMEM;
885 goto unmap_src;
886 }
887
888 memcpy(dest_addr, src_addr, src_obj->base.size);
889 if (dest_obj->base.size > src_obj->base.size)
890 memset((u8 *)dest_addr + src_obj->base.size, 0,
891 dest_obj->base.size - src_obj->base.size);
892
893unmap_src:
894 vunmap(src_addr);
895unpin_src:
896 i915_gem_object_unpin_pages(src_obj);
897
898 return ret ? ERR_PTR(ret) : dest_addr;
899}
900
351e3db2
BV		 901/**
902 * i915_needs_cmd_parser() - should a given ring use software command parsing?
903 * @ring: the ring in question
904 *
905 * Only certain platforms require software batch buffer command parsing, and
32197aab 906 * only when enabled via module parameter.
351e3db2
BV		 907 *
908 * Return: true if the ring requires software command parsing
909 */
a4872ba6 910bool i915_needs_cmd_parser(struct intel_engine_cs *ring)
351e3db2 911{
44e895a8 912 if (!ring->needs_cmd_parser)
351e3db2
BV		 913 return false;
914
9beb0ccb 915 if (!USES_PPGTT(ring->dev))
d4d48035
BV		 916 return false;
917
351e3db2
BV		 918 return (i915.enable_cmd_parser == 1);
919}
920
a4872ba6 921static bool check_cmd(const struct intel_engine_cs *ring,
b651000b
BV		 922 const struct drm_i915_cmd_descriptor *desc,
923 const u32 *cmd,
6e66ea13
BV		 924 const bool is_master,
925 bool *oacontrol_set)
b651000b
BV		 926{
927 if (desc->flags & CMD_DESC_REJECT) {
928 DRM_DEBUG_DRIVER("CMD: Rejected command: 0x%08X\n", *cmd);
929 return false;
930 }
931
932 if ((desc->flags & CMD_DESC_MASTER) && !is_master) {
933 DRM_DEBUG_DRIVER("CMD: Rejected master-only command: 0x%08X\n",
934 *cmd);
935 return false;
936 }
937
938 if (desc->flags & CMD_DESC_REGISTER) {
939 u32 reg_addr = cmd[desc->reg.offset] & desc->reg.mask;
940
6e66ea13
BV		 941 /*
942 * OACONTROL requires some special handling for writes. We
943 * want to make sure that any batch which enables OA also
944 * disables it before the end of the batch. The goal is to
945 * prevent one process from snooping on the perf data from
946 * another process. To do that, we need to check the value
947 * that will be written to the register. Hence, limit
948 * OACONTROL writes to only MI_LOAD_REGISTER_IMM commands.
949 */
950 if (reg_addr == OACONTROL) {
00caf019
BV		 951 if (desc->cmd.value == MI_LOAD_REGISTER_MEM) {
952 DRM_DEBUG_DRIVER("CMD: Rejected LRM to OACONTROL\n");
6e66ea13 953 return false;
00caf019 954 }
6e66ea13
BV		 955
956 if (desc->cmd.value == MI_LOAD_REGISTER_IMM(1))
957 *oacontrol_set = (cmd[2] != 0);
958 }
959
b651000b
BV		 960 if (!valid_reg(ring->reg_table,
961 ring->reg_count, reg_addr)) {
962 if (!is_master ||
963 !valid_reg(ring->master_reg_table,
964 ring->master_reg_count,
965 reg_addr)) {
966 DRM_DEBUG_DRIVER("CMD: Rejected register 0x%08X in command: 0x%08X (ring=%d)\n",
967 reg_addr,
968 *cmd,
969 ring->id);
970 return false;
971 }
972 }
973 }
974
975 if (desc->flags & CMD_DESC_BITMASK) {
976 int i;
977
978 for (i = 0; i < MAX_CMD_DESC_BITMASKS; i++) {
979 u32 dword;
980
981 if (desc->bits[i].mask == 0)
982 break;
983
984 if (desc->bits[i].condition_mask != 0) {
985 u32 offset =
986 desc->bits[i].condition_offset;
987 u32 condition = cmd[offset] &
988 desc->bits[i].condition_mask;
989
990 if (condition == 0)
991 continue;
992 }
993
994 dword = cmd[desc->bits[i].offset] &
995 desc->bits[i].mask;
996
997 if (dword != desc->bits[i].expected) {
998 DRM_DEBUG_DRIVER("CMD: Rejected command 0x%08X for bitmask 0x%08X (exp=0x%08X act=0x%08X) (ring=%d)\n",
999 *cmd,
1000 desc->bits[i].mask,
1001 desc->bits[i].expected,
1002 dword, ring->id);
1003 return false;
1004 }
1005 }
1006 }
1007
1008 return true;
1009}
1010
351e3db2
BV		 1011#define LENGTH_BIAS 2
1012
1013/**
1014 * i915_parse_cmds() - parse a submitted batch buffer for privilege violations
1015 * @ring: the ring on which the batch is to execute
1016 * @batch_obj: the batch buffer in question
78a42377 1017 * @shadow_batch_obj: copy of the batch buffer in question
351e3db2
BV		 1018 * @batch_start_offset: byte offset in the batch at which execution starts
1019 * @is_master: is the submitting process the drm master?
1020 *
1021 * Parses the specified batch buffer looking for privilege violations as
1022 * described in the overview.
1023 *
42c7156a
BV		 1024 * Return: non-zero if the parser finds violations or otherwise fails; -EACCES
1025 * if the batch appears legal but should use hardware parsing
351e3db2 1026 */
a4872ba6 1027int i915_parse_cmds(struct intel_engine_cs *ring,
351e3db2 1028 struct drm_i915_gem_object *batch_obj,
78a42377 1029 struct drm_i915_gem_object *shadow_batch_obj,
351e3db2
BV		 1030 u32 batch_start_offset,
1031 bool is_master)
1032{
1033 int ret = 0;
1034 u32 *cmd, *batch_base, *batch_end;
1035 struct drm_i915_cmd_descriptor default_desc = { 0 };
6e66ea13 1036 bool oacontrol_set = false; /* OACONTROL tracking. See check_cmd() */
351e3db2 1037
78a42377
BV		 1038 batch_base = copy_batch(shadow_batch_obj, batch_obj);
1039 if (IS_ERR(batch_base)) {
1040 DRM_DEBUG_DRIVER("CMD: Failed to copy batch\n");
1041 return PTR_ERR(batch_base);
351e3db2
BV		 1042 }
1043
351e3db2 1044 cmd = batch_base + (batch_start_offset / sizeof(*cmd));
78a42377
BV		 1045
1046 /*
1047 * We use the source object's size because the shadow object is as
1048 * large or larger and copy_batch() will write MI_NOPs to the extra
1049 * space. Parsing should be faster in some cases this way.
1050 */
351e3db2
BV		 1051 batch_end = cmd + (batch_obj->base.size / sizeof(*batch_end));
1052
1053 while (cmd < batch_end) {
1054 const struct drm_i915_cmd_descriptor *desc;
1055 u32 length;
1056
1057 if (*cmd == MI_BATCH_BUFFER_END)
1058 break;
1059
1060 desc = find_cmd(ring, *cmd, &default_desc);
1061 if (!desc) {
1062 DRM_DEBUG_DRIVER("CMD: Unrecognized command: 0x%08X\n",
1063 *cmd);
1064 ret = -EINVAL;
1065 break;
1066 }
1067
42c7156a
BV		 1068 /*
1069 * If the batch buffer contains a chained batch, return an
1070 * error that tells the caller to abort and dispatch the
1071 * workload as a non-secure batch.
1072 */
1073 if (desc->cmd.value == MI_BATCH_BUFFER_START) {
1074 ret = -EACCES;
1075 break;
1076 }
1077
351e3db2
BV		 1078 if (desc->flags & CMD_DESC_FIXED)
1079 length = desc->length.fixed;
1080 else
1081 length = ((*cmd & desc->length.mask) + LENGTH_BIAS);
1082
1083 if ((batch_end - cmd) < length) {
86a25121 1084 DRM_DEBUG_DRIVER("CMD: Command length exceeds batch length: 0x%08X length=%u batchlen=%td\n",
351e3db2
BV		 1085 *cmd,
1086 length,
4b6eab59 1087 batch_end - cmd);
351e3db2
BV		 1088 ret = -EINVAL;
1089 break;
1090 }
1091
6e66ea13 1092 if (!check_cmd(ring, desc, cmd, is_master, &oacontrol_set)) {
351e3db2
BV		 1093 ret = -EINVAL;
1094 break;
1095 }
1096
351e3db2
BV		 1097 cmd += length;
1098 }
1099
6e66ea13
BV		 1100 if (oacontrol_set) {
1101 DRM_DEBUG_DRIVER("CMD: batch set OACONTROL but did not clear it\n");
1102 ret = -EINVAL;
1103 }
1104
351e3db2
BV		 1105 if (cmd >= batch_end) {
1106 DRM_DEBUG_DRIVER("CMD: Got to the end of the buffer w/o a BBE cmd!\n");
1107 ret = -EINVAL;
1108 }
1109
1110 vunmap(batch_base);
1111
351e3db2
BV		 1112 return ret;
1113}
d728c8ef
BV		 1114
1115/**
1116 * i915_cmd_parser_get_version() - get the cmd parser version number
1117 *
1118 * The cmd parser maintains a simple increasing integer version number suitable
1119 * for passing to userspace clients to determine what operations are permitted.
1120 *
1121 * Return: the current version number of the cmd parser
1122 */
1123int i915_cmd_parser_get_version(void)
1124{
1125 /*
1126 * Command parser version history
1127 *
1128 * 1. Initial version. Checks batches and reports violations, but leaves
1129 * hardware parsing enabled (so does not allow new use cases).
f1f55cc0
NR		 1130 * 2. Allow access to the MI_PREDICATE_SRC0 and
1131 * MI_PREDICATE_SRC1 registers.
d728c8ef 1132 */
f1f55cc0 1133 return 2;
d728c8ef 1134}
Linux 6.x block layer and io_uring tree(s)