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1 /**************************************************************************
2  *
3  * Copyright 2008 VMware, Inc.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * The above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  **************************************************************************/
27 
28 
29 #include "compiler/nir/nir.h"
30 #include "util/u_memory.h"
31 #include "util/format/u_format.h"
32 #include "util/format/u_format_s3tc.h"
33 #include "util/u_screen.h"
34 #include "util/u_video.h"
35 #include "util/os_misc.h"
36 #include "util/os_time.h"
37 #include "pipe/p_defines.h"
38 #include "pipe/p_screen.h"
39 #include "draw/draw_context.h"
40 
41 #include "frontend/sw_winsys.h"
42 #include "tgsi/tgsi_exec.h"
43 
44 #include "sp_texture.h"
45 #include "sp_screen.h"
46 #include "sp_context.h"
47 #include "sp_fence.h"
48 #include "sp_public.h"
49 
50 static const struct debug_named_value sp_debug_options[] = {
51    {"vs",        SP_DBG_VS,         "dump vertex shader assembly to stderr"},
52    {"gs",        SP_DBG_GS,         "dump geometry shader assembly to stderr"},
53    {"fs",        SP_DBG_FS,         "dump fragment shader assembly to stderr"},
54    {"cs",        SP_DBG_CS,         "dump compute shader assembly to stderr"},
55    {"no_rast",   SP_DBG_NO_RAST,    "no-ops rasterization, for profiling purposes"},
56    {"use_llvm",  SP_DBG_USE_LLVM,   "Use LLVM if available for shaders"},
57    {"use_tgsi",  SP_DBG_USE_TGSI,   "Request TGSI from the API instead of NIR"},
58 };
59 
60 int sp_debug;
61 DEBUG_GET_ONCE_FLAGS_OPTION(sp_debug, "SOFTPIPE_DEBUG", sp_debug_options, 0)
62 
63 static const char *
softpipe_get_vendor(struct pipe_screen * screen)64 softpipe_get_vendor(struct pipe_screen *screen)
65 {
66    return "Mesa/X.org";
67 }
68 
69 
70 static const char *
softpipe_get_name(struct pipe_screen * screen)71 softpipe_get_name(struct pipe_screen *screen)
72 {
73    return "softpipe";
74 }
75 
76 static const nir_shader_compiler_options sp_compiler_options = {
77    .fuse_ffma32 = true,
78    .fuse_ffma64 = true,
79    .lower_extract_byte = true,
80    .lower_extract_word = true,
81    .lower_fdph = true,
82    .lower_flrp64 = true,
83    .lower_fmod = true,
84    .lower_rotate = true,
85    .lower_sub = true,
86    .lower_vector_cmp = true,
87    .use_interpolated_input_intrinsics = true,
88 };
89 
90 static const void *
softpipe_get_compiler_options(struct pipe_screen * pscreen,enum pipe_shader_ir ir,enum pipe_shader_type shader)91 softpipe_get_compiler_options(struct pipe_screen *pscreen,
92                               enum pipe_shader_ir ir,
93                               enum pipe_shader_type shader)
94 {
95    assert(ir == PIPE_SHADER_IR_NIR);
96    return &sp_compiler_options;
97 }
98 
99 static int
softpipe_get_param(struct pipe_screen * screen,enum pipe_cap param)100 softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
101 {
102    struct softpipe_screen *sp_screen = softpipe_screen(screen);
103    switch (param) {
104    case PIPE_CAP_NPOT_TEXTURES:
105    case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
106    case PIPE_CAP_MIXED_COLOR_DEPTH_BITS:
107       return 1;
108    case PIPE_CAP_FRAGMENT_SHADER_TEXTURE_LOD:
109    case PIPE_CAP_FRAGMENT_SHADER_DERIVATIVES:
110    case PIPE_CAP_VERTEX_SHADER_SATURATE:
111       return 1;
112    case PIPE_CAP_ANISOTROPIC_FILTER:
113       return 1;
114    case PIPE_CAP_POINT_SPRITE:
115       return 1;
116    case PIPE_CAP_MAX_RENDER_TARGETS:
117       return PIPE_MAX_COLOR_BUFS;
118    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
119       return 1;
120    case PIPE_CAP_OCCLUSION_QUERY:
121       return 1;
122    case PIPE_CAP_QUERY_TIME_ELAPSED:
123       return 1;
124    case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
125       return 1;
126    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
127    case PIPE_CAP_TEXTURE_MIRROR_CLAMP_TO_EDGE:
128       return 1;
129    case PIPE_CAP_TEXTURE_SWIZZLE:
130       return 1;
131    case PIPE_CAP_MAX_TEXTURE_2D_SIZE:
132       return 1 << (SP_MAX_TEXTURE_2D_LEVELS - 1);
133    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
134       return SP_MAX_TEXTURE_3D_LEVELS;
135    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
136       return SP_MAX_TEXTURE_CUBE_LEVELS;
137    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
138       return 1;
139    case PIPE_CAP_INDEP_BLEND_ENABLE:
140       return 1;
141    case PIPE_CAP_INDEP_BLEND_FUNC:
142       return 1;
143    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
144    case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
145    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
146    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
147       return 1;
148    case PIPE_CAP_DEPTH_CLIP_DISABLE:
149       return 1;
150    case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
151       return PIPE_MAX_SO_BUFFERS;
152    case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
153    case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
154       return 16*4;
155    case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
156    case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
157       return 1024;
158    case PIPE_CAP_MAX_VERTEX_STREAMS:
159       if (sp_screen->use_llvm)
160          return 1;
161       else
162          return PIPE_MAX_VERTEX_STREAMS;
163    case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
164       return 2048;
165    case PIPE_CAP_PRIMITIVE_RESTART:
166    case PIPE_CAP_PRIMITIVE_RESTART_FIXED_INDEX:
167       return 1;
168    case PIPE_CAP_SHADER_STENCIL_EXPORT:
169       return 1;
170    case PIPE_CAP_TGSI_ATOMFADD:
171    case PIPE_CAP_TGSI_INSTANCEID:
172    case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
173    case PIPE_CAP_START_INSTANCE:
174       return 1;
175    case PIPE_CAP_SEAMLESS_CUBE_MAP:
176    case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
177       return 1;
178    case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
179       return 256; /* for GL3 */
180    case PIPE_CAP_MIN_TEXEL_OFFSET:
181       return -8;
182    case PIPE_CAP_MAX_TEXEL_OFFSET:
183       return 7;
184    case PIPE_CAP_CONDITIONAL_RENDER:
185    case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
186    case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: /* draw module */
187    case PIPE_CAP_VERTEX_COLOR_CLAMPED: /* draw module */
188       return 1;
189    case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
190       return 1;
191    case PIPE_CAP_GLSL_FEATURE_LEVEL:
192       return 400;
193    case PIPE_CAP_GLSL_FEATURE_LEVEL_COMPATIBILITY:
194       return 140;
195    case PIPE_CAP_COMPUTE:
196       return 1;
197    case PIPE_CAP_USER_VERTEX_BUFFERS:
198    case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
199    case PIPE_CAP_STREAM_OUTPUT_INTERLEAVE_BUFFERS:
200    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
201    case PIPE_CAP_DOUBLES:
202    case PIPE_CAP_INT64:
203    case PIPE_CAP_INT64_DIVMOD:
204    case PIPE_CAP_TGSI_DIV:
205       return 1;
206    case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
207       return 16;
208    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
209       return 64;
210    case PIPE_CAP_QUERY_TIMESTAMP:
211    case PIPE_CAP_CUBE_MAP_ARRAY:
212       return 1;
213    case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
214       return 1;
215    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
216       return 65536;
217    case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
218       return 16;
219    case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
220       return 0;
221    case PIPE_CAP_MAX_VIEWPORTS:
222       return PIPE_MAX_VIEWPORTS;
223    case PIPE_CAP_ENDIANNESS:
224       return PIPE_ENDIAN_NATIVE;
225    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
226       return 4;
227    case PIPE_CAP_TEXTURE_GATHER_SM5:
228    case PIPE_CAP_TEXTURE_QUERY_LOD:
229       return 1;
230    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
231       return 1;
232    case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
233       return 1;
234    case PIPE_CAP_SAMPLER_VIEW_TARGET:
235       return 1;
236    case PIPE_CAP_FAKE_SW_MSAA:
237       return 1;
238    case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
239       return -32;
240    case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
241       return 31;
242    case PIPE_CAP_DRAW_INDIRECT:
243       return 1;
244    case PIPE_CAP_QUERY_SO_OVERFLOW:
245       return 1;
246    case PIPE_CAP_NIR_IMAGES_AS_DEREF:
247       return 0;
248 
249    case PIPE_CAP_VENDOR_ID:
250       return 0xFFFFFFFF;
251    case PIPE_CAP_DEVICE_ID:
252       return 0xFFFFFFFF;
253    case PIPE_CAP_ACCELERATED:
254       return 0;
255    case PIPE_CAP_VIDEO_MEMORY: {
256       /* XXX: Do we want to return the full amount fo system memory ? */
257       uint64_t system_memory;
258 
259       if (!os_get_total_physical_memory(&system_memory))
260          return 0;
261 
262       if (sizeof(void *) == 4)
263          /* Cap to 2 GB on 32 bits system. We do this because softpipe does
264           * eat application memory, which is quite limited on 32 bits. App
265           * shouldn't expect too much available memory. */
266          system_memory = MIN2(system_memory, 2048 << 20);
267 
268       return (int)(system_memory >> 20);
269    }
270    case PIPE_CAP_UMA:
271       return 0;
272    case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
273       return 1;
274    case PIPE_CAP_CLIP_HALFZ:
275    case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
276    case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
277       return 1;
278    case PIPE_CAP_FRAMEBUFFER_NO_ATTACHMENT:
279    case PIPE_CAP_CULL_DISTANCE:
280    case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
281    case PIPE_CAP_TGSI_ARRAY_COMPONENTS:
282    case PIPE_CAP_TGSI_TEXCOORD:
283    case PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS:
284       return 1;
285    case PIPE_CAP_CLEAR_TEXTURE:
286       return 1;
287    case PIPE_CAP_MAX_VARYINGS:
288       return TGSI_EXEC_MAX_INPUT_ATTRIBS;
289    case PIPE_CAP_PCI_GROUP:
290    case PIPE_CAP_PCI_BUS:
291    case PIPE_CAP_PCI_DEVICE:
292    case PIPE_CAP_PCI_FUNCTION:
293       return 0;
294    case PIPE_CAP_MAX_GS_INVOCATIONS:
295       return 32;
296    case PIPE_CAP_MAX_SHADER_BUFFER_SIZE:
297       return 1 << 27;
298    case PIPE_CAP_SHADER_BUFFER_OFFSET_ALIGNMENT:
299       return 4;
300    default:
301       return u_pipe_screen_get_param_defaults(screen, param);
302    }
303 }
304 
305 static int
softpipe_get_shader_param(struct pipe_screen * screen,enum pipe_shader_type shader,enum pipe_shader_cap param)306 softpipe_get_shader_param(struct pipe_screen *screen,
307                           enum pipe_shader_type shader,
308                           enum pipe_shader_cap param)
309 {
310    struct softpipe_screen *sp_screen = softpipe_screen(screen);
311 
312    switch (param) {
313    case PIPE_SHADER_CAP_PREFERRED_IR:
314       return (sp_debug & SP_DBG_USE_TGSI) ? PIPE_SHADER_IR_TGSI : PIPE_SHADER_IR_NIR;
315    case PIPE_SHADER_CAP_SUPPORTED_IRS:
316       return (1 << PIPE_SHADER_IR_NIR) | (1 << PIPE_SHADER_IR_TGSI);
317    default:
318       break;
319    }
320 
321    switch(shader)
322    {
323    case PIPE_SHADER_FRAGMENT:
324       return tgsi_exec_get_shader_param(param);
325    case PIPE_SHADER_COMPUTE:
326       return tgsi_exec_get_shader_param(param);
327    case PIPE_SHADER_VERTEX:
328    case PIPE_SHADER_GEOMETRY:
329       if (sp_screen->use_llvm)
330          return draw_get_shader_param(shader, param);
331       else
332          return draw_get_shader_param_no_llvm(shader, param);
333    default:
334       return 0;
335    }
336 }
337 
338 static float
softpipe_get_paramf(struct pipe_screen * screen,enum pipe_capf param)339 softpipe_get_paramf(struct pipe_screen *screen, enum pipe_capf param)
340 {
341    switch (param) {
342    case PIPE_CAPF_MAX_LINE_WIDTH:
343       /* fall-through */
344    case PIPE_CAPF_MAX_LINE_WIDTH_AA:
345       return 255.0; /* arbitrary */
346    case PIPE_CAPF_MAX_POINT_WIDTH:
347       /* fall-through */
348    case PIPE_CAPF_MAX_POINT_WIDTH_AA:
349       return 255.0; /* arbitrary */
350    case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
351       return 16.0;
352    case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
353       return 16.0; /* arbitrary */
354    case PIPE_CAPF_MIN_CONSERVATIVE_RASTER_DILATE:
355       return 0.0;
356    case PIPE_CAPF_MAX_CONSERVATIVE_RASTER_DILATE:
357       return 0.0;
358    case PIPE_CAPF_CONSERVATIVE_RASTER_DILATE_GRANULARITY:
359       return 0.0;
360    }
361    /* should only get here on unhandled cases */
362    debug_printf("Unexpected PIPE_CAPF %d query\n", param);
363    return 0.0;
364 }
365 
366 /**
367  * Query format support for creating a texture, drawing surface, etc.
368  * \param format  the format to test
369  * \param type  one of PIPE_TEXTURE, PIPE_SURFACE
370  */
371 static bool
softpipe_is_format_supported(struct pipe_screen * screen,enum pipe_format format,enum pipe_texture_target target,unsigned sample_count,unsigned storage_sample_count,unsigned bind)372 softpipe_is_format_supported( struct pipe_screen *screen,
373                               enum pipe_format format,
374                               enum pipe_texture_target target,
375                               unsigned sample_count,
376                               unsigned storage_sample_count,
377                               unsigned bind)
378 {
379    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
380    const struct util_format_description *format_desc;
381 
382    assert(target == PIPE_BUFFER ||
383           target == PIPE_TEXTURE_1D ||
384           target == PIPE_TEXTURE_1D_ARRAY ||
385           target == PIPE_TEXTURE_2D ||
386           target == PIPE_TEXTURE_2D_ARRAY ||
387           target == PIPE_TEXTURE_RECT ||
388           target == PIPE_TEXTURE_3D ||
389           target == PIPE_TEXTURE_CUBE ||
390           target == PIPE_TEXTURE_CUBE_ARRAY);
391 
392    if (MAX2(1, sample_count) != MAX2(1, storage_sample_count))
393       return false;
394 
395    format_desc = util_format_description(format);
396    if (!format_desc)
397       return false;
398 
399    if (sample_count > 1)
400       return false;
401 
402    if (bind & (PIPE_BIND_DISPLAY_TARGET |
403                PIPE_BIND_SCANOUT |
404                PIPE_BIND_SHARED)) {
405       if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
406          return false;
407    }
408 
409    if (bind & PIPE_BIND_RENDER_TARGET) {
410       if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
411          return false;
412 
413       /*
414        * Although possible, it is unnatural to render into compressed or YUV
415        * surfaces. So disable these here to avoid going into weird paths
416        * inside gallium frontends.
417        */
418       if (format_desc->block.width != 1 ||
419           format_desc->block.height != 1)
420          return false;
421    }
422 
423    if (bind & PIPE_BIND_DEPTH_STENCIL) {
424       if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
425          return false;
426    }
427 
428    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ASTC ||
429        format_desc->layout == UTIL_FORMAT_LAYOUT_ATC) {
430       /* Software decoding is not hooked up. */
431       return false;
432    }
433 
434    if ((bind & (PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW)) &&
435        ((bind & PIPE_BIND_DISPLAY_TARGET) == 0) &&
436        target != PIPE_BUFFER) {
437       const struct util_format_description *desc =
438          util_format_description(format);
439       if (desc->nr_channels == 3 && desc->is_array) {
440          /* Don't support any 3-component formats for rendering/texturing
441           * since we don't support the corresponding 8-bit 3 channel UNORM
442           * formats.  This allows us to support GL_ARB_copy_image between
443           * GL_RGB8 and GL_RGB8UI, for example.  Otherwise, we may be asked to
444           * do a resource copy between PIPE_FORMAT_R8G8B8_UINT and
445           * PIPE_FORMAT_R8G8B8X8_UNORM, for example, which will not work
446           * (different bpp).
447           */
448          return false;
449       }
450    }
451 
452    if (format_desc->layout == UTIL_FORMAT_LAYOUT_ETC &&
453        format != PIPE_FORMAT_ETC1_RGB8)
454       return false;
455 
456    /*
457     * All other operations (sampling, transfer, etc).
458     */
459 
460    /*
461     * Everything else should be supported by u_format.
462     */
463    return true;
464 }
465 
466 
467 static void
softpipe_destroy_screen(struct pipe_screen * screen)468 softpipe_destroy_screen( struct pipe_screen *screen )
469 {
470    struct softpipe_screen *sp_screen = softpipe_screen(screen);
471    struct sw_winsys *winsys = sp_screen->winsys;
472 
473    if(winsys->destroy)
474       winsys->destroy(winsys);
475 
476    FREE(screen);
477 }
478 
479 
480 /* This is often overriden by the co-state tracker.
481  */
482 static void
softpipe_flush_frontbuffer(struct pipe_screen * _screen,struct pipe_resource * resource,unsigned level,unsigned layer,void * context_private,struct pipe_box * sub_box)483 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
484                            struct pipe_resource *resource,
485                            unsigned level, unsigned layer,
486                            void *context_private,
487                            struct pipe_box *sub_box)
488 {
489    struct softpipe_screen *screen = softpipe_screen(_screen);
490    struct sw_winsys *winsys = screen->winsys;
491    struct softpipe_resource *texture = softpipe_resource(resource);
492 
493    assert(texture->dt);
494    if (texture->dt)
495       winsys->displaytarget_display(winsys, texture->dt, context_private, sub_box);
496 }
497 
498 static uint64_t
softpipe_get_timestamp(struct pipe_screen * _screen)499 softpipe_get_timestamp(struct pipe_screen *_screen)
500 {
501    return os_time_get_nano();
502 }
503 
504 static int
softpipe_get_compute_param(struct pipe_screen * _screen,enum pipe_shader_ir ir_type,enum pipe_compute_cap param,void * ret)505 softpipe_get_compute_param(struct pipe_screen *_screen,
506                            enum pipe_shader_ir ir_type,
507                            enum pipe_compute_cap param,
508                            void *ret)
509 {
510    switch (param) {
511    case PIPE_COMPUTE_CAP_IR_TARGET:
512       return 0;
513    case PIPE_COMPUTE_CAP_MAX_GRID_SIZE:
514       if (ret) {
515          uint64_t *grid_size = ret;
516          grid_size[0] = 65535;
517          grid_size[1] = 65535;
518          grid_size[2] = 65535;
519       }
520       return 3 * sizeof(uint64_t) ;
521    case PIPE_COMPUTE_CAP_MAX_BLOCK_SIZE:
522       if (ret) {
523          uint64_t *block_size = ret;
524          block_size[0] = 1024;
525          block_size[1] = 1024;
526          block_size[2] = 1024;
527       }
528       return 3 * sizeof(uint64_t);
529    case PIPE_COMPUTE_CAP_MAX_THREADS_PER_BLOCK:
530       if (ret) {
531          uint64_t *max_threads_per_block = ret;
532          *max_threads_per_block = 1024;
533       }
534       return sizeof(uint64_t);
535    case PIPE_COMPUTE_CAP_MAX_LOCAL_SIZE:
536       if (ret) {
537          uint64_t *max_local_size = ret;
538          *max_local_size = 32768;
539       }
540       return sizeof(uint64_t);
541    case PIPE_COMPUTE_CAP_GRID_DIMENSION:
542    case PIPE_COMPUTE_CAP_MAX_GLOBAL_SIZE:
543    case PIPE_COMPUTE_CAP_MAX_PRIVATE_SIZE:
544    case PIPE_COMPUTE_CAP_MAX_INPUT_SIZE:
545    case PIPE_COMPUTE_CAP_MAX_MEM_ALLOC_SIZE:
546    case PIPE_COMPUTE_CAP_MAX_CLOCK_FREQUENCY:
547    case PIPE_COMPUTE_CAP_MAX_COMPUTE_UNITS:
548    case PIPE_COMPUTE_CAP_IMAGES_SUPPORTED:
549    case PIPE_COMPUTE_CAP_SUBGROUP_SIZE:
550    case PIPE_COMPUTE_CAP_ADDRESS_BITS:
551    case PIPE_COMPUTE_CAP_MAX_VARIABLE_THREADS_PER_BLOCK:
552       break;
553    }
554    return 0;
555 }
556 
557 /**
558  * Create a new pipe_screen object
559  * Note: we're not presently subclassing pipe_screen (no softpipe_screen).
560  */
561 struct pipe_screen *
softpipe_create_screen(struct sw_winsys * winsys)562 softpipe_create_screen(struct sw_winsys *winsys)
563 {
564    struct softpipe_screen *screen = CALLOC_STRUCT(softpipe_screen);
565 
566    if (!screen)
567       return NULL;
568 
569    sp_debug = debug_get_option_sp_debug();
570 
571    screen->winsys = winsys;
572 
573    screen->base.destroy = softpipe_destroy_screen;
574 
575    screen->base.get_name = softpipe_get_name;
576    screen->base.get_vendor = softpipe_get_vendor;
577    screen->base.get_device_vendor = softpipe_get_vendor; // TODO should be the CPU vendor
578    screen->base.get_param = softpipe_get_param;
579    screen->base.get_shader_param = softpipe_get_shader_param;
580    screen->base.get_paramf = softpipe_get_paramf;
581    screen->base.get_timestamp = softpipe_get_timestamp;
582    screen->base.is_format_supported = softpipe_is_format_supported;
583    screen->base.context_create = softpipe_create_context;
584    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;
585    screen->base.get_compute_param = softpipe_get_compute_param;
586    screen->base.get_compiler_options = softpipe_get_compiler_options;
587    screen->use_llvm = sp_debug & SP_DBG_USE_LLVM;
588 
589    softpipe_init_screen_texture_funcs(&screen->base);
590    softpipe_init_screen_fence_funcs(&screen->base);
591 
592    return &screen->base;
593 }
594