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1 /*
2  * Copyright (C) 2008 VMware, Inc.
3  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
4  * Copyright (C) 2014-2017 Broadcom
5  * Copyright (C) 2018-2019 Alyssa Rosenzweig
6  * Copyright (C) 2019 Collabora, Ltd.
7  *
8  * Permission is hereby granted, free of charge, to any person obtaining a
9  * copy of this software and associated documentation files (the "Software"),
10  * to deal in the Software without restriction, including without limitation
11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12  * and/or sell copies of the Software, and to permit persons to whom the
13  * Software is furnished to do so, subject to the following conditions:
14  *
15  * The above copyright notice and this permission notice (including the next
16  * paragraph) shall be included in all copies or substantial portions of the
17  * Software.
18  *
19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25  * SOFTWARE.
26  *
27  * Authors (Collabora):
28  *   Tomeu Vizoso <tomeu.vizoso@collabora.com>
29  *   Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
30  *
31  */
32 
33 #include <xf86drm.h>
34 #include <fcntl.h>
35 #include "drm-uapi/drm_fourcc.h"
36 
37 #include "frontend/winsys_handle.h"
38 #include "util/format/u_format.h"
39 #include "util/u_memory.h"
40 #include "util/u_surface.h"
41 #include "util/u_transfer.h"
42 #include "util/u_transfer_helper.h"
43 #include "util/u_gen_mipmap.h"
44 #include "util/u_drm.h"
45 
46 #include "pan_bo.h"
47 #include "pan_context.h"
48 #include "pan_screen.h"
49 #include "pan_resource.h"
50 #include "pan_util.h"
51 #include "pan_tiling.h"
52 #include "decode.h"
53 
54 static bool
55 panfrost_should_checksum(const struct panfrost_device *dev, const struct panfrost_resource *pres);
56 
57 static struct pipe_resource *
panfrost_resource_from_handle(struct pipe_screen * pscreen,const struct pipe_resource * templat,struct winsys_handle * whandle,unsigned usage)58 panfrost_resource_from_handle(struct pipe_screen *pscreen,
59                               const struct pipe_resource *templat,
60                               struct winsys_handle *whandle,
61                               unsigned usage)
62 {
63         struct panfrost_device *dev = pan_device(pscreen);
64         struct panfrost_resource *rsc;
65         struct pipe_resource *prsc;
66 
67         assert(whandle->type == WINSYS_HANDLE_TYPE_FD);
68 
69         rsc = CALLOC_STRUCT(panfrost_resource);
70         if (!rsc)
71                 return NULL;
72 
73         prsc = &rsc->base;
74 
75         *prsc = *templat;
76 
77         pipe_reference_init(&prsc->reference, 1);
78         prsc->screen = pscreen;
79 
80         uint64_t mod = whandle->modifier == DRM_FORMAT_MOD_INVALID ?
81                        DRM_FORMAT_MOD_LINEAR : whandle->modifier;
82         enum mali_texture_dimension dim =
83                 panfrost_translate_texture_dimension(templat->target);
84         enum pan_image_crc_mode crc_mode =
85                 panfrost_should_checksum(dev, rsc) ?
86                 PAN_IMAGE_CRC_OOB : PAN_IMAGE_CRC_NONE;
87         struct pan_image_explicit_layout explicit_layout = {
88                 .offset = whandle->offset,
89                 .row_stride = panfrost_from_legacy_stride(whandle->stride, templat->format, mod)
90         };
91 
92         rsc->image.layout = (struct pan_image_layout) {
93                 .modifier = mod,
94                 .format = templat->format,
95                 .dim = dim,
96                 .width = prsc->width0,
97                 .height = prsc->height0,
98                 .depth = prsc->depth0,
99                 .array_size = prsc->array_size,
100                 .nr_samples = MAX2(prsc->nr_samples, 1),
101                 .nr_slices = 1,
102                 .crc_mode = crc_mode
103         };
104 
105         bool valid = pan_image_layout_init(&rsc->image.layout, &explicit_layout);
106 
107         if (!valid) {
108                 FREE(rsc);
109                 return NULL;
110         }
111 
112         rsc->image.data.bo = panfrost_bo_import(dev, whandle->handle);
113         /* Sometimes an import can fail e.g. on an invalid buffer fd, out of
114          * memory space to mmap it etc.
115          */
116         if (!rsc->image.data.bo) {
117                 FREE(rsc);
118                 return NULL;
119         }
120         if (rsc->image.layout.crc_mode == PAN_IMAGE_CRC_OOB)
121                 rsc->image.crc.bo = panfrost_bo_create(dev, rsc->image.layout.crc_size, 0, "CRC data");
122 
123         rsc->modifier_constant = true;
124 
125         BITSET_SET(rsc->valid.data, 0);
126         panfrost_resource_set_damage_region(pscreen, &rsc->base, 0, NULL);
127 
128         if (dev->ro) {
129                 rsc->scanout =
130                         renderonly_create_gpu_import_for_resource(prsc, dev->ro, NULL);
131                 /* failure is expected in some cases.. */
132         }
133 
134         return prsc;
135 }
136 
137 static bool
panfrost_resource_get_handle(struct pipe_screen * pscreen,struct pipe_context * ctx,struct pipe_resource * pt,struct winsys_handle * handle,unsigned usage)138 panfrost_resource_get_handle(struct pipe_screen *pscreen,
139                              struct pipe_context *ctx,
140                              struct pipe_resource *pt,
141                              struct winsys_handle *handle,
142                              unsigned usage)
143 {
144         struct panfrost_device *dev = pan_device(pscreen);
145         struct panfrost_resource *rsrc;
146         struct renderonly_scanout *scanout;
147         struct pipe_resource *cur = pt;
148 
149         /* Even though panfrost doesn't support multi-planar formats, we
150          * can get here through GBM, which does. Walk the list of planes
151          * to find the right one.
152          */
153         for (int i = 0; i < handle->plane; i++) {
154                 cur = cur->next;
155                 if (!cur)
156                         return false;
157         }
158         rsrc = pan_resource(cur);
159         scanout = rsrc->scanout;
160 
161         handle->modifier = rsrc->image.layout.modifier;
162         rsrc->modifier_constant = true;
163 
164         if (handle->type == WINSYS_HANDLE_TYPE_KMS && dev->ro) {
165                 return renderonly_get_handle(scanout, handle);
166         } else if (handle->type == WINSYS_HANDLE_TYPE_KMS) {
167                 handle->handle = rsrc->image.data.bo->gem_handle;
168         } else if (handle->type == WINSYS_HANDLE_TYPE_FD) {
169                 int fd = panfrost_bo_export(rsrc->image.data.bo);
170 
171                 if (fd < 0)
172                         return false;
173 
174                 handle->handle = fd;
175         } else {
176                 /* Other handle types not supported */
177                 return false;
178         }
179 
180         handle->stride = panfrost_get_legacy_stride(&rsrc->image.layout, 0);
181         handle->offset = rsrc->image.layout.slices[0].offset;
182         return true;
183 }
184 
185 static bool
panfrost_resource_get_param(struct pipe_screen * pscreen,struct pipe_context * pctx,struct pipe_resource * prsc,unsigned plane,unsigned layer,unsigned level,enum pipe_resource_param param,unsigned usage,uint64_t * value)186 panfrost_resource_get_param(struct pipe_screen *pscreen,
187                             struct pipe_context *pctx, struct pipe_resource *prsc,
188                             unsigned plane, unsigned layer, unsigned level,
189                             enum pipe_resource_param param,
190                             unsigned usage, uint64_t *value)
191 {
192         struct panfrost_resource *rsrc = (struct panfrost_resource *) prsc;
193         struct pipe_resource *cur;
194         unsigned count;
195 
196         switch (param) {
197         case PIPE_RESOURCE_PARAM_STRIDE:
198                 *value = panfrost_get_legacy_stride(&rsrc->image.layout, level);
199                 return true;
200         case PIPE_RESOURCE_PARAM_OFFSET:
201                 *value = rsrc->image.layout.slices[level].offset;
202                 return true;
203         case PIPE_RESOURCE_PARAM_MODIFIER:
204                 *value = rsrc->image.layout.modifier;
205                 return true;
206         case PIPE_RESOURCE_PARAM_NPLANES:
207                 /* Panfrost doesn't directly support multi-planar formats,
208                  * but we should still handle this case for gbm users
209                  * that might want to use resources shared with panfrost
210                  * on video processing hardware that does.
211                  */
212                 for (count = 0, cur = prsc; cur; cur = cur->next)
213                         count++;
214                 *value = count;
215                 return true;
216         default:
217                 return false;
218         }
219 }
220 
221 static void
panfrost_flush_resource(struct pipe_context * pctx,struct pipe_resource * prsc)222 panfrost_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
223 {
224         /* TODO */
225 }
226 
227 static struct pipe_surface *
panfrost_create_surface(struct pipe_context * pipe,struct pipe_resource * pt,const struct pipe_surface * surf_tmpl)228 panfrost_create_surface(struct pipe_context *pipe,
229                         struct pipe_resource *pt,
230                         const struct pipe_surface *surf_tmpl)
231 {
232         struct panfrost_context *ctx = pan_context(pipe);
233         struct pipe_surface *ps = NULL;
234 
235         pan_legalize_afbc_format(ctx, pan_resource(pt), surf_tmpl->format);
236 
237         ps = CALLOC_STRUCT(pipe_surface);
238 
239         if (ps) {
240                 pipe_reference_init(&ps->reference, 1);
241                 pipe_resource_reference(&ps->texture, pt);
242                 ps->context = pipe;
243                 ps->format = surf_tmpl->format;
244 
245                 if (pt->target != PIPE_BUFFER) {
246                         assert(surf_tmpl->u.tex.level <= pt->last_level);
247                         ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
248                         ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
249                         ps->nr_samples = surf_tmpl->nr_samples;
250                         ps->u.tex.level = surf_tmpl->u.tex.level;
251                         ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
252                         ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
253                 } else {
254                         /* setting width as number of elements should get us correct renderbuffer width */
255                         ps->width = surf_tmpl->u.buf.last_element - surf_tmpl->u.buf.first_element + 1;
256                         ps->height = pt->height0;
257                         ps->u.buf.first_element = surf_tmpl->u.buf.first_element;
258                         ps->u.buf.last_element = surf_tmpl->u.buf.last_element;
259                         assert(ps->u.buf.first_element <= ps->u.buf.last_element);
260                         assert(ps->u.buf.last_element < ps->width);
261                 }
262         }
263 
264         return ps;
265 }
266 
267 static void
panfrost_surface_destroy(struct pipe_context * pipe,struct pipe_surface * surf)268 panfrost_surface_destroy(struct pipe_context *pipe,
269                          struct pipe_surface *surf)
270 {
271         assert(surf->texture);
272         pipe_resource_reference(&surf->texture, NULL);
273         free(surf);
274 }
275 
276 static inline bool
panfrost_is_2d(const struct panfrost_resource * pres)277 panfrost_is_2d(const struct panfrost_resource *pres)
278 {
279         return (pres->base.target == PIPE_TEXTURE_2D)
280                 || (pres->base.target == PIPE_TEXTURE_RECT);
281 }
282 
283 /* Based on the usage, determine if it makes sense to use u-inteleaved tiling.
284  * We only have routines to tile 2D textures of sane bpps. On the hardware
285  * level, not all usages are valid for tiling. Finally, if the app is hinting
286  * that the contents frequently change, tiling will be a loss.
287  *
288  * On platforms where it is supported, AFBC is even better. */
289 
290 static bool
panfrost_should_afbc(struct panfrost_device * dev,const struct panfrost_resource * pres,enum pipe_format fmt)291 panfrost_should_afbc(struct panfrost_device *dev,
292                      const struct panfrost_resource *pres,
293                      enum pipe_format fmt)
294 {
295         /* AFBC resources may be rendered to, textured from, or shared across
296          * processes, but may not be used as e.g buffers */
297         const unsigned valid_binding =
298                 PIPE_BIND_DEPTH_STENCIL |
299                 PIPE_BIND_RENDER_TARGET |
300                 PIPE_BIND_BLENDABLE |
301                 PIPE_BIND_SAMPLER_VIEW |
302                 PIPE_BIND_DISPLAY_TARGET |
303                 PIPE_BIND_SCANOUT |
304                 PIPE_BIND_SHARED;
305 
306         if (pres->base.bind & ~valid_binding)
307                 return false;
308 
309         /* AFBC support is optional */
310         if (!dev->has_afbc)
311                 return false;
312 
313         /* AFBC<-->staging is expensive */
314         if (pres->base.usage == PIPE_USAGE_STREAM)
315                 return false;
316 
317         /* Only a small selection of formats are AFBC'able */
318         if (!panfrost_format_supports_afbc(dev, fmt))
319                 return false;
320 
321         /* AFBC does not support layered (GLES3 style) multisampling. Use
322          * EXT_multisampled_render_to_texture instead */
323         if (pres->base.nr_samples > 1)
324                 return false;
325 
326         switch (pres->base.target) {
327         case PIPE_TEXTURE_2D:
328         case PIPE_TEXTURE_2D_ARRAY:
329         case PIPE_TEXTURE_RECT:
330                 break;
331 
332         case PIPE_TEXTURE_3D:
333                 /* 3D AFBC is only supported on Bifrost v7+. It's supposed to
334                  * be supported on Midgard but it doesn't seem to work */
335                 if (dev->arch != 7)
336                         return false;
337 
338                 break;
339 
340         default:
341                 return false;
342         }
343 
344         /* For one tile, AFBC is a loss compared to u-interleaved */
345         if (pres->base.width0 <= 16 && pres->base.height0 <= 16)
346                 return false;
347 
348         /* Otherwise, we'd prefer AFBC as it is dramatically more efficient
349          * than linear or usually even u-interleaved */
350         return true;
351 }
352 
353 /*
354  * For a resource we want to use AFBC with, should we use AFBC with tiled
355  * headers? On GPUs that support it, this is believed to be beneficial for
356  * images that are at least 128x128.
357  */
358 static bool
panfrost_should_tile_afbc(const struct panfrost_device * dev,const struct panfrost_resource * pres)359 panfrost_should_tile_afbc(const struct panfrost_device *dev,
360                           const struct panfrost_resource *pres)
361 {
362         return panfrost_afbc_can_tile(dev) &&
363                pres->base.width0 >= 128 &&
364                pres->base.height0 >= 128;
365 }
366 
367 static bool
panfrost_should_tile(struct panfrost_device * dev,const struct panfrost_resource * pres,enum pipe_format fmt)368 panfrost_should_tile(struct panfrost_device *dev,
369                      const struct panfrost_resource *pres,
370                      enum pipe_format fmt)
371 {
372         const unsigned valid_binding =
373                 PIPE_BIND_DEPTH_STENCIL |
374                 PIPE_BIND_RENDER_TARGET |
375                 PIPE_BIND_BLENDABLE |
376                 PIPE_BIND_SAMPLER_VIEW |
377                 PIPE_BIND_DISPLAY_TARGET |
378                 PIPE_BIND_SCANOUT |
379                 PIPE_BIND_SHARED;
380 
381         /* The purpose of tiling is improving locality in both X- and
382          * Y-directions. If there is only a single pixel in either direction,
383          * tiling does not make sense; using a linear layout instead is optimal
384          * for both memory usage and performance.
385          */
386         if (MIN2(pres->base.width0, pres->base.height0) < 2)
387                 return false;
388 
389         bool can_tile = (pres->base.target != PIPE_BUFFER)
390                 && ((pres->base.bind & ~valid_binding) == 0);
391 
392         return can_tile && (pres->base.usage != PIPE_USAGE_STREAM);
393 }
394 
395 static uint64_t
panfrost_best_modifier(struct panfrost_device * dev,const struct panfrost_resource * pres,enum pipe_format fmt)396 panfrost_best_modifier(struct panfrost_device *dev,
397                        const struct panfrost_resource *pres,
398                        enum pipe_format fmt)
399 {
400         /* Force linear textures when debugging tiling/compression */
401         if (unlikely(dev->debug & PAN_DBG_LINEAR))
402                 return DRM_FORMAT_MOD_LINEAR;
403 
404         if (panfrost_should_afbc(dev, pres, fmt)) {
405                 uint64_t afbc =
406                         AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 |
407                         AFBC_FORMAT_MOD_SPARSE;
408 
409                 if (panfrost_afbc_can_ytr(pres->base.format))
410                         afbc |= AFBC_FORMAT_MOD_YTR;
411 
412                 if (panfrost_should_tile_afbc(dev, pres))
413                         afbc |= AFBC_FORMAT_MOD_TILED | AFBC_FORMAT_MOD_SC;
414 
415                 return DRM_FORMAT_MOD_ARM_AFBC(afbc);
416         } else if (panfrost_should_tile(dev, pres, fmt))
417                 return DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED;
418         else
419                 return DRM_FORMAT_MOD_LINEAR;
420 }
421 
422 static bool
panfrost_should_checksum(const struct panfrost_device * dev,const struct panfrost_resource * pres)423 panfrost_should_checksum(const struct panfrost_device *dev, const struct panfrost_resource *pres)
424 {
425         /* When checksumming is enabled, the tile data must fit in the
426          * size of the writeback buffer, so don't checksum formats
427          * that use too much space. */
428 
429         unsigned bytes_per_pixel_max = (dev->arch == 6) ? 6 : 4;
430 
431         unsigned bytes_per_pixel = MAX2(pres->base.nr_samples, 1) *
432                 util_format_get_blocksize(pres->base.format);
433 
434         return pres->base.bind & PIPE_BIND_RENDER_TARGET &&
435                 panfrost_is_2d(pres) &&
436                 bytes_per_pixel <= bytes_per_pixel_max &&
437                 pres->base.last_level == 0 &&
438                 !(dev->debug & PAN_DBG_NO_CRC);
439 }
440 
441 static void
panfrost_resource_setup(struct panfrost_device * dev,struct panfrost_resource * pres,uint64_t modifier,enum pipe_format fmt)442 panfrost_resource_setup(struct panfrost_device *dev,
443                         struct panfrost_resource *pres,
444                         uint64_t modifier, enum pipe_format fmt)
445 {
446         uint64_t chosen_mod = modifier != DRM_FORMAT_MOD_INVALID ?
447                               modifier : panfrost_best_modifier(dev, pres, fmt);
448         enum pan_image_crc_mode crc_mode =
449                 panfrost_should_checksum(dev, pres) ?
450                 PAN_IMAGE_CRC_INBAND : PAN_IMAGE_CRC_NONE;
451         enum mali_texture_dimension dim =
452                 panfrost_translate_texture_dimension(pres->base.target);
453 
454         /* We can only switch tiled->linear if the resource isn't already
455          * linear and if we control the modifier */
456         pres->modifier_constant =
457                 !(chosen_mod != DRM_FORMAT_MOD_LINEAR &&
458                   modifier == DRM_FORMAT_MOD_INVALID);
459 
460         /* Z32_S8X24 variants are actually stored in 2 planes (one per
461          * component), we have to adjust the format on the first plane.
462          */
463         if (fmt == PIPE_FORMAT_Z32_FLOAT_S8X24_UINT)
464                 fmt = PIPE_FORMAT_Z32_FLOAT;
465 
466         pres->image.layout = (struct pan_image_layout) {
467                 .modifier = chosen_mod,
468                 .format = fmt,
469                 .dim = dim,
470                 .width = pres->base.width0,
471                 .height = pres->base.height0,
472                 .depth = pres->base.depth0,
473                 .array_size = pres->base.array_size,
474                 .nr_samples = MAX2(pres->base.nr_samples, 1),
475                 .nr_slices = pres->base.last_level + 1,
476                 .crc_mode = crc_mode
477         };
478 
479         ASSERTED bool valid = pan_image_layout_init(&pres->image.layout, NULL);
480         assert(valid);
481 }
482 
483 static void
panfrost_resource_init_afbc_headers(struct panfrost_resource * pres)484 panfrost_resource_init_afbc_headers(struct panfrost_resource *pres)
485 {
486         panfrost_bo_mmap(pres->image.data.bo);
487 
488         unsigned nr_samples = MAX2(pres->base.nr_samples, 1);
489 
490         for (unsigned i = 0; i < pres->base.array_size; ++i) {
491                 for (unsigned l = 0; l <= pres->base.last_level; ++l) {
492                         struct pan_image_slice_layout *slice = &pres->image.layout.slices[l];
493 
494                         for (unsigned s = 0; s < nr_samples; ++s) {
495                                 void *ptr = pres->image.data.bo->ptr.cpu +
496                                             (i * pres->image.layout.array_stride) +
497                                             slice->offset +
498                                             (s * slice->afbc.surface_stride);
499 
500                                 /* Zero-ed AFBC headers seem to encode a plain
501                                  * black. Let's use this pattern to keep the
502                                  * initialization simple.
503                                  */
504                                 memset(ptr, 0, slice->afbc.header_size);
505                         }
506                 }
507         }
508 }
509 
510 void
panfrost_resource_set_damage_region(struct pipe_screen * screen,struct pipe_resource * res,unsigned int nrects,const struct pipe_box * rects)511 panfrost_resource_set_damage_region(struct pipe_screen *screen,
512                                     struct pipe_resource *res,
513                                     unsigned int nrects,
514                                     const struct pipe_box *rects)
515 {
516         struct panfrost_device *dev = pan_device(screen);
517         struct panfrost_resource *pres = pan_resource(res);
518         struct pipe_scissor_state *damage_extent = &pres->damage.extent;
519         unsigned int i;
520 
521         /* Partial updates are implemented with a tile enable map only on v5.
522          * Later architectures have a more efficient method of implementing
523          * partial updates (frame shaders), while earlier architectures lack
524          * tile enable maps altogether.
525          */
526         if (dev->arch == 5 && nrects > 1) {
527                 if (!pres->damage.tile_map.data) {
528                         pres->damage.tile_map.stride =
529                                 ALIGN_POT(DIV_ROUND_UP(res->width0, 32 * 8), 64);
530                         pres->damage.tile_map.size =
531                                 pres->damage.tile_map.stride *
532                                 DIV_ROUND_UP(res->height0, 32);
533                         pres->damage.tile_map.data =
534                                 malloc(pres->damage.tile_map.size);
535                 }
536 
537                 memset(pres->damage.tile_map.data, 0, pres->damage.tile_map.size);
538                 pres->damage.tile_map.enable = true;
539         } else {
540                 pres->damage.tile_map.enable = false;
541         }
542 
543         /* Track the damage extent: the quad including all damage regions. Will
544          * be used restrict the rendering area */
545 
546         damage_extent->minx = 0xffff;
547         damage_extent->miny = 0xffff;
548 
549         unsigned enable_count = 0;
550 
551         for (i = 0; i < nrects; i++) {
552                 int x = rects[i].x, w = rects[i].width, h = rects[i].height;
553                 int y = res->height0 - (rects[i].y + h);
554 
555                 damage_extent->minx = MIN2(damage_extent->minx, x);
556                 damage_extent->miny = MIN2(damage_extent->miny, y);
557                 damage_extent->maxx = MAX2(damage_extent->maxx,
558                                            MIN2(x + w, res->width0));
559                 damage_extent->maxy = MAX2(damage_extent->maxy,
560                                            MIN2(y + h, res->height0));
561 
562                 if (!pres->damage.tile_map.enable)
563                         continue;
564 
565                 unsigned t_x_start = x / 32;
566                 unsigned t_x_end = (x + w - 1) / 32;
567                 unsigned t_y_start = y / 32;
568                 unsigned t_y_end = (y + h - 1) / 32;
569 
570                 for (unsigned t_y = t_y_start; t_y <= t_y_end; t_y++) {
571                         for (unsigned t_x = t_x_start; t_x <= t_x_end; t_x++) {
572                                 unsigned b = (t_y * pres->damage.tile_map.stride * 8) + t_x;
573 
574                                 if (BITSET_TEST(pres->damage.tile_map.data, b))
575                                         continue;
576 
577                                 BITSET_SET(pres->damage.tile_map.data, b);
578                                 enable_count++;
579                         }
580                 }
581         }
582 
583         if (nrects == 0) {
584                 damage_extent->minx = 0;
585                 damage_extent->miny = 0;
586                 damage_extent->maxx = res->width0;
587                 damage_extent->maxy = res->height0;
588         }
589 
590         if (pres->damage.tile_map.enable) {
591                 unsigned t_x_start = damage_extent->minx / 32;
592                 unsigned t_x_end = damage_extent->maxx / 32;
593                 unsigned t_y_start = damage_extent->miny / 32;
594                 unsigned t_y_end = damage_extent->maxy / 32;
595                 unsigned tile_count = (t_x_end - t_x_start + 1) *
596                                       (t_y_end - t_y_start + 1);
597 
598                 /* Don't bother passing a tile-enable-map if the amount of
599                  * tiles to reload is to close to the total number of tiles.
600                  */
601                 if (tile_count - enable_count < 10)
602                         pres->damage.tile_map.enable = false;
603         }
604 
605 }
606 
607 static struct pipe_resource *
panfrost_resource_create_with_modifier(struct pipe_screen * screen,const struct pipe_resource * template,uint64_t modifier)608 panfrost_resource_create_with_modifier(struct pipe_screen *screen,
609                          const struct pipe_resource *template,
610                          uint64_t modifier)
611 {
612         struct panfrost_device *dev = pan_device(screen);
613 
614         struct panfrost_resource *so = CALLOC_STRUCT(panfrost_resource);
615         so->base = *template;
616         so->base.screen = screen;
617 
618         pipe_reference_init(&so->base.reference, 1);
619 
620         util_range_init(&so->valid_buffer_range);
621 
622         if (template->bind & PAN_BIND_SHARED_MASK) {
623                 /* For compatibility with older consumers that may not be
624                  * modifiers aware, treat INVALID as LINEAR for shared
625                  * resources.
626                  */
627                 if (modifier == DRM_FORMAT_MOD_INVALID)
628                         modifier = DRM_FORMAT_MOD_LINEAR;
629 
630                 /* At any rate, we can't change the modifier later for shared
631                  * resources, since we have no way to propagate the modifier
632                  * change.
633                  */
634                 so->modifier_constant = true;
635         }
636 
637         panfrost_resource_setup(dev, so, modifier, template->format);
638 
639         /* Guess a label based on the bind */
640         unsigned bind = template->bind;
641         const char *label =
642                 (bind & PIPE_BIND_INDEX_BUFFER) ? "Index buffer" :
643                 (bind & PIPE_BIND_SCANOUT) ? "Scanout" :
644                 (bind & PIPE_BIND_DISPLAY_TARGET) ? "Display target" :
645                 (bind & PIPE_BIND_SHARED) ? "Shared resource" :
646                 (bind & PIPE_BIND_RENDER_TARGET) ? "Render target" :
647                 (bind & PIPE_BIND_DEPTH_STENCIL) ? "Depth/stencil buffer" :
648                 (bind & PIPE_BIND_SAMPLER_VIEW) ? "Texture" :
649                 (bind & PIPE_BIND_VERTEX_BUFFER) ? "Vertex buffer" :
650                 (bind & PIPE_BIND_CONSTANT_BUFFER) ? "Constant buffer" :
651                 (bind & PIPE_BIND_GLOBAL) ? "Global memory" :
652                 (bind & PIPE_BIND_SHADER_BUFFER) ? "Shader buffer" :
653                 (bind & PIPE_BIND_SHADER_IMAGE) ? "Shader image" :
654                 "Other resource";
655 
656         if (dev->ro && (template->bind & PIPE_BIND_SCANOUT)) {
657                 struct winsys_handle handle;
658                 struct pan_block_size blocksize = panfrost_block_size(modifier, template->format);
659 
660                 /* Block-based texture formats are only used for texture
661                  * compression (not framebuffer compression!), which doesn't
662                  * make sense to share across processes.
663                  */
664                 assert(util_format_get_blockwidth(template->format) == 1);
665                 assert(util_format_get_blockheight(template->format) == 1);
666 
667                 /* Present a resource with similar dimensions that, if allocated
668                  * as a linear image, is big enough to fit the resource in the
669                  * actual layout. For linear images, this is a no-op. For 16x16
670                  * tiling, this aligns the dimensions to 16x16.
671                  *
672                  * For AFBC, this aligns the width to the superblock width (as
673                  * expected) and adds extra rows to account for the header. This
674                  * is a bit of a lie, but it's the best we can do with dumb
675                  * buffers, which are extremely not meant for AFBC. And yet this
676                  * has to work anyway...
677                  *
678                  * Moral of the story: if you're reading this comment, that
679                  * means you're working on WSI and so it's already too late for
680                  * you. I'm sorry.
681                  */
682                 unsigned width = ALIGN_POT(template->width0, blocksize.width);
683                 unsigned stride = ALIGN_POT(template->width0, blocksize.width) *
684                                   util_format_get_blocksize(template->format);
685                 unsigned size = so->image.layout.data_size;
686                 unsigned effective_rows = DIV_ROUND_UP(size, stride);
687 
688                 struct pipe_resource scanout_tmpl = {
689                         .target = so->base.target,
690                         .format = template->format,
691                         .width0 = width,
692                         .height0 = effective_rows,
693                         .depth0 = 1,
694                         .array_size = 1,
695                 };
696 
697                 so->scanout =
698                         renderonly_scanout_for_resource(&scanout_tmpl,
699                                                         dev->ro,
700                                                         &handle);
701 
702                 if (!so->scanout) {
703                         fprintf(stderr, "Failed to create scanout resource\n");
704                         free(so);
705                         return NULL;
706                 }
707                 assert(handle.type == WINSYS_HANDLE_TYPE_FD);
708                 so->image.data.bo = panfrost_bo_import(dev, handle.handle);
709                 close(handle.handle);
710 
711                 if (!so->image.data.bo) {
712                         free(so);
713                         return NULL;
714                 }
715         } else {
716                 /* We create a BO immediately but don't bother mapping, since we don't
717                  * care to map e.g. FBOs which the CPU probably won't touch */
718 
719                 so->image.data.bo =
720                         panfrost_bo_create(dev, so->image.layout.data_size, PAN_BO_DELAY_MMAP, label);
721 
722                 so->constant_stencil = true;
723         }
724 
725         if (drm_is_afbc(so->image.layout.modifier))
726                 panfrost_resource_init_afbc_headers(so);
727 
728         panfrost_resource_set_damage_region(screen, &so->base, 0, NULL);
729 
730         if (template->bind & PIPE_BIND_INDEX_BUFFER)
731                 so->index_cache = CALLOC_STRUCT(panfrost_minmax_cache);
732 
733         return (struct pipe_resource *)so;
734 }
735 
736 /* Default is to create a resource as don't care */
737 
738 static struct pipe_resource *
panfrost_resource_create(struct pipe_screen * screen,const struct pipe_resource * template)739 panfrost_resource_create(struct pipe_screen *screen,
740                          const struct pipe_resource *template)
741 {
742         return panfrost_resource_create_with_modifier(screen, template,
743                         DRM_FORMAT_MOD_INVALID);
744 }
745 
746 /* If no modifier is specified, we'll choose. Otherwise, the order of
747  * preference is compressed, tiled, linear. */
748 
749 static struct pipe_resource *
panfrost_resource_create_with_modifiers(struct pipe_screen * screen,const struct pipe_resource * template,const uint64_t * modifiers,int count)750 panfrost_resource_create_with_modifiers(struct pipe_screen *screen,
751                          const struct pipe_resource *template,
752                          const uint64_t *modifiers, int count)
753 {
754         for (unsigned i = 0; i < PAN_MODIFIER_COUNT; ++i) {
755                 if (drm_find_modifier(pan_best_modifiers[i], modifiers, count)) {
756                         return panfrost_resource_create_with_modifier(screen, template,
757                                         pan_best_modifiers[i]);
758                 }
759         }
760 
761         /* If we didn't find one, app specified invalid */
762         assert(count == 1 && modifiers[0] == DRM_FORMAT_MOD_INVALID);
763         return panfrost_resource_create(screen, template);
764 }
765 
766 static void
panfrost_resource_destroy(struct pipe_screen * screen,struct pipe_resource * pt)767 panfrost_resource_destroy(struct pipe_screen *screen,
768                           struct pipe_resource *pt)
769 {
770         struct panfrost_device *dev = pan_device(screen);
771         struct panfrost_resource *rsrc = (struct panfrost_resource *) pt;
772 
773         if (rsrc->scanout)
774                 renderonly_scanout_destroy(rsrc->scanout, dev->ro);
775 
776         if (rsrc->image.data.bo)
777                 panfrost_bo_unreference(rsrc->image.data.bo);
778 
779         if (rsrc->image.crc.bo)
780                 panfrost_bo_unreference(rsrc->image.crc.bo);
781 
782         free(rsrc->index_cache);
783         free(rsrc->damage.tile_map.data);
784 
785         util_range_destroy(&rsrc->valid_buffer_range);
786         free(rsrc);
787 }
788 
789 /* Most of the time we can do CPU-side transfers, but sometimes we need to use
790  * the 3D pipe for this. Let's wrap u_blitter to blit to/from staging textures.
791  * Code adapted from freedreno */
792 
793 static struct panfrost_resource *
pan_alloc_staging(struct panfrost_context * ctx,struct panfrost_resource * rsc,unsigned level,const struct pipe_box * box)794 pan_alloc_staging(struct panfrost_context *ctx, struct panfrost_resource *rsc,
795 		unsigned level, const struct pipe_box *box)
796 {
797         struct pipe_context *pctx = &ctx->base;
798         struct pipe_resource tmpl = rsc->base;
799 
800         tmpl.width0  = box->width;
801         tmpl.height0 = box->height;
802         /* for array textures, box->depth is the array_size, otherwise
803          * for 3d textures, it is the depth:
804          */
805         if (tmpl.array_size > 1) {
806                 if (tmpl.target == PIPE_TEXTURE_CUBE)
807                         tmpl.target = PIPE_TEXTURE_2D_ARRAY;
808                 tmpl.array_size = box->depth;
809                 tmpl.depth0 = 1;
810         } else {
811                 tmpl.array_size = 1;
812                 tmpl.depth0 = box->depth;
813         }
814         tmpl.last_level = 0;
815         tmpl.bind |= PIPE_BIND_LINEAR;
816         tmpl.bind &= ~PAN_BIND_SHARED_MASK;
817 
818         struct pipe_resource *pstaging =
819                 pctx->screen->resource_create(pctx->screen, &tmpl);
820         if (!pstaging)
821                 return NULL;
822 
823         return pan_resource(pstaging);
824 }
825 
826 static enum pipe_format
pan_blit_format(enum pipe_format fmt)827 pan_blit_format(enum pipe_format fmt)
828 {
829         const struct util_format_description *desc;
830         desc = util_format_description(fmt);
831 
832         /* This must be an emulated format (using u_transfer_helper) as if it
833          * was real RGTC we wouldn't have used AFBC and needed a blit. */
834         if (desc->layout == UTIL_FORMAT_LAYOUT_RGTC)
835                 fmt = PIPE_FORMAT_R8G8B8A8_UNORM;
836 
837         return fmt;
838 }
839 
840 static void
pan_blit_from_staging(struct pipe_context * pctx,struct panfrost_transfer * trans)841 pan_blit_from_staging(struct pipe_context *pctx, struct panfrost_transfer *trans)
842 {
843         struct pipe_resource *dst = trans->base.resource;
844         struct pipe_blit_info blit = {0};
845 
846         blit.dst.resource = dst;
847         blit.dst.format   = pan_blit_format(dst->format);
848         blit.dst.level    = trans->base.level;
849         blit.dst.box      = trans->base.box;
850         blit.src.resource = trans->staging.rsrc;
851         blit.src.format   = pan_blit_format(trans->staging.rsrc->format);
852         blit.src.level    = 0;
853         blit.src.box      = trans->staging.box;
854         blit.mask = util_format_get_mask(blit.src.format);
855         blit.filter = PIPE_TEX_FILTER_NEAREST;
856 
857         panfrost_blit(pctx, &blit);
858 }
859 
860 static void
pan_blit_to_staging(struct pipe_context * pctx,struct panfrost_transfer * trans)861 pan_blit_to_staging(struct pipe_context *pctx, struct panfrost_transfer *trans)
862 {
863         struct pipe_resource *src = trans->base.resource;
864         struct pipe_blit_info blit = {0};
865 
866         blit.src.resource = src;
867         blit.src.format   = pan_blit_format(src->format);
868         blit.src.level    = trans->base.level;
869         blit.src.box      = trans->base.box;
870         blit.dst.resource = trans->staging.rsrc;
871         blit.dst.format   = pan_blit_format(trans->staging.rsrc->format);
872         blit.dst.level    = 0;
873         blit.dst.box      = trans->staging.box;
874         blit.mask = util_format_get_mask(blit.dst.format);
875         blit.filter = PIPE_TEX_FILTER_NEAREST;
876 
877         panfrost_blit(pctx, &blit);
878 }
879 
880 static void
panfrost_load_tiled_images(struct panfrost_transfer * transfer,struct panfrost_resource * rsrc)881 panfrost_load_tiled_images(struct panfrost_transfer *transfer,
882                            struct panfrost_resource *rsrc)
883 {
884         struct pipe_transfer *ptrans = &transfer->base;
885         unsigned level = ptrans->level;
886 
887         /* If the requested level of the image is uninitialized, it's not
888          * necessary to copy it. Leave the result unintiialized too.
889          */
890         if (!BITSET_TEST(rsrc->valid.data, level))
891                 return;
892 
893         struct panfrost_bo *bo = rsrc->image.data.bo;
894         unsigned stride = panfrost_get_layer_stride(&rsrc->image.layout, level);
895 
896         /* Otherwise, load each layer separately, required to load from 3D and
897          * array textures.
898          */
899         for (unsigned z = 0; z < ptrans->box.depth; ++z) {
900                 void *dst = transfer->map + (ptrans->layer_stride * z);
901                 uint8_t *map = bo->ptr.cpu +
902                                rsrc->image.layout.slices[level].offset +
903                                (z + ptrans->box.z) * stride;
904 
905                 panfrost_load_tiled_image(dst, map, ptrans->box.x,
906                                           ptrans->box.y, ptrans->box.width,
907                                           ptrans->box.height, ptrans->stride,
908                                           rsrc->image.layout.slices[level].row_stride,
909                                           rsrc->image.layout.format);
910         }
911 }
912 
913 static void
panfrost_store_tiled_images(struct panfrost_transfer * transfer,struct panfrost_resource * rsrc)914 panfrost_store_tiled_images(struct panfrost_transfer *transfer,
915                             struct panfrost_resource *rsrc)
916 {
917         struct panfrost_bo *bo = rsrc->image.data.bo;
918         struct pipe_transfer *ptrans = &transfer->base;
919         unsigned level = ptrans->level;
920         unsigned stride = panfrost_get_layer_stride(&rsrc->image.layout, level);
921 
922         /* Otherwise, store each layer separately, required to store to 3D and
923          * array textures.
924          */
925         for (unsigned z = 0; z < ptrans->box.depth; ++z) {
926                 void *src = transfer->map + (ptrans->layer_stride * z);
927                 uint8_t *map = bo->ptr.cpu +
928                                rsrc->image.layout.slices[level].offset +
929                                (z + ptrans->box.z) * stride;
930 
931                 panfrost_store_tiled_image(map, src,
932                                 ptrans->box.x, ptrans->box.y,
933                                 ptrans->box.width, ptrans->box.height,
934                                 rsrc->image.layout.slices[level].row_stride,
935                                 ptrans->stride, rsrc->image.layout.format);
936         }
937 }
938 
939 static bool
panfrost_box_covers_resource(const struct pipe_resource * resource,const struct pipe_box * box)940 panfrost_box_covers_resource(const struct pipe_resource *resource,
941                              const struct pipe_box *box)
942 {
943         return resource->last_level == 0 &&
944                util_texrange_covers_whole_level(resource, 0, box->x, box->y,
945                                                 box->z, box->width, box->height,
946                                                 box->depth);
947 }
948 
949 static void *
panfrost_ptr_map(struct pipe_context * pctx,struct pipe_resource * resource,unsigned level,unsigned usage,const struct pipe_box * box,struct pipe_transfer ** out_transfer)950 panfrost_ptr_map(struct pipe_context *pctx,
951                       struct pipe_resource *resource,
952                       unsigned level,
953                       unsigned usage,  /* a combination of PIPE_MAP_x */
954                       const struct pipe_box *box,
955                       struct pipe_transfer **out_transfer)
956 {
957         struct panfrost_context *ctx = pan_context(pctx);
958         struct panfrost_device *dev = pan_device(pctx->screen);
959         struct panfrost_resource *rsrc = pan_resource(resource);
960         enum pipe_format format = rsrc->image.layout.format;
961         int bytes_per_block = util_format_get_blocksize(format);
962         struct panfrost_bo *bo = rsrc->image.data.bo;
963 
964         /* Can't map tiled/compressed directly */
965         if ((usage & PIPE_MAP_DIRECTLY) && rsrc->image.layout.modifier != DRM_FORMAT_MOD_LINEAR)
966                 return NULL;
967 
968         struct panfrost_transfer *transfer = rzalloc(pctx, struct panfrost_transfer);
969         transfer->base.level = level;
970         transfer->base.usage = usage;
971         transfer->base.box = *box;
972 
973         pipe_resource_reference(&transfer->base.resource, resource);
974         *out_transfer = &transfer->base;
975 
976         if (usage & PIPE_MAP_WRITE)
977                 rsrc->constant_stencil = false;
978 
979         /* We don't have s/w routines for AFBC, so use a staging texture */
980         if (drm_is_afbc(rsrc->image.layout.modifier)) {
981                 struct panfrost_resource *staging = pan_alloc_staging(ctx, rsrc, level, box);
982                 assert(staging);
983 
984                 /* Staging resources have one LOD: level 0. Query the strides
985                  * on this LOD.
986                  */
987                 transfer->base.stride = staging->image.layout.slices[0].row_stride;
988                 transfer->base.layer_stride =
989                         panfrost_get_layer_stride(&staging->image.layout, 0);
990 
991                 transfer->staging.rsrc = &staging->base;
992 
993                 transfer->staging.box = *box;
994                 transfer->staging.box.x = 0;
995                 transfer->staging.box.y = 0;
996                 transfer->staging.box.z = 0;
997 
998                 assert(transfer->staging.rsrc != NULL);
999 
1000                 bool valid = BITSET_TEST(rsrc->valid.data, level);
1001 
1002                 if ((usage & PIPE_MAP_READ) && (valid || rsrc->track.nr_writers > 0)) {
1003                         pan_blit_to_staging(pctx, transfer);
1004                         panfrost_flush_writer(ctx, staging, "AFBC read staging blit");
1005                         panfrost_bo_wait(staging->image.data.bo, INT64_MAX, false);
1006                 }
1007 
1008                 panfrost_bo_mmap(staging->image.data.bo);
1009                 return staging->image.data.bo->ptr.cpu;
1010         }
1011 
1012         /* If we haven't already mmaped, now's the time */
1013         panfrost_bo_mmap(bo);
1014 
1015         if (dev->debug & (PAN_DBG_TRACE | PAN_DBG_SYNC))
1016                 pandecode_inject_mmap(bo->ptr.gpu, bo->ptr.cpu, bo->size, NULL);
1017 
1018         /* Upgrade DISCARD_RANGE to WHOLE_RESOURCE if the whole resource is
1019          * being mapped.
1020          */
1021         if ((usage & PIPE_MAP_DISCARD_RANGE) &&
1022             !(usage & PIPE_MAP_UNSYNCHRONIZED) &&
1023             !(resource->flags & PIPE_RESOURCE_FLAG_MAP_PERSISTENT) &&
1024             panfrost_box_covers_resource(resource, box) &&
1025             !(rsrc->image.data.bo->flags & PAN_BO_SHARED)) {
1026 
1027                 usage |= PIPE_MAP_DISCARD_WHOLE_RESOURCE;
1028         }
1029 
1030         bool create_new_bo = usage & PIPE_MAP_DISCARD_WHOLE_RESOURCE;
1031         bool copy_resource = false;
1032 
1033         if (!create_new_bo &&
1034             !(usage & PIPE_MAP_UNSYNCHRONIZED) &&
1035             (usage & PIPE_MAP_WRITE) &&
1036             !(resource->target == PIPE_BUFFER
1037               && !util_ranges_intersect(&rsrc->valid_buffer_range, box->x, box->x + box->width)) &&
1038             rsrc->track.nr_users > 0) {
1039 
1040                 /* When a resource to be modified is already being used by a
1041                  * pending batch, it is often faster to copy the whole BO than
1042                  * to flush and split the frame in two.
1043                  */
1044 
1045                 panfrost_flush_writer(ctx, rsrc, "Shadow resource creation");
1046                 panfrost_bo_wait(bo, INT64_MAX, false);
1047 
1048                 create_new_bo = true;
1049                 copy_resource = !(usage & PIPE_MAP_DISCARD_WHOLE_RESOURCE);
1050         }
1051 
1052         /* Shadowing with separate stencil may require additional accounting.
1053          * Bail in these exotic cases.
1054          */
1055         if (rsrc->separate_stencil) {
1056                 create_new_bo = false;
1057                 copy_resource = false;
1058         }
1059 
1060         if (create_new_bo) {
1061                 /* Make sure we re-emit any descriptors using this resource */
1062                 panfrost_dirty_state_all(ctx);
1063 
1064                 /* If the BO is used by one of the pending batches or if it's
1065                  * not ready yet (still accessed by one of the already flushed
1066                  * batches), we try to allocate a new one to avoid waiting.
1067                  */
1068                 if (rsrc->track.nr_users > 0 ||
1069                     !panfrost_bo_wait(bo, 0, true)) {
1070                         /* We want the BO to be MMAPed. */
1071                         uint32_t flags = bo->flags & ~PAN_BO_DELAY_MMAP;
1072                         struct panfrost_bo *newbo = NULL;
1073 
1074                         /* When the BO has been imported/exported, we can't
1075                          * replace it by another one, otherwise the
1076                          * importer/exporter wouldn't see the change we're
1077                          * doing to it.
1078                          */
1079                         if (!(bo->flags & PAN_BO_SHARED))
1080                                 newbo = panfrost_bo_create(dev, bo->size,
1081                                                            flags, bo->label);
1082 
1083                         if (newbo) {
1084                                 if (copy_resource)
1085                                         memcpy(newbo->ptr.cpu, rsrc->image.data.bo->ptr.cpu, bo->size);
1086 
1087                                 panfrost_resource_swap_bo(ctx, rsrc, newbo);
1088 
1089 	                        if (!copy_resource &&
1090                                     drm_is_afbc(rsrc->image.layout.modifier))
1091                                         panfrost_resource_init_afbc_headers(rsrc);
1092 
1093                                 bo = newbo;
1094                         } else {
1095                                 /* Allocation failed or was impossible, let's
1096                                  * fall back on a flush+wait.
1097                                  */
1098                                 panfrost_flush_batches_accessing_rsrc(ctx, rsrc,
1099                                                 "Resource access with high memory pressure");
1100                                 panfrost_bo_wait(bo, INT64_MAX, true);
1101                         }
1102                 }
1103         } else if ((usage & PIPE_MAP_WRITE)
1104                    && resource->target == PIPE_BUFFER
1105                    && !util_ranges_intersect(&rsrc->valid_buffer_range, box->x, box->x + box->width)) {
1106                 /* No flush for writes to uninitialized */
1107         } else if (!(usage & PIPE_MAP_UNSYNCHRONIZED)) {
1108                 if (usage & PIPE_MAP_WRITE) {
1109                         panfrost_flush_batches_accessing_rsrc(ctx, rsrc, "Synchronized write");
1110                         panfrost_bo_wait(bo, INT64_MAX, true);
1111                 } else if (usage & PIPE_MAP_READ) {
1112                         panfrost_flush_writer(ctx, rsrc, "Synchronized read");
1113                         panfrost_bo_wait(bo, INT64_MAX, false);
1114                 }
1115         }
1116 
1117         /* For access to compressed textures, we want the (x, y, w, h)
1118          * region-of-interest in blocks, not pixels. Then we compute the stride
1119          * between rows of blocks as the width in blocks times the width per
1120          * block, etc.
1121          */
1122         struct pipe_box box_blocks;
1123         u_box_pixels_to_blocks(&box_blocks, box, format);
1124 
1125         if (rsrc->image.layout.modifier == DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED) {
1126                 transfer->base.stride = box_blocks.width * bytes_per_block;
1127                 transfer->base.layer_stride = transfer->base.stride * box_blocks.height;
1128                 transfer->map = ralloc_size(transfer, transfer->base.layer_stride * box->depth);
1129 
1130                 if (usage & PIPE_MAP_READ)
1131                         panfrost_load_tiled_images(transfer, rsrc);
1132 
1133                 return transfer->map;
1134         } else {
1135                 assert (rsrc->image.layout.modifier == DRM_FORMAT_MOD_LINEAR);
1136 
1137                 /* Direct, persistent writes create holes in time for
1138                  * caching... I don't know if this is actually possible but we
1139                  * should still get it right */
1140 
1141                 unsigned dpw = PIPE_MAP_DIRECTLY | PIPE_MAP_WRITE | PIPE_MAP_PERSISTENT;
1142 
1143                 if ((usage & dpw) == dpw && rsrc->index_cache)
1144                         return NULL;
1145 
1146                 transfer->base.stride = rsrc->image.layout.slices[level].row_stride;
1147                 transfer->base.layer_stride =
1148                         panfrost_get_layer_stride(&rsrc->image.layout, level);
1149 
1150                 /* By mapping direct-write, we're implicitly already
1151                  * initialized (maybe), so be conservative */
1152 
1153                 if (usage & PIPE_MAP_WRITE) {
1154                         BITSET_SET(rsrc->valid.data, level);
1155                         panfrost_minmax_cache_invalidate(rsrc->index_cache, &transfer->base);
1156                 }
1157 
1158                 return bo->ptr.cpu
1159                        + rsrc->image.layout.slices[level].offset
1160                        + box->z * transfer->base.layer_stride
1161                        + box_blocks.y * rsrc->image.layout.slices[level].row_stride
1162                        + box_blocks.x * bytes_per_block;
1163         }
1164 }
1165 
1166 void
pan_resource_modifier_convert(struct panfrost_context * ctx,struct panfrost_resource * rsrc,uint64_t modifier,const char * reason)1167 pan_resource_modifier_convert(struct panfrost_context *ctx,
1168                               struct panfrost_resource *rsrc,
1169                               uint64_t modifier, const char *reason)
1170 {
1171         assert(!rsrc->modifier_constant);
1172 
1173         perf_debug_ctx(ctx, "Disabling AFBC with a blit. Reason: %s", reason);
1174 
1175         struct pipe_resource *tmp_prsrc =
1176                 panfrost_resource_create_with_modifier(
1177                         ctx->base.screen, &rsrc->base, modifier);
1178         struct panfrost_resource *tmp_rsrc = pan_resource(tmp_prsrc);
1179         enum pipe_format blit_fmt = pan_blit_format(tmp_rsrc->base.format);
1180 
1181         unsigned depth = rsrc->base.target == PIPE_TEXTURE_3D ?
1182                 rsrc->base.depth0 : rsrc->base.array_size;
1183 
1184         struct pipe_box box =
1185                 { 0, 0, 0, rsrc->base.width0, rsrc->base.height0, depth };
1186 
1187         struct pipe_blit_info blit = {
1188                 .dst.resource = &tmp_rsrc->base,
1189                 .dst.format   = blit_fmt,
1190                 .dst.box      = box,
1191                 .src.resource = &rsrc->base,
1192                 .src.format   = pan_blit_format(rsrc->base.format),
1193                 .src.box      = box,
1194                 .mask         = util_format_get_mask(blit_fmt),
1195                 .filter       = PIPE_TEX_FILTER_NEAREST
1196         };
1197 
1198         for (int i = 0; i <= rsrc->base.last_level; i++) {
1199                 if (BITSET_TEST(rsrc->valid.data, i)) {
1200                         blit.dst.level = blit.src.level  = i;
1201                         panfrost_blit(&ctx->base, &blit);
1202                 }
1203         }
1204 
1205         panfrost_bo_unreference(rsrc->image.data.bo);
1206         if (rsrc->image.crc.bo)
1207                 panfrost_bo_unreference(rsrc->image.crc.bo);
1208 
1209         rsrc->image.data.bo = tmp_rsrc->image.data.bo;
1210         panfrost_bo_reference(rsrc->image.data.bo);
1211 
1212         panfrost_resource_setup(pan_device(ctx->base.screen), rsrc, modifier,
1213                                 blit.dst.format);
1214         pipe_resource_reference(&tmp_prsrc, NULL);
1215 }
1216 
1217 /* Validate that an AFBC resource may be used as a particular format. If it may
1218  * not, decompress it on the fly. Failure to do so can produce wrong results or
1219  * invalid data faults when sampling or rendering to AFBC */
1220 
1221 void
pan_legalize_afbc_format(struct panfrost_context * ctx,struct panfrost_resource * rsrc,enum pipe_format format)1222 pan_legalize_afbc_format(struct panfrost_context *ctx,
1223                          struct panfrost_resource *rsrc,
1224                          enum pipe_format format)
1225 {
1226         struct panfrost_device *dev = pan_device(ctx->base.screen);
1227 
1228         if (!drm_is_afbc(rsrc->image.layout.modifier))
1229                 return;
1230 
1231         if (panfrost_afbc_format(dev->arch, pan_blit_format(rsrc->base.format)) ==
1232             panfrost_afbc_format(dev->arch, pan_blit_format(format)))
1233                 return;
1234 
1235         pan_resource_modifier_convert(ctx, rsrc,
1236                         DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED,
1237                         "Reinterpreting AFBC surface as incompatible format");
1238 }
1239 
1240 static bool
panfrost_should_linear_convert(struct panfrost_device * dev,struct panfrost_resource * prsrc,struct pipe_transfer * transfer)1241 panfrost_should_linear_convert(struct panfrost_device *dev,
1242                                struct panfrost_resource *prsrc,
1243                                struct pipe_transfer *transfer)
1244 {
1245         if (prsrc->modifier_constant)
1246                 return false;
1247 
1248         /* Overwriting the entire resource indicates streaming, for which
1249          * linear layout is most efficient due to the lack of expensive
1250          * conversion.
1251          *
1252          * For now we just switch to linear after a number of complete
1253          * overwrites to keep things simple, but we could do better.
1254          *
1255          * This mechanism is only implemented for 2D resources. This suffices
1256          * for video players, its intended use case.
1257          */
1258 
1259         bool entire_overwrite =
1260                 panfrost_is_2d(prsrc) &&
1261                 prsrc->base.last_level == 0 &&
1262                 transfer->box.width == prsrc->base.width0 &&
1263                 transfer->box.height == prsrc->base.height0 &&
1264                 transfer->box.x == 0 &&
1265                 transfer->box.y == 0;
1266 
1267         if (entire_overwrite)
1268                 ++prsrc->modifier_updates;
1269 
1270         if (prsrc->modifier_updates >= LAYOUT_CONVERT_THRESHOLD) {
1271                 perf_debug(dev, "Transitioning to linear due to streaming usage");
1272                 return true;
1273         } else {
1274                 return false;
1275         }
1276 }
1277 
1278 static void
panfrost_ptr_unmap(struct pipe_context * pctx,struct pipe_transfer * transfer)1279 panfrost_ptr_unmap(struct pipe_context *pctx,
1280                         struct pipe_transfer *transfer)
1281 {
1282         /* Gallium expects writeback here, so we tile */
1283 
1284         struct panfrost_transfer *trans = pan_transfer(transfer);
1285         struct panfrost_resource *prsrc = (struct panfrost_resource *) transfer->resource;
1286         struct panfrost_device *dev = pan_device(pctx->screen);
1287 
1288         if (transfer->usage & PIPE_MAP_WRITE)
1289                 prsrc->valid.crc = false;
1290 
1291         /* AFBC will use a staging resource. `initialized` will be set when the
1292          * fragment job is created; this is deferred to prevent useless surface
1293          * reloads that can cascade into DATA_INVALID_FAULTs due to reading
1294          * malformed AFBC data if uninitialized */
1295 
1296         if (trans->staging.rsrc) {
1297                 if (transfer->usage & PIPE_MAP_WRITE) {
1298                         if (panfrost_should_linear_convert(dev, prsrc, transfer)) {
1299 
1300                                 panfrost_bo_unreference(prsrc->image.data.bo);
1301                                 if (prsrc->image.crc.bo)
1302                                         panfrost_bo_unreference(prsrc->image.crc.bo);
1303 
1304                                 panfrost_resource_setup(dev, prsrc, DRM_FORMAT_MOD_LINEAR,
1305                                                         prsrc->image.layout.format);
1306 
1307                                 prsrc->image.data.bo = pan_resource(trans->staging.rsrc)->image.data.bo;
1308                                 panfrost_bo_reference(prsrc->image.data.bo);
1309                         } else {
1310                                 pan_blit_from_staging(pctx, trans);
1311                                 panfrost_flush_batches_accessing_rsrc(pan_context(pctx),
1312                                                 pan_resource(trans->staging.rsrc),
1313                                                 "AFBC write staging blit");
1314                         }
1315                 }
1316 
1317                 pipe_resource_reference(&trans->staging.rsrc, NULL);
1318         }
1319 
1320         /* Tiling will occur in software from a staging cpu buffer */
1321         if (trans->map) {
1322                 struct panfrost_bo *bo = prsrc->image.data.bo;
1323 
1324                 if (transfer->usage & PIPE_MAP_WRITE) {
1325                         BITSET_SET(prsrc->valid.data, transfer->level);
1326 
1327                         if (prsrc->image.layout.modifier == DRM_FORMAT_MOD_ARM_16X16_BLOCK_U_INTERLEAVED) {
1328                                 if (panfrost_should_linear_convert(dev, prsrc, transfer)) {
1329                                         panfrost_resource_setup(dev, prsrc, DRM_FORMAT_MOD_LINEAR,
1330                                                                 prsrc->image.layout.format);
1331                                         if (prsrc->image.layout.data_size > bo->size) {
1332                                                 const char *label = bo->label;
1333                                                 panfrost_bo_unreference(bo);
1334                                                 bo = prsrc->image.data.bo =
1335                                                         panfrost_bo_create(dev, prsrc->image.layout.data_size, 0, label);
1336                                                 assert(bo);
1337                                         }
1338 
1339                                         util_copy_rect(
1340                                                 bo->ptr.cpu + prsrc->image.layout.slices[0].offset,
1341                                                 prsrc->base.format,
1342                                                 prsrc->image.layout.slices[0].row_stride,
1343                                                 0, 0,
1344                                                 transfer->box.width,
1345                                                 transfer->box.height,
1346                                                 trans->map,
1347                                                 transfer->stride,
1348                                                 0, 0);
1349                                 } else {
1350                                         panfrost_store_tiled_images(trans, prsrc);
1351                                 }
1352                         }
1353                 }
1354         }
1355 
1356 
1357         util_range_add(&prsrc->base, &prsrc->valid_buffer_range,
1358                        transfer->box.x,
1359                        transfer->box.x + transfer->box.width);
1360 
1361         panfrost_minmax_cache_invalidate(prsrc->index_cache, transfer);
1362 
1363         /* Derefence the resource */
1364         pipe_resource_reference(&transfer->resource, NULL);
1365 
1366         /* Transfer itself is RALLOCed at the moment */
1367         ralloc_free(transfer);
1368 }
1369 
1370 static void
panfrost_ptr_flush_region(struct pipe_context * pctx,struct pipe_transfer * transfer,const struct pipe_box * box)1371 panfrost_ptr_flush_region(struct pipe_context *pctx,
1372                                struct pipe_transfer *transfer,
1373                                const struct pipe_box *box)
1374 {
1375         struct panfrost_resource *rsc = pan_resource(transfer->resource);
1376 
1377         if (transfer->resource->target == PIPE_BUFFER) {
1378                 util_range_add(&rsc->base, &rsc->valid_buffer_range,
1379                                transfer->box.x + box->x,
1380                                transfer->box.x + box->x + box->width);
1381         } else {
1382                 BITSET_SET(rsc->valid.data, transfer->level);
1383         }
1384 }
1385 
1386 static void
panfrost_invalidate_resource(struct pipe_context * pctx,struct pipe_resource * prsrc)1387 panfrost_invalidate_resource(struct pipe_context *pctx, struct pipe_resource *prsrc)
1388 {
1389         struct panfrost_context *ctx = pan_context(pctx);
1390         struct panfrost_batch *batch = panfrost_get_batch_for_fbo(ctx);
1391         struct panfrost_resource *rsrc = pan_resource(prsrc);
1392 
1393         rsrc->constant_stencil = true;
1394 
1395         /* Handle the glInvalidateFramebuffer case */
1396         if (batch->key.zsbuf && batch->key.zsbuf->texture == prsrc)
1397                 batch->resolve &= ~PIPE_CLEAR_DEPTHSTENCIL;
1398 
1399         for (unsigned i = 0; i < batch->key.nr_cbufs; ++i) {
1400                 struct pipe_surface *surf = batch->key.cbufs[i];
1401 
1402                 if (surf && surf->texture == prsrc)
1403                         batch->resolve &= ~(PIPE_CLEAR_COLOR0 << i);
1404         }
1405 }
1406 
1407 static enum pipe_format
panfrost_resource_get_internal_format(struct pipe_resource * rsrc)1408 panfrost_resource_get_internal_format(struct pipe_resource *rsrc)
1409 {
1410         struct panfrost_resource *prsrc = (struct panfrost_resource *) rsrc;
1411         return prsrc->image.layout.format;
1412 }
1413 
1414 static bool
panfrost_generate_mipmap(struct pipe_context * pctx,struct pipe_resource * prsrc,enum pipe_format format,unsigned base_level,unsigned last_level,unsigned first_layer,unsigned last_layer)1415 panfrost_generate_mipmap(
1416         struct pipe_context *pctx,
1417         struct pipe_resource *prsrc,
1418         enum pipe_format format,
1419         unsigned base_level,
1420         unsigned last_level,
1421         unsigned first_layer,
1422         unsigned last_layer)
1423 {
1424         struct panfrost_resource *rsrc = pan_resource(prsrc);
1425 
1426         /* Generating a mipmap invalidates the written levels, so make that
1427          * explicit so we don't try to wallpaper them back and end up with
1428          * u_blitter recursion */
1429 
1430         assert(rsrc->image.data.bo);
1431         for (unsigned l = base_level + 1; l <= last_level; ++l)
1432                 BITSET_CLEAR(rsrc->valid.data, l);
1433 
1434         /* Beyond that, we just delegate the hard stuff. */
1435 
1436         bool blit_res = util_gen_mipmap(
1437                                 pctx, prsrc, format,
1438                                 base_level, last_level,
1439                                 first_layer, last_layer,
1440                                 PIPE_TEX_FILTER_LINEAR);
1441 
1442         return blit_res;
1443 }
1444 
1445 static void
panfrost_resource_set_stencil(struct pipe_resource * prsrc,struct pipe_resource * stencil)1446 panfrost_resource_set_stencil(struct pipe_resource *prsrc,
1447                               struct pipe_resource *stencil)
1448 {
1449         pan_resource(prsrc)->separate_stencil = pan_resource(stencil);
1450 }
1451 
1452 static struct pipe_resource *
panfrost_resource_get_stencil(struct pipe_resource * prsrc)1453 panfrost_resource_get_stencil(struct pipe_resource *prsrc)
1454 {
1455         if (!pan_resource(prsrc)->separate_stencil)
1456                 return NULL;
1457 
1458         return &pan_resource(prsrc)->separate_stencil->base;
1459 }
1460 
1461 static const struct u_transfer_vtbl transfer_vtbl = {
1462         .resource_create          = panfrost_resource_create,
1463         .resource_destroy         = panfrost_resource_destroy,
1464         .transfer_map             = panfrost_ptr_map,
1465         .transfer_unmap           = panfrost_ptr_unmap,
1466         .transfer_flush_region    = panfrost_ptr_flush_region,
1467         .get_internal_format      = panfrost_resource_get_internal_format,
1468         .set_stencil              = panfrost_resource_set_stencil,
1469         .get_stencil              = panfrost_resource_get_stencil,
1470 };
1471 
1472 void
panfrost_resource_screen_init(struct pipe_screen * pscreen)1473 panfrost_resource_screen_init(struct pipe_screen *pscreen)
1474 {
1475         struct panfrost_device *dev = pan_device(pscreen);
1476 
1477         bool fake_rgtc = !panfrost_supports_compressed_format(dev, MALI_BC4_UNORM);
1478 
1479         pscreen->resource_create_with_modifiers =
1480                 panfrost_resource_create_with_modifiers;
1481         pscreen->resource_create = u_transfer_helper_resource_create;
1482         pscreen->resource_destroy = u_transfer_helper_resource_destroy;
1483         pscreen->resource_from_handle = panfrost_resource_from_handle;
1484         pscreen->resource_get_handle = panfrost_resource_get_handle;
1485         pscreen->resource_get_param = panfrost_resource_get_param;
1486         pscreen->transfer_helper = u_transfer_helper_create(&transfer_vtbl,
1487                                         true, false,
1488                                         fake_rgtc, true, false);
1489 }
1490 void
panfrost_resource_screen_destroy(struct pipe_screen * pscreen)1491 panfrost_resource_screen_destroy(struct pipe_screen *pscreen)
1492 {
1493         u_transfer_helper_destroy(pscreen->transfer_helper);
1494 }
1495 
1496 void
panfrost_resource_context_init(struct pipe_context * pctx)1497 panfrost_resource_context_init(struct pipe_context *pctx)
1498 {
1499         pctx->buffer_map = u_transfer_helper_transfer_map;
1500         pctx->buffer_unmap = u_transfer_helper_transfer_unmap;
1501         pctx->texture_map = u_transfer_helper_transfer_map;
1502         pctx->texture_unmap = u_transfer_helper_transfer_unmap;
1503         pctx->create_surface = panfrost_create_surface;
1504         pctx->surface_destroy = panfrost_surface_destroy;
1505         pctx->resource_copy_region = util_resource_copy_region;
1506         pctx->blit = panfrost_blit;
1507         pctx->generate_mipmap = panfrost_generate_mipmap;
1508         pctx->flush_resource = panfrost_flush_resource;
1509         pctx->invalidate_resource = panfrost_invalidate_resource;
1510         pctx->transfer_flush_region = u_transfer_helper_transfer_flush_region;
1511         pctx->buffer_subdata = u_default_buffer_subdata;
1512         pctx->texture_subdata = u_default_texture_subdata;
1513         pctx->clear_buffer = u_default_clear_buffer;
1514 }
1515