pvr_hwrt.c

  1// SPDX-License-Identifier: GPL-2.0-only OR MIT
  2/* Copyright (c) 2023 Imagination Technologies Ltd. */
  3
  4#include "pvr_free_list.h"
  5#include "pvr_hwrt.h"
  6#include "pvr_gem.h"
  7#include "pvr_rogue_cr_defs_client.h"
  8#include "pvr_rogue_fwif.h"
  9
 10#include <drm/drm_gem.h>
 11#include <linux/bitops.h>
 12#include <linux/math.h>
 13#include <linux/slab.h>
 14#include <linux/xarray.h>
 15#include <uapi/drm/pvr_drm.h>
 16
 17static_assert(ROGUE_FWIF_NUM_RTDATAS == 2);
 18static_assert(ROGUE_FWIF_NUM_GEOMDATAS == 1);
 19static_assert(ROGUE_FWIF_NUM_RTDATA_FREELISTS == 2);
 20
 21/*
 22 * struct pvr_rt_mtile_info - Render target macrotile information
 23 */
 24struct pvr_rt_mtile_info {
 25	u32 mtile_x[3];
 26	u32 mtile_y[3];
 27	u32 tile_max_x;
 28	u32 tile_max_y;
 29	u32 tile_size_x;
 30	u32 tile_size_y;
 31	u32 num_tiles_x;
 32	u32 num_tiles_y;
 33};
 34
 35/* Size of Shadow Render Target Cache entry */
 36#define SRTC_ENTRY_SIZE sizeof(u32)
 37/* Size of Renders Accumulation Array entry */
 38#define RAA_ENTRY_SIZE sizeof(u32)
 39
 40static int
 41hwrt_init_kernel_structure(struct pvr_file *pvr_file,
 42			   struct drm_pvr_ioctl_create_hwrt_dataset_args *args,
 43			   struct pvr_hwrt_dataset *hwrt)
 44{
 45	struct pvr_device *pvr_dev = pvr_file->pvr_dev;
 46	int err;
 47
 48	hwrt->pvr_dev = pvr_dev;
 49	hwrt->max_rts = args->layers;
 50
 51	/* Get pointers to the free lists */
 52	for (int i = 0; i < ARRAY_SIZE(hwrt->free_lists); i++) {
 53		hwrt->free_lists[i] = pvr_free_list_lookup(pvr_file,  args->free_list_handles[i]);
 54		if (!hwrt->free_lists[i]) {
 55			err = -EINVAL;
 56			goto err_put_free_lists;
 57		}
 58	}
 59
 60	if (hwrt->free_lists[ROGUE_FW_LOCAL_FREELIST]->current_pages <
 61	    pvr_get_free_list_min_pages(pvr_dev)) {
 62		err = -EINVAL;
 63		goto err_put_free_lists;
 64	}
 65
 66	return 0;
 67
 68err_put_free_lists:
 69	for (int i = 0; i < ARRAY_SIZE(hwrt->free_lists); i++) {
 70		pvr_free_list_put(hwrt->free_lists[i]);
 71		hwrt->free_lists[i] = NULL;
 72	}
 73
 74	return err;
 75}
 76
 77static void
 78hwrt_fini_kernel_structure(struct pvr_hwrt_dataset *hwrt)
 79{
 80	for (int i = 0; i < ARRAY_SIZE(hwrt->free_lists); i++) {
 81		pvr_free_list_put(hwrt->free_lists[i]);
 82		hwrt->free_lists[i] = NULL;
 83	}
 84}
 85
 86static void
 87hwrt_fini_common_fw_structure(struct pvr_hwrt_dataset *hwrt)
 88{
 89	pvr_fw_object_destroy(hwrt->common_fw_obj);
 90}
 91
 92static int
 93get_cr_isp_mtile_size_val(struct pvr_device *pvr_dev, u32 samples,
 94			  struct pvr_rt_mtile_info *info, u32 *value_out)
 95{
 96	u32 x = info->mtile_x[0];
 97	u32 y = info->mtile_y[0];
 98	u32 samples_per_pixel;
 99	int err;
100
101	err = PVR_FEATURE_VALUE(pvr_dev, isp_samples_per_pixel, &samples_per_pixel);
102	if (err)
103		return err;
104
105	if (samples_per_pixel == 1) {
106		if (samples >= 4)
107			x <<= 1;
108		if (samples >= 2)
109			y <<= 1;
110	} else if (samples_per_pixel == 2) {
111		if (samples >= 8)
112			x <<= 1;
113		if (samples >= 4)
114			y <<= 1;
115	} else if (samples_per_pixel == 4) {
116		if (samples >= 8)
117			y <<= 1;
118	} else {
119		WARN(true, "Unsupported ISP samples per pixel value");
120		return -EINVAL;
121	}
122
123	*value_out = ((x << ROGUE_CR_ISP_MTILE_SIZE_X_SHIFT) & ~ROGUE_CR_ISP_MTILE_SIZE_X_CLRMSK) |
124		     ((y << ROGUE_CR_ISP_MTILE_SIZE_Y_SHIFT) & ~ROGUE_CR_ISP_MTILE_SIZE_Y_CLRMSK);
125
126	return 0;
127}
128
129static int
130get_cr_multisamplectl_val(u32 samples, bool y_flip, u64 *value_out)
131{
132	static const struct {
133		u8 x[8];
134		u8 y[8];
135	} sample_positions[4] = {
136		/* 1 sample */
137		{
138			.x = { 8 },
139			.y = { 8 },
140		},
141		/* 2 samples */
142		{
143			.x = { 12, 4 },
144			.y = { 12, 4 },
145		},
146		/* 4 samples */
147		{
148			.x = { 6, 14, 2, 10 },
149			.y = { 2, 6, 10, 14 },
150		},
151		/* 8 samples */
152		{
153			.x = { 9, 7, 13, 5, 3, 1, 11, 15 },
154			.y = { 5, 11, 9, 3, 13, 7, 15, 1 },
155		},
156	};
157	const int idx = fls(samples) - 1;
158	u64 value = 0;
159
160	if (idx < 0 || idx > 3)
161		return -EINVAL;
162
163	for (u32 i = 0; i < 8; i++) {
164		value |= ((u64)sample_positions[idx].x[i]) << (i * 8);
165		if (y_flip)
166			value |= (((u64)(16 - sample_positions[idx].y[i]) & 0xf)) << (i * 8 + 4);
167		else
168			value |= ((u64)sample_positions[idx].y[i]) << (i * 8 + 4);
169	}
170
171	*value_out = value;
172
173	return 0;
174}
175
176static int
177get_cr_te_aa_val(struct pvr_device *pvr_dev, u32 samples, u32 *value_out)
178{
179	u32 samples_per_pixel;
180	u32 value = 0;
181	int err = 0;
182
183	err = PVR_FEATURE_VALUE(pvr_dev, isp_samples_per_pixel, &samples_per_pixel);
184	if (err)
185		return err;
186
187	switch (samples_per_pixel) {
188	case 1:
189		if (samples >= 2)
190			value |= ROGUE_CR_TE_AA_Y_EN;
191		if (samples >= 4)
192			value |= ROGUE_CR_TE_AA_X_EN;
193		break;
194	case 2:
195		if (samples >= 2)
196			value |= ROGUE_CR_TE_AA_X2_EN;
197		if (samples >= 4)
198			value |= ROGUE_CR_TE_AA_Y_EN;
199		if (samples >= 8)
200			value |= ROGUE_CR_TE_AA_X_EN;
201		break;
202	case 4:
203		if (samples >= 2)
204			value |= ROGUE_CR_TE_AA_X2_EN;
205		if (samples >= 4)
206			value |= ROGUE_CR_TE_AA_Y2_EN;
207		if (samples >= 8)
208			value |= ROGUE_CR_TE_AA_Y_EN;
209		break;
210	default:
211		WARN(true, "Unsupported ISP samples per pixel value");
212		return -EINVAL;
213	}
214
215	*value_out = value;
216
217	return 0;
218}
219
220static void
221hwrtdata_common_init(void *cpu_ptr, void *priv)
222{
223	struct pvr_hwrt_dataset *hwrt = priv;
224
225	memcpy(cpu_ptr, &hwrt->common, sizeof(hwrt->common));
226}
227
228static int
229hwrt_init_common_fw_structure(struct pvr_file *pvr_file,
230			      struct drm_pvr_ioctl_create_hwrt_dataset_args *args,
231			      struct pvr_hwrt_dataset *hwrt)
232{
233	struct drm_pvr_create_hwrt_geom_data_args *geom_data_args = &args->geom_data_args;
234	struct pvr_device *pvr_dev = pvr_file->pvr_dev;
235	struct pvr_rt_mtile_info info;
236	int err;
237
238	err = PVR_FEATURE_VALUE(pvr_dev, tile_size_x, &info.tile_size_x);
239	if (WARN_ON(err))
240		return err;
241
242	err = PVR_FEATURE_VALUE(pvr_dev, tile_size_y, &info.tile_size_y);
243	if (WARN_ON(err))
244		return err;
245
246	info.num_tiles_x = DIV_ROUND_UP(args->width, info.tile_size_x);
247	info.num_tiles_y = DIV_ROUND_UP(args->height, info.tile_size_y);
248
249	if (PVR_HAS_FEATURE(pvr_dev, simple_parameter_format_version)) {
250		u32 parameter_format;
251
252		err = PVR_FEATURE_VALUE(pvr_dev, simple_parameter_format_version,
253					&parameter_format);
254		if (WARN_ON(err))
255			return err;
256
257		WARN_ON(parameter_format != 2);
258
259		/*
260		 * Set up 16 macrotiles with a multiple of 2x2 tiles per macrotile, which is
261		 * aligned to a tile group.
262		 */
263		info.mtile_x[0] = DIV_ROUND_UP(info.num_tiles_x, 8) * 2;
264		info.mtile_y[0] = DIV_ROUND_UP(info.num_tiles_y, 8) * 2;
265		info.mtile_x[1] = 0;
266		info.mtile_y[1] = 0;
267		info.mtile_x[2] = 0;
268		info.mtile_y[2] = 0;
269		info.tile_max_x = round_up(info.num_tiles_x, 2) - 1;
270		info.tile_max_y = round_up(info.num_tiles_y, 2) - 1;
271	} else {
272		/* Set up 16 macrotiles with a multiple of 4x4 tiles per macrotile. */
273		info.mtile_x[0] = round_up(DIV_ROUND_UP(info.num_tiles_x, 4), 4);
274		info.mtile_y[0] = round_up(DIV_ROUND_UP(info.num_tiles_y, 4), 4);
275		info.mtile_x[1] = info.mtile_x[0] * 2;
276		info.mtile_y[1] = info.mtile_y[0] * 2;
277		info.mtile_x[2] = info.mtile_x[0] * 3;
278		info.mtile_y[2] = info.mtile_y[0] * 3;
279		info.tile_max_x = info.num_tiles_x - 1;
280		info.tile_max_y = info.num_tiles_y - 1;
281	}
282
283	hwrt->common.geom_caches_need_zeroing = false;
284
285	hwrt->common.isp_merge_lower_x = args->isp_merge_lower_x;
286	hwrt->common.isp_merge_lower_y = args->isp_merge_lower_y;
287	hwrt->common.isp_merge_upper_x = args->isp_merge_upper_x;
288	hwrt->common.isp_merge_upper_y = args->isp_merge_upper_y;
289	hwrt->common.isp_merge_scale_x = args->isp_merge_scale_x;
290	hwrt->common.isp_merge_scale_y = args->isp_merge_scale_y;
291
292	err = get_cr_multisamplectl_val(args->samples, false,
293					&hwrt->common.multi_sample_ctl);
294	if (err)
295		return err;
296
297	err = get_cr_multisamplectl_val(args->samples, true,
298					&hwrt->common.flipped_multi_sample_ctl);
299	if (err)
300		return err;
301
302	hwrt->common.mtile_stride = info.mtile_x[0] * info.mtile_y[0];
303
304	err = get_cr_te_aa_val(pvr_dev, args->samples, &hwrt->common.teaa);
305	if (err)
306		return err;
307
308	hwrt->common.screen_pixel_max =
309		(((args->width - 1) << ROGUE_CR_PPP_SCREEN_PIXXMAX_SHIFT) &
310		 ~ROGUE_CR_PPP_SCREEN_PIXXMAX_CLRMSK) |
311		(((args->height - 1) << ROGUE_CR_PPP_SCREEN_PIXYMAX_SHIFT) &
312		 ~ROGUE_CR_PPP_SCREEN_PIXYMAX_CLRMSK);
313
314	hwrt->common.te_screen =
315		((info.tile_max_x << ROGUE_CR_TE_SCREEN_XMAX_SHIFT) &
316		 ~ROGUE_CR_TE_SCREEN_XMAX_CLRMSK) |
317		((info.tile_max_y << ROGUE_CR_TE_SCREEN_YMAX_SHIFT) &
318		 ~ROGUE_CR_TE_SCREEN_YMAX_CLRMSK);
319	hwrt->common.te_mtile1 =
320		((info.mtile_x[0] << ROGUE_CR_TE_MTILE1_X1_SHIFT) & ~ROGUE_CR_TE_MTILE1_X1_CLRMSK) |
321		((info.mtile_x[1] << ROGUE_CR_TE_MTILE1_X2_SHIFT) & ~ROGUE_CR_TE_MTILE1_X2_CLRMSK) |
322		((info.mtile_x[2] << ROGUE_CR_TE_MTILE1_X3_SHIFT) & ~ROGUE_CR_TE_MTILE1_X3_CLRMSK);
323	hwrt->common.te_mtile2 =
324		((info.mtile_y[0] << ROGUE_CR_TE_MTILE2_Y1_SHIFT) & ~ROGUE_CR_TE_MTILE2_Y1_CLRMSK) |
325		((info.mtile_y[1] << ROGUE_CR_TE_MTILE2_Y2_SHIFT) & ~ROGUE_CR_TE_MTILE2_Y2_CLRMSK) |
326		((info.mtile_y[2] << ROGUE_CR_TE_MTILE2_Y3_SHIFT) & ~ROGUE_CR_TE_MTILE2_Y3_CLRMSK);
327
328	err = get_cr_isp_mtile_size_val(pvr_dev, args->samples, &info,
329					&hwrt->common.isp_mtile_size);
330	if (err)
331		return err;
332
333	hwrt->common.tpc_stride = geom_data_args->tpc_stride;
334	hwrt->common.tpc_size = geom_data_args->tpc_size;
335
336	hwrt->common.rgn_header_size = args->region_header_size;
337
338	err = pvr_fw_object_create(pvr_dev, sizeof(struct rogue_fwif_hwrtdata_common),
339				   PVR_BO_FW_FLAGS_DEVICE_UNCACHED, hwrtdata_common_init, hwrt,
340				   &hwrt->common_fw_obj);
341
342	return err;
343}
344
345static void
346hwrt_fw_data_init(void *cpu_ptr, void *priv)
347{
348	struct pvr_hwrt_data *hwrt_data = priv;
349
350	memcpy(cpu_ptr, &hwrt_data->data, sizeof(hwrt_data->data));
351}
352
353static int
354hwrt_data_init_fw_structure(struct pvr_file *pvr_file,
355			    struct pvr_hwrt_dataset *hwrt,
356			    struct drm_pvr_ioctl_create_hwrt_dataset_args *args,
357			    struct drm_pvr_create_hwrt_rt_data_args *rt_data_args,
358			    struct pvr_hwrt_data *hwrt_data)
359{
360	struct drm_pvr_create_hwrt_geom_data_args *geom_data_args = &args->geom_data_args;
361	struct pvr_device *pvr_dev = pvr_file->pvr_dev;
362	struct rogue_fwif_rta_ctl *rta_ctl;
363	int err;
364
365	pvr_fw_object_get_fw_addr(hwrt->common_fw_obj,
366				  &hwrt_data->data.hwrt_data_common_fw_addr);
367
368	for (int free_list_i = 0; free_list_i < ARRAY_SIZE(hwrt->free_lists); free_list_i++) {
369		pvr_fw_object_get_fw_addr(hwrt->free_lists[free_list_i]->fw_obj,
370					  &hwrt_data->data.freelists_fw_addr[free_list_i]);
371	}
372
373	hwrt_data->data.tail_ptrs_dev_addr = geom_data_args->tpc_dev_addr;
374	hwrt_data->data.vheap_table_dev_addr = geom_data_args->vheap_table_dev_addr;
375	hwrt_data->data.rtc_dev_addr = geom_data_args->rtc_dev_addr;
376
377	hwrt_data->data.pm_mlist_dev_addr = rt_data_args->pm_mlist_dev_addr;
378	hwrt_data->data.macrotile_array_dev_addr = rt_data_args->macrotile_array_dev_addr;
379	hwrt_data->data.rgn_header_dev_addr = rt_data_args->region_header_dev_addr;
380
381	rta_ctl = &hwrt_data->data.rta_ctl;
382
383	rta_ctl->render_target_index = 0;
384	rta_ctl->active_render_targets = 0;
385	rta_ctl->valid_render_targets_fw_addr = 0;
386	rta_ctl->rta_num_partial_renders_fw_addr = 0;
387	rta_ctl->max_rts = args->layers;
388
389	if (args->layers > 1) {
390		err = pvr_fw_object_create(pvr_dev, args->layers * SRTC_ENTRY_SIZE,
391					   PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
392					   NULL, NULL, &hwrt_data->srtc_obj);
393		if (err)
394			return err;
395		pvr_fw_object_get_fw_addr(hwrt_data->srtc_obj,
396					  &rta_ctl->valid_render_targets_fw_addr);
397
398		err = pvr_fw_object_create(pvr_dev, args->layers * RAA_ENTRY_SIZE,
399					   PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
400					   NULL, NULL, &hwrt_data->raa_obj);
401		if (err)
402			goto err_put_shadow_rt_cache;
403		pvr_fw_object_get_fw_addr(hwrt_data->raa_obj,
404					  &rta_ctl->rta_num_partial_renders_fw_addr);
405	}
406
407	err = pvr_fw_object_create(pvr_dev, sizeof(struct rogue_fwif_hwrtdata),
408				   PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
409				   hwrt_fw_data_init, hwrt_data, &hwrt_data->fw_obj);
410	if (err)
411		goto err_put_raa_obj;
412
413	pvr_free_list_add_hwrt(hwrt->free_lists[0], hwrt_data);
414
415	return 0;
416
417err_put_raa_obj:
418	if (args->layers > 1)
419		pvr_fw_object_destroy(hwrt_data->raa_obj);
420
421err_put_shadow_rt_cache:
422	if (args->layers > 1)
423		pvr_fw_object_destroy(hwrt_data->srtc_obj);
424
425	return err;
426}
427
428static void
429hwrt_data_fini_fw_structure(struct pvr_hwrt_dataset *hwrt, int hwrt_nr)
430{
431	struct pvr_hwrt_data *hwrt_data = &hwrt->data[hwrt_nr];
432
433	pvr_free_list_remove_hwrt(hwrt->free_lists[0], hwrt_data);
434
435	if (hwrt->max_rts > 1) {
436		pvr_fw_object_destroy(hwrt_data->raa_obj);
437		pvr_fw_object_destroy(hwrt_data->srtc_obj);
438	}
439
440	pvr_fw_object_destroy(hwrt_data->fw_obj);
441}
442
443/**
444 * pvr_hwrt_dataset_create() - Create a new HWRT dataset
445 * @pvr_file: Pointer to pvr_file structure.
446 * @args: Creation arguments from userspace.
447 *
448 * Return:
449 *  * Pointer to new HWRT, or
450 *  * ERR_PTR(-%ENOMEM) on out of memory.
451 */
452struct pvr_hwrt_dataset *
453pvr_hwrt_dataset_create(struct pvr_file *pvr_file,
454			struct drm_pvr_ioctl_create_hwrt_dataset_args *args)
455{
456	struct pvr_hwrt_dataset *hwrt;
457	int err, i = 0;
458
459	/* Create and fill out the kernel structure */
460	hwrt = kzalloc(sizeof(*hwrt), GFP_KERNEL);
461
462	if (!hwrt)
463		return ERR_PTR(-ENOMEM);
464
465	err = hwrt_init_kernel_structure(pvr_file, args, hwrt);
466	if (err < 0)
467		goto err_free;
468
469	err = hwrt_init_common_fw_structure(pvr_file, args, hwrt);
470	if (err < 0)
471		goto err_fini_kernel_structure;
472
473	for (; i < ARRAY_SIZE(hwrt->data); i++) {
474		err = hwrt_data_init_fw_structure(pvr_file, hwrt, args,
475						  &args->rt_data_args[i],
476						  &hwrt->data[i]);
477		if (err < 0)
478			goto err_fini_data_structures;
479
480		hwrt->data[i].hwrt_dataset = hwrt;
481	}
482
483	kref_init(&hwrt->ref_count);
484	return hwrt;
485
486err_fini_data_structures:
487	while (--i >= 0)
488		hwrt_data_fini_fw_structure(hwrt, i);
489
490err_fini_kernel_structure:
491	hwrt_fini_kernel_structure(hwrt);
492
493err_free:
494	kfree(hwrt);
495
496	return ERR_PTR(err);
497}
498
499static void
500pvr_hwrt_dataset_release(struct kref *ref_count)
501{
502	struct pvr_hwrt_dataset *hwrt =
503		container_of(ref_count, struct pvr_hwrt_dataset, ref_count);
504
505	for (int i = ARRAY_SIZE(hwrt->data) - 1; i >= 0; i--) {
506		WARN_ON(pvr_fw_structure_cleanup(hwrt->pvr_dev, ROGUE_FWIF_CLEANUP_HWRTDATA,
507						 hwrt->data[i].fw_obj, 0));
508		hwrt_data_fini_fw_structure(hwrt, i);
509	}
510
511	hwrt_fini_common_fw_structure(hwrt);
512	hwrt_fini_kernel_structure(hwrt);
513
514	kfree(hwrt);
515}
516
517/**
518 * pvr_destroy_hwrt_datasets_for_file: Destroy any HWRT datasets associated
519 * with the given file.
520 * @pvr_file: Pointer to pvr_file structure.
521 *
522 * Removes all HWRT datasets associated with @pvr_file from the device
523 * hwrt_dataset list and drops initial references. HWRT datasets will then be
524 * destroyed once all outstanding references are dropped.
525 */
526void pvr_destroy_hwrt_datasets_for_file(struct pvr_file *pvr_file)
527{
528	struct pvr_hwrt_dataset *hwrt;
529	unsigned long handle;
530
531	xa_for_each(&pvr_file->hwrt_handles, handle, hwrt) {
532		(void)hwrt;
533		pvr_hwrt_dataset_put(xa_erase(&pvr_file->hwrt_handles, handle));
534	}
535}
536
537/**
538 * pvr_hwrt_dataset_put() - Release reference on HWRT dataset
539 * @hwrt: Pointer to HWRT dataset to release reference on
540 */
541void
542pvr_hwrt_dataset_put(struct pvr_hwrt_dataset *hwrt)
543{
544	if (hwrt)
545		kref_put(&hwrt->ref_count, pvr_hwrt_dataset_release);
546}