1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (c) 2016 MediaTek Inc. 4 * Author: PC Chen <pc.chen@mediatek.com> 5 */ 6 7#include <linux/module.h> 8#include <linux/slab.h> 9 10#include "../vdec_drv_if.h" 11#include "../mtk_vcodec_dec.h" 12#include "../../common/mtk_vcodec_intr.h" 13#include "../vdec_vpu_if.h" 14#include "../vdec_drv_base.h" 15 16#define NAL_NON_IDR_SLICE 0x01 17#define NAL_IDR_SLICE 0x05 18#define NAL_H264_PPS 0x08 19#define NAL_TYPE(value) ((value) & 0x1F) 20 21#define BUF_PREDICTION_SZ (32 * 1024) 22 23#define MB_UNIT_LEN 16 24 25/* motion vector size (bytes) for every macro block */ 26#define HW_MB_STORE_SZ 64 27 28#define H264_MAX_FB_NUM 17 29#define HDR_PARSING_BUF_SZ 1024 30 31#define DEC_ERR_RET(ret) ((ret) >> 16) 32#define H264_ERR_NOT_VALID 3 33 34/** 35 * struct h264_fb - h264 decode frame buffer information 36 * @vdec_fb_va : virtual address of struct vdec_fb 37 * @y_fb_dma : dma address of Y frame buffer (luma) 38 * @c_fb_dma : dma address of C frame buffer (chroma) 39 * @poc : picture order count of frame buffer 40 * @reserved : for 8 bytes alignment 41 */ 42struct h264_fb { 43 uint64_t vdec_fb_va; 44 uint64_t y_fb_dma; 45 uint64_t c_fb_dma; 46 int32_t poc; 47 uint32_t reserved; 48}; 49 50/** 51 * struct h264_ring_fb_list - ring frame buffer list 52 * @fb_list : frame buffer array 53 * @read_idx : read index 54 * @write_idx : write index 55 * @count : buffer count in list 56 * @reserved : for 8 bytes alignment 57 */ 58struct h264_ring_fb_list { 59 struct h264_fb fb_list[H264_MAX_FB_NUM]; 60 unsigned int read_idx; 61 unsigned int write_idx; 62 unsigned int count; 63 unsigned int reserved; 64}; 65 66/** 67 * struct vdec_h264_dec_info - decode information 68 * @dpb_sz : decoding picture buffer size 69 * @resolution_changed : resolution change happen 70 * @realloc_mv_buf : flag to notify driver to re-allocate mv buffer 71 * @reserved : for 8 bytes alignment 72 * @bs_dma : Input bit-stream buffer dma address 73 * @y_fb_dma : Y frame buffer dma address 74 * @c_fb_dma : C frame buffer dma address 75 * @vdec_fb_va : VDEC frame buffer struct virtual address 76 */ 77struct vdec_h264_dec_info { 78 uint32_t dpb_sz; 79 uint32_t resolution_changed; 80 uint32_t realloc_mv_buf; 81 uint32_t reserved; 82 uint64_t bs_dma; 83 uint64_t y_fb_dma; 84 uint64_t c_fb_dma; 85 uint64_t vdec_fb_va; 86}; 87 88/** 89 * struct vdec_h264_vsi - shared memory for decode information exchange 90 * between VPU and Host. 91 * The memory is allocated by VPU then mapping to Host 92 * in vpu_dec_init() and freed in vpu_dec_deinit() 93 * by VPU. 94 * AP-W/R : AP is writer/reader on this item 95 * VPU-W/R: VPU is write/reader on this item 96 * @hdr_buf : Header parsing buffer (AP-W, VPU-R) 97 * @pred_buf_dma : HW working predication buffer dma address (AP-W, VPU-R) 98 * @mv_buf_dma : HW working motion vector buffer dma address (AP-W, VPU-R) 99 * @list_free : free frame buffer ring list (AP-W/R, VPU-W) 100 * @list_disp : display frame buffer ring list (AP-R, VPU-W) 101 * @dec : decode information (AP-R, VPU-W) 102 * @pic : picture information (AP-R, VPU-W) 103 * @crop : crop information (AP-R, VPU-W) 104 */ 105struct vdec_h264_vsi { 106 unsigned char hdr_buf[HDR_PARSING_BUF_SZ]; 107 uint64_t pred_buf_dma; 108 uint64_t mv_buf_dma[H264_MAX_FB_NUM]; 109 struct h264_ring_fb_list list_free; 110 struct h264_ring_fb_list list_disp; 111 struct vdec_h264_dec_info dec; 112 struct vdec_pic_info pic; 113 struct v4l2_rect crop; 114}; 115 116/** 117 * struct vdec_h264_inst - h264 decoder instance 118 * @num_nalu : how many nalus be decoded 119 * @ctx : point to mtk_vcodec_dec_ctx 120 * @pred_buf : HW working predication buffer 121 * @mv_buf : HW working motion vector buffer 122 * @vpu : VPU instance 123 * @vsi : VPU shared information 124 */ 125struct vdec_h264_inst { 126 unsigned int num_nalu; 127 struct mtk_vcodec_dec_ctx *ctx; 128 struct mtk_vcodec_mem pred_buf; 129 struct mtk_vcodec_mem mv_buf[H264_MAX_FB_NUM]; 130 struct vdec_vpu_inst vpu; 131 struct vdec_h264_vsi *vsi; 132}; 133 134static unsigned int get_mv_buf_size(unsigned int width, unsigned int height) 135{ 136 return HW_MB_STORE_SZ * (width/MB_UNIT_LEN) * (height/MB_UNIT_LEN); 137} 138 139static int allocate_predication_buf(struct vdec_h264_inst *inst) 140{ 141 int err = 0; 142 143 inst->pred_buf.size = BUF_PREDICTION_SZ; 144 err = mtk_vcodec_mem_alloc(inst->ctx, &inst->pred_buf); 145 if (err) { 146 mtk_vdec_err(inst->ctx, "failed to allocate ppl buf"); 147 return err; 148 } 149 150 inst->vsi->pred_buf_dma = inst->pred_buf.dma_addr; 151 return 0; 152} 153 154static void free_predication_buf(struct vdec_h264_inst *inst) 155{ 156 struct mtk_vcodec_mem *mem = NULL; 157 158 inst->vsi->pred_buf_dma = 0; 159 mem = &inst->pred_buf; 160 if (mem->va) 161 mtk_vcodec_mem_free(inst->ctx, mem); 162} 163 164static int alloc_mv_buf(struct vdec_h264_inst *inst, struct vdec_pic_info *pic) 165{ 166 int i; 167 int err; 168 struct mtk_vcodec_mem *mem = NULL; 169 unsigned int buf_sz = get_mv_buf_size(pic->buf_w, pic->buf_h); 170 171 for (i = 0; i < H264_MAX_FB_NUM; i++) { 172 mem = &inst->mv_buf[i]; 173 if (mem->va) 174 mtk_vcodec_mem_free(inst->ctx, mem); 175 mem->size = buf_sz; 176 err = mtk_vcodec_mem_alloc(inst->ctx, mem); 177 if (err) { 178 mtk_vdec_err(inst->ctx, "failed to allocate mv buf"); 179 return err; 180 } 181 inst->vsi->mv_buf_dma[i] = mem->dma_addr; 182 } 183 184 return 0; 185} 186 187static void free_mv_buf(struct vdec_h264_inst *inst) 188{ 189 int i; 190 struct mtk_vcodec_mem *mem = NULL; 191 192 for (i = 0; i < H264_MAX_FB_NUM; i++) { 193 inst->vsi->mv_buf_dma[i] = 0; 194 mem = &inst->mv_buf[i]; 195 if (mem->va) 196 mtk_vcodec_mem_free(inst->ctx, mem); 197 } 198} 199 200static int check_list_validity(struct vdec_h264_inst *inst, bool disp_list) 201{ 202 struct h264_ring_fb_list *list; 203 204 list = disp_list ? &inst->vsi->list_disp : &inst->vsi->list_free; 205 206 if (list->count > H264_MAX_FB_NUM || 207 list->read_idx >= H264_MAX_FB_NUM || 208 list->write_idx >= H264_MAX_FB_NUM) { 209 mtk_vdec_err(inst->ctx, "%s list err: cnt=%d r_idx=%d w_idx=%d", 210 disp_list ? "disp" : "free", list->count, 211 list->read_idx, list->write_idx); 212 return -EINVAL; 213 } 214 215 return 0; 216} 217 218static void put_fb_to_free(struct vdec_h264_inst *inst, struct vdec_fb *fb) 219{ 220 struct h264_ring_fb_list *list; 221 222 if (fb) { 223 if (check_list_validity(inst, false)) 224 return; 225 226 list = &inst->vsi->list_free; 227 if (list->count == H264_MAX_FB_NUM) { 228 mtk_vdec_err(inst->ctx, "[FB] put fb free_list full"); 229 return; 230 } 231 232 mtk_vdec_debug(inst->ctx, "[FB] put fb into free_list @(%p, %llx)", 233 fb->base_y.va, (u64)fb->base_y.dma_addr); 234 235 list->fb_list[list->write_idx].vdec_fb_va = (u64)(uintptr_t)fb; 236 list->write_idx = (list->write_idx == H264_MAX_FB_NUM - 1) ? 237 0 : list->write_idx + 1; 238 list->count++; 239 } 240} 241 242static void get_pic_info(struct vdec_h264_inst *inst, 243 struct vdec_pic_info *pic) 244{ 245 *pic = inst->vsi->pic; 246 mtk_vdec_debug(inst->ctx, "pic(%d, %d), buf(%d, %d)", 247 pic->pic_w, pic->pic_h, pic->buf_w, pic->buf_h); 248 mtk_vdec_debug(inst->ctx, "fb size: Y(%d), C(%d)", pic->fb_sz[0], pic->fb_sz[1]); 249} 250 251static void get_crop_info(struct vdec_h264_inst *inst, struct v4l2_rect *cr) 252{ 253 cr->left = inst->vsi->crop.left; 254 cr->top = inst->vsi->crop.top; 255 cr->width = inst->vsi->crop.width; 256 cr->height = inst->vsi->crop.height; 257 258 mtk_vdec_debug(inst->ctx, "l=%d, t=%d, w=%d, h=%d", cr->left, cr->top, 259 cr->width, cr->height); 260} 261 262static void get_dpb_size(struct vdec_h264_inst *inst, unsigned int *dpb_sz) 263{ 264 *dpb_sz = inst->vsi->dec.dpb_sz; 265 mtk_vdec_debug(inst->ctx, "sz=%d", *dpb_sz); 266} 267 268static int vdec_h264_init(struct mtk_vcodec_dec_ctx *ctx) 269{ 270 struct vdec_h264_inst *inst = NULL; 271 int err; 272 273 inst = kzalloc(sizeof(*inst), GFP_KERNEL); 274 if (!inst) 275 return -ENOMEM; 276 277 inst->ctx = ctx; 278 279 inst->vpu.id = IPI_VDEC_H264; 280 inst->vpu.ctx = ctx; 281 282 err = vpu_dec_init(&inst->vpu); 283 if (err) { 284 mtk_vdec_err(ctx, "vdec_h264 init err=%d", err); 285 goto error_free_inst; 286 } 287 288 inst->vsi = (struct vdec_h264_vsi *)inst->vpu.vsi; 289 err = allocate_predication_buf(inst); 290 if (err) 291 goto error_deinit; 292 293 mtk_vdec_debug(ctx, "H264 Instance >> %p", inst); 294 295 ctx->drv_handle = inst; 296 return 0; 297 298error_deinit: 299 vpu_dec_deinit(&inst->vpu); 300 301error_free_inst: 302 kfree(inst); 303 return err; 304} 305 306static void vdec_h264_deinit(void *h_vdec) 307{ 308 struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec; 309 310 vpu_dec_deinit(&inst->vpu); 311 free_predication_buf(inst); 312 free_mv_buf(inst); 313 314 kfree(inst); 315} 316 317static int find_start_code(unsigned char *data, unsigned int data_sz) 318{ 319 if (data_sz > 3 && data[0] == 0 && data[1] == 0 && data[2] == 1) 320 return 3; 321 322 if (data_sz > 4 && data[0] == 0 && data[1] == 0 && data[2] == 0 && 323 data[3] == 1) 324 return 4; 325 326 return -1; 327} 328 329static int vdec_h264_decode(void *h_vdec, struct mtk_vcodec_mem *bs, 330 struct vdec_fb *fb, bool *res_chg) 331{ 332 struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec; 333 struct vdec_vpu_inst *vpu = &inst->vpu; 334 int nal_start_idx = 0; 335 int err = 0; 336 unsigned int nal_start; 337 unsigned int nal_type; 338 unsigned char *buf; 339 unsigned int buf_sz; 340 unsigned int data[2]; 341 uint64_t vdec_fb_va = (u64)(uintptr_t)fb; 342 uint64_t y_fb_dma = fb ? (u64)fb->base_y.dma_addr : 0; 343 uint64_t c_fb_dma = fb ? (u64)fb->base_c.dma_addr : 0; 344 345 mtk_vdec_debug(inst->ctx, "+ [%d] FB y_dma=%llx c_dma=%llx va=%p", 346 ++inst->num_nalu, y_fb_dma, c_fb_dma, fb); 347 348 /* bs NULL means flush decoder */ 349 if (bs == NULL) 350 return vpu_dec_reset(vpu); 351 352 buf = (unsigned char *)bs->va; 353 buf_sz = bs->size; 354 nal_start_idx = find_start_code(buf, buf_sz); 355 if (nal_start_idx < 0) { 356 mtk_vdec_err(inst->ctx, "invalid nal start code"); 357 err = -EIO; 358 goto err_free_fb_out; 359 } 360 361 nal_start = buf[nal_start_idx]; 362 nal_type = NAL_TYPE(buf[nal_start_idx]); 363 mtk_vdec_debug(inst->ctx, "\n + NALU[%d] type %d +\n", inst->num_nalu, 364 nal_type); 365 366 if (nal_type == NAL_H264_PPS) { 367 buf_sz -= nal_start_idx; 368 if (buf_sz > HDR_PARSING_BUF_SZ) { 369 err = -EILSEQ; 370 goto err_free_fb_out; 371 } 372 memcpy(inst->vsi->hdr_buf, buf + nal_start_idx, buf_sz); 373 } 374 375 inst->vsi->dec.bs_dma = (uint64_t)bs->dma_addr; 376 inst->vsi->dec.y_fb_dma = y_fb_dma; 377 inst->vsi->dec.c_fb_dma = c_fb_dma; 378 inst->vsi->dec.vdec_fb_va = vdec_fb_va; 379 380 data[0] = buf_sz; 381 data[1] = nal_start; 382 err = vpu_dec_start(vpu, data, 2); 383 if (err) { 384 if (err > 0 && (DEC_ERR_RET(err) == H264_ERR_NOT_VALID)) { 385 mtk_vdec_err(inst->ctx, "- error bitstream - err = %d -", err); 386 err = -EIO; 387 } 388 goto err_free_fb_out; 389 } 390 391 *res_chg = inst->vsi->dec.resolution_changed; 392 if (*res_chg) { 393 struct vdec_pic_info pic; 394 395 mtk_vdec_debug(inst->ctx, "- resolution changed -"); 396 get_pic_info(inst, &pic); 397 398 if (inst->vsi->dec.realloc_mv_buf) { 399 err = alloc_mv_buf(inst, &pic); 400 if (err) 401 goto err_free_fb_out; 402 } 403 } 404 405 if (nal_type == NAL_NON_IDR_SLICE || nal_type == NAL_IDR_SLICE) { 406 /* wait decoder done interrupt */ 407 err = mtk_vcodec_wait_for_done_ctx(inst->ctx, 408 MTK_INST_IRQ_RECEIVED, 409 WAIT_INTR_TIMEOUT_MS, 0); 410 if (err) 411 goto err_free_fb_out; 412 413 vpu_dec_end(vpu); 414 } 415 416 mtk_vdec_debug(inst->ctx, "\n - NALU[%d] type=%d -\n", inst->num_nalu, nal_type); 417 return 0; 418 419err_free_fb_out: 420 put_fb_to_free(inst, fb); 421 mtk_vdec_err(inst->ctx, "\n - NALU[%d] err=%d -\n", inst->num_nalu, err); 422 return err; 423} 424 425static void vdec_h264_get_fb(struct vdec_h264_inst *inst, 426 struct h264_ring_fb_list *list, 427 bool disp_list, struct vdec_fb **out_fb) 428{ 429 struct vdec_fb *fb; 430 431 if (check_list_validity(inst, disp_list)) 432 return; 433 434 if (list->count == 0) { 435 mtk_vdec_debug(inst->ctx, "[FB] there is no %s fb", disp_list ? "disp" : "free"); 436 *out_fb = NULL; 437 return; 438 } 439 440 fb = (struct vdec_fb *) 441 (uintptr_t)list->fb_list[list->read_idx].vdec_fb_va; 442 fb->status |= (disp_list ? FB_ST_DISPLAY : FB_ST_FREE); 443 444 *out_fb = fb; 445 mtk_vdec_debug(inst->ctx, "[FB] get %s fb st=%d poc=%d %llx", 446 disp_list ? "disp" : "free", 447 fb->status, list->fb_list[list->read_idx].poc, 448 list->fb_list[list->read_idx].vdec_fb_va); 449 450 list->read_idx = (list->read_idx == H264_MAX_FB_NUM - 1) ? 451 0 : list->read_idx + 1; 452 list->count--; 453} 454 455static int vdec_h264_get_param(void *h_vdec, enum vdec_get_param_type type, 456 void *out) 457{ 458 struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec; 459 460 switch (type) { 461 case GET_PARAM_DISP_FRAME_BUFFER: 462 vdec_h264_get_fb(inst, &inst->vsi->list_disp, true, out); 463 break; 464 465 case GET_PARAM_FREE_FRAME_BUFFER: 466 vdec_h264_get_fb(inst, &inst->vsi->list_free, false, out); 467 break; 468 469 case GET_PARAM_PIC_INFO: 470 get_pic_info(inst, out); 471 break; 472 473 case GET_PARAM_DPB_SIZE: 474 get_dpb_size(inst, out); 475 break; 476 477 case GET_PARAM_CROP_INFO: 478 get_crop_info(inst, out); 479 break; 480 481 default: 482 mtk_vdec_err(inst->ctx, "invalid get parameter type=%d", type); 483 return -EINVAL; 484 } 485 486 return 0; 487} 488 489const struct vdec_common_if vdec_h264_if = { 490 .init = vdec_h264_init, 491 .decode = vdec_h264_decode, 492 .get_param = vdec_h264_get_param, 493 .deinit = vdec_h264_deinit, 494}; 495