root/drivers/media/platform/mtk-vcodec/vdec/vdec_h264_if.c

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DEFINITIONS

This source file includes following definitions.
  1. get_mv_buf_size
  2. allocate_predication_buf
  3. free_predication_buf
  4. alloc_mv_buf
  5. free_mv_buf
  6. check_list_validity
  7. put_fb_to_free
  8. get_pic_info
  9. get_crop_info
  10. get_dpb_size
  11. vdec_h264_init
  12. vdec_h264_deinit
  13. find_start_code
  14. vdec_h264_decode
  15. vdec_h264_get_fb
  16. vdec_h264_get_param

   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_util.h"
  12 #include "../mtk_vcodec_dec.h"
  13 #include "../mtk_vcodec_intr.h"
  14 #include "../vdec_vpu_if.h"
  15 #include "../vdec_drv_base.h"
  16 
  17 #define NAL_NON_IDR_SLICE                       0x01
  18 #define NAL_IDR_SLICE                           0x05
  19 #define NAL_H264_PPS                            0x08
  20 #define NAL_TYPE(value)                         ((value) & 0x1F)
  21 
  22 #define BUF_PREDICTION_SZ                       (32 * 1024)
  23 
  24 #define MB_UNIT_LEN                             16
  25 
  26 /* motion vector size (bytes) for every macro block */
  27 #define HW_MB_STORE_SZ                          64
  28 
  29 #define H264_MAX_FB_NUM                         17
  30 #define HDR_PARSING_BUF_SZ                      1024
  31 
  32 #define DEC_ERR_RET(ret)                        ((ret) >> 16)
  33 #define H264_ERR_NOT_VALID                      3
  34 
  35 /**
  36  * struct h264_fb - h264 decode frame buffer information
  37  * @vdec_fb_va  : virtual address of struct vdec_fb
  38  * @y_fb_dma    : dma address of Y frame buffer (luma)
  39  * @c_fb_dma    : dma address of C frame buffer (chroma)
  40  * @poc         : picture order count of frame buffer
  41  * @reserved    : for 8 bytes alignment
  42  */
  43 struct h264_fb {
  44         uint64_t vdec_fb_va;
  45         uint64_t y_fb_dma;
  46         uint64_t c_fb_dma;
  47         int32_t poc;
  48         uint32_t reserved;
  49 };
  50 
  51 /**
  52  * struct h264_ring_fb_list - ring frame buffer list
  53  * @fb_list   : frame buffer array
  54  * @read_idx  : read index
  55  * @write_idx : write index
  56  * @count     : buffer count in list
  57  * @reserved  : for 8 bytes alignment
  58  */
  59 struct h264_ring_fb_list {
  60         struct h264_fb fb_list[H264_MAX_FB_NUM];
  61         unsigned int read_idx;
  62         unsigned int write_idx;
  63         unsigned int count;
  64         unsigned int reserved;
  65 };
  66 
  67 /**
  68  * struct vdec_h264_dec_info - decode information
  69  * @dpb_sz              : decoding picture buffer size
  70  * @resolution_changed  : resolution change happen
  71  * @realloc_mv_buf      : flag to notify driver to re-allocate mv buffer
  72  * @reserved            : for 8 bytes alignment
  73  * @bs_dma              : Input bit-stream buffer dma address
  74  * @y_fb_dma            : Y frame buffer dma address
  75  * @c_fb_dma            : C frame buffer dma address
  76  * @vdec_fb_va          : VDEC frame buffer struct virtual address
  77  */
  78 struct vdec_h264_dec_info {
  79         uint32_t dpb_sz;
  80         uint32_t resolution_changed;
  81         uint32_t realloc_mv_buf;
  82         uint32_t reserved;
  83         uint64_t bs_dma;
  84         uint64_t y_fb_dma;
  85         uint64_t c_fb_dma;
  86         uint64_t vdec_fb_va;
  87 };
  88 
  89 /**
  90  * struct vdec_h264_vsi - shared memory for decode information exchange
  91  *                        between VPU and Host.
  92  *                        The memory is allocated by VPU then mapping to Host
  93  *                        in vpu_dec_init() and freed in vpu_dec_deinit()
  94  *                        by VPU.
  95  *                        AP-W/R : AP is writer/reader on this item
  96  *                        VPU-W/R: VPU is write/reader on this item
  97  * @hdr_buf      : Header parsing buffer (AP-W, VPU-R)
  98  * @pred_buf_dma : HW working predication buffer dma address (AP-W, VPU-R)
  99  * @mv_buf_dma   : HW working motion vector buffer dma address (AP-W, VPU-R)
 100  * @list_free    : free frame buffer ring list (AP-W/R, VPU-W)
 101  * @list_disp    : display frame buffer ring list (AP-R, VPU-W)
 102  * @dec          : decode information (AP-R, VPU-W)
 103  * @pic          : picture information (AP-R, VPU-W)
 104  * @crop         : crop information (AP-R, VPU-W)
 105  */
 106 struct vdec_h264_vsi {
 107         unsigned char hdr_buf[HDR_PARSING_BUF_SZ];
 108         uint64_t pred_buf_dma;
 109         uint64_t mv_buf_dma[H264_MAX_FB_NUM];
 110         struct h264_ring_fb_list list_free;
 111         struct h264_ring_fb_list list_disp;
 112         struct vdec_h264_dec_info dec;
 113         struct vdec_pic_info pic;
 114         struct v4l2_rect crop;
 115 };
 116 
 117 /**
 118  * struct vdec_h264_inst - h264 decoder instance
 119  * @num_nalu : how many nalus be decoded
 120  * @ctx      : point to mtk_vcodec_ctx
 121  * @pred_buf : HW working predication buffer
 122  * @mv_buf   : HW working motion vector buffer
 123  * @vpu      : VPU instance
 124  * @vsi      : VPU shared information
 125  */
 126 struct vdec_h264_inst {
 127         unsigned int num_nalu;
 128         struct mtk_vcodec_ctx *ctx;
 129         struct mtk_vcodec_mem pred_buf;
 130         struct mtk_vcodec_mem mv_buf[H264_MAX_FB_NUM];
 131         struct vdec_vpu_inst vpu;
 132         struct vdec_h264_vsi *vsi;
 133 };
 134 
 135 static unsigned int get_mv_buf_size(unsigned int width, unsigned int height)
 136 {
 137         return HW_MB_STORE_SZ * (width/MB_UNIT_LEN) * (height/MB_UNIT_LEN);
 138 }
 139 
 140 static int allocate_predication_buf(struct vdec_h264_inst *inst)
 141 {
 142         int err = 0;
 143 
 144         inst->pred_buf.size = BUF_PREDICTION_SZ;
 145         err = mtk_vcodec_mem_alloc(inst->ctx, &inst->pred_buf);
 146         if (err) {
 147                 mtk_vcodec_err(inst, "failed to allocate ppl buf");
 148                 return err;
 149         }
 150 
 151         inst->vsi->pred_buf_dma = inst->pred_buf.dma_addr;
 152         return 0;
 153 }
 154 
 155 static void free_predication_buf(struct vdec_h264_inst *inst)
 156 {
 157         struct mtk_vcodec_mem *mem = NULL;
 158 
 159         mtk_vcodec_debug_enter(inst);
 160 
 161         inst->vsi->pred_buf_dma = 0;
 162         mem = &inst->pred_buf;
 163         if (mem->va)
 164                 mtk_vcodec_mem_free(inst->ctx, mem);
 165 }
 166 
 167 static int alloc_mv_buf(struct vdec_h264_inst *inst, struct vdec_pic_info *pic)
 168 {
 169         int i;
 170         int err;
 171         struct mtk_vcodec_mem *mem = NULL;
 172         unsigned int buf_sz = get_mv_buf_size(pic->buf_w, pic->buf_h);
 173 
 174         for (i = 0; i < H264_MAX_FB_NUM; i++) {
 175                 mem = &inst->mv_buf[i];
 176                 if (mem->va)
 177                         mtk_vcodec_mem_free(inst->ctx, mem);
 178                 mem->size = buf_sz;
 179                 err = mtk_vcodec_mem_alloc(inst->ctx, mem);
 180                 if (err) {
 181                         mtk_vcodec_err(inst, "failed to allocate mv buf");
 182                         return err;
 183                 }
 184                 inst->vsi->mv_buf_dma[i] = mem->dma_addr;
 185         }
 186 
 187         return 0;
 188 }
 189 
 190 static void free_mv_buf(struct vdec_h264_inst *inst)
 191 {
 192         int i;
 193         struct mtk_vcodec_mem *mem = NULL;
 194 
 195         for (i = 0; i < H264_MAX_FB_NUM; i++) {
 196                 inst->vsi->mv_buf_dma[i] = 0;
 197                 mem = &inst->mv_buf[i];
 198                 if (mem->va)
 199                         mtk_vcodec_mem_free(inst->ctx, mem);
 200         }
 201 }
 202 
 203 static int check_list_validity(struct vdec_h264_inst *inst, bool disp_list)
 204 {
 205         struct h264_ring_fb_list *list;
 206 
 207         list = disp_list ? &inst->vsi->list_disp : &inst->vsi->list_free;
 208 
 209         if (list->count > H264_MAX_FB_NUM ||
 210             list->read_idx >= H264_MAX_FB_NUM ||
 211             list->write_idx >= H264_MAX_FB_NUM) {
 212                 mtk_vcodec_err(inst, "%s list err: cnt=%d r_idx=%d w_idx=%d",
 213                                disp_list ? "disp" : "free", list->count,
 214                                list->read_idx, list->write_idx);
 215                 return -EINVAL;
 216         }
 217 
 218         return 0;
 219 }
 220 
 221 static void put_fb_to_free(struct vdec_h264_inst *inst, struct vdec_fb *fb)
 222 {
 223         struct h264_ring_fb_list *list;
 224 
 225         if (fb) {
 226                 if (check_list_validity(inst, false))
 227                         return;
 228 
 229                 list = &inst->vsi->list_free;
 230                 if (list->count == H264_MAX_FB_NUM) {
 231                         mtk_vcodec_err(inst, "[FB] put fb free_list full");
 232                         return;
 233                 }
 234 
 235                 mtk_vcodec_debug(inst, "[FB] put fb into free_list @(%p, %llx)",
 236                                  fb->base_y.va, (u64)fb->base_y.dma_addr);
 237 
 238                 list->fb_list[list->write_idx].vdec_fb_va = (u64)(uintptr_t)fb;
 239                 list->write_idx = (list->write_idx == H264_MAX_FB_NUM - 1) ?
 240                                   0 : list->write_idx + 1;
 241                 list->count++;
 242         }
 243 }
 244 
 245 static void get_pic_info(struct vdec_h264_inst *inst,
 246                          struct vdec_pic_info *pic)
 247 {
 248         *pic = inst->vsi->pic;
 249         mtk_vcodec_debug(inst, "pic(%d, %d), buf(%d, %d)",
 250                          pic->pic_w, pic->pic_h, pic->buf_w, pic->buf_h);
 251         mtk_vcodec_debug(inst, "fb size: Y(%d), C(%d)",
 252                          pic->fb_sz[0], pic->fb_sz[1]);
 253 }
 254 
 255 static void get_crop_info(struct vdec_h264_inst *inst, struct v4l2_rect *cr)
 256 {
 257         cr->left = inst->vsi->crop.left;
 258         cr->top = inst->vsi->crop.top;
 259         cr->width = inst->vsi->crop.width;
 260         cr->height = inst->vsi->crop.height;
 261 
 262         mtk_vcodec_debug(inst, "l=%d, t=%d, w=%d, h=%d",
 263                          cr->left, cr->top, cr->width, cr->height);
 264 }
 265 
 266 static void get_dpb_size(struct vdec_h264_inst *inst, unsigned int *dpb_sz)
 267 {
 268         *dpb_sz = inst->vsi->dec.dpb_sz;
 269         mtk_vcodec_debug(inst, "sz=%d", *dpb_sz);
 270 }
 271 
 272 static int vdec_h264_init(struct mtk_vcodec_ctx *ctx)
 273 {
 274         struct vdec_h264_inst *inst = NULL;
 275         int err;
 276 
 277         inst = kzalloc(sizeof(*inst), GFP_KERNEL);
 278         if (!inst)
 279                 return -ENOMEM;
 280 
 281         inst->ctx = ctx;
 282 
 283         inst->vpu.id = IPI_VDEC_H264;
 284         inst->vpu.dev = ctx->dev->vpu_plat_dev;
 285         inst->vpu.ctx = ctx;
 286         inst->vpu.handler = vpu_dec_ipi_handler;
 287 
 288         err = vpu_dec_init(&inst->vpu);
 289         if (err) {
 290                 mtk_vcodec_err(inst, "vdec_h264 init err=%d", err);
 291                 goto error_free_inst;
 292         }
 293 
 294         inst->vsi = (struct vdec_h264_vsi *)inst->vpu.vsi;
 295         err = allocate_predication_buf(inst);
 296         if (err)
 297                 goto error_deinit;
 298 
 299         mtk_vcodec_debug(inst, "H264 Instance >> %p", inst);
 300 
 301         ctx->drv_handle = inst;
 302         return 0;
 303 
 304 error_deinit:
 305         vpu_dec_deinit(&inst->vpu);
 306 
 307 error_free_inst:
 308         kfree(inst);
 309         return err;
 310 }
 311 
 312 static void vdec_h264_deinit(void *h_vdec)
 313 {
 314         struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
 315 
 316         mtk_vcodec_debug_enter(inst);
 317 
 318         vpu_dec_deinit(&inst->vpu);
 319         free_predication_buf(inst);
 320         free_mv_buf(inst);
 321 
 322         kfree(inst);
 323 }
 324 
 325 static int find_start_code(unsigned char *data, unsigned int data_sz)
 326 {
 327         if (data_sz > 3 && data[0] == 0 && data[1] == 0 && data[2] == 1)
 328                 return 3;
 329 
 330         if (data_sz > 4 && data[0] == 0 && data[1] == 0 && data[2] == 0 &&
 331             data[3] == 1)
 332                 return 4;
 333 
 334         return -1;
 335 }
 336 
 337 static int vdec_h264_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
 338                             struct vdec_fb *fb, bool *res_chg)
 339 {
 340         struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
 341         struct vdec_vpu_inst *vpu = &inst->vpu;
 342         int nal_start_idx = 0;
 343         int err = 0;
 344         unsigned int nal_start;
 345         unsigned int nal_type;
 346         unsigned char *buf;
 347         unsigned int buf_sz;
 348         unsigned int data[2];
 349         uint64_t vdec_fb_va = (u64)(uintptr_t)fb;
 350         uint64_t y_fb_dma = fb ? (u64)fb->base_y.dma_addr : 0;
 351         uint64_t c_fb_dma = fb ? (u64)fb->base_c.dma_addr : 0;
 352 
 353         mtk_vcodec_debug(inst, "+ [%d] FB y_dma=%llx c_dma=%llx va=%p",
 354                          ++inst->num_nalu, y_fb_dma, c_fb_dma, fb);
 355 
 356         /* bs NULL means flush decoder */
 357         if (bs == NULL)
 358                 return vpu_dec_reset(vpu);
 359 
 360         buf = (unsigned char *)bs->va;
 361         buf_sz = bs->size;
 362         nal_start_idx = find_start_code(buf, buf_sz);
 363         if (nal_start_idx < 0) {
 364                 mtk_vcodec_err(inst, "invalid nal start code");
 365                 err = -EIO;
 366                 goto err_free_fb_out;
 367         }
 368 
 369         nal_start = buf[nal_start_idx];
 370         nal_type = NAL_TYPE(buf[nal_start_idx]);
 371         mtk_vcodec_debug(inst, "\n + NALU[%d] type %d +\n", inst->num_nalu,
 372                          nal_type);
 373 
 374         if (nal_type == NAL_H264_PPS) {
 375                 buf_sz -= nal_start_idx;
 376                 if (buf_sz > HDR_PARSING_BUF_SZ) {
 377                         err = -EILSEQ;
 378                         goto err_free_fb_out;
 379                 }
 380                 memcpy(inst->vsi->hdr_buf, buf + nal_start_idx, buf_sz);
 381         }
 382 
 383         inst->vsi->dec.bs_dma = (uint64_t)bs->dma_addr;
 384         inst->vsi->dec.y_fb_dma = y_fb_dma;
 385         inst->vsi->dec.c_fb_dma = c_fb_dma;
 386         inst->vsi->dec.vdec_fb_va = vdec_fb_va;
 387 
 388         data[0] = buf_sz;
 389         data[1] = nal_start;
 390         err = vpu_dec_start(vpu, data, 2);
 391         if (err) {
 392                 if (err > 0 && (DEC_ERR_RET(err) == H264_ERR_NOT_VALID)) {
 393                         mtk_vcodec_err(inst, "- error bitstream - err = %d -",
 394                                        err);
 395                         err = -EIO;
 396                 }
 397                 goto err_free_fb_out;
 398         }
 399 
 400         *res_chg = inst->vsi->dec.resolution_changed;
 401         if (*res_chg) {
 402                 struct vdec_pic_info pic;
 403 
 404                 mtk_vcodec_debug(inst, "- resolution changed -");
 405                 get_pic_info(inst, &pic);
 406 
 407                 if (inst->vsi->dec.realloc_mv_buf) {
 408                         err = alloc_mv_buf(inst, &pic);
 409                         if (err)
 410                                 goto err_free_fb_out;
 411                 }
 412         }
 413 
 414         if (nal_type == NAL_NON_IDR_SLICE || nal_type == NAL_IDR_SLICE) {
 415                 /* wait decoder done interrupt */
 416                 err = mtk_vcodec_wait_for_done_ctx(inst->ctx,
 417                                                    MTK_INST_IRQ_RECEIVED,
 418                                                    WAIT_INTR_TIMEOUT_MS);
 419                 if (err)
 420                         goto err_free_fb_out;
 421 
 422                 vpu_dec_end(vpu);
 423         }
 424 
 425         mtk_vcodec_debug(inst, "\n - NALU[%d] type=%d -\n", inst->num_nalu,
 426                          nal_type);
 427         return 0;
 428 
 429 err_free_fb_out:
 430         put_fb_to_free(inst, fb);
 431         mtk_vcodec_err(inst, "\n - NALU[%d] err=%d -\n", inst->num_nalu, err);
 432         return err;
 433 }
 434 
 435 static void vdec_h264_get_fb(struct vdec_h264_inst *inst,
 436                              struct h264_ring_fb_list *list,
 437                              bool disp_list, struct vdec_fb **out_fb)
 438 {
 439         struct vdec_fb *fb;
 440 
 441         if (check_list_validity(inst, disp_list))
 442                 return;
 443 
 444         if (list->count == 0) {
 445                 mtk_vcodec_debug(inst, "[FB] there is no %s fb",
 446                                  disp_list ? "disp" : "free");
 447                 *out_fb = NULL;
 448                 return;
 449         }
 450 
 451         fb = (struct vdec_fb *)
 452                 (uintptr_t)list->fb_list[list->read_idx].vdec_fb_va;
 453         fb->status |= (disp_list ? FB_ST_DISPLAY : FB_ST_FREE);
 454 
 455         *out_fb = fb;
 456         mtk_vcodec_debug(inst, "[FB] get %s fb st=%d poc=%d %llx",
 457                          disp_list ? "disp" : "free",
 458                          fb->status, list->fb_list[list->read_idx].poc,
 459                          list->fb_list[list->read_idx].vdec_fb_va);
 460 
 461         list->read_idx = (list->read_idx == H264_MAX_FB_NUM - 1) ?
 462                          0 : list->read_idx + 1;
 463         list->count--;
 464 }
 465 
 466 static int vdec_h264_get_param(void *h_vdec, enum vdec_get_param_type type,
 467                                void *out)
 468 {
 469         struct vdec_h264_inst *inst = (struct vdec_h264_inst *)h_vdec;
 470 
 471         switch (type) {
 472         case GET_PARAM_DISP_FRAME_BUFFER:
 473                 vdec_h264_get_fb(inst, &inst->vsi->list_disp, true, out);
 474                 break;
 475 
 476         case GET_PARAM_FREE_FRAME_BUFFER:
 477                 vdec_h264_get_fb(inst, &inst->vsi->list_free, false, out);
 478                 break;
 479 
 480         case GET_PARAM_PIC_INFO:
 481                 get_pic_info(inst, out);
 482                 break;
 483 
 484         case GET_PARAM_DPB_SIZE:
 485                 get_dpb_size(inst, out);
 486                 break;
 487 
 488         case GET_PARAM_CROP_INFO:
 489                 get_crop_info(inst, out);
 490                 break;
 491 
 492         default:
 493                 mtk_vcodec_err(inst, "invalid get parameter type=%d", type);
 494                 return -EINVAL;
 495         }
 496 
 497         return 0;
 498 }
 499 
 500 const struct vdec_common_if vdec_h264_if = {
 501         .init           = vdec_h264_init,
 502         .decode         = vdec_h264_decode,
 503         .get_param      = vdec_h264_get_param,
 504         .deinit         = vdec_h264_deinit,
 505 };

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