drivers/staging/media/hantro/hantro_hevc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Hantro VPU HEVC codec driver
   4  *
   5  * Copyright (C) 2020 Safran Passenger Innovations LLC
   6  */
   7
   8 #include <linux/types.h>
   9 #include <media/v4l2-mem2mem.h>
  10
  11 #include "hantro.h"
  12 #include "hantro_hw.h"
  13
  14 #define VERT_FILTER_RAM_SIZE 8 /* bytes per pixel row */
  15 /*
  16  * BSD control data of current picture at tile border
  17  * 128 bits per 4x4 tile = 128/(8*4) bytes per row
  18  */
  19 #define BSD_CTRL_RAM_SIZE 4 /* bytes per pixel row */
  20 /* tile border coefficients of filter */
  21 #define VERT_SAO_RAM_SIZE 48 /* bytes per pixel */
  22
  23 #define SCALING_LIST_SIZE (16 * 64)
  24
  25 #define MAX_TILE_COLS 20
  26 #define MAX_TILE_ROWS 22
  27
  28 void hantro_hevc_ref_init(struct hantro_ctx *ctx)
  29 {
  30         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
  31
  32         hevc_dec->ref_bufs_used = 0;
  33 }
  34
  35 dma_addr_t hantro_hevc_get_ref_buf(struct hantro_ctx *ctx,
  36                                    int poc)
  37 {
  38         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
  39         int i;
  40
  41         /* Find the reference buffer in already known ones */
  42         for (i = 0;  i < NUM_REF_PICTURES; i++) {
  43                 if (hevc_dec->ref_bufs_poc[i] == poc) {
  44                         hevc_dec->ref_bufs_used |= 1 << i;
  45                         return hevc_dec->ref_bufs[i].dma;
  46                 }
  47         }
  48
  49         return 0;
  50 }
  51
  52 int hantro_hevc_add_ref_buf(struct hantro_ctx *ctx, int poc, dma_addr_t addr)
  53 {
  54         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
  55         int i;
  56
  57         /* Add a new reference buffer */
  58         for (i = 0; i < NUM_REF_PICTURES; i++) {
  59                 if (!(hevc_dec->ref_bufs_used & 1 << i)) {
  60                         hevc_dec->ref_bufs_used |= 1 << i;
  61                         hevc_dec->ref_bufs_poc[i] = poc;
  62                         hevc_dec->ref_bufs[i].dma = addr;
  63                         return 0;
  64                 }
  65         }
  66
  67         return -EINVAL;
  68 }
  69
  70 static int tile_buffer_reallocate(struct hantro_ctx *ctx)
  71 {
  72         struct hantro_dev *vpu = ctx->dev;
  73         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
  74         const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
  75         const struct v4l2_ctrl_hevc_pps *pps = ctrls->pps;
  76         const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
  77         unsigned int num_tile_cols = pps->num_tile_columns_minus1 + 1;
  78         unsigned int height64 = (sps->pic_height_in_luma_samples + 63) & ~63;
  79         unsigned int size;
  80
  81         if (num_tile_cols <= 1 ||
  82             num_tile_cols <= hevc_dec->num_tile_cols_allocated)
  83                 return 0;
  84
  85         /* Need to reallocate due to tiles passed via PPS */
  86         if (hevc_dec->tile_filter.cpu) {
  87                 dma_free_coherent(vpu->dev, hevc_dec->tile_filter.size,
  88                                   hevc_dec->tile_filter.cpu,
  89                                   hevc_dec->tile_filter.dma);
  90                 hevc_dec->tile_filter.cpu = NULL;
  91         }
  92
  93         if (hevc_dec->tile_sao.cpu) {
  94                 dma_free_coherent(vpu->dev, hevc_dec->tile_sao.size,
  95                                   hevc_dec->tile_sao.cpu,
  96                                   hevc_dec->tile_sao.dma);
  97                 hevc_dec->tile_sao.cpu = NULL;
  98         }
  99
 100         if (hevc_dec->tile_bsd.cpu) {
 101                 dma_free_coherent(vpu->dev, hevc_dec->tile_bsd.size,
 102                                   hevc_dec->tile_bsd.cpu,
 103                                   hevc_dec->tile_bsd.dma);
 104                 hevc_dec->tile_bsd.cpu = NULL;
 105         }
 106
 107         size = VERT_FILTER_RAM_SIZE * height64 * (num_tile_cols - 1);
 108         hevc_dec->tile_filter.cpu = dma_alloc_coherent(vpu->dev, size,
 109                                                        &hevc_dec->tile_filter.dma,
 110                                                        GFP_KERNEL);
 111         if (!hevc_dec->tile_filter.cpu)
 112                 goto err_free_tile_buffers;
 113         hevc_dec->tile_filter.size = size;
 114
 115         size = VERT_SAO_RAM_SIZE * height64 * (num_tile_cols - 1);
 116         hevc_dec->tile_sao.cpu = dma_alloc_coherent(vpu->dev, size,
 117                                                     &hevc_dec->tile_sao.dma,
 118                                                     GFP_KERNEL);
 119         if (!hevc_dec->tile_sao.cpu)
 120                 goto err_free_tile_buffers;
 121         hevc_dec->tile_sao.size = size;
 122
 123         size = BSD_CTRL_RAM_SIZE * height64 * (num_tile_cols - 1);
 124         hevc_dec->tile_bsd.cpu = dma_alloc_coherent(vpu->dev, size,
 125                                                     &hevc_dec->tile_bsd.dma,
 126                                                     GFP_KERNEL);
 127         if (!hevc_dec->tile_bsd.cpu)
 128                 goto err_free_tile_buffers;
 129         hevc_dec->tile_bsd.size = size;
 130
 131         hevc_dec->num_tile_cols_allocated = num_tile_cols;
 132
 133         return 0;
 134
 135 err_free_tile_buffers:
 136         if (hevc_dec->tile_filter.cpu)
 137                 dma_free_coherent(vpu->dev, hevc_dec->tile_filter.size,
 138                                   hevc_dec->tile_filter.cpu,
 139                                   hevc_dec->tile_filter.dma);
 140         hevc_dec->tile_filter.cpu = NULL;
 141
 142         if (hevc_dec->tile_sao.cpu)
 143                 dma_free_coherent(vpu->dev, hevc_dec->tile_sao.size,
 144                                   hevc_dec->tile_sao.cpu,
 145                                   hevc_dec->tile_sao.dma);
 146         hevc_dec->tile_sao.cpu = NULL;
 147
 148         if (hevc_dec->tile_bsd.cpu)
 149                 dma_free_coherent(vpu->dev, hevc_dec->tile_bsd.size,
 150                                   hevc_dec->tile_bsd.cpu,
 151                                   hevc_dec->tile_bsd.dma);
 152         hevc_dec->tile_bsd.cpu = NULL;
 153
 154         return -ENOMEM;
 155 }
 156
 157 int hantro_hevc_dec_prepare_run(struct hantro_ctx *ctx)
 158 {
 159         struct hantro_hevc_dec_hw_ctx *hevc_ctx = &ctx->hevc_dec;
 160         struct hantro_hevc_dec_ctrls *ctrls = &hevc_ctx->ctrls;
 161         int ret;
 162
 163         hantro_start_prepare_run(ctx);
 164
 165         ctrls->decode_params =
 166                 hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS);
 167         if (WARN_ON(!ctrls->decode_params))
 168                 return -EINVAL;
 169
 170         ctrls->scaling =
 171                 hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_HEVC_SCALING_MATRIX);
 172         if (WARN_ON(!ctrls->scaling))
 173                 return -EINVAL;
 174
 175         ctrls->sps =
 176                 hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_HEVC_SPS);
 177         if (WARN_ON(!ctrls->sps))
 178                 return -EINVAL;
 179
 180         ctrls->pps =
 181                 hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_HEVC_PPS);
 182         if (WARN_ON(!ctrls->pps))
 183                 return -EINVAL;
 184
 185         ret = tile_buffer_reallocate(ctx);
 186         if (ret)
 187                 return ret;
 188
 189         return 0;
 190 }
 191
 192 void hantro_hevc_dec_exit(struct hantro_ctx *ctx)
 193 {
 194         struct hantro_dev *vpu = ctx->dev;
 195         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
 196
 197         if (hevc_dec->tile_sizes.cpu)
 198                 dma_free_coherent(vpu->dev, hevc_dec->tile_sizes.size,
 199                                   hevc_dec->tile_sizes.cpu,
 200                                   hevc_dec->tile_sizes.dma);
 201         hevc_dec->tile_sizes.cpu = NULL;
 202
 203         if (hevc_dec->scaling_lists.cpu)
 204                 dma_free_coherent(vpu->dev, hevc_dec->scaling_lists.size,
 205                                   hevc_dec->scaling_lists.cpu,
 206                                   hevc_dec->scaling_lists.dma);
 207         hevc_dec->scaling_lists.cpu = NULL;
 208
 209         if (hevc_dec->tile_filter.cpu)
 210                 dma_free_coherent(vpu->dev, hevc_dec->tile_filter.size,
 211                                   hevc_dec->tile_filter.cpu,
 212                                   hevc_dec->tile_filter.dma);
 213         hevc_dec->tile_filter.cpu = NULL;
 214
 215         if (hevc_dec->tile_sao.cpu)
 216                 dma_free_coherent(vpu->dev, hevc_dec->tile_sao.size,
 217                                   hevc_dec->tile_sao.cpu,
 218                                   hevc_dec->tile_sao.dma);
 219         hevc_dec->tile_sao.cpu = NULL;
 220
 221         if (hevc_dec->tile_bsd.cpu)
 222                 dma_free_coherent(vpu->dev, hevc_dec->tile_bsd.size,
 223                                   hevc_dec->tile_bsd.cpu,
 224                                   hevc_dec->tile_bsd.dma);
 225         hevc_dec->tile_bsd.cpu = NULL;
 226 }
 227
 228 int hantro_hevc_dec_init(struct hantro_ctx *ctx)
 229 {
 230         struct hantro_dev *vpu = ctx->dev;
 231         struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
 232         unsigned int size;
 233
 234         memset(hevc_dec, 0, sizeof(*hevc_dec));
 235
 236         /*
 237          * Maximum number of tiles times width and height (2 bytes each),
 238          * rounding up to next 16 bytes boundary + one extra 16 byte
 239          * chunk (HW guys wanted to have this).
 240          */
 241         size = round_up(MAX_TILE_COLS * MAX_TILE_ROWS * 4 * sizeof(u16) + 16, 16);
 242         hevc_dec->tile_sizes.cpu = dma_alloc_coherent(vpu->dev, size,
 243                                                       &hevc_dec->tile_sizes.dma,
 244                                                       GFP_KERNEL);
 245         if (!hevc_dec->tile_sizes.cpu)
 246                 return -ENOMEM;
 247
 248         hevc_dec->tile_sizes.size = size;
 249
 250         hevc_dec->scaling_lists.cpu = dma_alloc_coherent(vpu->dev, SCALING_LIST_SIZE,
 251                                                          &hevc_dec->scaling_lists.dma,
 252                                                          GFP_KERNEL);
 253         if (!hevc_dec->scaling_lists.cpu)
 254                 return -ENOMEM;
 255
 256         hevc_dec->scaling_lists.size = SCALING_LIST_SIZE;
 257
 258         hantro_hevc_ref_init(ctx);
 259
 260         return 0;
 261 }