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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "hwc-platform-nv"
     18 
     19 #include "drmresources.h"
     20 #include "platform.h"
     21 #include "platformnv.h"
     22 
     23 #include <cinttypes>
     24 #include <stdatomic.h>
     25 #include <drm/drm_fourcc.h>
     26 #include <xf86drm.h>
     27 #include <xf86drmMode.h>
     28 
     29 #include <cutils/log.h>
     30 #include <hardware/gralloc.h>
     31 
     32 namespace android {
     33 
     34 #ifdef USE_NVIDIA_IMPORTER
     35 // static
     36 Importer *Importer::CreateInstance(DrmResources *drm) {
     37   NvImporter *importer = new NvImporter(drm);
     38   if (!importer)
     39     return NULL;
     40 
     41   int ret = importer->Init();
     42   if (ret) {
     43     ALOGE("Failed to initialize the nv importer %d", ret);
     44     delete importer;
     45     return NULL;
     46   }
     47   return importer;
     48 }
     49 #endif
     50 
     51 NvImporter::NvImporter(DrmResources *drm) : drm_(drm) {
     52 }
     53 
     54 NvImporter::~NvImporter() {
     55 }
     56 
     57 int NvImporter::Init() {
     58   int ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
     59                           (const hw_module_t **)&gralloc_);
     60   if (ret) {
     61     ALOGE("Failed to open gralloc module %d", ret);
     62     return ret;
     63   }
     64 
     65   if (strcasecmp(gralloc_->common.author, "NVIDIA"))
     66     ALOGW("Using non-NVIDIA gralloc module: %s/%s\n", gralloc_->common.name,
     67           gralloc_->common.author);
     68 
     69   return 0;
     70 }
     71 
     72 int NvImporter::ImportBuffer(buffer_handle_t handle, hwc_drm_bo_t *bo) {
     73   memset(bo, 0, sizeof(hwc_drm_bo_t));
     74   NvBuffer_t *buf = GrallocGetNvBuffer(handle);
     75   if (buf) {
     76     atomic_fetch_add(&buf->ref, 1);
     77     *bo = buf->bo;
     78     return 0;
     79   }
     80 
     81   buf = new NvBuffer_t();
     82   if (!buf) {
     83     ALOGE("Failed to allocate new NvBuffer_t");
     84     return -ENOMEM;
     85   }
     86   buf->bo.priv = buf;
     87   buf->importer = this;
     88 
     89   // We initialize the reference count to 2 since NvGralloc is still using this
     90   // buffer (will be cleared in the NvGrallocRelease), and the other
     91   // reference is for HWC (this ImportBuffer call).
     92   atomic_init(&buf->ref, 2);
     93 
     94   int ret = gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_DRM_IMPORT,
     95                               drm_->fd(), handle, &buf->bo);
     96   if (ret) {
     97     ALOGE("GRALLOC_MODULE_PERFORM_DRM_IMPORT failed %d", ret);
     98     delete buf;
     99     return ret;
    100   }
    101 
    102   ret = drmModeAddFB2(drm_->fd(), buf->bo.width, buf->bo.height, buf->bo.format,
    103                       buf->bo.gem_handles, buf->bo.pitches, buf->bo.offsets,
    104                       &buf->bo.fb_id, 0);
    105   if (ret) {
    106     ALOGE("Failed to add fb %d", ret);
    107     ReleaseBufferImpl(&buf->bo);
    108     delete buf;
    109     return ret;
    110   }
    111 
    112   ret = GrallocSetNvBuffer(handle, buf);
    113   if (ret) {
    114     /* This will happen is persist.tegra.gpu_mapping_cache is 0/off,
    115      * or if NV gralloc runs out of "priv slots" (currently 3 per buffer,
    116      * only one of which should be used by drm_hwcomposer). */
    117     ALOGE("Failed to register free callback for imported buffer %d", ret);
    118     ReleaseBufferImpl(&buf->bo);
    119     delete buf;
    120     return ret;
    121   }
    122   *bo = buf->bo;
    123   return 0;
    124 }
    125 
    126 int NvImporter::ReleaseBuffer(hwc_drm_bo_t *bo) {
    127   NvBuffer_t *buf = (NvBuffer_t *)bo->priv;
    128   if (!buf) {
    129     ALOGE("Freeing bo %" PRIu32 ", buf is NULL!", bo->fb_id);
    130     return 0;
    131   }
    132   if (atomic_fetch_sub(&buf->ref, 1) > 1)
    133     return 0;
    134 
    135   ReleaseBufferImpl(bo);
    136   delete buf;
    137   return 0;
    138 }
    139 
    140 // static
    141 void NvImporter::NvGrallocRelease(void *nv_buffer) {
    142   NvBuffer_t *buf = (NvBuffer *)nv_buffer;
    143   buf->importer->ReleaseBuffer(&buf->bo);
    144 }
    145 
    146 void NvImporter::ReleaseBufferImpl(hwc_drm_bo_t *bo) {
    147   if (bo->fb_id) {
    148     int ret = drmModeRmFB(drm_->fd(), bo->fb_id);
    149     if (ret)
    150       ALOGE("Failed to rm fb %d", ret);
    151   }
    152 
    153   struct drm_gem_close gem_close;
    154   memset(&gem_close, 0, sizeof(gem_close));
    155   int num_gem_handles = sizeof(bo->gem_handles) / sizeof(bo->gem_handles[0]);
    156   for (int i = 0; i < num_gem_handles; i++) {
    157     if (!bo->gem_handles[i])
    158       continue;
    159 
    160     gem_close.handle = bo->gem_handles[i];
    161     int ret = drmIoctl(drm_->fd(), DRM_IOCTL_GEM_CLOSE, &gem_close);
    162     if (ret) {
    163       ALOGE("Failed to close gem handle %d %d", i, ret);
    164     } else {
    165       /* Clear any duplicate gem handle as well but don't close again */
    166       for (int j = i + 1; j < num_gem_handles; j++)
    167         if (bo->gem_handles[j] == bo->gem_handles[i])
    168           bo->gem_handles[j] = 0;
    169       bo->gem_handles[i] = 0;
    170     }
    171   }
    172 }
    173 
    174 NvImporter::NvBuffer_t *NvImporter::GrallocGetNvBuffer(buffer_handle_t handle) {
    175   void *priv = NULL;
    176   int ret =
    177       gralloc_->perform(gralloc_, GRALLOC_MODULE_PERFORM_GET_IMPORTER_PRIVATE,
    178                         handle, NvGrallocRelease, &priv);
    179   return ret ? NULL : (NvBuffer_t *)priv;
    180 }
    181 
    182 int NvImporter::GrallocSetNvBuffer(buffer_handle_t handle, NvBuffer_t *buf) {
    183   return gralloc_->perform(gralloc_,
    184                            GRALLOC_MODULE_PERFORM_SET_IMPORTER_PRIVATE, handle,
    185                            NvGrallocRelease, buf);
    186 }
    187 
    188 #ifdef USE_NVIDIA_IMPORTER
    189 // static
    190 std::unique_ptr<Planner> Planner::CreateInstance(DrmResources *) {
    191   std::unique_ptr<Planner> planner(new Planner);
    192   planner->AddStage<PlanStageNvLimits>();
    193   planner->AddStage<PlanStageProtectedRotated>();
    194   planner->AddStage<PlanStageProtected>();
    195   planner->AddStage<PlanStagePrecomp>();
    196   planner->AddStage<PlanStageGreedy>();
    197   return planner;
    198 }
    199 #endif
    200 
    201 static DrmPlane *GetCrtcPrimaryPlane(DrmCrtc *crtc,
    202                                      std::vector<DrmPlane *> *planes) {
    203   for (auto i = planes->begin(); i != planes->end(); ++i) {
    204     if ((*i)->GetCrtcSupported(*crtc)) {
    205       DrmPlane *plane = *i;
    206       planes->erase(i);
    207       return plane;
    208     }
    209   }
    210   return NULL;
    211 }
    212 
    213 int PlanStageProtectedRotated::ProvisionPlanes(
    214     std::vector<DrmCompositionPlane> *composition,
    215     std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
    216     std::vector<DrmPlane *> *planes) {
    217   int ret;
    218   int protected_zorder = -1;
    219   for (auto i = layers.begin(); i != layers.end();) {
    220     if (!i->second->protected_usage() || !i->second->transform) {
    221       ++i;
    222       continue;
    223     }
    224 
    225     auto primary_iter = planes->begin();
    226     for (; primary_iter != planes->end(); ++primary_iter) {
    227       if ((*primary_iter)->type() == DRM_PLANE_TYPE_PRIMARY)
    228         break;
    229     }
    230 
    231     // We cheat a little here. Since there can only be one primary plane per
    232     // crtc, we know we'll only hit this case once. So we blindly insert the
    233     // protected content at the beginning of the composition, knowing this path
    234     // won't be taken a second time during the loop.
    235     if (primary_iter != planes->end()) {
    236       composition->emplace(composition->begin(),
    237                            DrmCompositionPlane::Type::kLayer, *primary_iter,
    238                            crtc, i->first);
    239       planes->erase(primary_iter);
    240       protected_zorder = i->first;
    241     } else {
    242       ALOGE("Could not provision primary plane for protected/rotated layer");
    243     }
    244     i = layers.erase(i);
    245   }
    246 
    247   if (protected_zorder == -1)
    248     return 0;
    249 
    250   // Add any layers below the protected content to the precomposition since we
    251   // need to punch a hole through them.
    252   for (auto i = layers.begin(); i != layers.end();) {
    253     // Skip layers above the z-order of the protected content
    254     if (i->first > static_cast<size_t>(protected_zorder)) {
    255       ++i;
    256       continue;
    257     }
    258 
    259     // If there's no precomp layer already queued, queue one now.
    260     DrmCompositionPlane *precomp = GetPrecomp(composition);
    261     if (precomp) {
    262       precomp->source_layers().emplace_back(i->first);
    263     } else {
    264       if (planes->size()) {
    265         DrmPlane *precomp_plane = planes->back();
    266         planes->pop_back();
    267         composition->emplace_back(DrmCompositionPlane::Type::kPrecomp,
    268                                   precomp_plane, crtc, i->first);
    269       } else {
    270         ALOGE("Not enough planes to reserve for precomp fb");
    271       }
    272     }
    273     i = layers.erase(i);
    274   }
    275   return 0;
    276 }
    277 
    278 bool PlanStageNvLimits::CheckLayer(DrmHwcLayer *layer) {
    279     auto src_w = layer->source_crop.width();
    280     auto src_h = layer->source_crop.height();
    281     auto dst_w = layer->display_frame.width();
    282     auto dst_h = layer->display_frame.height();
    283     int h_limit = 4;
    284     int v_limit;
    285 
    286     switch (layer->buffer->format) {
    287       case DRM_FORMAT_YVU420:
    288       case DRM_FORMAT_BGR565:
    289         v_limit = 4;
    290         break;
    291       default:
    292         v_limit = 2;
    293         break;
    294     }
    295 
    296     if (layer->transform &
    297         (DrmHwcTransform::kRotate90 | DrmHwcTransform::kRotate270))
    298       std::swap(dst_w, dst_h);
    299 
    300     // check for max supported down scaling
    301     if (((src_w / dst_w) > h_limit) || ((src_h / dst_h) > v_limit))
    302       return false;
    303 
    304     return true;
    305 }
    306 
    307 int PlanStageNvLimits::ProvisionPlanes(
    308     std::vector<DrmCompositionPlane> *composition,
    309     std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
    310     std::vector<DrmPlane *> *planes) {
    311   int ret;
    312 
    313   for (auto i = layers.begin(); i != layers.end();) {
    314     // Skip layer if supported
    315     if (CheckLayer(i->second)) {
    316       i++;
    317       continue;
    318     }
    319 
    320     if (i->second->protected_usage()) {
    321       // Drop the layer if unsupported and protected, this will just display
    322       // black in the area of this layer but it's better than failing miserably
    323       i = layers.erase(i);
    324       continue;
    325     }
    326 
    327     // If there's no precomp layer already queued, queue one now.
    328     DrmCompositionPlane *precomp = GetPrecomp(composition);
    329     if (precomp) {
    330       precomp->source_layers().emplace_back(i->first);
    331     } else if (!planes->empty()) {
    332       DrmPlane *precomp_plane = planes->back();
    333       planes->pop_back();
    334       composition->emplace_back(DrmCompositionPlane::Type::kPrecomp,
    335                                 precomp_plane, crtc, i->first);
    336     } else {
    337       ALOGE("Not enough planes to reserve for precomp fb");
    338     }
    339     i = layers.erase(i);
    340   }
    341 
    342   return 0;
    343 }
    344 }
    345