meta-rcar-gen3/recipes-kernel/kernel-module-mmngr/mmngr_drv.inc


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LICENSE = "GPLv2 & MIT"
LIC_FILES_CHKSUM = " \
    file://GPL-COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \
    file://MIT-COPYING;md5=192063521ce782a445a3c9f99a8ad560 \
"

require include/rcar-gen3-modules-common.inc
inherit module

MMNGR_DRV_URI = "git://github.com/renesas-rcar/mmngr_drv.git"

SRC_URI = "${MMNGR_DRV_URI};branch=rcar_gen3"
SRCREV = "5757985acb1947811257ecb40cc70711d917b2a2"
/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <unistd.h>
#include <algorithm>
#include <mutex>
#include <json.h>
#include <json.hpp>
#include "app.hpp"
#include "result.hpp"
#include "json_helper.hpp"
#include "util.hpp"
#include "wayland_ivi_wm.hpp"

extern "C" {
#include <afb/afb-binding.h>
#include <systemd/sd-event.h>
}

typedef struct wmClientCtxt{
    std::string name;
    wmClientCtxt(const char* appName){
        name = appName;
    }
} wmClientCtxt;

struct afb_instance {
   std::unique_ptr<wl::display> display;
   wm::App app;

   afb_instance() : display{new wl::display}, app{this->display.get()} {}

   int init();
};

struct afb_instance *g_afb_instance;
std::mutex binding_m;

int afb_instance::init() {
   return this->app.init();
}

int display_event_callback(sd_event_source *evs, int /*fd*/, uint32_t events,
                           void * /*data*/) {
   ST();

   if ((events & EPOLLHUP) != 0) {
      HMI_ERROR("wm", "The compositor hung up, dying now.");
      delete g_afb_instance;
      g_afb_instance = nullptr;
      goto error;
   }

   if ((events & EPOLLIN) != 0u) {
      {
         STN(display_read_events);
         g_afb_instance->app.display->read_events();
         g_afb_instance->app.set_pending_events();
      }
      {
         // We want do dispatch pending wayland events from within
         // the API context
         STN(winman_ping_api_call);
         afb_service_call("windowmanager", "ping", json_object_new_object(),
                          [](void *c, int st, json_object *j) {
                             STN(winman_ping_api_call_return);
                          },
                          nullptr);
      }
   }

   return 0;

error:
   sd_event_source_unref(evs);
   if (getenv("WINMAN_EXIT_ON_HANGUP") != nullptr) {
   exit(1);
}
   return -1;
}

int _binding_init() {
   HMI_NOTICE("wm", "WinMan ver. %s", WINMAN_VERSION_STRING);

   if (g_afb_instance != nullptr) {
      HMI_ERROR("wm", "Wayland context already initialized?");
      return 0;
   }

   if (getenv("XDG_RUNTIME_DIR") == nullptr) {
      HMI_ERROR("wm", "Environment variable XDG_RUNTIME_DIR not set");
      goto error;
   }

   {
      // wait until wayland compositor starts up.
      int cnt = 0;
      g_afb_instance = new afb_instance;
      while (!g_afb_instance->display->ok()) {
         cnt++;
         if (20 <= cnt) {
            HMI_ERROR("wm", "Could not connect to compositor");
            goto error;
         }
         HMI_ERROR("wm", "Wait to start weston ...");
         sleep(1);
         delete g_afb_instance;
         g_afb_instance = new afb_instance;
      }
   }

   if (g_afb_instance->init() == -1) {
      HMI_ERROR("wm", "Could not connect to compositor");
      goto error;
   }

   {
      int ret = sd_event_add_io(afb_daemon_get_event_loop(), nullptr,
                                g_afb_instance->display->get_fd(), EPOLLIN,
                                display_event_callback, g_afb_instance);
      if (ret < 0) {
         HMI_ERROR("wm", "Could not initialize afb_instance event handler: %d", -ret);
         goto error;
      }
   }

   atexit([] { delete g_afb_instance; });

   return 0;

error:
   delete g_afb_instance;
   g_afb_instance = nullptr;
   return -1;
}

int binding_init() noexcept {
   try {
      return _binding_init();
   } catch (std::exception &e) {
      HMI_ERROR("wm", "Uncaught exception in binding_init(): %s", e.what());
   }
   return -1;
}

static bool checkFirstReq(afb_req req){
    wmClientCtxt* ctxt = (wmClientCtxt*)afb_req_context_get(req);
    return (ctxt) ? false : true;
}

static void cbRemoveClientCtxt(void* data){
    wmClientCtxt* ctxt = (wmClientCtxt*)data;
    if(ctxt == nullptr){
        return;
    }
    HMI_DEBUG("wm","remove app %s", ctxt->name.c_str());
    // Lookup surfaceID and remove it because App is dead.
    auto pSid = g_afb_instance->app.id_alloc.lookup(ctxt->name.c_str());
    if(pSid){
        auto sid = *pSid;
        g_afb_instance->app.id_alloc.remove_id(sid);
        g_afb_instance->app.layers.remove_surface(sid);
        g_afb_instance->app.controller->sprops.erase(sid);
        g_afb_instance->app.controller->surfaces.erase(sid);
        HMI_DEBUG("wm", "delete surfaceID %d", sid);
    }
    delete ctxt;
}

void windowmanager_requestsurface(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   const char* a_drawing_name = afb_req_value(req, "drawing_name");
   if(!a_drawing_name){
       afb_req_fail(req, "failed", "Need char const* argument drawing_name");
       return;
   }

   /* Create Security Context */
   bool isFirstReq = checkFirstReq(req);
   if(!isFirstReq){
       wmClientCtxt* ctxt = (wmClientCtxt*)afb_req_context_get(req);
       HMI_DEBUG("wm", "You're %s.", ctxt->name.c_str());
       if(ctxt->name != std::string(a_drawing_name)){
           afb_req_fail_f(req, "failed", "Dont request with other name: %s for now", a_drawing_name);
           HMI_DEBUG("wm", "Don't request with other name: %s for now", a_drawing_name);
           return;
       }
   }

   auto ret = g_afb_instance->app.api_request_surface(a_drawing_name);

   if(isFirstReq){
       wmClientCtxt* ctxt = new wmClientCtxt(a_drawing_name);
       HMI_DEBUG("wm", "create session for %s", ctxt->name.c_str());
       afb_req_session_set_LOA(req, 1);
       afb_req_context_set(req, ctxt, cbRemoveClientCtxt);
   }
   else{
       HMI_DEBUG("wm", "session already created for %s", a_drawing_name);
   }

   if (ret.is_err()) {
      afb_req_fail(req, "failed", ret.unwrap_err());
      return;
   }

   afb_req_success(req, json_object_new_int(ret.unwrap()), "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling requestsurface: %s", e.what());
      return;
   }

}

void windowmanager_requestsurfacexdg(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   json_object *jreq = afb_req_json(req);

   json_object *j_drawing_name = nullptr;
   if (! json_object_object_get_ex(jreq, "drawing_name", &j_drawing_name)) {
      afb_req_fail(req, "failed", "Need char const* argument drawing_name");
      return;
   }
   char const* a_drawing_name = json_object_get_string(j_drawing_name);

   json_object *j_ivi_id = nullptr;
   if (! json_object_object_get_ex(jreq, "ivi_id", &j_ivi_id)) {
      afb_req_fail(req, "failed", "Need char const* argument ivi_id");
      return;
   }
   char const* a_ivi_id = json_object_get_string(j_ivi_id);

   auto ret = g_afb_instance->app.api_request_surface(a_drawing_name, a_ivi_id);
   if (ret != nullptr) {
      afb_req_fail(req, "failed", ret);
      return;
   }

   afb_req_success(req, NULL, "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling requestsurfacexdg: %s", e.what());
      return;
   }
}

void windowmanager_activatesurface(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   const char* a_drawing_name = afb_req_value(req, "drawing_name");
   if(!a_drawing_name){
       afb_req_fail(req, "failed", "Need char const* argument drawing_name");
       return;
   }

   const char* a_drawing_area = afb_req_value(req, "drawing_area");
   if(!a_drawing_area){
       afb_req_fail(req, "failed", "Need char const* argument drawing_area");
       return;
   }

   auto ret = g_afb_instance->app.api_activate_surface(a_drawing_name, a_drawing_area);
   if (ret != nullptr) {
      afb_req_fail(req, "failed", ret);
      return;
   }

   afb_req_success(req, NULL, "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling activatesurface: %s", e.what());
      return;
   }

}

void windowmanager_deactivatesurface(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   const char* a_drawing_name = afb_req_value(req, "drawing_name");
   if(!a_drawing_name){
       afb_req_fail(req, "failed", "Need char const* argument drawing_name");
       return;
   }

   auto ret = g_afb_instance->app.api_deactivate_surface(a_drawing_name);
   if (ret != nullptr) {
      afb_req_fail(req, "failed", ret);
      return;
   }

   afb_req_success(req, NULL, "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling deactivatesurface: %s", e.what());
      return;
   }
}

void windowmanager_enddraw(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   const char* a_drawing_name = afb_req_value(req, "drawing_name");
   if(!a_drawing_name){
       afb_req_fail(req, "failed", "Need char const* argument drawing_name");
       return;
   }

   auto ret = g_afb_instance->app.api_enddraw(a_drawing_name);
   if (ret != nullptr) {
      afb_req_fail(req, "failed", ret);
      return;
   }

   afb_req_success(req, NULL, "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling enddraw: %s", e.what());
      return;
   }

}

void windowmanager_getdisplayinfo_thunk(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   auto ret = g_afb_instance->app.api_get_display_info();
   if (ret.is_err()) {
      afb_req_fail(req, "failed", ret.unwrap_err());
      return;
   }

   afb_req_success(req, ret.unwrap(), "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling getdisplayinfo: %s", e.what());
      return;
   }

}

void windowmanager_getareainfo_thunk(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   json_object *jreq = afb_req_json(req);

   json_object *j_drawing_name = nullptr;
   if (! json_object_object_get_ex(jreq, "drawing_name", &j_drawing_name)) {
      afb_req_fail(req, "failed", "Need char const* argument drawing_name");
      return;
   }
   char const* a_drawing_name = json_object_get_string(j_drawing_name);

   auto ret = g_afb_instance->app.api_get_area_info(a_drawing_name);
   if (ret.is_err()) {
      afb_req_fail(req, "failed", ret.unwrap_err());
      return;
   }

   afb_req_success(req, ret.unwrap(), "success");
   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling getareainfo: %s", e.what());
      return;
   }

}

void windowmanager_wm_subscribe(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   json_object *jreq = afb_req_json(req);
   json_object *j = nullptr;
   if (! json_object_object_get_ex(jreq, "event", &j)) {
      afb_req_fail(req, "failed", "Need char const* argument event");
      return;
   }
   int event_type = json_object_get_int(j);
   const char *event_name = g_afb_instance->app.kListEventName[event_type];
   struct afb_event event = g_afb_instance->app.map_afb_event[event_name];
   int ret = afb_req_subscribe(req, event);
   if (ret) {
      afb_req_fail(req, "failed", "Error: afb_req_subscribe()");
      return;
   }
   afb_req_success(req, NULL, "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling wm_subscribe: %s", e.what());
      return;
   }

}

void windowmanager_list_drawing_names(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {

   nlohmann::json j = g_afb_instance->app.id_alloc.name2id;
   auto ret = wm::Ok(json_tokener_parse(j.dump().c_str()));
   if (ret.is_err()) {
      afb_req_fail(req, "failed", ret.unwrap_err());
      return;
   }

   afb_req_success(req, ret.unwrap(), "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling list_drawing_names: %s", e.what());
      return;
   }

}

void windowmanager_ping(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {

   g_afb_instance->app.api_ping();

   afb_req_success(req, NULL, "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling ping: %s", e.what());
      return;
   }
}

void windowmanager_debug_status(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {

   json_object *jr = json_object_new_object();
   json_object_object_add(jr, "surfaces",
                          to_json(g_afb_instance->app.controller->sprops));
   json_object_object_add(jr, "layers", to_json(g_afb_instance->app.controller->lprops));

   afb_req_success(req, jr, "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_status: %s", e.what());
      return;
   }
}

void windowmanager_debug_layers(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {
   auto ret = wm::Ok(json_tokener_parse(g_afb_instance->app.layers.to_json().dump().c_str()));

   afb_req_success(req, ret, "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_layers: %s", e.what());
      return;
   }
}

void windowmanager_debug_surfaces(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {

   auto ret = wm::Ok(to_json(g_afb_instance->app.controller->sprops));
   if (ret.is_err()) {
      afb_req_fail(req, "failed", ret.unwrap_err());
      return;
   }

   afb_req_success(req, ret.unwrap(), "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_surfaces: %s", e.what());
      return;
   }

}

void windowmanager_debug_terminate(afb_req req) noexcept {
   std::lock_guard<std::mutex> guard(binding_m);
   #ifdef ST
   ST();
   #endif
   if (g_afb_instance == nullptr) {
      afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
      return;
   }

   try {

   if (getenv("WINMAN_DEBUG_TERMINATE") != nullptr) {
      raise(SIGKILL);  // afb-daemon kills it's pgroup using TERM, which
                       // doesn't play well with perf
   }

   afb_req_success(req, NULL, "success");

   } catch (std::exception &e) {
      afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_terminate: %s", e.what());
      return;
   }

}

const struct afb_verb_v2 windowmanager_verbs[] = {
   { "requestsurface", windowmanager_requestsurface, nullptr, nullptr, AFB_SESSION_NONE },
   { "requestsurfacexdg", windowmanager_requestsurfacexdg, nullptr, nullptr, AFB_SESSION_NONE },
   { "activatesurface", windowmanager_activatesurface, nullptr, nullptr, AFB_SESSION_NONE },
   { "deactivatesurface", windowmanager_deactivatesurface, nullptr, nullptr, AFB_SESSION_NONE },
   { "enddraw", windowmanager_enddraw, nullptr, nullptr, AFB_SESSION_NONE },
   { "getdisplayinfo", windowmanager_getdisplayinfo_thunk, nullptr, nullptr, AFB_SESSION_NONE },
   { "getareainfo", windowmanager_getareainfo_thunk, nullptr, nullptr, AFB_SESSION_NONE },
   { "wm_subscribe", windowmanager_wm_subscribe, nullptr, nullptr, AFB_SESSION_NONE },
   { "list_drawing_names", windowmanager_list_drawing_names, nullptr, nullptr, AFB_SESSION_NONE },
   { "ping", windowmanager_ping, nullptr, nullptr, AFB_SESSION_NONE },
   { "debug_status", windowmanager_debug_status, nullptr, nullptr, AFB_SESSION_NONE },
   { "debug_layers", windowmanager_debug_layers, nullptr, nullptr, AFB_SESSION_NONE },
   { "debug_surfaces", windowmanager_debug_surfaces, nullptr, nullptr, AFB_SESSION_NONE },
   { "debug_terminate", windowmanager_debug_terminate, nullptr, nullptr, AFB_SESSION_NONE },
   {}
};

extern "C" const struct afb_binding_v2 afbBindingV2 = {
   "windowmanager", nullptr, nullptr, windowmanager_verbs, nullptr, binding_init, nullptr, 0};