//
// Copyright 2012 Francisco Jerez
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//

#include <unordered_map>

#include "api/dispatch.hpp"
#include "api/util.hpp"
#include "core/platform.hpp"
#include "git_sha1.h"
#include "util/u_debug.h"

using namespace clover;

namespace {
   platform _clover_platform;
}

CLOVER_API cl_int
clGetPlatformIDs(cl_uint num_entries, cl_platform_id *rd_platforms,
                 cl_uint *rnum_platforms) {
   if ((!num_entries && rd_platforms) ||
       (!rnum_platforms && !rd_platforms))
      return CL_INVALID_VALUE;

   if (rnum_platforms)
      *rnum_platforms = 1;
   if (rd_platforms)
      *rd_platforms = desc(_clover_platform);

   return CL_SUCCESS;
}

platform &clover::find_platform(cl_platform_id d_platform)
{
   /* this error is only added in CL2.0 */
   if (d_platform != desc(_clover_platform))
      throw error(CL_INVALID_PLATFORM);
   return obj(d_platform);
}

cl_int
clover::GetPlatformInfo(cl_platform_id d_platform, cl_platform_info param,
                        size_t size, void *r_buf, size_t *r_size) try {
   property_buffer buf { r_buf, size, r_size };

   auto &platform = find_platform(d_platform);

   switch (param) {
   case CL_PLATFORM_PROFILE:
      buf.as_string() = "FULL_PROFILE";
      break;

   case CL_PLATFORM_VERSION: {
      buf.as_string() = "OpenCL " + platform.platform_version_as_string() + " Mesa " PACKAGE_VERSION MESA_GIT_SHA1;
      break;
   }
   case CL_PLATFORM_NAME:
      buf.as_string() = "Clover";
      break;

   case CL_PLATFORM_VENDOR:
      buf.as_string() = "Mesa";
      break;

   case CL_PLATFORM_EXTENSIONS:
      buf.as_string() = platform.supported_extensions_as_string();
      break;

   case CL_PLATFORM_ICD_SUFFIX_KHR:
      buf.as_string() = "MESA";
      break;

   case CL_PLATFORM_NUMERIC_VERSION: {
      buf.as_scalar<cl_version>() = platform.platform_version();
      break;
   }

   case CL_PLATFORM_EXTENSIONS_WITH_VERSION:
      buf.as_vector<cl_name_version>() = platform.supported_extensions();
      break;

   case CL_PLATFORM_HOST_TIMER_RESOLUTION:
      buf.as_scalar<cl_ulong>() = 0;
      break;

   default:
      throw error(CL_INVALID_VALUE);
   }

   return CL_SUCCESS;

} catch (error &e) {
   return e.get();
}

void *
clover::GetExtensionFunctionAddressForPlatform(cl_platform_id d_platform,
                                               const char *p_name) try {
   obj(d_platform);
   return GetExtensionFunctionAddress(p_name);

} catch (error &) {
   return NULL;
}

namespace {

cl_int
enqueueSVMFreeARM(cl_command_queue command_queue,
                  cl_uint num_svm_pointers,
                  void *svm_pointers[],
                  void (CL_CALLBACK *pfn_free_func) (
                    cl_command_queue queue, cl_uint num_svm_pointers,
                    void *svm_pointers[], void *user_data),
                  void *user_data,
                  cl_uint num_events_in_wait_list,
                  const cl_event *event_wait_list,
                  cl_event *event) {

   return EnqueueSVMFree(command_queue, num_svm_pointers, svm_pointers,
                         pfn_free_func, user_data, num_events_in_wait_list,
                         event_wait_list, event, CL_COMMAND_SVM_FREE_ARM);
}

cl_int
enqueueSVMMapARM(cl_command_queue command_queue,
                 cl_bool blocking_map,
                 cl_map_flags map_flags,
                 void *svm_ptr,
                 size_t size,
                 cl_uint num_events_in_wait_list,
                 const cl_event *event_wait_list,
                 cl_event *event) {

   return EnqueueSVMMap(command_queue, blocking_map, map_flags, svm_ptr, size,
                        num_events_in_wait_list, event_wait_list, event,
                        CL_COMMAND_SVM_MAP_ARM);
}

cl_int
enqueueSVMMemcpyARM(cl_command_queue command_queue,
                    cl_bool blocking_copy,
                    void *dst_ptr,
                    const void *src_ptr,
                    size_t size,
                    cl_uint num_events_in_wait_list,
                    const cl_event *event_wait_list,
                    cl_event *event) {

   return EnqueueSVMMemcpy(command_queue, blocking_copy, dst_ptr, src_ptr,
                           size, num_events_in_wait_list, event_wait_list,
                           event, CL_COMMAND_SVM_MEMCPY_ARM);
}

cl_int
enqueueSVMMemFillARM(cl_command_queue command_queue,
                     void *svm_ptr,
                     const void *pattern,
                     size_t pattern_size,
                     size_t size,
                     cl_uint num_events_in_wait_list,
                     const cl_event *event_wait_list,
                     cl_event *event) {

   return EnqueueSVMMemFill(command_queue, svm_ptr, pattern, pattern_size,
                            size, num_events_in_wait_list, event_wait_list,
                            event, CL_COMMAND_SVM_MEMFILL_ARM);
}

cl_int
enqueueSVMUnmapARM(cl_command_queue command_queue,
                   void *svm_ptr,
                   cl_uint num_events_in_wait_list,
                   const cl_event *event_wait_list,
                   cl_event *event) {

   return EnqueueSVMUnmap(command_queue, svm_ptr, num_events_in_wait_list,
                          event_wait_list, event, CL_COMMAND_SVM_UNMAP_ARM);
}

const std::unordered_map<std::string, void *>
ext_funcs = {
   // cl_arm_shared_virtual_memory
   { "clEnqueueSVMFreeARM", reinterpret_cast<void *>(enqueueSVMFreeARM) },
   { "clEnqueueSVMMapARM", reinterpret_cast<void *>(enqueueSVMMapARM) },
   { "clEnqueueSVMMemcpyARM", reinterpret_cast<void *>(enqueueSVMMemcpyARM) },
   { "clEnqueueSVMMemFillARM", reinterpret_cast<void *>(enqueueSVMMemFillARM) },
   { "clEnqueueSVMUnmapARM", reinterpret_cast<void *>(enqueueSVMUnmapARM) },
   { "clSetKernelArgSVMPointerARM", reinterpret_cast<void *>(clSetKernelArgSVMPointer) },
   { "clSetKernelExecInfoARM", reinterpret_cast<void *>(clSetKernelExecInfo) },
   { "clSVMAllocARM", reinterpret_cast<void *>(clSVMAlloc) },
   { "clSVMFreeARM", reinterpret_cast<void *>(clSVMFree) },

   // cl_khr_icd
   { "clIcdGetPlatformIDsKHR", reinterpret_cast<void *>(IcdGetPlatformIDsKHR) },

   // cl_khr_il_program
   { "clCreateProgramWithILKHR", reinterpret_cast<void *>(CreateProgramWithILKHR) },
};

} // anonymous namespace

void *
clover::GetExtensionFunctionAddress(const char *p_name) try {
   return ext_funcs.at(p_name);
} catch (...) {
   return nullptr;
}

cl_int
clover::IcdGetPlatformIDsKHR(cl_uint num_entries, cl_platform_id *rd_platforms,
                             cl_uint *rnum_platforms) {
   return clGetPlatformIDs(num_entries, rd_platforms, rnum_platforms);
}

CLOVER_ICD_API cl_int
clGetPlatformInfo(cl_platform_id d_platform, cl_platform_info param,
                  size_t size, void *r_buf, size_t *r_size) {
   return GetPlatformInfo(d_platform, param, size, r_buf, r_size);
}

CLOVER_ICD_API void *
clGetExtensionFunctionAddress(const char *p_name) {
   return GetExtensionFunctionAddress(p_name);
}

CLOVER_ICD_API void *
clGetExtensionFunctionAddressForPlatform(cl_platform_id d_platform,
                                         const char *p_name) {
   return GetExtensionFunctionAddressForPlatform(d_platform, p_name);
}

CLOVER_ICD_API cl_int
clIcdGetPlatformIDsKHR(cl_uint num_entries, cl_platform_id *rd_platforms,
                       cl_uint *rnum_platforms) {
   return IcdGetPlatformIDsKHR(num_entries, rd_platforms, rnum_platforms);
}