/*
 * Copyright (c) 2021 Advanced Micro Devices, Inc. All rights reserved.
 * 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.
 */

/*
 * Test to compare
 * 1.pciBusID from hipDeviceGetPCIBusId and hipDeviceGetAttribute **
 * 2.{pciDomainID, pciBusID, pciDeviceID} values hipDeviceGetPCIBusId vs lspci **
 */

#include <hip_test_common.hh>

/**
 * @addtogroup hipDeviceGetPCIBusId hipDeviceGetPCIBusId
 * @{
 * @ingroup DriverTest
 * `hipDeviceGetPCIBusId(char* pciBusId, int len, int device)` -
 * Returns a PCI Bus Id string for the device, overloaded to take int device ID.
 */

#define MAX_DEVICE_LENGTH 20

namespace hipDeviceGetPCIBusIdTests {

void getPciBusId(int deviceCount,
                 char **hipDeviceList) {
  for (int i = 0; i < deviceCount; i++) {
    HIP_CHECK(hipDeviceGetPCIBusId(hipDeviceList[i], MAX_DEVICE_LENGTH, i));
  }
}
}  // namespace hipDeviceGetPCIBusIdTests

/**
 * Test Description
 * ------------------------
 *  - Check that PCI bus ID is the same as the one returned from attributes.
 *  - Perform for each device.
 * Test source
 * ------------------------
 *  - unit/device/hipDeviceGetByPCIBusId.cc
 * Test requirements
 * ------------------------
 *  - HIP_VERSION >= 5.2
 */
TEST_CASE("Unit_hipDeviceGetPCIBusId_Check_PciBusID_WithAttr") {
  int deviceCount = 0;
  HIP_CHECK(hipGetDeviceCount(&deviceCount));
  REQUIRE_FALSE(deviceCount == 0);
  printf("No.of gpus in the system: %d\n", deviceCount);
  // Allocate an array of pointer to characters
  char **hipDeviceList = new char*[deviceCount];
  REQUIRE_FALSE(hipDeviceList == nullptr);
  for (int i = 0; i < deviceCount; i++) {
    hipDeviceList[i] = new char[MAX_DEVICE_LENGTH];
    REQUIRE_FALSE(hipDeviceList[i] == nullptr);
  }
  hipDeviceGetPCIBusIdTests::getPciBusId(deviceCount, hipDeviceList);

  for (int i = 0; i < deviceCount; i++) {
    int pciBusID = -1;
    int pciDeviceID = -1;
    int pciDomainID = -1;
    int tempPciBusId = -1;
    sscanf(hipDeviceList[i], "%04x:%02x:%02x", &pciDomainID, &pciBusID,
           &pciDeviceID);
    HIP_CHECK(hipDeviceGetAttribute(&tempPciBusId,
                                   hipDeviceAttributePciBusId, i));
    REQUIRE_FALSE(pciBusID != tempPciBusId);
  }
  // Deallocate
  for (int i = 0; i < deviceCount; i++) {
    delete hipDeviceList[i];
  }
  delete[] hipDeviceList;
  printf("pciBusID output of both hipDeviceGetPCIBusId and"
         " hipDeviceGetAttribute matched for all gpus\n");
}

/**
 * Test Description
 * ------------------------
 *  - Checks that an error is returned when the output buffer has length
 *    that is smaller than the full PCI bus ID.
 *      - Expected output: do not return `hipSuccess`
 * Test source
 * ------------------------
 *  - unit/device/hipDeviceGetPCIBusId.cc
 * Test requirements
 * ------------------------
 *  - HIP_VERSION >= 5.2
 */
TEST_CASE("Unit_hipDeviceGetPCIBusId_Negative_PartialFill") {
  std::array<char, MAX_DEVICE_LENGTH> busID;

  const int device = GENERATE(range(0, HipTest::getDeviceCount()));

  HIP_CHECK(hipDeviceGetPCIBusId(busID.data(), busID.size(), device));

  auto start = std::begin(busID);
  auto end = std::end(busID);
  const auto len = std::distance(start, std::find(start, end, 0));

  // fill up only half of the length
  const auto fillLen = len / 2;
  constexpr char fillValue = 1;
  std::fill(start, end, fillValue);

  REQUIRE_FALSE(hipDeviceGetPCIBusId(busID.data(), fillLen, device) == hipSuccess);

  const auto strEnd = start + fillLen - 1;
  REQUIRE(std::all_of(start, strEnd, [](char& c) { return c != 0; }));
  REQUIRE(*strEnd == 0);
  REQUIRE(std::all_of(strEnd+1, end, [](char& c) { return c == fillValue; }));
}

/**
 * Test Description
 * ------------------------
 *  - Validates handling of invalid arguments:
 *    -# When output pointer to the PCI bus ID is `nullptr`
 *      - Expected output: do not return `hipSuccess`
 *    -# When the length of the output buffer is 0
 *      - Expected output: do not return `hipSuccess`
 *    -# When the length of the output buffer is less than 0
 *      - Expected output: do not return `hipSuccess`
 *    -# When the device ordinal is negative (-1)
 *      - Expected output: do not return `hipSuccess`
 *    -# When the device ordinal is out of bounds
 *      - Expected output: do not return `hipSuccess`
 * Test source
 * ------------------------
 *  - unit/device/hipDeviceGetPCIBusId.cc
 * Test requirements
 * ------------------------
 *  - HIP_VERSION >= 5.2
 */
TEST_CASE("Unit_hipDeviceGetPCIBusId_NegTst") {
  char pciBusId[MAX_DEVICE_LENGTH];
  int device;
  HIP_CHECK(hipGetDevice(&device));

  // pciBusId is nullptr
  SECTION("pciBusId is nullptr") {
    REQUIRE_FALSE(hipDeviceGetPCIBusId(nullptr, MAX_DEVICE_LENGTH, device)
                  == hipSuccess);
  }

  // len = 0
  SECTION("len is 0") {
    REQUIRE_FALSE(hipDeviceGetPCIBusId(pciBusId, 0, device) == hipSuccess);
  }

  // len < 0
  SECTION("len is less than 0") {
    REQUIRE_FALSE(hipDeviceGetPCIBusId(pciBusId, -1, device) == hipSuccess);
  }

  // device = -1
  SECTION("device is -1") {
    REQUIRE_FALSE(hipDeviceGetPCIBusId(pciBusId, MAX_DEVICE_LENGTH, -1)
                  == hipSuccess);
  }
  // device = Non Existing Device
  SECTION("device is out of bounds") {
    int deviceCount = 0;
    HIP_CHECK(hipGetDeviceCount(&deviceCount));
    REQUIRE_FALSE(deviceCount == 0);
    REQUIRE_FALSE(hipDeviceGetPCIBusId(pciBusId, MAX_DEVICE_LENGTH,
                  deviceCount) == hipSuccess);
  }
}
