/*
 * Copyright © 2017, Google Inc.
 *
 * 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 (including the next
 * paragraph) 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 "tu_private.h"

#include <hardware/gralloc.h>
#include <hardware/hardware.h>
#include <hardware/hwvulkan.h>
#include <libsync.h>

#include <vulkan/vk_android_native_buffer.h>
#include <vulkan/vk_icd.h>

#include "drm-uapi/drm_fourcc.h"

#include "util/os_file.h"

static int
tu_hal_open(const struct hw_module_t *mod,
            const char *id,
            struct hw_device_t **dev);
static int
tu_hal_close(struct hw_device_t *dev);

static void UNUSED
static_asserts(void)
{
   STATIC_ASSERT(HWVULKAN_DISPATCH_MAGIC == ICD_LOADER_MAGIC);
}

PUBLIC struct hwvulkan_module_t HAL_MODULE_INFO_SYM = {
   .common =
     {
       .tag = HARDWARE_MODULE_TAG,
       .module_api_version = HWVULKAN_MODULE_API_VERSION_0_1,
       .hal_api_version = HARDWARE_MAKE_API_VERSION(1, 0),
       .id = HWVULKAN_HARDWARE_MODULE_ID,
       .name = "AMD Vulkan HAL",
       .author = "Google",
       .methods =
         &(hw_module_methods_t){
           .open = tu_hal_open,
         },
     },
};

/* If any bits in test_mask are set, then unset them and return true. */
static inline bool
unmask32(uint32_t *inout_mask, uint32_t test_mask)
{
   uint32_t orig_mask = *inout_mask;
   *inout_mask &= ~test_mask;
   return *inout_mask != orig_mask;
}

static int
tu_hal_open(const struct hw_module_t *mod,
            const char *id,
            struct hw_device_t **dev)
{
   assert(mod == &HAL_MODULE_INFO_SYM.common);
   assert(strcmp(id, HWVULKAN_DEVICE_0) == 0);

   hwvulkan_device_t *hal_dev = malloc(sizeof(*hal_dev));
   if (!hal_dev)
      return -1;

   *hal_dev = (hwvulkan_device_t){
      .common =
        {
          .tag = HARDWARE_DEVICE_TAG,
          .version = HWVULKAN_DEVICE_API_VERSION_0_1,
          .module = &HAL_MODULE_INFO_SYM.common,
          .close = tu_hal_close,
        },
      .EnumerateInstanceExtensionProperties =
        tu_EnumerateInstanceExtensionProperties,
      .CreateInstance = tu_CreateInstance,
      .GetInstanceProcAddr = tu_GetInstanceProcAddr,
   };

   *dev = &hal_dev->common;
   return 0;
}

static int
tu_hal_close(struct hw_device_t *dev)
{
   /* hwvulkan.h claims that hw_device_t::close() is never called. */
   return -1;
}

VkResult
tu_image_from_gralloc(VkDevice device_h,
                      const VkImageCreateInfo *base_info,
                      const VkNativeBufferANDROID *gralloc_info,
                      const VkAllocationCallbacks *alloc,
                      VkImage *out_image_h)

{
   TU_FROM_HANDLE(tu_device, device, device_h);
   VkImage image_h = VK_NULL_HANDLE;
   struct tu_image *image = NULL;
   VkResult result;

   result = tu_image_create(device_h, base_info, alloc, &image_h,
                            DRM_FORMAT_MOD_LINEAR, NULL);
   if (result != VK_SUCCESS)
      return result;

   if (gralloc_info->handle->numFds != 1) {
      return vk_errorf(device->instance, VK_ERROR_INVALID_EXTERNAL_HANDLE,
                       "VkNativeBufferANDROID::handle::numFds is %d, "
                       "expected 1",
                       gralloc_info->handle->numFds);
   }

   /* Do not close the gralloc handle's dma_buf. The lifetime of the dma_buf
    * must exceed that of the gralloc handle, and we do not own the gralloc
    * handle.
    */
   int dma_buf = gralloc_info->handle->data[0];

   image = tu_image_from_handle(image_h);

   VkDeviceMemory memory_h;

   const VkMemoryDedicatedAllocateInfo ded_alloc = {
      .sType = VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO,
      .pNext = NULL,
      .buffer = VK_NULL_HANDLE,
      .image = image_h
   };

   const VkImportMemoryFdInfoKHR import_info = {
      .sType = VK_STRUCTURE_TYPE_IMPORT_MEMORY_FD_INFO_KHR,
      .pNext = &ded_alloc,
      .handleType = VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT,
      .fd = os_dupfd_cloexec(dma_buf),
   };

   result =
      tu_AllocateMemory(device_h,
                        &(VkMemoryAllocateInfo) {
                           .sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
                           .pNext = &import_info,
                           .allocationSize = image->layout.size,
                           .memoryTypeIndex = 0,
                        },
                        alloc, &memory_h);
   if (result != VK_SUCCESS)
      goto fail_create_image;

   tu_BindImageMemory(device_h, image_h, memory_h, 0);

   image->owned_memory = memory_h;
   /* Don't clobber the out-parameter until success is certain. */
   *out_image_h = image_h;

   return VK_SUCCESS;

fail_create_image:
   tu_DestroyImage(device_h, image_h, alloc);

   return result;
}

VkResult
tu_GetSwapchainGrallocUsageANDROID(VkDevice device_h,
                                   VkFormat format,
                                   VkImageUsageFlags imageUsage,
                                   int *grallocUsage)
{
   TU_FROM_HANDLE(tu_device, device, device_h);
   struct tu_physical_device *phys_dev = device->physical_device;
   VkPhysicalDevice phys_dev_h = tu_physical_device_to_handle(phys_dev);
   VkResult result;

   *grallocUsage = 0;

   /* WARNING: Android Nougat's libvulkan.so hardcodes the VkImageUsageFlags
    * returned to applications via
    * VkSurfaceCapabilitiesKHR::supportedUsageFlags.
    * The relevant code in libvulkan/swapchain.cpp contains this fun comment:
    *
    *     TODO(jessehall): I think these are right, but haven't thought hard
    *     about it. Do we need to query the driver for support of any of
    *     these?
    *
    * Any disagreement between this function and the hardcoded
    * VkSurfaceCapabilitiesKHR:supportedUsageFlags causes tests
    * dEQP-VK.wsi.android.swapchain.*.image_usage to fail.
    */

   const VkPhysicalDeviceImageFormatInfo2 image_format_info = {
      .sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2,
      .format = format,
      .type = VK_IMAGE_TYPE_2D,
      .tiling = VK_IMAGE_TILING_OPTIMAL,
      .usage = imageUsage,
   };

   VkImageFormatProperties2 image_format_props = {
      .sType = VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2,
   };

   /* Check that requested format and usage are supported. */
   result = tu_GetPhysicalDeviceImageFormatProperties2(
      phys_dev_h, &image_format_info, &image_format_props);
   if (result != VK_SUCCESS) {
      return vk_errorf(device->instance, result,
                       "tu_GetPhysicalDeviceImageFormatProperties2 failed "
                       "inside %s",
                       __func__);
   }

   if (unmask32(&imageUsage, VK_IMAGE_USAGE_TRANSFER_DST_BIT |
                                VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT))
      *grallocUsage |= GRALLOC_USAGE_HW_RENDER;

   if (unmask32(&imageUsage, VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
                                VK_IMAGE_USAGE_SAMPLED_BIT |
                                VK_IMAGE_USAGE_STORAGE_BIT |
                                VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT))
      *grallocUsage |= GRALLOC_USAGE_HW_TEXTURE;

   /* All VkImageUsageFlags not explicitly checked here are unsupported for
    * gralloc swapchains.
    */
   if (imageUsage != 0) {
      return vk_errorf(device->instance, VK_ERROR_FORMAT_NOT_SUPPORTED,
                       "unsupported VkImageUsageFlags(0x%x) for gralloc "
                       "swapchain",
                       imageUsage);
   }

   /*
    * FINISHME: Advertise all display-supported formats. Mostly
    * DRM_FORMAT_ARGB2101010 and DRM_FORMAT_ABGR2101010, but need to check
    * what we need for 30-bit colors.
    */
   if (format == VK_FORMAT_B8G8R8A8_UNORM ||
       format == VK_FORMAT_B5G6R5_UNORM_PACK16) {
      *grallocUsage |= GRALLOC_USAGE_HW_FB | GRALLOC_USAGE_HW_COMPOSER |
                       GRALLOC_USAGE_EXTERNAL_DISP;
   }

   if (*grallocUsage == 0)
      return VK_ERROR_FORMAT_NOT_SUPPORTED;

   return VK_SUCCESS;
}

VkResult
tu_GetSwapchainGrallocUsage2ANDROID(VkDevice device,
                                    VkFormat format,
                                    VkImageUsageFlags imageUsage,
                                    VkSwapchainImageUsageFlagsANDROID swapchainImageUsage,
                                    uint64_t *grallocConsumerUsage,
                                    uint64_t *grallocProducerUsage)
{
   tu_stub();

   return VK_SUCCESS;
}

VkResult
tu_AcquireImageANDROID(VkDevice device,
                       VkImage image_h,
                       int nativeFenceFd,
                       VkSemaphore semaphore,
                       VkFence fence)
{
   VkResult semaphore_result = VK_SUCCESS, fence_result = VK_SUCCESS;

   if (semaphore != VK_NULL_HANDLE) {
      int semaphore_fd =
         nativeFenceFd >= 0 ? os_dupfd_cloexec(nativeFenceFd) : nativeFenceFd;
      semaphore_result = tu_ImportSemaphoreFdKHR(
         device, &(VkImportSemaphoreFdInfoKHR) {
                    .sType = VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_FD_INFO_KHR,
                    .flags = VK_SEMAPHORE_IMPORT_TEMPORARY_BIT,
                    .fd = semaphore_fd,
                    .semaphore = semaphore,
                 });
   }

   if (fence != VK_NULL_HANDLE) {
      int fence_fd = nativeFenceFd >= 0 ? os_dupfd_cloexec(nativeFenceFd) : nativeFenceFd;
      fence_result = tu_ImportFenceFdKHR(
         device, &(VkImportFenceFdInfoKHR) {
                    .sType = VK_STRUCTURE_TYPE_IMPORT_FENCE_FD_INFO_KHR,
                    .flags = VK_FENCE_IMPORT_TEMPORARY_BIT,
                    .fd = fence_fd,
                    .fence = fence,
                 });
   }

   close(nativeFenceFd);

   if (semaphore_result != VK_SUCCESS)
      return semaphore_result;
   return fence_result;
}

VkResult
tu_QueueSignalReleaseImageANDROID(VkQueue _queue,
                                  uint32_t waitSemaphoreCount,
                                  const VkSemaphore *pWaitSemaphores,
                                  VkImage image,
                                  int *pNativeFenceFd)
{
   TU_FROM_HANDLE(tu_queue, queue, _queue);
   VkResult result = VK_SUCCESS;

   if (waitSemaphoreCount == 0) {
      if (pNativeFenceFd)
         *pNativeFenceFd = -1;
      return VK_SUCCESS;
   }

   int fd = -1;

   for (uint32_t i = 0; i < waitSemaphoreCount; ++i) {
      int tmp_fd;
      result = tu_GetSemaphoreFdKHR(
         tu_device_to_handle(queue->device),
         &(VkSemaphoreGetFdInfoKHR) {
            .sType = VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR,
            .handleType = VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT,
            .semaphore = pWaitSemaphores[i],
         },
         &tmp_fd);
      if (result != VK_SUCCESS) {
         if (fd >= 0)
            close(fd);
         return result;
      }

      if (fd < 0)
         fd = tmp_fd;
      else if (tmp_fd >= 0) {
         sync_accumulate("tu", &fd, tmp_fd);
         close(tmp_fd);
      }
   }

   if (pNativeFenceFd) {
      *pNativeFenceFd = fd;
   } else if (fd >= 0) {
      close(fd);
      /* We still need to do the exports, to reset the semaphores, but
       * otherwise we don't wait on them. */
   }
   return VK_SUCCESS;
}