/*
 * Copyright © 2015 Intel Corporation
 *
 * 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 "anv_private.h"
#include "wsi_common.h"
#include "vk_format_info.h"
#include "util/vk_util.h"

#ifdef VK_USE_PLATFORM_WAYLAND_KHR
static const struct wsi_callbacks wsi_cbs = {
   .get_phys_device_format_properties = anv_GetPhysicalDeviceFormatProperties,
};
#endif

VkResult
anv_init_wsi(struct anv_physical_device *physical_device)
{
   VkResult result;

   memset(physical_device->wsi_device.wsi, 0, sizeof(physical_device->wsi_device.wsi));

#ifdef VK_USE_PLATFORM_XCB_KHR
   result = wsi_x11_init_wsi(&physical_device->wsi_device, &physical_device->instance->alloc);
   if (result != VK_SUCCESS)
      return result;
#endif

#ifdef VK_USE_PLATFORM_WAYLAND_KHR
   result = wsi_wl_init_wsi(&physical_device->wsi_device, &physical_device->instance->alloc,
                            anv_physical_device_to_handle(physical_device),
                            &wsi_cbs);
   if (result != VK_SUCCESS) {
#ifdef VK_USE_PLATFORM_XCB_KHR
      wsi_x11_finish_wsi(&physical_device->wsi_device, &physical_device->instance->alloc);
#endif
      return result;
   }
#endif

   return VK_SUCCESS;
}

void
anv_finish_wsi(struct anv_physical_device *physical_device)
{
#ifdef VK_USE_PLATFORM_WAYLAND_KHR
   wsi_wl_finish_wsi(&physical_device->wsi_device, &physical_device->instance->alloc);
#endif
#ifdef VK_USE_PLATFORM_XCB_KHR
   wsi_x11_finish_wsi(&physical_device->wsi_device, &physical_device->instance->alloc);
#endif
}

void anv_DestroySurfaceKHR(
    VkInstance                                   _instance,
    VkSurfaceKHR                                 _surface,
    const VkAllocationCallbacks*                 pAllocator)
{
   ANV_FROM_HANDLE(anv_instance, instance, _instance);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, _surface);

   if (!surface)
      return;

   vk_free2(&instance->alloc, pAllocator, surface);
}

VkResult anv_GetPhysicalDeviceSurfaceSupportKHR(
    VkPhysicalDevice                            physicalDevice,
    uint32_t                                    queueFamilyIndex,
    VkSurfaceKHR                                _surface,
    VkBool32*                                   pSupported)
{
   ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, _surface);
   struct wsi_interface *iface = device->wsi_device.wsi[surface->platform];

   return iface->get_support(surface, &device->wsi_device,
                             &device->instance->alloc,
                             queueFamilyIndex, device->local_fd, false, pSupported);
}

VkResult anv_GetPhysicalDeviceSurfaceCapabilitiesKHR(
    VkPhysicalDevice                            physicalDevice,
    VkSurfaceKHR                                _surface,
    VkSurfaceCapabilitiesKHR*                   pSurfaceCapabilities)
{
   ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, _surface);
   struct wsi_interface *iface = device->wsi_device.wsi[surface->platform];

   return iface->get_capabilities(surface, pSurfaceCapabilities);
}

VkResult anv_GetPhysicalDeviceSurfaceFormatsKHR(
    VkPhysicalDevice                            physicalDevice,
    VkSurfaceKHR                                _surface,
    uint32_t*                                   pSurfaceFormatCount,
    VkSurfaceFormatKHR*                         pSurfaceFormats)
{
   ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, _surface);
   struct wsi_interface *iface = device->wsi_device.wsi[surface->platform];

   return iface->get_formats(surface, &device->wsi_device, pSurfaceFormatCount,
                             pSurfaceFormats);
}

VkResult anv_GetPhysicalDeviceSurfacePresentModesKHR(
    VkPhysicalDevice                            physicalDevice,
    VkSurfaceKHR                                _surface,
    uint32_t*                                   pPresentModeCount,
    VkPresentModeKHR*                           pPresentModes)
{
   ANV_FROM_HANDLE(anv_physical_device, device, physicalDevice);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, _surface);
   struct wsi_interface *iface = device->wsi_device.wsi[surface->platform];

   return iface->get_present_modes(surface, pPresentModeCount,
                                   pPresentModes);
}


static VkResult
x11_anv_wsi_image_create(VkDevice device_h,
                         const VkSwapchainCreateInfoKHR *pCreateInfo,
                         const VkAllocationCallbacks* pAllocator,
                         bool different_gpu,
                         bool linear,
                         VkImage *image_p,
                         VkDeviceMemory *memory_p,
                         uint32_t *size,
                         uint32_t *offset,
                         uint32_t *row_pitch, int *fd_p)
{
   struct anv_device *device = anv_device_from_handle(device_h);
   VkImage image_h;
   struct anv_image *image;

   VkResult result;
   result = anv_image_create(anv_device_to_handle(device),
      &(struct anv_image_create_info) {
         .isl_tiling_flags = ISL_TILING_X_BIT,
         .stride = 0,
         .vk_info =
      &(VkImageCreateInfo) {
         .sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
         .imageType = VK_IMAGE_TYPE_2D,
         .format = pCreateInfo->imageFormat,
         .extent = {
            .width = pCreateInfo->imageExtent.width,
            .height = pCreateInfo->imageExtent.height,
            .depth = 1
         },
         .mipLevels = 1,
         .arrayLayers = 1,
         .samples = 1,
         /* FIXME: Need a way to use X tiling to allow scanout */
         .tiling = VK_IMAGE_TILING_OPTIMAL,
         .usage = (pCreateInfo->imageUsage |
                   VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT),
         .flags = 0,
      }},
      NULL,
      &image_h);
   if (result != VK_SUCCESS)
      return result;

   image = anv_image_from_handle(image_h);
   assert(vk_format_is_color(image->vk_format));

   VkDeviceMemory memory_h;
   struct anv_device_memory *memory;
   result = anv_AllocateMemory(anv_device_to_handle(device),
      &(VkMemoryAllocateInfo) {
         .sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
         .allocationSize = image->size,
         .memoryTypeIndex = 0,
      },
      NULL /* XXX: pAllocator */,
      &memory_h);
   if (result != VK_SUCCESS)
      goto fail_create_image;

   memory = anv_device_memory_from_handle(memory_h);

   /* We need to set the WRITE flag on window system buffers so that GEM will
    * know we're writing to them and synchronize uses on other rings (eg if
    * the display server uses the blitter ring).
    */
   memory->bo->flags &= ~EXEC_OBJECT_ASYNC;
   memory->bo->flags |= EXEC_OBJECT_WRITE;

   anv_BindImageMemory(device_h, image_h, memory_h, 0);

   struct anv_surface *surface = &image->color_surface;
   assert(surface->isl.tiling == ISL_TILING_X);

   *row_pitch = surface->isl.row_pitch;
   int ret = anv_gem_set_tiling(device, memory->bo->gem_handle,
                                surface->isl.row_pitch, I915_TILING_X);
   if (ret) {
      /* FINISHME: Choose a better error. */
      result = vk_errorf(VK_ERROR_OUT_OF_DEVICE_MEMORY,
                         "set_tiling failed: %m");
      goto fail_alloc_memory;
   }

   int fd = anv_gem_handle_to_fd(device, memory->bo->gem_handle);
   if (fd == -1) {
      /* FINISHME: Choose a better error. */
      result = vk_errorf(VK_ERROR_OUT_OF_DEVICE_MEMORY,
                         "handle_to_fd failed: %m");
      goto fail_alloc_memory;
   }

   *image_p = image_h;
   *memory_p = memory_h;
   *fd_p = fd;
   *size = image->size;
   *offset = image->offset;
   return VK_SUCCESS;
fail_alloc_memory:
   anv_FreeMemory(device_h, memory_h, pAllocator);

fail_create_image:
   anv_DestroyImage(device_h, image_h, pAllocator);
   return result;
}

static void
x11_anv_wsi_image_free(VkDevice device,
                       const VkAllocationCallbacks* pAllocator,
                       VkImage image_h,
                       VkDeviceMemory memory_h)
{
   anv_DestroyImage(device, image_h, pAllocator);

   anv_FreeMemory(device, memory_h, pAllocator);
}

static const struct wsi_image_fns anv_wsi_image_fns = {
   .create_wsi_image = x11_anv_wsi_image_create,
   .free_wsi_image = x11_anv_wsi_image_free,
};

VkResult anv_CreateSwapchainKHR(
    VkDevice                                     _device,
    const VkSwapchainCreateInfoKHR*              pCreateInfo,
    const VkAllocationCallbacks*                 pAllocator,
    VkSwapchainKHR*                              pSwapchain)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   ICD_FROM_HANDLE(VkIcdSurfaceBase, surface, pCreateInfo->surface);
   struct wsi_interface *iface =
      device->instance->physicalDevice.wsi_device.wsi[surface->platform];
   struct wsi_swapchain *swapchain;
   const VkAllocationCallbacks *alloc;

   if (pAllocator)
     alloc = pAllocator;
   else
     alloc = &device->alloc;
   VkResult result = iface->create_swapchain(surface, _device,
                                             &device->instance->physicalDevice.wsi_device,
                                             device->instance->physicalDevice.local_fd,
                                             pCreateInfo,
                                             alloc, &anv_wsi_image_fns,
                                             &swapchain);
   if (result != VK_SUCCESS)
      return result;

   swapchain->alloc = *alloc;

   for (unsigned i = 0; i < ARRAY_SIZE(swapchain->fences); i++)
      swapchain->fences[i] = VK_NULL_HANDLE;

   *pSwapchain = wsi_swapchain_to_handle(swapchain);

   return VK_SUCCESS;
}

void anv_DestroySwapchainKHR(
    VkDevice                                     _device,
    VkSwapchainKHR                               _swapchain,
    const VkAllocationCallbacks*                 pAllocator)
{
   ANV_FROM_HANDLE(anv_device, device, _device);
   ANV_FROM_HANDLE(wsi_swapchain, swapchain, _swapchain);
   const VkAllocationCallbacks *alloc;

   if (!swapchain)
      return;

   if (pAllocator)
     alloc = pAllocator;
   else
     alloc = &device->alloc;
   for (unsigned i = 0; i < ARRAY_SIZE(swapchain->fences); i++) {
      if (swapchain->fences[i] != VK_NULL_HANDLE)
         anv_DestroyFence(_device, swapchain->fences[i], pAllocator);
   }

   swapchain->destroy(swapchain, alloc);
}

VkResult anv_GetSwapchainImagesKHR(
    VkDevice                                     device,
    VkSwapchainKHR                               _swapchain,
    uint32_t*                                    pSwapchainImageCount,
    VkImage*                                     pSwapchainImages)
{
   ANV_FROM_HANDLE(wsi_swapchain, swapchain, _swapchain);

   return swapchain->get_images(swapchain, pSwapchainImageCount,
                                pSwapchainImages);
}

VkResult anv_AcquireNextImageKHR(
    VkDevice                                     device,
    VkSwapchainKHR                               _swapchain,
    uint64_t                                     timeout,
    VkSemaphore                                  semaphore,
    VkFence                                      _fence,
    uint32_t*                                    pImageIndex)
{
   ANV_FROM_HANDLE(wsi_swapchain, swapchain, _swapchain);
   ANV_FROM_HANDLE(anv_fence, fence, _fence);

   VkResult result = swapchain->acquire_next_image(swapchain, timeout,
                                                   semaphore, pImageIndex);

   /* Thanks to implicit sync, the image is ready immediately. */
   if (fence)
      fence->state = ANV_FENCE_STATE_SIGNALED;

   return result;
}

VkResult anv_QueuePresentKHR(
    VkQueue                                  _queue,
    const VkPresentInfoKHR*                  pPresentInfo)
{
   ANV_FROM_HANDLE(anv_queue, queue, _queue);
   VkResult result = VK_SUCCESS;

   const VkPresentRegionsKHR *regions =
      vk_find_struct_const(pPresentInfo->pNext, PRESENT_REGIONS_KHR);

   for (uint32_t i = 0; i < pPresentInfo->swapchainCount; i++) {
      ANV_FROM_HANDLE(wsi_swapchain, swapchain, pPresentInfo->pSwapchains[i]);
      VkResult item_result;

      const VkPresentRegionKHR *region = NULL;
      if (regions && regions->pRegions)
         region = &regions->pRegions[i];

      assert(anv_device_from_handle(swapchain->device) == queue->device);

      if (swapchain->fences[0] == VK_NULL_HANDLE) {
         item_result = anv_CreateFence(anv_device_to_handle(queue->device),
            &(VkFenceCreateInfo) {
               .sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO,
               .flags = 0,
            }, &swapchain->alloc, &swapchain->fences[0]);
         if (pPresentInfo->pResults != NULL)
            pPresentInfo->pResults[i] = item_result;
         result = result == VK_SUCCESS ? item_result : result;
         if (item_result != VK_SUCCESS)
            continue;
      } else {
         anv_ResetFences(anv_device_to_handle(queue->device),
                         1, &swapchain->fences[0]);
      }

      anv_QueueSubmit(_queue, 0, NULL, swapchain->fences[0]);

      item_result = swapchain->queue_present(swapchain,
                                             pPresentInfo->pImageIndices[i],
                                             region);
      /* TODO: What if one of them returns OUT_OF_DATE? */
      if (pPresentInfo->pResults != NULL)
         pPresentInfo->pResults[i] = item_result;
      result = result == VK_SUCCESS ? item_result : result;
      if (item_result != VK_SUCCESS)
            continue;

      VkFence last = swapchain->fences[2];
      swapchain->fences[2] = swapchain->fences[1];
      swapchain->fences[1] = swapchain->fences[0];
      swapchain->fences[0] = last;

      if (last != VK_NULL_HANDLE) {
         anv_WaitForFences(anv_device_to_handle(queue->device),
                           1, &last, true, 1);
      }
   }

   return VK_SUCCESS;
}