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Vulkan: Use a separate queue for presenting. 

Before this change, we simply fail if the device does not expose one
queue family that supports both graphics and present. Currently this is
fine, since devices tend to lay out their queues in this way. NV, for
instance, tends to have one queue family for all graphics operations and
one more for transfer only. However, it's not a hard requirement, and it
is cheap to use a separate queue, so we might as well.
This commit is contained in:
spxtr 2017-09-04 14:35:53 -07:00
parent 3e47baa40c
commit a5be5a3a76
4 changed files with 79 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Source/Core/VideoBackends/Vulkan/CommandBufferManager.cpp
View File

@ -352,7 +352,7 @@ void CommandBufferManager::SubmitCommandBuffer(size_t index, VkSemaphore wait_se
&present_image_index,
nullptr};
res = vkQueuePresentKHR(g_vulkan_context->GetGraphicsQueue(), &present_info);
res = vkQueuePresentKHR(g_vulkan_context->GetPresentQueue(), &present_info);
if (res != VK_SUCCESS && res != VK_ERROR_OUT_OF_DATE_KHR && res != VK_SUBOPTIMAL_KHR)
LOG_VULKAN_ERROR(res, "vkQueuePresentKHR failed: ");
}

12
Source/Core/VideoBackends/Vulkan/SwapChain.cpp
View File

@ -327,7 +327,6 @@ bool SwapChain::CreateSwapChain()
VkSwapchainKHR old_swap_chain = m_swap_chain;
// Now we can actually create the swap chain
// TODO: Handle case where the present queue is not the graphics queue.
VkSwapchainCreateInfoKHR swap_chain_info = {VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR,
nullptr,
0,
@ -346,6 +345,17 @@ bool SwapChain::CreateSwapChain()
m_present_mode,
VK_TRUE,
old_swap_chain};
std::array<uint32_t, 2> indices = {{
g_vulkan_context->GetGraphicsQueueFamilyIndex(),
g_vulkan_context->GetPresentQueueFamilyIndex(),
}};
if (g_vulkan_context->GetGraphicsQueueFamilyIndex() !=
g_vulkan_context->GetPresentQueueFamilyIndex())
{
swap_chain_info.imageSharingMode = VK_SHARING_MODE_CONCURRENT;
swap_chain_info.queueFamilyIndexCount = 2;
swap_chain_info.pQueueFamilyIndices = indices.data();
}
res =
vkCreateSwapchainKHR(g_vulkan_context->GetDevice(), &swap_chain_info, nullptr, &m_swap_chain);

71
Source/Core/VideoBackends/Vulkan/VulkanContext.cpp
View File

@ -494,15 +494,22 @@ bool VulkanContext::CreateDevice(VkSurfaceKHR surface, bool enable_validation_la
queue_family_properties.data());
INFO_LOG(VIDEO, "%u vulkan queue families", queue_family_count);
// Find a graphics queue
// Currently we only use a single queue for both graphics and presenting.
// TODO: In the future we could do post-processing and presenting on a different queue.
// Find graphics and present queues.
m_graphics_queue_family_index = queue_family_count;
m_present_queue_family_index = queue_family_count;
for (uint32_t i = 0; i < queue_family_count; i++)
{
if (queue_family_properties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
VkBool32 graphics_supported = queue_family_properties[i].queueFlags & VK_QUEUE_GRAPHICS_BIT;
if (graphics_supported)
{
// Check that it can present to our surface from this queue
m_graphics_queue_family_index = i;
// Quit now, no need for a present queue.
if (!surface)
{
break;
}
}
if (surface)
{
VkBool32 present_supported;
@ -516,14 +523,12 @@ bool VulkanContext::CreateDevice(VkSurfaceKHR surface, bool enable_validation_la
if (present_supported)
{
m_graphics_queue_family_index = i;
break;
m_present_queue_family_index = i;
}
}
else
// Prefer one queue family index that does both graphics and present.
if (graphics_supported && present_supported)
{
// We don't need present, so any graphics queue will do.
m_graphics_queue_family_index = i;
break;
}
}
@ -533,6 +538,11 @@ bool VulkanContext::CreateDevice(VkSurfaceKHR surface, bool enable_validation_la
ERROR_LOG(VIDEO, "Vulkan: Failed to find an acceptable graphics queue.");
return false;
}
if (surface && m_present_queue_family_index == queue_family_count)
{
ERROR_LOG(VIDEO, "Vulkan: Failed to find an acceptable present queue.");
return false;
}
VkDeviceCreateInfo device_info = {};
device_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
@ -540,15 +550,32 @@ bool VulkanContext::CreateDevice(VkSurfaceKHR surface, bool enable_validation_la
device_info.flags = 0;
static constexpr float queue_priorities[] = {1.0f};
VkDeviceQueueCreateInfo queue_info = {};
queue_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
queue_info.pNext = nullptr;
queue_info.flags = 0;
queue_info.queueFamilyIndex = m_graphics_queue_family_index;
queue_info.queueCount = 1;
queue_info.pQueuePriorities = queue_priorities;
VkDeviceQueueCreateInfo graphics_queue_info = {};
graphics_queue_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
graphics_queue_info.pNext = nullptr;
graphics_queue_info.flags = 0;
graphics_queue_info.queueFamilyIndex = m_graphics_queue_family_index;
graphics_queue_info.queueCount = 1;
graphics_queue_info.pQueuePriorities = queue_priorities;
VkDeviceQueueCreateInfo present_queue_info = {};
present_queue_info.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
present_queue_info.pNext = nullptr;
present_queue_info.flags = 0;
present_queue_info.queueFamilyIndex = m_present_queue_family_index;
present_queue_info.queueCount = 1;
present_queue_info.pQueuePriorities = queue_priorities;
std::array<VkDeviceQueueCreateInfo, 2> queue_infos = {{
graphics_queue_info, present_queue_info,
}};
device_info.queueCreateInfoCount = 1;
device_info.pQueueCreateInfos = &queue_info;
if (m_graphics_queue_family_index != m_present_queue_family_index)
{
device_info.queueCreateInfoCount = 2;
}
device_info.pQueueCreateInfos = queue_infos.data();
ExtensionList enabled_extensions;
if (!SelectDeviceExtensions(&enabled_extensions, surface != VK_NULL_HANDLE))
@ -584,8 +611,12 @@ bool VulkanContext::CreateDevice(VkSurfaceKHR surface, bool enable_validation_la
if (!LoadVulkanDeviceFunctions(m_device))
return false;
// Grab the graphics queue (only one we're using at this point).
// Grab the graphics and present queues.
vkGetDeviceQueue(m_device, m_graphics_queue_family_index, 0, &m_graphics_queue);
if (surface)
{
vkGetDeviceQueue(m_device, m_present_queue_family_index, 0, &m_present_queue);
}
return true;
}

4
Source/Core/VideoBackends/Vulkan/VulkanContext.h
View File

@ -57,6 +57,8 @@ public:
VkDevice GetDevice() const { return m_device; }
VkQueue GetGraphicsQueue() const { return m_graphics_queue; }
u32 GetGraphicsQueueFamilyIndex() const { return m_graphics_queue_family_index; }
VkQueue GetPresentQueue() const { return m_present_queue; }
u32 GetPresentQueueFamilyIndex() const { return m_present_queue_family_index; }
const VkQueueFamilyProperties& GetGraphicsQueueProperties() const
{
return m_graphics_queue_properties;
@ -119,6 +121,8 @@ private:
VkQueue m_graphics_queue = VK_NULL_HANDLE;
u32 m_graphics_queue_family_index = 0;
VkQueue m_present_queue = VK_NULL_HANDLE;
u32 m_present_queue_family_index = 0;
VkQueueFamilyProperties m_graphics_queue_properties = {};
VkDebugReportCallbackEXT m_debug_report_callback = VK_NULL_HANDLE;