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Merge pull request #3395 from FernandoS27/queries 

GPU: Refactor queries implementation and correct GPU Clock.
This commit is contained in:
bunnei 2020-02-13 20:18:26 -05:00 committed by GitHub
parent 8b9a56033a d6ed31b9fa
commit 3563af2364
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 76 additions and 55 deletions
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97
src/video_core/engines/maxwell_3d.cpp
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@ -9,6 +9,7 @@
#include "core/core_timing.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/engines/shader_type.h"
#include "video_core/gpu.h"
#include "video_core/memory_manager.h"
#include "video_core/rasterizer_interface.h"
#include "video_core/textures/texture.h"
@ -519,61 +520,63 @@ void Maxwell3D::ProcessFirmwareCall4() {
regs.reg_array[0xd00] = 1;
}
void Maxwell3D::ProcessQueryGet() {
const GPUVAddr sequence_address{regs.query.QueryAddress()};
// Since the sequence address is given as a GPU VAddr, we have to convert it to an application
// VAddr before writing.
// TODO(Subv): Support the other query units.
ASSERT_MSG(regs.query.query_get.unit == Regs::QueryUnit::Crop,
"Units other than CROP are unimplemented");
u64 result = 0;
// TODO(Subv): Support the other query variables
switch (regs.query.query_get.select) {
case Regs::QuerySelect::Zero:
// This seems to actually write the query sequence to the query address.
result = regs.query.query_sequence;
break;
default:
result = 1;
UNIMPLEMENTED_MSG("Unimplemented query select type {}",
static_cast<u32>(regs.query.query_get.select.Value()));
}
// TODO(Subv): Research and implement how query sync conditions work.
void Maxwell3D::StampQueryResult(u64 payload, bool long_query) {
struct LongQueryResult {
u64_le value;
u64_le timestamp;
};
static_assert(sizeof(LongQueryResult) == 16, "LongQueryResult has wrong size");
const GPUVAddr sequence_address{regs.query.QueryAddress()};
if (long_query) {
// Write the 128-bit result structure in long mode. Note: We emulate an infinitely fast
// GPU, this command may actually take a while to complete in real hardware due to GPU
// wait queues.
LongQueryResult query_result{payload, system.GPU().GetTicks()};
memory_manager.WriteBlock(sequence_address, &query_result, sizeof(query_result));
} else {
memory_manager.Write<u32>(sequence_address, static_cast<u32>(payload));
}
}
switch (regs.query.query_get.mode) {
case Regs::QueryMode::Write:
case Regs::QueryMode::Write2: {
u32 sequence = regs.query.query_sequence;
if (regs.query.query_get.short_query) {
// Write the current query sequence to the sequence address.
// TODO(Subv): Find out what happens if you use a long query type but mark it as a short
// query.
memory_manager.Write<u32>(sequence_address, sequence);
} else {
// Write the 128-bit result structure in long mode. Note: We emulate an infinitely fast
// GPU, this command may actually take a while to complete in real hardware due to GPU
// wait queues.
LongQueryResult query_result{};
query_result.value = result;
// TODO(Subv): Generate a real GPU timestamp and write it here instead of CoreTiming
query_result.timestamp = system.CoreTiming().GetTicks();
memory_manager.WriteBlock(sequence_address, &query_result, sizeof(query_result));
}
void Maxwell3D::ProcessQueryGet() {
// TODO(Subv): Support the other query units.
ASSERT_MSG(regs.query.query_get.unit == Regs::QueryUnit::Crop,
"Units other than CROP are unimplemented");
switch (regs.query.query_get.operation) {
case Regs::QueryOperation::Release: {
const u64 result = regs.query.query_sequence;
StampQueryResult(result, regs.query.query_get.short_query == 0);
break;
}
case Regs::QueryOperation::Acquire: {
// Todo(Blinkhawk): Under this operation, the GPU waits for the CPU
// to write a value that matches the current payload.
UNIMPLEMENTED_MSG("Unimplemented query operation ACQUIRE");
break;
}
case Regs::QueryOperation::Counter: {
u64 result{};
switch (regs.query.query_get.select) {
case Regs::QuerySelect::Zero:
result = 0;
break;
default:
result = 1;
UNIMPLEMENTED_MSG("Unimplemented query select type {}",
static_cast<u32>(regs.query.query_get.select.Value()));
}
StampQueryResult(result, regs.query.query_get.short_query == 0);
break;
}
case Regs::QueryOperation::Trap: {
UNIMPLEMENTED_MSG("Unimplemented query operation TRAP");
break;
}
default: {
UNIMPLEMENTED_MSG("Unknown query operation");
break;
}
default:
UNIMPLEMENTED_MSG("Query mode {} not implemented",
static_cast<u32>(regs.query.query_get.mode.Value()));
}
}

16
src/video_core/engines/maxwell_3d.h
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@ -71,12 +71,11 @@ public:
static constexpr std::size_t MaxConstBuffers = 18;
static constexpr std::size_t MaxConstBufferSize = 0x10000;
enum class QueryMode : u32 {
Write = 0,
Sync = 1,
// TODO(Subv): It is currently unknown what the difference between method 2 and method 0
// is.
Write2 = 2,
enum class QueryOperation : u32 {
Release = 0,
Acquire = 1,
Counter = 2,
Trap = 3,
};
enum class QueryUnit : u32 {
@ -1081,7 +1080,7 @@ public:
u32 query_sequence;
union {
u32 raw;
BitField<0, 2, QueryMode> mode;
BitField<0, 2, QueryOperation> operation;
BitField<4, 1, u32> fence;
BitField<12, 4, QueryUnit> unit;
BitField<16, 1, QuerySyncCondition> sync_cond;
@ -1413,6 +1412,9 @@ private:
/// Handles a write to the QUERY_GET register.
void ProcessQueryGet();
// Writes the query result accordingly
void StampQueryResult(u64 payload, bool long_query);
// Handles Conditional Rendering
void ProcessQueryCondition();

16
src/video_core/gpu.cpp
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@ -6,6 +6,7 @@
#include "common/microprofile.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "core/memory.h"
#include "video_core/engines/fermi_2d.h"
#include "video_core/engines/kepler_compute.h"
@ -122,6 +123,19 @@ bool GPU::CancelSyncptInterrupt(const u32 syncpoint_id, const u32 value) {
return true;
}
u64 GPU::GetTicks() const {
// This values were reversed engineered by fincs from NVN
// The gpu clock is reported in units of 385/625 nanoseconds
constexpr u64 gpu_ticks_num = 384;
constexpr u64 gpu_ticks_den = 625;
const u64 cpu_ticks = system.CoreTiming().GetTicks();
const u64 nanoseconds = Core::Timing::CyclesToNs(cpu_ticks).count();
const u64 nanoseconds_num = nanoseconds / gpu_ticks_den;
const u64 nanoseconds_rem = nanoseconds % gpu_ticks_den;
return nanoseconds_num * gpu_ticks_num + (nanoseconds_rem * gpu_ticks_num) / gpu_ticks_den;
}
void GPU::FlushCommands() {
renderer.Rasterizer().FlushCommands();
}
@ -340,7 +354,7 @@ void GPU::ProcessSemaphoreTriggerMethod() {
block.sequence = regs.semaphore_sequence;
// TODO(Kmather73): Generate a real GPU timestamp and write it here instead of
// CoreTiming
block.timestamp = system.CoreTiming().GetTicks();
block.timestamp = GetTicks();
memory_manager->WriteBlock(regs.semaphore_address.SemaphoreAddress(), &block,
sizeof(block));
} else {

2
src/video_core/gpu.h
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@ -192,6 +192,8 @@ public:
bool CancelSyncptInterrupt(u32 syncpoint_id, u32 value);
u64 GetTicks() const;
std::unique_lock<std::mutex> LockSync() {
return std::unique_lock{sync_mutex};
}