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agc: emit async memory semaphores and execute them in the CP

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Claxten authored and nmzik committed 2026-10-27 04:23:00 +01:00
1 parent 914a3bb4b8
commit 1b70938052
9 files changed
+144 -2
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src/libs/agc.cpp
+42 -2
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@@ -2480,6 +2480,9 @@ static constexpr uint32_t AGC_DRAW_INDIRECT_MULTI_END_TAG = 0xc6000000u;
static constexpr uint32_t AGC_WAIT_USER_DATA_BEGIN_32_TAG = 0xc8010000u;
static constexpr uint32_t AGC_WAIT_USER_DATA_BEGIN_64_TAG = 0xc8020000u;
static constexpr uint32_t AGC_WAIT_USER_DATA_END_TAG = 0xc8000000u;
static constexpr uint32_t AGC_MEM_SEMAPHORE_SIGNAL_BEGIN_TAG = 0xc9010000u;
static constexpr uint32_t AGC_MEM_SEMAPHORE_WAIT_BEGIN_TAG = 0xc9020000u;
static constexpr uint32_t AGC_MEM_SEMAPHORE_END_TAG = 0xc9000000u;
static constexpr uint32_t AGC_WAIT_USER_DATA_BEGIN_DW = 4u;
static constexpr uint32_t AGC_INTERNAL_DATA_PACKET_SIZE_DW = 3u;
@@ -3077,6 +3080,42 @@ uint32_t* KYTY_SYSV_ABI AgcAcbWaitRegMem(CommandBuffer* buf, uint8_t size, uint8
poll_cycles);
}
uint32_t* KYTY_SYSV_ABI AgcAcbMemSemaphore(CommandBuffer* buf, const volatile void* address,
uint8_t mailbox, uint8_t signal_type, uint8_t op) {
EXIT_NOT_IMPLEMENTED(op != 6u && op != 7u);
auto* cmd =
buf->AllocateDW(AGC_WAIT_USER_DATA_BEGIN_DW + AGC_INTERNAL_DATA_PACKET_SIZE_DW + 4u);
if (cmd == nullptr) {
return nullptr;
}
const auto address_value = reinterpret_cast<uint64_t>(address);
const bool signal = (op == 6u);
cmd[0] = KYTY_PM4(AGC_WAIT_USER_DATA_BEGIN_DW, Pm4::IT_SET_UCONFIG_REG, 1u);
cmd[1] = AGC_INTERNAL_DATA_REGISTER;
cmd[2] = (signal ? AGC_MEM_SEMAPHORE_SIGNAL_BEGIN_TAG : AGC_MEM_SEMAPHORE_WAIT_BEGIN_TAG) |
static_cast<uint32_t>((address_value >> 32u) & 0xffffu);
cmd[3] = static_cast<uint32_t>(address_value);
// A signal pads with a NOP header where a wait ends with its end marker.
auto* semaphore = cmd + AGC_WAIT_USER_DATA_BEGIN_DW;
if (signal) {
semaphore[0] = KYTY_PM4(AGC_INTERNAL_DATA_PACKET_SIZE_DW, Pm4::IT_NOP, 0u);
semaphore += AGC_INTERNAL_DATA_PACKET_SIZE_DW;
}
semaphore[0] = KYTY_PM4(4, Pm4::IT_MEM_SEMAPHORE, 0u);
semaphore[1] = static_cast<uint32_t>(address_value) & ~0x7u;
semaphore[2] = static_cast<uint32_t>(address_value >> 32u);
semaphore[3] = (static_cast<uint32_t>(op) << 29u) | ((signal_type & 0x1u) << 20u) |
((mailbox & 0x1u) << 16u);
if (!signal) {
write_agc_internal_data_packet(semaphore + 4, AGC_MEM_SEMAPHORE_END_TAG);
}
return cmd;
}
uint64_t KYTY_SYSV_ABI AgcAcbWaitOnAddressGetSize(uint8_t size) {
PRINT_NAME();
@@ -3840,11 +3879,12 @@ bool AgcIsInternalDataPacket(uint32_t cmd_id, const uint32_t* payload) {
const auto size_dw = KYTY_PM4_LEN(cmd_id);
if (size_dw == AGC_WAIT_USER_DATA_BEGIN_DW) {
const auto tag = payload[1] & 0xffff0000u;
return tag == AGC_WAIT_USER_DATA_BEGIN_32_TAG || tag == AGC_WAIT_USER_DATA_BEGIN_64_TAG;
return tag == AGC_WAIT_USER_DATA_BEGIN_32_TAG || tag == AGC_WAIT_USER_DATA_BEGIN_64_TAG ||
tag == AGC_MEM_SEMAPHORE_SIGNAL_BEGIN_TAG || tag == AGC_MEM_SEMAPHORE_WAIT_BEGIN_TAG;
}
return size_dw == AGC_INTERNAL_DATA_PACKET_SIZE_DW &&
(payload[1] == AGC_WAIT_USER_DATA_END_TAG ||
(payload[1] == AGC_WAIT_USER_DATA_END_TAG || payload[1] == AGC_MEM_SEMAPHORE_END_TAG ||
payload[1] == AGC_DRAW_INDIRECT_MULTI_BEGIN_TAG ||
payload[1] == AGC_DRAW_INDIRECT_MULTI_END_TAG);
}