A Modern GPGPU API & wip linux RDNA2+ Driver
rdna
driver
linux
gpu
amdgpu: nop
+19
+15
drivers/amdgpu/cp_encoder.cpp
+15
drivers/amdgpu/cp_encoder.cpp
···
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1
#include "cp_encoder.h"
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2
#include "cmdstream.h"
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#include "gpuinfo.h"
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+
#include <cassert>
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CPEncoder::CPEncoder(GpuInfo &info, uint8_t ip_type, CommandStream &cs) : info(info), ip_type(ip_type), cs(cs) {}
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void CPEncoder::nop(uint32_t count, uint32_t *content) {
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assert(count > 0, "CPEncoder::nop: count must always be >= 1");
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cs.emit(PKT3(PKT3_NOP, 0, count-1));
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if (content) {
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for (auto i = 0; i < count-1; ++i) {
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cs.emit(content[i]);
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}
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} else {
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for (auto i = 0; i < count-1; ++i) {
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cs.emit(0);
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}
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}
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}
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void CPEncoder::wait_mem(WaitMemOp op, uint64_t va, uint32_t ref, uint32_t mask) {
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cs.emit(PKT3(PKT3_WAIT_REG_MEM, 5, 0));
+4
drivers/amdgpu/cp_encoder.h
+4
drivers/amdgpu/cp_encoder.h
···
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public:
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CPEncoder(GpuInfo &info, uint8_t ip_type, CommandStream &cs);
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// nops are variable length; we can write data here if we want
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// (scratch space for example).
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void nop(uint32_t count = 1, uint32_t *content = nullptr);
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void wait_mem(WaitMemOp op, uint64_t va, uint32_t ref, uint32_t mask);
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void release_mem(uint32_t event,