Secure buffer is only able to be read with trusted ip block.
So we need use GFX ip to read it back instead of CPU.
Steps:
1. use write_data packet to write 0xdeadbeaf to secure buffer,
2. use atmoic_mem packet and ATOMIC_CMPSWAP_RTN_32 opcode to compare
the cmp_data(0xdeadbeaf) to the written data which has been encrypted.
If the result is equal, then overwrite the src_data(0x12345678) to the
secure buffer and return directly. Otherwise loop again until gfx timeout
and the secure buffer data unchanged.
Signed-off-by: Aaron Liu <aaron.liu@xxxxxxx>
---
tests/amdgpu/basic_tests.c | 43 +++++++++++++++++++++++++++++++++++++++++--
1 file changed, 41 insertions(+), 2 deletions(-)
diff --git a/tests/amdgpu/basic_tests.c b/tests/amdgpu/basic_tests.c
index 956be93..907237e 100644
--- a/tests/amdgpu/basic_tests.c
+++ b/tests/amdgpu/basic_tests.c
@@ -160,6 +160,20 @@ CU_TestInfo basic_tests[] = {
* 2 - ce
*/
+#define PACKET3_ATOMIC_MEM 0x1E
+#define TC_OP_ATOMIC_CMPSWAP_RTN_32 0x00000008
+#define ATOMIC_MEM_COMMAND(x) ((x) << 8)
+ /* 0 - single_pass_atomic.
+ * 1 - loop_until_compare_satisfied.
+ */
+#define ATOMIC_MEM_CACHEPOLICAY(x) ((x) << 25)
+ /* 0 - lru.
+ * 1 - stream.
+ */
+#define ATOMIC_MEM_ENGINESEL(x) ((x) << 30)
+ /* 0 - micro_engine.
+ */
+
#define PACKET3_DMA_DATA 0x50
/* 1. header
* 2. CONTROL
@@ -1472,8 +1486,33 @@ amdgpu_command_submission_write_linear_helper_with_secure(amdgpu_device_handle
/* verify if SDMA test result meets with expected */
i = 0;
- while(i < sdma_write_length) {
- CU_ASSERT_EQUAL(bo_cpu[i++], 0xdeadbeaf);
+ if (!secure) {
+ while(i < sdma_write_length) {
+ CU_ASSERT_EQUAL(bo_cpu[i++], 0xdeadbeaf);
+ }
+ } else if (ip_type == AMDGPU_HW_IP_GFX) {
+ memset((void*)pm4, 0, pm4_dw * sizeof(uint32_t));
+ pm4[i++] = PACKET3(PACKET3_ATOMIC_MEM, 7);
+ /* atomic opcode for 32b w/ RTN and ATOMIC_SWAPCMP_RTN
+ * command, 1-loop_until_compare_satisfied.
+ * single_pass_atomic, 0-lru
+ * engine_sel, 0-micro_engine
+ */
+ pm4[i++] = (TC_OP_ATOMIC_CMPSWAP_RTN_32 |
+ ATOMIC_MEM_COMMAND(1) |
+ ATOMIC_MEM_CACHEPOLICAY(0) |
+ ATOMIC_MEM_ENGINESEL(0));
+ pm4[i++] = 0xfffffffc & bo_mc;
+ pm4[i++] = (0xffffffff00000000 & bo_mc) >> 32;
+ pm4[i++] = 0x12345678;
+ pm4[i++] = 0x0;
+ pm4[i++] = 0xdeadbeaf;
+ pm4[i++] = 0x0;
+ pm4[i++] = 0x100;
+ amdgpu_test_exec_cs_helper_raw(device, context_handle,
+ ip_type, ring_id, i, pm4,
+ 1, resources, ib_info,
+ ibs_request, true);
}
r = amdgpu_bo_unmap_and_free(bo, va_handle, bo_mc,
--
2.7.4
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