accel/ivpu: Add support for VPU_JOB_FLAGS_NULL_SUBMISSION_MASK

Add test_mode = 3 that add VPU_JOB_FLAGS_NULL_SUBMISSION_MASK
flag to the job send to the VPU device. Then the VPU will process
the job but won't execute commands (except the command to signal
the fence).

This can be used to estimate job processing overhead in the host
software and VPU firmware.

Unlike the null hardware mode, the null submission mode will
still work even if UMD uses VPU fences to track job completion.

Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231028133415.1169975-6-stanislaw.gruszka@linux.intel.com

diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c
index 8f5655dfd83fb67174ecadd37b2aa6202af22372..4ec8d25a120cfacbdeb42e0e4b63ed7ac82feec6 100644 (file)
--- a/drivers/accel/ivpu/ivpu_drv.c
+++ b/drivers/accel/ivpu/ivpu_drv.c
@@ -39,7 +39,7 @@ MODULE_PARM_DESC(dbg_mask, "Driver debug mask. See IVPU_DBG_* macros.");
 
 int ivpu_test_mode;
 module_param_named_unsafe(test_mode, ivpu_test_mode, int, 0644);
-MODULE_PARM_DESC(test_mode, "Test mode: 0 - normal operation, 1 - fw unit test, 2 - null hw");
+MODULE_PARM_DESC(test_mode, "Test mode: 0 - disabled , 1 - fw unit test, 2 - null hw, 3 - null submission");
 
 u8 ivpu_pll_min_ratio;
 module_param_named(pll_min_ratio, ivpu_pll_min_ratio, byte, 0644);

diff --git a/drivers/accel/ivpu/ivpu_drv.h b/drivers/accel/ivpu/ivpu_drv.h
index 12a63f8a73e8ab598ca3f3030fae1e0db5d59b54..fdec8272da8cf7662ed50acf37f9ea76a91bcc8b 100644 (file)
--- a/drivers/accel/ivpu/ivpu_drv.h
+++ b/drivers/accel/ivpu/ivpu_drv.h
@@ -147,9 +147,10 @@ extern u8 ivpu_pll_min_ratio;
 extern u8 ivpu_pll_max_ratio;
 extern bool ivpu_disable_mmu_cont_pages;
 
-#define IVPU_TEST_MODE_DISABLED  0
-#define IVPU_TEST_MODE_FW_TEST   1
-#define IVPU_TEST_MODE_NULL_HW   2
+#define IVPU_TEST_MODE_DISABLED        0
+#define IVPU_TEST_MODE_FW_TEST         1
+#define IVPU_TEST_MODE_NULL_HW         2
+#define IVPU_TEST_MODE_NULL_SUBMISSION 3
 extern int ivpu_test_mode;
 
 struct ivpu_file_priv *ivpu_file_priv_get(struct ivpu_file_priv *file_priv);

diff --git a/drivers/accel/ivpu/ivpu_job.c b/drivers/accel/ivpu/ivpu_job.c
index 689dc0d13b8fadece4cbc0e56cbc21c4e2cc3509..646b8f812901512f2b323f59da9105f46684189c 100644 (file)
--- a/drivers/accel/ivpu/ivpu_job.c
+++ b/drivers/accel/ivpu/ivpu_job.c
@@ -196,6 +196,8 @@ static int ivpu_cmdq_push_job(struct ivpu_cmdq *cmdq, struct ivpu_job *job)
        entry->batch_buf_addr = job->cmd_buf_vpu_addr;
        entry->job_id = job->job_id;
        entry->flags = 0;
+       if (unlikely(ivpu_test_mode == IVPU_TEST_MODE_NULL_SUBMISSION))
+               entry->flags = VPU_JOB_FLAGS_NULL_SUBMISSION_MASK;
        wmb(); /* Ensure that tail is updated after filling entry */
        header->tail = next_entry;
        wmb(); /* Flush WC buffer for jobq header */