habanalabs: remove redundant CB size adjustment

Driver-initiated DMA jobs are synchronized jobs, i.e. the driver polls on
fence object until the job is finished. There is no interrupt from the
device. Therefore, no need to add space for 2 * msg_prot packets to the
end of the CB. Only a single msg_prot is needed (to write the fence).

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index ccf9d925b6ed645d3b7049475473272f24c10535..756921c52cf7e13705b59df549f87ead1e78a0ce 100644 (file)
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -2827,12 +2827,6 @@ static int goya_send_job_on_qman0(struct hl_device *hdev, struct hl_cs_job *job)
 
        goya_qman0_set_security(hdev, true);
 
-       /*
-        * goya cs parser saves space for 2xpacket_msg_prot at end of CB. For
-        * synchronized kernel jobs we only need space for 1 packet_msg_prot
-        */
-       job->job_cb_size -= sizeof(struct packet_msg_prot);
-
        cb = job->patched_cb;
 
        fence_pkt = (struct packet_msg_prot *) (uintptr_t) (cb->kernel_address +
@@ -4452,8 +4446,7 @@ static int goya_memset_device_memory(struct hl_device *hdev, u64 addr, u32 size,
        job->user_cb_size = cb_size;
        job->hw_queue_id = GOYA_QUEUE_ID_DMA_0;
        job->patched_cb = job->user_cb;
-       job->job_cb_size = job->user_cb_size +
-                       sizeof(struct packet_msg_prot) * 2;
+       job->job_cb_size = job->user_cb_size + sizeof(struct packet_msg_prot);
 
        hl_debugfs_add_job(hdev, job);