habanalabs/gaudi: restore user registers when context opens

Because we don't have multiple contexts in GAUDI, and to minimize
calls to is_idle function (which uses many register reads), move
the call to clear the user registers to the opening of the single
user context.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 05cfc02..566bf45 100644 (file)
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -6087,7 +6087,7 @@ static int gaudi_restore_user_registers(struct hl_device *hdev)
 
 static int gaudi_context_switch(struct hl_device *hdev, u32 asid)
 {
-       return gaudi_restore_user_registers(hdev);
+       return 0;
 }
 
 static int gaudi_mmu_clear_pgt_range(struct hl_device *hdev)
@@ -8657,10 +8657,20 @@ static void gaudi_internal_cb_pool_fini(struct hl_device *hdev,
 
 static int gaudi_ctx_init(struct hl_ctx *ctx)
 {
+       int rc;
+
        if (ctx->asid == HL_KERNEL_ASID_ID)
                return 0;
 
-       return gaudi_internal_cb_pool_init(ctx->hdev, ctx);
+       rc = gaudi_internal_cb_pool_init(ctx->hdev, ctx);
+       if (rc)
+               return rc;
+
+       rc = gaudi_restore_user_registers(ctx->hdev);
+       if (rc)
+               gaudi_internal_cb_pool_fini(ctx->hdev, ctx);
+
+       return rc;
 }
 
 static void gaudi_ctx_fini(struct hl_ctx *ctx)