linux-kernel - [PATCH] habanalabs/goya: move mmu

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Message-Id: <20201208155749.5759-1-ogabbay@kernel.org>
Date:   Tue,  8 Dec 2020 17:57:48 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     SW_Drivers@...ana.ai, Ohad Sharabi <osharabi@...ana.ai>
Subject: [PATCH] habanalabs/goya: move mmu_prepare to context init

From: Ohad Sharabi <osharabi@...ana.ai>

Currently mmu_prepare is located at context switch.
Since we support a single context, no reason to reconfigure
the MMU registers every context switch.

Signed-off-by: Ohad Sharabi <osharabi@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
---
 drivers/misc/habanalabs/goya/goya.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 6ae34905d34f..dc32091d9b4b 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -4876,8 +4876,6 @@ int goya_context_switch(struct hl_device *hdev, u32 asid)
 
 	WREG32(mmTPC_PLL_CLK_RLX_0, 0x200020);
 
-	goya_mmu_prepare(hdev, asid);
-
 	goya_clear_sm_regs(hdev);
 
 	return 0;
@@ -5312,6 +5310,9 @@ static int goya_get_eeprom_data(struct hl_device *hdev, void *data,
 
 static int goya_ctx_init(struct hl_ctx *ctx)
 {
+	if (ctx->asid != HL_KERNEL_ASID_ID)
+		goya_mmu_prepare(ctx->hdev, ctx->asid);
+
 	return 0;
 }
 
-- 
2.17.1