linux-kernel - [PATCH net-next 6/8] net: ipa: encapsulate setting the FILT_ROUT_HASH

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Message-Id: <20220922222100.2543621-7-elder@linaro.org>
Date:   Thu, 22 Sep 2022 17:20:58 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     mka@...omium.org, evgreen@...omium.org, andersson@...nel.org,
        quic_cpratapa@...cinc.com, quic_avuyyuru@...cinc.com,
        quic_jponduru@...cinc.com, quic_subashab@...cinc.com,
        elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 6/8] net: ipa: encapsulate setting the FILT_ROUT_HASH_EN register

Create a new function that encapsulates setting the register flag
that disables filter and routing table hashing for IPA v4.2.

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_main.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 9dfa7f58a207f..cca270d2d9a68 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -306,6 +306,18 @@ static void ipa_qtime_config(struct ipa *ipa)
 	iowrite32(val, ipa->reg_virt + IPA_REG_TIMERS_XO_CLK_DIV_CFG_OFFSET);
 }
 
+static void ipa_hardware_config_hashing(struct ipa *ipa)
+{
+	u32 offset;
+
+	if (ipa->version != IPA_VERSION_4_2)
+		return;
+
+	/* IPA v4.2 does not support hashed tables, so disable them */
+	offset = ipa_reg_filt_rout_hash_en_offset(IPA_VERSION_4_2);
+	iowrite32(0, ipa->reg_virt + offset);
+}
+
 static void ipa_idle_indication_cfg(struct ipa *ipa,
 				    u32 enter_idle_debounce_thresh,
 				    bool const_non_idle_enable)
@@ -390,14 +402,7 @@ static void ipa_hardware_config(struct ipa *ipa, const struct ipa_data *data)
 		ipa_qtime_config(ipa);
 	}
 
-	/* IPA v4.2 does not support hashed tables, so disable them */
-	if (version == IPA_VERSION_4_2) {
-		u32 offset = ipa_reg_filt_rout_hash_en_offset(version);
-
-		iowrite32(0, ipa->reg_virt + offset);
-	}
-
-	/* Enable dynamic clock division */
+	ipa_hardware_config_hashing(ipa);
 	ipa_hardware_dcd_config(ipa);
 }
 
-- 
2.34.1