linux-kernel - [RFC PATCH 08/17] net: ipa: Add support for IPA v2.x interrupts

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Date:   Mon, 20 Sep 2021 08:38:02 +0530
From:   Sireesh Kodali <sireeshkodali1@...il.com>
To:     phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, elder@...nel.org
Cc:     Vladimir Lypak <vladimir.lypak@...il.com>,
        Sireesh Kodali <sireeshkodali1@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [RFC PATCH 08/17] net: ipa: Add support for IPA v2.x interrupts

From: Vladimir Lypak <vladimir.lypak@...il.com>

Interrupts on IPA v2.x have different numbers from the v3.x and above
interrupts. IPA v2.x also doesn't support the TX_SUSPEND irq, like v3.0

Signed-off-by: Vladimir Lypak <vladimir.lypak@...il.com>
Signed-off-by: Sireesh Kodali <sireeshkodali1@...il.com>
---
 drivers/net/ipa/ipa_interrupt.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 94708a23a597..37b5932253aa 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -63,6 +63,11 @@ static bool ipa_interrupt_check_fixup(enum ipa_irq_id *irq_id, enum ipa_version
 
 	if (*irq_id >= IPA_IRQ_DRBIP_PKT_EXCEED_MAX_SIZE_EN)
 		return version >= IPA_VERSION_4_9;
+	else if (*irq_id > IPA_IRQ_BAM_GSI_IDLE)
+		return version >= IPA_VERSION_3_0;
+	else if (version <= IPA_VERSION_2_6L &&
+			*irq_id >= IPA_IRQ_PROC_UC_ACK_Q_NOT_EMPTY)
+		*irq_id += 2;
 
 	return true;
 }
@@ -152,8 +157,8 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,
 
 	WARN_ON(!(mask & ipa->available));
 
-	/* IPA version 3.0 does not support TX_SUSPEND interrupt control */
-	if (ipa->version == IPA_VERSION_3_0)
+	/* IPA version <=3.0 does not support TX_SUSPEND interrupt control */
+	if (ipa->version <= IPA_VERSION_3_0)
 		return;
 
 	offset = ipa_reg_irq_suspend_en_offset(ipa->version);
@@ -190,7 +195,7 @@ void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt)
 	val = ioread32(ipa->reg_virt + offset);
 
 	/* SUSPEND interrupt status isn't cleared on IPA version 3.0 */
-	if (ipa->version == IPA_VERSION_3_0)
+	if (ipa->version <= IPA_VERSION_3_0)
 		return;
 
 	offset = ipa_reg_irq_suspend_clr_offset(ipa->version);
-- 
2.33.0