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From: Andrew Jeffery <andrew@aj.id.au>
To: openipmi-developer@lists.sourceforge.net,
	openbmc@lists.ozlabs.org, minyard@acm.org
Cc: devicetree@vger.kernel.org, tmaimon77@gmail.com,
	linux-aspeed@lists.ozlabs.org, KWLIU@nuvoton.com,
	avifishman70@gmail.com, venture@google.com,
	chiawei_wang@aspeedtech.com, linux-kernel@vger.kernel.org,
	tali.perry1@gmail.com, robh+dt@kernel.org, arnd@arndb.de,
	zweiss@equinix.com, linux-arm-kernel@lists.infradead.org,
	benjaminfair@google.com
Subject: [PATCH v4 10/16] ipmi: kcs_bmc: Enable IBF on open
Date: Tue,  8 Jun 2021 20:17:51 +0930	[thread overview]
Message-ID: <20210608104757.582199-11-andrew@aj.id.au> (raw)
In-Reply-To: <20210608104757.582199-1-andrew@aj.id.au>

This way devices don't get delivered IRQs when no-one is interested.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
---
 drivers/char/ipmi/kcs_bmc.c         | 25 ++++++++++---------------
 drivers/char/ipmi/kcs_bmc_aspeed.c  |  3 +--
 drivers/char/ipmi/kcs_bmc_npcm7xx.c |  3 +--
 3 files changed, 12 insertions(+), 19 deletions(-)

diff --git a/drivers/char/ipmi/kcs_bmc.c b/drivers/char/ipmi/kcs_bmc.c
index 91eb43746cef..03d02a848f3a 100644
--- a/drivers/char/ipmi/kcs_bmc.c
+++ b/drivers/char/ipmi/kcs_bmc.c
@@ -55,24 +55,12 @@ EXPORT_SYMBOL(kcs_bmc_update_status);
 irqreturn_t kcs_bmc_handle_event(struct kcs_bmc_device *kcs_bmc)
 {
 	struct kcs_bmc_client *client;
-	irqreturn_t rc;
+	irqreturn_t rc = IRQ_NONE;
 
 	spin_lock(&kcs_bmc->lock);
 	client = kcs_bmc->client;
-	if (client) {
+	if (client)
 		rc = client->ops->event(client);
-	} else {
-		u8 status;
-
-		status = kcs_bmc_read_status(kcs_bmc);
-		if (status & KCS_BMC_STR_IBF) {
-			/* Ack the event by reading the data */
-			kcs_bmc_read_data(kcs_bmc);
-			rc = IRQ_HANDLED;
-		} else {
-			rc = IRQ_NONE;
-		}
-	}
 	spin_unlock(&kcs_bmc->lock);
 
 	return rc;
@@ -87,7 +75,10 @@ int kcs_bmc_enable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client
 	if (kcs_bmc->client) {
 		rc = -EBUSY;
 	} else {
+		u8 mask = KCS_BMC_EVENT_TYPE_IBF;
+
 		kcs_bmc->client = client;
+		kcs_bmc_update_event_mask(kcs_bmc, mask, mask);
 		rc = 0;
 	}
 	spin_unlock_irq(&kcs_bmc->lock);
@@ -99,8 +90,12 @@ EXPORT_SYMBOL(kcs_bmc_enable_device);
 void kcs_bmc_disable_device(struct kcs_bmc_device *kcs_bmc, struct kcs_bmc_client *client)
 {
 	spin_lock_irq(&kcs_bmc->lock);
-	if (client == kcs_bmc->client)
+	if (client == kcs_bmc->client) {
+		u8 mask = KCS_BMC_EVENT_TYPE_IBF | KCS_BMC_EVENT_TYPE_OBE;
+
+		kcs_bmc_update_event_mask(kcs_bmc, mask, 0);
 		kcs_bmc->client = NULL;
+	}
 	spin_unlock_irq(&kcs_bmc->lock);
 }
 EXPORT_SYMBOL(kcs_bmc_disable_device);
diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index 5bf8d013e4ae..43994688dc8a 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -416,8 +416,7 @@ static int aspeed_kcs_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	aspeed_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF | KCS_BMC_EVENT_TYPE_OBE),
-				   KCS_BMC_EVENT_TYPE_IBF);
+	aspeed_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF | KCS_BMC_EVENT_TYPE_OBE), 0);
 	aspeed_kcs_enable_channel(kcs_bmc, true);
 
 	rc = kcs_bmc_add_device(&priv->kcs_bmc);
diff --git a/drivers/char/ipmi/kcs_bmc_npcm7xx.c b/drivers/char/ipmi/kcs_bmc_npcm7xx.c
index ef81a715f88a..7961fec56476 100644
--- a/drivers/char/ipmi/kcs_bmc_npcm7xx.c
+++ b/drivers/char/ipmi/kcs_bmc_npcm7xx.c
@@ -202,8 +202,7 @@ static int npcm7xx_kcs_probe(struct platform_device *pdev)
 	if (rc)
 		return rc;
 
-	npcm7xx_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF | KCS_BMC_EVENT_TYPE_OBE),
-				    KCS_BMC_EVENT_TYPE_IBF);
+	npcm7xx_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF | KCS_BMC_EVENT_TYPE_OBE), 0);
 	npcm7xx_kcs_enable_channel(kcs_bmc, true);
 
 	rc = kcs_bmc_add_device(kcs_bmc);
-- 
2.30.2


  parent reply	other threads:[~2021-06-08 10:54 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-08 10:47 [PATCH v4 00/16] ipmi: Allow raw access to KCS devices Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 01/16] ipmi: kcs_bmc_aspeed: Use of match data to extract KCS properties Andrew Jeffery
2021-06-18 23:19   ` Zev Weiss
2021-06-08 10:47 ` [PATCH v4 02/16] ipmi: kcs_bmc: Make status update atomic Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 03/16] ipmi: kcs_bmc: Rename {read, write}_{status, data}() functions Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 04/16] ipmi: kcs_bmc: Split out kcs_bmc_cdev_ipmi Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 05/16] ipmi: kcs_bmc: Turn the driver data-structures inside-out Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 06/16] ipmi: kcs_bmc: Split headers into device and client Andrew Jeffery
2021-06-18 23:24   ` Zev Weiss
2021-06-08 10:47 ` [PATCH v4 07/16] ipmi: kcs_bmc: Strip private client data from struct kcs_bmc Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 08/16] ipmi: kcs_bmc: Decouple the IPMI chardev from the core Andrew Jeffery
2021-06-18 23:26   ` Zev Weiss
2021-06-08 10:47 ` [PATCH v4 09/16] ipmi: kcs_bmc: Allow clients to control KCS IRQ state Andrew Jeffery
2021-06-08 10:47 ` Andrew Jeffery [this message]
2021-06-08 10:47 ` [PATCH v4 11/16] ipmi: kcs_bmc: Add serio adaptor Andrew Jeffery
2021-06-18 23:30   ` Zev Weiss
2021-06-08 10:47 ` [PATCH v4 12/16] dt-bindings: ipmi: Convert ASPEED KCS binding to schema Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 13/16] dt-bindings: ipmi: Add optional SerIRQ property to ASPEED KCS devices Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 14/16] ipmi: kcs_bmc_aspeed: Implement KCS SerIRQ configuration Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 15/16] ipmi: kcs_bmc_aspeed: Fix IBFIE typo from datasheet Andrew Jeffery
2021-06-08 10:47 ` [PATCH v4 16/16] ipmi: kcs_bmc_aspeed: Optionally apply status address Andrew Jeffery
2021-06-15 18:46 ` [PATCH v4 00/16] ipmi: Allow raw access to KCS devices Corey Minyard
2021-06-15 22:43   ` Andrew Jeffery

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