Netdev Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Alex Elder <elder@linaro.org>
To: davem@davemloft.net, kuba@kernel.org
Cc: bjorn.andersson@linaro.org, evgreen@chromium.org,
	cpratapa@codeaurora.org, subashab@codeaurora.org,
	elder@kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH net-next 1/6] net: ipa: use gsi->version for channel suspend/resume
Date: Tue,  3 Aug 2021 09:00:58 -0500	[thread overview]
Message-ID: <20210803140103.1012697-2-elder@linaro.org> (raw)
In-Reply-To: <20210803140103.1012697-1-elder@linaro.org>

The GSI layer has the IPA version now, so there's no need for
version-specific flags to be passed from IPA.  One instance of
this is in gsi_channel_suspend() and gsi_channel_resume(), which
indicate whether or not the endpoint suspend is implemented by
GSI stopping the channel.  We can make that determination based
on gsi->version, eliminating the need for a Boolean flag in those
functions.

Signed-off-by: Alex Elder <elder@linaro.org>
---
 drivers/net/ipa/gsi.c          | 14 ++++++++------
 drivers/net/ipa/gsi.h          | 19 +++++++++++++++++--
 drivers/net/ipa/ipa_endpoint.c | 14 ++------------
 3 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index 3de67ba066a68..e143deddb7c09 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -1026,13 +1026,14 @@ void gsi_channel_reset(struct gsi *gsi, u32 channel_id, bool doorbell)
 	mutex_unlock(&gsi->mutex);
 }
 
-/* Stop a STARTED channel for suspend (using stop if requested) */
-int gsi_channel_suspend(struct gsi *gsi, u32 channel_id, bool stop)
+/* Stop a started channel for suspend */
+int gsi_channel_suspend(struct gsi *gsi, u32 channel_id)
 {
 	struct gsi_channel *channel = &gsi->channel[channel_id];
 	int ret;
 
-	ret = __gsi_channel_stop(channel, stop);
+	/* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
+	ret = __gsi_channel_stop(channel, gsi->version >= IPA_VERSION_4_0);
 	if (ret)
 		return ret;
 
@@ -1042,12 +1043,13 @@ int gsi_channel_suspend(struct gsi *gsi, u32 channel_id, bool stop)
 	return 0;
 }
 
-/* Resume a suspended channel (starting will be requested if STOPPED) */
-int gsi_channel_resume(struct gsi *gsi, u32 channel_id, bool start)
+/* Resume a suspended channel (starting if stopped) */
+int gsi_channel_resume(struct gsi *gsi, u32 channel_id)
 {
 	struct gsi_channel *channel = &gsi->channel[channel_id];
 
-	return __gsi_channel_start(channel, start);
+	/* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
+	return __gsi_channel_start(channel, gsi->version >= IPA_VERSION_4_0);
 }
 
 /**
diff --git a/drivers/net/ipa/gsi.h b/drivers/net/ipa/gsi.h
index 81cd7b07f6e14..97163b58b4ebc 100644
--- a/drivers/net/ipa/gsi.h
+++ b/drivers/net/ipa/gsi.h
@@ -232,8 +232,23 @@ int gsi_channel_stop(struct gsi *gsi, u32 channel_id);
  */
 void gsi_channel_reset(struct gsi *gsi, u32 channel_id, bool doorbell);
 
-int gsi_channel_suspend(struct gsi *gsi, u32 channel_id, bool stop);
-int gsi_channel_resume(struct gsi *gsi, u32 channel_id, bool start);
+/**
+ * gsi_channel_suspend() - Suspend a GSI channel
+ * @gsi:	GSI pointer
+ * @channel_id:	Channel to suspend
+ *
+ * For IPA v4.0+, suspend is implemented by stopping the channel.
+ */
+int gsi_channel_suspend(struct gsi *gsi, u32 channel_id);
+
+/**
+ * gsi_channel_resume() - Resume a suspended GSI channel
+ * @gsi:	GSI pointer
+ * @channel_id:	Channel to resume
+ *
+ * For IPA v4.0+, the stopped channel is started again.
+ */
+int gsi_channel_resume(struct gsi *gsi, u32 channel_id);
 
 /**
  * gsi_init() - Initialize the GSI subsystem
diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 8070d1a1d5dfd..08ee37ae28813 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -1587,7 +1587,6 @@ void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint)
 {
 	struct device *dev = &endpoint->ipa->pdev->dev;
 	struct gsi *gsi = &endpoint->ipa->gsi;
-	bool stop_channel;
 	int ret;
 
 	if (!(endpoint->ipa->enabled & BIT(endpoint->endpoint_id)))
@@ -1598,11 +1597,7 @@ void ipa_endpoint_suspend_one(struct ipa_endpoint *endpoint)
 		(void)ipa_endpoint_program_suspend(endpoint, true);
 	}
 
-	/* Starting with IPA v4.0, endpoints are suspended by stopping the
-	 * underlying GSI channel rather than using endpoint suspend mode.
-	 */
-	stop_channel = endpoint->ipa->version >= IPA_VERSION_4_0;
-	ret = gsi_channel_suspend(gsi, endpoint->channel_id, stop_channel);
+	ret = gsi_channel_suspend(gsi, endpoint->channel_id);
 	if (ret)
 		dev_err(dev, "error %d suspending channel %u\n", ret,
 			endpoint->channel_id);
@@ -1612,7 +1607,6 @@ void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint)
 {
 	struct device *dev = &endpoint->ipa->pdev->dev;
 	struct gsi *gsi = &endpoint->ipa->gsi;
-	bool start_channel;
 	int ret;
 
 	if (!(endpoint->ipa->enabled & BIT(endpoint->endpoint_id)))
@@ -1621,11 +1615,7 @@ void ipa_endpoint_resume_one(struct ipa_endpoint *endpoint)
 	if (!endpoint->toward_ipa)
 		(void)ipa_endpoint_program_suspend(endpoint, false);
 
-	/* Starting with IPA v4.0, the underlying GSI channel must be
-	 * restarted for resume.
-	 */
-	start_channel = endpoint->ipa->version >= IPA_VERSION_4_0;
-	ret = gsi_channel_resume(gsi, endpoint->channel_id, start_channel);
+	ret = gsi_channel_resume(gsi, endpoint->channel_id);
 	if (ret)
 		dev_err(dev, "error %d resuming channel %u\n", ret,
 			endpoint->channel_id);
-- 
2.27.0


  reply	other threads:[~2021-08-03 14:01 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 14:00 [PATCH net-next 0/6] net: ipa: prepare GSI interrupts for runtime PM Alex Elder
2021-08-03 14:00 ` Alex Elder [this message]
2021-08-03 14:00 ` [PATCH net-next 2/6] net: ipa: move version check for channel suspend/resume Alex Elder
2021-08-03 14:01 ` [PATCH net-next 3/6] net: ipa: move some GSI setup functions Alex Elder
2021-08-03 14:01 ` [PATCH net-next 4/6] net: ipa: have gsi_irq_setup() return an error code Alex Elder
2021-08-03 14:01 ` [PATCH net-next 5/6] net: ipa: move gsi_irq_init() code into setup Alex Elder
2021-08-03 14:01 ` [PATCH net-next 6/6] net: ipa: disable GSI interrupts while suspended Alex Elder
2021-08-04  9:40 ` [PATCH net-next 0/6] net: ipa: prepare GSI interrupts for runtime PM patchwork-bot+netdevbpf

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210803140103.1012697-2-elder@linaro.org \
    --to=elder@linaro.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=cpratapa@codeaurora.org \
    --cc=davem@davemloft.net \
    --cc=elder@kernel.org \
    --cc=evgreen@chromium.org \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=subashab@codeaurora.org \
    --subject='Re: [PATCH net-next 1/6] net: ipa: use gsi->version for channel suspend/resume' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).