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 2/6] net: ipa: move version check for channel suspend/resume
Date: Tue, 3 Aug 2021 09:00:59 -0500 [thread overview]
Message-ID: <20210803140103.1012697-3-elder@linaro.org> (raw)
In-Reply-To: <20210803140103.1012697-1-elder@linaro.org>
Change the Boolean flags passed to __gsi_channel_start() and
__gsi_channel_stop() so they represent whether the request is being
made to implement suspend (versus stop) or resume (versus start).
Then stop or start the channel for suspend/resume requests only if
the hardware version indicates it should be done.
Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/gsi.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index e143deddb7c09..5c5a2571d2faf 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -920,12 +920,13 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell)
/* All done! */
}
-static int __gsi_channel_start(struct gsi_channel *channel, bool start)
+static int __gsi_channel_start(struct gsi_channel *channel, bool resume)
{
struct gsi *gsi = channel->gsi;
int ret;
- if (!start)
+ /* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
+ if (resume && gsi->version < IPA_VERSION_4_0)
return 0;
mutex_lock(&gsi->mutex);
@@ -947,7 +948,7 @@ int gsi_channel_start(struct gsi *gsi, u32 channel_id)
napi_enable(&channel->napi);
gsi_irq_ieob_enable_one(gsi, channel->evt_ring_id);
- ret = __gsi_channel_start(channel, true);
+ ret = __gsi_channel_start(channel, false);
if (ret) {
gsi_irq_ieob_disable_one(gsi, channel->evt_ring_id);
napi_disable(&channel->napi);
@@ -971,7 +972,7 @@ static int gsi_channel_stop_retry(struct gsi_channel *channel)
return ret;
}
-static int __gsi_channel_stop(struct gsi_channel *channel, bool stop)
+static int __gsi_channel_stop(struct gsi_channel *channel, bool suspend)
{
struct gsi *gsi = channel->gsi;
int ret;
@@ -979,7 +980,8 @@ static int __gsi_channel_stop(struct gsi_channel *channel, bool stop)
/* Wait for any underway transactions to complete before stopping. */
gsi_channel_trans_quiesce(channel);
- if (!stop)
+ /* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
+ if (suspend && gsi->version < IPA_VERSION_4_0)
return 0;
mutex_lock(&gsi->mutex);
@@ -997,7 +999,7 @@ int gsi_channel_stop(struct gsi *gsi, u32 channel_id)
struct gsi_channel *channel = &gsi->channel[channel_id];
int ret;
- ret = __gsi_channel_stop(channel, true);
+ ret = __gsi_channel_stop(channel, false);
if (ret)
return ret;
@@ -1032,8 +1034,7 @@ int gsi_channel_suspend(struct gsi *gsi, u32 channel_id)
struct gsi_channel *channel = &gsi->channel[channel_id];
int ret;
- /* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
- ret = __gsi_channel_stop(channel, gsi->version >= IPA_VERSION_4_0);
+ ret = __gsi_channel_stop(channel, true);
if (ret)
return ret;
@@ -1048,8 +1049,7 @@ int gsi_channel_resume(struct gsi *gsi, u32 channel_id)
{
struct gsi_channel *channel = &gsi->channel[channel_id];
- /* Prior to IPA v4.0 suspend/resume is not implemented by GSI */
- return __gsi_channel_start(channel, gsi->version >= IPA_VERSION_4_0);
+ return __gsi_channel_start(channel, true);
}
/**
--
2.27.0
next prev parent 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 ` [PATCH net-next 1/6] net: ipa: use gsi->version for channel suspend/resume Alex Elder
2021-08-03 14:00 ` Alex Elder [this message]
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
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