[PATCH net-next 1/3] net: ipa: use autosuspend
From: Alex Elder <hidden>
Date: 2021-08-20 16:10:00
Also in:
lkml
Subsystem:
networking drivers, qcom ipa driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Alex Elder, Linus Torvalds
Use runtime power management autosuspend. Up until this point, we only suspended the IPA hardware for system suspend; now we'll suspend it aggressively using runtime power management, setting the initial autosuspend delay to half a second of inactivity. Replace pm_runtime_put() calls with pm_runtime_put_autosuspend(), call pm_runtime_mark_last_busy() before each of those. In places where we're shutting things down, or decrementing power references for errors, use pm_runtime_put_noidle() instead. Finally, remove ipa_runtime_idle(), so the ->runtime_suspend callback will occur if idle. Signed-off-by: Alex Elder <redacted> --- drivers/net/ipa/ipa_clock.c | 15 +++++++-------- drivers/net/ipa/ipa_interrupt.c | 3 ++- drivers/net/ipa/ipa_main.c | 11 ++++++----- drivers/net/ipa/ipa_modem.c | 16 ++++++++++------ drivers/net/ipa/ipa_smp2p.c | 8 ++++++-- drivers/net/ipa/ipa_uc.c | 12 +++++++++--- 6 files changed, 40 insertions(+), 25 deletions(-)
diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
index 149b24da0bcc7..54d684945a7f8 100644
--- a/drivers/net/ipa/ipa_clock.c
+++ b/drivers/net/ipa/ipa_clock.c@@ -32,6 +32,8 @@ * An IPA clock reference must be held for any access to IPA hardware. */ +#define IPA_AUTOSUSPEND_DELAY 500 /* milliseconds */ + /** * struct ipa_interconnect - IPA interconnect information * @path: Interconnect path
@@ -267,11 +269,6 @@ static int ipa_runtime_resume(struct device *dev) return 0; } -static int ipa_runtime_idle(struct device *dev) -{ - return -EAGAIN; -} - static int ipa_suspend(struct device *dev) { struct ipa *ipa = dev_get_drvdata(dev);
@@ -443,7 +440,8 @@ ipa_clock_init(struct device *dev, const struct ipa_clock_data *data) if (ret) goto err_kfree; - pm_runtime_dont_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, IPA_AUTOSUSPEND_DELAY); + pm_runtime_use_autosuspend(dev); pm_runtime_enable(dev); return clock;
@@ -459,9 +457,11 @@ ipa_clock_init(struct device *dev, const struct ipa_clock_data *data) /* Inverse of ipa_clock_init() */ void ipa_clock_exit(struct ipa_clock *clock) { + struct device *dev = clock->dev; struct clk *clk = clock->core; - pm_runtime_disable(clock->dev); + pm_runtime_disable(dev); + pm_runtime_dont_use_autosuspend(dev); ipa_interconnect_exit(clock); kfree(clock); clk_put(clk);
@@ -472,5 +472,4 @@ const struct dev_pm_ops ipa_pm_ops = { .resume = ipa_resume, .runtime_suspend = ipa_runtime_suspend, .runtime_resume = ipa_runtime_resume, - .runtime_idle = ipa_runtime_idle, };
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 3fecaadb4a37e..b35170a93b0fa 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c@@ -116,7 +116,8 @@ static irqreturn_t ipa_isr_thread(int irq, void *dev_id) iowrite32(pending, ipa->reg_virt + offset); } out_power_put: - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); return IRQ_HANDLED; }
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 3969aef6c4370..b4d7534045a1c 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c@@ -766,14 +766,15 @@ static int ipa_probe(struct platform_device *pdev) if (ret) goto err_deconfig; done: - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); return 0; err_deconfig: ipa_deconfig(ipa); err_power_put: - (void)pm_runtime_put(dev); + pm_runtime_put_noidle(dev); ipa_modem_exit(ipa); err_table_exit: ipa_table_exit(ipa);
@@ -797,9 +798,10 @@ static int ipa_remove(struct platform_device *pdev) { struct ipa *ipa = dev_get_drvdata(&pdev->dev); struct ipa_clock *clock = ipa->clock; + struct device *dev = &pdev->dev; int ret; - ret = pm_runtime_get_sync(&pdev->dev); + ret = pm_runtime_get_sync(dev); if (WARN_ON(ret < 0)) goto out_power_put;
@@ -818,8 +820,7 @@ static int ipa_remove(struct platform_device *pdev) ipa_deconfig(ipa); out_power_put: - (void)pm_runtime_put(&pdev->dev); - + pm_runtime_put_noidle(dev); ipa_modem_exit(ipa); ipa_table_exit(ipa); ipa_endpoint_exit(ipa);
diff --git a/drivers/net/ipa/ipa_modem.c b/drivers/net/ipa/ipa_modem.c
index 11f0204a96957..18b1f8d6d729a 100644
--- a/drivers/net/ipa/ipa_modem.c
+++ b/drivers/net/ipa/ipa_modem.c@@ -67,14 +67,15 @@ static int ipa_open(struct net_device *netdev) netif_start_queue(netdev); - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); return 0; err_disable_tx: ipa_endpoint_disable_one(ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]); err_power_put: - (void)pm_runtime_put(dev); + pm_runtime_put_noidle(dev); return ret; }
@@ -97,7 +98,8 @@ static int ipa_stop(struct net_device *netdev) ipa_endpoint_disable_one(ipa->name_map[IPA_ENDPOINT_AP_MODEM_RX]); ipa_endpoint_disable_one(ipa->name_map[IPA_ENDPOINT_AP_MODEM_TX]); out_power_put: - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); return 0; }
@@ -145,7 +147,7 @@ ipa_start_xmit(struct sk_buff *skb, struct net_device *netdev) */ ipa_power_modem_queue_stop(ipa); - (void)pm_runtime_put(dev); + pm_runtime_put_noidle(dev); return NETDEV_TX_BUSY; }
@@ -154,7 +156,8 @@ ipa_start_xmit(struct sk_buff *skb, struct net_device *netdev) ret = ipa_endpoint_skb_tx(endpoint, skb); - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); if (ret) { if (ret != -E2BIG)
@@ -398,7 +401,8 @@ static void ipa_modem_crashed(struct ipa *ipa) dev_err(dev, "error %d zeroing modem memory regions\n", ret); out_power_put: - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); } static int ipa_modem_notify(struct notifier_block *nb, unsigned long action,
diff --git a/drivers/net/ipa/ipa_smp2p.c b/drivers/net/ipa/ipa_smp2p.c
index f6e2061cd391c..7e1cef0fc67cb 100644
--- a/drivers/net/ipa/ipa_smp2p.c
+++ b/drivers/net/ipa/ipa_smp2p.c@@ -174,7 +174,8 @@ static irqreturn_t ipa_smp2p_modem_setup_ready_isr(int irq, void *dev_id) WARN(ret != 0, "error %d from ipa_setup()\n", ret); out_power_put: - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); out_mutex_unlock: mutex_unlock(&smp2p->mutex);
@@ -211,10 +212,13 @@ static void ipa_smp2p_irq_exit(struct ipa_smp2p *smp2p, u32 irq) /* Drop the clock reference if it was taken in ipa_smp2p_notify() */ static void ipa_smp2p_clock_release(struct ipa *ipa) { + struct device *dev = &ipa->pdev->dev; + if (!ipa->smp2p->clock_on) return; - (void)pm_runtime_put(&ipa->pdev->dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); ipa->smp2p->clock_on = false; }
diff --git a/drivers/net/ipa/ipa_uc.c b/drivers/net/ipa/ipa_uc.c
index a0bdd25b65b4f..de04385270195 100644
--- a/drivers/net/ipa/ipa_uc.c
+++ b/drivers/net/ipa/ipa_uc.c@@ -154,7 +154,8 @@ static void ipa_uc_response_hdlr(struct ipa *ipa, enum ipa_irq_id irq_id) case IPA_UC_RESPONSE_INIT_COMPLETED: if (ipa->uc_clocked) { ipa->uc_loaded = true; - (void)pm_runtime_put(dev); + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); ipa->uc_clocked = false; } else { dev_warn(dev, "unexpected init_completed response\n");
@@ -179,10 +180,15 @@ void ipa_uc_config(struct ipa *ipa) /* Inverse of ipa_uc_config() */ void ipa_uc_deconfig(struct ipa *ipa) { + struct device *dev = &ipa->pdev->dev; + ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_1); ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_0); - if (ipa->uc_clocked) - (void)pm_runtime_put(&ipa->pdev->dev); + if (!ipa->uc_clocked) + return; + + pm_runtime_mark_last_busy(dev); + (void)pm_runtime_put_autosuspend(dev); } /* Take a proxy clock reference for the microcontroller */
--
2.27.0