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Date: Thu, 21 Oct 2021 13:27:35 -0700
From: Ricardo Martinez <ricardo.martinez@...ux.intel.com>
To: netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Cc: kuba@...nel.org, davem@...emloft.net, johannes@...solutions.net,
ryazanov.s.a@...il.com, loic.poulain@...aro.org,
m.chetan.kumar@...el.com, chandrashekar.devegowda@...el.com,
linuxwwan@...el.com, chiranjeevi.rapolu@...ux.intel.com,
haijun.liu@...iatek.com,
Ricardo Martinez <ricardo.martinez@...ux.intel.com>
Subject: [PATCH 11/14] net: wwan: t7xx: Runtime PM
Enables runtime power management callbacks including runtime_suspend
and runtime_resume. Autosuspend is used to prevent overhead by frequent
wake-ups.
Signed-off-by: Haijun Lio <haijun.liu@...iatek.com>
Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@...el.com>
Signed-off-by: Ricardo Martinez <ricardo.martinez@...ux.intel.com>
---
drivers/net/wwan/t7xx/t7xx_hif_cldma.c | 13 +++++++++++++
drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c | 16 ++++++++++++++++
drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c | 15 +++++++++++++++
drivers/net/wwan/t7xx/t7xx_pci.c | 21 +++++++++++++++++++++
4 files changed, 65 insertions(+)
diff --git a/drivers/net/wwan/t7xx/t7xx_hif_cldma.c b/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
index 0f15f9283eca..358b4727f7db 100644
--- a/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
#include <linux/skbuff.h>
#include "t7xx_common.h"
@@ -300,6 +301,8 @@ static void cldma_rx_done(struct work_struct *work)
/* enable RX_DONE && EMPTY interrupt */
cldma_hw_dismask_txrxirq(&md_ctrl->hw_info, queue->index, true);
cldma_hw_dismask_eqirq(&md_ctrl->hw_info, queue->index, true);
+ pm_runtime_mark_last_busy(md_ctrl->dev);
+ pm_runtime_put_autosuspend(md_ctrl->dev);
}
static int cldma_gpd_tx_collect(struct cldma_queue *queue)
@@ -441,6 +444,8 @@ static void cldma_tx_done(struct work_struct *work)
}
spin_unlock_irqrestore(&md_ctrl->cldma_lock, flags);
+ pm_runtime_mark_last_busy(md_ctrl->dev);
+ pm_runtime_put_autosuspend(md_ctrl->dev);
}
static void cldma_ring_free(struct cldma_ctrl *md_ctrl,
@@ -664,6 +669,7 @@ static void cldma_irq_work_cb(struct cldma_ctrl *md_ctrl)
if (l2_tx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) {
for (i = 0; i < CLDMA_TXQ_NUM; i++) {
if (l2_tx_int & BIT(i)) {
+ pm_runtime_get(md_ctrl->dev);
/* disable TX_DONE interrupt */
cldma_hw_mask_eqirq(hw_info, i, false);
cldma_hw_mask_txrxirq(hw_info, i, false);
@@ -692,6 +698,7 @@ static void cldma_irq_work_cb(struct cldma_ctrl *md_ctrl)
if (l2_rx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) {
for (i = 0; i < CLDMA_RXQ_NUM; i++) {
if (l2_rx_int & (BIT(i) | EQ_STA_BIT(i))) {
+ pm_runtime_get(md_ctrl->dev);
/* disable RX_DONE and QUEUE_EMPTY interrupt */
cldma_hw_mask_eqirq(hw_info, i, true);
cldma_hw_mask_txrxirq(hw_info, i, true);
@@ -1123,8 +1130,12 @@ int cldma_send_skb(enum cldma_id hif_id, int qno, struct sk_buff *skb, bool skb_
struct cldma_queue *queue;
unsigned long flags;
int ret = 0;
+ int val;
md_ctrl = md_cd_get(hif_id);
+ val = pm_runtime_resume_and_get(md_ctrl->dev);
+ if (val < 0 && val != -EACCES)
+ return val;
if (qno >= CLDMA_TXQ_NUM) {
ret = -EINVAL;
@@ -1189,6 +1200,8 @@ int cldma_send_skb(enum cldma_id hif_id, int qno, struct sk_buff *skb, bool skb_
} while (!ret);
exit:
+ pm_runtime_mark_last_busy(md_ctrl->dev);
+ pm_runtime_put_autosuspend(md_ctrl->dev);
return ret;
}
diff --git a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c
index a902f1ffa4c2..1c29e5576959 100644
--- a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c
@@ -13,6 +13,7 @@
#include <linux/kthread.h>
#include <linux/list.h>
#include <linux/mm.h>
+#include <linux/pm_runtime.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@@ -1030,6 +1031,7 @@ static void dpmaif_rxq_work(struct work_struct *work)
{
struct dpmaif_ctrl *dpmaif_ctrl;
struct dpmaif_rx_queue *rxq;
+ int ret;
rxq = container_of(work, struct dpmaif_rx_queue, dpmaif_rxq_work);
dpmaif_ctrl = rxq->dpmaif_ctrl;
@@ -1044,8 +1046,14 @@ static void dpmaif_rxq_work(struct work_struct *work)
return;
}
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return;
+
dpmaif_do_rx(dpmaif_ctrl, rxq);
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
atomic_set(&rxq->rx_processing, 0);
}
@@ -1408,9 +1416,14 @@ static void dpmaif_bat_release_work(struct work_struct *work)
{
struct dpmaif_ctrl *dpmaif_ctrl;
struct dpmaif_rx_queue *rxq;
+ int ret;
dpmaif_ctrl = container_of(work, struct dpmaif_ctrl, bat_release_work);
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return;
+
/* ALL RXQ use one BAT table, so choose DPF_RX_QNO_DFT */
rxq = &dpmaif_ctrl->rxq[DPF_RX_QNO_DFT];
@@ -1418,6 +1431,9 @@ static void dpmaif_bat_release_work(struct work_struct *work)
dpmaif_dl_pkt_bat_release_and_add(rxq);
/* frag BAT release and add */
dpmaif_dl_frag_bat_release_and_add(rxq);
+
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
int dpmaif_bat_release_work_alloc(struct dpmaif_ctrl *dpmaif_ctrl)
diff --git a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c
index 70f1547fbaff..afb53ed12b12 100644
--- a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/list.h>
+#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
#include "t7xx_common.h"
@@ -159,6 +160,10 @@ static void dpmaif_tx_done(struct work_struct *work)
txq = container_of(work, struct dpmaif_tx_queue, dpmaif_tx_work);
dpmaif_ctrl = txq->dpmaif_ctrl;
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return;
+
ret = dpmaif_tx_release(dpmaif_ctrl, txq->index, txq->drb_size_cnt);
if (ret == -EAGAIN ||
(dpmaif_hw_check_clr_ul_done_status(&dpmaif_ctrl->hif_hw_info, txq->index) &&
@@ -171,6 +176,9 @@ static void dpmaif_tx_done(struct work_struct *work)
dpmaif_clr_ip_busy_sts(&dpmaif_ctrl->hif_hw_info);
dpmaif_unmask_ulq_interrupt(dpmaif_ctrl, txq->index);
}
+
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
static void set_drb_msg(struct dpmaif_ctrl *dpmaif_ctrl,
@@ -505,6 +513,7 @@ static void do_tx_hw_push(struct dpmaif_ctrl *dpmaif_ctrl)
static int dpmaif_tx_hw_push_thread(void *arg)
{
struct dpmaif_ctrl *dpmaif_ctrl;
+ int ret;
dpmaif_ctrl = arg;
while (!kthread_should_stop()) {
@@ -520,7 +529,13 @@ static int dpmaif_tx_hw_push_thread(void *arg)
if (kthread_should_stop())
break;
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return ret;
+
do_tx_hw_push(dpmaif_ctrl);
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
return 0;
diff --git a/drivers/net/wwan/t7xx/t7xx_pci.c b/drivers/net/wwan/t7xx/t7xx_pci.c
index 788bd6db8bc5..260fe87ea631 100644
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pci.h>
+#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
#include "t7xx_mhccif.h"
@@ -25,6 +26,7 @@
#define PCI_EREG_BASE 2
#define PM_ACK_TIMEOUT_MS 1500
+#define PM_AUTOSUSPEND_MS 20000
#define PM_RESOURCE_POLL_TIMEOUT_US 10000
#define PM_RESOURCE_POLL_STEP_US 100
@@ -69,6 +71,8 @@ static int mtk_pci_pm_init(struct mtk_pci_dev *mtk_dev)
atomic_set(&mtk_dev->md_pm_state, MTK_PM_INIT);
iowrite32(L1_DISABLE_BIT(0), IREG_BASE(mtk_dev) + DIS_ASPM_LOWPWR_SET_0);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, PM_AUTOSUSPEND_MS);
+ pm_runtime_use_autosuspend(&pdev->dev);
return mtk_wait_pm_config(mtk_dev);
}
@@ -83,6 +87,8 @@ void mtk_pci_pm_init_late(struct mtk_pci_dev *mtk_dev)
D2H_INT_RESUME_ACK_AP);
iowrite32(L1_DISABLE_BIT(0), IREG_BASE(mtk_dev) + DIS_ASPM_LOWPWR_CLR_0);
atomic_set(&mtk_dev->md_pm_state, MTK_PM_RESUMED);
+
+ pm_runtime_put_noidle(&mtk_dev->pdev->dev);
}
static int mtk_pci_pm_reinit(struct mtk_pci_dev *mtk_dev)
@@ -92,6 +98,8 @@ static int mtk_pci_pm_reinit(struct mtk_pci_dev *mtk_dev)
*/
atomic_set(&mtk_dev->md_pm_state, MTK_PM_INIT);
+ pm_runtime_get_noresume(&mtk_dev->pdev->dev);
+
iowrite32(L1_DISABLE_BIT(0), IREG_BASE(mtk_dev) + DIS_ASPM_LOWPWR_SET_0);
return mtk_wait_pm_config(mtk_dev);
}
@@ -396,6 +404,7 @@ static int __mtk_pci_pm_resume(struct pci_dev *pdev, bool state_check)
mtk_dev->rgu_pci_irq_en = true;
mtk_pcie_mac_set_int(mtk_dev, SAP_RGU_INT);
iowrite32(L1_DISABLE_BIT(0), IREG_BASE(mtk_dev) + DIS_ASPM_LOWPWR_CLR_0);
+ pm_runtime_mark_last_busy(&pdev->dev);
atomic_set(&mtk_dev->md_pm_state, MTK_PM_RESUMED);
return ret;
@@ -437,6 +446,16 @@ static int mtk_pci_pm_thaw(struct device *dev)
return __mtk_pci_pm_resume(to_pci_dev(dev), false);
}
+static int mtk_pci_pm_runtime_suspend(struct device *dev)
+{
+ return __mtk_pci_pm_suspend(to_pci_dev(dev));
+}
+
+static int mtk_pci_pm_runtime_resume(struct device *dev)
+{
+ return __mtk_pci_pm_resume(to_pci_dev(dev), true);
+}
+
static const struct dev_pm_ops mtk_pci_pm_ops = {
.suspend = mtk_pci_pm_suspend,
.resume = mtk_pci_pm_resume,
@@ -446,6 +465,8 @@ static const struct dev_pm_ops mtk_pci_pm_ops = {
.poweroff = mtk_pci_pm_suspend,
.restore = mtk_pci_pm_resume,
.restore_noirq = mtk_pci_pm_resume_noirq,
+ .runtime_suspend = mtk_pci_pm_runtime_suspend,
+ .runtime_resume = mtk_pci_pm_runtime_resume
};
static int mtk_request_irq(struct pci_dev *pdev)
--
2.17.1
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