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immortalwrt/target/linux/generic/backport-5.15/621-v5.19-10-net-wwan-t7xx-Runtime-PM.patch
Tianling Shen 6ff8a2e28f
kernel: backport MTK T7XX WWAN driver support 
fbafc3e621/Documentation/networking/device_drivers/wwan/t7xx.rst

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
2023-12-28 10:36:09 +08:00

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9.1 KiB
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From d10b3a695ba0227faf249537402bb72b283a36b8 Mon Sep 17 00:00:00 2001
From: Haijun Liu <haijun.liu@mediatek.com>
Date: Fri, 6 May 2022 11:13:08 -0700
Subject: [PATCH] net: wwan: t7xx: Runtime PM
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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 Liu <haijun.liu@mediatek.com>
Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@intel.com>
Co-developed-by: Eliot Lee <eliot.lee@intel.com>
Signed-off-by: Eliot Lee <eliot.lee@intel.com>
Signed-off-by: Ricardo Martinez <ricardo.martinez@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/wwan/t7xx/t7xx_hif_cldma.c | 14 ++++++++++++++
drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c | 17 +++++++++++++++++
drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c | 15 +++++++++++++++
drivers/net/wwan/t7xx/t7xx_pci.c | 22 ++++++++++++++++++++++
4 files changed, 68 insertions(+)
--- a/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_cldma.c
@@ -33,6 +33,7 @@
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/pci.h>
+#include <linux/pm_runtime.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
@@ -251,6 +252,8 @@ static void t7xx_cldma_rx_done(struct wo
t7xx_cldma_clear_ip_busy(&md_ctrl->hw_info);
t7xx_cldma_hw_irq_en_txrx(&md_ctrl->hw_info, queue->index, MTK_RX);
t7xx_cldma_hw_irq_en_eq(&md_ctrl->hw_info, queue->index, MTK_RX);
+ pm_runtime_mark_last_busy(md_ctrl->dev);
+ pm_runtime_put_autosuspend(md_ctrl->dev);
}
static int t7xx_cldma_gpd_tx_collect(struct cldma_queue *queue)
@@ -360,6 +363,9 @@ static void t7xx_cldma_tx_done(struct wo
t7xx_cldma_hw_irq_en_txrx(hw_info, queue->index, MTK_TX);
}
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 t7xx_cldma_ring_free(struct cldma_ctrl *md_ctrl,
@@ -568,6 +574,7 @@ static void t7xx_cldma_irq_work_cb(struc
if (l2_tx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) {
for_each_set_bit(i, &l2_tx_int, L2_INT_BIT_COUNT) {
if (i < CLDMA_TXQ_NUM) {
+ pm_runtime_get(md_ctrl->dev);
t7xx_cldma_hw_irq_dis_eq(hw_info, i, MTK_TX);
t7xx_cldma_hw_irq_dis_txrx(hw_info, i, MTK_TX);
queue_work(md_ctrl->txq[i].worker,
@@ -592,6 +599,7 @@ static void t7xx_cldma_irq_work_cb(struc
if (l2_rx_int & (TXRX_STATUS_BITMASK | EMPTY_STATUS_BITMASK)) {
l2_rx_int |= l2_rx_int >> CLDMA_RXQ_NUM;
for_each_set_bit(i, &l2_rx_int, CLDMA_RXQ_NUM) {
+ pm_runtime_get(md_ctrl->dev);
t7xx_cldma_hw_irq_dis_eq(hw_info, i, MTK_RX);
t7xx_cldma_hw_irq_dis_txrx(hw_info, i, MTK_RX);
queue_work(md_ctrl->rxq[i].worker, &md_ctrl->rxq[i].cldma_work);
@@ -922,6 +930,10 @@ int t7xx_cldma_send_skb(struct cldma_ctr
if (qno >= CLDMA_TXQ_NUM)
return -EINVAL;
+ ret = pm_runtime_resume_and_get(md_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return ret;
+
queue = &md_ctrl->txq[qno];
spin_lock_irqsave(&md_ctrl->cldma_lock, flags);
@@ -965,6 +977,8 @@ int t7xx_cldma_send_skb(struct cldma_ctr
} while (!ret);
allow_sleep:
+ pm_runtime_mark_last_busy(md_ctrl->dev);
+ pm_runtime_put_autosuspend(md_ctrl->dev);
return ret;
}
--- a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_rx.c
@@ -32,6 +32,7 @@
#include <linux/minmax.h>
#include <linux/mm.h>
#include <linux/netdevice.h>
+#include <linux/pm_runtime.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
@@ -910,6 +911,7 @@ static void t7xx_dpmaif_rxq_work(struct
{
struct dpmaif_rx_queue *rxq = container_of(work, struct dpmaif_rx_queue, dpmaif_rxq_work);
struct dpmaif_ctrl *dpmaif_ctrl = rxq->dpmaif_ctrl;
+ int ret;
atomic_set(&rxq->rx_processing, 1);
/* Ensure rx_processing is changed to 1 before actually begin RX flow */
@@ -921,7 +923,14 @@ static void t7xx_dpmaif_rxq_work(struct
return;
}
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return;
+
t7xx_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);
}
@@ -1123,11 +1132,19 @@ static void t7xx_dpmaif_bat_release_work
{
struct dpmaif_ctrl *dpmaif_ctrl = container_of(work, struct dpmaif_ctrl, bat_release_work);
struct dpmaif_rx_queue *rxq;
+ int ret;
+
+ 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];
t7xx_dpmaif_bat_release_and_add(rxq);
t7xx_dpmaif_frag_bat_release_and_add(rxq);
+
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
int t7xx_dpmaif_bat_rel_wq_alloc(struct dpmaif_ctrl *dpmaif_ctrl)
--- a/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c
+++ b/drivers/net/wwan/t7xx/t7xx_hif_dpmaif_tx.c
@@ -28,6 +28,7 @@
#include <linux/list.h>
#include <linux/minmax.h>
#include <linux/netdevice.h>
+#include <linux/pm_runtime.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
@@ -161,6 +162,10 @@ static void t7xx_dpmaif_tx_done(struct w
struct dpmaif_hw_info *hw_info;
int ret;
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return;
+
hw_info = &dpmaif_ctrl->hw_info;
ret = t7xx_dpmaif_tx_release(dpmaif_ctrl, txq->index, txq->drb_size_cnt);
if (ret == -EAGAIN ||
@@ -174,6 +179,9 @@ static void t7xx_dpmaif_tx_done(struct w
t7xx_dpmaif_clr_ip_busy_sts(hw_info);
t7xx_dpmaif_unmask_ulq_intr(hw_info, txq->index);
}
+
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
static void t7xx_setup_msg_drb(struct dpmaif_ctrl *dpmaif_ctrl, unsigned int q_num,
@@ -423,6 +431,7 @@ static void t7xx_do_tx_hw_push(struct dp
static int t7xx_dpmaif_tx_hw_push_thread(void *arg)
{
struct dpmaif_ctrl *dpmaif_ctrl = arg;
+ int ret;
while (!kthread_should_stop()) {
if (t7xx_tx_lists_are_all_empty(dpmaif_ctrl) ||
@@ -437,7 +446,13 @@ static int t7xx_dpmaif_tx_hw_push_thread
break;
}
+ ret = pm_runtime_resume_and_get(dpmaif_ctrl->dev);
+ if (ret < 0 && ret != -EACCES)
+ return ret;
+
t7xx_do_tx_hw_push(dpmaif_ctrl);
+ pm_runtime_mark_last_busy(dpmaif_ctrl->dev);
+ pm_runtime_put_autosuspend(dpmaif_ctrl->dev);
}
return 0;
--- a/drivers/net/wwan/t7xx/t7xx_pci.c
+++ b/drivers/net/wwan/t7xx/t7xx_pci.c
@@ -31,6 +31,7 @@
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/pm.h>
+#include <linux/pm_runtime.h>
#include <linux/pm_wakeup.h>
#include "t7xx_mhccif.h"
@@ -44,6 +45,7 @@
#define T7XX_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
@@ -82,6 +84,8 @@ static int t7xx_pci_pm_init(struct t7xx_
DPM_FLAG_NO_DIRECT_COMPLETE);
iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + DISABLE_ASPM_LOWPWR);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, PM_AUTOSUSPEND_MS);
+ pm_runtime_use_autosuspend(&pdev->dev);
return t7xx_wait_pm_config(t7xx_dev);
}
@@ -96,6 +100,8 @@ void t7xx_pci_pm_init_late(struct t7xx_p
D2H_INT_RESUME_ACK_AP);
iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + ENABLE_ASPM_LOWPWR);
atomic_set(&t7xx_dev->md_pm_state, MTK_PM_RESUMED);
+
+ pm_runtime_put_noidle(&t7xx_dev->pdev->dev);
}
static int t7xx_pci_pm_reinit(struct t7xx_pci_dev *t7xx_dev)
@@ -104,6 +110,9 @@ static int t7xx_pci_pm_reinit(struct t7x
* so just roll back PM setting to the init setting.
*/
atomic_set(&t7xx_dev->md_pm_state, MTK_PM_INIT);
+
+ pm_runtime_get_noresume(&t7xx_dev->pdev->dev);
+
iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + DISABLE_ASPM_LOWPWR);
return t7xx_wait_pm_config(t7xx_dev);
}
@@ -403,6 +412,7 @@ static int __t7xx_pci_pm_resume(struct p
t7xx_dev->rgu_pci_irq_en = true;
t7xx_pcie_mac_set_int(t7xx_dev, SAP_RGU_INT);
iowrite32(T7XX_L1_BIT(0), IREG_BASE(t7xx_dev) + ENABLE_ASPM_LOWPWR);
+ pm_runtime_mark_last_busy(&pdev->dev);
atomic_set(&t7xx_dev->md_pm_state, MTK_PM_RESUMED);
return ret;
@@ -439,6 +449,16 @@ static int t7xx_pci_pm_thaw(struct devic
return __t7xx_pci_pm_resume(to_pci_dev(dev), false);
}
+static int t7xx_pci_pm_runtime_suspend(struct device *dev)
+{
+ return __t7xx_pci_pm_suspend(to_pci_dev(dev));
+}
+
+static int t7xx_pci_pm_runtime_resume(struct device *dev)
+{
+ return __t7xx_pci_pm_resume(to_pci_dev(dev), true);
+}
+
static const struct dev_pm_ops t7xx_pci_pm_ops = {
.suspend = t7xx_pci_pm_suspend,
.resume = t7xx_pci_pm_resume,
@@ -448,6 +468,8 @@ static const struct dev_pm_ops t7xx_pci_
.poweroff = t7xx_pci_pm_suspend,
.restore = t7xx_pci_pm_resume,
.restore_noirq = t7xx_pci_pm_resume_noirq,
+ .runtime_suspend = t7xx_pci_pm_runtime_suspend,
+ .runtime_resume = t7xx_pci_pm_runtime_resume
};
static int t7xx_request_irq(struct pci_dev *pdev)
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