2020-05-01 10:37:31

by Lorenzo Bianconi

[permalink] [raw]
Subject: [PATCH 5/7] mt76: mt7615: introduce PM support

Introduce suspend/resume to mt7615e driver

Co-developed-by: Wan-Feng Jiang <[email protected]>
Signed-off-by: Wan-Feng Jiang <[email protected]>
Co-developed-by: Soul Huang <[email protected]>
Signed-off-by: Soul Huang <[email protected]>
Co-developed-by: Sean Wang <[email protected]>
Signed-off-by: Sean Wang <[email protected]>
Signed-off-by: Lorenzo Bianconi <[email protected]>
---
.../net/wireless/mediatek/mt76/mt7615/dma.c | 37 ++++++
.../net/wireless/mediatek/mt76/mt7615/mac.c | 4 +-
.../net/wireless/mediatek/mt76/mt7615/mcu.c | 6 +-
.../net/wireless/mediatek/mt76/mt7615/mmio.c | 4 +
.../wireless/mediatek/mt76/mt7615/mt7615.h | 5 +
.../net/wireless/mediatek/mt76/mt7615/pci.c | 107 ++++++++++++++++++
.../net/wireless/mediatek/mt76/mt7615/regs.h | 28 ++++-
7 files changed, 185 insertions(+), 6 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
index 0b1fbddd1c3f..5a124610d4af 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/dma.c
@@ -130,6 +130,43 @@ static int mt7615_poll_tx(struct napi_struct *napi, int budget)
return 0;
}

+int mt7615_wait_pdma_busy(struct mt7615_dev *dev)
+{
+ struct mt76_dev *mdev = &dev->mt76;
+
+ if (!is_mt7663(mdev)) {
+ u32 mask = MT_PDMA_TX_BUSY | MT_PDMA_RX_BUSY;
+ u32 reg = mt7615_reg_map(dev, MT_PDMA_BUSY);
+
+ if (!mt76_poll_msec(dev, reg, mask, 0, 1000)) {
+ dev_err(mdev->dev, "PDMA engine busy\n");
+ return -EIO;
+ }
+
+ return 0;
+ }
+
+ if (!mt76_poll_msec(dev, MT_PDMA_BUSY_STATUS,
+ MT_PDMA_TX_IDX_BUSY, 0, 1000)) {
+ dev_err(mdev->dev, "PDMA engine tx busy\n");
+ return -EIO;
+ }
+
+ if (!mt76_poll_msec(dev, MT_PSE_PG_INFO,
+ MT_PSE_SRC_CNT, 0, 1000)) {
+ dev_err(mdev->dev, "PSE engine busy\n");
+ return -EIO;
+ }
+
+ if (!mt76_poll_msec(dev, MT_PDMA_BUSY_STATUS,
+ MT_PDMA_BUSY_IDX, 0, 1000)) {
+ dev_err(mdev->dev, "PDMA engine busy\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
static void mt7622_dma_sched_init(struct mt7615_dev *dev)
{
u32 reg = mt7615_reg_map(dev, MT_DMASHDL_BASE);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index e7a76032caff..b8f86d8fab93 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -1806,8 +1806,7 @@ mt7615_update_beacons(struct mt7615_dev *dev)
mt7615_update_vif_beacon, dev->mt76.phy2->hw);
}

-static void
-mt7615_dma_reset(struct mt7615_dev *dev)
+void mt7615_dma_reset(struct mt7615_dev *dev)
{
int i;

@@ -1826,6 +1825,7 @@ mt7615_dma_reset(struct mt7615_dev *dev)
MT_WPDMA_GLO_CFG_RX_DMA_EN | MT_WPDMA_GLO_CFG_TX_DMA_EN |
MT_WPDMA_GLO_CFG_TX_WRITEBACK_DONE);
}
+EXPORT_SYMBOL_GPL(mt7615_dma_reset);

void mt7615_mac_reset_work(struct work_struct *work)
{
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
index 2d077c18a4b6..22e532aeb3cf 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
@@ -1677,7 +1677,7 @@ static void mt7622_trigger_hif_int(struct mt7615_dev *dev, bool en)
!en * MT_INFRACFG_MISC_AP2CONN_WAKE);
}

-static int mt7615_driver_own(struct mt7615_dev *dev)
+int mt7615_driver_own(struct mt7615_dev *dev)
{
struct mt76_dev *mdev = &dev->mt76;
u32 addr;
@@ -1697,8 +1697,9 @@ static int mt7615_driver_own(struct mt7615_dev *dev)

return 0;
}
+EXPORT_SYMBOL_GPL(mt7615_driver_own);

-static int mt7615_firmware_own(struct mt7615_dev *dev)
+int mt7615_firmware_own(struct mt7615_dev *dev)
{
u32 addr;

@@ -1717,6 +1718,7 @@ static int mt7615_firmware_own(struct mt7615_dev *dev)

return 0;
}
+EXPORT_SYMBOL_GPL(mt7615_firmware_own);

static int mt7615_load_patch(struct mt7615_dev *dev, u32 addr, const char *name)
{
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mmio.c b/drivers/net/wireless/mediatek/mt76/mt7615/mmio.c
index c9f5b1ce70ae..e670393506f0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mmio.c
@@ -15,6 +15,8 @@ const u32 mt7615e_reg_map[] = {
[MT_ARB_BASE] = 0x20c00,
[MT_HIF_BASE] = 0x04000,
[MT_CSR_BASE] = 0x07000,
+ [MT_PLE_BASE] = 0x08000,
+ [MT_PSE_BASE] = 0x0c000,
[MT_PHY_BASE] = 0x10000,
[MT_CFG_BASE] = 0x20200,
[MT_AGG_BASE] = 0x20a00,
@@ -40,6 +42,8 @@ const u32 mt7663e_reg_map[] = {
[MT_ARB_BASE] = 0x20c00,
[MT_HIF_BASE] = 0x04000,
[MT_CSR_BASE] = 0x07000,
+ [MT_PLE_BASE] = 0x08000,
+ [MT_PSE_BASE] = 0x0c000,
[MT_PHY_BASE] = 0x10000,
[MT_CFG_BASE] = 0x20000,
[MT_AGG_BASE] = 0x22000,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
index 3e6bc3ce914a..be9188e40259 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h
@@ -380,6 +380,7 @@ int mt7615_eeprom_init(struct mt7615_dev *dev, u32 addr);
int mt7615_eeprom_get_power_index(struct mt7615_dev *dev,
struct ieee80211_channel *chan,
u8 chain_idx);
+int mt7615_wait_pdma_busy(struct mt7615_dev *dev);
int mt7615_dma_init(struct mt7615_dev *dev);
void mt7615_dma_cleanup(struct mt7615_dev *dev);
int mt7615_mcu_init(struct mt7615_dev *dev);
@@ -436,6 +437,7 @@ static inline u16 mt7615_wtbl_size(struct mt7615_dev *dev)
return MT7615_WTBL_SIZE;
}

+void mt7615_dma_reset(struct mt7615_dev *dev);
void mt7615_scan_work(struct work_struct *work);
void mt7615_ps_work(struct work_struct *work);
void mt7615_init_txpower(struct mt7615_dev *dev,
@@ -526,6 +528,9 @@ int mt7615_mcu_apply_tx_dpd(struct mt7615_phy *phy);
void m7615_mcu_set_ps_iter(void *priv, u8 *mac, struct ieee80211_vif *vif);
int mt7615_dfs_init_radar_detector(struct mt7615_phy *phy);

+int mt7615_firmware_own(struct mt7615_dev *dev);
+int mt7615_driver_own(struct mt7615_dev *dev);
+
int mt7615_init_debugfs(struct mt7615_dev *dev);
int mt7615_mcu_wait_response(struct mt7615_dev *dev, int cmd, int seq);

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/pci.c b/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
index 0605c908059e..b84eb208c23e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/pci.c
@@ -66,11 +66,118 @@ static void mt7615_pci_remove(struct pci_dev *pdev)
pci_free_irq_vectors(pdev);
}

+static int __maybe_unused mt7615_pci_suspend(struct pci_dev *pdev,
+ pm_message_t state)
+{
+ struct mt76_dev *mdev = pci_get_drvdata(pdev);
+ struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
+ bool hif_suspend;
+ int i, err;
+
+ hif_suspend = !test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
+ mt7615_firmware_offload(dev);
+ if (hif_suspend) {
+ err = mt7615_mcu_set_hif_suspend(dev, true);
+ if (err)
+ return err;
+ }
+
+ napi_disable(&mdev->tx_napi);
+ tasklet_kill(&mdev->tx_tasklet);
+
+ for (i = 0; i < ARRAY_SIZE(mdev->q_rx); i++)
+ napi_disable(&mdev->napi[i]);
+ tasklet_kill(&dev->irq_tasklet);
+
+ mt7615_dma_reset(dev);
+
+ err = mt7615_wait_pdma_busy(dev);
+ if (err)
+ goto restore;
+
+ if (is_mt7663(mdev)) {
+ mt76_set(dev, MT_PDMA_SLP_PROT, MT_PDMA_AXI_SLPPROT_ENABLE);
+ if (!mt76_poll_msec(dev, MT_PDMA_SLP_PROT,
+ MT_PDMA_AXI_SLPPROT_RDY,
+ MT_PDMA_AXI_SLPPROT_RDY, 1000)) {
+ dev_err(mdev->dev, "PDMA sleep protection failed\n");
+ err = -EIO;
+ goto restore;
+ }
+ }
+
+ pci_enable_wake(pdev, pci_choose_state(pdev, state), true);
+ pci_save_state(pdev);
+ err = pci_set_power_state(pdev, pci_choose_state(pdev, state));
+ if (err)
+ goto restore;
+
+ err = mt7615_firmware_own(dev);
+ if (err)
+ goto restore;
+
+ return 0;
+
+restore:
+ for (i = 0; i < ARRAY_SIZE(mdev->q_rx); i++)
+ napi_enable(&mdev->napi[i]);
+ napi_enable(&mdev->tx_napi);
+ if (hif_suspend)
+ mt7615_mcu_set_hif_suspend(dev, false);
+
+ return err;
+}
+
+static int __maybe_unused mt7615_pci_resume(struct pci_dev *pdev)
+{
+ struct mt76_dev *mdev = pci_get_drvdata(pdev);
+ struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
+ bool pdma_reset;
+ int i, err;
+
+ err = mt7615_driver_own(dev);
+ if (err < 0)
+ return err;
+
+ err = pci_set_power_state(pdev, PCI_D0);
+ if (err)
+ return err;
+
+ pci_restore_state(pdev);
+
+ if (is_mt7663(&dev->mt76)) {
+ mt76_clear(dev, MT_PDMA_SLP_PROT, MT_PDMA_AXI_SLPPROT_ENABLE);
+ mt76_wr(dev, MT_PCIE_IRQ_ENABLE, 1);
+ }
+
+ pdma_reset = !mt76_rr(dev, MT_WPDMA_TX_RING0_CTRL0) &&
+ !mt76_rr(dev, MT_WPDMA_TX_RING0_CTRL1);
+ if (pdma_reset)
+ dev_err(mdev->dev, "PDMA engine must be reinitialized\n");
+
+ for (i = 0; i < ARRAY_SIZE(mdev->q_rx); i++) {
+ napi_enable(&mdev->napi[i]);
+ napi_schedule(&mdev->napi[i]);
+ }
+ napi_enable(&mdev->tx_napi);
+ napi_schedule(&mdev->tx_napi);
+
+ if (!test_bit(MT76_STATE_SUSPEND, &dev->mphy.state) &&
+ mt7615_firmware_offload(dev))
+ err = mt7615_mcu_set_hif_suspend(dev, false);
+
+ return err;
+}
+
struct pci_driver mt7615_pci_driver = {
.name = KBUILD_MODNAME,
.id_table = mt7615_pci_device_table,
.probe = mt7615_pci_probe,
.remove = mt7615_pci_remove,
+#ifdef CONFIG_PM
+ .suspend = mt7615_pci_suspend,
+ .resume = mt7615_pci_resume,
+#endif /* CONFIG_PM */
};

MODULE_DEVICE_TABLE(pci, mt7615_pci_device_table);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
index 68d30bcc087a..aee433a9eff6 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/regs.h
@@ -12,6 +12,8 @@ enum mt7615_reg_base {
MT_ARB_BASE,
MT_HIF_BASE,
MT_CSR_BASE,
+ MT_PLE_BASE,
+ MT_PSE_BASE,
MT_PHY_BASE,
MT_CFG_BASE,
MT_AGG_BASE,
@@ -63,6 +65,17 @@ enum mt7615_reg_base {
#define MT_HIF_RST MT_HIF(0x100)
#define MT_HIF_LOGIC_RST_N BIT(4)

+#define MT_PDMA_SLP_PROT MT_HIF(0x154)
+#define MT_PDMA_AXI_SLPPROT_ENABLE BIT(0)
+#define MT_PDMA_AXI_SLPPROT_RDY BIT(16)
+
+#define MT_PDMA_BUSY_STATUS MT_HIF(0x168)
+#define MT_PDMA_TX_IDX_BUSY BIT(2)
+#define MT_PDMA_BUSY_IDX BIT(31)
+
+#define MT_WPDMA_TX_RING0_CTRL0 MT_HIF(0x300)
+#define MT_WPDMA_TX_RING0_CTRL1 MT_HIF(0x304)
+
#define MT7663_MCU_PCIE_REMAP_2_OFFSET GENMASK(15, 0)
#define MT7663_MCU_PCIE_REMAP_2_BASE GENMASK(31, 16)

@@ -138,8 +151,7 @@ enum mt7615_reg_base {
#define MT_CSR(ofs) ((dev)->reg_map[MT_CSR_BASE] + (ofs))
#define MT_CONN_HIF_ON_LPCTL MT_CSR(0x000)

-#define MT_PLE_BASE 0x8000
-#define MT_PLE(ofs) (MT_PLE_BASE + (ofs))
+#define MT_PLE(ofs) ((dev)->reg_map[MT_PLE_BASE] + (ofs))

#define MT_PLE_FL_Q0_CTRL MT_PLE(0x1b0)
#define MT_PLE_FL_Q1_CTRL MT_PLE(0x1b4)
@@ -149,6 +161,14 @@ enum mt7615_reg_base {
#define MT_PLE_AC_QEMPTY(ac, n) MT_PLE(0x300 + 0x10 * (ac) + \
((n) << 2))

+#define MT_PSE(ofs) ((dev)->reg_map[MT_PSE_BASE] + (ofs))
+#define MT_PSE_QUEUE_EMPTY MT_PSE(0x0b4)
+#define MT_HIF_0_EMPTY_MASK BIT(16)
+#define MT_HIF_1_EMPTY_MASK BIT(17)
+#define MT_HIF_ALL_EMPTY_MASK GENMASK(17, 16)
+#define MT_PSE_PG_INFO MT_PSE(0x194)
+#define MT_PSE_SRC_CNT GENMASK(27, 16)
+
#define MT_WF_PHY_BASE ((dev)->reg_map[MT_PHY_BASE])
#define MT_WF_PHY(ofs) (MT_WF_PHY_BASE + (ofs))

@@ -482,6 +502,10 @@ enum mt7615_reg_base {
#define MT_LED_STATUS_ON GENMASK(23, 16)
#define MT_LED_STATUS_DURATION GENMASK(15, 0)

+#define MT_PDMA_BUSY 0x82000504
+#define MT_PDMA_TX_BUSY BIT(0)
+#define MT_PDMA_RX_BUSY BIT(1)
+
#define MT_EFUSE_BASE ((dev)->reg_map[MT_EFUSE_ADDR_BASE])
#define MT_EFUSE_BASE_CTRL 0x000
#define MT_EFUSE_BASE_CTRL_EMPTY BIT(30)
--
2.25.4