From d39b52e31aa641c79d0a1177f9d02e71d1b7fd64 Mon Sep 17 00:00:00 2001 From: Sean Wang Date: Wed, 15 Jul 2020 14:46:30 +0200 Subject: mt76: introduce mt76_sdio module Introduce mt76_sdio module as common layer to add mt7663s support Co-developed-by: Lorenzo Bianconi Signed-off-by: Lorenzo Bianconi Signed-off-by: Sean Wang Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/Kconfig | 4 + drivers/net/wireless/mediatek/mt76/Makefile | 2 + drivers/net/wireless/mediatek/mt76/mac80211.c | 6 +- drivers/net/wireless/mediatek/mt76/mt76.h | 30 ++ .../net/wireless/mediatek/mt76/mt7615/usb_sdio.c | 5 +- drivers/net/wireless/mediatek/mt76/sdio.c | 363 +++++++++++++++++++++ 6 files changed, 408 insertions(+), 2 deletions(-) create mode 100644 drivers/net/wireless/mediatek/mt76/sdio.c (limited to 'drivers/net') diff --git a/drivers/net/wireless/mediatek/mt76/Kconfig b/drivers/net/wireless/mediatek/mt76/Kconfig index 41533a0e1720..31015d2a8e7d 100644 --- a/drivers/net/wireless/mediatek/mt76/Kconfig +++ b/drivers/net/wireless/mediatek/mt76/Kconfig @@ -12,6 +12,10 @@ config MT76_USB tristate depends on MT76_CORE +config MT76_SDIO + tristate + depends on MT76_CORE + config MT76x02_LIB tristate select MT76_CORE diff --git a/drivers/net/wireless/mediatek/mt76/Makefile b/drivers/net/wireless/mediatek/mt76/Makefile index 949b3c8ffa1b..e53584db0756 100644 --- a/drivers/net/wireless/mediatek/mt76/Makefile +++ b/drivers/net/wireless/mediatek/mt76/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_MT76_CORE) += mt76.o obj-$(CONFIG_MT76_USB) += mt76-usb.o +obj-$(CONFIG_MT76_SDIO) += mt76-sdio.o obj-$(CONFIG_MT76x02_LIB) += mt76x02-lib.o obj-$(CONFIG_MT76x02_USB) += mt76x02-usb.o @@ -12,6 +13,7 @@ mt76-$(CONFIG_PCI) += pci.o mt76-$(CONFIG_NL80211_TESTMODE) += testmode.o mt76-usb-y := usb.o usb_trace.o +mt76-sdio-y := sdio.o CFLAGS_trace.o := -I$(src) CFLAGS_usb_trace.o := -I$(src) diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c index f340af40f8f4..3d4bf72700a5 100644 --- a/drivers/net/wireless/mediatek/mt76/mac80211.c +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -305,7 +305,11 @@ mt76_phy_init(struct mt76_dev *dev, struct ieee80211_hw *hw) ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); ieee80211_hw_set(hw, TX_AMSDU); - ieee80211_hw_set(hw, TX_FRAG_LIST); + + /* TODO: avoid linearization for SDIO */ + if (!mt76_is_sdio(dev)) + ieee80211_hw_set(hw, TX_FRAG_LIST); + ieee80211_hw_set(hw, MFP_CAPABLE); ieee80211_hw_set(hw, AP_LINK_PS); ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h index 8ee159d614ae..af35bc388ae2 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76.h +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -34,6 +34,7 @@ struct mt76_reg_pair { enum mt76_bus_type { MT76_BUS_MMIO, MT76_BUS_USB, + MT76_BUS_SDIO, }; struct mt76_bus_ops { @@ -53,6 +54,7 @@ struct mt76_bus_ops { #define mt76_is_usb(dev) ((dev)->bus->type == MT76_BUS_USB) #define mt76_is_mmio(dev) ((dev)->bus->type == MT76_BUS_MMIO) +#define mt76_is_sdio(dev) ((dev)->bus->type == MT76_BUS_SDIO) enum mt76_txq_id { MT_TXQ_VO = IEEE80211_AC_VO, @@ -95,6 +97,7 @@ struct mt76_queue_entry { union { struct mt76_txwi_cache *txwi; struct urb *urb; + int buf_sz; }; enum mt76_txq_id qid; bool skip_buf0:1; @@ -147,6 +150,8 @@ struct mt76_mcu_ops { int len, bool wait_resp); int (*mcu_skb_send_msg)(struct mt76_dev *dev, struct sk_buff *skb, int cmd, bool wait_resp); + u32 (*mcu_rr)(struct mt76_dev *dev, u32 offset); + void (*mcu_wr)(struct mt76_dev *dev, u32 offset, u32 val); int (*mcu_wr_rp)(struct mt76_dev *dev, u32 base, const struct mt76_reg_pair *rp, int len); int (*mcu_rd_rp)(struct mt76_dev *dev, u32 base, @@ -440,6 +445,24 @@ struct mt76_usb { } mcu; }; +struct mt76_sdio { + struct task_struct *tx_kthread; + struct task_struct *kthread; + struct work_struct stat_work; + + unsigned long state; + + struct sdio_func *func; + + struct { + struct mutex lock; + int pse_data_quota; + int ple_data_quota; + int pse_mcu_quota; + int deficit; + } sched; +}; + struct mt76_mmio { void __iomem *regs; spinlock_t irq_lock; @@ -626,6 +649,7 @@ struct mt76_dev { union { struct mt76_mmio mmio; struct mt76_usb usb; + struct mt76_sdio sdio; }; }; @@ -1030,6 +1054,12 @@ void mt76u_stop_rx(struct mt76_dev *dev); int mt76u_resume_rx(struct mt76_dev *dev); void mt76u_queues_deinit(struct mt76_dev *dev); +int mt76s_init(struct mt76_dev *dev, struct sdio_func *func, + const struct mt76_bus_ops *bus_ops); +int mt76s_alloc_queues(struct mt76_dev *dev); +void mt76s_stop_txrx(struct mt76_dev *dev); +void mt76s_deinit(struct mt76_dev *dev); + struct sk_buff * mt76_mcu_msg_alloc(struct mt76_dev *dev, const void *data, int data_len); diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c b/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c index 610cc1fbec5b..50009bc5ee8d 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb_sdio.c @@ -359,7 +359,10 @@ int mt7663_usb_sdio_register_device(struct mt7615_dev *dev) return err; /* check hw sg support in order to enable AMSDU */ - hw->max_tx_fragments = dev->mt76.usb.sg_en ? MT_HW_TXP_MAX_BUF_NUM : 1; + if (dev->mt76.usb.sg_en || mt76_is_sdio(&dev->mt76)) + hw->max_tx_fragments = MT_HW_TXP_MAX_BUF_NUM; + else + hw->max_tx_fragments = 1; hw->extra_tx_headroom += MT_USB_TXD_SIZE; if (mt76_is_usb(&dev->mt76)) hw->extra_tx_headroom += MT_USB_HDR_SIZE; diff --git a/drivers/net/wireless/mediatek/mt76/sdio.c b/drivers/net/wireless/mediatek/mt76/sdio.c new file mode 100644 index 000000000000..a6f3255c4d84 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/sdio.c @@ -0,0 +1,363 @@ +// SPDX-License-Identifier: ISC +/* Copyright (C) 2020 MediaTek Inc. + * + * This file is written based on mt76/usb.c. + * + * Author: Felix Fietkau + * Lorenzo Bianconi + * Sean Wang + */ + +#include +#include +#include +#include +#include +#include + +#include "mt76.h" + +static int +mt76s_alloc_rx_queue(struct mt76_dev *dev, enum mt76_rxq_id qid) +{ + struct mt76_queue *q = &dev->q_rx[qid]; + + spin_lock_init(&q->lock); + q->entry = devm_kcalloc(dev->dev, + MT_NUM_RX_ENTRIES, sizeof(*q->entry), + GFP_KERNEL); + if (!q->entry) + return -ENOMEM; + + q->ndesc = MT_NUM_RX_ENTRIES; + q->head = q->tail = 0; + q->queued = 0; + + return 0; +} + +static int mt76s_alloc_tx(struct mt76_dev *dev) +{ + struct mt76_queue *q; + int i; + + for (i = 0; i < MT_TXQ_MCU_WA; i++) { + INIT_LIST_HEAD(&dev->q_tx[i].swq); + + q = devm_kzalloc(dev->dev, sizeof(*q), GFP_KERNEL); + if (!q) + return -ENOMEM; + + spin_lock_init(&q->lock); + q->hw_idx = i; + dev->q_tx[i].q = q; + + q->entry = devm_kcalloc(dev->dev, + MT_NUM_TX_ENTRIES, sizeof(*q->entry), + GFP_KERNEL); + if (!q->entry) + return -ENOMEM; + + q->ndesc = MT_NUM_TX_ENTRIES; + } + + return 0; +} + +void mt76s_stop_txrx(struct mt76_dev *dev) +{ + struct mt76_sdio *sdio = &dev->sdio; + + cancel_work_sync(&sdio->stat_work); + clear_bit(MT76_READING_STATS, &dev->phy.state); + + mt76_tx_status_check(dev, NULL, true); +} +EXPORT_SYMBOL_GPL(mt76s_stop_txrx); + +int mt76s_alloc_queues(struct mt76_dev *dev) +{ + int err; + + err = mt76s_alloc_rx_queue(dev, MT_RXQ_MAIN); + if (err < 0) + return err; + + return mt76s_alloc_tx(dev); +} +EXPORT_SYMBOL_GPL(mt76s_alloc_queues); + +static struct mt76_queue_entry * +mt76s_get_next_rx_entry(struct mt76_queue *q) +{ + struct mt76_queue_entry *e = NULL; + + spin_lock_bh(&q->lock); + if (q->queued > 0) { + e = &q->entry[q->head]; + q->head = (q->head + 1) % q->ndesc; + q->queued--; + } + spin_unlock_bh(&q->lock); + + return e; +} + +static int +mt76s_process_rx_queue(struct mt76_dev *dev, struct mt76_queue *q) +{ + int qid = q - &dev->q_rx[MT_RXQ_MAIN]; + int nframes = 0; + + while (true) { + struct mt76_queue_entry *e; + + if (!test_bit(MT76_STATE_INITIALIZED, &dev->phy.state)) + break; + + e = mt76s_get_next_rx_entry(q); + if (!e || !e->skb) + break; + + dev->drv->rx_skb(dev, MT_RXQ_MAIN, e->skb); + e->skb = NULL; + nframes++; + } + if (qid == MT_RXQ_MAIN) + mt76_rx_poll_complete(dev, MT_RXQ_MAIN, NULL); + + return nframes; +} + +static int mt76s_process_tx_queue(struct mt76_dev *dev, enum mt76_txq_id qid) +{ + struct mt76_sw_queue *sq = &dev->q_tx[qid]; + u32 n_dequeued = 0, n_sw_dequeued = 0; + struct mt76_queue_entry entry; + struct mt76_queue *q = sq->q; + bool wake; + + while (q->queued > n_dequeued) { + if (q->entry[q->head].schedule) { + q->entry[q->head].schedule = false; + n_sw_dequeued++; + } + + entry = q->entry[q->head]; + q->entry[q->head].done = false; + q->head = (q->head + 1) % q->ndesc; + n_dequeued++; + + if (qid == MT_TXQ_MCU) + dev_kfree_skb(entry.skb); + else + dev->drv->tx_complete_skb(dev, qid, &entry); + } + + spin_lock_bh(&q->lock); + + sq->swq_queued -= n_sw_dequeued; + q->queued -= n_dequeued; + + wake = q->stopped && q->queued < q->ndesc - 8; + if (wake) + q->stopped = false; + + if (!q->queued) + wake_up(&dev->tx_wait); + + spin_unlock_bh(&q->lock); + + if (qid == MT_TXQ_MCU) + goto out; + + mt76_txq_schedule(&dev->phy, qid); + + if (wake) + ieee80211_wake_queue(dev->hw, qid); + + wake_up_process(dev->sdio.tx_kthread); +out: + return n_dequeued; +} + +static void mt76s_tx_status_data(struct work_struct *work) +{ + struct mt76_sdio *sdio; + struct mt76_dev *dev; + u8 update = 1; + u16 count = 0; + + sdio = container_of(work, struct mt76_sdio, stat_work); + dev = container_of(sdio, struct mt76_dev, sdio); + + while (true) { + if (test_bit(MT76_REMOVED, &dev->phy.state)) + break; + + if (!dev->drv->tx_status_data(dev, &update)) + break; + count++; + } + + if (count && test_bit(MT76_STATE_RUNNING, &dev->phy.state)) + queue_work(dev->wq, &sdio->stat_work); + else + clear_bit(MT76_READING_STATS, &dev->phy.state); +} + +static int +mt76s_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid, + struct sk_buff *skb, struct mt76_wcid *wcid, + struct ieee80211_sta *sta) +{ + struct mt76_queue *q = dev->q_tx[qid].q; + struct mt76_tx_info tx_info = { + .skb = skb, + }; + int err, len = skb->len; + u16 idx = q->tail; + + if (q->queued == q->ndesc) + return -ENOSPC; + + skb->prev = skb->next = NULL; + err = dev->drv->tx_prepare_skb(dev, NULL, qid, wcid, sta, &tx_info); + if (err < 0) + return err; + + q->entry[q->tail].skb = tx_info.skb; + q->entry[q->tail].buf_sz = len; + q->tail = (q->tail + 1) % q->ndesc; + + return idx; +} + +static int +mt76s_tx_queue_skb_raw(struct mt76_dev *dev, enum mt76_txq_id qid, + struct sk_buff *skb, u32 tx_info) +{ + struct mt76_queue *q = dev->q_tx[qid].q; + int ret = -ENOSPC, len = skb->len; + + spin_lock_bh(&q->lock); + if (q->queued == q->ndesc) + goto out; + + ret = mt76_skb_adjust_pad(skb); + if (ret) + goto out; + + q->entry[q->tail].buf_sz = len; + q->entry[q->tail].skb = skb; + q->tail = (q->tail + 1) % q->ndesc; + +out: + spin_unlock_bh(&q->lock); + + return ret; +} + +static void mt76s_tx_kick(struct mt76_dev *dev, struct mt76_queue *q) +{ + struct mt76_sdio *sdio = &dev->sdio; + + wake_up_process(sdio->tx_kthread); +} + +static const struct mt76_queue_ops sdio_queue_ops = { + .tx_queue_skb = mt76s_tx_queue_skb, + .kick = mt76s_tx_kick, + .tx_queue_skb_raw = mt76s_tx_queue_skb_raw, +}; + +static int mt76s_kthread_run(void *data) +{ + struct mt76_dev *dev = data; + struct mt76_phy *mphy = &dev->phy; + + while (!kthread_should_stop()) { + int i, nframes = 0; + + cond_resched(); + + /* rx processing */ + local_bh_disable(); + rcu_read_lock(); + + mt76_for_each_q_rx(dev, i) + nframes += mt76s_process_rx_queue(dev, &dev->q_rx[i]); + + rcu_read_unlock(); + local_bh_enable(); + + /* tx processing */ + for (i = 0; i < MT_TXQ_MCU_WA; i++) + nframes += mt76s_process_tx_queue(dev, i); + + if (dev->drv->tx_status_data && + !test_and_set_bit(MT76_READING_STATS, &mphy->state)) + queue_work(dev->wq, &dev->sdio.stat_work); + + if (!nframes || !test_bit(MT76_STATE_RUNNING, &mphy->state)) { + set_current_state(TASK_INTERRUPTIBLE); + schedule(); + } + } + + return 0; +} + +void mt76s_deinit(struct mt76_dev *dev) +{ + struct mt76_sdio *sdio = &dev->sdio; + int i; + + kthread_stop(sdio->kthread); + kthread_stop(sdio->tx_kthread); + mt76s_stop_txrx(dev); + + sdio_claim_host(sdio->func); + sdio_release_irq(sdio->func); + sdio_release_host(sdio->func); + + mt76_for_each_q_rx(dev, i) { + struct mt76_queue *q = &dev->q_rx[i]; + int j; + + for (j = 0; j < q->ndesc; j++) { + struct mt76_queue_entry *e = &q->entry[j]; + + if (!e->skb) + continue; + + dev_kfree_skb(e->skb); + e->skb = NULL; + } + } +} +EXPORT_SYMBOL_GPL(mt76s_deinit); + +int mt76s_init(struct mt76_dev *dev, struct sdio_func *func, + const struct mt76_bus_ops *bus_ops) +{ + struct mt76_sdio *sdio = &dev->sdio; + + sdio->kthread = kthread_create(mt76s_kthread_run, dev, "mt76s"); + if (IS_ERR(sdio->kthread)) + return PTR_ERR(sdio->kthread); + + INIT_WORK(&sdio->stat_work, mt76s_tx_status_data); + + mutex_init(&sdio->sched.lock); + dev->queue_ops = &sdio_queue_ops; + dev->bus = bus_ops; + dev->sdio.func = func; + + return 0; +} +EXPORT_SYMBOL_GPL(mt76s_init); + +MODULE_AUTHOR("Sean Wang "); +MODULE_AUTHOR("Lorenzo Bianconi "); +MODULE_LICENSE("Dual BSD/GPL"); -- cgit v1.2.3