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linux/drivers/net/wireless/mediatek/mt76/mt7615/sdio.c
Sean Wang bf08d58543 mt76: sdio: honor the largest Tx buffer the hardware can support 
We don't have to create a separate sdio.xmit_buf buffer for each queue.
Instead, we just need to create one, reuse it across all queues to reduce
memory consumption further.

And then we should take it into account the actual the host and the device
MMC capability to determine what the appropriate xmit_buf_size can be.

Both MT7921S and MT7663 can support up to Tx FIFO size of 0x3fe00 which
means the device can receive 511 blocks of block size 512 in a row from
the host. So if the driver aggregates the frames as many as possible the
the device can support, we can merge multiple MMC requests into a single
one to get rid of the overhead of the handling and synchronizing in those
unnecessary MMC requests and reduce the SDIO lock contention with the
Bluetooth concurrent traffic and finally to have the higher bus
utilization with less idle cycle.

With the patch, it is helpful for WiFi to have steady throughput
performance especially while running Bluetooth concurrently.

Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2022-02-03 13:58:00 +01:00

266 lines
6.3 KiB
C
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// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc.
*
* Author: Felix Fietkau <nbd@nbd.name>
* Lorenzo Bianconi <lorenzo@kernel.org>
* Sean Wang <sean.wang@mediatek.com>
*/
#include <linux/kernel.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/sdio_func.h>
#include "../sdio.h"
#include "mt7615.h"
#include "mac.h"
#include "mcu.h"
static const struct sdio_device_id mt7663s_table[] = {
{ SDIO_DEVICE(SDIO_VENDOR_ID_MEDIATEK, 0x7603) },
{ } /* Terminating entry */
};
static void mt7663s_txrx_worker(struct mt76_worker *w)
{
struct mt76_sdio *sdio = container_of(w, struct mt76_sdio,
txrx_worker);
struct mt76_dev *mdev = container_of(sdio, struct mt76_dev, sdio);
struct mt7615_dev *dev = container_of(mdev, struct mt7615_dev, mt76);
if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
queue_work(mdev->wq, &dev->pm.wake_work);
return;
}
mt76s_txrx_worker(sdio);
mt76_connac_pm_unref(&dev->mphy, &dev->pm);
}
static void mt7663s_init_work(struct work_struct *work)
{
struct mt7615_dev *dev;
dev = container_of(work, struct mt7615_dev, mcu_work);
if (mt7663s_mcu_init(dev))
return;
mt7615_init_work(dev);
}
static int mt7663s_parse_intr(struct mt76_dev *dev, struct mt76s_intr *intr)
{
struct mt76_sdio *sdio = &dev->sdio;
struct mt7663s_intr *irq_data = sdio->intr_data;
int i, err;
sdio_claim_host(sdio->func);
err = sdio_readsb(sdio->func, irq_data, MCR_WHISR, sizeof(*irq_data));
sdio_release_host(sdio->func);
if (err)
return err;
intr->isr = irq_data->isr;
intr->rec_mb = irq_data->rec_mb;
intr->tx.wtqcr = irq_data->tx.wtqcr;
intr->rx.num = irq_data->rx.num;
for (i = 0; i < 2 ; i++)
intr->rx.len[i] = irq_data->rx.len[i];
return 0;
}
static int mt7663s_probe(struct sdio_func *func,
const struct sdio_device_id *id)
{
static const struct mt76_driver_ops drv_ops = {
.txwi_size = MT_USB_TXD_SIZE,
.drv_flags = MT_DRV_RX_DMA_HDR,
.tx_prepare_skb = mt7663_usb_sdio_tx_prepare_skb,
.tx_complete_skb = mt7663_usb_sdio_tx_complete_skb,
.tx_status_data = mt7663_usb_sdio_tx_status_data,
.rx_skb = mt7615_queue_rx_skb,
.sta_ps = mt7615_sta_ps,
.sta_add = mt7615_mac_sta_add,
.sta_remove = mt7615_mac_sta_remove,
.update_survey = mt7615_update_channel,
};
static const struct mt76_bus_ops mt7663s_ops = {
.rr = mt76s_rr,
.rmw = mt76s_rmw,
.wr = mt76s_wr,
.write_copy = mt76s_write_copy,
.read_copy = mt76s_read_copy,
.wr_rp = mt76s_wr_rp,
.rd_rp = mt76s_rd_rp,
.type = MT76_BUS_SDIO,
};
struct ieee80211_ops *ops;
struct mt7615_dev *dev;
struct mt76_dev *mdev;
int ret;
ops = devm_kmemdup(&func->dev, &mt7615_ops, sizeof(mt7615_ops),
GFP_KERNEL);
if (!ops)
return -ENOMEM;
mdev = mt76_alloc_device(&func->dev, sizeof(*dev), ops, &drv_ops);
if (!mdev)
return -ENOMEM;
dev = container_of(mdev, struct mt7615_dev, mt76);
INIT_WORK(&dev->mcu_work, mt7663s_init_work);
dev->reg_map = mt7663_usb_sdio_reg_map;
dev->ops = ops;
sdio_set_drvdata(func, dev);
ret = mt76s_init(mdev, func, &mt7663s_ops);
if (ret < 0)
goto error;
ret = mt76s_hw_init(mdev, func, MT76_CONNAC_SDIO);
if (ret)
goto error;
mdev->rev = (mt76_rr(dev, MT_HW_CHIPID) << 16) |
(mt76_rr(dev, MT_HW_REV) & 0xff);
dev_dbg(mdev->dev, "ASIC revision: %04x\n", mdev->rev);
mdev->sdio.parse_irq = mt7663s_parse_intr;
mdev->sdio.intr_data = devm_kmalloc(mdev->dev,
sizeof(struct mt7663s_intr),
GFP_KERNEL);
if (!mdev->sdio.intr_data) {
ret = -ENOMEM;
goto error;
}
ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
if (ret)
goto error;
ret = mt76s_alloc_tx(mdev);
if (ret)
goto error;
ret = mt76_worker_setup(mt76_hw(dev), &mdev->sdio.txrx_worker,
mt7663s_txrx_worker, "sdio-txrx");
if (ret)
goto error;
sched_set_fifo_low(mdev->sdio.txrx_worker.task);
ret = mt7663_usb_sdio_register_device(dev);
if (ret)
goto error;
return 0;
error:
mt76s_deinit(&dev->mt76);
mt76_free_device(&dev->mt76);
return ret;
}
static void mt7663s_remove(struct sdio_func *func)
{
struct mt7615_dev *dev = sdio_get_drvdata(func);
if (!test_and_clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
return;
ieee80211_unregister_hw(dev->mt76.hw);
mt76s_deinit(&dev->mt76);
mt76_free_device(&dev->mt76);
}
#ifdef CONFIG_PM
static int mt7663s_suspend(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct mt7615_dev *mdev = sdio_get_drvdata(func);
int err;
if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
mt7615_firmware_offload(mdev)) {
int err;
err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, true);
if (err < 0)
return err;
}
sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
err = mt7615_mcu_set_fw_ctrl(mdev);
if (err)
return err;
mt76_worker_disable(&mdev->mt76.sdio.txrx_worker);
mt76_worker_disable(&mdev->mt76.sdio.status_worker);
mt76_worker_disable(&mdev->mt76.sdio.net_worker);
cancel_work_sync(&mdev->mt76.sdio.stat_work);
clear_bit(MT76_READING_STATS, &mdev->mphy.state);
mt76_tx_status_check(&mdev->mt76, true);
return 0;
}
static int mt7663s_resume(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct mt7615_dev *mdev = sdio_get_drvdata(func);
int err;
mt76_worker_enable(&mdev->mt76.sdio.txrx_worker);
mt76_worker_enable(&mdev->mt76.sdio.status_worker);
mt76_worker_enable(&mdev->mt76.sdio.net_worker);
err = mt7615_mcu_set_drv_ctrl(mdev);
if (err)
return err;
if (!test_bit(MT76_STATE_SUSPEND, &mdev->mphy.state) &&
mt7615_firmware_offload(mdev))
err = mt76_connac_mcu_set_hif_suspend(&mdev->mt76, false);
return err;
}
static const struct dev_pm_ops mt7663s_pm_ops = {
.suspend = mt7663s_suspend,
.resume = mt7663s_resume,
};
#endif
MODULE_DEVICE_TABLE(sdio, mt7663s_table);
MODULE_FIRMWARE(MT7663_OFFLOAD_FIRMWARE_N9);
MODULE_FIRMWARE(MT7663_OFFLOAD_ROM_PATCH);
MODULE_FIRMWARE(MT7663_FIRMWARE_N9);
MODULE_FIRMWARE(MT7663_ROM_PATCH);
static struct sdio_driver mt7663s_driver = {
.name = KBUILD_MODNAME,
.probe = mt7663s_probe,
.remove = mt7663s_remove,
.id_table = mt7663s_table,
#ifdef CONFIG_PM
.drv = {
.pm = &mt7663s_pm_ops,
}
#endif
};
module_sdio_driver(mt7663s_driver);
MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>");
MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
MODULE_LICENSE("Dual BSD/GPL");
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