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dma.c
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dma.c
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// SPDX-License-Identifier: ISC
/* Copyright (C) 2020 MediaTek Inc. */
#include "mt7915.h"
#include "../dma.h"
#include "mac.h"
int mt7915_init_tx_queues(struct mt7915_phy *phy, int idx, int n_desc)
{
int i, err;
err = mt76_init_tx_queue(phy->mt76, 0, idx, n_desc, MT_TX_RING_BASE);
if (err < 0)
return err;
for (i = 0; i <= MT_TXQ_PSD; i++)
phy->mt76->q_tx[i] = phy->mt76->q_tx[0];
return 0;
}
void mt7915_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
struct sk_buff *skb)
{
struct mt7915_dev *dev = container_of(mdev, struct mt7915_dev, mt76);
__le32 *rxd = (__le32 *)skb->data;
enum rx_pkt_type type;
type = FIELD_GET(MT_RXD0_PKT_TYPE, le32_to_cpu(rxd[0]));
switch (type) {
case PKT_TYPE_TXRX_NOTIFY:
mt7915_mac_tx_free(dev, skb);
break;
case PKT_TYPE_RX_EVENT:
mt7915_mcu_rx_event(dev, skb);
break;
#ifdef CONFIG_NL80211_TESTMODE
case PKT_TYPE_TXRXV:
mt7915_mac_fill_rx_vector(dev, skb);
break;
#endif
case PKT_TYPE_NORMAL:
if (!mt7915_mac_fill_rx(dev, skb)) {
mt76_rx(&dev->mt76, q, skb);
return;
}
fallthrough;
default:
dev_kfree_skb(skb);
break;
}
}
static void
mt7915_tx_cleanup(struct mt7915_dev *dev)
{
mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WA], false);
}
static int mt7915_poll_tx(struct napi_struct *napi, int budget)
{
struct mt7915_dev *dev;
dev = container_of(napi, struct mt7915_dev, mt76.tx_napi);
mt7915_tx_cleanup(dev);
if (napi_complete_done(napi, 0))
mt7915_irq_enable(dev, MT_INT_TX_DONE_MCU);
return 0;
}
static void __mt7915_dma_prefetch(struct mt7915_dev *dev, u32 ofs)
{
#define PREFETCH(base, depth) ((base) << 16 | (depth))
mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL + ofs, PREFETCH(0x0, 0x4));
mt76_wr(dev, MT_WFDMA0_RX_RING1_EXT_CTRL + ofs, PREFETCH(0x40, 0x4));
mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL + ofs, PREFETCH(0x80, 0x0));
mt76_wr(dev, MT_WFDMA1_TX_RING0_EXT_CTRL + ofs, PREFETCH(0x80, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING1_EXT_CTRL + ofs, PREFETCH(0xc0, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING2_EXT_CTRL + ofs, PREFETCH(0x100, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING3_EXT_CTRL + ofs, PREFETCH(0x140, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING4_EXT_CTRL + ofs, PREFETCH(0x180, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING5_EXT_CTRL + ofs, PREFETCH(0x1c0, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING6_EXT_CTRL + ofs, PREFETCH(0x200, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING7_EXT_CTRL + ofs, PREFETCH(0x240, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING16_EXT_CTRL + ofs, PREFETCH(0x280, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING17_EXT_CTRL + ofs, PREFETCH(0x2c0, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING18_EXT_CTRL + ofs, PREFETCH(0x300, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING19_EXT_CTRL + ofs, PREFETCH(0x340, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING20_EXT_CTRL + ofs, PREFETCH(0x380, 0x4));
mt76_wr(dev, MT_WFDMA1_TX_RING21_EXT_CTRL + ofs, PREFETCH(0x3c0, 0x0));
mt76_wr(dev, MT_WFDMA1_RX_RING0_EXT_CTRL + ofs, PREFETCH(0x3c0, 0x4));
mt76_wr(dev, MT_WFDMA1_RX_RING1_EXT_CTRL + ofs, PREFETCH(0x400, 0x4));
mt76_wr(dev, MT_WFDMA1_RX_RING2_EXT_CTRL + ofs, PREFETCH(0x440, 0x4));
mt76_wr(dev, MT_WFDMA1_RX_RING3_EXT_CTRL + ofs, PREFETCH(0x480, 0x0));
}
void mt7915_dma_prefetch(struct mt7915_dev *dev)
{
__mt7915_dma_prefetch(dev, 0);
if (dev->hif2)
__mt7915_dma_prefetch(dev, MT_WFDMA1_PCIE1_BASE - MT_WFDMA1_BASE);
}
int mt7915_dma_init(struct mt7915_dev *dev)
{
/* Increase buffer size to receive large VHT/HE MPDUs */
int rx_buf_size = MT_RX_BUF_SIZE * 2;
u32 hif1_ofs = 0;
int ret;
mt76_dma_attach(&dev->mt76);
if (dev->hif2)
hif1_ofs = MT_WFDMA1_PCIE1_BASE - MT_WFDMA1_BASE;
/* configure global setting */
mt76_set(dev, MT_WFDMA1_GLO_CFG,
MT_WFDMA1_GLO_CFG_OMIT_TX_INFO |
MT_WFDMA1_GLO_CFG_OMIT_RX_INFO);
/* reset dma idx */
mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR, ~0);
mt76_wr(dev, MT_WFDMA1_RST_DTX_PTR, ~0);
/* configure delay interrupt */
mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0, 0);
mt76_wr(dev, MT_WFDMA1_PRI_DLY_INT_CFG0, 0);
if (dev->hif2) {
mt76_set(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
MT_WFDMA1_GLO_CFG_OMIT_TX_INFO |
MT_WFDMA1_GLO_CFG_OMIT_RX_INFO);
mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR + hif1_ofs, ~0);
mt76_wr(dev, MT_WFDMA1_RST_DTX_PTR + hif1_ofs, ~0);
mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0 + hif1_ofs, 0);
mt76_wr(dev, MT_WFDMA1_PRI_DLY_INT_CFG0 + hif1_ofs, 0);
}
/* configure perfetch settings */
mt7915_dma_prefetch(dev);
/* init tx queue */
ret = mt7915_init_tx_queues(&dev->phy, MT7915_TXQ_BAND0,
MT7915_TX_RING_SIZE);
if (ret)
return ret;
/* command to WM */
ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WM, MT7915_TXQ_MCU_WM,
MT7915_TX_MCU_RING_SIZE, MT_TX_RING_BASE);
if (ret)
return ret;
/* command to WA */
ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_WA, MT7915_TXQ_MCU_WA,
MT7915_TX_MCU_RING_SIZE, MT_TX_RING_BASE);
if (ret)
return ret;
/* firmware download */
ret = mt76_init_mcu_queue(&dev->mt76, MT_MCUQ_FWDL, MT7915_TXQ_FWDL,
MT7915_TX_FWDL_RING_SIZE, MT_TX_RING_BASE);
if (ret)
return ret;
/* event from WM */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU],
MT7915_RXQ_MCU_WM, MT7915_RX_MCU_RING_SIZE,
rx_buf_size, MT_RX_EVENT_RING_BASE);
if (ret)
return ret;
/* event from WA */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MCU_WA],
MT7915_RXQ_MCU_WA, MT7915_RX_MCU_RING_SIZE,
rx_buf_size, MT_RX_EVENT_RING_BASE);
if (ret)
return ret;
/* rx data queue */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_MAIN],
MT7915_RXQ_BAND0, MT7915_RX_RING_SIZE,
rx_buf_size, MT_RX_DATA_RING_BASE);
if (ret)
return ret;
if (dev->dbdc_support) {
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_EXT],
MT7915_RXQ_BAND1, MT7915_RX_RING_SIZE,
rx_buf_size,
MT_RX_DATA_RING_BASE + hif1_ofs);
if (ret)
return ret;
/* event from WA */
ret = mt76_queue_alloc(dev, &dev->mt76.q_rx[MT_RXQ_EXT_WA],
MT7915_RXQ_MCU_WA_EXT,
MT7915_RX_MCU_RING_SIZE,
rx_buf_size,
MT_RX_EVENT_RING_BASE + hif1_ofs);
if (ret)
return ret;
}
ret = mt76_init_queues(dev);
if (ret < 0)
return ret;
netif_tx_napi_add(&dev->mt76.tx_napi_dev, &dev->mt76.tx_napi,
mt7915_poll_tx, NAPI_POLL_WEIGHT);
napi_enable(&dev->mt76.tx_napi);
/* hif wait WFDMA idle */
mt76_set(dev, MT_WFDMA0_BUSY_ENA,
MT_WFDMA0_BUSY_ENA_TX_FIFO0 |
MT_WFDMA0_BUSY_ENA_TX_FIFO1 |
MT_WFDMA0_BUSY_ENA_RX_FIFO);
mt76_set(dev, MT_WFDMA1_BUSY_ENA,
MT_WFDMA1_BUSY_ENA_TX_FIFO0 |
MT_WFDMA1_BUSY_ENA_TX_FIFO1 |
MT_WFDMA1_BUSY_ENA_RX_FIFO);
mt76_set(dev, MT_WFDMA0_PCIE1_BUSY_ENA,
MT_WFDMA0_PCIE1_BUSY_ENA_TX_FIFO0 |
MT_WFDMA0_PCIE1_BUSY_ENA_TX_FIFO1 |
MT_WFDMA0_PCIE1_BUSY_ENA_RX_FIFO);
mt76_set(dev, MT_WFDMA1_PCIE1_BUSY_ENA,
MT_WFDMA1_PCIE1_BUSY_ENA_TX_FIFO0 |
MT_WFDMA1_PCIE1_BUSY_ENA_TX_FIFO1 |
MT_WFDMA1_PCIE1_BUSY_ENA_RX_FIFO);
mt76_poll(dev, MT_WFDMA_EXT_CSR_HIF_MISC,
MT_WFDMA_EXT_CSR_HIF_MISC_BUSY, 0, 1000);
/* set WFDMA Tx/Rx */
mt76_set(dev, MT_WFDMA0_GLO_CFG,
MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN);
mt76_set(dev, MT_WFDMA1_GLO_CFG,
MT_WFDMA1_GLO_CFG_TX_DMA_EN | MT_WFDMA1_GLO_CFG_RX_DMA_EN);
if (dev->hif2) {
mt76_set(dev, MT_WFDMA0_GLO_CFG + hif1_ofs,
(MT_WFDMA0_GLO_CFG_TX_DMA_EN |
MT_WFDMA0_GLO_CFG_RX_DMA_EN));
mt76_set(dev, MT_WFDMA1_GLO_CFG + hif1_ofs,
(MT_WFDMA1_GLO_CFG_TX_DMA_EN |
MT_WFDMA1_GLO_CFG_RX_DMA_EN));
mt76_set(dev, MT_WFDMA_HOST_CONFIG,
MT_WFDMA_HOST_CONFIG_PDMA_BAND);
}
/* enable interrupts for TX/RX rings */
mt7915_irq_enable(dev, MT_INT_RX_DONE_ALL | MT_INT_TX_DONE_MCU |
MT_INT_MCU_CMD);
return 0;
}
void mt7915_dma_cleanup(struct mt7915_dev *dev)
{
/* disable */
mt76_clear(dev, MT_WFDMA0_GLO_CFG,
MT_WFDMA0_GLO_CFG_TX_DMA_EN |
MT_WFDMA0_GLO_CFG_RX_DMA_EN);
mt76_clear(dev, MT_WFDMA1_GLO_CFG,
MT_WFDMA1_GLO_CFG_TX_DMA_EN |
MT_WFDMA1_GLO_CFG_RX_DMA_EN);
/* reset */
mt76_clear(dev, MT_WFDMA1_RST,
MT_WFDMA1_RST_DMASHDL_ALL_RST |
MT_WFDMA1_RST_LOGIC_RST);
mt76_set(dev, MT_WFDMA1_RST,
MT_WFDMA1_RST_DMASHDL_ALL_RST |
MT_WFDMA1_RST_LOGIC_RST);
mt76_clear(dev, MT_WFDMA0_RST,
MT_WFDMA0_RST_DMASHDL_ALL_RST |
MT_WFDMA0_RST_LOGIC_RST);
mt76_set(dev, MT_WFDMA0_RST,
MT_WFDMA0_RST_DMASHDL_ALL_RST |
MT_WFDMA0_RST_LOGIC_RST);
mt76_dma_cleanup(&dev->mt76);
}