summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/mediatek/mt76/mt792x_dma.c
blob: 488326ce5ed4d7ea836c17202e7fc6fdadd98f58 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
// SPDX-License-Identifier: ISC
/* Copyright (C) 2023 MediaTek Inc. */

#include <linux/module.h>
#include <linux/firmware.h>

#include "mt792x.h"
#include "dma.h"
#include "trace.h"

irqreturn_t mt792x_irq_handler(int irq, void *dev_instance)
{
	struct mt792x_dev *dev = dev_instance;

	mt76_wr(dev, dev->irq_map->host_irq_enable, 0);

	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
		return IRQ_NONE;

	tasklet_schedule(&dev->mt76.irq_tasklet);

	return IRQ_HANDLED;
}
EXPORT_SYMBOL_GPL(mt792x_irq_handler);

void mt792x_irq_tasklet(unsigned long data)
{
	struct mt792x_dev *dev = (struct mt792x_dev *)data;
	const struct mt792x_irq_map *irq_map = dev->irq_map;
	u32 intr, mask = 0;

	mt76_wr(dev, irq_map->host_irq_enable, 0);

	intr = mt76_rr(dev, MT_WFDMA0_HOST_INT_STA);
	intr &= dev->mt76.mmio.irqmask;
	mt76_wr(dev, MT_WFDMA0_HOST_INT_STA, intr);

	trace_dev_irq(&dev->mt76, intr, dev->mt76.mmio.irqmask);

	mask |= intr & (irq_map->rx.data_complete_mask |
			irq_map->rx.wm_complete_mask |
			irq_map->rx.wm2_complete_mask);
	if (intr & dev->irq_map->tx.mcu_complete_mask)
		mask |= dev->irq_map->tx.mcu_complete_mask;

	if (intr & MT_INT_MCU_CMD) {
		u32 intr_sw;

		intr_sw = mt76_rr(dev, MT_MCU_CMD);
		/* ack MCU2HOST_SW_INT_STA */
		mt76_wr(dev, MT_MCU_CMD, intr_sw);
		if (intr_sw & MT_MCU_CMD_WAKE_RX_PCIE) {
			mask |= irq_map->rx.data_complete_mask;
			intr |= irq_map->rx.data_complete_mask;
		}
	}

	mt76_set_irq_mask(&dev->mt76, irq_map->host_irq_enable, mask, 0);

	if (intr & dev->irq_map->tx.all_complete_mask)
		napi_schedule(&dev->mt76.tx_napi);

	if (intr & irq_map->rx.wm_complete_mask)
		napi_schedule(&dev->mt76.napi[MT_RXQ_MCU]);

	if (intr & irq_map->rx.wm2_complete_mask)
		napi_schedule(&dev->mt76.napi[MT_RXQ_MCU_WA]);

	if (intr & irq_map->rx.data_complete_mask)
		napi_schedule(&dev->mt76.napi[MT_RXQ_MAIN]);
}
EXPORT_SYMBOL_GPL(mt792x_irq_tasklet);

void mt792x_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q)
{
	struct mt792x_dev *dev = container_of(mdev, struct mt792x_dev, mt76);
	const struct mt792x_irq_map *irq_map = dev->irq_map;

	if (q == MT_RXQ_MAIN)
		mt76_connac_irq_enable(mdev, irq_map->rx.data_complete_mask);
	else if (q == MT_RXQ_MCU_WA)
		mt76_connac_irq_enable(mdev, irq_map->rx.wm2_complete_mask);
	else
		mt76_connac_irq_enable(mdev, irq_map->rx.wm_complete_mask);
}
EXPORT_SYMBOL_GPL(mt792x_rx_poll_complete);

#define PREFETCH(base, depth)	((base) << 16 | (depth))
static void mt792x_dma_prefetch(struct mt792x_dev *dev)
{
	if (is_mt7925(&dev->mt76)) {
		/* rx ring */
		mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0000, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING1_EXT_CTRL, PREFETCH(0x0040, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x0080, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x00c0, 0x4));
		/* tx ring */
		mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x0100, 0x10));
		mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x0200, 0x10));
		mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x0300, 0x10));
		mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x0400, 0x10));
		mt76_wr(dev, MT_WFDMA0_TX_RING15_EXT_CTRL, PREFETCH(0x0500, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x0540, 0x4));
	} else {
		/* rx ring */
		mt76_wr(dev, MT_WFDMA0_RX_RING0_EXT_CTRL, PREFETCH(0x0, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING2_EXT_CTRL, PREFETCH(0x40, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING3_EXT_CTRL, PREFETCH(0x80, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING4_EXT_CTRL, PREFETCH(0xc0, 0x4));
		mt76_wr(dev, MT_WFDMA0_RX_RING5_EXT_CTRL, PREFETCH(0x100, 0x4));
		/* tx ring */
		mt76_wr(dev, MT_WFDMA0_TX_RING0_EXT_CTRL, PREFETCH(0x140, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING1_EXT_CTRL, PREFETCH(0x180, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING2_EXT_CTRL, PREFETCH(0x1c0, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING3_EXT_CTRL, PREFETCH(0x200, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING4_EXT_CTRL, PREFETCH(0x240, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING5_EXT_CTRL, PREFETCH(0x280, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING6_EXT_CTRL, PREFETCH(0x2c0, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING16_EXT_CTRL, PREFETCH(0x340, 0x4));
		mt76_wr(dev, MT_WFDMA0_TX_RING17_EXT_CTRL, PREFETCH(0x380, 0x4));
	}
}

int mt792x_dma_enable(struct mt792x_dev *dev)
{
	if (is_mt7925(&dev->mt76))
		mt76_rmw(dev, MT_UWFDMA0_GLO_CFG_EXT1, BIT(28), BIT(28));

	/* configure perfetch settings */
	mt792x_dma_prefetch(dev);

	/* reset dma idx */
	mt76_wr(dev, MT_WFDMA0_RST_DTX_PTR, ~0);

	/* configure delay interrupt */
	mt76_wr(dev, MT_WFDMA0_PRI_DLY_INT_CFG0, 0);

	mt76_set(dev, MT_WFDMA0_GLO_CFG,
		 MT_WFDMA0_GLO_CFG_TX_WB_DDONE |
		 MT_WFDMA0_GLO_CFG_FIFO_LITTLE_ENDIAN |
		 MT_WFDMA0_GLO_CFG_CLK_GAT_DIS |
		 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
		 MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
		 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);

	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_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);

	/* enable interrupts for TX/RX rings */
	mt76_connac_irq_enable(&dev->mt76,
			       dev->irq_map->tx.all_complete_mask |
			       dev->irq_map->rx.data_complete_mask |
			       dev->irq_map->rx.wm2_complete_mask |
			       dev->irq_map->rx.wm_complete_mask |
			       MT_INT_MCU_CMD);
	mt76_set(dev, MT_MCU2HOST_SW_INT_ENA, MT_MCU_CMD_WAKE_RX_PCIE);

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_dma_enable);

static int
mt792x_dma_reset(struct mt792x_dev *dev, bool force)
{
	int i, err;

	err = mt792x_dma_disable(dev, force);
	if (err)
		return err;

	/* reset hw queues */
	for (i = 0; i < __MT_TXQ_MAX; i++)
		mt76_queue_reset(dev, dev->mphy.q_tx[i]);

	for (i = 0; i < __MT_MCUQ_MAX; i++)
		mt76_queue_reset(dev, dev->mt76.q_mcu[i]);

	mt76_for_each_q_rx(&dev->mt76, i)
		mt76_queue_reset(dev, &dev->mt76.q_rx[i]);

	mt76_tx_status_check(&dev->mt76, true);

	return mt792x_dma_enable(dev);
}

int mt792x_wpdma_reset(struct mt792x_dev *dev, bool force)
{
	int i, err;

	/* clean up hw queues */
	for (i = 0; i < ARRAY_SIZE(dev->mt76.phy.q_tx); i++)
		mt76_queue_tx_cleanup(dev, dev->mphy.q_tx[i], true);

	for (i = 0; i < ARRAY_SIZE(dev->mt76.q_mcu); i++)
		mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[i], true);

	mt76_for_each_q_rx(&dev->mt76, i)
		mt76_queue_rx_cleanup(dev, &dev->mt76.q_rx[i]);

	if (force) {
		err = mt792x_wfsys_reset(dev);
		if (err)
			return err;
	}
	err = mt792x_dma_reset(dev, force);
	if (err)
		return err;

	mt76_for_each_q_rx(&dev->mt76, i)
		mt76_queue_rx_reset(dev, i);

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_wpdma_reset);

int mt792x_wpdma_reinit_cond(struct mt792x_dev *dev)
{
	struct mt76_connac_pm *pm = &dev->pm;
	int err;

	/* check if the wpdma must be reinitialized */
	if (mt792x_dma_need_reinit(dev)) {
		/* disable interrutpts */
		mt76_wr(dev, dev->irq_map->host_irq_enable, 0);
		mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0x0);

		err = mt792x_wpdma_reset(dev, false);
		if (err) {
			dev_err(dev->mt76.dev, "wpdma reset failed\n");
			return err;
		}

		/* enable interrutpts */
		mt76_wr(dev, MT_PCIE_MAC_INT_ENABLE, 0xff);
		pm->stats.lp_wake++;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_wpdma_reinit_cond);

int mt792x_dma_disable(struct mt792x_dev *dev, bool force)
{
	/* disable WFDMA0 */
	mt76_clear(dev, MT_WFDMA0_GLO_CFG,
		   MT_WFDMA0_GLO_CFG_TX_DMA_EN | MT_WFDMA0_GLO_CFG_RX_DMA_EN |
		   MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
		   MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
		   MT_WFDMA0_GLO_CFG_OMIT_RX_INFO |
		   MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);

	if (!mt76_poll_msec_tick(dev, MT_WFDMA0_GLO_CFG,
				 MT_WFDMA0_GLO_CFG_TX_DMA_BUSY |
				 MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 100, 1))
		return -ETIMEDOUT;

	/* disable dmashdl */
	mt76_clear(dev, MT_WFDMA0_GLO_CFG_EXT0,
		   MT_WFDMA0_CSR_TX_DMASHDL_ENABLE);
	mt76_set(dev, MT_DMASHDL_SW_CONTROL, MT_DMASHDL_DMASHDL_BYPASS);

	if (force) {
		/* reset */
		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);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_dma_disable);

void mt792x_dma_cleanup(struct mt792x_dev *dev)
{
	/* disable */
	mt76_clear(dev, MT_WFDMA0_GLO_CFG,
		   MT_WFDMA0_GLO_CFG_TX_DMA_EN |
		   MT_WFDMA0_GLO_CFG_RX_DMA_EN |
		   MT_WFDMA0_GLO_CFG_CSR_DISP_BASE_PTR_CHAIN_EN |
		   MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
		   MT_WFDMA0_GLO_CFG_OMIT_RX_INFO |
		   MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2);

	mt76_poll_msec_tick(dev, MT_WFDMA0_GLO_CFG,
			    MT_WFDMA0_GLO_CFG_TX_DMA_BUSY |
			    MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 100, 1);

	/* reset */
	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);
}
EXPORT_SYMBOL_GPL(mt792x_dma_cleanup);

int mt792x_poll_tx(struct napi_struct *napi, int budget)
{
	struct mt792x_dev *dev;

	dev = container_of(napi, struct mt792x_dev, mt76.tx_napi);

	if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
		napi_complete(napi);
		queue_work(dev->mt76.wq, &dev->pm.wake_work);
		return 0;
	}

	mt76_connac_tx_cleanup(&dev->mt76);
	if (napi_complete(napi))
		mt76_connac_irq_enable(&dev->mt76,
				       dev->irq_map->tx.all_complete_mask);
	mt76_connac_pm_unref(&dev->mphy, &dev->pm);

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_poll_tx);

int mt792x_poll_rx(struct napi_struct *napi, int budget)
{
	struct mt792x_dev *dev;
	int done;

	dev = container_of(napi->dev, struct mt792x_dev, mt76.napi_dev);

	if (!mt76_connac_pm_ref(&dev->mphy, &dev->pm)) {
		napi_complete(napi);
		queue_work(dev->mt76.wq, &dev->pm.wake_work);
		return 0;
	}
	done = mt76_dma_rx_poll(napi, budget);
	mt76_connac_pm_unref(&dev->mphy, &dev->pm);

	return done;
}
EXPORT_SYMBOL_GPL(mt792x_poll_rx);

int mt792x_wfsys_reset(struct mt792x_dev *dev)
{
	u32 addr = is_mt7921(&dev->mt76) ? 0x18000140 : 0x7c000140;

	mt76_clear(dev, addr, WFSYS_SW_RST_B);
	msleep(50);
	mt76_set(dev, addr, WFSYS_SW_RST_B);

	if (!__mt76_poll_msec(&dev->mt76, addr, WFSYS_SW_INIT_DONE,
			      WFSYS_SW_INIT_DONE, 500))
		return -ETIMEDOUT;

	return 0;
}
EXPORT_SYMBOL_GPL(mt792x_wfsys_reset);