summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
blob: 20909036e002800fb39f1a5e66a90b4f7c60dcfa (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
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
 * stmmac XGMAC support.
 */

#include <linux/iopoll.h>
#include "stmmac.h"
#include "dwxgmac2.h"

static int dwxgmac2_dma_reset(void __iomem *ioaddr)
{
	u32 value = readl(ioaddr + XGMAC_DMA_MODE);

	/* DMA SW reset */
	writel(value | XGMAC_SWR, ioaddr + XGMAC_DMA_MODE);

	return readl_poll_timeout(ioaddr + XGMAC_DMA_MODE, value,
				  !(value & XGMAC_SWR), 0, 100000);
}

static void dwxgmac2_dma_init(void __iomem *ioaddr,
			      struct stmmac_dma_cfg *dma_cfg, int atds)
{
	u32 value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE);

	if (dma_cfg->aal)
		value |= XGMAC_AAL;

	writel(value, ioaddr + XGMAC_DMA_SYSBUS_MODE);
}

static void dwxgmac2_dma_init_chan(void __iomem *ioaddr,
				   struct stmmac_dma_cfg *dma_cfg, u32 chan)
{
	u32 value = readl(ioaddr + XGMAC_DMA_CH_CONTROL(chan));

	if (dma_cfg->pblx8)
		value |= XGMAC_PBLx8;

	writel(value, ioaddr + XGMAC_DMA_CH_CONTROL(chan));
	writel(XGMAC_DMA_INT_DEFAULT_EN, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
}

static void dwxgmac2_dma_init_rx_chan(void __iomem *ioaddr,
				      struct stmmac_dma_cfg *dma_cfg,
				      u32 dma_rx_phy, u32 chan)
{
	u32 rxpbl = dma_cfg->rxpbl ?: dma_cfg->pbl;
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
	value &= ~XGMAC_RxPBL;
	value |= (rxpbl << XGMAC_RxPBL_SHIFT) & XGMAC_RxPBL;
	writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));

	writel(dma_rx_phy, ioaddr + XGMAC_DMA_CH_RxDESC_LADDR(chan));
}

static void dwxgmac2_dma_init_tx_chan(void __iomem *ioaddr,
				      struct stmmac_dma_cfg *dma_cfg,
				      u32 dma_tx_phy, u32 chan)
{
	u32 txpbl = dma_cfg->txpbl ?: dma_cfg->pbl;
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
	value &= ~XGMAC_TxPBL;
	value |= (txpbl << XGMAC_TxPBL_SHIFT) & XGMAC_TxPBL;
	value |= XGMAC_OSP;
	writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));

	writel(dma_tx_phy, ioaddr + XGMAC_DMA_CH_TxDESC_LADDR(chan));
}

static void dwxgmac2_dma_axi(void __iomem *ioaddr, struct stmmac_axi *axi)
{
	u32 value = readl(ioaddr + XGMAC_DMA_SYSBUS_MODE);
	int i;

	if (axi->axi_lpi_en)
		value |= XGMAC_EN_LPI;
	if (axi->axi_xit_frm)
		value |= XGMAC_LPI_XIT_PKT;

	value &= ~XGMAC_WR_OSR_LMT;
	value |= (axi->axi_wr_osr_lmt << XGMAC_WR_OSR_LMT_SHIFT) &
		XGMAC_WR_OSR_LMT;

	value &= ~XGMAC_RD_OSR_LMT;
	value |= (axi->axi_rd_osr_lmt << XGMAC_RD_OSR_LMT_SHIFT) &
		XGMAC_RD_OSR_LMT;

	value &= ~XGMAC_BLEN;
	for (i = 0; i < AXI_BLEN; i++) {
		if (axi->axi_blen[i])
			value &= ~XGMAC_UNDEF;

		switch (axi->axi_blen[i]) {
		case 256:
			value |= XGMAC_BLEN256;
			break;
		case 128:
			value |= XGMAC_BLEN128;
			break;
		case 64:
			value |= XGMAC_BLEN64;
			break;
		case 32:
			value |= XGMAC_BLEN32;
			break;
		case 16:
			value |= XGMAC_BLEN16;
			break;
		case 8:
			value |= XGMAC_BLEN8;
			break;
		case 4:
			value |= XGMAC_BLEN4;
			break;
		}
	}

	writel(value, ioaddr + XGMAC_DMA_SYSBUS_MODE);
}

static void dwxgmac2_dma_rx_mode(void __iomem *ioaddr, int mode,
				 u32 channel, int fifosz, u8 qmode)
{
	u32 value = readl(ioaddr + XGMAC_MTL_RXQ_OPMODE(channel));
	unsigned int rqs = fifosz / 256 - 1;

	if (mode == SF_DMA_MODE) {
		value |= XGMAC_RSF;
	} else {
		value &= ~XGMAC_RSF;
		value &= ~XGMAC_RTC;

		if (mode <= 64)
			value |= 0x0 << XGMAC_RTC_SHIFT;
		else if (mode <= 96)
			value |= 0x2 << XGMAC_RTC_SHIFT;
		else
			value |= 0x3 << XGMAC_RTC_SHIFT;
	}

	value &= ~XGMAC_RQS;
	value |= (rqs << XGMAC_RQS_SHIFT) & XGMAC_RQS;

	writel(value, ioaddr + XGMAC_MTL_RXQ_OPMODE(channel));

	/* Enable MTL RX overflow */
	value = readl(ioaddr + XGMAC_MTL_QINTEN(channel));
	writel(value | XGMAC_RXOIE, ioaddr + XGMAC_MTL_QINTEN(channel));
}

static void dwxgmac2_dma_tx_mode(void __iomem *ioaddr, int mode,
				 u32 channel, int fifosz, u8 qmode)
{
	u32 value = readl(ioaddr + XGMAC_MTL_TXQ_OPMODE(channel));
	unsigned int tqs = fifosz / 256 - 1;

	if (mode == SF_DMA_MODE) {
		value |= XGMAC_TSF;
	} else {
		value &= ~XGMAC_TSF;
		value &= ~XGMAC_TTC;

		if (mode <= 64)
			value |= 0x0 << XGMAC_TTC_SHIFT;
		else if (mode <= 96)
			value |= 0x2 << XGMAC_TTC_SHIFT;
		else if (mode <= 128)
			value |= 0x3 << XGMAC_TTC_SHIFT;
		else if (mode <= 192)
			value |= 0x4 << XGMAC_TTC_SHIFT;
		else if (mode <= 256)
			value |= 0x5 << XGMAC_TTC_SHIFT;
		else if (mode <= 384)
			value |= 0x6 << XGMAC_TTC_SHIFT;
		else
			value |= 0x7 << XGMAC_TTC_SHIFT;
	}

	value &= ~XGMAC_TXQEN;
	if (qmode != MTL_QUEUE_AVB)
		value |= 0x2 << XGMAC_TXQEN_SHIFT;
	else
		value |= 0x1 << XGMAC_TXQEN_SHIFT;

	value &= ~XGMAC_TQS;
	value |= (tqs << XGMAC_TQS_SHIFT) & XGMAC_TQS;

	writel(value, ioaddr +  XGMAC_MTL_TXQ_OPMODE(channel));
}

static void dwxgmac2_enable_dma_irq(void __iomem *ioaddr, u32 chan)
{
	writel(XGMAC_DMA_INT_DEFAULT_EN, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
}

static void dwxgmac2_disable_dma_irq(void __iomem *ioaddr, u32 chan)
{
	writel(0, ioaddr + XGMAC_DMA_CH_INT_EN(chan));
}

static void dwxgmac2_dma_start_tx(void __iomem *ioaddr, u32 chan)
{
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
	value |= XGMAC_TXST;
	writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));

	value = readl(ioaddr + XGMAC_TX_CONFIG);
	value |= XGMAC_CONFIG_TE;
	writel(value, ioaddr + XGMAC_TX_CONFIG);
}

static void dwxgmac2_dma_stop_tx(void __iomem *ioaddr, u32 chan)
{
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
	value &= ~XGMAC_TXST;
	writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));

	value = readl(ioaddr + XGMAC_TX_CONFIG);
	value &= ~XGMAC_CONFIG_TE;
	writel(value, ioaddr + XGMAC_TX_CONFIG);
}

static void dwxgmac2_dma_start_rx(void __iomem *ioaddr, u32 chan)
{
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
	value |= XGMAC_RXST;
	writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));

	value = readl(ioaddr + XGMAC_RX_CONFIG);
	value |= XGMAC_CONFIG_RE;
	writel(value, ioaddr + XGMAC_RX_CONFIG);
}

static void dwxgmac2_dma_stop_rx(void __iomem *ioaddr, u32 chan)
{
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
	value &= ~XGMAC_RXST;
	writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));

	value = readl(ioaddr + XGMAC_RX_CONFIG);
	value &= ~XGMAC_CONFIG_RE;
	writel(value, ioaddr + XGMAC_RX_CONFIG);
}

static int dwxgmac2_dma_interrupt(void __iomem *ioaddr,
				  struct stmmac_extra_stats *x, u32 chan)
{
	u32 intr_status = readl(ioaddr + XGMAC_DMA_CH_STATUS(chan));
	int ret = 0;

	/* ABNORMAL interrupts */
	if (unlikely(intr_status & XGMAC_AIS)) {
		if (unlikely(intr_status & XGMAC_TPS)) {
			x->tx_process_stopped_irq++;
			ret |= tx_hard_error;
		}
		if (unlikely(intr_status & XGMAC_FBE)) {
			x->fatal_bus_error_irq++;
			ret |= tx_hard_error;
		}
	}

	/* TX/RX NORMAL interrupts */
	if (likely(intr_status & XGMAC_NIS)) {
		x->normal_irq_n++;

		if (likely(intr_status & XGMAC_RI)) {
			u32 value = readl(ioaddr + XGMAC_DMA_CH_INT_EN(chan));
			if (likely(value & XGMAC_RIE)) {
				x->rx_normal_irq_n++;
				ret |= handle_rx;
			}
		}
		if (likely(intr_status & XGMAC_TI)) {
			x->tx_normal_irq_n++;
			ret |= handle_tx;
		}
	}

	/* Clear interrupts */
	writel(~0x0, ioaddr + XGMAC_DMA_CH_STATUS(chan));

	return ret;
}

static void dwxgmac2_get_hw_feature(void __iomem *ioaddr,
				    struct dma_features *dma_cap)
{
	u32 hw_cap;

	/*  MAC HW feature 0 */
	hw_cap = readl(ioaddr + XGMAC_HW_FEATURE0);
	dma_cap->rx_coe = (hw_cap & XGMAC_HWFEAT_RXCOESEL) >> 16;
	dma_cap->tx_coe = (hw_cap & XGMAC_HWFEAT_TXCOESEL) >> 14;
	dma_cap->atime_stamp = (hw_cap & XGMAC_HWFEAT_TSSEL) >> 12;
	dma_cap->av = (hw_cap & XGMAC_HWFEAT_AVSEL) >> 11;
	dma_cap->av &= (hw_cap & XGMAC_HWFEAT_RAVSEL) >> 10;
	dma_cap->pmt_magic_frame = (hw_cap & XGMAC_HWFEAT_MGKSEL) >> 7;
	dma_cap->pmt_remote_wake_up = (hw_cap & XGMAC_HWFEAT_RWKSEL) >> 6;
	dma_cap->mbps_1000 = (hw_cap & XGMAC_HWFEAT_GMIISEL) >> 1;

	/* MAC HW feature 1 */
	hw_cap = readl(ioaddr + XGMAC_HW_FEATURE1);
	dma_cap->tsoen = (hw_cap & XGMAC_HWFEAT_TSOEN) >> 18;
	dma_cap->tx_fifo_size =
		128 << ((hw_cap & XGMAC_HWFEAT_TXFIFOSIZE) >> 6);
	dma_cap->rx_fifo_size =
		128 << ((hw_cap & XGMAC_HWFEAT_RXFIFOSIZE) >> 0);

	/* MAC HW feature 2 */
	hw_cap = readl(ioaddr + XGMAC_HW_FEATURE2);
	dma_cap->pps_out_num = (hw_cap & XGMAC_HWFEAT_PPSOUTNUM) >> 24;
	dma_cap->number_tx_channel =
		((hw_cap & XGMAC_HWFEAT_TXCHCNT) >> 18) + 1;
	dma_cap->number_rx_channel =
		((hw_cap & XGMAC_HWFEAT_RXCHCNT) >> 12) + 1;
	dma_cap->number_tx_queues =
		((hw_cap & XGMAC_HWFEAT_TXQCNT) >> 6) + 1;
	dma_cap->number_rx_queues =
		((hw_cap & XGMAC_HWFEAT_RXQCNT) >> 0) + 1;
}

static void dwxgmac2_rx_watchdog(void __iomem *ioaddr, u32 riwt, u32 nchan)
{
	u32 i;

	for (i = 0; i < nchan; i++)
		writel(riwt & XGMAC_RWT, ioaddr + XGMAC_DMA_CH_Rx_WATCHDOG(i));
}

static void dwxgmac2_set_rx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)
{
	writel(len, ioaddr + XGMAC_DMA_CH_RxDESC_RING_LEN(chan));
}

static void dwxgmac2_set_tx_ring_len(void __iomem *ioaddr, u32 len, u32 chan)
{
	writel(len, ioaddr + XGMAC_DMA_CH_TxDESC_RING_LEN(chan));
}

static void dwxgmac2_set_rx_tail_ptr(void __iomem *ioaddr, u32 ptr, u32 chan)
{
	writel(ptr, ioaddr + XGMAC_DMA_CH_RxDESC_TAIL_LPTR(chan));
}

static void dwxgmac2_set_tx_tail_ptr(void __iomem *ioaddr, u32 ptr, u32 chan)
{
	writel(ptr, ioaddr + XGMAC_DMA_CH_TxDESC_TAIL_LPTR(chan));
}

static void dwxgmac2_enable_tso(void __iomem *ioaddr, bool en, u32 chan)
{
	u32 value = readl(ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));

	if (en)
		value |= XGMAC_TSE;
	else
		value &= ~XGMAC_TSE;

	writel(value, ioaddr + XGMAC_DMA_CH_TX_CONTROL(chan));
}

static void dwxgmac2_set_bfsize(void __iomem *ioaddr, int bfsize, u32 chan)
{
	u32 value;

	value = readl(ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
	value |= bfsize << 1;
	writel(value, ioaddr + XGMAC_DMA_CH_RX_CONTROL(chan));
}

const struct stmmac_dma_ops dwxgmac210_dma_ops = {
	.reset = dwxgmac2_dma_reset,
	.init = dwxgmac2_dma_init,
	.init_chan = dwxgmac2_dma_init_chan,
	.init_rx_chan = dwxgmac2_dma_init_rx_chan,
	.init_tx_chan = dwxgmac2_dma_init_tx_chan,
	.axi = dwxgmac2_dma_axi,
	.dump_regs = NULL,
	.dma_rx_mode = dwxgmac2_dma_rx_mode,
	.dma_tx_mode = dwxgmac2_dma_tx_mode,
	.enable_dma_irq = dwxgmac2_enable_dma_irq,
	.disable_dma_irq = dwxgmac2_disable_dma_irq,
	.start_tx = dwxgmac2_dma_start_tx,
	.stop_tx = dwxgmac2_dma_stop_tx,
	.start_rx = dwxgmac2_dma_start_rx,
	.stop_rx = dwxgmac2_dma_stop_rx,
	.dma_interrupt = dwxgmac2_dma_interrupt,
	.get_hw_feature = dwxgmac2_get_hw_feature,
	.rx_watchdog = dwxgmac2_rx_watchdog,
	.set_rx_ring_len = dwxgmac2_set_rx_ring_len,
	.set_tx_ring_len = dwxgmac2_set_tx_ring_len,
	.set_rx_tail_ptr = dwxgmac2_set_rx_tail_ptr,
	.set_tx_tail_ptr = dwxgmac2_set_tx_tail_ptr,
	.enable_tso = dwxgmac2_enable_tso,
	.set_bfsize = dwxgmac2_set_bfsize,
};