summaryrefslogtreecommitdiffstats
path: root/target/linux/lantiq/patches-3.2/0044-MIPS-NET-several-fixes-to-etop-driver.patch
blob: dbb205be630fac8c1641635e4e303f1f51558864 (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
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
From 06663beb0230c02d1962eca8d9f6709c2e852328 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 21 Mar 2012 18:14:06 +0100
Subject: [PATCH 44/70] MIPS: NET: several fixes to etop driver

---
 drivers/net/ethernet/lantiq_etop.c |  208 +++++++++++++++++++-----------------
 1 files changed, 108 insertions(+), 100 deletions(-)

diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c
index a084d74..1a807d8 100644
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -103,15 +103,6 @@
 /* the newer xway socks have a embedded 3/7 port gbit multiplexer */
 #define ltq_has_gbit()		(ltq_is_ar9() || ltq_is_vr9())
 
-/* use 2 static channels for TX/RX
-   depending on the SoC we need to use different DMA channels for ethernet */
-#define LTQ_ETOP_TX_CHANNEL	1
-#define LTQ_ETOP_RX_CHANNEL	((ltq_is_ase()) ? (5) : \
-				((ltq_has_gbit()) ? (0) : (6)))
-
-#define IS_TX(x)		(x == LTQ_ETOP_TX_CHANNEL)
-#define IS_RX(x)		(x == LTQ_ETOP_RX_CHANNEL)
-
 #define ltq_etop_r32(x)		ltq_r32(ltq_etop_membase + (x))
 #define ltq_etop_w32(x, y)	ltq_w32(x, ltq_etop_membase + (y))
 #define ltq_etop_w32_mask(x, y, z)	\
@@ -128,8 +119,8 @@ static void __iomem *ltq_etop_membase;
 static void __iomem *ltq_gbit_membase;
 
 struct ltq_etop_chan {
-	int idx;
 	int tx_free;
+	int irq;
 	struct net_device *netdev;
 	struct napi_struct napi;
 	struct ltq_dma_channel dma;
@@ -144,8 +135,8 @@ struct ltq_etop_priv {
 	struct mii_bus *mii_bus;
 	struct phy_device *phydev;
 
-	struct ltq_etop_chan ch[MAX_DMA_CHAN];
-	int tx_free[MAX_DMA_CHAN >> 1];
+	struct ltq_etop_chan txch;
+	struct ltq_etop_chan rxch;
 
 	spinlock_t lock;
 
@@ -206,8 +197,10 @@ ltq_etop_poll_rx(struct napi_struct *napi, int budget)
 {
 	struct ltq_etop_chan *ch = container_of(napi,
 				struct ltq_etop_chan, napi);
+	struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
 	int rx = 0;
 	int complete = 0;
+	unsigned long flags;
 
 	while ((rx < budget) && !complete) {
 		struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
@@ -221,7 +214,9 @@ ltq_etop_poll_rx(struct napi_struct *napi, int budget)
 	}
 	if (complete || !rx) {
 		napi_complete(&ch->napi);
+		spin_lock_irqsave(&priv->lock, flags);
 		ltq_dma_ack_irq(&ch->dma);
+		spin_unlock_irqrestore(&priv->lock, flags);
 	}
 	return rx;
 }
@@ -233,7 +228,7 @@ ltq_etop_poll_tx(struct napi_struct *napi, int budget)
 		container_of(napi, struct ltq_etop_chan, napi);
 	struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
 	struct netdev_queue *txq =
-		netdev_get_tx_queue(ch->netdev, ch->idx >> 1);
+		netdev_get_tx_queue(ch->netdev, ch->dma.nr >> 1);
 	unsigned long flags;
 
 	spin_lock_irqsave(&priv->lock, flags);
@@ -251,7 +246,9 @@ ltq_etop_poll_tx(struct napi_struct *napi, int budget)
 	if (netif_tx_queue_stopped(txq))
 		netif_tx_start_queue(txq);
 	napi_complete(&ch->napi);
+	spin_lock_irqsave(&priv->lock, flags);
 	ltq_dma_ack_irq(&ch->dma);
+	spin_unlock_irqrestore(&priv->lock, flags);
 	return 1;
 }
 
@@ -259,9 +256,10 @@ static irqreturn_t
 ltq_etop_dma_irq(int irq, void *_priv)
 {
 	struct ltq_etop_priv *priv = _priv;
-	int ch = irq - LTQ_DMA_ETOP;
-
-	napi_schedule(&priv->ch[ch].napi);
+	if (irq == priv->txch.dma.irq)
+		napi_schedule(&priv->txch.napi);
+	else
+		napi_schedule(&priv->rxch.napi);
 	return IRQ_HANDLED;
 }
 
@@ -273,7 +271,7 @@ ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
 	ltq_dma_free(&ch->dma);
 	if (ch->dma.irq)
 		free_irq(ch->dma.irq, priv);
-	if (IS_RX(ch->idx)) {
+	if (ch == &priv->txch) {
 		int desc;
 		for (desc = 0; desc < LTQ_DESC_NUM; desc++)
 			dev_kfree_skb_any(ch->skb[ch->dma.desc]);
@@ -284,7 +282,6 @@ static void
 ltq_etop_hw_exit(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
-	int i;
 
 	clk_disable(priv->clk_ppe);
 
@@ -296,9 +293,8 @@ ltq_etop_hw_exit(struct net_device *dev)
 		clk_disable(priv->clk_ephycgu);
 	}
 
-	for (i = 0; i < MAX_DMA_CHAN; i++)
-		if (IS_TX(i) || IS_RX(i))
-			ltq_etop_free_channel(dev, &priv->ch[i]);
+	ltq_etop_free_channel(dev, &priv->txch);
+	ltq_etop_free_channel(dev, &priv->rxch);
 }
 
 static void
@@ -326,8 +322,6 @@ ltq_etop_hw_init(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
 	unsigned int mii_mode = priv->pldata->mii_mode;
-	int err = 0;
-	int i;
 
 	clk_enable(priv->clk_ppe);
 
@@ -369,31 +363,50 @@ ltq_etop_hw_init(struct net_device *dev)
 	/* enable crc generation */
 	ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
 
+	return 0;
+}
+
+static int
+ltq_etop_dma_init(struct net_device *dev)
+{
+	struct ltq_etop_priv *priv = netdev_priv(dev);
+	int tx = 1;
+	int rx = ((ltq_is_ase()) ? (5) : \
+		((ltq_is_ar9()) ? (0) : (6)));
+	int tx_irq = LTQ_DMA_ETOP + tx;
+	int rx_irq = LTQ_DMA_ETOP + rx;
+	int err;
+
 	ltq_dma_init_port(DMA_PORT_ETOP);
 
-	for (i = 0; i < MAX_DMA_CHAN && !err; i++) {
-		int irq = LTQ_DMA_ETOP + i;
-		struct ltq_etop_chan *ch = &priv->ch[i];
-
-		ch->idx = ch->dma.nr = i;
-
-		if (IS_TX(i)) {
-			ltq_dma_alloc_tx(&ch->dma);
-			err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
-				"etop_tx", priv);
-		} else if (IS_RX(i)) {
-			ltq_dma_alloc_rx(&ch->dma);
-			for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
-					ch->dma.desc++)
-				if (ltq_etop_alloc_skb(ch))
-					err = -ENOMEM;
-			ch->dma.desc = 0;
-			err = request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
-				"etop_rx", priv);
+	priv->txch.dma.nr = tx;
+	ltq_dma_alloc_tx(&priv->txch.dma);
+	err = request_irq(tx_irq, ltq_etop_dma_irq, IRQF_DISABLED,
+		"eth_tx", priv);
+	if (err) {
+		netdev_err(dev, "failed to allocate tx irq\n");
+		goto err_out;
+	}
+	priv->txch.dma.irq = tx_irq;
+
+	priv->rxch.dma.nr = rx;
+	ltq_dma_alloc_rx(&priv->rxch.dma);
+	for (priv->rxch.dma.desc = 0; priv->rxch.dma.desc < LTQ_DESC_NUM;
+			priv->rxch.dma.desc++) {
+		if (ltq_etop_alloc_skb(&priv->rxch)) {
+			netdev_err(dev, "failed to allocate skbs\n");
+			err = -ENOMEM;
+			goto err_out;
 		}
-		if (!err)
-			ch->dma.irq = irq;
 	}
+	priv->rxch.dma.desc = 0;
+	err = request_irq(rx_irq, ltq_etop_dma_irq, IRQF_DISABLED,
+		"eth_rx", priv);
+	if (err)
+		netdev_err(dev, "failed to allocate rx irq\n");
+	else
+		priv->rxch.dma.irq = rx_irq;
+err_out:
 	return err;
 }
 
@@ -410,7 +423,10 @@ ltq_etop_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
 
-	return phy_ethtool_gset(priv->phydev, cmd);
+	if (priv->phydev)
+		return phy_ethtool_gset(priv->phydev, cmd);
+	else
+		return 0;
 }
 
 static int
@@ -418,7 +434,10 @@ ltq_etop_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
 
-	return phy_ethtool_sset(priv->phydev, cmd);
+	if (priv->phydev)
+		return phy_ethtool_sset(priv->phydev, cmd);
+	else
+		return 0;
 }
 
 static int
@@ -426,7 +445,10 @@ ltq_etop_nway_reset(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
 
-	return phy_start_aneg(priv->phydev);
+	if (priv->phydev)
+		return phy_start_aneg(priv->phydev);
+	else
+		return 0;
 }
 
 static const struct ethtool_ops ltq_etop_ethtool_ops = {
@@ -618,18 +640,19 @@ static int
 ltq_etop_open(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
-	int i;
+	unsigned long flags;
 
-	for (i = 0; i < MAX_DMA_CHAN; i++) {
-		struct ltq_etop_chan *ch = &priv->ch[i];
+	napi_enable(&priv->txch.napi);
+	napi_enable(&priv->rxch.napi);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	ltq_dma_open(&priv->txch.dma);
+	ltq_dma_open(&priv->rxch.dma);
+	spin_unlock_irqrestore(&priv->lock, flags);
 
-		if (!IS_TX(i) && (!IS_RX(i)))
-			continue;
-		ltq_dma_open(&ch->dma);
-		napi_enable(&ch->napi);
-	}
 	if (priv->phydev)
 		phy_start(priv->phydev);
+
 	netif_tx_start_all_queues(dev);
 	return 0;
 }
@@ -638,19 +661,19 @@ static int
 ltq_etop_stop(struct net_device *dev)
 {
 	struct ltq_etop_priv *priv = netdev_priv(dev);
-	int i;
+	unsigned long flags;
 
 	netif_tx_stop_all_queues(dev);
 	if (priv->phydev)
 		phy_stop(priv->phydev);
-	for (i = 0; i < MAX_DMA_CHAN; i++) {
-		struct ltq_etop_chan *ch = &priv->ch[i];
+	napi_disable(&priv->txch.napi);
+	napi_disable(&priv->rxch.napi);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	ltq_dma_close(&priv->txch.dma);
+	ltq_dma_close(&priv->rxch.dma);
+	spin_unlock_irqrestore(&priv->lock, flags);
 
-		if (!IS_RX(i) && !IS_TX(i))
-			continue;
-		napi_disable(&ch->napi);
-		ltq_dma_close(&ch->dma);
-	}
 	return 0;
 }
 
@@ -660,16 +683,16 @@ ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
 	int queue = skb_get_queue_mapping(skb);
 	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue);
 	struct ltq_etop_priv *priv = netdev_priv(dev);
-	struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1];
-	struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
+	struct ltq_dma_desc *desc =
+		&priv->txch.dma.desc_base[priv->txch.dma.desc];
 	unsigned long flags;
 	u32 byte_offset;
 	int len;
 
 	len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
 
-	if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {
-		dev_kfree_skb_any(skb);
+	if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) ||
+			priv->txch.skb[priv->txch.dma.desc]) {
 		netdev_err(dev, "tx ring full\n");
 		netif_tx_stop_queue(txq);
 		return NETDEV_TX_BUSY;
@@ -677,7 +700,7 @@ ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
 
 	/* dma needs to start on a 16 byte aligned address */
 	byte_offset = CPHYSADDR(skb->data) % 16;
-	ch->skb[ch->dma.desc] = skb;
+	priv->txch.skb[priv->txch.dma.desc] = skb;
 
 	dev->trans_start = jiffies;
 
@@ -687,11 +710,11 @@ ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
 	wmb();
 	desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |
 		LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);
-	ch->dma.desc++;
-	ch->dma.desc %= LTQ_DESC_NUM;
+	priv->txch.dma.desc++;
+	priv->txch.dma.desc %= LTQ_DESC_NUM;
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN)
+	if (priv->txch.dma.desc_base[priv->txch.dma.desc].ctl & LTQ_DMA_OWN)
 		netif_tx_stop_queue(txq);
 
 	return NETDEV_TX_OK;
@@ -776,6 +799,10 @@ ltq_etop_init(struct net_device *dev)
 	err = ltq_etop_hw_init(dev);
 	if (err)
 		goto err_hw;
+	err = ltq_etop_dma_init(dev);
+	if (err)
+		goto err_hw;
+
 	ltq_etop_change_mtu(dev, 1500);
 
 	memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
@@ -811,6 +838,9 @@ ltq_etop_tx_timeout(struct net_device *dev)
 	err = ltq_etop_hw_init(dev);
 	if (err)
 		goto err_hw;
+	err = ltq_etop_dma_init(dev);
+	if (err)
+		goto err_hw;
 	dev->trans_start = jiffies;
 	netif_wake_queue(dev);
 	return;
@@ -834,14 +864,13 @@ static const struct net_device_ops ltq_eth_netdev_ops = {
 	.ndo_tx_timeout = ltq_etop_tx_timeout,
 };
 
-static int __init
+static int __devinit
 ltq_etop_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct ltq_etop_priv *priv;
 	struct resource *res, *gbit_res;
 	int err;
-	int i;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
@@ -917,15 +946,10 @@ ltq_etop_probe(struct platform_device *pdev)
 
 	spin_lock_init(&priv->lock);
 
-	for (i = 0; i < MAX_DMA_CHAN; i++) {
-		if (IS_TX(i))
-			netif_napi_add(dev, &priv->ch[i].napi,
-				ltq_etop_poll_tx, 8);
-		else if (IS_RX(i))
-			netif_napi_add(dev, &priv->ch[i].napi,
-				ltq_etop_poll_rx, 32);
-		priv->ch[i].netdev = dev;
-	}
+	netif_napi_add(dev, &priv->txch.napi, ltq_etop_poll_tx, 8);
+	netif_napi_add(dev, &priv->rxch.napi, ltq_etop_poll_rx, 32);
+	priv->txch.netdev = dev;
+	priv->rxch.netdev = dev;
 
 	err = register_netdev(dev);
 	if (err)
@@ -955,6 +979,7 @@ ltq_etop_remove(struct platform_device *pdev)
 }
 
 static struct platform_driver ltq_mii_driver = {
+	.probe = ltq_etop_probe,
 	.remove = __devexit_p(ltq_etop_remove),
 	.driver = {
 		.name = "ltq_etop",
@@ -962,24 +987,7 @@ static struct platform_driver ltq_mii_driver = {
 	},
 };
 
-int __init
-init_ltq_etop(void)
-{
-	int ret = platform_driver_probe(&ltq_mii_driver, ltq_etop_probe);
-
-	if (ret)
-		pr_err("ltq_etop: Error registering platfom driver!");
-	return ret;
-}
-
-static void __exit
-exit_ltq_etop(void)
-{
-	platform_driver_unregister(&ltq_mii_driver);
-}
-
-module_init(init_ltq_etop);
-module_exit(exit_ltq_etop);
+module_platform_driver(ltq_mii_driver);
 
 MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 MODULE_DESCRIPTION("Lantiq SoC ETOP");
-- 
1.7.7.1