gianfar: Add Multiple Queue Support
[linux-2.6.git] / drivers / net / gianfar_sysfs.c
1 /*
2  * drivers/net/gianfar_sysfs.c
3  *
4  * Gianfar Ethernet Driver
5  * This driver is designed for the non-CPM ethernet controllers
6  * on the 85xx and 83xx family of integrated processors
7  * Based on 8260_io/fcc_enet.c
8  *
9  * Author: Andy Fleming
10  * Maintainer: Kumar Gala (galak@kernel.crashing.org)
11  * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
12  *
13  * Copyright 2002-2009 Freescale Semiconductor, Inc.
14  *
15  * This program is free software; you can redistribute  it and/or modify it
16  * under  the terms of  the GNU General  Public License as published by the
17  * Free Software Foundation;  either version 2 of the  License, or (at your
18  * option) any later version.
19  *
20  * Sysfs file creation and management
21  */
22
23 #include <linux/kernel.h>
24 #include <linux/string.h>
25 #include <linux/errno.h>
26 #include <linux/unistd.h>
27 #include <linux/slab.h>
28 #include <linux/init.h>
29 #include <linux/delay.h>
30 #include <linux/etherdevice.h>
31 #include <linux/spinlock.h>
32 #include <linux/mm.h>
33 #include <linux/device.h>
34
35 #include <asm/uaccess.h>
36 #include <linux/module.h>
37
38 #include "gianfar.h"
39
40 static ssize_t gfar_show_bd_stash(struct device *dev,
41                                   struct device_attribute *attr, char *buf)
42 {
43         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
44
45         return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
46 }
47
48 static ssize_t gfar_set_bd_stash(struct device *dev,
49                                  struct device_attribute *attr,
50                                  const char *buf, size_t count)
51 {
52         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
53         struct gfar __iomem *regs = priv->gfargrp.regs;
54         int new_setting = 0;
55         u32 temp;
56         unsigned long flags;
57
58         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
59                 return count;
60
61
62         /* Find out the new setting */
63         if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
64                 new_setting = 1;
65         else if (!strncmp("off", buf, count - 1)
66                  || !strncmp("0", buf, count - 1))
67                 new_setting = 0;
68         else
69                 return count;
70
71
72         local_irq_save(flags);
73         lock_rx_qs(priv);
74
75         /* Set the new stashing value */
76         priv->bd_stash_en = new_setting;
77
78         temp = gfar_read(&regs->attr);
79
80         if (new_setting)
81                 temp |= ATTR_BDSTASH;
82         else
83                 temp &= ~(ATTR_BDSTASH);
84
85         gfar_write(&regs->attr, temp);
86
87         unlock_rx_qs(priv);
88         local_irq_restore(flags);
89
90         return count;
91 }
92
93 static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);
94
95 static ssize_t gfar_show_rx_stash_size(struct device *dev,
96                                        struct device_attribute *attr, char *buf)
97 {
98         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
99
100         return sprintf(buf, "%d\n", priv->rx_stash_size);
101 }
102
103 static ssize_t gfar_set_rx_stash_size(struct device *dev,
104                                       struct device_attribute *attr,
105                                       const char *buf, size_t count)
106 {
107         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
108         struct gfar __iomem *regs = priv->gfargrp.regs;
109         unsigned int length = simple_strtoul(buf, NULL, 0);
110         u32 temp;
111         unsigned long flags;
112
113         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
114                 return count;
115
116         local_irq_save(flags);
117         lock_rx_qs(priv);
118
119         if (length > priv->rx_buffer_size)
120                 goto out;
121
122         if (length == priv->rx_stash_size)
123                 goto out;
124
125         priv->rx_stash_size = length;
126
127         temp = gfar_read(&regs->attreli);
128         temp &= ~ATTRELI_EL_MASK;
129         temp |= ATTRELI_EL(length);
130         gfar_write(&regs->attreli, temp);
131
132         /* Turn stashing on/off as appropriate */
133         temp = gfar_read(&regs->attr);
134
135         if (length)
136                 temp |= ATTR_BUFSTASH;
137         else
138                 temp &= ~(ATTR_BUFSTASH);
139
140         gfar_write(&regs->attr, temp);
141
142 out:
143         unlock_rx_qs(priv);
144         local_irq_restore(flags);
145
146         return count;
147 }
148
149 static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
150                    gfar_set_rx_stash_size);
151
152 /* Stashing will only be enabled when rx_stash_size != 0 */
153 static ssize_t gfar_show_rx_stash_index(struct device *dev,
154                                         struct device_attribute *attr,
155                                         char *buf)
156 {
157         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
158
159         return sprintf(buf, "%d\n", priv->rx_stash_index);
160 }
161
162 static ssize_t gfar_set_rx_stash_index(struct device *dev,
163                                        struct device_attribute *attr,
164                                        const char *buf, size_t count)
165 {
166         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
167         struct gfar __iomem *regs = priv->gfargrp.regs;
168         unsigned short index = simple_strtoul(buf, NULL, 0);
169         u32 temp;
170         unsigned long flags;
171
172         if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
173                 return count;
174
175         local_irq_save(flags);
176         lock_rx_qs(priv);
177
178         if (index > priv->rx_stash_size)
179                 goto out;
180
181         if (index == priv->rx_stash_index)
182                 goto out;
183
184         priv->rx_stash_index = index;
185
186         temp = gfar_read(&regs->attreli);
187         temp &= ~ATTRELI_EI_MASK;
188         temp |= ATTRELI_EI(index);
189         gfar_write(&regs->attreli, flags);
190
191 out:
192         unlock_rx_qs(priv);
193         local_irq_restore(flags);
194
195         return count;
196 }
197
198 static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
199                    gfar_set_rx_stash_index);
200
201 static ssize_t gfar_show_fifo_threshold(struct device *dev,
202                                         struct device_attribute *attr,
203                                         char *buf)
204 {
205         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
206
207         return sprintf(buf, "%d\n", priv->fifo_threshold);
208 }
209
210 static ssize_t gfar_set_fifo_threshold(struct device *dev,
211                                        struct device_attribute *attr,
212                                        const char *buf, size_t count)
213 {
214         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
215         struct gfar __iomem *regs = priv->gfargrp.regs;
216         unsigned int length = simple_strtoul(buf, NULL, 0);
217         u32 temp;
218         unsigned long flags;
219
220         if (length > GFAR_MAX_FIFO_THRESHOLD)
221                 return count;
222
223         local_irq_save(flags);
224         lock_tx_qs(priv);
225
226         priv->fifo_threshold = length;
227
228         temp = gfar_read(&regs->fifo_tx_thr);
229         temp &= ~FIFO_TX_THR_MASK;
230         temp |= length;
231         gfar_write(&regs->fifo_tx_thr, temp);
232
233         unlock_tx_qs(priv);
234         local_irq_restore(flags);
235
236         return count;
237 }
238
239 static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
240                    gfar_set_fifo_threshold);
241
242 static ssize_t gfar_show_fifo_starve(struct device *dev,
243                                      struct device_attribute *attr, char *buf)
244 {
245         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
246
247         return sprintf(buf, "%d\n", priv->fifo_starve);
248 }
249
250 static ssize_t gfar_set_fifo_starve(struct device *dev,
251                                     struct device_attribute *attr,
252                                     const char *buf, size_t count)
253 {
254         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
255         struct gfar __iomem *regs = priv->gfargrp.regs;
256         unsigned int num = simple_strtoul(buf, NULL, 0);
257         u32 temp;
258         unsigned long flags;
259
260         if (num > GFAR_MAX_FIFO_STARVE)
261                 return count;
262
263         local_irq_save(flags);
264         lock_tx_qs(priv);
265
266         priv->fifo_starve = num;
267
268         temp = gfar_read(&regs->fifo_tx_starve);
269         temp &= ~FIFO_TX_STARVE_MASK;
270         temp |= num;
271         gfar_write(&regs->fifo_tx_starve, temp);
272
273         unlock_tx_qs(priv);
274         local_irq_restore(flags);
275
276         return count;
277 }
278
279 static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
280                    gfar_set_fifo_starve);
281
282 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
283                                          struct device_attribute *attr,
284                                          char *buf)
285 {
286         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
287
288         return sprintf(buf, "%d\n", priv->fifo_starve_off);
289 }
290
291 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
292                                         struct device_attribute *attr,
293                                         const char *buf, size_t count)
294 {
295         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
296         struct gfar __iomem *regs = priv->gfargrp.regs;
297         unsigned int num = simple_strtoul(buf, NULL, 0);
298         u32 temp;
299         unsigned long flags;
300
301         if (num > GFAR_MAX_FIFO_STARVE_OFF)
302                 return count;
303
304         local_irq_save(flags);
305         lock_tx_qs(priv);
306
307         priv->fifo_starve_off = num;
308
309         temp = gfar_read(&regs->fifo_tx_starve_shutoff);
310         temp &= ~FIFO_TX_STARVE_OFF_MASK;
311         temp |= num;
312         gfar_write(&regs->fifo_tx_starve_shutoff, temp);
313
314         unlock_tx_qs(priv);
315         local_irq_restore(flags);
316
317         return count;
318 }
319
320 static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
321                    gfar_set_fifo_starve_off);
322
323 void gfar_init_sysfs(struct net_device *dev)
324 {
325         struct gfar_private *priv = netdev_priv(dev);
326         int rc;
327
328         /* Initialize the default values */
329         priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
330         priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
331         priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
332
333         /* Create our sysfs files */
334         rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
335         rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
336         rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
337         rc |= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
338         rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve);
339         rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
340         if (rc)
341                 dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
342 }