blob: b98c6c512299d94305f71a57e072dcadd072a409 [file] [log] [blame]
Andy Fleming7f7f5312005-11-11 12:38:59 -06001/*
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
Adrian Bunkb56d55b2006-01-11 02:00:10 +010010 * Maintainer: Kumar Gala (galak@kernel.crashing.org)
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000011 * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
Andy Fleming7f7f5312005-11-11 12:38:59 -060012 *
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000013 * Copyright 2002-2009 Freescale Semiconductor, Inc.
Andy Fleming7f7f5312005-11-11 12:38:59 -060014 *
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
Andy Fleming7f7f5312005-11-11 12:38:59 -060023#include <linux/kernel.h>
Andy Fleming7f7f5312005-11-11 12:38:59 -060024#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>
Andy Fleming7f7f5312005-11-11 12:38:59 -060037
38#include "gianfar.h"
39
Kumar Gala4409d282007-02-12 23:40:06 -060040static ssize_t gfar_show_bd_stash(struct device *dev,
41 struct device_attribute *attr, char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -060042{
Kumar Gala4409d282007-02-12 23:40:06 -060043 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -060044
Kumar Gala4409d282007-02-12 23:40:06 -060045 return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
Andy Fleming7f7f5312005-11-11 12:38:59 -060046}
47
Kumar Gala4409d282007-02-12 23:40:06 -060048static ssize_t gfar_set_bd_stash(struct device *dev,
49 struct device_attribute *attr,
50 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -060051{
Kumar Gala4409d282007-02-12 23:40:06 -060052 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +000053 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -060054 int new_setting = 0;
55 u32 temp;
56 unsigned long flags;
57
Andy Fleming4d7902f2009-02-04 16:43:44 -080058 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
59 return count;
60
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +000061
Andy Fleming7f7f5312005-11-11 12:38:59 -060062 /* Find out the new setting */
Kumar Gala4409d282007-02-12 23:40:06 -060063 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
Andy Fleming7f7f5312005-11-11 12:38:59 -060064 new_setting = 1;
Joe Perches8e95a202009-12-03 07:58:21 +000065 else if (!strncmp("off", buf, count - 1) ||
66 !strncmp("0", buf, count - 1))
Andy Fleming7f7f5312005-11-11 12:38:59 -060067 new_setting = 0;
68 else
69 return count;
70
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +000071
72 local_irq_save(flags);
73 lock_rx_qs(priv);
Andy Fleming7f7f5312005-11-11 12:38:59 -060074
75 /* Set the new stashing value */
76 priv->bd_stash_en = new_setting;
77
Sandeep Gopalpetf4983702009-11-02 07:03:09 +000078 temp = gfar_read(&regs->attr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -040079
Andy Fleming7f7f5312005-11-11 12:38:59 -060080 if (new_setting)
81 temp |= ATTR_BDSTASH;
82 else
83 temp &= ~(ATTR_BDSTASH);
84
Sandeep Gopalpetf4983702009-11-02 07:03:09 +000085 gfar_write(&regs->attr, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -060086
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +000087 unlock_rx_qs(priv);
88 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -060089
90 return count;
91}
92
Anton Vorontsovb2f66d12009-02-01 00:54:16 -080093static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);
Grant Likely35a84fd2007-12-01 22:12:45 -070094
Kumar Gala4409d282007-02-12 23:40:06 -060095static ssize_t gfar_show_rx_stash_size(struct device *dev,
96 struct device_attribute *attr, char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -060097{
Kumar Gala4409d282007-02-12 23:40:06 -060098 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -060099
100 return sprintf(buf, "%d\n", priv->rx_stash_size);
101}
102
Kumar Gala4409d282007-02-12 23:40:06 -0600103static ssize_t gfar_set_rx_stash_size(struct device *dev,
104 struct device_attribute *attr,
105 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600106{
Kumar Gala4409d282007-02-12 23:40:06 -0600107 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000108 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600109 unsigned int length = simple_strtoul(buf, NULL, 0);
110 u32 temp;
111 unsigned long flags;
112
Andy Fleming4d7902f2009-02-04 16:43:44 -0800113 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
114 return count;
115
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000116 local_irq_save(flags);
117 lock_rx_qs(priv);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000118
Andy Fleming7f7f5312005-11-11 12:38:59 -0600119 if (length > priv->rx_buffer_size)
Andy Flemingf162b9d2008-05-02 13:00:30 -0500120 goto out;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600121
122 if (length == priv->rx_stash_size)
Andy Flemingf162b9d2008-05-02 13:00:30 -0500123 goto out;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600124
125 priv->rx_stash_size = length;
126
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000127 temp = gfar_read(&regs->attreli);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600128 temp &= ~ATTRELI_EL_MASK;
129 temp |= ATTRELI_EL(length);
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000130 gfar_write(&regs->attreli, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600131
132 /* Turn stashing on/off as appropriate */
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000133 temp = gfar_read(&regs->attr);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600134
135 if (length)
136 temp |= ATTR_BUFSTASH;
137 else
138 temp &= ~(ATTR_BUFSTASH);
139
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000140 gfar_write(&regs->attr, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600141
Andy Flemingf162b9d2008-05-02 13:00:30 -0500142out:
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000143 unlock_rx_qs(priv);
144 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600145
146 return count;
147}
148
Anton Vorontsovb2f66d12009-02-01 00:54:16 -0800149static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
150 gfar_set_rx_stash_size);
Grant Likely35a84fd2007-12-01 22:12:45 -0700151
Andy Fleming7f7f5312005-11-11 12:38:59 -0600152/* Stashing will only be enabled when rx_stash_size != 0 */
Kumar Gala4409d282007-02-12 23:40:06 -0600153static ssize_t gfar_show_rx_stash_index(struct device *dev,
154 struct device_attribute *attr,
155 char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600156{
Kumar Gala4409d282007-02-12 23:40:06 -0600157 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -0600158
159 return sprintf(buf, "%d\n", priv->rx_stash_index);
160}
161
Kumar Gala4409d282007-02-12 23:40:06 -0600162static ssize_t gfar_set_rx_stash_index(struct device *dev,
163 struct device_attribute *attr,
164 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600165{
Kumar Gala4409d282007-02-12 23:40:06 -0600166 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000167 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600168 unsigned short index = simple_strtoul(buf, NULL, 0);
169 u32 temp;
170 unsigned long flags;
171
Andy Fleming4d7902f2009-02-04 16:43:44 -0800172 if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
173 return count;
174
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000175 local_irq_save(flags);
176 lock_rx_qs(priv);
Sandeep Gopalpeta12f8012009-11-02 07:03:00 +0000177
Andy Fleming7f7f5312005-11-11 12:38:59 -0600178 if (index > priv->rx_stash_size)
Andy Flemingf162b9d2008-05-02 13:00:30 -0500179 goto out;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600180
181 if (index == priv->rx_stash_index)
Andy Flemingf162b9d2008-05-02 13:00:30 -0500182 goto out;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600183
184 priv->rx_stash_index = index;
185
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000186 temp = gfar_read(&regs->attreli);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600187 temp &= ~ATTRELI_EI_MASK;
188 temp |= ATTRELI_EI(index);
Anton Vorontsov499428e2009-11-10 14:11:07 +0000189 gfar_write(&regs->attreli, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600190
Andy Flemingf162b9d2008-05-02 13:00:30 -0500191out:
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000192 unlock_rx_qs(priv);
193 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600194
195 return count;
196}
197
Anton Vorontsovb2f66d12009-02-01 00:54:16 -0800198static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
199 gfar_set_rx_stash_index);
Grant Likely35a84fd2007-12-01 22:12:45 -0700200
Kumar Gala4409d282007-02-12 23:40:06 -0600201static ssize_t gfar_show_fifo_threshold(struct device *dev,
202 struct device_attribute *attr,
203 char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600204{
Kumar Gala4409d282007-02-12 23:40:06 -0600205 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -0600206
207 return sprintf(buf, "%d\n", priv->fifo_threshold);
208}
209
Kumar Gala4409d282007-02-12 23:40:06 -0600210static ssize_t gfar_set_fifo_threshold(struct device *dev,
211 struct device_attribute *attr,
212 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600213{
Kumar Gala4409d282007-02-12 23:40:06 -0600214 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000215 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600216 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
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000223 local_irq_save(flags);
224 lock_tx_qs(priv);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600225
226 priv->fifo_threshold = length;
227
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000228 temp = gfar_read(&regs->fifo_tx_thr);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600229 temp &= ~FIFO_TX_THR_MASK;
230 temp |= length;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000231 gfar_write(&regs->fifo_tx_thr, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600232
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000233 unlock_tx_qs(priv);
234 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600235
236 return count;
237}
238
Anton Vorontsovb2f66d12009-02-01 00:54:16 -0800239static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
240 gfar_set_fifo_threshold);
Grant Likely35a84fd2007-12-01 22:12:45 -0700241
Kumar Gala4409d282007-02-12 23:40:06 -0600242static ssize_t gfar_show_fifo_starve(struct device *dev,
243 struct device_attribute *attr, char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600244{
Kumar Gala4409d282007-02-12 23:40:06 -0600245 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -0600246
247 return sprintf(buf, "%d\n", priv->fifo_starve);
248}
249
Kumar Gala4409d282007-02-12 23:40:06 -0600250static ssize_t gfar_set_fifo_starve(struct device *dev,
251 struct device_attribute *attr,
252 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600253{
Kumar Gala4409d282007-02-12 23:40:06 -0600254 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000255 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600256 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
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000263 local_irq_save(flags);
264 lock_tx_qs(priv);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600265
266 priv->fifo_starve = num;
267
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000268 temp = gfar_read(&regs->fifo_tx_starve);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600269 temp &= ~FIFO_TX_STARVE_MASK;
270 temp |= num;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000271 gfar_write(&regs->fifo_tx_starve, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600272
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000273 unlock_tx_qs(priv);
274 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600275
276 return count;
277}
278
Anton Vorontsovb2f66d12009-02-01 00:54:16 -0800279static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
280 gfar_set_fifo_starve);
Grant Likely35a84fd2007-12-01 22:12:45 -0700281
Kumar Gala4409d282007-02-12 23:40:06 -0600282static ssize_t gfar_show_fifo_starve_off(struct device *dev,
283 struct device_attribute *attr,
284 char *buf)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600285{
Kumar Gala4409d282007-02-12 23:40:06 -0600286 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Andy Fleming7f7f5312005-11-11 12:38:59 -0600287
288 return sprintf(buf, "%d\n", priv->fifo_starve_off);
289}
290
Kumar Gala4409d282007-02-12 23:40:06 -0600291static ssize_t gfar_set_fifo_starve_off(struct device *dev,
292 struct device_attribute *attr,
293 const char *buf, size_t count)
Andy Fleming7f7f5312005-11-11 12:38:59 -0600294{
Kumar Gala4409d282007-02-12 23:40:06 -0600295 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
Sandeep Gopalpet46ceb602009-11-02 07:03:34 +0000296 struct gfar __iomem *regs = priv->gfargrp[0].regs;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600297 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
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000304 local_irq_save(flags);
305 lock_tx_qs(priv);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600306
307 priv->fifo_starve_off = num;
308
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000309 temp = gfar_read(&regs->fifo_tx_starve_shutoff);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600310 temp &= ~FIFO_TX_STARVE_OFF_MASK;
311 temp |= num;
Sandeep Gopalpetf4983702009-11-02 07:03:09 +0000312 gfar_write(&regs->fifo_tx_starve_shutoff, temp);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600313
Sandeep Gopalpetfba4ed02009-11-02 07:03:15 +0000314 unlock_tx_qs(priv);
315 local_irq_restore(flags);
Andy Fleming7f7f5312005-11-11 12:38:59 -0600316
317 return count;
318}
319
Anton Vorontsovb2f66d12009-02-01 00:54:16 -0800320static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
321 gfar_set_fifo_starve_off);
Grant Likely35a84fd2007-12-01 22:12:45 -0700322
Andy Fleming7f7f5312005-11-11 12:38:59 -0600323void gfar_init_sysfs(struct net_device *dev)
324{
325 struct gfar_private *priv = netdev_priv(dev);
Grant Likely35a84fd2007-12-01 22:12:45 -0700326 int rc;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600327
328 /* Initialize the default values */
Andy Fleming7f7f5312005-11-11 12:38:59 -0600329 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;
Andy Fleming7f7f5312005-11-11 12:38:59 -0600332
333 /* Create our sysfs files */
Grant Likely35a84fd2007-12-01 22:12:45 -0700334 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");
Andy Fleming7f7f5312005-11-11 12:38:59 -0600342}