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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Ralf Baechlef90fdc32006-02-08 23:23:26 +00002 * Copyright (C) 2001,2002,2003,2004 Broadcom Corporation
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01003 * Copyright (c) 2006, 2007 Maciej W. Rozycki
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
Ralf Baechle74b02472005-10-19 15:40:02 +010014 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 *
19 *
20 * This driver is designed for the Broadcom SiByte SOC built-in
21 * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp.
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010022 *
23 * Updated to the driver model and the PHY abstraction layer
24 * by Maciej W. Rozycki.
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010026
27#include <linux/bug.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/module.h>
29#include <linux/kernel.h>
30#include <linux/string.h>
31#include <linux/timer.h>
32#include <linux/errno.h>
33#include <linux/ioport.h>
34#include <linux/slab.h>
35#include <linux/interrupt.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/skbuff.h>
39#include <linux/init.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/bitops.h>
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010041#include <linux/err.h>
42#include <linux/ethtool.h>
43#include <linux/mii.h>
44#include <linux/phy.h>
45#include <linux/platform_device.h>
Paul Gortmaker70c71602011-05-22 16:47:17 -040046#include <linux/prefetch.h>
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010047
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <asm/cache.h>
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010049#include <asm/io.h>
50#include <asm/processor.h> /* Processor type for cache alignment. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Linus Torvalds1da177e2005-04-16 15:20:36 -070052/* Operational parameters that usually are not changed. */
53
54#define CONFIG_SBMAC_COALESCE
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056/* Time in jiffies before concluding the transmitter is hung. */
57#define TX_TIMEOUT (2*HZ)
58
59
60MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)");
61MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver");
62
63/* A few user-configurable values which may be modified when a driver
64 module is loaded. */
65
66/* 1 normal messages, 0 quiet .. 7 verbose. */
67static int debug = 1;
68module_param(debug, int, S_IRUGO);
69MODULE_PARM_DESC(debug, "Debug messages");
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#ifdef CONFIG_SBMAC_COALESCE
Mark Mason693aa942007-04-26 00:23:22 -070072static int int_pktcnt_tx = 255;
73module_param(int_pktcnt_tx, int, S_IRUGO);
74MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count");
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Mark Mason693aa942007-04-26 00:23:22 -070076static int int_timeout_tx = 255;
77module_param(int_timeout_tx, int, S_IRUGO);
78MODULE_PARM_DESC(int_timeout_tx, "TX timeout value");
79
80static int int_pktcnt_rx = 64;
81module_param(int_pktcnt_rx, int, S_IRUGO);
82MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count");
83
84static int int_timeout_rx = 64;
85module_param(int_timeout_rx, int, S_IRUGO);
86MODULE_PARM_DESC(int_timeout_rx, "RX timeout value");
Linus Torvalds1da177e2005-04-16 15:20:36 -070087#endif
88
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +010089#include <asm/sibyte/board.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070090#include <asm/sibyte/sb1250.h>
Ralf Baechlef90fdc32006-02-08 23:23:26 +000091#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
92#include <asm/sibyte/bcm1480_regs.h>
93#include <asm/sibyte/bcm1480_int.h>
Mark Mason693aa942007-04-26 00:23:22 -070094#define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST
Ralf Baechlef90fdc32006-02-08 23:23:26 +000095#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
Linus Torvalds1da177e2005-04-16 15:20:36 -070096#include <asm/sibyte/sb1250_regs.h>
Ralf Baechlef90fdc32006-02-08 23:23:26 +000097#include <asm/sibyte/sb1250_int.h>
98#else
Thomas Weber0b1974d2010-09-23 11:46:48 +020099#error invalid SiByte MAC configuration
Ralf Baechlef90fdc32006-02-08 23:23:26 +0000100#endif
101#include <asm/sibyte/sb1250_scd.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102#include <asm/sibyte/sb1250_mac.h>
103#include <asm/sibyte/sb1250_dma.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Ralf Baechlef90fdc32006-02-08 23:23:26 +0000105#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
106#define UNIT_INT(n) (K_BCM1480_INT_MAC_0 + ((n) * 2))
107#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
108#define UNIT_INT(n) (K_INT_MAC_0 + (n))
109#else
Thomas Weber0b1974d2010-09-23 11:46:48 +0200110#error invalid SiByte MAC configuration
Ralf Baechlef90fdc32006-02-08 23:23:26 +0000111#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100113#ifdef K_INT_PHY
114#define SBMAC_PHY_INT K_INT_PHY
115#else
116#define SBMAC_PHY_INT PHY_POLL
117#endif
118
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119/**********************************************************************
120 * Simple types
121 ********************************************************************* */
122
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100123enum sbmac_speed {
124 sbmac_speed_none = 0,
125 sbmac_speed_10 = SPEED_10,
126 sbmac_speed_100 = SPEED_100,
127 sbmac_speed_1000 = SPEED_1000,
128};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100130enum sbmac_duplex {
131 sbmac_duplex_none = -1,
132 sbmac_duplex_half = DUPLEX_HALF,
133 sbmac_duplex_full = DUPLEX_FULL,
134};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100136enum sbmac_fc {
137 sbmac_fc_none,
138 sbmac_fc_disabled,
139 sbmac_fc_frame,
140 sbmac_fc_collision,
141 sbmac_fc_carrier,
142};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100144enum sbmac_state {
145 sbmac_state_uninit,
146 sbmac_state_off,
147 sbmac_state_on,
148 sbmac_state_broken,
149};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151
152/**********************************************************************
153 * Macros
154 ********************************************************************* */
155
156
157#define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \
158 (d)->sbdma_dscrtable : (d)->f+1)
159
160
161#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
162
Mark Mason693aa942007-04-26 00:23:22 -0700163#define SBMAC_MAX_TXDESCR 256
164#define SBMAC_MAX_RXDESCR 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Stephen Hemminger789585e2008-05-18 04:45:09 +0100166#define ETHER_ADDR_LEN 6
Ralf Baechle74b02472005-10-19 15:40:02 +0100167#define ENET_PACKET_SIZE 1518
168/*#define ENET_PACKET_SIZE 9216 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170/**********************************************************************
171 * DMA Descriptor structure
172 ********************************************************************* */
173
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100174struct sbdmadscr {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 uint64_t dscr_a;
176 uint64_t dscr_b;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100177};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178
179/**********************************************************************
180 * DMA Controller structure
181 ********************************************************************* */
182
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100183struct sbmacdma {
Ralf Baechle74b02472005-10-19 15:40:02 +0100184
185 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 * This stuff is used to identify the channel and the registers
187 * associated with it.
188 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100189 struct sbmac_softc *sbdma_eth; /* back pointer to associated
190 MAC */
191 int sbdma_channel; /* channel number */
192 int sbdma_txdir; /* direction (1=transmit) */
193 int sbdma_maxdescr; /* total # of descriptors
194 in ring */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195#ifdef CONFIG_SBMAC_COALESCE
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100196 int sbdma_int_pktcnt;
197 /* # descriptors rx/tx
198 before interrupt */
199 int sbdma_int_timeout;
200 /* # usec rx/tx interrupt */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201#endif
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100202 void __iomem *sbdma_config0; /* DMA config register 0 */
203 void __iomem *sbdma_config1; /* DMA config register 1 */
204 void __iomem *sbdma_dscrbase;
205 /* descriptor base address */
206 void __iomem *sbdma_dscrcnt; /* descriptor count register */
207 void __iomem *sbdma_curdscr; /* current descriptor
208 address */
209 void __iomem *sbdma_oodpktlost;
210 /* pkt drop (rx only) */
Ralf Baechle74b02472005-10-19 15:40:02 +0100211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 /*
213 * This stuff is for maintenance of the ring
214 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100215 void *sbdma_dscrtable_unaligned;
216 struct sbdmadscr *sbdma_dscrtable;
217 /* base of descriptor table */
218 struct sbdmadscr *sbdma_dscrtable_end;
219 /* end of descriptor table */
220 struct sk_buff **sbdma_ctxtable;
221 /* context table, one
222 per descr */
223 dma_addr_t sbdma_dscrtable_phys;
224 /* and also the phys addr */
225 struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */
226 struct sbdmadscr *sbdma_remptr; /* next dscr for sw
227 to remove */
228};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
230
231/**********************************************************************
232 * Ethernet softc structure
233 ********************************************************************* */
234
235struct sbmac_softc {
Ralf Baechle74b02472005-10-19 15:40:02 +0100236
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 /*
238 * Linux-specific things
239 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100240 struct net_device *sbm_dev; /* pointer to linux device */
241 struct napi_struct napi;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100242 struct phy_device *phy_dev; /* the associated PHY device */
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -0700243 struct mii_bus *mii_bus; /* the MII bus */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100244 int phy_irq[PHY_MAX_ADDR];
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100245 spinlock_t sbm_lock; /* spin lock */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100246 int sbm_devflags; /* current device flags */
Ralf Baechle74b02472005-10-19 15:40:02 +0100247
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 /*
249 * Controller-specific things
250 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100251 void __iomem *sbm_base; /* MAC's base address */
252 enum sbmac_state sbm_state; /* current state */
Ralf Baechle74b02472005-10-19 15:40:02 +0100253
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100254 void __iomem *sbm_macenable; /* MAC Enable Register */
255 void __iomem *sbm_maccfg; /* MAC Config Register */
256 void __iomem *sbm_fifocfg; /* FIFO Config Register */
257 void __iomem *sbm_framecfg; /* Frame Config Register */
258 void __iomem *sbm_rxfilter; /* Receive Filter Register */
259 void __iomem *sbm_isr; /* Interrupt Status Register */
260 void __iomem *sbm_imr; /* Interrupt Mask Register */
261 void __iomem *sbm_mdio; /* MDIO Register */
Ralf Baechle74b02472005-10-19 15:40:02 +0100262
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100263 enum sbmac_speed sbm_speed; /* current speed */
264 enum sbmac_duplex sbm_duplex; /* current duplex */
265 enum sbmac_fc sbm_fc; /* cur. flow control setting */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100266 int sbm_pause; /* current pause setting */
267 int sbm_link; /* current link state */
Ralf Baechle74b02472005-10-19 15:40:02 +0100268
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100269 unsigned char sbm_hwaddr[ETHER_ADDR_LEN];
Ralf Baechle74b02472005-10-19 15:40:02 +0100270
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100271 struct sbmacdma sbm_txdma; /* only channel 0 for now */
272 struct sbmacdma sbm_rxdma;
273 int rx_hw_checksum;
274 int sbe_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275};
276
277
278/**********************************************************************
279 * Externs
280 ********************************************************************* */
281
282/**********************************************************************
283 * Prototypes
284 ********************************************************************* */
285
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100286static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
287 int txrx, int maxdescr);
288static void sbdma_channel_start(struct sbmacdma *d, int rxtx);
Stephen Hemminger789585e2008-05-18 04:45:09 +0100289static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
290 struct sk_buff *m);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100291static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *m);
292static void sbdma_emptyring(struct sbmacdma *d);
Stephen Hemminger789585e2008-05-18 04:45:09 +0100293static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100294static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
295 int work_to_do, int poll);
296static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
297 int poll);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298static int sbmac_initctx(struct sbmac_softc *s);
299static void sbmac_channel_start(struct sbmac_softc *s);
300static void sbmac_channel_stop(struct sbmac_softc *s);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100301static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *,
302 enum sbmac_state);
303static void sbmac_promiscuous_mode(struct sbmac_softc *sc, int onoff);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304static uint64_t sbmac_addr2reg(unsigned char *ptr);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100305static irqreturn_t sbmac_intr(int irq, void *dev_instance);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev);
307static void sbmac_setmulti(struct sbmac_softc *sc);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100308static int sbmac_init(struct platform_device *pldev, long long base);
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100309static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed);
310static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
311 enum sbmac_fc fc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313static int sbmac_open(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314static void sbmac_tx_timeout (struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315static void sbmac_set_rx_mode(struct net_device *dev);
316static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
317static int sbmac_close(struct net_device *dev);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700318static int sbmac_poll(struct napi_struct *napi, int budget);
Mark Mason693aa942007-04-26 00:23:22 -0700319
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100320static void sbmac_mii_poll(struct net_device *dev);
Ralf Baechle59b81822005-10-20 12:01:28 +0100321static int sbmac_mii_probe(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100323static void sbmac_mii_sync(void __iomem *sbm_mdio);
324static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100325 int bitcnt);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100326static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx);
327static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
328 u16 val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330
331/**********************************************************************
332 * Globals
333 ********************************************************************* */
334
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100335static char sbmac_string[] = "sb1250-mac";
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100336
337static char sbmac_mdio_string[] = "sb1250-mac-mdio";
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338
339
340/**********************************************************************
341 * MDIO constants
342 ********************************************************************* */
343
344#define MII_COMMAND_START 0x01
345#define MII_COMMAND_READ 0x02
346#define MII_COMMAND_WRITE 0x01
347#define MII_COMMAND_ACK 0x02
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349#define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */
350
351#define ENABLE 1
352#define DISABLE 0
353
354/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100355 * SBMAC_MII_SYNC(sbm_mdio)
Ralf Baechle74b02472005-10-19 15:40:02 +0100356 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 * Synchronize with the MII - send a pattern of bits to the MII
358 * that will guarantee that it is ready to accept a command.
Ralf Baechle74b02472005-10-19 15:40:02 +0100359 *
360 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100361 * sbm_mdio - address of the MAC's MDIO register
Ralf Baechle74b02472005-10-19 15:40:02 +0100362 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 * Return value:
364 * nothing
365 ********************************************************************* */
366
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100367static void sbmac_mii_sync(void __iomem *sbm_mdio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
369 int cnt;
370 uint64_t bits;
371 int mac_mdio_genc;
372
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100373 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100374
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
Ralf Baechle74b02472005-10-19 15:40:02 +0100376
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100377 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 for (cnt = 0; cnt < 32; cnt++) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100380 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
381 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 }
383}
384
385/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100386 * SBMAC_MII_SENDDATA(sbm_mdio, data, bitcnt)
Ralf Baechle74b02472005-10-19 15:40:02 +0100387 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 * Send some bits to the MII. The bits to be sent are right-
389 * justified in the 'data' parameter.
Ralf Baechle74b02472005-10-19 15:40:02 +0100390 *
391 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100392 * sbm_mdio - address of the MAC's MDIO register
393 * data - data to send
394 * bitcnt - number of bits to send
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 ********************************************************************* */
396
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100397static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
398 int bitcnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399{
400 int i;
401 uint64_t bits;
402 unsigned int curmask;
403 int mac_mdio_genc;
404
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100405 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 bits = M_MAC_MDIO_DIR_OUTPUT;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100408 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 curmask = 1 << (bitcnt - 1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100411
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 for (i = 0; i < bitcnt; i++) {
413 if (data & curmask)
414 bits |= M_MAC_MDIO_OUT;
415 else bits &= ~M_MAC_MDIO_OUT;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100416 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
417 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
418 __raw_writeq(bits | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 curmask >>= 1;
420 }
421}
422
423
424
425/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100426 * SBMAC_MII_READ(bus, phyaddr, regidx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 * Read a PHY register.
Ralf Baechle74b02472005-10-19 15:40:02 +0100428 *
429 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100430 * bus - MDIO bus handle
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 * phyaddr - PHY's address
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100432 * regnum - index of register to read
Ralf Baechle74b02472005-10-19 15:40:02 +0100433 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 * Return value:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100435 * value read, or 0xffff if an error occurred.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 ********************************************************************* */
437
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100438static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100440 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
441 void __iomem *sbm_mdio = sc->sbm_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 int idx;
443 int error;
444 int regval;
445 int mac_mdio_genc;
446
447 /*
448 * Synchronize ourselves so that the PHY knows the next
449 * thing coming down is a command
450 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100451 sbmac_mii_sync(sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 /*
454 * Send the data to the PHY. The sequence is
455 * a "start" command (2 bits)
456 * a "read" command (2 bits)
457 * the PHY addr (5 bits)
458 * the register index (5 bits)
459 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100460 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
461 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_READ, 2);
462 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
463 sbmac_mii_senddata(sbm_mdio, regidx, 5);
Ralf Baechle74b02472005-10-19 15:40:02 +0100464
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100465 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Ralf Baechle74b02472005-10-19 15:40:02 +0100466
467 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 * Switch the port around without a clock transition.
469 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100470 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100471
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 /*
473 * Send out a clock pulse to signal we want the status
474 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100475 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
476 sbm_mdio);
477 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100478
479 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 * If an error occurred, the PHY will signal '1' back
481 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100482 error = __raw_readq(sbm_mdio) & M_MAC_MDIO_IN;
Ralf Baechle74b02472005-10-19 15:40:02 +0100483
484 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 * Issue an 'idle' clock pulse, but keep the direction
486 * the same.
487 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100488 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
489 sbm_mdio);
490 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 regval = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +0100493
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 for (idx = 0; idx < 16; idx++) {
495 regval <<= 1;
Ralf Baechle74b02472005-10-19 15:40:02 +0100496
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 if (error == 0) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100498 if (__raw_readq(sbm_mdio) & M_MAC_MDIO_IN)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 regval |= 1;
500 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100501
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100502 __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
503 sbm_mdio);
504 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100506
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 /* Switch back to output */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100508 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if (error == 0)
511 return regval;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100512 return 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513}
514
515
516/**********************************************************************
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100517 * SBMAC_MII_WRITE(bus, phyaddr, regidx, regval)
Ralf Baechle74b02472005-10-19 15:40:02 +0100518 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 * Write a value to a PHY register.
Ralf Baechle74b02472005-10-19 15:40:02 +0100520 *
521 * Input parameters:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100522 * bus - MDIO bus handle
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 * phyaddr - PHY to use
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100524 * regidx - register within the PHY
525 * regval - data to write to register
Ralf Baechle74b02472005-10-19 15:40:02 +0100526 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 * Return value:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100528 * 0 for success
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 ********************************************************************* */
530
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100531static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
532 u16 regval)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100534 struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
535 void __iomem *sbm_mdio = sc->sbm_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 int mac_mdio_genc;
537
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100538 sbmac_mii_sync(sbm_mdio);
Ralf Baechle74b02472005-10-19 15:40:02 +0100539
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100540 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
541 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_WRITE, 2);
542 sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
543 sbmac_mii_senddata(sbm_mdio, regidx, 5);
544 sbmac_mii_senddata(sbm_mdio, MII_COMMAND_ACK, 2);
545 sbmac_mii_senddata(sbm_mdio, regval, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100547 mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100549 __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
550
551 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552}
553
554
555
556/**********************************************************************
557 * SBDMA_INITCTX(d,s,chan,txrx,maxdescr)
Ralf Baechle74b02472005-10-19 15:40:02 +0100558 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 * Initialize a DMA channel context. Since there are potentially
560 * eight DMA channels per MAC, it's nice to do this in a standard
Ralf Baechle74b02472005-10-19 15:40:02 +0100561 * way.
562 *
563 * Input parameters:
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100564 * d - struct sbmacdma (DMA channel context)
565 * s - struct sbmac_softc (pointer to a MAC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 * chan - channel number (0..1 right now)
567 * txrx - Identifies DMA_TX or DMA_RX for channel direction
568 * maxdescr - number of descriptors
Ralf Baechle74b02472005-10-19 15:40:02 +0100569 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 * Return value:
571 * nothing
572 ********************************************************************* */
573
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100574static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
575 int txrx, int maxdescr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576{
Mark Mason693aa942007-04-26 00:23:22 -0700577#ifdef CONFIG_SBMAC_COALESCE
578 int int_pktcnt, int_timeout;
579#endif
580
Ralf Baechle74b02472005-10-19 15:40:02 +0100581 /*
582 * Save away interesting stuff in the structure
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 d->sbdma_eth = s;
586 d->sbdma_channel = chan;
587 d->sbdma_txdir = txrx;
Ralf Baechle74b02472005-10-19 15:40:02 +0100588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589#if 0
590 /* RMON clearing */
591 s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
592#endif
593
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100594 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BYTES);
595 __raw_writeq(0, s->sbm_base + R_MAC_RMON_COLLISIONS);
596 __raw_writeq(0, s->sbm_base + R_MAC_RMON_LATE_COL);
597 __raw_writeq(0, s->sbm_base + R_MAC_RMON_EX_COL);
598 __raw_writeq(0, s->sbm_base + R_MAC_RMON_FCS_ERROR);
599 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_ABORT);
600 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BAD);
601 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_GOOD);
602 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_RUNT);
603 __raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_OVERSIZE);
604 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BYTES);
605 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_MCAST);
606 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BCAST);
607 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BAD);
608 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_GOOD);
609 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_RUNT);
610 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_OVERSIZE);
611 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_FCS_ERROR);
612 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_LENGTH_ERROR);
613 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_CODE_ERROR);
614 __raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_ALIGN_ERROR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Ralf Baechle74b02472005-10-19 15:40:02 +0100616 /*
617 * initialize register pointers
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100619
620 d->sbdma_config0 =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0);
Ralf Baechle74b02472005-10-19 15:40:02 +0100622 d->sbdma_config1 =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100624 d->sbdma_dscrbase =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE);
Ralf Baechle74b02472005-10-19 15:40:02 +0100626 d->sbdma_dscrcnt =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT);
Ralf Baechle74b02472005-10-19 15:40:02 +0100628 d->sbdma_curdscr =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR);
Mark Mason693aa942007-04-26 00:23:22 -0700630 if (d->sbdma_txdir)
631 d->sbdma_oodpktlost = NULL;
632 else
633 d->sbdma_oodpktlost =
634 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX);
Ralf Baechle74b02472005-10-19 15:40:02 +0100635
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 /*
637 * Allocate memory for the ring
638 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100639
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 d->sbdma_maxdescr = maxdescr;
Ralf Baechle74b02472005-10-19 15:40:02 +0100641
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100642 d->sbdma_dscrtable_unaligned = kcalloc(d->sbdma_maxdescr + 1,
643 sizeof(*d->sbdma_dscrtable),
644 GFP_KERNEL);
Ralf Baechle04115de2005-10-10 14:50:36 +0100645
646 /*
647 * The descriptor table must be aligned to at least 16 bytes or the
648 * MAC will corrupt it.
649 */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100650 d->sbdma_dscrtable = (struct sbdmadscr *)
651 ALIGN((unsigned long)d->sbdma_dscrtable_unaligned,
652 sizeof(*d->sbdma_dscrtable));
Ralf Baechle74b02472005-10-19 15:40:02 +0100653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
Ralf Baechle74b02472005-10-19 15:40:02 +0100655
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable);
Ralf Baechle74b02472005-10-19 15:40:02 +0100657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 /*
659 * And context table
660 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100661
Mariusz Kozlowskic477f332007-07-31 23:58:36 +0200662 d->sbdma_ctxtable = kcalloc(d->sbdma_maxdescr,
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100663 sizeof(*d->sbdma_ctxtable), GFP_KERNEL);
Ralf Baechle74b02472005-10-19 15:40:02 +0100664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665#ifdef CONFIG_SBMAC_COALESCE
666 /*
667 * Setup Rx/Tx DMA coalescing defaults
668 */
669
Mark Mason693aa942007-04-26 00:23:22 -0700670 int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 if ( int_pktcnt ) {
672 d->sbdma_int_pktcnt = int_pktcnt;
673 } else {
674 d->sbdma_int_pktcnt = 1;
675 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100676
Mark Mason693aa942007-04-26 00:23:22 -0700677 int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if ( int_timeout ) {
679 d->sbdma_int_timeout = int_timeout;
680 } else {
681 d->sbdma_int_timeout = 0;
682 }
683#endif
684
685}
686
687/**********************************************************************
688 * SBDMA_CHANNEL_START(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100689 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 * Initialize the hardware registers for a DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +0100691 *
692 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 * d - DMA channel to init (context must be previously init'd
694 * rxtx - DMA_RX or DMA_TX depending on what type of channel
Ralf Baechle74b02472005-10-19 15:40:02 +0100695 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 * Return value:
697 * nothing
698 ********************************************************************* */
699
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100700static void sbdma_channel_start(struct sbmacdma *d, int rxtx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701{
702 /*
703 * Turn on the DMA channel
704 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706#ifdef CONFIG_SBMAC_COALESCE
Ralf Baechle20399732005-10-19 15:39:05 +0100707 __raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
708 0, d->sbdma_config1);
709 __raw_writeq(M_DMA_EOP_INT_EN |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 V_DMA_RINGSZ(d->sbdma_maxdescr) |
711 V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
Ralf Baechle20399732005-10-19 15:39:05 +0100712 0, d->sbdma_config0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713#else
Ralf Baechle20399732005-10-19 15:39:05 +0100714 __raw_writeq(0, d->sbdma_config1);
715 __raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) |
716 0, d->sbdma_config0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717#endif
718
Ralf Baechle20399732005-10-19 15:39:05 +0100719 __raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
721 /*
722 * Initialize ring pointers
723 */
724
725 d->sbdma_addptr = d->sbdma_dscrtable;
726 d->sbdma_remptr = d->sbdma_dscrtable;
727}
728
729/**********************************************************************
730 * SBDMA_CHANNEL_STOP(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100731 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 * Initialize the hardware registers for a DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +0100733 *
734 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 * d - DMA channel to init (context must be previously init'd
Ralf Baechle74b02472005-10-19 15:40:02 +0100736 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 * Return value:
738 * nothing
739 ********************************************************************* */
740
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100741static void sbdma_channel_stop(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
743 /*
744 * Turn off the DMA channel
745 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100746
Ralf Baechle20399732005-10-19 15:39:05 +0100747 __raw_writeq(0, d->sbdma_config1);
Ralf Baechle74b02472005-10-19 15:40:02 +0100748
Ralf Baechle20399732005-10-19 15:39:05 +0100749 __raw_writeq(0, d->sbdma_dscrbase);
Ralf Baechle74b02472005-10-19 15:40:02 +0100750
Ralf Baechle20399732005-10-19 15:39:05 +0100751 __raw_writeq(0, d->sbdma_config0);
Ralf Baechle74b02472005-10-19 15:40:02 +0100752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 /*
754 * Zero ring pointers
755 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100756
Ralf Baechle20399732005-10-19 15:39:05 +0100757 d->sbdma_addptr = NULL;
758 d->sbdma_remptr = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759}
760
Stephen Hemminger789585e2008-05-18 04:45:09 +0100761static inline void sbdma_align_skb(struct sk_buff *skb,
762 unsigned int power2, unsigned int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763{
Stephen Hemminger789585e2008-05-18 04:45:09 +0100764 unsigned char *addr = skb->data;
765 unsigned char *newaddr = PTR_ALIGN(addr, power2);
Ralf Baechle74b02472005-10-19 15:40:02 +0100766
Stephen Hemminger789585e2008-05-18 04:45:09 +0100767 skb_reserve(skb, newaddr - addr + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768}
769
770
771/**********************************************************************
772 * SBDMA_ADD_RCVBUFFER(d,sb)
Ralf Baechle74b02472005-10-19 15:40:02 +0100773 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 * Add a buffer to the specified DMA channel. For receive channels,
775 * this queues a buffer for inbound packets.
Ralf Baechle74b02472005-10-19 15:40:02 +0100776 *
777 * Input parameters:
Stephen Hemminger789585e2008-05-18 04:45:09 +0100778 * sc - softc structure
779 * d - DMA channel descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 * sb - sk_buff to add, or NULL if we should allocate one
Ralf Baechle74b02472005-10-19 15:40:02 +0100781 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 * Return value:
783 * 0 if buffer could not be added (ring is full)
784 * 1 if buffer added successfully
785 ********************************************************************* */
786
787
Stephen Hemminger789585e2008-05-18 04:45:09 +0100788static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
789 struct sk_buff *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790{
Stephen Hemminger789585e2008-05-18 04:45:09 +0100791 struct net_device *dev = sc->sbm_dev;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100792 struct sbdmadscr *dsc;
793 struct sbdmadscr *nextdsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 struct sk_buff *sb_new = NULL;
795 int pktsize = ENET_PACKET_SIZE;
Ralf Baechle74b02472005-10-19 15:40:02 +0100796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 /* get pointer to our current place in the ring */
Ralf Baechle74b02472005-10-19 15:40:02 +0100798
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 dsc = d->sbdma_addptr;
800 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
Ralf Baechle74b02472005-10-19 15:40:02 +0100801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 /*
803 * figure out if the ring is full - if the next descriptor
804 * is the same as the one that we're going to remove from
805 * the ring, the ring is full
806 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 if (nextdsc == d->sbdma_remptr) {
809 return -ENOSPC;
810 }
811
Ralf Baechle74b02472005-10-19 15:40:02 +0100812 /*
813 * Allocate a sk_buff if we don't already have one.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 * If we do have an sk_buff, reset it so that it's empty.
815 *
816 * Note: sk_buffs don't seem to be guaranteed to have any sort
817 * of alignment when they are allocated. Therefore, allocate enough
818 * extra space to make sure that:
819 *
820 * 1. the data does not start in the middle of a cache line.
821 * 2. The data does not end in the middle of a cache line
Ralf Baechle74b02472005-10-19 15:40:02 +0100822 * 3. The buffer can be aligned such that the IP addresses are
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 * naturally aligned.
824 *
825 * Remember, the SOCs MAC writes whole cache lines at a time,
826 * without reading the old contents first. So, if the sk_buff's
827 * data portion starts in the middle of a cache line, the SOC
828 * DMA will trash the beginning (and ending) portions.
829 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 if (sb == NULL) {
Stephen Hemminger789585e2008-05-18 04:45:09 +0100832 sb_new = netdev_alloc_skb(dev, ENET_PACKET_SIZE +
833 SMP_CACHE_BYTES * 2 +
834 NET_IP_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 if (sb_new == NULL) {
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +0100836 pr_info("%s: sk_buff allocation failed\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 d->sbdma_eth->sbm_dev->name);
838 return -ENOBUFS;
839 }
840
Stephen Hemminger789585e2008-05-18 04:45:09 +0100841 sbdma_align_skb(sb_new, SMP_CACHE_BYTES, NET_IP_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 }
843 else {
844 sb_new = sb;
Ralf Baechle74b02472005-10-19 15:40:02 +0100845 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 * nothing special to reinit buffer, it's already aligned
847 * and sb->data already points to a good place.
848 */
849 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100852 * fill in the descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100854
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855#ifdef CONFIG_SBMAC_COALESCE
856 /*
857 * Do not interrupt per DMA transfer.
858 */
David S. Miller689be432005-06-28 15:25:31 -0700859 dsc->dscr_a = virt_to_phys(sb_new->data) |
Stephen Hemminger789585e2008-05-18 04:45:09 +0100860 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#else
David S. Miller689be432005-06-28 15:25:31 -0700862 dsc->dscr_a = virt_to_phys(sb_new->data) |
Stephen Hemminger789585e2008-05-18 04:45:09 +0100863 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 M_DMA_DSCRA_INTERRUPT;
865#endif
866
867 /* receiving: no options */
868 dsc->dscr_b = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +0100869
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100871 * fill in the context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100873
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new;
Ralf Baechle74b02472005-10-19 15:40:02 +0100875
876 /*
877 * point at next packet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 d->sbdma_addptr = nextdsc;
Ralf Baechle74b02472005-10-19 15:40:02 +0100881
882 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 * Give the buffer to the DMA engine.
884 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100885
Ralf Baechle20399732005-10-19 15:39:05 +0100886 __raw_writeq(1, d->sbdma_dscrcnt);
Ralf Baechle74b02472005-10-19 15:40:02 +0100887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 return 0; /* we did it */
889}
890
891/**********************************************************************
892 * SBDMA_ADD_TXBUFFER(d,sb)
Ralf Baechle74b02472005-10-19 15:40:02 +0100893 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 * Add a transmit buffer to the specified DMA channel, causing a
895 * transmit to start.
Ralf Baechle74b02472005-10-19 15:40:02 +0100896 *
897 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 * d - DMA channel descriptor
899 * sb - sk_buff to add
Ralf Baechle74b02472005-10-19 15:40:02 +0100900 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 * Return value:
902 * 0 transmit queued successfully
903 * otherwise error code
904 ********************************************************************* */
905
906
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100907static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908{
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100909 struct sbdmadscr *dsc;
910 struct sbdmadscr *nextdsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 uint64_t phys;
912 uint64_t ncb;
913 int length;
Ralf Baechle74b02472005-10-19 15:40:02 +0100914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 /* get pointer to our current place in the ring */
Ralf Baechle74b02472005-10-19 15:40:02 +0100916
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 dsc = d->sbdma_addptr;
918 nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
Ralf Baechle74b02472005-10-19 15:40:02 +0100919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 /*
921 * figure out if the ring is full - if the next descriptor
922 * is the same as the one that we're going to remove from
923 * the ring, the ring is full
924 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 if (nextdsc == d->sbdma_remptr) {
927 return -ENOSPC;
928 }
Ralf Baechle74b02472005-10-19 15:40:02 +0100929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 /*
931 * Under Linux, it's not necessary to copy/coalesce buffers
932 * like it is on NetBSD. We think they're all contiguous,
933 * but that may not be true for GBE.
934 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100935
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 length = sb->len;
Ralf Baechle74b02472005-10-19 15:40:02 +0100937
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 /*
939 * fill in the descriptor. Note that the number of cache
940 * blocks in the descriptor is the number of blocks
941 * *spanned*, so we need to add in the offset (if any)
942 * while doing the calculation.
943 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100944
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 phys = virt_to_phys(sb->data);
946 ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1)));
947
Ralf Baechle74b02472005-10-19 15:40:02 +0100948 dsc->dscr_a = phys |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 V_DMA_DSCRA_A_SIZE(ncb) |
950#ifndef CONFIG_SBMAC_COALESCE
951 M_DMA_DSCRA_INTERRUPT |
952#endif
953 M_DMA_ETHTX_SOP;
Ralf Baechle74b02472005-10-19 15:40:02 +0100954
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 /* transmitting: set outbound options and length */
956
957 dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) |
958 V_DMA_DSCRB_PKT_SIZE(length);
Ralf Baechle74b02472005-10-19 15:40:02 +0100959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960 /*
Ralf Baechle74b02472005-10-19 15:40:02 +0100961 * fill in the context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100963
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb;
Ralf Baechle74b02472005-10-19 15:40:02 +0100965
966 /*
967 * point at next packet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100969
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 d->sbdma_addptr = nextdsc;
Ralf Baechle74b02472005-10-19 15:40:02 +0100971
972 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 * Give the buffer to the DMA engine.
974 */
Ralf Baechle74b02472005-10-19 15:40:02 +0100975
Ralf Baechle20399732005-10-19 15:39:05 +0100976 __raw_writeq(1, d->sbdma_dscrcnt);
Ralf Baechle74b02472005-10-19 15:40:02 +0100977
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 return 0; /* we did it */
979}
980
981
982
983
984/**********************************************************************
985 * SBDMA_EMPTYRING(d)
Ralf Baechle74b02472005-10-19 15:40:02 +0100986 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 * Free all allocated sk_buffs on the specified DMA channel;
Ralf Baechle74b02472005-10-19 15:40:02 +0100988 *
989 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 * d - DMA channel
Ralf Baechle74b02472005-10-19 15:40:02 +0100991 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 * Return value:
993 * nothing
994 ********************************************************************* */
995
Maciej W. Rozycki73d73962007-09-20 19:14:01 +0100996static void sbdma_emptyring(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997{
998 int idx;
999 struct sk_buff *sb;
Ralf Baechle74b02472005-10-19 15:40:02 +01001000
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 for (idx = 0; idx < d->sbdma_maxdescr; idx++) {
1002 sb = d->sbdma_ctxtable[idx];
1003 if (sb) {
1004 dev_kfree_skb(sb);
1005 d->sbdma_ctxtable[idx] = NULL;
1006 }
1007 }
1008}
1009
1010
1011/**********************************************************************
1012 * SBDMA_FILLRING(d)
Ralf Baechle74b02472005-10-19 15:40:02 +01001013 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 * Fill the specified DMA channel (must be receive channel)
1015 * with sk_buffs
Ralf Baechle74b02472005-10-19 15:40:02 +01001016 *
1017 * Input parameters:
Stephen Hemminger789585e2008-05-18 04:45:09 +01001018 * sc - softc structure
1019 * d - DMA channel
Ralf Baechle74b02472005-10-19 15:40:02 +01001020 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 * Return value:
1022 * nothing
1023 ********************************************************************* */
1024
Stephen Hemminger789585e2008-05-18 04:45:09 +01001025static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026{
1027 int idx;
Ralf Baechle74b02472005-10-19 15:40:02 +01001028
Stephen Hemminger789585e2008-05-18 04:45:09 +01001029 for (idx = 0; idx < SBMAC_MAX_RXDESCR - 1; idx++) {
1030 if (sbdma_add_rcvbuffer(sc, d, NULL) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 break;
1032 }
1033}
1034
Deepak Saxenad6830012007-03-19 15:43:11 -07001035#ifdef CONFIG_NET_POLL_CONTROLLER
1036static void sbmac_netpoll(struct net_device *netdev)
1037{
1038 struct sbmac_softc *sc = netdev_priv(netdev);
1039 int irq = sc->sbm_dev->irq;
1040
1041 __raw_writeq(0, sc->sbm_imr);
1042
Yoann Padioleau0da2f0f2007-07-06 02:39:56 -07001043 sbmac_intr(irq, netdev);
Deepak Saxenad6830012007-03-19 15:43:11 -07001044
1045#ifdef CONFIG_SBMAC_COALESCE
1046 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1047 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
1048 sc->sbm_imr);
1049#else
Jeff Garzik7d2e3cb2008-05-13 01:41:58 -04001050 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
Deepak Saxenad6830012007-03-19 15:43:11 -07001051 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
1052#endif
1053}
1054#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
1056/**********************************************************************
Mark Mason693aa942007-04-26 00:23:22 -07001057 * SBDMA_RX_PROCESS(sc,d,work_to_do,poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001059 * Process "completed" receive buffers on the specified DMA channel.
Ralf Baechle74b02472005-10-19 15:40:02 +01001060 *
1061 * Input parameters:
Mark Mason693aa942007-04-26 00:23:22 -07001062 * sc - softc structure
1063 * d - DMA channel context
1064 * work_to_do - no. of packets to process before enabling interrupt
1065 * again (for NAPI)
1066 * poll - 1: using polling (for NAPI)
Ralf Baechle74b02472005-10-19 15:40:02 +01001067 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 * Return value:
1069 * nothing
1070 ********************************************************************* */
1071
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001072static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1073 int work_to_do, int poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074{
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001075 struct net_device *dev = sc->sbm_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 int curidx;
1077 int hwidx;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001078 struct sbdmadscr *dsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 struct sk_buff *sb;
1080 int len;
Mark Mason693aa942007-04-26 00:23:22 -07001081 int work_done = 0;
1082 int dropped = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001083
Mark Mason693aa942007-04-26 00:23:22 -07001084 prefetch(d);
1085
1086again:
1087 /* Check if the HW dropped any frames */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001088 dev->stats.rx_fifo_errors
Mark Mason693aa942007-04-26 00:23:22 -07001089 += __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff;
1090 __raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost);
1091
1092 while (work_to_do-- > 0) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001093 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 * figure out where we are (as an index) and where
1095 * the hardware is (also as an index)
1096 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001097 * This could be done faster if (for example) the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 * descriptor table was page-aligned and contiguous in
1099 * both virtual and physical memory -- you could then
1100 * just compare the low-order bits of the virtual address
1101 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1102 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001103
Mark Mason693aa942007-04-26 00:23:22 -07001104 dsc = d->sbdma_remptr;
1105 curidx = dsc - d->sbdma_dscrtable;
1106
1107 prefetch(dsc);
1108 prefetch(&d->sbdma_ctxtable[curidx]);
1109
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001110 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1111 d->sbdma_dscrtable_phys) /
1112 sizeof(*d->sbdma_dscrtable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 /*
1115 * If they're the same, that means we've processed all
1116 * of the descriptors up to (but not including) the one that
1117 * the hardware is working on right now.
1118 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001119
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 if (curidx == hwidx)
Mark Mason693aa942007-04-26 00:23:22 -07001121 goto done;
Ralf Baechle74b02472005-10-19 15:40:02 +01001122
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 /*
1124 * Otherwise, get the packet's sk_buff ptr back
1125 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 sb = d->sbdma_ctxtable[curidx];
1128 d->sbdma_ctxtable[curidx] = NULL;
Ralf Baechle74b02472005-10-19 15:40:02 +01001129
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4;
Ralf Baechle74b02472005-10-19 15:40:02 +01001131
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132 /*
1133 * Check packet status. If good, process it.
1134 * If not, silently drop it and put it back on the
1135 * receive ring.
1136 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001137
Mark Mason693aa942007-04-26 00:23:22 -07001138 if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 /*
1141 * Add a new buffer to replace the old one. If we fail
1142 * to allocate a buffer, we're going to drop this
1143 * packet and put it right back on the receive ring.
1144 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001145
Stephen Hemminger789585e2008-05-18 04:45:09 +01001146 if (unlikely(sbdma_add_rcvbuffer(sc, d, NULL) ==
1147 -ENOBUFS)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001148 dev->stats.rx_dropped++;
Stephen Hemminger789585e2008-05-18 04:45:09 +01001149 /* Re-add old buffer */
1150 sbdma_add_rcvbuffer(sc, d, sb);
Mark Mason693aa942007-04-26 00:23:22 -07001151 /* No point in continuing at the moment */
1152 printk(KERN_ERR "dropped packet (1)\n");
1153 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1154 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155 } else {
1156 /*
1157 * Set length into the packet
1158 */
1159 skb_put(sb,len);
Ralf Baechle74b02472005-10-19 15:40:02 +01001160
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161 /*
1162 * Buffer has been replaced on the
1163 * receive ring. Pass the buffer to
1164 * the kernel
1165 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001166 sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
1167 /* Check hw IPv4/TCP checksum if supported */
1168 if (sc->rx_hw_checksum == ENABLE) {
1169 if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) &&
1170 !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) {
1171 sb->ip_summed = CHECKSUM_UNNECESSARY;
1172 /* don't need to set sb->csum */
1173 } else {
Eric Dumazetbc8acf22010-09-02 13:07:41 -07001174 skb_checksum_none_assert(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001175 }
1176 }
Mark Mason693aa942007-04-26 00:23:22 -07001177 prefetch(sb->data);
1178 prefetch((const void *)(((char *)sb->data)+32));
1179 if (poll)
1180 dropped = netif_receive_skb(sb);
1181 else
1182 dropped = netif_rx(sb);
Ralf Baechle74b02472005-10-19 15:40:02 +01001183
Mark Mason693aa942007-04-26 00:23:22 -07001184 if (dropped == NET_RX_DROP) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001185 dev->stats.rx_dropped++;
Mark Mason693aa942007-04-26 00:23:22 -07001186 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1187 goto done;
1188 }
1189 else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001190 dev->stats.rx_bytes += len;
1191 dev->stats.rx_packets++;
Mark Mason693aa942007-04-26 00:23:22 -07001192 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193 }
1194 } else {
1195 /*
1196 * Packet was mangled somehow. Just drop it and
1197 * put it back on the receive ring.
1198 */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001199 dev->stats.rx_errors++;
Stephen Hemminger789585e2008-05-18 04:45:09 +01001200 sbdma_add_rcvbuffer(sc, d, sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001202
1203
1204 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 * .. and advance to the next buffer.
1206 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001207
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
Mark Mason693aa942007-04-26 00:23:22 -07001209 work_done++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 }
Mark Mason693aa942007-04-26 00:23:22 -07001211 if (!poll) {
1212 work_to_do = 32;
1213 goto again; /* collect fifo drop statistics again */
1214 }
1215done:
1216 return work_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217}
1218
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219/**********************************************************************
1220 * SBDMA_TX_PROCESS(sc,d)
Ralf Baechle74b02472005-10-19 15:40:02 +01001221 *
1222 * Process "completed" transmit buffers on the specified DMA channel.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 * This is normally called within the interrupt service routine.
1224 * Note that this isn't really ideal for priority channels, since
Ralf Baechle74b02472005-10-19 15:40:02 +01001225 * it processes all of the packets on a given channel before
1226 * returning.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001228 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229 * sc - softc structure
Mark Mason693aa942007-04-26 00:23:22 -07001230 * d - DMA channel context
1231 * poll - 1: using polling (for NAPI)
Ralf Baechle74b02472005-10-19 15:40:02 +01001232 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 * Return value:
1234 * nothing
1235 ********************************************************************* */
1236
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001237static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
1238 int poll)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239{
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001240 struct net_device *dev = sc->sbm_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241 int curidx;
1242 int hwidx;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001243 struct sbdmadscr *dsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 struct sk_buff *sb;
1245 unsigned long flags;
Mark Mason693aa942007-04-26 00:23:22 -07001246 int packets_handled = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
1248 spin_lock_irqsave(&(sc->sbm_lock), flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01001249
Mark Mason693aa942007-04-26 00:23:22 -07001250 if (d->sbdma_remptr == d->sbdma_addptr)
1251 goto end_unlock;
1252
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001253 hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1254 d->sbdma_dscrtable_phys) / sizeof(*d->sbdma_dscrtable);
Mark Mason693aa942007-04-26 00:23:22 -07001255
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256 for (;;) {
Ralf Baechle74b02472005-10-19 15:40:02 +01001257 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 * figure out where we are (as an index) and where
1259 * the hardware is (also as an index)
1260 *
Ralf Baechle74b02472005-10-19 15:40:02 +01001261 * This could be done faster if (for example) the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 * descriptor table was page-aligned and contiguous in
1263 * both virtual and physical memory -- you could then
1264 * just compare the low-order bits of the virtual address
1265 * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1266 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001267
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 curidx = d->sbdma_remptr - d->sbdma_dscrtable;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270 /*
1271 * If they're the same, that means we've processed all
1272 * of the descriptors up to (but not including) the one that
1273 * the hardware is working on right now.
1274 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001275
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 if (curidx == hwidx)
1277 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 /*
1280 * Otherwise, get the packet's sk_buff ptr back
1281 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001282
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 dsc = &(d->sbdma_dscrtable[curidx]);
1284 sb = d->sbdma_ctxtable[curidx];
1285 d->sbdma_ctxtable[curidx] = NULL;
Ralf Baechle74b02472005-10-19 15:40:02 +01001286
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 /*
1288 * Stats
1289 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001290
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001291 dev->stats.tx_bytes += sb->len;
1292 dev->stats.tx_packets++;
Ralf Baechle74b02472005-10-19 15:40:02 +01001293
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294 /*
1295 * for transmits, we just free buffers.
1296 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001297
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 dev_kfree_skb_irq(sb);
Ralf Baechle74b02472005-10-19 15:40:02 +01001299
1300 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 * .. and advance to the next buffer.
1302 */
1303
1304 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001305
Mark Mason693aa942007-04-26 00:23:22 -07001306 packets_handled++;
1307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001309
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 /*
1311 * Decide if we should wake up the protocol or not.
1312 * Other drivers seem to do this when we reach a low
1313 * watermark on the transmit queue.
1314 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001315
Mark Mason693aa942007-04-26 00:23:22 -07001316 if (packets_handled)
1317 netif_wake_queue(d->sbdma_eth->sbm_dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01001318
Mark Mason693aa942007-04-26 00:23:22 -07001319end_unlock:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 spin_unlock_irqrestore(&(sc->sbm_lock), flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01001321
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322}
1323
1324
1325
1326/**********************************************************************
1327 * SBMAC_INITCTX(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001328 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 * Initialize an Ethernet context structure - this is called
1330 * once per MAC on the 1250. Memory is allocated here, so don't
1331 * call it again from inside the ioctl routines that bring the
1332 * interface up/down
Ralf Baechle74b02472005-10-19 15:40:02 +01001333 *
1334 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 * s - sbmac context structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001336 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 * Return value:
1338 * 0
1339 ********************************************************************* */
1340
1341static int sbmac_initctx(struct sbmac_softc *s)
1342{
Ralf Baechle74b02472005-10-19 15:40:02 +01001343
1344 /*
1345 * figure out the addresses of some ports
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001347
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348 s->sbm_macenable = s->sbm_base + R_MAC_ENABLE;
1349 s->sbm_maccfg = s->sbm_base + R_MAC_CFG;
1350 s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG;
1351 s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG;
1352 s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG;
1353 s->sbm_isr = s->sbm_base + R_MAC_STATUS;
1354 s->sbm_imr = s->sbm_base + R_MAC_INT_MASK;
1355 s->sbm_mdio = s->sbm_base + R_MAC_MDIO;
1356
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357 /*
1358 * Initialize the DMA channels. Right now, only one per MAC is used
1359 * Note: Only do this _once_, as it allocates memory from the kernel!
1360 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR);
1363 sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR);
Ralf Baechle74b02472005-10-19 15:40:02 +01001364
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 /*
1366 * initial state is OFF
1367 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001368
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 s->sbm_state = sbmac_state_off;
Ralf Baechle74b02472005-10-19 15:40:02 +01001370
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 return 0;
1372}
1373
1374
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001375static void sbdma_uninitctx(struct sbmacdma *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376{
Mark Mason693aa942007-04-26 00:23:22 -07001377 if (d->sbdma_dscrtable_unaligned) {
1378 kfree(d->sbdma_dscrtable_unaligned);
1379 d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001381
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 if (d->sbdma_ctxtable) {
1383 kfree(d->sbdma_ctxtable);
1384 d->sbdma_ctxtable = NULL;
1385 }
1386}
1387
1388
1389static void sbmac_uninitctx(struct sbmac_softc *sc)
1390{
1391 sbdma_uninitctx(&(sc->sbm_txdma));
1392 sbdma_uninitctx(&(sc->sbm_rxdma));
1393}
1394
1395
1396/**********************************************************************
1397 * SBMAC_CHANNEL_START(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001398 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 * Start packet processing on this MAC.
Ralf Baechle74b02472005-10-19 15:40:02 +01001400 *
1401 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 * s - sbmac structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001403 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 * Return value:
1405 * nothing
1406 ********************************************************************* */
1407
1408static void sbmac_channel_start(struct sbmac_softc *s)
1409{
1410 uint64_t reg;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001411 void __iomem *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 uint64_t cfg,fifo,framecfg;
1413 int idx, th_value;
Ralf Baechle74b02472005-10-19 15:40:02 +01001414
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 /*
1416 * Don't do this if running
1417 */
1418
1419 if (s->sbm_state == sbmac_state_on)
1420 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001421
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422 /*
1423 * Bring the controller out of reset, but leave it off.
1424 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001425
Ralf Baechle20399732005-10-19 15:39:05 +01001426 __raw_writeq(0, s->sbm_macenable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001427
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428 /*
1429 * Ignore all received packets
1430 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001431
Ralf Baechle20399732005-10-19 15:39:05 +01001432 __raw_writeq(0, s->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001433
1434 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 * Calculate values for various control registers.
1436 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001437
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 cfg = M_MAC_RETRY_EN |
Ralf Baechle74b02472005-10-19 15:40:02 +01001439 M_MAC_TX_HOLD_SOP_EN |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 V_MAC_TX_PAUSE_CNT_16K |
1441 M_MAC_AP_STAT_EN |
1442 M_MAC_FAST_SYNC |
1443 M_MAC_SS_EN |
1444 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001445
1446 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars
1448 * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above
1449 * Use a larger RD_THRSH for gigabit
1450 */
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001451 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 th_value = 28;
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001453 else
1454 th_value = 64;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455
1456 fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */
1457 ((s->sbm_speed == sbmac_speed_1000)
1458 ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) |
1459 V_MAC_TX_RL_THRSH(4) |
1460 V_MAC_RX_PL_THRSH(4) |
1461 V_MAC_RX_RD_THRSH(4) | /* Must be '4' */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 V_MAC_RX_RL_THRSH(8) |
1463 0;
1464
1465 framecfg = V_MAC_MIN_FRAMESZ_DEFAULT |
1466 V_MAC_MAX_FRAMESZ_DEFAULT |
1467 V_MAC_BACKOFF_SEL(1);
1468
1469 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001470 * Clear out the hash address map
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001472
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473 port = s->sbm_base + R_MAC_HASH_BASE;
1474 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001475 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 port += sizeof(uint64_t);
1477 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001478
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479 /*
1480 * Clear out the exact-match table
1481 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001482
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 port = s->sbm_base + R_MAC_ADDR_BASE;
1484 for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001485 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 port += sizeof(uint64_t);
1487 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001488
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489 /*
1490 * Clear out the DMA Channel mapping table registers
1491 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001492
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 port = s->sbm_base + R_MAC_CHUP0_BASE;
1494 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001495 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496 port += sizeof(uint64_t);
1497 }
1498
1499
1500 port = s->sbm_base + R_MAC_CHLO0_BASE;
1501 for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
Ralf Baechle20399732005-10-19 15:39:05 +01001502 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001503 port += sizeof(uint64_t);
1504 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001505
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 /*
1507 * Program the hardware address. It goes into the hardware-address
1508 * register as well as the first filter register.
1509 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001510
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 reg = sbmac_addr2reg(s->sbm_hwaddr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001512
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 port = s->sbm_base + R_MAC_ADDR_BASE;
Ralf Baechle20399732005-10-19 15:39:05 +01001514 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 port = s->sbm_base + R_MAC_ETHERNET_ADDR;
1516
1517#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
1518 /*
1519 * Pass1 SOCs do not receive packets addressed to the
1520 * destination address in the R_MAC_ETHERNET_ADDR register.
1521 * Set the value to zero.
1522 */
Ralf Baechle20399732005-10-19 15:39:05 +01001523 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524#else
Ralf Baechle20399732005-10-19 15:39:05 +01001525 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526#endif
Ralf Baechle74b02472005-10-19 15:40:02 +01001527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 /*
1529 * Set the receive filter for no packets, and write values
1530 * to the various config registers
1531 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001532
Ralf Baechle20399732005-10-19 15:39:05 +01001533 __raw_writeq(0, s->sbm_rxfilter);
1534 __raw_writeq(0, s->sbm_imr);
1535 __raw_writeq(framecfg, s->sbm_framecfg);
1536 __raw_writeq(fifo, s->sbm_fifocfg);
1537 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001538
Linus Torvalds1da177e2005-04-16 15:20:36 -07001539 /*
1540 * Initialize DMA channels (rings should be ok now)
1541 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001542
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 sbdma_channel_start(&(s->sbm_rxdma), DMA_RX);
1544 sbdma_channel_start(&(s->sbm_txdma), DMA_TX);
Ralf Baechle74b02472005-10-19 15:40:02 +01001545
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 /*
1547 * Configure the speed, duplex, and flow control
1548 */
1549
1550 sbmac_set_speed(s,s->sbm_speed);
1551 sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc);
Ralf Baechle74b02472005-10-19 15:40:02 +01001552
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553 /*
1554 * Fill the receive ring
1555 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001556
Stephen Hemminger789585e2008-05-18 04:45:09 +01001557 sbdma_fillring(s, &(s->sbm_rxdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001558
1559 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 * Turn on the rest of the bits in the enable register
Ralf Baechle74b02472005-10-19 15:40:02 +01001561 */
1562
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001563#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
1564 __raw_writeq(M_MAC_RXDMA_EN0 |
1565 M_MAC_TXDMA_EN0, s->sbm_macenable);
1566#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
Ralf Baechle20399732005-10-19 15:39:05 +01001567 __raw_writeq(M_MAC_RXDMA_EN0 |
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 M_MAC_TXDMA_EN0 |
1569 M_MAC_RX_ENABLE |
Ralf Baechle20399732005-10-19 15:39:05 +01001570 M_MAC_TX_ENABLE, s->sbm_macenable);
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001571#else
Thomas Weber0b1974d2010-09-23 11:46:48 +02001572#error invalid SiByte MAC configuration
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001573#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574
1575#ifdef CONFIG_SBMAC_COALESCE
Ralf Baechle20399732005-10-19 15:39:05 +01001576 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1577 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578#else
Ralf Baechle20399732005-10-19 15:39:05 +01001579 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1580 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581#endif
Ralf Baechle74b02472005-10-19 15:40:02 +01001582
Linus Torvalds1da177e2005-04-16 15:20:36 -07001583 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001584 * Enable receiving unicasts and broadcasts
Linus Torvalds1da177e2005-04-16 15:20:36 -07001585 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001586
1587 __raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter);
1588
1589 /*
1590 * we're running now.
1591 */
1592
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593 s->sbm_state = sbmac_state_on;
Ralf Baechle74b02472005-10-19 15:40:02 +01001594
1595 /*
1596 * Program multicast addresses
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001598
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 sbmac_setmulti(s);
Ralf Baechle74b02472005-10-19 15:40:02 +01001600
1601 /*
1602 * If channel was in promiscuous mode before, turn that on
Linus Torvalds1da177e2005-04-16 15:20:36 -07001603 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001604
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 if (s->sbm_devflags & IFF_PROMISC) {
1606 sbmac_promiscuous_mode(s,1);
1607 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001608
Linus Torvalds1da177e2005-04-16 15:20:36 -07001609}
1610
1611
1612/**********************************************************************
1613 * SBMAC_CHANNEL_STOP(s)
Ralf Baechle74b02472005-10-19 15:40:02 +01001614 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 * Stop packet processing on this MAC.
Ralf Baechle74b02472005-10-19 15:40:02 +01001616 *
1617 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 * s - sbmac structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001619 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 * Return value:
1621 * nothing
1622 ********************************************************************* */
1623
1624static void sbmac_channel_stop(struct sbmac_softc *s)
1625{
1626 /* don't do this if already stopped */
Ralf Baechle74b02472005-10-19 15:40:02 +01001627
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628 if (s->sbm_state == sbmac_state_off)
1629 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001630
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 /* don't accept any packets, disable all interrupts */
Ralf Baechle74b02472005-10-19 15:40:02 +01001632
Ralf Baechle20399732005-10-19 15:39:05 +01001633 __raw_writeq(0, s->sbm_rxfilter);
1634 __raw_writeq(0, s->sbm_imr);
Ralf Baechle74b02472005-10-19 15:40:02 +01001635
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 /* Turn off ticker */
Ralf Baechle74b02472005-10-19 15:40:02 +01001637
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638 /* XXX */
Ralf Baechle74b02472005-10-19 15:40:02 +01001639
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640 /* turn off receiver and transmitter */
Ralf Baechle74b02472005-10-19 15:40:02 +01001641
Ralf Baechle20399732005-10-19 15:39:05 +01001642 __raw_writeq(0, s->sbm_macenable);
Ralf Baechle74b02472005-10-19 15:40:02 +01001643
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 /* We're stopped now. */
Ralf Baechle74b02472005-10-19 15:40:02 +01001645
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 s->sbm_state = sbmac_state_off;
Ralf Baechle74b02472005-10-19 15:40:02 +01001647
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 /*
1649 * Stop DMA channels (rings should be ok now)
1650 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001651
Linus Torvalds1da177e2005-04-16 15:20:36 -07001652 sbdma_channel_stop(&(s->sbm_rxdma));
1653 sbdma_channel_stop(&(s->sbm_txdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001654
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 /* Empty the receive and transmit rings */
Ralf Baechle74b02472005-10-19 15:40:02 +01001656
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 sbdma_emptyring(&(s->sbm_rxdma));
1658 sbdma_emptyring(&(s->sbm_txdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01001659
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660}
1661
1662/**********************************************************************
1663 * SBMAC_SET_CHANNEL_STATE(state)
Ralf Baechle74b02472005-10-19 15:40:02 +01001664 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 * Set the channel's state ON or OFF
Ralf Baechle74b02472005-10-19 15:40:02 +01001666 *
1667 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 * state - new state
Ralf Baechle74b02472005-10-19 15:40:02 +01001669 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 * Return value:
1671 * old state
1672 ********************************************************************* */
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001673static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *sc,
1674 enum sbmac_state state)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675{
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001676 enum sbmac_state oldstate = sc->sbm_state;
Ralf Baechle74b02472005-10-19 15:40:02 +01001677
Linus Torvalds1da177e2005-04-16 15:20:36 -07001678 /*
1679 * If same as previous state, return
1680 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001681
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 if (state == oldstate) {
1683 return oldstate;
1684 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001685
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001687 * If new state is ON, turn channel on
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001689
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 if (state == sbmac_state_on) {
1691 sbmac_channel_start(sc);
1692 }
1693 else {
1694 sbmac_channel_stop(sc);
1695 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001696
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697 /*
1698 * Return previous state
1699 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001700
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 return oldstate;
1702}
1703
1704
1705/**********************************************************************
1706 * SBMAC_PROMISCUOUS_MODE(sc,onoff)
Ralf Baechle74b02472005-10-19 15:40:02 +01001707 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708 * Turn on or off promiscuous mode
Ralf Baechle74b02472005-10-19 15:40:02 +01001709 *
1710 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001711 * sc - softc
1712 * onoff - 1 to turn on, 0 to turn off
Ralf Baechle74b02472005-10-19 15:40:02 +01001713 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 * Return value:
1715 * nothing
1716 ********************************************************************* */
1717
1718static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff)
1719{
1720 uint64_t reg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001721
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722 if (sc->sbm_state != sbmac_state_on)
1723 return;
Ralf Baechle74b02472005-10-19 15:40:02 +01001724
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725 if (onoff) {
Ralf Baechle20399732005-10-19 15:39:05 +01001726 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727 reg |= M_MAC_ALLPKT_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01001728 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001729 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730 else {
Ralf Baechle20399732005-10-19 15:39:05 +01001731 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 reg &= ~M_MAC_ALLPKT_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01001733 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734 }
1735}
1736
1737/**********************************************************************
1738 * SBMAC_SETIPHDR_OFFSET(sc,onoff)
Ralf Baechle74b02472005-10-19 15:40:02 +01001739 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 * Set the iphdr offset as 15 assuming ethernet encapsulation
Ralf Baechle74b02472005-10-19 15:40:02 +01001741 *
1742 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 * sc - softc
Ralf Baechle74b02472005-10-19 15:40:02 +01001744 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 * Return value:
1746 * nothing
1747 ********************************************************************* */
1748
1749static void sbmac_set_iphdr_offset(struct sbmac_softc *sc)
1750{
1751 uint64_t reg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001752
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 /* Hard code the off set to 15 for now */
Ralf Baechle20399732005-10-19 15:39:05 +01001754 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15);
Ralf Baechle20399732005-10-19 15:39:05 +01001756 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01001757
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001758 /* BCM1250 pass1 didn't have hardware checksum. Everything
1759 later does. */
1760 if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 sc->rx_hw_checksum = DISABLE;
Ralf Baechlef90fdc32006-02-08 23:23:26 +00001762 } else {
1763 sc->rx_hw_checksum = ENABLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764 }
1765}
1766
1767
1768/**********************************************************************
1769 * SBMAC_ADDR2REG(ptr)
Ralf Baechle74b02472005-10-19 15:40:02 +01001770 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771 * Convert six bytes into the 64-bit register value that
1772 * we typically write into the SBMAC's address/mcast registers
Ralf Baechle74b02472005-10-19 15:40:02 +01001773 *
1774 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 * ptr - pointer to 6 bytes
Ralf Baechle74b02472005-10-19 15:40:02 +01001776 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 * Return value:
1778 * register value
1779 ********************************************************************* */
1780
1781static uint64_t sbmac_addr2reg(unsigned char *ptr)
1782{
1783 uint64_t reg = 0;
Ralf Baechle74b02472005-10-19 15:40:02 +01001784
Linus Torvalds1da177e2005-04-16 15:20:36 -07001785 ptr += 6;
Ralf Baechle74b02472005-10-19 15:40:02 +01001786
1787 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001789 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001791 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001793 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001795 reg |= (uint64_t) *(--ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 reg <<= 8;
Ralf Baechle74b02472005-10-19 15:40:02 +01001797 reg |= (uint64_t) *(--ptr);
1798
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 return reg;
1800}
1801
1802
1803/**********************************************************************
1804 * SBMAC_SET_SPEED(s,speed)
Ralf Baechle74b02472005-10-19 15:40:02 +01001805 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 * Configure LAN speed for the specified MAC.
1807 * Warning: must be called when MAC is off!
Ralf Baechle74b02472005-10-19 15:40:02 +01001808 *
1809 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810 * s - sbmac structure
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001811 * speed - speed to set MAC to (see enum sbmac_speed)
Ralf Baechle74b02472005-10-19 15:40:02 +01001812 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 * Return value:
1814 * 1 if successful
1815 * 0 indicates invalid parameters
1816 ********************************************************************* */
1817
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001818static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819{
1820 uint64_t cfg;
1821 uint64_t framecfg;
1822
1823 /*
1824 * Save new current values
1825 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001826
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 s->sbm_speed = speed;
Ralf Baechle74b02472005-10-19 15:40:02 +01001828
Linus Torvalds1da177e2005-04-16 15:20:36 -07001829 if (s->sbm_state == sbmac_state_on)
1830 return 0; /* save for next restart */
1831
1832 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001833 * Read current register values
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001835
Ralf Baechle20399732005-10-19 15:39:05 +01001836 cfg = __raw_readq(s->sbm_maccfg);
1837 framecfg = __raw_readq(s->sbm_framecfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001838
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 /*
1840 * Mask out the stuff we want to change
1841 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001842
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL);
1844 framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH |
1845 M_MAC_SLOT_SIZE);
Ralf Baechle74b02472005-10-19 15:40:02 +01001846
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 /*
1848 * Now add in the new bits
1849 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001850
Linus Torvalds1da177e2005-04-16 15:20:36 -07001851 switch (speed) {
1852 case sbmac_speed_10:
1853 framecfg |= V_MAC_IFG_RX_10 |
1854 V_MAC_IFG_TX_10 |
1855 K_MAC_IFG_THRSH_10 |
1856 V_MAC_SLOT_SIZE_10;
1857 cfg |= V_MAC_SPEED_SEL_10MBPS;
1858 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001859
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860 case sbmac_speed_100:
1861 framecfg |= V_MAC_IFG_RX_100 |
1862 V_MAC_IFG_TX_100 |
1863 V_MAC_IFG_THRSH_100 |
1864 V_MAC_SLOT_SIZE_100;
1865 cfg |= V_MAC_SPEED_SEL_100MBPS ;
1866 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001867
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 case sbmac_speed_1000:
1869 framecfg |= V_MAC_IFG_RX_1000 |
1870 V_MAC_IFG_TX_1000 |
1871 V_MAC_IFG_THRSH_1000 |
1872 V_MAC_SLOT_SIZE_1000;
1873 cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN;
1874 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001875
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 default:
1877 return 0;
1878 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001879
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001881 * Send the bits back to the hardware
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001883
Ralf Baechle20399732005-10-19 15:39:05 +01001884 __raw_writeq(framecfg, s->sbm_framecfg);
1885 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001886
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 return 1;
1888}
1889
1890/**********************************************************************
1891 * SBMAC_SET_DUPLEX(s,duplex,fc)
Ralf Baechle74b02472005-10-19 15:40:02 +01001892 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 * Set Ethernet duplex and flow control options for this MAC
1894 * Warning: must be called when MAC is off!
Ralf Baechle74b02472005-10-19 15:40:02 +01001895 *
1896 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 * s - sbmac structure
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001898 * duplex - duplex setting (see enum sbmac_duplex)
1899 * fc - flow control setting (see enum sbmac_fc)
Ralf Baechle74b02472005-10-19 15:40:02 +01001900 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 * Return value:
1902 * 1 if ok
1903 * 0 if an invalid parameter combination was specified
1904 ********************************************************************* */
1905
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01001906static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
1907 enum sbmac_fc fc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908{
1909 uint64_t cfg;
Ralf Baechle74b02472005-10-19 15:40:02 +01001910
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911 /*
1912 * Save new current values
1913 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001914
Linus Torvalds1da177e2005-04-16 15:20:36 -07001915 s->sbm_duplex = duplex;
1916 s->sbm_fc = fc;
Ralf Baechle74b02472005-10-19 15:40:02 +01001917
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 if (s->sbm_state == sbmac_state_on)
1919 return 0; /* save for next restart */
Ralf Baechle74b02472005-10-19 15:40:02 +01001920
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001922 * Read current register values
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001924
Ralf Baechle20399732005-10-19 15:39:05 +01001925 cfg = __raw_readq(s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001926
Linus Torvalds1da177e2005-04-16 15:20:36 -07001927 /*
1928 * Mask off the stuff we're about to change
1929 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001930
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN);
Ralf Baechle74b02472005-10-19 15:40:02 +01001932
1933
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 switch (duplex) {
1935 case sbmac_duplex_half:
1936 switch (fc) {
1937 case sbmac_fc_disabled:
1938 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED;
1939 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001940
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 case sbmac_fc_collision:
1942 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED;
1943 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001944
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 case sbmac_fc_carrier:
1946 cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR;
1947 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001948
Linus Torvalds1da177e2005-04-16 15:20:36 -07001949 case sbmac_fc_frame: /* not valid in half duplex */
1950 default: /* invalid selection */
1951 return 0;
1952 }
1953 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001954
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 case sbmac_duplex_full:
1956 switch (fc) {
1957 case sbmac_fc_disabled:
1958 cfg |= V_MAC_FC_CMD_DISABLED;
1959 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001960
Linus Torvalds1da177e2005-04-16 15:20:36 -07001961 case sbmac_fc_frame:
1962 cfg |= V_MAC_FC_CMD_ENABLED;
1963 break;
Ralf Baechle74b02472005-10-19 15:40:02 +01001964
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 case sbmac_fc_collision: /* not valid in full duplex */
1966 case sbmac_fc_carrier: /* not valid in full duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967 default:
1968 return 0;
1969 }
1970 break;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01001971 default:
1972 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 }
Ralf Baechle74b02472005-10-19 15:40:02 +01001974
Linus Torvalds1da177e2005-04-16 15:20:36 -07001975 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01001976 * Send the bits back to the hardware
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 */
Ralf Baechle74b02472005-10-19 15:40:02 +01001978
Ralf Baechle20399732005-10-19 15:39:05 +01001979 __raw_writeq(cfg, s->sbm_maccfg);
Ralf Baechle74b02472005-10-19 15:40:02 +01001980
Linus Torvalds1da177e2005-04-16 15:20:36 -07001981 return 1;
1982}
1983
1984
1985
1986
1987/**********************************************************************
1988 * SBMAC_INTR()
Ralf Baechle74b02472005-10-19 15:40:02 +01001989 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 * Interrupt handler for MAC interrupts
Ralf Baechle74b02472005-10-19 15:40:02 +01001991 *
1992 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 * MAC structure
Ralf Baechle74b02472005-10-19 15:40:02 +01001994 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001995 * Return value:
1996 * nothing
1997 ********************************************************************* */
David Howells7d12e782006-10-05 14:55:46 +01001998static irqreturn_t sbmac_intr(int irq,void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999{
2000 struct net_device *dev = (struct net_device *) dev_instance;
2001 struct sbmac_softc *sc = netdev_priv(dev);
2002 uint64_t isr;
2003 int handled = 0;
2004
Mark Mason693aa942007-04-26 00:23:22 -07002005 /*
2006 * Read the ISR (this clears the bits in the real
2007 * register, except for counter addr)
2008 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002009
Mark Mason693aa942007-04-26 00:23:22 -07002010 isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
Ralf Baechle74b02472005-10-19 15:40:02 +01002011
Mark Mason693aa942007-04-26 00:23:22 -07002012 if (isr == 0)
2013 return IRQ_RETVAL(0);
2014 handled = 1;
Ralf Baechle74b02472005-10-19 15:40:02 +01002015
Mark Mason693aa942007-04-26 00:23:22 -07002016 /*
2017 * Transmits on channel 0
2018 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002020 if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
Mark Mason693aa942007-04-26 00:23:22 -07002021 sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
Ralf Baechle74b02472005-10-19 15:40:02 +01002022
Mark Mason693aa942007-04-26 00:23:22 -07002023 if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002024 if (napi_schedule_prep(&sc->napi)) {
Mark Mason693aa942007-04-26 00:23:22 -07002025 __raw_writeq(0, sc->sbm_imr);
Ben Hutchings288379f2009-01-19 16:43:59 -08002026 __napi_schedule(&sc->napi);
Mark Mason693aa942007-04-26 00:23:22 -07002027 /* Depend on the exit from poll to reenable intr */
2028 }
2029 else {
2030 /* may leave some packets behind */
2031 sbdma_rx_process(sc,&(sc->sbm_rxdma),
2032 SBMAC_MAX_RXDESCR * 2, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002033 }
2034 }
2035 return IRQ_RETVAL(handled);
2036}
2037
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038/**********************************************************************
2039 * SBMAC_START_TX(skb,dev)
Ralf Baechle74b02472005-10-19 15:40:02 +01002040 *
2041 * Start output on the specified interface. Basically, we
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042 * queue as many buffers as we can until the ring fills up, or
2043 * we run off the end of the queue, whichever comes first.
Ralf Baechle74b02472005-10-19 15:40:02 +01002044 *
2045 * Input parameters:
2046 *
2047 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 * Return value:
2049 * nothing
2050 ********************************************************************* */
2051static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
2052{
2053 struct sbmac_softc *sc = netdev_priv(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002054 unsigned long flags;
Ralf Baechle74b02472005-10-19 15:40:02 +01002055
Linus Torvalds1da177e2005-04-16 15:20:36 -07002056 /* lock eth irq */
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002057 spin_lock_irqsave(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002058
Linus Torvalds1da177e2005-04-16 15:20:36 -07002059 /*
Ralf Baechle74b02472005-10-19 15:40:02 +01002060 * Put the buffer on the transmit ring. If we
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 * don't have room, stop the queue.
2062 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002063
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064 if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
2065 /* XXX save skb that we could not send */
2066 netif_stop_queue(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002067 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002068
Patrick McHardy5b548142009-06-12 06:22:29 +00002069 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002071
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002072 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002073
Patrick McHardy6ed10652009-06-23 06:03:08 +00002074 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075}
2076
2077/**********************************************************************
2078 * SBMAC_SETMULTI(sc)
Ralf Baechle74b02472005-10-19 15:40:02 +01002079 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002080 * Reprogram the multicast table into the hardware, given
2081 * the list of multicasts associated with the interface
2082 * structure.
Ralf Baechle74b02472005-10-19 15:40:02 +01002083 *
2084 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085 * sc - softc
Ralf Baechle74b02472005-10-19 15:40:02 +01002086 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087 * Return value:
2088 * nothing
2089 ********************************************************************* */
2090
2091static void sbmac_setmulti(struct sbmac_softc *sc)
2092{
2093 uint64_t reg;
Maciej W. Rozycki73d73962007-09-20 19:14:01 +01002094 void __iomem *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095 int idx;
Jiri Pirko22bedad32010-04-01 21:22:57 +00002096 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 struct net_device *dev = sc->sbm_dev;
Ralf Baechle74b02472005-10-19 15:40:02 +01002098
2099 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 * Clear out entire multicast table. We do this by nuking
2101 * the entire hash table and all the direct matches except
Ralf Baechle74b02472005-10-19 15:40:02 +01002102 * the first one, which is used for our station address
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002104
Linus Torvalds1da177e2005-04-16 15:20:36 -07002105 for (idx = 1; idx < MAC_ADDR_COUNT; idx++) {
2106 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002107 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002109
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110 for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
2111 port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002112 __raw_writeq(0, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002114
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115 /*
2116 * Clear the filter to say we don't want any multicasts.
2117 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002118
Ralf Baechle20399732005-10-19 15:39:05 +01002119 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002120 reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
Ralf Baechle20399732005-10-19 15:39:05 +01002121 __raw_writeq(reg, sc->sbm_rxfilter);
Ralf Baechle74b02472005-10-19 15:40:02 +01002122
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 if (dev->flags & IFF_ALLMULTI) {
Ralf Baechle74b02472005-10-19 15:40:02 +01002124 /*
2125 * Enable ALL multicasts. Do this by inverting the
2126 * multicast enable bit.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002127 */
Ralf Baechle20399732005-10-19 15:39:05 +01002128 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129 reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
Ralf Baechle20399732005-10-19 15:39:05 +01002130 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002131 return;
2132 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133
Ralf Baechle74b02472005-10-19 15:40:02 +01002134
2135 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 * Progam new multicast entries. For now, only use the
2137 * perfect filter. In the future we'll need to use the
2138 * hash filter if the perfect filter overflows
2139 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002140
Linus Torvalds1da177e2005-04-16 15:20:36 -07002141 /* XXX only using perfect filter for now, need to use hash
2142 * XXX if the table overflows */
Ralf Baechle74b02472005-10-19 15:40:02 +01002143
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 idx = 1; /* skip station address */
Jiri Pirko22bedad32010-04-01 21:22:57 +00002145 netdev_for_each_mc_addr(ha, dev) {
Jiri Pirko55085902010-02-18 00:42:54 +00002146 if (idx == MAC_ADDR_COUNT)
2147 break;
Jiri Pirko22bedad32010-04-01 21:22:57 +00002148 reg = sbmac_addr2reg(ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t));
Ralf Baechle20399732005-10-19 15:39:05 +01002150 __raw_writeq(reg, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 idx++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002153
2154 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002155 * Enable the "accept multicast bits" if we programmed at least one
Ralf Baechle74b02472005-10-19 15:40:02 +01002156 * multicast.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002157 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002158
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 if (idx > 1) {
Ralf Baechle20399732005-10-19 15:39:05 +01002160 reg = __raw_readq(sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002161 reg |= M_MAC_MCAST_EN;
Ralf Baechle20399732005-10-19 15:39:05 +01002162 __raw_writeq(reg, sc->sbm_rxfilter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 }
2164}
2165
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166static int sb1250_change_mtu(struct net_device *_dev, int new_mtu)
2167{
2168 if (new_mtu > ENET_PACKET_SIZE)
2169 return -EINVAL;
2170 _dev->mtu = new_mtu;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002171 pr_info("changing the mtu to %d\n", new_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 return 0;
2173}
2174
Alexander Beregalovb4cf3422009-04-15 12:52:57 +00002175static const struct net_device_ops sbmac_netdev_ops = {
2176 .ndo_open = sbmac_open,
2177 .ndo_stop = sbmac_close,
2178 .ndo_start_xmit = sbmac_start_tx,
2179 .ndo_set_multicast_list = sbmac_set_rx_mode,
2180 .ndo_tx_timeout = sbmac_tx_timeout,
2181 .ndo_do_ioctl = sbmac_mii_ioctl,
2182 .ndo_change_mtu = sb1250_change_mtu,
2183 .ndo_validate_addr = eth_validate_addr,
2184 .ndo_set_mac_address = eth_mac_addr,
2185#ifdef CONFIG_NET_POLL_CONTROLLER
2186 .ndo_poll_controller = sbmac_netpoll,
2187#endif
2188};
2189
Linus Torvalds1da177e2005-04-16 15:20:36 -07002190/**********************************************************************
2191 * SBMAC_INIT(dev)
Ralf Baechle74b02472005-10-19 15:40:02 +01002192 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002193 * Attach routine - init hardware and hook ourselves into linux
Ralf Baechle74b02472005-10-19 15:40:02 +01002194 *
2195 * Input parameters:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 * dev - net_device structure
Ralf Baechle74b02472005-10-19 15:40:02 +01002197 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 * Return value:
2199 * status
2200 ********************************************************************* */
2201
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002202static int sbmac_init(struct platform_device *pldev, long long base)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002203{
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002204 struct net_device *dev = dev_get_drvdata(&pldev->dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002205 int idx = pldev->id;
2206 struct sbmac_softc *sc = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002207 unsigned char *eaddr;
2208 uint64_t ea_reg;
2209 int i;
2210 int err;
Ralf Baechle74b02472005-10-19 15:40:02 +01002211
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 sc->sbm_dev = dev;
2213 sc->sbe_idx = idx;
Ralf Baechle74b02472005-10-19 15:40:02 +01002214
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215 eaddr = sc->sbm_hwaddr;
Ralf Baechle74b02472005-10-19 15:40:02 +01002216
2217 /*
Nick Andrew877d0312009-01-26 11:06:57 +01002218 * Read the ethernet address. The firmware left this programmed
Linus Torvalds1da177e2005-04-16 15:20:36 -07002219 * for us in the ethernet address register for each mac.
2220 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002221
Ralf Baechle20399732005-10-19 15:39:05 +01002222 ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR);
2223 __raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224 for (i = 0; i < 6; i++) {
2225 eaddr[i] = (uint8_t) (ea_reg & 0xFF);
2226 ea_reg >>= 8;
2227 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002228
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 for (i = 0; i < 6; i++) {
2230 dev->dev_addr[i] = eaddr[i];
2231 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002232
Ralf Baechle74b02472005-10-19 15:40:02 +01002233 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 * Initialize context (get pointers to registers and stuff), then
2235 * allocate the memory for the descriptor tables.
2236 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002237
Linus Torvalds1da177e2005-04-16 15:20:36 -07002238 sbmac_initctx(sc);
Ralf Baechle74b02472005-10-19 15:40:02 +01002239
Linus Torvalds1da177e2005-04-16 15:20:36 -07002240 /*
2241 * Set up Linux device callins
2242 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002243
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 spin_lock_init(&(sc->sbm_lock));
Ralf Baechle74b02472005-10-19 15:40:02 +01002245
Alexander Beregalovb4cf3422009-04-15 12:52:57 +00002246 dev->netdev_ops = &sbmac_netdev_ops;
2247 dev->watchdog_timeo = TX_TIMEOUT;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002248
2249 netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002250
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002251 dev->irq = UNIT_INT(idx);
2252
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 /* This is needed for PASS2 for Rx H/W checksum feature */
2254 sbmac_set_iphdr_offset(sc);
2255
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002256 sc->mii_bus = mdiobus_alloc();
2257 if (sc->mii_bus == NULL) {
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002258 err = -ENOMEM;
2259 goto uninit_ctx;
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002260 }
2261
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002262 sc->mii_bus->name = sbmac_mdio_string;
2263 snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%x", idx);
2264 sc->mii_bus->priv = sc;
2265 sc->mii_bus->read = sbmac_mii_read;
2266 sc->mii_bus->write = sbmac_mii_write;
2267 sc->mii_bus->irq = sc->phy_irq;
2268 for (i = 0; i < PHY_MAX_ADDR; ++i)
2269 sc->mii_bus->irq[i] = SBMAC_PHY_INT;
2270
2271 sc->mii_bus->parent = &pldev->dev;
2272 /*
2273 * Probe PHY address
2274 */
2275 err = mdiobus_register(sc->mii_bus);
2276 if (err) {
2277 printk(KERN_ERR "%s: unable to register MDIO bus\n",
2278 dev->name);
2279 goto free_mdio;
2280 }
2281 dev_set_drvdata(&pldev->dev, sc->mii_bus);
2282
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 err = register_netdev(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002284 if (err) {
2285 printk(KERN_ERR "%s.%d: unable to register netdev\n",
2286 sbmac_string, idx);
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002287 goto unreg_mdio;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 }
2289
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002290 pr_info("%s.%d: registered as %s\n", sbmac_string, idx, dev->name);
2291
2292 if (sc->rx_hw_checksum == ENABLE)
2293 pr_info("%s: enabling TCP rcv checksum\n", dev->name);
2294
Linus Torvalds1da177e2005-04-16 15:20:36 -07002295 /*
2296 * Display Ethernet address (this is called during the config
2297 * process so we need to finish off the config message that
2298 * was being displayed)
2299 */
Johannes Berge1749612008-10-27 15:59:26 -07002300 pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %pM\n",
2301 dev->name, base, eaddr);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002302
Linus Torvalds1da177e2005-04-16 15:20:36 -07002303 return 0;
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002304unreg_mdio:
2305 mdiobus_unregister(sc->mii_bus);
2306 dev_set_drvdata(&pldev->dev, NULL);
2307free_mdio:
2308 mdiobus_free(sc->mii_bus);
2309uninit_ctx:
2310 sbmac_uninitctx(sc);
2311 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312}
2313
2314
2315static int sbmac_open(struct net_device *dev)
2316{
2317 struct sbmac_softc *sc = netdev_priv(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002318 int err;
Ralf Baechle74b02472005-10-19 15:40:02 +01002319
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002320 if (debug > 1)
2321 pr_debug("%s: sbmac_open() irq %d.\n", dev->name, dev->irq);
Ralf Baechle74b02472005-10-19 15:40:02 +01002322
2323 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 * map/route interrupt (clear status first, in case something
2325 * weird is pending; we haven't initialized the mac registers
2326 * yet)
2327 */
2328
Ralf Baechle20399732005-10-19 15:39:05 +01002329 __raw_readq(sc->sbm_isr);
Joe Perchesa0607fd2009-11-18 23:29:17 -08002330 err = request_irq(dev->irq, sbmac_intr, IRQF_SHARED, dev->name, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002331 if (err) {
2332 printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name,
2333 dev->irq);
2334 goto out_err;
Ralf Baechle59b81822005-10-20 12:01:28 +01002335 }
2336
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002337 sc->sbm_speed = sbmac_speed_none;
2338 sc->sbm_duplex = sbmac_duplex_none;
2339 sc->sbm_fc = sbmac_fc_none;
2340 sc->sbm_pause = -1;
2341 sc->sbm_link = 0;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002342
Ralf Baechle59b81822005-10-20 12:01:28 +01002343 /*
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002344 * Attach to the PHY
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345 */
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002346 err = sbmac_mii_probe(dev);
2347 if (err)
2348 goto out_unregister;
Ralf Baechle74b02472005-10-19 15:40:02 +01002349
Linus Torvalds1da177e2005-04-16 15:20:36 -07002350 /*
2351 * Turn on the channel
2352 */
2353
2354 sbmac_set_channel_state(sc,sbmac_state_on);
Ralf Baechle74b02472005-10-19 15:40:02 +01002355
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356 netif_start_queue(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002357
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358 sbmac_set_rx_mode(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002359
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002360 phy_start(sc->phy_dev);
2361
2362 napi_enable(&sc->napi);
Ralf Baechle74b02472005-10-19 15:40:02 +01002363
Linus Torvalds1da177e2005-04-16 15:20:36 -07002364 return 0;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002365
2366out_unregister:
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002367 free_irq(dev->irq, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002368out_err:
2369 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002370}
2371
Ralf Baechle59b81822005-10-20 12:01:28 +01002372static int sbmac_mii_probe(struct net_device *dev)
2373{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374 struct sbmac_softc *sc = netdev_priv(dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002375 struct phy_device *phy_dev;
2376 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002378 for (i = 0; i < PHY_MAX_ADDR; i++) {
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002379 phy_dev = sc->mii_bus->phy_map[i];
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002380 if (phy_dev)
2381 break;
2382 }
2383 if (!phy_dev) {
2384 printk(KERN_ERR "%s: no PHY found\n", dev->name);
2385 return -ENXIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002386 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002387
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002388 phy_dev = phy_connect(dev, dev_name(&phy_dev->dev), &sbmac_mii_poll, 0,
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002389 PHY_INTERFACE_MODE_GMII);
2390 if (IS_ERR(phy_dev)) {
2391 printk(KERN_ERR "%s: could not attach to PHY\n", dev->name);
2392 return PTR_ERR(phy_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002393 }
Ralf Baechle74b02472005-10-19 15:40:02 +01002394
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002395 /* Remove any features not supported by the controller */
2396 phy_dev->supported &= SUPPORTED_10baseT_Half |
2397 SUPPORTED_10baseT_Full |
2398 SUPPORTED_100baseT_Half |
2399 SUPPORTED_100baseT_Full |
2400 SUPPORTED_1000baseT_Half |
2401 SUPPORTED_1000baseT_Full |
2402 SUPPORTED_Autoneg |
2403 SUPPORTED_MII |
2404 SUPPORTED_Pause |
2405 SUPPORTED_Asym_Pause;
2406 phy_dev->advertising = phy_dev->supported;
Ralf Baechle74b02472005-10-19 15:40:02 +01002407
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002408 pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
2409 dev->name, phy_dev->drv->name,
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002410 dev_name(&phy_dev->dev), phy_dev->irq);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002411
2412 sc->phy_dev = phy_dev;
2413
2414 return 0;
2415}
2416
2417
2418static void sbmac_mii_poll(struct net_device *dev)
2419{
2420 struct sbmac_softc *sc = netdev_priv(dev);
2421 struct phy_device *phy_dev = sc->phy_dev;
2422 unsigned long flags;
2423 enum sbmac_fc fc;
2424 int link_chg, speed_chg, duplex_chg, pause_chg, fc_chg;
2425
2426 link_chg = (sc->sbm_link != phy_dev->link);
2427 speed_chg = (sc->sbm_speed != phy_dev->speed);
2428 duplex_chg = (sc->sbm_duplex != phy_dev->duplex);
2429 pause_chg = (sc->sbm_pause != phy_dev->pause);
2430
2431 if (!link_chg && !speed_chg && !duplex_chg && !pause_chg)
2432 return; /* Hmmm... */
2433
2434 if (!phy_dev->link) {
2435 if (link_chg) {
2436 sc->sbm_link = phy_dev->link;
2437 sc->sbm_speed = sbmac_speed_none;
2438 sc->sbm_duplex = sbmac_duplex_none;
2439 sc->sbm_fc = sbmac_fc_disabled;
2440 sc->sbm_pause = -1;
2441 pr_info("%s: link unavailable\n", dev->name);
2442 }
2443 return;
2444 }
2445
2446 if (phy_dev->duplex == DUPLEX_FULL) {
2447 if (phy_dev->pause)
2448 fc = sbmac_fc_frame;
2449 else
2450 fc = sbmac_fc_disabled;
2451 } else
2452 fc = sbmac_fc_collision;
2453 fc_chg = (sc->sbm_fc != fc);
2454
2455 pr_info("%s: link available: %dbase-%cD\n", dev->name, phy_dev->speed,
2456 phy_dev->duplex == DUPLEX_FULL ? 'F' : 'H');
2457
2458 spin_lock_irqsave(&sc->sbm_lock, flags);
2459
2460 sc->sbm_speed = phy_dev->speed;
2461 sc->sbm_duplex = phy_dev->duplex;
2462 sc->sbm_fc = fc;
2463 sc->sbm_pause = phy_dev->pause;
2464 sc->sbm_link = phy_dev->link;
2465
2466 if ((speed_chg || duplex_chg || fc_chg) &&
2467 sc->sbm_state != sbmac_state_off) {
2468 /*
2469 * something changed, restart the channel
2470 */
2471 if (debug > 1)
2472 pr_debug("%s: restarting channel "
2473 "because PHY state changed\n", dev->name);
2474 sbmac_channel_stop(sc);
2475 sbmac_channel_start(sc);
2476 }
2477
2478 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479}
2480
2481
2482static void sbmac_tx_timeout (struct net_device *dev)
2483{
2484 struct sbmac_softc *sc = netdev_priv(dev);
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002485 unsigned long flags;
Ralf Baechle74b02472005-10-19 15:40:02 +01002486
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002487 spin_lock_irqsave(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002488
2489
Eric Dumazet1ae5dc32010-05-10 05:01:31 -07002490 dev->trans_start = jiffies; /* prevent tx timeout */
Jeff Garzik09f75cd2007-10-03 17:41:50 -07002491 dev->stats.tx_errors++;
Ralf Baechle74b02472005-10-19 15:40:02 +01002492
Weiwei Wangbe61ea52008-09-18 08:23:48 +08002493 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002494
2495 printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
2496}
2497
2498
2499
2500
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501static void sbmac_set_rx_mode(struct net_device *dev)
2502{
2503 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002504 struct sbmac_softc *sc = netdev_priv(dev);
2505
2506 spin_lock_irqsave(&sc->sbm_lock, flags);
2507 if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
2508 /*
2509 * Promiscuous changed.
2510 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002511
2512 if (dev->flags & IFF_PROMISC) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002513 sbmac_promiscuous_mode(sc,1);
2514 }
2515 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516 sbmac_promiscuous_mode(sc,0);
2517 }
2518 }
2519 spin_unlock_irqrestore(&sc->sbm_lock, flags);
Ralf Baechle74b02472005-10-19 15:40:02 +01002520
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521 /*
2522 * Program the multicasts. Do this every time.
2523 */
Ralf Baechle74b02472005-10-19 15:40:02 +01002524
Linus Torvalds1da177e2005-04-16 15:20:36 -07002525 sbmac_setmulti(sc);
Ralf Baechle74b02472005-10-19 15:40:02 +01002526
Linus Torvalds1da177e2005-04-16 15:20:36 -07002527}
2528
2529static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2530{
2531 struct sbmac_softc *sc = netdev_priv(dev);
Ralf Baechle74b02472005-10-19 15:40:02 +01002532
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002533 if (!netif_running(dev) || !sc->phy_dev)
2534 return -EINVAL;
Ralf Baechle74b02472005-10-19 15:40:02 +01002535
Richard Cochran28b04112010-07-17 08:48:55 +00002536 return phy_mii_ioctl(sc->phy_dev, rq, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537}
2538
2539static int sbmac_close(struct net_device *dev)
2540{
2541 struct sbmac_softc *sc = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002542
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002543 napi_disable(&sc->napi);
2544
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002545 phy_stop(sc->phy_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002546
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002547 sbmac_set_channel_state(sc, sbmac_state_off);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548
2549 netif_stop_queue(dev);
2550
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002551 if (debug > 1)
2552 pr_debug("%s: Shutting down ethercard\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002554 phy_disconnect(sc->phy_dev);
2555 sc->phy_dev = NULL;
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002556 free_irq(dev->irq, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002557
2558 sbdma_emptyring(&(sc->sbm_txdma));
2559 sbdma_emptyring(&(sc->sbm_rxdma));
Ralf Baechle74b02472005-10-19 15:40:02 +01002560
Linus Torvalds1da177e2005-04-16 15:20:36 -07002561 return 0;
2562}
2563
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002564static int sbmac_poll(struct napi_struct *napi, int budget)
Mark Mason693aa942007-04-26 00:23:22 -07002565{
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002566 struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
Mark Mason693aa942007-04-26 00:23:22 -07002567 int work_done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002568
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002569 work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
Mark Mason693aa942007-04-26 00:23:22 -07002570 sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
2571
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002572 if (work_done < budget) {
Ben Hutchings288379f2009-01-19 16:43:59 -08002573 napi_complete(napi);
Mark Mason693aa942007-04-26 00:23:22 -07002574
2575#ifdef CONFIG_SBMAC_COALESCE
2576 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
2577 ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
2578 sc->sbm_imr);
2579#else
2580 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
2581 (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
2582#endif
2583 }
2584
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002585 return work_done;
Mark Mason693aa942007-04-26 00:23:22 -07002586}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002587
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002588
Uwe Kleine-Königffe85532009-07-21 11:25:25 +00002589static int __devinit sbmac_probe(struct platform_device *pldev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002590{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002591 struct net_device *dev;
2592 struct sbmac_softc *sc;
2593 void __iomem *sbm_base;
2594 struct resource *res;
2595 u64 sbmac_orig_hwaddr;
2596 int err;
2597
2598 res = platform_get_resource(pldev, IORESOURCE_MEM, 0);
2599 BUG_ON(!res);
Joe Perches28f65c112011-06-09 09:13:32 -07002600 sbm_base = ioremap_nocache(res->start, resource_size(res));
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002601 if (!sbm_base) {
2602 printk(KERN_ERR "%s: unable to map device registers\n",
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002603 dev_name(&pldev->dev));
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002604 err = -ENOMEM;
2605 goto out_out;
2606 }
2607
2608 /*
2609 * The R_MAC_ETHERNET_ADDR register will be set to some nonzero
2610 * value for us by the firmware if we're going to use this MAC.
2611 * If we find a zero, skip this MAC.
2612 */
2613 sbmac_orig_hwaddr = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR);
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002614 pr_debug("%s: %sconfiguring MAC at 0x%08Lx\n", dev_name(&pldev->dev),
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002615 sbmac_orig_hwaddr ? "" : "not ", (long long)res->start);
2616 if (sbmac_orig_hwaddr == 0) {
2617 err = 0;
2618 goto out_unmap;
2619 }
2620
2621 /*
2622 * Okay, cool. Initialize this MAC.
2623 */
2624 dev = alloc_etherdev(sizeof(struct sbmac_softc));
2625 if (!dev) {
2626 printk(KERN_ERR "%s: unable to allocate etherdev\n",
Kay Sieversdb1d7bf2009-01-26 21:12:58 -08002627 dev_name(&pldev->dev));
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002628 err = -ENOMEM;
2629 goto out_unmap;
2630 }
2631
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002632 dev_set_drvdata(&pldev->dev, dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002633 SET_NETDEV_DEV(dev, &pldev->dev);
2634
2635 sc = netdev_priv(dev);
2636 sc->sbm_base = sbm_base;
2637
2638 err = sbmac_init(pldev, res->start);
2639 if (err)
2640 goto out_kfree;
2641
2642 return 0;
2643
2644out_kfree:
2645 free_netdev(dev);
2646 __raw_writeq(sbmac_orig_hwaddr, sbm_base + R_MAC_ETHERNET_ADDR);
2647
2648out_unmap:
2649 iounmap(sbm_base);
2650
2651out_out:
2652 return err;
2653}
2654
2655static int __exit sbmac_remove(struct platform_device *pldev)
2656{
Greg Kroah-Hartmanc7ae0112009-05-04 21:33:19 -07002657 struct net_device *dev = dev_get_drvdata(&pldev->dev);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002658 struct sbmac_softc *sc = netdev_priv(dev);
2659
2660 unregister_netdev(dev);
2661 sbmac_uninitctx(sc);
Sebastian Siewior03f80cc2010-04-28 09:57:01 +00002662 mdiobus_unregister(sc->mii_bus);
Lennert Buytenhek298cf9be2008-10-08 16:29:57 -07002663 mdiobus_free(sc->mii_bus);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002664 iounmap(sc->sbm_base);
2665 free_netdev(dev);
2666
2667 return 0;
2668}
2669
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002670static struct platform_driver sbmac_driver = {
2671 .probe = sbmac_probe,
2672 .remove = __exit_p(sbmac_remove),
2673 .driver = {
2674 .name = sbmac_string,
Ralf Baechle33b665e2010-07-06 05:18:11 +00002675 .owner = THIS_MODULE,
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002676 },
2677};
2678
2679static int __init sbmac_init_module(void)
2680{
Sebastian Andrzej Siewior8cd9b132010-04-27 15:54:50 -07002681 return platform_driver_register(&sbmac_driver);
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002682}
2683
2684static void __exit sbmac_cleanup_module(void)
2685{
Maciej W. Rozyckif5279ff2007-09-21 12:52:10 +01002686 platform_driver_unregister(&sbmac_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002687}
2688
2689module_init(sbmac_init_module);
2690module_exit(sbmac_cleanup_module);