projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
net/mlx5e: TX latency optimization to save DMA reads
[deliverable/linux.git] / drivers / net / ethernet / realtek / 8139cp.c
CommitLineData
1da177e4
LT		 1/* 8139cp.c: A Linux PCI Ethernet driver for the RealTek 8139C+ chips. */
2/*
3 Copyright 2001-2004 Jeff Garzik <jgarzik@pobox.com>
4
5 Copyright (C) 2001, 2002 David S. Miller (davem@redhat.com) [tg3.c]
6 Copyright (C) 2000, 2001 David S. Miller (davem@redhat.com) [sungem.c]
7 Copyright 2001 Manfred Spraul [natsemi.c]
8 Copyright 1999-2001 by Donald Becker. [natsemi.c]
9 Written 1997-2001 by Donald Becker. [8139too.c]
10 Copyright 1998-2001 by Jes Sorensen, <jes@trained-monkey.org>. [acenic.c]
11
12 This software may be used and distributed according to the terms of
13 the GNU General Public License (GPL), incorporated herein by reference.
14 Drivers based on or derived from this code fall under the GPL and must
15 retain the authorship, copyright and license notice. This file is not
16 a complete program and may only be used when the entire operating
17 system is licensed under the GPL.
18
19 See the file COPYING in this distribution for more information.
20
21 Contributors:
f3b197ac 22
1da177e4
LT		 23 Wake-on-LAN support - Felipe Damasio <felipewd@terra.com.br>
24 PCI suspend/resume - Felipe Damasio <felipewd@terra.com.br>
25 LinkChg interrupt - Felipe Damasio <felipewd@terra.com.br>
f3b197ac 26
1da177e4
LT		 27 TODO:
28 * Test Tx checksumming thoroughly
1da177e4
LT		 29
30 Low priority TODO:
31 * Complete reset on PciErr
32 * Consider Rx interrupt mitigation using TimerIntr
33 * Investigate using skb->priority with h/w VLAN priority
34 * Investigate using High Priority Tx Queue with skb->priority
35 * Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error
36 * Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error
37 * Implement Tx software interrupt mitigation via
38 Tx descriptor bit
39 * The real minimum of CP_MIN_MTU is 4 bytes. However,
40 for this to be supported, one must(?) turn on packet padding.
41 * Support external MII transceivers (patch available)
42
43 NOTES:
44 * TX checksumming is considered experimental. It is off by
45 default, use ethtool to turn it on.
46
47 */
48
b4f18b3f
JP		 49#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50
1da177e4 51#define DRV_NAME "8139cp"
d5b20697 52#define DRV_VERSION "1.3"
1da177e4
LT		 53#define DRV_RELDATE "Mar 22, 2004"
54
55
1da177e4 56#include <linux/module.h>
e21ba282 57#include <linux/moduleparam.h>
1da177e4
LT		 58#include <linux/kernel.h>
59#include <linux/compiler.h>
60#include <linux/netdevice.h>
61#include <linux/etherdevice.h>
62#include <linux/init.h>
a6b7a407 63#include <linux/interrupt.h>
1da177e4 64#include <linux/pci.h>
8662d061 65#include <linux/dma-mapping.h>
1da177e4
LT		 66#include <linux/delay.h>
67#include <linux/ethtool.h>
5a0e3ad6 68#include <linux/gfp.h>
1da177e4
LT		 69#include <linux/mii.h>
70#include <linux/if_vlan.h>
71#include <linux/crc32.h>
72#include <linux/in.h>
73#include <linux/ip.h>
74#include <linux/tcp.h>
75#include <linux/udp.h>
76#include <linux/cache.h>
77#include <asm/io.h>
78#include <asm/irq.h>
79#include <asm/uaccess.h>
80
1da177e4
LT		 81/* These identify the driver base version and may not be removed. */
82static char version[] =
9cc40855 83DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE ")\n";
1da177e4
LT		 84
85MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
86MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver");
a78d8927 87MODULE_VERSION(DRV_VERSION);
1da177e4
LT		 88MODULE_LICENSE("GPL");
89
90static int debug = -1;
e21ba282 91module_param(debug, int, 0);
1da177e4
LT		 92MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
93
94/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
95 The RTL chips use a 64 element hash table based on the Ethernet CRC. */
96static int multicast_filter_limit = 32;
e21ba282 97module_param(multicast_filter_limit, int, 0);
1da177e4
LT		 98MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses");
99
1da177e4
LT		 100#define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
101 NETIF_MSG_PROBE | \
102 NETIF_MSG_LINK)
103#define CP_NUM_STATS 14 /* struct cp_dma_stats, plus one */
104#define CP_STATS_SIZE 64 /* size in bytes of DMA stats block */
105#define CP_REGS_SIZE (0xff + 1)
106#define CP_REGS_VER 1 /* version 1 */
107#define CP_RX_RING_SIZE 64
108#define CP_TX_RING_SIZE 64
109#define CP_RING_BYTES \
110 ((sizeof(struct cp_desc) * CP_RX_RING_SIZE) + \
111 (sizeof(struct cp_desc) * CP_TX_RING_SIZE) + \
112 CP_STATS_SIZE)
113#define NEXT_TX(N) (((N) + 1) & (CP_TX_RING_SIZE - 1))
114#define NEXT_RX(N) (((N) + 1) & (CP_RX_RING_SIZE - 1))
115#define TX_BUFFS_AVAIL(CP) \
116 (((CP)->tx_tail <= (CP)->tx_head) ? \
117 (CP)->tx_tail + (CP_TX_RING_SIZE - 1) - (CP)->tx_head : \
118 (CP)->tx_tail - (CP)->tx_head - 1)
119
120#define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
1da177e4
LT		 121#define CP_INTERNAL_PHY 32
122
123/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
124#define RX_FIFO_THRESH 5 /* Rx buffer level before first PCI xfer. */
125#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 */
126#define TX_DMA_BURST 6 /* Maximum PCI burst, '6' is 1024 */
127#define TX_EARLY_THRESH 256 /* Early Tx threshold, in bytes */
128
129/* Time in jiffies before concluding the transmitter is hung. */
130#define TX_TIMEOUT (6*HZ)
131
132/* hardware minimum and maximum for a single frame's data payload */
133#define CP_MIN_MTU 60 /* TODO: allow lower, but pad */
134#define CP_MAX_MTU 4096
135
136enum {
137 /* NIC register offsets */
138 MAC0 = 0x00, /* Ethernet hardware address. */
139 MAR0 = 0x08, /* Multicast filter. */
140 StatsAddr = 0x10, /* 64-bit start addr of 64-byte DMA stats blk */
141 TxRingAddr = 0x20, /* 64-bit start addr of Tx ring */
142 HiTxRingAddr = 0x28, /* 64-bit start addr of high priority Tx ring */
143 Cmd = 0x37, /* Command register */
144 IntrMask = 0x3C, /* Interrupt mask */
145 IntrStatus = 0x3E, /* Interrupt status */
146 TxConfig = 0x40, /* Tx configuration */
147 ChipVersion = 0x43, /* 8-bit chip version, inside TxConfig */
148 RxConfig = 0x44, /* Rx configuration */
149 RxMissed = 0x4C, /* 24 bits valid, write clears */
150 Cfg9346 = 0x50, /* EEPROM select/control; Cfg reg [un]lock */
151 Config1 = 0x52, /* Config1 */
152 Config3 = 0x59, /* Config3 */
153 Config4 = 0x5A, /* Config4 */
154 MultiIntr = 0x5C, /* Multiple interrupt select */
155 BasicModeCtrl = 0x62, /* MII BMCR */
156 BasicModeStatus = 0x64, /* MII BMSR */
157 NWayAdvert = 0x66, /* MII ADVERTISE */
158 NWayLPAR = 0x68, /* MII LPA */
159 NWayExpansion = 0x6A, /* MII Expansion */
160 Config5 = 0xD8, /* Config5 */
161 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
162 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
163 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
164 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
165 RxRingAddr = 0xE4, /* 64-bit start addr of Rx ring */
166 TxThresh = 0xEC, /* Early Tx threshold */
167 OldRxBufAddr = 0x30, /* DMA address of Rx ring buffer (C mode) */
168 OldTSD0 = 0x10, /* DMA address of first Tx desc (C mode) */
169
170 /* Tx and Rx status descriptors */
171 DescOwn = (1 << 31), /* Descriptor is owned by NIC */
172 RingEnd = (1 << 30), /* End of descriptor ring */
173 FirstFrag = (1 << 29), /* First segment of a packet */
174 LastFrag = (1 << 28), /* Final segment of a packet */
fcec3456
JG		 175 LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */
176 MSSShift = 16, /* MSS value position */
177 MSSMask = 0xfff, /* MSS value: 11 bits */
1da177e4
LT		 178 TxError = (1 << 23), /* Tx error summary */
179 RxError = (1 << 20), /* Rx error summary */
180 IPCS = (1 << 18), /* Calculate IP checksum */
181 UDPCS = (1 << 17), /* Calculate UDP/IP checksum */
182 TCPCS = (1 << 16), /* Calculate TCP/IP checksum */
183 TxVlanTag = (1 << 17), /* Add VLAN tag */
184 RxVlanTagged = (1 << 16), /* Rx VLAN tag available */
185 IPFail = (1 << 15), /* IP checksum failed */
186 UDPFail = (1 << 14), /* UDP/IP checksum failed */
187 TCPFail = (1 << 13), /* TCP/IP checksum failed */
188 NormalTxPoll = (1 << 6), /* One or more normal Tx packets to send */
189 PID1 = (1 << 17), /* 2 protocol id bits: 0==non-IP, */
190 PID0 = (1 << 16), /* 1==UDP/IP, 2==TCP/IP, 3==IP */
191 RxProtoTCP = 1,
192 RxProtoUDP = 2,
193 RxProtoIP = 3,
194 TxFIFOUnder = (1 << 25), /* Tx FIFO underrun */
195 TxOWC = (1 << 22), /* Tx Out-of-window collision */
196 TxLinkFail = (1 << 21), /* Link failed during Tx of packet */
197 TxMaxCol = (1 << 20), /* Tx aborted due to excessive collisions */
198 TxColCntShift = 16, /* Shift, to get 4-bit Tx collision cnt */
199 TxColCntMask = 0x01 | 0x02 | 0x04 | 0x08, /* 4-bit collision count */
200 RxErrFrame = (1 << 27), /* Rx frame alignment error */
201 RxMcast = (1 << 26), /* Rx multicast packet rcv'd */
202 RxErrCRC = (1 << 18), /* Rx CRC error */
203 RxErrRunt = (1 << 19), /* Rx error, packet < 64 bytes */
204 RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */
205 RxErrFIFO = (1 << 22), /* Rx error, FIFO overflowed, pkt bad */
206
207 /* StatsAddr register */
208 DumpStats = (1 << 3), /* Begin stats dump */
209
210 /* RxConfig register */
211 RxCfgFIFOShift = 13, /* Shift, to get Rx FIFO thresh value */
212 RxCfgDMAShift = 8, /* Shift, to get Rx Max DMA value */
213 AcceptErr = 0x20, /* Accept packets with CRC errors */
214 AcceptRunt = 0x10, /* Accept runt (<64 bytes) packets */
215 AcceptBroadcast = 0x08, /* Accept broadcast packets */
216 AcceptMulticast = 0x04, /* Accept multicast packets */
217 AcceptMyPhys = 0x02, /* Accept pkts with our MAC as dest */
218 AcceptAllPhys = 0x01, /* Accept all pkts w/ physical dest */
219
220 /* IntrMask / IntrStatus registers */
221 PciErr = (1 << 15), /* System error on the PCI bus */
222 TimerIntr = (1 << 14), /* Asserted when TCTR reaches TimerInt value */
223 LenChg = (1 << 13), /* Cable length change */
224 SWInt = (1 << 8), /* Software-requested interrupt */
225 TxEmpty = (1 << 7), /* No Tx descriptors available */
226 RxFIFOOvr = (1 << 6), /* Rx FIFO Overflow */
227 LinkChg = (1 << 5), /* Packet underrun, or link change */
228 RxEmpty = (1 << 4), /* No Rx descriptors available */
229 TxErr = (1 << 3), /* Tx error */
230 TxOK = (1 << 2), /* Tx packet sent */
231 RxErr = (1 << 1), /* Rx error */
232 RxOK = (1 << 0), /* Rx packet received */
233 IntrResvd = (1 << 10), /* reserved, according to RealTek engineers,
234 but hardware likes to raise it */
235
236 IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty |
237 RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK |
238 RxErr | RxOK | IntrResvd,
239
240 /* C mode command register */
241 CmdReset = (1 << 4), /* Enable to reset; self-clearing */
242 RxOn = (1 << 3), /* Rx mode enable */
243 TxOn = (1 << 2), /* Tx mode enable */
244
245 /* C+ mode command register */
246 RxVlanOn = (1 << 6), /* Rx VLAN de-tagging enable */
247 RxChkSum = (1 << 5), /* Rx checksum offload enable */
248 PCIDAC = (1 << 4), /* PCI Dual Address Cycle (64-bit PCI) */
249 PCIMulRW = (1 << 3), /* Enable PCI read/write multiple */
250 CpRxOn = (1 << 1), /* Rx mode enable */
251 CpTxOn = (1 << 0), /* Tx mode enable */
252
253 /* Cfg9436 EEPROM control register */
254 Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */
255 Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */
256
257 /* TxConfig register */
258 IFG = (1 << 25) | (1 << 24), /* standard IEEE interframe gap */
259 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
260
261 /* Early Tx Threshold register */
262 TxThreshMask = 0x3f, /* Mask bits 5-0 */
263 TxThreshMax = 2048, /* Max early Tx threshold */
264
265 /* Config1 register */
266 DriverLoaded = (1 << 5), /* Software marker, driver is loaded */
267 LWACT = (1 << 4), /* LWAKE active mode */
268 PMEnable = (1 << 0), /* Enable various PM features of chip */
269
270 /* Config3 register */
271 PARMEnable = (1 << 6), /* Enable auto-loading of PHY parms */
272 MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */
273 LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */
274
275 /* Config4 register */
276 LWPTN = (1 << 1), /* LWAKE Pattern */
277 LWPME = (1 << 4), /* LANWAKE vs PMEB */
278
279 /* Config5 register */
280 BWF = (1 << 6), /* Accept Broadcast wakeup frame */
281 MWF = (1 << 5), /* Accept Multicast wakeup frame */
282 UWF = (1 << 4), /* Accept Unicast wakeup frame */
283 LANWake = (1 << 1), /* Enable LANWake signal */
284 PMEStatus = (1 << 0), /* PME status can be reset by PCI RST# */
285
286 cp_norx_intr_mask = PciErr | LinkChg | TxOK | TxErr | TxEmpty,
287 cp_rx_intr_mask = RxOK | RxErr | RxEmpty | RxFIFOOvr,
288 cp_intr_mask = cp_rx_intr_mask | cp_norx_intr_mask,
289};
290
291static const unsigned int cp_rx_config =
292 (RX_FIFO_THRESH << RxCfgFIFOShift) |
293 (RX_DMA_BURST << RxCfgDMAShift);
294
295struct cp_desc {
03233b90 296 __le32 opts1;
cf983019 297 __le32 opts2;
03233b90 298 __le64 addr;
1da177e4
LT		 299};
300
1da177e4 301struct cp_dma_stats {
03233b90
AV		 302 __le64 tx_ok;
303 __le64 rx_ok;
304 __le64 tx_err;
305 __le32 rx_err;
306 __le16 rx_fifo;
307 __le16 frame_align;
308 __le32 tx_ok_1col;
309 __le32 tx_ok_mcol;
310 __le64 rx_ok_phys;
311 __le64 rx_ok_bcast;
312 __le32 rx_ok_mcast;
313 __le16 tx_abort;
314 __le16 tx_underrun;
ba2d3587 315} __packed;
1da177e4
LT		 316
317struct cp_extra_stats {
318 unsigned long rx_frags;
319};
320
321struct cp_private {
322 void __iomem *regs;
323 struct net_device *dev;
324 spinlock_t lock;
325 u32 msg_enable;
326
bea3348e
SH		 327 struct napi_struct napi;
328
1da177e4
LT		 329 struct pci_dev *pdev;
330 u32 rx_config;
331 u16 cpcmd;
332
1da177e4 333 struct cp_extra_stats cp_stats;
1da177e4 334
d03d376d
FR		 335 unsigned rx_head ____cacheline_aligned;
336 unsigned rx_tail;
1da177e4 337 struct cp_desc *rx_ring;
0ba894d4 338 struct sk_buff *rx_skb[CP_RX_RING_SIZE];
1da177e4
LT		 339
340 unsigned tx_head ____cacheline_aligned;
341 unsigned tx_tail;
1da177e4 342 struct cp_desc *tx_ring;
48907e39 343 struct sk_buff *tx_skb[CP_TX_RING_SIZE];
d03d376d
FR		 344
345 unsigned rx_buf_sz;
346 unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */
1da177e4 347
d03d376d 348 dma_addr_t ring_dma;
1da177e4
LT		 349
350 struct mii_if_info mii_if;
351};
352
353#define cpr8(reg) readb(cp->regs + (reg))
354#define cpr16(reg) readw(cp->regs + (reg))
355#define cpr32(reg) readl(cp->regs + (reg))
356#define cpw8(reg,val) writeb((val), cp->regs + (reg))
357#define cpw16(reg,val) writew((val), cp->regs + (reg))
358#define cpw32(reg,val) writel((val), cp->regs + (reg))
359#define cpw8_f(reg,val) do { \
360 writeb((val), cp->regs + (reg)); \
361 readb(cp->regs + (reg)); \
362 } while (0)
363#define cpw16_f(reg,val) do { \
364 writew((val), cp->regs + (reg)); \
365 readw(cp->regs + (reg)); \
366 } while (0)
367#define cpw32_f(reg,val) do { \
368 writel((val), cp->regs + (reg)); \
369 readl(cp->regs + (reg)); \
370 } while (0)
371
372
373static void __cp_set_rx_mode (struct net_device *dev);
374static void cp_tx (struct cp_private *cp);
375static void cp_clean_rings (struct cp_private *cp);
7502cd10
SK		 376#ifdef CONFIG_NET_POLL_CONTROLLER
377static void cp_poll_controller(struct net_device *dev);
378#endif
722fdb33
PC		 379static int cp_get_eeprom_len(struct net_device *dev);
380static int cp_get_eeprom(struct net_device *dev,
381 struct ethtool_eeprom *eeprom, u8 *data);
382static int cp_set_eeprom(struct net_device *dev,
383 struct ethtool_eeprom *eeprom, u8 *data);
1da177e4 384
1da177e4
LT		 385static struct {
386 const char str[ETH_GSTRING_LEN];
387} ethtool_stats_keys[] = {
388 { "tx_ok" },
389 { "rx_ok" },
390 { "tx_err" },
391 { "rx_err" },
392 { "rx_fifo" },
393 { "frame_align" },
394 { "tx_ok_1col" },
395 { "tx_ok_mcol" },
396 { "rx_ok_phys" },
397 { "rx_ok_bcast" },
398 { "rx_ok_mcast" },
399 { "tx_abort" },
400 { "tx_underrun" },
401 { "rx_frags" },
402};
403
404
1da177e4
LT		 405static inline void cp_set_rxbufsize (struct cp_private *cp)
406{
407 unsigned int mtu = cp->dev->mtu;
f3b197ac 408
1da177e4
LT		 409 if (mtu > ETH_DATA_LEN)
410 /* MTU + ethernet header + FCS + optional VLAN tag */
411 cp->rx_buf_sz = mtu + ETH_HLEN + 8;
412 else
413 cp->rx_buf_sz = PKT_BUF_SZ;
414}
415
416static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb,
417 struct cp_desc *desc)
418{
6864ddb2 419 u32 opts2 = le32_to_cpu(desc->opts2);
420
1da177e4
LT		 421 skb->protocol = eth_type_trans (skb, cp->dev);
422
237225f7
PZ		 423 cp->dev->stats.rx_packets++;
424 cp->dev->stats.rx_bytes += skb->len;
1da177e4 425
6864ddb2 426 if (opts2 & RxVlanTagged)
86a9bad3 427 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), swab16(opts2 & 0xffff));
6864ddb2 428
429 napi_gro_receive(&cp->napi, skb);
1da177e4
LT		 430}
431
432static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail,
433 u32 status, u32 len)
434{
b4f18b3f
JP		 435 netif_dbg(cp, rx_err, cp->dev, "rx err, slot %d status 0x%x len %d\n",
436 rx_tail, status, len);
237225f7 437 cp->dev->stats.rx_errors++;
1da177e4 438 if (status & RxErrFrame)
237225f7 439 cp->dev->stats.rx_frame_errors++;
1da177e4 440 if (status & RxErrCRC)
237225f7 441 cp->dev->stats.rx_crc_errors++;
1da177e4 442 if ((status & RxErrRunt) || (status & RxErrLong))
237225f7 443 cp->dev->stats.rx_length_errors++;
1da177e4 444 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag))
237225f7 445 cp->dev->stats.rx_length_errors++;
1da177e4 446 if (status & RxErrFIFO)
237225f7 447 cp->dev->stats.rx_fifo_errors++;
1da177e4
LT		 448}
449
450static inline unsigned int cp_rx_csum_ok (u32 status)
451{
452 unsigned int protocol = (status >> 16) & 0x3;
f3b197ac 453
24b7ea9f
SW		 454 if (((protocol == RxProtoTCP) && !(status & TCPFail)) ||
455 ((protocol == RxProtoUDP) && !(status & UDPFail)))
1da177e4 456 return 1;
24b7ea9f
SW		 457 else
458 return 0;
1da177e4
LT		 459}
460
bea3348e 461static int cp_rx_poll(struct napi_struct *napi, int budget)
1da177e4 462{
bea3348e
SH		 463 struct cp_private *cp = container_of(napi, struct cp_private, napi);
464 struct net_device *dev = cp->dev;
465 unsigned int rx_tail = cp->rx_tail;
466 int rx;
1da177e4
LT		 467
468rx_status_loop:
469 rx = 0;
470 cpw16(IntrStatus, cp_rx_intr_mask);
471
50ff44be 472 while (rx < budget) {
1da177e4 473 u32 status, len;
cf3c4c03 474 dma_addr_t mapping, new_mapping;
1da177e4
LT		 475 struct sk_buff *skb, *new_skb;
476 struct cp_desc *desc;
839d1624 477 const unsigned buflen = cp->rx_buf_sz;
1da177e4 478
0ba894d4 479 skb = cp->rx_skb[rx_tail];
5d9428de 480 BUG_ON(!skb);
1da177e4
LT		 481
482 desc = &cp->rx_ring[rx_tail];
483 status = le32_to_cpu(desc->opts1);
484 if (status & DescOwn)
485 break;
486
487 len = (status & 0x1fff) - 4;
3598b57b 488 mapping = le64_to_cpu(desc->addr);
1da177e4
LT		 489
490 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag)) {
491 /* we don't support incoming fragmented frames.
492 * instead, we attempt to ensure that the
493 * pre-allocated RX skbs are properly sized such
494 * that RX fragments are never encountered
495 */
496 cp_rx_err_acct(cp, rx_tail, status, len);
237225f7 497 dev->stats.rx_dropped++;
1da177e4
LT		 498 cp->cp_stats.rx_frags++;
499 goto rx_next;
500 }
501
502 if (status & (RxError | RxErrFIFO)) {
503 cp_rx_err_acct(cp, rx_tail, status, len);
504 goto rx_next;
505 }
506
b4f18b3f
JP		 507 netif_dbg(cp, rx_status, dev, "rx slot %d status 0x%x len %d\n",
508 rx_tail, status, len);
1da177e4 509
e2338f86 510 new_skb = napi_alloc_skb(napi, buflen);
1da177e4 511 if (!new_skb) {
237225f7 512 dev->stats.rx_dropped++;
1da177e4
LT		 513 goto rx_next;
514 }
515
cf3c4c03
NH		 516 new_mapping = dma_map_single(&cp->pdev->dev, new_skb->data, buflen,
517 PCI_DMA_FROMDEVICE);
518 if (dma_mapping_error(&cp->pdev->dev, new_mapping)) {
519 dev->stats.rx_dropped++;
d06f5187 520 kfree_skb(new_skb);
cf3c4c03
NH		 521 goto rx_next;
522 }
523
6cc92cdd 524 dma_unmap_single(&cp->pdev->dev, mapping,
1da177e4
LT		 525 buflen, PCI_DMA_FROMDEVICE);
526
527 /* Handle checksum offloading for incoming packets. */
528 if (cp_rx_csum_ok(status))
529 skb->ip_summed = CHECKSUM_UNNECESSARY;
530 else
bc8acf2c 531 skb_checksum_none_assert(skb);
1da177e4
LT		 532
533 skb_put(skb, len);
534
0ba894d4 535 cp->rx_skb[rx_tail] = new_skb;
1da177e4
LT		 536
537 cp_rx_skb(cp, skb, desc);
538 rx++;
cf3c4c03 539 mapping = new_mapping;
1da177e4
LT		 540
541rx_next:
542 cp->rx_ring[rx_tail].opts2 = 0;
543 cp->rx_ring[rx_tail].addr = cpu_to_le64(mapping);
544 if (rx_tail == (CP_RX_RING_SIZE - 1))
545 desc->opts1 = cpu_to_le32(DescOwn | RingEnd |
546 cp->rx_buf_sz);
547 else
548 desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
549 rx_tail = NEXT_RX(rx_tail);
1da177e4
LT		 550 }
551
552 cp->rx_tail = rx_tail;
553
1da177e4
LT		 554 /* if we did not reach work limit, then we're done with
555 * this round of polling
556 */
bea3348e 557 if (rx < budget) {
d15e9c4d
FR		 558 unsigned long flags;
559
1da177e4
LT		 560 if (cpr16(IntrStatus) & cp_rx_intr_mask)
561 goto rx_status_loop;
562
2e71a6f8 563 napi_gro_flush(napi, false);
bea3348e 564 spin_lock_irqsave(&cp->lock, flags);
288379f0 565 __napi_complete(napi);
349124a0 566 cpw16_f(IntrMask, cp_intr_mask);
bea3348e 567 spin_unlock_irqrestore(&cp->lock, flags);
1da177e4
LT		 568 }
569
bea3348e 570 return rx;
1da177e4
LT		 571}
572
7d12e780 573static irqreturn_t cp_interrupt (int irq, void *dev_instance)
1da177e4
LT		 574{
575 struct net_device *dev = dev_instance;
576 struct cp_private *cp;
83c34fd0 577 int handled = 0;
1da177e4
LT		 578 u16 status;
579
580 if (unlikely(dev == NULL))
581 return IRQ_NONE;
582 cp = netdev_priv(dev);
583
83c34fd0
JG		 584 spin_lock(&cp->lock);
585
1da177e4
LT		 586 status = cpr16(IntrStatus);
587 if (!status || (status == 0xFFFF))
83c34fd0
JG		 588 goto out_unlock;
589
590 handled = 1;
1da177e4 591
b4f18b3f
JP		 592 netif_dbg(cp, intr, dev, "intr, status %04x cmd %02x cpcmd %04x\n",
593 status, cpr8(Cmd), cpr16(CpCmd));
1da177e4
LT		 594
595 cpw16(IntrStatus, status & ~cp_rx_intr_mask);
596
1da177e4
LT		 597 /* close possible race's with dev_close */
598 if (unlikely(!netif_running(dev))) {
599 cpw16(IntrMask, 0);
83c34fd0 600 goto out_unlock;
1da177e4
LT		 601 }
602
603 if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
288379f0 604 if (napi_schedule_prep(&cp->napi)) {
1da177e4 605 cpw16_f(IntrMask, cp_norx_intr_mask);
288379f0 606 __napi_schedule(&cp->napi);
1da177e4
LT		 607 }
608
609 if (status & (TxOK | TxErr | TxEmpty | SWInt))
610 cp_tx(cp);
611 if (status & LinkChg)
2501f843 612 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
1da177e4 613
1da177e4
LT		 614
615 if (status & PciErr) {
616 u16 pci_status;
617
618 pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
619 pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
b4f18b3f
JP		 620 netdev_err(dev, "PCI bus error, status=%04x, PCI status=%04x\n",
621 status, pci_status);
1da177e4
LT		 622
623 /* TODO: reset hardware */
624 }
625
83c34fd0
JG		 626out_unlock:
627 spin_unlock(&cp->lock);
628
629 return IRQ_RETVAL(handled);
1da177e4
LT		 630}
631
7502cd10
SK		 632#ifdef CONFIG_NET_POLL_CONTROLLER
633/*
634 * Polling receive - used by netconsole and other diagnostic tools
635 * to allow network i/o with interrupts disabled.
636 */
637static void cp_poll_controller(struct net_device *dev)
638{
a69afe32
FR		 639 struct cp_private *cp = netdev_priv(dev);
640 const int irq = cp->pdev->irq;
641
642 disable_irq(irq);
643 cp_interrupt(irq, dev);
644 enable_irq(irq);
7502cd10
SK		 645}
646#endif
647
1da177e4
LT		 648static void cp_tx (struct cp_private *cp)
649{
650 unsigned tx_head = cp->tx_head;
651 unsigned tx_tail = cp->tx_tail;
871f0d4c 652 unsigned bytes_compl = 0, pkts_compl = 0;
1da177e4
LT		 653
654 while (tx_tail != tx_head) {
3598b57b 655 struct cp_desc *txd = cp->tx_ring + tx_tail;
1da177e4
LT		 656 struct sk_buff *skb;
657 u32 status;
658
659 rmb();
3598b57b 660 status = le32_to_cpu(txd->opts1);
1da177e4
LT		 661 if (status & DescOwn)
662 break;
663
48907e39 664 skb = cp->tx_skb[tx_tail];
5d9428de 665 BUG_ON(!skb);
1da177e4 666
6cc92cdd 667 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
48907e39
FR		 668 le32_to_cpu(txd->opts1) & 0xffff,
669 PCI_DMA_TODEVICE);
1da177e4
LT		 670
671 if (status & LastFrag) {
672 if (status & (TxError | TxFIFOUnder)) {
b4f18b3f
JP		 673 netif_dbg(cp, tx_err, cp->dev,
674 "tx err, status 0x%x\n", status);
237225f7 675 cp->dev->stats.tx_errors++;
1da177e4 676 if (status & TxOWC)
237225f7 677 cp->dev->stats.tx_window_errors++;
1da177e4 678 if (status & TxMaxCol)
237225f7 679 cp->dev->stats.tx_aborted_errors++;
1da177e4 680 if (status & TxLinkFail)
237225f7 681 cp->dev->stats.tx_carrier_errors++;
1da177e4 682 if (status & TxFIFOUnder)
237225f7 683 cp->dev->stats.tx_fifo_errors++;
1da177e4 684 } else {
237225f7 685 cp->dev->stats.collisions +=
1da177e4 686 ((status >> TxColCntShift) & TxColCntMask);
237225f7
PZ		 687 cp->dev->stats.tx_packets++;
688 cp->dev->stats.tx_bytes += skb->len;
b4f18b3f
JP		 689 netif_dbg(cp, tx_done, cp->dev,
690 "tx done, slot %d\n", tx_tail);
1da177e4 691 }
7fe0ee09
YY		 692 bytes_compl += skb->len;
693 pkts_compl++;
1da177e4
LT		 694 dev_kfree_skb_irq(skb);
695 }
696
48907e39 697 cp->tx_skb[tx_tail] = NULL;
1da177e4
LT		 698
699 tx_tail = NEXT_TX(tx_tail);
700 }
701
702 cp->tx_tail = tx_tail;
703
871f0d4c 704 netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
1da177e4
LT		 705 if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
706 netif_wake_queue(cp->dev);
707}
708
6864ddb2 709static inline u32 cp_tx_vlan_tag(struct sk_buff *skb)
710{
df8a39de
JP		 711 return skb_vlan_tag_present(skb) ?
712 TxVlanTag | swab16(skb_vlan_tag_get(skb)) : 0x00;
6864ddb2 713}
714
cf3c4c03
NH		 715static void unwind_tx_frag_mapping(struct cp_private *cp, struct sk_buff *skb,
716 int first, int entry_last)
717{
718 int frag, index;
719 struct cp_desc *txd;
720 skb_frag_t *this_frag;
721 for (frag = 0; frag+first < entry_last; frag++) {
722 index = first+frag;
723 cp->tx_skb[index] = NULL;
724 txd = &cp->tx_ring[index];
725 this_frag = &skb_shinfo(skb)->frags[frag];
726 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
727 skb_frag_size(this_frag), PCI_DMA_TODEVICE);
728 }
729}
730
61357325
SH		 731static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
732 struct net_device *dev)
1da177e4
LT		 733{
734 struct cp_private *cp = netdev_priv(dev);
735 unsigned entry;
fcec3456 736 u32 eor, flags;
553af567 737 unsigned long intr_flags;
6864ddb2 738 __le32 opts2;
fcec3456 739 int mss = 0;
1da177e4 740
553af567 741 spin_lock_irqsave(&cp->lock, intr_flags);
1da177e4
LT		 742
743 /* This is a hard error, log it. */
744 if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) {
745 netif_stop_queue(dev);
553af567 746 spin_unlock_irqrestore(&cp->lock, intr_flags);
b4f18b3f 747 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
5b548140 748 return NETDEV_TX_BUSY;
1da177e4
LT		 749 }
750
1da177e4
LT		 751 entry = cp->tx_head;
752 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
044a890c 753 mss = skb_shinfo(skb)->gso_size;
fcec3456 754
6864ddb2 755 opts2 = cpu_to_le32(cp_tx_vlan_tag(skb));
756
1da177e4
LT		 757 if (skb_shinfo(skb)->nr_frags == 0) {
758 struct cp_desc *txd = &cp->tx_ring[entry];
759 u32 len;
760 dma_addr_t mapping;
761
762 len = skb->len;
6cc92cdd 763 mapping = dma_map_single(&cp->pdev->dev, skb->data, len, PCI_DMA_TODEVICE);
cf3c4c03
NH		 764 if (dma_mapping_error(&cp->pdev->dev, mapping))
765 goto out_dma_error;
766
6864ddb2 767 txd->opts2 = opts2;
1da177e4
LT		 768 txd->addr = cpu_to_le64(mapping);
769 wmb();
770
fcec3456
JG		 771 flags = eor | len | DescOwn | FirstFrag | LastFrag;
772
773 if (mss)
774 flags |= LargeSend | ((mss & MSSMask) << MSSShift);
84fa7933 775 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
eddc9ec5 776 const struct iphdr *ip = ip_hdr(skb);
1da177e4 777 if (ip->protocol == IPPROTO_TCP)
fcec3456 778 flags |= IPCS | TCPCS;
1da177e4 779 else if (ip->protocol == IPPROTO_UDP)
fcec3456 780 flags |= IPCS | UDPCS;
1da177e4 781 else
5734418d 782 WARN_ON(1); /* we need a WARN() */
fcec3456
JG		 783 }
784
785 txd->opts1 = cpu_to_le32(flags);
1da177e4
LT		 786 wmb();
787
48907e39 788 cp->tx_skb[entry] = skb;
1da177e4
LT		 789 entry = NEXT_TX(entry);
790 } else {
791 struct cp_desc *txd;
792 u32 first_len, first_eor;
793 dma_addr_t first_mapping;
794 int frag, first_entry = entry;
eddc9ec5 795 const struct iphdr *ip = ip_hdr(skb);
1da177e4
LT		 796
797 /* We must give this initial chunk to the device last.
798 * Otherwise we could race with the device.
799 */
800 first_eor = eor;
801 first_len = skb_headlen(skb);
6cc92cdd 802 first_mapping = dma_map_single(&cp->pdev->dev, skb->data,
1da177e4 803 first_len, PCI_DMA_TODEVICE);
cf3c4c03
NH		 804 if (dma_mapping_error(&cp->pdev->dev, first_mapping))
805 goto out_dma_error;
806
48907e39 807 cp->tx_skb[entry] = skb;
1da177e4
LT		 808 entry = NEXT_TX(entry);
809
810 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
9e903e08 811 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
1da177e4
LT		 812 u32 len;
813 u32 ctrl;
814 dma_addr_t mapping;
815
9e903e08 816 len = skb_frag_size(this_frag);
6cc92cdd 817 mapping = dma_map_single(&cp->pdev->dev,
deb8a069 818 skb_frag_address(this_frag),
1da177e4 819 len, PCI_DMA_TODEVICE);
cf3c4c03
NH		 820 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
821 unwind_tx_frag_mapping(cp, skb, first_entry, entry);
822 goto out_dma_error;
823 }
824
1da177e4
LT		 825 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
826
fcec3456
JG		 827 ctrl = eor | len | DescOwn;
828
829 if (mss)
830 ctrl |= LargeSend |
831 ((mss & MSSMask) << MSSShift);
84fa7933 832 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
1da177e4 833 if (ip->protocol == IPPROTO_TCP)
fcec3456 834 ctrl |= IPCS | TCPCS;
1da177e4 835 else if (ip->protocol == IPPROTO_UDP)
fcec3456 836 ctrl |= IPCS | UDPCS;
1da177e4
LT		 837 else
838 BUG();
fcec3456 839 }
1da177e4
LT		 840
841 if (frag == skb_shinfo(skb)->nr_frags - 1)
842 ctrl |= LastFrag;
843
844 txd = &cp->tx_ring[entry];
6864ddb2 845 txd->opts2 = opts2;
1da177e4
LT		 846 txd->addr = cpu_to_le64(mapping);
847 wmb();
848
849 txd->opts1 = cpu_to_le32(ctrl);
850 wmb();
851
48907e39 852 cp->tx_skb[entry] = skb;
1da177e4
LT		 853 entry = NEXT_TX(entry);
854 }
855
856 txd = &cp->tx_ring[first_entry];
6864ddb2 857 txd->opts2 = opts2;
1da177e4
LT		 858 txd->addr = cpu_to_le64(first_mapping);
859 wmb();
860
84fa7933 861 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1da177e4
LT		 862 if (ip->protocol == IPPROTO_TCP)
863 txd->opts1 = cpu_to_le32(first_eor | first_len |
864 FirstFrag | DescOwn |
865 IPCS | TCPCS);
866 else if (ip->protocol == IPPROTO_UDP)
867 txd->opts1 = cpu_to_le32(first_eor | first_len |
868 FirstFrag | DescOwn |
869 IPCS | UDPCS);
870 else
871 BUG();
872 } else
873 txd->opts1 = cpu_to_le32(first_eor | first_len |
874 FirstFrag | DescOwn);
875 wmb();
876 }
877 cp->tx_head = entry;
871f0d4c
DW		 878
879 netdev_sent_queue(dev, skb->len);
b4f18b3f
JP		 880 netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
881 entry, skb->len);
1da177e4
LT		 882 if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
883 netif_stop_queue(dev);
884
cf3c4c03 885out_unlock:
553af567 886 spin_unlock_irqrestore(&cp->lock, intr_flags);
1da177e4
LT		 887
888 cpw8(TxPoll, NormalTxPoll);
1da177e4 889
6ed10654 890 return NETDEV_TX_OK;
cf3c4c03 891out_dma_error:
508f81d5 892 dev_kfree_skb_any(skb);
cf3c4c03
NH		 893 cp->dev->stats.tx_dropped++;
894 goto out_unlock;
1da177e4
LT		 895}
896
897/* Set or clear the multicast filter for this adaptor.
898 This routine is not state sensitive and need not be SMP locked. */
899
900static void __cp_set_rx_mode (struct net_device *dev)
901{
902 struct cp_private *cp = netdev_priv(dev);
903 u32 mc_filter[2]; /* Multicast hash filter */
a56ed41d 904 int rx_mode;
1da177e4
LT		 905
906 /* Note: do not reorder, GCC is clever about common statements. */
907 if (dev->flags & IFF_PROMISC) {
908 /* Unconditionally log net taps. */
1da177e4
LT		 909 rx_mode =
910 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
911 AcceptAllPhys;
912 mc_filter[1] = mc_filter[0] = 0xffffffff;
a56ed41d 913 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
8e95a202 914 (dev->flags & IFF_ALLMULTI)) {
1da177e4
LT		 915 /* Too many to filter perfectly -- accept all multicasts. */
916 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
917 mc_filter[1] = mc_filter[0] = 0xffffffff;
918 } else {
22bedad3 919 struct netdev_hw_addr *ha;
1da177e4
LT		 920 rx_mode = AcceptBroadcast | AcceptMyPhys;
921 mc_filter[1] = mc_filter[0] = 0;
22bedad3
JP		 922 netdev_for_each_mc_addr(ha, dev) {
923 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
1da177e4
LT		 924
925 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
926 rx_mode |= AcceptMulticast;
927 }
928 }
929
930 /* We can safely update without stopping the chip. */
f872b237
JW		 931 cp->rx_config = cp_rx_config | rx_mode;
932 cpw32_f(RxConfig, cp->rx_config);
933
1da177e4
LT		 934 cpw32_f (MAR0 + 0, mc_filter[0]);
935 cpw32_f (MAR0 + 4, mc_filter[1]);
936}
937
938static void cp_set_rx_mode (struct net_device *dev)
939{
940 unsigned long flags;
941 struct cp_private *cp = netdev_priv(dev);
942
943 spin_lock_irqsave (&cp->lock, flags);
944 __cp_set_rx_mode(dev);
945 spin_unlock_irqrestore (&cp->lock, flags);
946}
947
948static void __cp_get_stats(struct cp_private *cp)
949{
950 /* only lower 24 bits valid; write any value to clear */
237225f7 951 cp->dev->stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff);
1da177e4
LT		 952 cpw32 (RxMissed, 0);
953}
954
955static struct net_device_stats *cp_get_stats(struct net_device *dev)
956{
957 struct cp_private *cp = netdev_priv(dev);
958 unsigned long flags;
959
960 /* The chip only need report frame silently dropped. */
961 spin_lock_irqsave(&cp->lock, flags);
962 if (netif_running(dev) && netif_device_present(dev))
963 __cp_get_stats(cp);
964 spin_unlock_irqrestore(&cp->lock, flags);
965
237225f7 966 return &dev->stats;
1da177e4
LT		 967}
968
969static void cp_stop_hw (struct cp_private *cp)
970{
971 cpw16(IntrStatus, ~(cpr16(IntrStatus)));
972 cpw16_f(IntrMask, 0);
973 cpw8(Cmd, 0);
974 cpw16_f(CpCmd, 0);
975 cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));
976
977 cp->rx_tail = 0;
978 cp->tx_head = cp->tx_tail = 0;
871f0d4c
DW		 979
980 netdev_reset_queue(cp->dev);
1da177e4
LT		 981}
982
983static void cp_reset_hw (struct cp_private *cp)
984{
985 unsigned work = 1000;
986
987 cpw8(Cmd, CmdReset);
988
989 while (work--) {
990 if (!(cpr8(Cmd) & CmdReset))
991 return;
992
3173c890 993 schedule_timeout_uninterruptible(10);
1da177e4
LT		 994 }
995
b4f18b3f 996 netdev_err(cp->dev, "hardware reset timeout\n");
1da177e4
LT		 997}
998
999static inline void cp_start_hw (struct cp_private *cp)
1000{
a9dbe40f
DW		 1001 dma_addr_t ring_dma;
1002
1da177e4 1003 cpw16(CpCmd, cp->cpcmd);
a9dbe40f
DW		 1004
1005 /*
1006 * These (at least TxRingAddr) need to be configured after the
1007 * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
1008 * (C+ Command Register) recommends that these and more be configured
1009 * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
1010 * it's been observed that the TxRingAddr is actually reset to garbage
1011 * when C+ mode Tx is enabled in CpCmd.
1012 */
1013 cpw32_f(HiTxRingAddr, 0);
1014 cpw32_f(HiTxRingAddr + 4, 0);
1015
1016 ring_dma = cp->ring_dma;
1017 cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
1018 cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
1019
1020 ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
1021 cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
1022 cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
1023
1024 /*
1025 * Strictly speaking, the datasheet says this should be enabled
1026 * *before* setting the descriptor addresses. But what, then, would
1027 * prevent it from doing DMA to random unconfigured addresses?
1028 * This variant appears to work fine.
1029 */
1da177e4 1030 cpw8(Cmd, RxOn | TxOn);
871f0d4c
DW		 1031
1032 netdev_reset_queue(cp->dev);
1da177e4
LT		 1033}
1034
a8c9cb10
JW		 1035static void cp_enable_irq(struct cp_private *cp)
1036{
1037 cpw16_f(IntrMask, cp_intr_mask);
1038}
1039
1da177e4
LT		 1040static void cp_init_hw (struct cp_private *cp)
1041{
1042 struct net_device *dev = cp->dev;
1da177e4
LT		 1043
1044 cp_reset_hw(cp);
1045
1046 cpw8_f (Cfg9346, Cfg9346_Unlock);
1047
1048 /* Restore our idea of the MAC address. */
03233b90
AV		 1049 cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1050 cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1da177e4
LT		 1051
1052 cp_start_hw(cp);
1053 cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
1054
1055 __cp_set_rx_mode(dev);
1056 cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift));
1057
1058 cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable);
1059 /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */
1060 cpw8(Config3, PARMEnable);
1061 cp->wol_enabled = 0;
1062
f3b197ac 1063 cpw8(Config5, cpr8(Config5) & PMEStatus);
1da177e4 1064
1da177e4
LT		 1065 cpw16(MultiIntr, 0);
1066
1da177e4
LT		 1067 cpw8_f(Cfg9346, Cfg9346_Lock);
1068}
1069
a52be1cb 1070static int cp_refill_rx(struct cp_private *cp)
1da177e4 1071{
a52be1cb 1072 struct net_device *dev = cp->dev;
1da177e4
LT		 1073 unsigned i;
1074
1075 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1076 struct sk_buff *skb;
3598b57b 1077 dma_addr_t mapping;
1da177e4 1078
89d71a66 1079 skb = netdev_alloc_skb_ip_align(dev, cp->rx_buf_sz);
1da177e4
LT		 1080 if (!skb)
1081 goto err_out;
1082
6cc92cdd
JG		 1083 mapping = dma_map_single(&cp->pdev->dev, skb->data,
1084 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
cf3c4c03
NH		 1085 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
1086 kfree_skb(skb);
1087 goto err_out;
1088 }
0ba894d4 1089 cp->rx_skb[i] = skb;
1da177e4
LT		 1090
1091 cp->rx_ring[i].opts2 = 0;
3598b57b 1092 cp->rx_ring[i].addr = cpu_to_le64(mapping);
1da177e4
LT		 1093 if (i == (CP_RX_RING_SIZE - 1))
1094 cp->rx_ring[i].opts1 =
1095 cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz);
1096 else
1097 cp->rx_ring[i].opts1 =
1098 cpu_to_le32(DescOwn | cp->rx_buf_sz);
1099 }
1100
1101 return 0;
1102
1103err_out:
1104 cp_clean_rings(cp);
1105 return -ENOMEM;
1106}
1107
576cfa93
FR		 1108static void cp_init_rings_index (struct cp_private *cp)
1109{
1110 cp->rx_tail = 0;
1111 cp->tx_head = cp->tx_tail = 0;
1112}
1113
1da177e4
LT		 1114static int cp_init_rings (struct cp_private *cp)
1115{
1116 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1117 cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
1118
576cfa93 1119 cp_init_rings_index(cp);
1da177e4
LT		 1120
1121 return cp_refill_rx (cp);
1122}
1123
1124static int cp_alloc_rings (struct cp_private *cp)
1125{
892a925e 1126 struct device *d = &cp->pdev->dev;
1da177e4 1127 void *mem;
892a925e 1128 int rc;
1da177e4 1129
892a925e 1130 mem = dma_alloc_coherent(d, CP_RING_BYTES, &cp->ring_dma, GFP_KERNEL);
1da177e4
LT		 1131 if (!mem)
1132 return -ENOMEM;
1133
1134 cp->rx_ring = mem;
1135 cp->tx_ring = &cp->rx_ring[CP_RX_RING_SIZE];
1136
892a925e 1137 rc = cp_init_rings(cp);
1138 if (rc < 0)
1139 dma_free_coherent(d, CP_RING_BYTES, cp->rx_ring, cp->ring_dma);
1140
1141 return rc;
1da177e4
LT		 1142}
1143
1144static void cp_clean_rings (struct cp_private *cp)
1145{
3598b57b 1146 struct cp_desc *desc;
1da177e4
LT		 1147 unsigned i;
1148
1da177e4 1149 for (i = 0; i < CP_RX_RING_SIZE; i++) {
0ba894d4 1150 if (cp->rx_skb[i]) {
3598b57b 1151 desc = cp->rx_ring + i;
6cc92cdd 1152 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1da177e4 1153 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
0ba894d4 1154 dev_kfree_skb(cp->rx_skb[i]);
1da177e4
LT		 1155 }
1156 }
1157
1158 for (i = 0; i < CP_TX_RING_SIZE; i++) {
48907e39
FR		 1159 if (cp->tx_skb[i]) {
1160 struct sk_buff *skb = cp->tx_skb[i];
5734418d 1161
3598b57b 1162 desc = cp->tx_ring + i;
6cc92cdd 1163 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
48907e39
FR		 1164 le32_to_cpu(desc->opts1) & 0xffff,
1165 PCI_DMA_TODEVICE);
3598b57b 1166 if (le32_to_cpu(desc->opts1) & LastFrag)
5734418d 1167 dev_kfree_skb(skb);
237225f7 1168 cp->dev->stats.tx_dropped++;
1da177e4
LT		 1169 }
1170 }
98962baa 1171 netdev_reset_queue(cp->dev);
1da177e4 1172
5734418d
FR		 1173 memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
1174 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1175
0ba894d4 1176 memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE);
48907e39 1177 memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE);
1da177e4
LT		 1178}
1179
1180static void cp_free_rings (struct cp_private *cp)
1181{
1182 cp_clean_rings(cp);
6cc92cdd
JG		 1183 dma_free_coherent(&cp->pdev->dev, CP_RING_BYTES, cp->rx_ring,
1184 cp->ring_dma);
1da177e4
LT		 1185 cp->rx_ring = NULL;
1186 cp->tx_ring = NULL;
1da177e4
LT		 1187}
1188
1189static int cp_open (struct net_device *dev)
1190{
1191 struct cp_private *cp = netdev_priv(dev);
a69afe32 1192 const int irq = cp->pdev->irq;
1da177e4
LT		 1193 int rc;
1194
b4f18b3f 1195 netif_dbg(cp, ifup, dev, "enabling interface\n");
1da177e4
LT		 1196
1197 rc = cp_alloc_rings(cp);
1198 if (rc)
1199 return rc;
1200
bea3348e
SH		 1201 napi_enable(&cp->napi);
1202
1da177e4
LT		 1203 cp_init_hw(cp);
1204
a69afe32 1205 rc = request_irq(irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
1da177e4
LT		 1206 if (rc)
1207 goto err_out_hw;
1208
a8c9cb10
JW		 1209 cp_enable_irq(cp);
1210
1da177e4 1211 netif_carrier_off(dev);
2501f843 1212 mii_check_media(&cp->mii_if, netif_msg_link(cp), true);
1da177e4
LT		 1213 netif_start_queue(dev);
1214
1215 return 0;
1216
1217err_out_hw:
bea3348e 1218 napi_disable(&cp->napi);
1da177e4
LT		 1219 cp_stop_hw(cp);
1220 cp_free_rings(cp);
1221 return rc;
1222}
1223
1224static int cp_close (struct net_device *dev)
1225{
1226 struct cp_private *cp = netdev_priv(dev);
1227 unsigned long flags;
1228
bea3348e
SH		 1229 napi_disable(&cp->napi);
1230
b4f18b3f 1231 netif_dbg(cp, ifdown, dev, "disabling interface\n");
1da177e4
LT		 1232
1233 spin_lock_irqsave(&cp->lock, flags);
1234
1235 netif_stop_queue(dev);
1236 netif_carrier_off(dev);
1237
1238 cp_stop_hw(cp);
1239
1240 spin_unlock_irqrestore(&cp->lock, flags);
1241
a69afe32 1242 free_irq(cp->pdev->irq, dev);
1da177e4
LT		 1243
1244 cp_free_rings(cp);
1245 return 0;
1246}
1247
9030c0d2
FR		 1248static void cp_tx_timeout(struct net_device *dev)
1249{
1250 struct cp_private *cp = netdev_priv(dev);
1251 unsigned long flags;
1252 int rc;
1253
b4f18b3f
JP		 1254 netdev_warn(dev, "Transmit timeout, status %2x %4x %4x %4x\n",
1255 cpr8(Cmd), cpr16(CpCmd),
1256 cpr16(IntrStatus), cpr16(IntrMask));
9030c0d2
FR		 1257
1258 spin_lock_irqsave(&cp->lock, flags);
1259
1260 cp_stop_hw(cp);
1261 cp_clean_rings(cp);
1262 rc = cp_init_rings(cp);
1263 cp_start_hw(cp);
01ffc0a7 1264 cp_enable_irq(cp);
9030c0d2
FR		 1265
1266 netif_wake_queue(dev);
1267
1268 spin_unlock_irqrestore(&cp->lock, flags);
9030c0d2
FR		 1269}
1270
1da177e4
LT		 1271static int cp_change_mtu(struct net_device *dev, int new_mtu)
1272{
1273 struct cp_private *cp = netdev_priv(dev);
1da177e4
LT		 1274
1275 /* check for invalid MTU, according to hardware limits */
1276 if (new_mtu < CP_MIN_MTU || new_mtu > CP_MAX_MTU)
1277 return -EINVAL;
1278
1279 /* if network interface not up, no need for complexity */
1280 if (!netif_running(dev)) {
1281 dev->mtu = new_mtu;
1282 cp_set_rxbufsize(cp); /* set new rx buf size */
1283 return 0;
1284 }
1285
cb64edb6
JG		 1286 /* network IS up, close it, reset MTU, and come up again. */
1287 cp_close(dev);
1da177e4 1288 dev->mtu = new_mtu;
cb64edb6
JG		 1289 cp_set_rxbufsize(cp);
1290 return cp_open(dev);
1da177e4 1291}
1da177e4 1292
f71e1309 1293static const char mii_2_8139_map[8] = {
1da177e4
LT		 1294 BasicModeCtrl,
1295 BasicModeStatus,
1296 0,
1297 0,
1298 NWayAdvert,
1299 NWayLPAR,
1300 NWayExpansion,
1301 0
1302};
1303
1304static int mdio_read(struct net_device *dev, int phy_id, int location)
1305{
1306 struct cp_private *cp = netdev_priv(dev);
1307
1308 return location < 8 && mii_2_8139_map[location] ?
1309 readw(cp->regs + mii_2_8139_map[location]) : 0;
1310}
1311
1312
1313static void mdio_write(struct net_device *dev, int phy_id, int location,
1314 int value)
1315{
1316 struct cp_private *cp = netdev_priv(dev);
1317
1318 if (location == 0) {
1319 cpw8(Cfg9346, Cfg9346_Unlock);
1320 cpw16(BasicModeCtrl, value);
1321 cpw8(Cfg9346, Cfg9346_Lock);
1322 } else if (location < 8 && mii_2_8139_map[location])
1323 cpw16(mii_2_8139_map[location], value);
1324}
1325
1326/* Set the ethtool Wake-on-LAN settings */
1327static int netdev_set_wol (struct cp_private *cp,
1328 const struct ethtool_wolinfo *wol)
1329{
1330 u8 options;
1331
1332 options = cpr8 (Config3) & ~(LinkUp | MagicPacket);
1333 /* If WOL is being disabled, no need for complexity */
1334 if (wol->wolopts) {
1335 if (wol->wolopts & WAKE_PHY) options |= LinkUp;
1336 if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket;
1337 }
1338
1339 cpw8 (Cfg9346, Cfg9346_Unlock);
1340 cpw8 (Config3, options);
1341 cpw8 (Cfg9346, Cfg9346_Lock);
1342
1343 options = 0; /* Paranoia setting */
1344 options = cpr8 (Config5) & ~(UWF | MWF | BWF);
1345 /* If WOL is being disabled, no need for complexity */
1346 if (wol->wolopts) {
1347 if (wol->wolopts & WAKE_UCAST) options |= UWF;
1348 if (wol->wolopts & WAKE_BCAST) options |= BWF;
1349 if (wol->wolopts & WAKE_MCAST) options |= MWF;
1350 }
1351
1352 cpw8 (Config5, options);
1353
1354 cp->wol_enabled = (wol->wolopts) ? 1 : 0;
1355
1356 return 0;
1357}
1358
1359/* Get the ethtool Wake-on-LAN settings */
1360static void netdev_get_wol (struct cp_private *cp,
1361 struct ethtool_wolinfo *wol)
1362{
1363 u8 options;
1364
1365 wol->wolopts = 0; /* Start from scratch */
1366 wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC |
1367 WAKE_MCAST | WAKE_UCAST;
1368 /* We don't need to go on if WOL is disabled */
1369 if (!cp->wol_enabled) return;
f3b197ac 1370
1da177e4
LT		 1371 options = cpr8 (Config3);
1372 if (options & LinkUp) wol->wolopts |= WAKE_PHY;
1373 if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC;
1374
1375 options = 0; /* Paranoia setting */
1376 options = cpr8 (Config5);
1377 if (options & UWF) wol->wolopts |= WAKE_UCAST;
1378 if (options & BWF) wol->wolopts |= WAKE_BCAST;
1379 if (options & MWF) wol->wolopts |= WAKE_MCAST;
1380}
1381
1382static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1383{
1384 struct cp_private *cp = netdev_priv(dev);
1385
68aad78c
RJ		 1386 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1387 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1388 strlcpy(info->bus_info, pci_name(cp->pdev), sizeof(info->bus_info));
1da177e4
LT		 1389}
1390
1d0861ac
RJ		 1391static void cp_get_ringparam(struct net_device *dev,
1392 struct ethtool_ringparam *ring)
1393{
1394 ring->rx_max_pending = CP_RX_RING_SIZE;
1395 ring->tx_max_pending = CP_TX_RING_SIZE;
1396 ring->rx_pending = CP_RX_RING_SIZE;
1397 ring->tx_pending = CP_TX_RING_SIZE;
1398}
1399
1da177e4
LT		 1400static int cp_get_regs_len(struct net_device *dev)
1401{
1402 return CP_REGS_SIZE;
1403}
1404
b9f2c044 1405static int cp_get_sset_count (struct net_device *dev, int sset)
1da177e4 1406{
b9f2c044
JG		 1407 switch (sset) {
1408 case ETH_SS_STATS:
1409 return CP_NUM_STATS;
1410 default:
1411 return -EOPNOTSUPP;
1412 }
1da177e4
LT		 1413}
1414
1415static int cp_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1416{
1417 struct cp_private *cp = netdev_priv(dev);
1418 int rc;
1419 unsigned long flags;
1420
1421 spin_lock_irqsave(&cp->lock, flags);
1422 rc = mii_ethtool_gset(&cp->mii_if, cmd);
1423 spin_unlock_irqrestore(&cp->lock, flags);
1424
1425 return rc;
1426}
1427
1428static int cp_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1429{
1430 struct cp_private *cp = netdev_priv(dev);
1431 int rc;
1432 unsigned long flags;
1433
1434 spin_lock_irqsave(&cp->lock, flags);
1435 rc = mii_ethtool_sset(&cp->mii_if, cmd);
1436 spin_unlock_irqrestore(&cp->lock, flags);
1437
1438 return rc;
1439}
1440
1441static int cp_nway_reset(struct net_device *dev)
1442{
1443 struct cp_private *cp = netdev_priv(dev);
1444 return mii_nway_restart(&cp->mii_if);
1445}
1446
1447static u32 cp_get_msglevel(struct net_device *dev)
1448{
1449 struct cp_private *cp = netdev_priv(dev);
1450 return cp->msg_enable;
1451}
1452
1453static void cp_set_msglevel(struct net_device *dev, u32 value)
1454{
1455 struct cp_private *cp = netdev_priv(dev);
1456 cp->msg_enable = value;
1457}
1458
c8f44aff 1459static int cp_set_features(struct net_device *dev, netdev_features_t features)
1da177e4
LT		 1460{
1461 struct cp_private *cp = netdev_priv(dev);
044a890c 1462 unsigned long flags;
1da177e4 1463
044a890c
MM		 1464 if (!((dev->features ^ features) & NETIF_F_RXCSUM))
1465 return 0;
1da177e4 1466
044a890c 1467 spin_lock_irqsave(&cp->lock, flags);
1da177e4 1468
044a890c
MM		 1469 if (features & NETIF_F_RXCSUM)
1470 cp->cpcmd |= RxChkSum;
1da177e4 1471 else
044a890c 1472 cp->cpcmd &= ~RxChkSum;
1da177e4 1473
f646968f 1474 if (features & NETIF_F_HW_VLAN_CTAG_RX)
6864ddb2 1475 cp->cpcmd |= RxVlanOn;
1476 else
1477 cp->cpcmd &= ~RxVlanOn;
1478
044a890c
MM		 1479 cpw16_f(CpCmd, cp->cpcmd);
1480 spin_unlock_irqrestore(&cp->lock, flags);
1da177e4
LT		 1481
1482 return 0;
1483}
1484
1485static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1486 void *p)
1487{
1488 struct cp_private *cp = netdev_priv(dev);
1489 unsigned long flags;
1490
1491 if (regs->len < CP_REGS_SIZE)
1492 return /* -EINVAL */;
1493
1494 regs->version = CP_REGS_VER;
1495
1496 spin_lock_irqsave(&cp->lock, flags);
1497 memcpy_fromio(p, cp->regs, CP_REGS_SIZE);
1498 spin_unlock_irqrestore(&cp->lock, flags);
1499}
1500
1501static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1502{
1503 struct cp_private *cp = netdev_priv(dev);
1504 unsigned long flags;
1505
1506 spin_lock_irqsave (&cp->lock, flags);
1507 netdev_get_wol (cp, wol);
1508 spin_unlock_irqrestore (&cp->lock, flags);
1509}
1510
1511static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1512{
1513 struct cp_private *cp = netdev_priv(dev);
1514 unsigned long flags;
1515 int rc;
1516
1517 spin_lock_irqsave (&cp->lock, flags);
1518 rc = netdev_set_wol (cp, wol);
1519 spin_unlock_irqrestore (&cp->lock, flags);
1520
1521 return rc;
1522}
1523
1524static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf)
1525{
1526 switch (stringset) {
1527 case ETH_SS_STATS:
1528 memcpy(buf, &ethtool_stats_keys, sizeof(ethtool_stats_keys));
1529 break;
1530 default:
1531 BUG();
1532 break;
1533 }
1534}
1535
1536static void cp_get_ethtool_stats (struct net_device *dev,
1537 struct ethtool_stats *estats, u64 *tmp_stats)
1538{
1539 struct cp_private *cp = netdev_priv(dev);
8b512927
SH		 1540 struct cp_dma_stats *nic_stats;
1541 dma_addr_t dma;
1da177e4
LT		 1542 int i;
1543
6cc92cdd
JG		 1544 nic_stats = dma_alloc_coherent(&cp->pdev->dev, sizeof(*nic_stats),
1545 &dma, GFP_KERNEL);
8b512927
SH		 1546 if (!nic_stats)
1547 return;
97f568d8 1548
1da177e4 1549 /* begin NIC statistics dump */
8b512927 1550 cpw32(StatsAddr + 4, (u64)dma >> 32);
284901a9 1551 cpw32(StatsAddr, ((u64)dma & DMA_BIT_MASK(32)) | DumpStats);
1da177e4
LT		 1552 cpr32(StatsAddr);
1553
97f568d8 1554 for (i = 0; i < 1000; i++) {
1da177e4
LT		 1555 if ((cpr32(StatsAddr) & DumpStats) == 0)
1556 break;
97f568d8 1557 udelay(10);
1da177e4 1558 }
97f568d8
SH		 1559 cpw32(StatsAddr, 0);
1560 cpw32(StatsAddr + 4, 0);
8b512927 1561 cpr32(StatsAddr);
1da177e4
LT		 1562
1563 i = 0;
8b512927
SH		 1564 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_ok);
1565 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok);
1566 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_err);
1567 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_err);
1568 tmp_stats[i++] = le16_to_cpu(nic_stats->rx_fifo);
1569 tmp_stats[i++] = le16_to_cpu(nic_stats->frame_align);
1570 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_1col);
1571 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_mcol);
1572 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_phys);
1573 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_bcast);
1574 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_ok_mcast);
1575 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_abort);
1576 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_underrun);
1da177e4 1577 tmp_stats[i++] = cp->cp_stats.rx_frags;
5d9428de 1578 BUG_ON(i != CP_NUM_STATS);
8b512927 1579
6cc92cdd 1580 dma_free_coherent(&cp->pdev->dev, sizeof(*nic_stats), nic_stats, dma);
1da177e4
LT		 1581}
1582
7282d491 1583static const struct ethtool_ops cp_ethtool_ops = {
1da177e4
LT		 1584 .get_drvinfo = cp_get_drvinfo,
1585 .get_regs_len = cp_get_regs_len,
b9f2c044 1586 .get_sset_count = cp_get_sset_count,
1da177e4
LT		 1587 .get_settings = cp_get_settings,
1588 .set_settings = cp_set_settings,
1589 .nway_reset = cp_nway_reset,
1590 .get_link = ethtool_op_get_link,
1591 .get_msglevel = cp_get_msglevel,
1592 .set_msglevel = cp_set_msglevel,
1da177e4
LT		 1593 .get_regs = cp_get_regs,
1594 .get_wol = cp_get_wol,
1595 .set_wol = cp_set_wol,
1596 .get_strings = cp_get_strings,
1597 .get_ethtool_stats = cp_get_ethtool_stats,
722fdb33
PC		 1598 .get_eeprom_len = cp_get_eeprom_len,
1599 .get_eeprom = cp_get_eeprom,
1600 .set_eeprom = cp_set_eeprom,
1d0861ac 1601 .get_ringparam = cp_get_ringparam,
1da177e4
LT		 1602};
1603
1604static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1605{
1606 struct cp_private *cp = netdev_priv(dev);
1607 int rc;
1608 unsigned long flags;
1609
1610 if (!netif_running(dev))
1611 return -EINVAL;
1612
1613 spin_lock_irqsave(&cp->lock, flags);
1614 rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL);
1615 spin_unlock_irqrestore(&cp->lock, flags);
1616 return rc;
1617}
1618
c048aaf4
JP		 1619static int cp_set_mac_address(struct net_device *dev, void *p)
1620{
1621 struct cp_private *cp = netdev_priv(dev);
1622 struct sockaddr *addr = p;
1623
1624 if (!is_valid_ether_addr(addr->sa_data))
1625 return -EADDRNOTAVAIL;
1626
1627 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1628
1629 spin_lock_irq(&cp->lock);
1630
1631 cpw8_f(Cfg9346, Cfg9346_Unlock);
1632 cpw32_f(MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1633 cpw32_f(MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1634 cpw8_f(Cfg9346, Cfg9346_Lock);
1635
1636 spin_unlock_irq(&cp->lock);
1637
1638 return 0;
1639}
1640
1da177e4
LT		 1641/* Serial EEPROM section. */
1642
1643/* EEPROM_Ctrl bits. */
1644#define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1645#define EE_CS 0x08 /* EEPROM chip select. */
1646#define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1647#define EE_WRITE_0 0x00
1648#define EE_WRITE_1 0x02
1649#define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1650#define EE_ENB (0x80 | EE_CS)
1651
1652/* Delay between EEPROM clock transitions.
1653 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1654 */
1655
7d03f5a4 1656#define eeprom_delay() readb(ee_addr)
1da177e4
LT		 1657
1658/* The EEPROM commands include the alway-set leading bit. */
722fdb33 1659#define EE_EXTEND_CMD (4)
1da177e4
LT		 1660#define EE_WRITE_CMD (5)
1661#define EE_READ_CMD (6)
1662#define EE_ERASE_CMD (7)
1663
722fdb33
PC		 1664#define EE_EWDS_ADDR (0)
1665#define EE_WRAL_ADDR (1)
1666#define EE_ERAL_ADDR (2)
1667#define EE_EWEN_ADDR (3)
1668
1669#define CP_EEPROM_MAGIC PCI_DEVICE_ID_REALTEK_8139
1da177e4 1670
722fdb33
PC		 1671static void eeprom_cmd_start(void __iomem *ee_addr)
1672{
1da177e4
LT		 1673 writeb (EE_ENB & ~EE_CS, ee_addr);
1674 writeb (EE_ENB, ee_addr);
1675 eeprom_delay ();
722fdb33 1676}
1da177e4 1677
722fdb33
PC		 1678static void eeprom_cmd(void __iomem *ee_addr, int cmd, int cmd_len)
1679{
1680 int i;
1681
1682 /* Shift the command bits out. */
1683 for (i = cmd_len - 1; i >= 0; i--) {
1684 int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1da177e4
LT		 1685 writeb (EE_ENB | dataval, ee_addr);
1686 eeprom_delay ();
1687 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1688 eeprom_delay ();
1689 }
1690 writeb (EE_ENB, ee_addr);
1691 eeprom_delay ();
722fdb33
PC		 1692}
1693
1694static void eeprom_cmd_end(void __iomem *ee_addr)
1695{
0bc777bc 1696 writeb(0, ee_addr);
722fdb33
PC		 1697 eeprom_delay ();
1698}
1699
1700static void eeprom_extend_cmd(void __iomem *ee_addr, int extend_cmd,
1701 int addr_len)
1702{
1703 int cmd = (EE_EXTEND_CMD << addr_len) | (extend_cmd << (addr_len - 2));
1704
1705 eeprom_cmd_start(ee_addr);
1706 eeprom_cmd(ee_addr, cmd, 3 + addr_len);
1707 eeprom_cmd_end(ee_addr);
1708}
1709
1710static u16 read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1711{
1712 int i;
1713 u16 retval = 0;
1714 void __iomem *ee_addr = ioaddr + Cfg9346;
1715 int read_cmd = location | (EE_READ_CMD << addr_len);
1716
1717 eeprom_cmd_start(ee_addr);
1718 eeprom_cmd(ee_addr, read_cmd, 3 + addr_len);
1da177e4
LT		 1719
1720 for (i = 16; i > 0; i--) {
1721 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
1722 eeprom_delay ();
1723 retval =
1724 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
1725 0);
1726 writeb (EE_ENB, ee_addr);
1727 eeprom_delay ();
1728 }
1729
722fdb33 1730 eeprom_cmd_end(ee_addr);
1da177e4
LT		 1731
1732 return retval;
1733}
1734
722fdb33
PC		 1735static void write_eeprom(void __iomem *ioaddr, int location, u16 val,
1736 int addr_len)
1737{
1738 int i;
1739 void __iomem *ee_addr = ioaddr + Cfg9346;
1740 int write_cmd = location | (EE_WRITE_CMD << addr_len);
1741
1742 eeprom_extend_cmd(ee_addr, EE_EWEN_ADDR, addr_len);
1743
1744 eeprom_cmd_start(ee_addr);
1745 eeprom_cmd(ee_addr, write_cmd, 3 + addr_len);
1746 eeprom_cmd(ee_addr, val, 16);
1747 eeprom_cmd_end(ee_addr);
1748
1749 eeprom_cmd_start(ee_addr);
1750 for (i = 0; i < 20000; i++)
1751 if (readb(ee_addr) & EE_DATA_READ)
1752 break;
1753 eeprom_cmd_end(ee_addr);
1754
1755 eeprom_extend_cmd(ee_addr, EE_EWDS_ADDR, addr_len);
1756}
1757
1758static int cp_get_eeprom_len(struct net_device *dev)
1759{
1760 struct cp_private *cp = netdev_priv(dev);
1761 int size;
1762
1763 spin_lock_irq(&cp->lock);
1764 size = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 256 : 128;
1765 spin_unlock_irq(&cp->lock);
1766
1767 return size;
1768}
1769
1770static int cp_get_eeprom(struct net_device *dev,
1771 struct ethtool_eeprom *eeprom, u8 *data)
1772{
1773 struct cp_private *cp = netdev_priv(dev);
1774 unsigned int addr_len;
1775 u16 val;
1776 u32 offset = eeprom->offset >> 1;
1777 u32 len = eeprom->len;
1778 u32 i = 0;
1779
1780 eeprom->magic = CP_EEPROM_MAGIC;
1781
1782 spin_lock_irq(&cp->lock);
1783
1784 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1785
1786 if (eeprom->offset & 1) {
1787 val = read_eeprom(cp->regs, offset, addr_len);
1788 data[i++] = (u8)(val >> 8);
1789 offset++;
1790 }
1791
1792 while (i < len - 1) {
1793 val = read_eeprom(cp->regs, offset, addr_len);
1794 data[i++] = (u8)val;
1795 data[i++] = (u8)(val >> 8);
1796 offset++;
1797 }
1798
1799 if (i < len) {
1800 val = read_eeprom(cp->regs, offset, addr_len);
1801 data[i] = (u8)val;
1802 }
1803
1804 spin_unlock_irq(&cp->lock);
1805 return 0;
1806}
1807
1808static int cp_set_eeprom(struct net_device *dev,
1809 struct ethtool_eeprom *eeprom, u8 *data)
1810{
1811 struct cp_private *cp = netdev_priv(dev);
1812 unsigned int addr_len;
1813 u16 val;
1814 u32 offset = eeprom->offset >> 1;
1815 u32 len = eeprom->len;
1816 u32 i = 0;
1817
1818 if (eeprom->magic != CP_EEPROM_MAGIC)
1819 return -EINVAL;
1820
1821 spin_lock_irq(&cp->lock);
1822
1823 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1824
1825 if (eeprom->offset & 1) {
1826 val = read_eeprom(cp->regs, offset, addr_len) & 0xff;
1827 val |= (u16)data[i++] << 8;
1828 write_eeprom(cp->regs, offset, val, addr_len);
1829 offset++;
1830 }
1831
1832 while (i < len - 1) {
1833 val = (u16)data[i++];
1834 val |= (u16)data[i++] << 8;
1835 write_eeprom(cp->regs, offset, val, addr_len);
1836 offset++;
1837 }
1838
1839 if (i < len) {
1840 val = read_eeprom(cp->regs, offset, addr_len) & 0xff00;
1841 val |= (u16)data[i];
1842 write_eeprom(cp->regs, offset, val, addr_len);
1843 }
1844
1845 spin_unlock_irq(&cp->lock);
1846 return 0;
1847}
1848
1da177e4
LT		 1849/* Put the board into D3cold state and wait for WakeUp signal */
1850static void cp_set_d3_state (struct cp_private *cp)
1851{
1ca01512 1852 pci_enable_wake(cp->pdev, PCI_D0, 1); /* Enable PME# generation */
1da177e4
LT		 1853 pci_set_power_state (cp->pdev, PCI_D3hot);
1854}
1855
48dfcde4
SH		 1856static const struct net_device_ops cp_netdev_ops = {
1857 .ndo_open = cp_open,
1858 .ndo_stop = cp_close,
1859 .ndo_validate_addr = eth_validate_addr,
c048aaf4 1860 .ndo_set_mac_address = cp_set_mac_address,
afc4b13d 1861 .ndo_set_rx_mode = cp_set_rx_mode,
48dfcde4
SH		 1862 .ndo_get_stats = cp_get_stats,
1863 .ndo_do_ioctl = cp_ioctl,
00829823 1864 .ndo_start_xmit = cp_start_xmit,
48dfcde4 1865 .ndo_tx_timeout = cp_tx_timeout,
044a890c 1866 .ndo_set_features = cp_set_features,
48dfcde4 1867 .ndo_change_mtu = cp_change_mtu,
fe96aaa1 1868
48dfcde4
SH		 1869#ifdef CONFIG_NET_POLL_CONTROLLER
1870 .ndo_poll_controller = cp_poll_controller,
1871#endif
1872};
1873
1da177e4
LT		 1874static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1875{
1876 struct net_device *dev;
1877 struct cp_private *cp;
1878 int rc;
1879 void __iomem *regs;
2427ddd8 1880 resource_size_t pciaddr;
1da177e4 1881 unsigned int addr_len, i, pci_using_dac;
1da177e4 1882
5490c272 1883 pr_info_once("%s", version);
1da177e4 1884
1da177e4 1885 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
44c10138 1886 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision < 0x20) {
de4549ca 1887 dev_info(&pdev->dev,
b4f18b3f
JP		 1888 "This (id %04x:%04x rev %02x) is not an 8139C+ compatible chip, use 8139too\n",
1889 pdev->vendor, pdev->device, pdev->revision);
1da177e4
LT		 1890 return -ENODEV;
1891 }
1892
1893 dev = alloc_etherdev(sizeof(struct cp_private));
1894 if (!dev)
1895 return -ENOMEM;
1da177e4
LT		 1896 SET_NETDEV_DEV(dev, &pdev->dev);
1897
1898 cp = netdev_priv(dev);
1899 cp->pdev = pdev;
1900 cp->dev = dev;
1901 cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug);
1902 spin_lock_init (&cp->lock);
1903 cp->mii_if.dev = dev;
1904 cp->mii_if.mdio_read = mdio_read;
1905 cp->mii_if.mdio_write = mdio_write;
1906 cp->mii_if.phy_id = CP_INTERNAL_PHY;
1907 cp->mii_if.phy_id_mask = 0x1f;
1908 cp->mii_if.reg_num_mask = 0x1f;
1909 cp_set_rxbufsize(cp);
1910
1911 rc = pci_enable_device(pdev);
1912 if (rc)
1913 goto err_out_free;
1914
1915 rc = pci_set_mwi(pdev);
1916 if (rc)
1917 goto err_out_disable;
1918
1919 rc = pci_request_regions(pdev, DRV_NAME);
1920 if (rc)
1921 goto err_out_mwi;
1922
1923 pciaddr = pci_resource_start(pdev, 1);
1924 if (!pciaddr) {
1925 rc = -EIO;
9b91cf9d 1926 dev_err(&pdev->dev, "no MMIO resource\n");
1da177e4
LT		 1927 goto err_out_res;
1928 }
1929 if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) {
1930 rc = -EIO;
9b91cf9d 1931 dev_err(&pdev->dev, "MMIO resource (%llx) too small\n",
2e8a538d 1932 (unsigned long long)pci_resource_len(pdev, 1));
1da177e4
LT		 1933 goto err_out_res;
1934 }
1935
1936 /* Configure DMA attributes. */
1937 if ((sizeof(dma_addr_t) > 4) &&
6a35528a
YH		 1938 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) &&
1939 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
1da177e4
LT		 1940 pci_using_dac = 1;
1941 } else {
1942 pci_using_dac = 0;
1943
284901a9 1944 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1da177e4 1945 if (rc) {
9b91cf9d 1946 dev_err(&pdev->dev,
b4f18b3f 1947 "No usable DMA configuration, aborting\n");
1da177e4
LT		 1948 goto err_out_res;
1949 }
284901a9 1950 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1da177e4 1951 if (rc) {
9b91cf9d 1952 dev_err(&pdev->dev,
b4f18b3f 1953 "No usable consistent DMA configuration, aborting\n");
1da177e4
LT		 1954 goto err_out_res;
1955 }
1956 }
1957
1958 cp->cpcmd = (pci_using_dac ? PCIDAC : 0) |
1959 PCIMulRW | RxChkSum | CpRxOn | CpTxOn;
1960
044a890c
MM		 1961 dev->features |= NETIF_F_RXCSUM;
1962 dev->hw_features |= NETIF_F_RXCSUM;
1963
1da177e4
LT		 1964 regs = ioremap(pciaddr, CP_REGS_SIZE);
1965 if (!regs) {
1966 rc = -EIO;
4626dd46 1967 dev_err(&pdev->dev, "Cannot map PCI MMIO (%Lx@%Lx)\n",
b4f18b3f 1968 (unsigned long long)pci_resource_len(pdev, 1),
2e8a538d 1969 (unsigned long long)pciaddr);
1da177e4
LT		 1970 goto err_out_res;
1971 }
1da177e4
LT		 1972 cp->regs = regs;
1973
1974 cp_stop_hw(cp);
1975
1976 /* read MAC address from EEPROM */
1977 addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6;
1978 for (i = 0; i < 3; i++)
03233b90
AV		 1979 ((__le16 *) (dev->dev_addr))[i] =
1980 cpu_to_le16(read_eeprom (regs, i + 7, addr_len));
1da177e4 1981
48dfcde4 1982 dev->netdev_ops = &cp_netdev_ops;
bea3348e 1983 netif_napi_add(dev, &cp->napi, cp_rx_poll, 16);
1da177e4 1984 dev->ethtool_ops = &cp_ethtool_ops;
1da177e4 1985 dev->watchdog_timeo = TX_TIMEOUT;
1da177e4 1986
f646968f 1987 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
1da177e4
LT		 1988
1989 if (pci_using_dac)
1990 dev->features |= NETIF_F_HIGHDMA;
1991
044a890c 1992 /* disabled by default until verified */
6864ddb2 1993 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
f646968f 1994 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
6864ddb2 1995 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1996 NETIF_F_HIGHDMA;
fcec3456 1997
1da177e4
LT		 1998 rc = register_netdev(dev);
1999 if (rc)
2000 goto err_out_iomap;
2001
a69afe32
FR		 2002 netdev_info(dev, "RTL-8139C+ at 0x%p, %pM, IRQ %d\n",
2003 regs, dev->dev_addr, pdev->irq);
1da177e4
LT		 2004
2005 pci_set_drvdata(pdev, dev);
2006
2007 /* enable busmastering and memory-write-invalidate */
2008 pci_set_master(pdev);
2009
2e8a538d
JG		 2010 if (cp->wol_enabled)
2011 cp_set_d3_state (cp);
1da177e4
LT		 2012
2013 return 0;
2014
2015err_out_iomap:
2016 iounmap(regs);
2017err_out_res:
2018 pci_release_regions(pdev);
2019err_out_mwi:
2020 pci_clear_mwi(pdev);
2021err_out_disable:
2022 pci_disable_device(pdev);
2023err_out_free:
2024 free_netdev(dev);
2025 return rc;
2026}
2027
2028static void cp_remove_one (struct pci_dev *pdev)
2029{
2030 struct net_device *dev = pci_get_drvdata(pdev);
2031 struct cp_private *cp = netdev_priv(dev);
2032
1da177e4
LT		 2033 unregister_netdev(dev);
2034 iounmap(cp->regs);
2e8a538d
JG		 2035 if (cp->wol_enabled)
2036 pci_set_power_state (pdev, PCI_D0);
1da177e4
LT		 2037 pci_release_regions(pdev);
2038 pci_clear_mwi(pdev);
2039 pci_disable_device(pdev);
1da177e4
LT		 2040 free_netdev(dev);
2041}
2042
2043#ifdef CONFIG_PM
05adc3b7 2044static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
1da177e4 2045{
7668a494
FR		 2046 struct net_device *dev = pci_get_drvdata(pdev);
2047 struct cp_private *cp = netdev_priv(dev);
1da177e4
LT		 2048 unsigned long flags;
2049
7668a494
FR		 2050 if (!netif_running(dev))
2051 return 0;
1da177e4
LT		 2052
2053 netif_device_detach (dev);
2054 netif_stop_queue (dev);
2055
2056 spin_lock_irqsave (&cp->lock, flags);
2057
2058 /* Disable Rx and Tx */
2059 cpw16 (IntrMask, 0);
2060 cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn));
2061
2062 spin_unlock_irqrestore (&cp->lock, flags);
2063
576cfa93
FR		 2064 pci_save_state(pdev);
2065 pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
2066 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 2067
2068 return 0;
2069}
2070
2071static int cp_resume (struct pci_dev *pdev)
2072{
576cfa93
FR		 2073 struct net_device *dev = pci_get_drvdata (pdev);
2074 struct cp_private *cp = netdev_priv(dev);
a4cf0761 2075 unsigned long flags;
1da177e4 2076
576cfa93
FR		 2077 if (!netif_running(dev))
2078 return 0;
1da177e4
LT		 2079
2080 netif_device_attach (dev);
576cfa93
FR		 2081
2082 pci_set_power_state(pdev, PCI_D0);
2083 pci_restore_state(pdev);
2084 pci_enable_wake(pdev, PCI_D0, 0);
2085
2086 /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
2087 cp_init_rings_index (cp);
1da177e4 2088 cp_init_hw (cp);
a8c9cb10 2089 cp_enable_irq(cp);
1da177e4 2090 netif_start_queue (dev);
a4cf0761
PO		 2091
2092 spin_lock_irqsave (&cp->lock, flags);
2093
2501f843 2094 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
a4cf0761
PO		 2095
2096 spin_unlock_irqrestore (&cp->lock, flags);
f3b197ac 2097
1da177e4
LT		 2098 return 0;
2099}
2100#endif /* CONFIG_PM */
2101
96b3bff4
VB		 2102static const struct pci_device_id cp_pci_tbl[] = {
2103 { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
2104 { PCI_DEVICE(PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322), },
2105 { },
2106};
2107MODULE_DEVICE_TABLE(pci, cp_pci_tbl);
2108
1da177e4
LT		 2109static struct pci_driver cp_driver = {
2110 .name = DRV_NAME,
2111 .id_table = cp_pci_tbl,
2112 .probe = cp_init_one,
2113 .remove = cp_remove_one,
2114#ifdef CONFIG_PM
2115 .resume = cp_resume,
2116 .suspend = cp_suspend,
2117#endif
2118};
2119
5490c272 2120module_pci_driver(cp_driver);
Linux kernel - Deliverables
This page took 1.06283 seconds and 5 git commands to generate.