1 /* 8139cp.c: A Linux PCI Ethernet driver for the RealTek 8139C+ chips. */
3 Copyright 2001-2004 Jeff Garzik <jgarzik@pobox.com>
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]
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.
19 See the file COPYING in this distribution for more information.
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>
28 * Test Tx checksumming thoroughly
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
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)
44 * TX checksumming is considered experimental. It is off by
45 default, use ethtool to turn it on.
49 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
51 #define DRV_NAME "8139cp"
52 #define DRV_VERSION "1.3"
53 #define DRV_RELDATE "Mar 22, 2004"
56 #include <linux/module.h>
57 #include <linux/moduleparam.h>
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>
63 #include <linux/interrupt.h>
64 #include <linux/pci.h>
65 #include <linux/dma-mapping.h>
66 #include <linux/delay.h>
67 #include <linux/ethtool.h>
68 #include <linux/gfp.h>
69 #include <linux/mii.h>
70 #include <linux/if_vlan.h>
71 #include <linux/crc32.h>
74 #include <linux/tcp.h>
75 #include <linux/udp.h>
76 #include <linux/cache.h>
79 #include <linux/uaccess.h>
81 /* These identify the driver base version and may not be removed. */
82 static char version[] =
83 DRV_NAME ": 10/100 PCI Ethernet driver v" DRV_VERSION " (" DRV_RELDATE ")\n";
85 MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
86 MODULE_DESCRIPTION("RealTek RTL-8139C+ series 10/100 PCI Ethernet driver");
87 MODULE_VERSION(DRV_VERSION);
88 MODULE_LICENSE("GPL");
90 static int debug = -1;
91 module_param(debug, int, 0);
92 MODULE_PARM_DESC (debug, "8139cp: bitmapped message enable number");
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. */
96 static int multicast_filter_limit = 32;
97 module_param(multicast_filter_limit, int, 0);
98 MODULE_PARM_DESC (multicast_filter_limit, "8139cp: maximum number of filtered multicast addresses");
100 #define CP_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
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) + \
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)
120 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
121 #define CP_INTERNAL_PHY 32
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 */
129 /* Time in jiffies before concluding the transmitter is hung. */
130 #define TX_TIMEOUT (6*HZ)
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
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 TxDmaOkLowDesc = 0x82, /* Low 16 bit address of a Tx descriptor. */
161 Config5 = 0xD8, /* Config5 */
162 TxPoll = 0xD9, /* Tell chip to check Tx descriptors for work */
163 RxMaxSize = 0xDA, /* Max size of an Rx packet (8169 only) */
164 CpCmd = 0xE0, /* C+ Command register (C+ mode only) */
165 IntrMitigate = 0xE2, /* rx/tx interrupt mitigation control */
166 RxRingAddr = 0xE4, /* 64-bit start addr of Rx ring */
167 TxThresh = 0xEC, /* Early Tx threshold */
168 OldRxBufAddr = 0x30, /* DMA address of Rx ring buffer (C mode) */
169 OldTSD0 = 0x10, /* DMA address of first Tx desc (C mode) */
171 /* Tx and Rx status descriptors */
172 DescOwn = (1 << 31), /* Descriptor is owned by NIC */
173 RingEnd = (1 << 30), /* End of descriptor ring */
174 FirstFrag = (1 << 29), /* First segment of a packet */
175 LastFrag = (1 << 28), /* Final segment of a packet */
176 LargeSend = (1 << 27), /* TCP Large Send Offload (TSO) */
177 MSSShift = 16, /* MSS value position */
178 MSSMask = 0x7ff, /* MSS value: 11 bits */
179 TxError = (1 << 23), /* Tx error summary */
180 RxError = (1 << 20), /* Rx error summary */
181 IPCS = (1 << 18), /* Calculate IP checksum */
182 UDPCS = (1 << 17), /* Calculate UDP/IP checksum */
183 TCPCS = (1 << 16), /* Calculate TCP/IP checksum */
184 TxVlanTag = (1 << 17), /* Add VLAN tag */
185 RxVlanTagged = (1 << 16), /* Rx VLAN tag available */
186 IPFail = (1 << 15), /* IP checksum failed */
187 UDPFail = (1 << 14), /* UDP/IP checksum failed */
188 TCPFail = (1 << 13), /* TCP/IP checksum failed */
189 NormalTxPoll = (1 << 6), /* One or more normal Tx packets to send */
190 PID1 = (1 << 17), /* 2 protocol id bits: 0==non-IP, */
191 PID0 = (1 << 16), /* 1==UDP/IP, 2==TCP/IP, 3==IP */
195 TxFIFOUnder = (1 << 25), /* Tx FIFO underrun */
196 TxOWC = (1 << 22), /* Tx Out-of-window collision */
197 TxLinkFail = (1 << 21), /* Link failed during Tx of packet */
198 TxMaxCol = (1 << 20), /* Tx aborted due to excessive collisions */
199 TxColCntShift = 16, /* Shift, to get 4-bit Tx collision cnt */
200 TxColCntMask = 0x01 | 0x02 | 0x04 | 0x08, /* 4-bit collision count */
201 RxErrFrame = (1 << 27), /* Rx frame alignment error */
202 RxMcast = (1 << 26), /* Rx multicast packet rcv'd */
203 RxErrCRC = (1 << 18), /* Rx CRC error */
204 RxErrRunt = (1 << 19), /* Rx error, packet < 64 bytes */
205 RxErrLong = (1 << 21), /* Rx error, packet > 4096 bytes */
206 RxErrFIFO = (1 << 22), /* Rx error, FIFO overflowed, pkt bad */
208 /* StatsAddr register */
209 DumpStats = (1 << 3), /* Begin stats dump */
211 /* RxConfig register */
212 RxCfgFIFOShift = 13, /* Shift, to get Rx FIFO thresh value */
213 RxCfgDMAShift = 8, /* Shift, to get Rx Max DMA value */
214 AcceptErr = 0x20, /* Accept packets with CRC errors */
215 AcceptRunt = 0x10, /* Accept runt (<64 bytes) packets */
216 AcceptBroadcast = 0x08, /* Accept broadcast packets */
217 AcceptMulticast = 0x04, /* Accept multicast packets */
218 AcceptMyPhys = 0x02, /* Accept pkts with our MAC as dest */
219 AcceptAllPhys = 0x01, /* Accept all pkts w/ physical dest */
221 /* IntrMask / IntrStatus registers */
222 PciErr = (1 << 15), /* System error on the PCI bus */
223 TimerIntr = (1 << 14), /* Asserted when TCTR reaches TimerInt value */
224 LenChg = (1 << 13), /* Cable length change */
225 SWInt = (1 << 8), /* Software-requested interrupt */
226 TxEmpty = (1 << 7), /* No Tx descriptors available */
227 RxFIFOOvr = (1 << 6), /* Rx FIFO Overflow */
228 LinkChg = (1 << 5), /* Packet underrun, or link change */
229 RxEmpty = (1 << 4), /* No Rx descriptors available */
230 TxErr = (1 << 3), /* Tx error */
231 TxOK = (1 << 2), /* Tx packet sent */
232 RxErr = (1 << 1), /* Rx error */
233 RxOK = (1 << 0), /* Rx packet received */
234 IntrResvd = (1 << 10), /* reserved, according to RealTek engineers,
235 but hardware likes to raise it */
237 IntrAll = PciErr | TimerIntr | LenChg | SWInt | TxEmpty |
238 RxFIFOOvr | LinkChg | RxEmpty | TxErr | TxOK |
239 RxErr | RxOK | IntrResvd,
241 /* C mode command register */
242 CmdReset = (1 << 4), /* Enable to reset; self-clearing */
243 RxOn = (1 << 3), /* Rx mode enable */
244 TxOn = (1 << 2), /* Tx mode enable */
246 /* C+ mode command register */
247 RxVlanOn = (1 << 6), /* Rx VLAN de-tagging enable */
248 RxChkSum = (1 << 5), /* Rx checksum offload enable */
249 PCIDAC = (1 << 4), /* PCI Dual Address Cycle (64-bit PCI) */
250 PCIMulRW = (1 << 3), /* Enable PCI read/write multiple */
251 CpRxOn = (1 << 1), /* Rx mode enable */
252 CpTxOn = (1 << 0), /* Tx mode enable */
254 /* Cfg9436 EEPROM control register */
255 Cfg9346_Lock = 0x00, /* Lock ConfigX/MII register access */
256 Cfg9346_Unlock = 0xC0, /* Unlock ConfigX/MII register access */
258 /* TxConfig register */
259 IFG = (1 << 25) | (1 << 24), /* standard IEEE interframe gap */
260 TxDMAShift = 8, /* DMA burst value (0-7) is shift this many bits */
262 /* Early Tx Threshold register */
263 TxThreshMask = 0x3f, /* Mask bits 5-0 */
264 TxThreshMax = 2048, /* Max early Tx threshold */
266 /* Config1 register */
267 DriverLoaded = (1 << 5), /* Software marker, driver is loaded */
268 LWACT = (1 << 4), /* LWAKE active mode */
269 PMEnable = (1 << 0), /* Enable various PM features of chip */
271 /* Config3 register */
272 PARMEnable = (1 << 6), /* Enable auto-loading of PHY parms */
273 MagicPacket = (1 << 5), /* Wake up when receives a Magic Packet */
274 LinkUp = (1 << 4), /* Wake up when the cable connection is re-established */
276 /* Config4 register */
277 LWPTN = (1 << 1), /* LWAKE Pattern */
278 LWPME = (1 << 4), /* LANWAKE vs PMEB */
280 /* Config5 register */
281 BWF = (1 << 6), /* Accept Broadcast wakeup frame */
282 MWF = (1 << 5), /* Accept Multicast wakeup frame */
283 UWF = (1 << 4), /* Accept Unicast wakeup frame */
284 LANWake = (1 << 1), /* Enable LANWake signal */
285 PMEStatus = (1 << 0), /* PME status can be reset by PCI RST# */
287 cp_norx_intr_mask = PciErr | LinkChg | TxOK | TxErr | TxEmpty,
288 cp_rx_intr_mask = RxOK | RxErr | RxEmpty | RxFIFOOvr,
289 cp_intr_mask = cp_rx_intr_mask | cp_norx_intr_mask,
292 static const unsigned int cp_rx_config =
293 (RX_FIFO_THRESH << RxCfgFIFOShift) |
294 (RX_DMA_BURST << RxCfgDMAShift);
302 struct cp_dma_stats {
318 struct cp_extra_stats {
319 unsigned long rx_frags;
324 struct net_device *dev;
328 struct napi_struct napi;
330 struct pci_dev *pdev;
334 struct cp_extra_stats cp_stats;
336 unsigned rx_head ____cacheline_aligned;
338 struct cp_desc *rx_ring;
339 struct sk_buff *rx_skb[CP_RX_RING_SIZE];
341 unsigned tx_head ____cacheline_aligned;
343 struct cp_desc *tx_ring;
344 struct sk_buff *tx_skb[CP_TX_RING_SIZE];
345 u32 tx_opts[CP_TX_RING_SIZE];
348 unsigned wol_enabled : 1; /* Is Wake-on-LAN enabled? */
352 struct mii_if_info mii_if;
355 #define cpr8(reg) readb(cp->regs + (reg))
356 #define cpr16(reg) readw(cp->regs + (reg))
357 #define cpr32(reg) readl(cp->regs + (reg))
358 #define cpw8(reg,val) writeb((val), cp->regs + (reg))
359 #define cpw16(reg,val) writew((val), cp->regs + (reg))
360 #define cpw32(reg,val) writel((val), cp->regs + (reg))
361 #define cpw8_f(reg,val) do { \
362 writeb((val), cp->regs + (reg)); \
363 readb(cp->regs + (reg)); \
365 #define cpw16_f(reg,val) do { \
366 writew((val), cp->regs + (reg)); \
367 readw(cp->regs + (reg)); \
369 #define cpw32_f(reg,val) do { \
370 writel((val), cp->regs + (reg)); \
371 readl(cp->regs + (reg)); \
375 static void __cp_set_rx_mode (struct net_device *dev);
376 static void cp_tx (struct cp_private *cp);
377 static void cp_clean_rings (struct cp_private *cp);
378 #ifdef CONFIG_NET_POLL_CONTROLLER
379 static void cp_poll_controller(struct net_device *dev);
381 static int cp_get_eeprom_len(struct net_device *dev);
382 static int cp_get_eeprom(struct net_device *dev,
383 struct ethtool_eeprom *eeprom, u8 *data);
384 static int cp_set_eeprom(struct net_device *dev,
385 struct ethtool_eeprom *eeprom, u8 *data);
388 const char str[ETH_GSTRING_LEN];
389 } ethtool_stats_keys[] = {
407 static inline void cp_set_rxbufsize (struct cp_private *cp)
409 unsigned int mtu = cp->dev->mtu;
411 if (mtu > ETH_DATA_LEN)
412 /* MTU + ethernet header + FCS + optional VLAN tag */
413 cp->rx_buf_sz = mtu + ETH_HLEN + 8;
415 cp->rx_buf_sz = PKT_BUF_SZ;
418 static inline void cp_rx_skb (struct cp_private *cp, struct sk_buff *skb,
419 struct cp_desc *desc)
421 u32 opts2 = le32_to_cpu(desc->opts2);
423 skb->protocol = eth_type_trans (skb, cp->dev);
425 cp->dev->stats.rx_packets++;
426 cp->dev->stats.rx_bytes += skb->len;
428 if (opts2 & RxVlanTagged)
429 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), swab16(opts2 & 0xffff));
431 napi_gro_receive(&cp->napi, skb);
434 static void cp_rx_err_acct (struct cp_private *cp, unsigned rx_tail,
437 netif_dbg(cp, rx_err, cp->dev, "rx err, slot %d status 0x%x len %d\n",
438 rx_tail, status, len);
439 cp->dev->stats.rx_errors++;
440 if (status & RxErrFrame)
441 cp->dev->stats.rx_frame_errors++;
442 if (status & RxErrCRC)
443 cp->dev->stats.rx_crc_errors++;
444 if ((status & RxErrRunt) || (status & RxErrLong))
445 cp->dev->stats.rx_length_errors++;
446 if ((status & (FirstFrag | LastFrag)) != (FirstFrag | LastFrag))
447 cp->dev->stats.rx_length_errors++;
448 if (status & RxErrFIFO)
449 cp->dev->stats.rx_fifo_errors++;
452 static inline unsigned int cp_rx_csum_ok (u32 status)
454 unsigned int protocol = (status >> 16) & 0x3;
456 if (((protocol == RxProtoTCP) && !(status & TCPFail)) ||
457 ((protocol == RxProtoUDP) && !(status & UDPFail)))
463 static int cp_rx_poll(struct napi_struct *napi, int budget)
465 struct cp_private *cp = container_of(napi, struct cp_private, napi);
466 struct net_device *dev = cp->dev;
467 unsigned int rx_tail = cp->rx_tail;
470 cpw16(IntrStatus, cp_rx_intr_mask);
472 while (rx < budget) {
474 dma_addr_t mapping, new_mapping;
475 struct sk_buff *skb, *new_skb;
476 struct cp_desc *desc;
477 const unsigned buflen = cp->rx_buf_sz;
479 skb = cp->rx_skb[rx_tail];
482 desc = &cp->rx_ring[rx_tail];
483 status = le32_to_cpu(desc->opts1);
484 if (status & DescOwn)
487 len = (status & 0x1fff) - 4;
488 mapping = le64_to_cpu(desc->addr);
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
496 cp_rx_err_acct(cp, rx_tail, status, len);
497 dev->stats.rx_dropped++;
498 cp->cp_stats.rx_frags++;
502 if (status & (RxError | RxErrFIFO)) {
503 cp_rx_err_acct(cp, rx_tail, status, len);
507 netif_dbg(cp, rx_status, dev, "rx slot %d status 0x%x len %d\n",
508 rx_tail, status, len);
510 new_skb = napi_alloc_skb(napi, buflen);
512 dev->stats.rx_dropped++;
516 new_mapping = dma_map_single(&cp->pdev->dev, new_skb->data, buflen,
518 if (dma_mapping_error(&cp->pdev->dev, new_mapping)) {
519 dev->stats.rx_dropped++;
524 dma_unmap_single(&cp->pdev->dev, mapping,
525 buflen, PCI_DMA_FROMDEVICE);
527 /* Handle checksum offloading for incoming packets. */
528 if (cp_rx_csum_ok(status))
529 skb->ip_summed = CHECKSUM_UNNECESSARY;
531 skb_checksum_none_assert(skb);
535 cp->rx_skb[rx_tail] = new_skb;
537 cp_rx_skb(cp, skb, desc);
539 mapping = new_mapping;
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 |
548 desc->opts1 = cpu_to_le32(DescOwn | cp->rx_buf_sz);
549 rx_tail = NEXT_RX(rx_tail);
552 cp->rx_tail = rx_tail;
554 /* if we did not reach work limit, then we're done with
555 * this round of polling
557 if (rx < budget && napi_complete_done(napi, rx)) {
560 spin_lock_irqsave(&cp->lock, flags);
561 cpw16_f(IntrMask, cp_intr_mask);
562 spin_unlock_irqrestore(&cp->lock, flags);
568 static irqreturn_t cp_interrupt (int irq, void *dev_instance)
570 struct net_device *dev = dev_instance;
571 struct cp_private *cp;
575 if (unlikely(dev == NULL))
577 cp = netdev_priv(dev);
579 spin_lock(&cp->lock);
581 status = cpr16(IntrStatus);
582 if (!status || (status == 0xFFFF))
587 netif_dbg(cp, intr, dev, "intr, status %04x cmd %02x cpcmd %04x\n",
588 status, cpr8(Cmd), cpr16(CpCmd));
590 cpw16(IntrStatus, status & ~cp_rx_intr_mask);
592 /* close possible race's with dev_close */
593 if (unlikely(!netif_running(dev))) {
598 if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
599 if (napi_schedule_prep(&cp->napi)) {
600 cpw16_f(IntrMask, cp_norx_intr_mask);
601 __napi_schedule(&cp->napi);
604 if (status & (TxOK | TxErr | TxEmpty | SWInt))
606 if (status & LinkChg)
607 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
610 if (status & PciErr) {
613 pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
614 pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
615 netdev_err(dev, "PCI bus error, status=%04x, PCI status=%04x\n",
618 /* TODO: reset hardware */
622 spin_unlock(&cp->lock);
624 return IRQ_RETVAL(handled);
627 #ifdef CONFIG_NET_POLL_CONTROLLER
629 * Polling receive - used by netconsole and other diagnostic tools
630 * to allow network i/o with interrupts disabled.
632 static void cp_poll_controller(struct net_device *dev)
634 struct cp_private *cp = netdev_priv(dev);
635 const int irq = cp->pdev->irq;
638 cp_interrupt(irq, dev);
643 static void cp_tx (struct cp_private *cp)
645 unsigned tx_head = cp->tx_head;
646 unsigned tx_tail = cp->tx_tail;
647 unsigned bytes_compl = 0, pkts_compl = 0;
649 while (tx_tail != tx_head) {
650 struct cp_desc *txd = cp->tx_ring + tx_tail;
655 status = le32_to_cpu(txd->opts1);
656 if (status & DescOwn)
659 skb = cp->tx_skb[tx_tail];
662 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
663 cp->tx_opts[tx_tail] & 0xffff,
666 if (status & LastFrag) {
667 if (status & (TxError | TxFIFOUnder)) {
668 netif_dbg(cp, tx_err, cp->dev,
669 "tx err, status 0x%x\n", status);
670 cp->dev->stats.tx_errors++;
672 cp->dev->stats.tx_window_errors++;
673 if (status & TxMaxCol)
674 cp->dev->stats.tx_aborted_errors++;
675 if (status & TxLinkFail)
676 cp->dev->stats.tx_carrier_errors++;
677 if (status & TxFIFOUnder)
678 cp->dev->stats.tx_fifo_errors++;
680 cp->dev->stats.collisions +=
681 ((status >> TxColCntShift) & TxColCntMask);
682 cp->dev->stats.tx_packets++;
683 cp->dev->stats.tx_bytes += skb->len;
684 netif_dbg(cp, tx_done, cp->dev,
685 "tx done, slot %d\n", tx_tail);
687 bytes_compl += skb->len;
689 dev_kfree_skb_irq(skb);
692 cp->tx_skb[tx_tail] = NULL;
694 tx_tail = NEXT_TX(tx_tail);
697 cp->tx_tail = tx_tail;
699 netdev_completed_queue(cp->dev, pkts_compl, bytes_compl);
700 if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
701 netif_wake_queue(cp->dev);
704 static inline u32 cp_tx_vlan_tag(struct sk_buff *skb)
706 return skb_vlan_tag_present(skb) ?
707 TxVlanTag | swab16(skb_vlan_tag_get(skb)) : 0x00;
710 static void unwind_tx_frag_mapping(struct cp_private *cp, struct sk_buff *skb,
711 int first, int entry_last)
715 skb_frag_t *this_frag;
716 for (frag = 0; frag+first < entry_last; frag++) {
718 cp->tx_skb[index] = NULL;
719 txd = &cp->tx_ring[index];
720 this_frag = &skb_shinfo(skb)->frags[frag];
721 dma_unmap_single(&cp->pdev->dev, le64_to_cpu(txd->addr),
722 skb_frag_size(this_frag), PCI_DMA_TODEVICE);
726 static netdev_tx_t cp_start_xmit (struct sk_buff *skb,
727 struct net_device *dev)
729 struct cp_private *cp = netdev_priv(dev);
732 unsigned long intr_flags;
736 spin_lock_irqsave(&cp->lock, intr_flags);
738 /* This is a hard error, log it. */
739 if (TX_BUFFS_AVAIL(cp) <= (skb_shinfo(skb)->nr_frags + 1)) {
740 netif_stop_queue(dev);
741 spin_unlock_irqrestore(&cp->lock, intr_flags);
742 netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
743 return NETDEV_TX_BUSY;
747 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
748 mss = skb_shinfo(skb)->gso_size;
751 WARN_ONCE(1, "Net bug: GSO size %d too large for 8139CP\n",
756 opts2 = cpu_to_le32(cp_tx_vlan_tag(skb));
759 opts1 |= LargeSend | (mss << MSSShift);
760 else if (skb->ip_summed == CHECKSUM_PARTIAL) {
761 const struct iphdr *ip = ip_hdr(skb);
762 if (ip->protocol == IPPROTO_TCP)
763 opts1 |= IPCS | TCPCS;
764 else if (ip->protocol == IPPROTO_UDP)
765 opts1 |= IPCS | UDPCS;
768 "Net bug: asked to checksum invalid Legacy IP packet\n");
773 if (skb_shinfo(skb)->nr_frags == 0) {
774 struct cp_desc *txd = &cp->tx_ring[entry];
779 mapping = dma_map_single(&cp->pdev->dev, skb->data, len, PCI_DMA_TODEVICE);
780 if (dma_mapping_error(&cp->pdev->dev, mapping))
784 txd->addr = cpu_to_le64(mapping);
787 opts1 |= eor | len | FirstFrag | LastFrag;
789 txd->opts1 = cpu_to_le32(opts1);
792 cp->tx_skb[entry] = skb;
793 cp->tx_opts[entry] = opts1;
794 netif_dbg(cp, tx_queued, cp->dev, "tx queued, slot %d, skblen %d\n",
798 u32 first_len, first_eor, ctrl;
799 dma_addr_t first_mapping;
800 int frag, first_entry = entry;
802 /* We must give this initial chunk to the device last.
803 * Otherwise we could race with the device.
806 first_len = skb_headlen(skb);
807 first_mapping = dma_map_single(&cp->pdev->dev, skb->data,
808 first_len, PCI_DMA_TODEVICE);
809 if (dma_mapping_error(&cp->pdev->dev, first_mapping))
812 cp->tx_skb[entry] = skb;
814 for (frag = 0; frag < skb_shinfo(skb)->nr_frags; frag++) {
815 const skb_frag_t *this_frag = &skb_shinfo(skb)->frags[frag];
819 entry = NEXT_TX(entry);
821 len = skb_frag_size(this_frag);
822 mapping = dma_map_single(&cp->pdev->dev,
823 skb_frag_address(this_frag),
824 len, PCI_DMA_TODEVICE);
825 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
826 unwind_tx_frag_mapping(cp, skb, first_entry, entry);
830 eor = (entry == (CP_TX_RING_SIZE - 1)) ? RingEnd : 0;
832 ctrl = opts1 | eor | len;
834 if (frag == skb_shinfo(skb)->nr_frags - 1)
837 txd = &cp->tx_ring[entry];
839 txd->addr = cpu_to_le64(mapping);
842 txd->opts1 = cpu_to_le32(ctrl);
845 cp->tx_opts[entry] = ctrl;
846 cp->tx_skb[entry] = skb;
849 txd = &cp->tx_ring[first_entry];
851 txd->addr = cpu_to_le64(first_mapping);
854 ctrl = opts1 | first_eor | first_len | FirstFrag;
855 txd->opts1 = cpu_to_le32(ctrl);
858 cp->tx_opts[first_entry] = ctrl;
859 netif_dbg(cp, tx_queued, cp->dev, "tx queued, slots %d-%d, skblen %d\n",
860 first_entry, entry, skb->len);
862 cp->tx_head = NEXT_TX(entry);
864 netdev_sent_queue(dev, skb->len);
865 if (TX_BUFFS_AVAIL(cp) <= (MAX_SKB_FRAGS + 1))
866 netif_stop_queue(dev);
869 spin_unlock_irqrestore(&cp->lock, intr_flags);
871 cpw8(TxPoll, NormalTxPoll);
875 dev_kfree_skb_any(skb);
876 cp->dev->stats.tx_dropped++;
880 /* Set or clear the multicast filter for this adaptor.
881 This routine is not state sensitive and need not be SMP locked. */
883 static void __cp_set_rx_mode (struct net_device *dev)
885 struct cp_private *cp = netdev_priv(dev);
886 u32 mc_filter[2]; /* Multicast hash filter */
889 /* Note: do not reorder, GCC is clever about common statements. */
890 if (dev->flags & IFF_PROMISC) {
891 /* Unconditionally log net taps. */
893 AcceptBroadcast | AcceptMulticast | AcceptMyPhys |
895 mc_filter[1] = mc_filter[0] = 0xffffffff;
896 } else if ((netdev_mc_count(dev) > multicast_filter_limit) ||
897 (dev->flags & IFF_ALLMULTI)) {
898 /* Too many to filter perfectly -- accept all multicasts. */
899 rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
900 mc_filter[1] = mc_filter[0] = 0xffffffff;
902 struct netdev_hw_addr *ha;
903 rx_mode = AcceptBroadcast | AcceptMyPhys;
904 mc_filter[1] = mc_filter[0] = 0;
905 netdev_for_each_mc_addr(ha, dev) {
906 int bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
908 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
909 rx_mode |= AcceptMulticast;
913 /* We can safely update without stopping the chip. */
914 cp->rx_config = cp_rx_config | rx_mode;
915 cpw32_f(RxConfig, cp->rx_config);
917 cpw32_f (MAR0 + 0, mc_filter[0]);
918 cpw32_f (MAR0 + 4, mc_filter[1]);
921 static void cp_set_rx_mode (struct net_device *dev)
924 struct cp_private *cp = netdev_priv(dev);
926 spin_lock_irqsave (&cp->lock, flags);
927 __cp_set_rx_mode(dev);
928 spin_unlock_irqrestore (&cp->lock, flags);
931 static void __cp_get_stats(struct cp_private *cp)
933 /* only lower 24 bits valid; write any value to clear */
934 cp->dev->stats.rx_missed_errors += (cpr32 (RxMissed) & 0xffffff);
938 static struct net_device_stats *cp_get_stats(struct net_device *dev)
940 struct cp_private *cp = netdev_priv(dev);
943 /* The chip only need report frame silently dropped. */
944 spin_lock_irqsave(&cp->lock, flags);
945 if (netif_running(dev) && netif_device_present(dev))
947 spin_unlock_irqrestore(&cp->lock, flags);
952 static void cp_stop_hw (struct cp_private *cp)
954 cpw16(IntrStatus, ~(cpr16(IntrStatus)));
955 cpw16_f(IntrMask, 0);
958 cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));
961 cp->tx_head = cp->tx_tail = 0;
963 netdev_reset_queue(cp->dev);
966 static void cp_reset_hw (struct cp_private *cp)
968 unsigned work = 1000;
973 if (!(cpr8(Cmd) & CmdReset))
976 schedule_timeout_uninterruptible(10);
979 netdev_err(cp->dev, "hardware reset timeout\n");
982 static inline void cp_start_hw (struct cp_private *cp)
986 cpw16(CpCmd, cp->cpcmd);
989 * These (at least TxRingAddr) need to be configured after the
990 * corresponding bits in CpCmd are enabled. Datasheet v1.6 §6.33
991 * (C+ Command Register) recommends that these and more be configured
992 * *after* the [RT]xEnable bits in CpCmd are set. And on some hardware
993 * it's been observed that the TxRingAddr is actually reset to garbage
994 * when C+ mode Tx is enabled in CpCmd.
996 cpw32_f(HiTxRingAddr, 0);
997 cpw32_f(HiTxRingAddr + 4, 0);
999 ring_dma = cp->ring_dma;
1000 cpw32_f(RxRingAddr, ring_dma & 0xffffffff);
1001 cpw32_f(RxRingAddr + 4, (ring_dma >> 16) >> 16);
1003 ring_dma += sizeof(struct cp_desc) * CP_RX_RING_SIZE;
1004 cpw32_f(TxRingAddr, ring_dma & 0xffffffff);
1005 cpw32_f(TxRingAddr + 4, (ring_dma >> 16) >> 16);
1008 * Strictly speaking, the datasheet says this should be enabled
1009 * *before* setting the descriptor addresses. But what, then, would
1010 * prevent it from doing DMA to random unconfigured addresses?
1011 * This variant appears to work fine.
1013 cpw8(Cmd, RxOn | TxOn);
1015 netdev_reset_queue(cp->dev);
1018 static void cp_enable_irq(struct cp_private *cp)
1020 cpw16_f(IntrMask, cp_intr_mask);
1023 static void cp_init_hw (struct cp_private *cp)
1025 struct net_device *dev = cp->dev;
1029 cpw8_f (Cfg9346, Cfg9346_Unlock);
1031 /* Restore our idea of the MAC address. */
1032 cpw32_f (MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1033 cpw32_f (MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1036 cpw8(TxThresh, 0x06); /* XXX convert magic num to a constant */
1038 __cp_set_rx_mode(dev);
1039 cpw32_f (TxConfig, IFG | (TX_DMA_BURST << TxDMAShift));
1041 cpw8(Config1, cpr8(Config1) | DriverLoaded | PMEnable);
1042 /* Disable Wake-on-LAN. Can be turned on with ETHTOOL_SWOL */
1043 cpw8(Config3, PARMEnable);
1044 cp->wol_enabled = 0;
1046 cpw8(Config5, cpr8(Config5) & PMEStatus);
1048 cpw16(MultiIntr, 0);
1050 cpw8_f(Cfg9346, Cfg9346_Lock);
1053 static int cp_refill_rx(struct cp_private *cp)
1055 struct net_device *dev = cp->dev;
1058 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1059 struct sk_buff *skb;
1062 skb = netdev_alloc_skb_ip_align(dev, cp->rx_buf_sz);
1066 mapping = dma_map_single(&cp->pdev->dev, skb->data,
1067 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1068 if (dma_mapping_error(&cp->pdev->dev, mapping)) {
1072 cp->rx_skb[i] = skb;
1074 cp->rx_ring[i].opts2 = 0;
1075 cp->rx_ring[i].addr = cpu_to_le64(mapping);
1076 if (i == (CP_RX_RING_SIZE - 1))
1077 cp->rx_ring[i].opts1 =
1078 cpu_to_le32(DescOwn | RingEnd | cp->rx_buf_sz);
1080 cp->rx_ring[i].opts1 =
1081 cpu_to_le32(DescOwn | cp->rx_buf_sz);
1091 static void cp_init_rings_index (struct cp_private *cp)
1094 cp->tx_head = cp->tx_tail = 0;
1097 static int cp_init_rings (struct cp_private *cp)
1099 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1100 cp->tx_ring[CP_TX_RING_SIZE - 1].opts1 = cpu_to_le32(RingEnd);
1101 memset(cp->tx_opts, 0, sizeof(cp->tx_opts));
1103 cp_init_rings_index(cp);
1105 return cp_refill_rx (cp);
1108 static int cp_alloc_rings (struct cp_private *cp)
1110 struct device *d = &cp->pdev->dev;
1114 mem = dma_alloc_coherent(d, CP_RING_BYTES, &cp->ring_dma, GFP_KERNEL);
1119 cp->tx_ring = &cp->rx_ring[CP_RX_RING_SIZE];
1121 rc = cp_init_rings(cp);
1123 dma_free_coherent(d, CP_RING_BYTES, cp->rx_ring, cp->ring_dma);
1128 static void cp_clean_rings (struct cp_private *cp)
1130 struct cp_desc *desc;
1133 for (i = 0; i < CP_RX_RING_SIZE; i++) {
1134 if (cp->rx_skb[i]) {
1135 desc = cp->rx_ring + i;
1136 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1137 cp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1138 dev_kfree_skb_any(cp->rx_skb[i]);
1142 for (i = 0; i < CP_TX_RING_SIZE; i++) {
1143 if (cp->tx_skb[i]) {
1144 struct sk_buff *skb = cp->tx_skb[i];
1146 desc = cp->tx_ring + i;
1147 dma_unmap_single(&cp->pdev->dev,le64_to_cpu(desc->addr),
1148 le32_to_cpu(desc->opts1) & 0xffff,
1150 if (le32_to_cpu(desc->opts1) & LastFrag)
1151 dev_kfree_skb_any(skb);
1152 cp->dev->stats.tx_dropped++;
1155 netdev_reset_queue(cp->dev);
1157 memset(cp->rx_ring, 0, sizeof(struct cp_desc) * CP_RX_RING_SIZE);
1158 memset(cp->tx_ring, 0, sizeof(struct cp_desc) * CP_TX_RING_SIZE);
1159 memset(cp->tx_opts, 0, sizeof(cp->tx_opts));
1161 memset(cp->rx_skb, 0, sizeof(struct sk_buff *) * CP_RX_RING_SIZE);
1162 memset(cp->tx_skb, 0, sizeof(struct sk_buff *) * CP_TX_RING_SIZE);
1165 static void cp_free_rings (struct cp_private *cp)
1168 dma_free_coherent(&cp->pdev->dev, CP_RING_BYTES, cp->rx_ring,
1174 static int cp_open (struct net_device *dev)
1176 struct cp_private *cp = netdev_priv(dev);
1177 const int irq = cp->pdev->irq;
1180 netif_dbg(cp, ifup, dev, "enabling interface\n");
1182 rc = cp_alloc_rings(cp);
1186 napi_enable(&cp->napi);
1190 rc = request_irq(irq, cp_interrupt, IRQF_SHARED, dev->name, dev);
1196 netif_carrier_off(dev);
1197 mii_check_media(&cp->mii_if, netif_msg_link(cp), true);
1198 netif_start_queue(dev);
1203 napi_disable(&cp->napi);
1209 static int cp_close (struct net_device *dev)
1211 struct cp_private *cp = netdev_priv(dev);
1212 unsigned long flags;
1214 napi_disable(&cp->napi);
1216 netif_dbg(cp, ifdown, dev, "disabling interface\n");
1218 spin_lock_irqsave(&cp->lock, flags);
1220 netif_stop_queue(dev);
1221 netif_carrier_off(dev);
1225 spin_unlock_irqrestore(&cp->lock, flags);
1227 free_irq(cp->pdev->irq, dev);
1233 static void cp_tx_timeout(struct net_device *dev)
1235 struct cp_private *cp = netdev_priv(dev);
1236 unsigned long flags;
1239 netdev_warn(dev, "Transmit timeout, status %2x %4x %4x %4x\n",
1240 cpr8(Cmd), cpr16(CpCmd),
1241 cpr16(IntrStatus), cpr16(IntrMask));
1243 spin_lock_irqsave(&cp->lock, flags);
1245 netif_dbg(cp, tx_err, cp->dev, "TX ring head %d tail %d desc %x\n",
1246 cp->tx_head, cp->tx_tail, cpr16(TxDmaOkLowDesc));
1247 for (i = 0; i < CP_TX_RING_SIZE; i++) {
1248 netif_dbg(cp, tx_err, cp->dev,
1249 "TX slot %d @%p: %08x (%08x) %08x %llx %p\n",
1250 i, &cp->tx_ring[i], le32_to_cpu(cp->tx_ring[i].opts1),
1251 cp->tx_opts[i], le32_to_cpu(cp->tx_ring[i].opts2),
1252 le64_to_cpu(cp->tx_ring[i].addr),
1258 rc = cp_init_rings(cp);
1260 __cp_set_rx_mode(dev);
1261 cpw16_f(IntrMask, cp_norx_intr_mask);
1263 netif_wake_queue(dev);
1264 napi_schedule_irqoff(&cp->napi);
1266 spin_unlock_irqrestore(&cp->lock, flags);
1269 static int cp_change_mtu(struct net_device *dev, int new_mtu)
1271 struct cp_private *cp = netdev_priv(dev);
1273 /* if network interface not up, no need for complexity */
1274 if (!netif_running(dev)) {
1276 cp_set_rxbufsize(cp); /* set new rx buf size */
1280 /* network IS up, close it, reset MTU, and come up again. */
1283 cp_set_rxbufsize(cp);
1284 return cp_open(dev);
1287 static const char mii_2_8139_map[8] = {
1298 static int mdio_read(struct net_device *dev, int phy_id, int location)
1300 struct cp_private *cp = netdev_priv(dev);
1302 return location < 8 && mii_2_8139_map[location] ?
1303 readw(cp->regs + mii_2_8139_map[location]) : 0;
1307 static void mdio_write(struct net_device *dev, int phy_id, int location,
1310 struct cp_private *cp = netdev_priv(dev);
1312 if (location == 0) {
1313 cpw8(Cfg9346, Cfg9346_Unlock);
1314 cpw16(BasicModeCtrl, value);
1315 cpw8(Cfg9346, Cfg9346_Lock);
1316 } else if (location < 8 && mii_2_8139_map[location])
1317 cpw16(mii_2_8139_map[location], value);
1320 /* Set the ethtool Wake-on-LAN settings */
1321 static int netdev_set_wol (struct cp_private *cp,
1322 const struct ethtool_wolinfo *wol)
1326 options = cpr8 (Config3) & ~(LinkUp | MagicPacket);
1327 /* If WOL is being disabled, no need for complexity */
1329 if (wol->wolopts & WAKE_PHY) options |= LinkUp;
1330 if (wol->wolopts & WAKE_MAGIC) options |= MagicPacket;
1333 cpw8 (Cfg9346, Cfg9346_Unlock);
1334 cpw8 (Config3, options);
1335 cpw8 (Cfg9346, Cfg9346_Lock);
1337 options = 0; /* Paranoia setting */
1338 options = cpr8 (Config5) & ~(UWF | MWF | BWF);
1339 /* If WOL is being disabled, no need for complexity */
1341 if (wol->wolopts & WAKE_UCAST) options |= UWF;
1342 if (wol->wolopts & WAKE_BCAST) options |= BWF;
1343 if (wol->wolopts & WAKE_MCAST) options |= MWF;
1346 cpw8 (Config5, options);
1348 cp->wol_enabled = (wol->wolopts) ? 1 : 0;
1353 /* Get the ethtool Wake-on-LAN settings */
1354 static void netdev_get_wol (struct cp_private *cp,
1355 struct ethtool_wolinfo *wol)
1359 wol->wolopts = 0; /* Start from scratch */
1360 wol->supported = WAKE_PHY | WAKE_BCAST | WAKE_MAGIC |
1361 WAKE_MCAST | WAKE_UCAST;
1362 /* We don't need to go on if WOL is disabled */
1363 if (!cp->wol_enabled) return;
1365 options = cpr8 (Config3);
1366 if (options & LinkUp) wol->wolopts |= WAKE_PHY;
1367 if (options & MagicPacket) wol->wolopts |= WAKE_MAGIC;
1369 options = 0; /* Paranoia setting */
1370 options = cpr8 (Config5);
1371 if (options & UWF) wol->wolopts |= WAKE_UCAST;
1372 if (options & BWF) wol->wolopts |= WAKE_BCAST;
1373 if (options & MWF) wol->wolopts |= WAKE_MCAST;
1376 static void cp_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1378 struct cp_private *cp = netdev_priv(dev);
1380 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
1381 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
1382 strlcpy(info->bus_info, pci_name(cp->pdev), sizeof(info->bus_info));
1385 static void cp_get_ringparam(struct net_device *dev,
1386 struct ethtool_ringparam *ring)
1388 ring->rx_max_pending = CP_RX_RING_SIZE;
1389 ring->tx_max_pending = CP_TX_RING_SIZE;
1390 ring->rx_pending = CP_RX_RING_SIZE;
1391 ring->tx_pending = CP_TX_RING_SIZE;
1394 static int cp_get_regs_len(struct net_device *dev)
1396 return CP_REGS_SIZE;
1399 static int cp_get_sset_count (struct net_device *dev, int sset)
1403 return CP_NUM_STATS;
1409 static int cp_get_link_ksettings(struct net_device *dev,
1410 struct ethtool_link_ksettings *cmd)
1412 struct cp_private *cp = netdev_priv(dev);
1413 unsigned long flags;
1415 spin_lock_irqsave(&cp->lock, flags);
1416 mii_ethtool_get_link_ksettings(&cp->mii_if, cmd);
1417 spin_unlock_irqrestore(&cp->lock, flags);
1422 static int cp_set_link_ksettings(struct net_device *dev,
1423 const struct ethtool_link_ksettings *cmd)
1425 struct cp_private *cp = netdev_priv(dev);
1427 unsigned long flags;
1429 spin_lock_irqsave(&cp->lock, flags);
1430 rc = mii_ethtool_set_link_ksettings(&cp->mii_if, cmd);
1431 spin_unlock_irqrestore(&cp->lock, flags);
1436 static int cp_nway_reset(struct net_device *dev)
1438 struct cp_private *cp = netdev_priv(dev);
1439 return mii_nway_restart(&cp->mii_if);
1442 static u32 cp_get_msglevel(struct net_device *dev)
1444 struct cp_private *cp = netdev_priv(dev);
1445 return cp->msg_enable;
1448 static void cp_set_msglevel(struct net_device *dev, u32 value)
1450 struct cp_private *cp = netdev_priv(dev);
1451 cp->msg_enable = value;
1454 static int cp_set_features(struct net_device *dev, netdev_features_t features)
1456 struct cp_private *cp = netdev_priv(dev);
1457 unsigned long flags;
1459 if (!((dev->features ^ features) & NETIF_F_RXCSUM))
1462 spin_lock_irqsave(&cp->lock, flags);
1464 if (features & NETIF_F_RXCSUM)
1465 cp->cpcmd |= RxChkSum;
1467 cp->cpcmd &= ~RxChkSum;
1469 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1470 cp->cpcmd |= RxVlanOn;
1472 cp->cpcmd &= ~RxVlanOn;
1474 cpw16_f(CpCmd, cp->cpcmd);
1475 spin_unlock_irqrestore(&cp->lock, flags);
1480 static void cp_get_regs(struct net_device *dev, struct ethtool_regs *regs,
1483 struct cp_private *cp = netdev_priv(dev);
1484 unsigned long flags;
1486 if (regs->len < CP_REGS_SIZE)
1487 return /* -EINVAL */;
1489 regs->version = CP_REGS_VER;
1491 spin_lock_irqsave(&cp->lock, flags);
1492 memcpy_fromio(p, cp->regs, CP_REGS_SIZE);
1493 spin_unlock_irqrestore(&cp->lock, flags);
1496 static void cp_get_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1498 struct cp_private *cp = netdev_priv(dev);
1499 unsigned long flags;
1501 spin_lock_irqsave (&cp->lock, flags);
1502 netdev_get_wol (cp, wol);
1503 spin_unlock_irqrestore (&cp->lock, flags);
1506 static int cp_set_wol (struct net_device *dev, struct ethtool_wolinfo *wol)
1508 struct cp_private *cp = netdev_priv(dev);
1509 unsigned long flags;
1512 spin_lock_irqsave (&cp->lock, flags);
1513 rc = netdev_set_wol (cp, wol);
1514 spin_unlock_irqrestore (&cp->lock, flags);
1519 static void cp_get_strings (struct net_device *dev, u32 stringset, u8 *buf)
1521 switch (stringset) {
1523 memcpy(buf, ðtool_stats_keys, sizeof(ethtool_stats_keys));
1531 static void cp_get_ethtool_stats (struct net_device *dev,
1532 struct ethtool_stats *estats, u64 *tmp_stats)
1534 struct cp_private *cp = netdev_priv(dev);
1535 struct cp_dma_stats *nic_stats;
1539 nic_stats = dma_alloc_coherent(&cp->pdev->dev, sizeof(*nic_stats),
1544 /* begin NIC statistics dump */
1545 cpw32(StatsAddr + 4, (u64)dma >> 32);
1546 cpw32(StatsAddr, ((u64)dma & DMA_BIT_MASK(32)) | DumpStats);
1549 for (i = 0; i < 1000; i++) {
1550 if ((cpr32(StatsAddr) & DumpStats) == 0)
1554 cpw32(StatsAddr, 0);
1555 cpw32(StatsAddr + 4, 0);
1559 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_ok);
1560 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok);
1561 tmp_stats[i++] = le64_to_cpu(nic_stats->tx_err);
1562 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_err);
1563 tmp_stats[i++] = le16_to_cpu(nic_stats->rx_fifo);
1564 tmp_stats[i++] = le16_to_cpu(nic_stats->frame_align);
1565 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_1col);
1566 tmp_stats[i++] = le32_to_cpu(nic_stats->tx_ok_mcol);
1567 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_phys);
1568 tmp_stats[i++] = le64_to_cpu(nic_stats->rx_ok_bcast);
1569 tmp_stats[i++] = le32_to_cpu(nic_stats->rx_ok_mcast);
1570 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_abort);
1571 tmp_stats[i++] = le16_to_cpu(nic_stats->tx_underrun);
1572 tmp_stats[i++] = cp->cp_stats.rx_frags;
1573 BUG_ON(i != CP_NUM_STATS);
1575 dma_free_coherent(&cp->pdev->dev, sizeof(*nic_stats), nic_stats, dma);
1578 static const struct ethtool_ops cp_ethtool_ops = {
1579 .get_drvinfo = cp_get_drvinfo,
1580 .get_regs_len = cp_get_regs_len,
1581 .get_sset_count = cp_get_sset_count,
1582 .nway_reset = cp_nway_reset,
1583 .get_link = ethtool_op_get_link,
1584 .get_msglevel = cp_get_msglevel,
1585 .set_msglevel = cp_set_msglevel,
1586 .get_regs = cp_get_regs,
1587 .get_wol = cp_get_wol,
1588 .set_wol = cp_set_wol,
1589 .get_strings = cp_get_strings,
1590 .get_ethtool_stats = cp_get_ethtool_stats,
1591 .get_eeprom_len = cp_get_eeprom_len,
1592 .get_eeprom = cp_get_eeprom,
1593 .set_eeprom = cp_set_eeprom,
1594 .get_ringparam = cp_get_ringparam,
1595 .get_link_ksettings = cp_get_link_ksettings,
1596 .set_link_ksettings = cp_set_link_ksettings,
1599 static int cp_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
1601 struct cp_private *cp = netdev_priv(dev);
1603 unsigned long flags;
1605 if (!netif_running(dev))
1608 spin_lock_irqsave(&cp->lock, flags);
1609 rc = generic_mii_ioctl(&cp->mii_if, if_mii(rq), cmd, NULL);
1610 spin_unlock_irqrestore(&cp->lock, flags);
1614 static int cp_set_mac_address(struct net_device *dev, void *p)
1616 struct cp_private *cp = netdev_priv(dev);
1617 struct sockaddr *addr = p;
1619 if (!is_valid_ether_addr(addr->sa_data))
1620 return -EADDRNOTAVAIL;
1622 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1624 spin_lock_irq(&cp->lock);
1626 cpw8_f(Cfg9346, Cfg9346_Unlock);
1627 cpw32_f(MAC0 + 0, le32_to_cpu (*(__le32 *) (dev->dev_addr + 0)));
1628 cpw32_f(MAC0 + 4, le32_to_cpu (*(__le32 *) (dev->dev_addr + 4)));
1629 cpw8_f(Cfg9346, Cfg9346_Lock);
1631 spin_unlock_irq(&cp->lock);
1636 /* Serial EEPROM section. */
1638 /* EEPROM_Ctrl bits. */
1639 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
1640 #define EE_CS 0x08 /* EEPROM chip select. */
1641 #define EE_DATA_WRITE 0x02 /* EEPROM chip data in. */
1642 #define EE_WRITE_0 0x00
1643 #define EE_WRITE_1 0x02
1644 #define EE_DATA_READ 0x01 /* EEPROM chip data out. */
1645 #define EE_ENB (0x80 | EE_CS)
1647 /* Delay between EEPROM clock transitions.
1648 No extra delay is needed with 33Mhz PCI, but 66Mhz may change this.
1651 #define eeprom_delay() readb(ee_addr)
1653 /* The EEPROM commands include the alway-set leading bit. */
1654 #define EE_EXTEND_CMD (4)
1655 #define EE_WRITE_CMD (5)
1656 #define EE_READ_CMD (6)
1657 #define EE_ERASE_CMD (7)
1659 #define EE_EWDS_ADDR (0)
1660 #define EE_WRAL_ADDR (1)
1661 #define EE_ERAL_ADDR (2)
1662 #define EE_EWEN_ADDR (3)
1664 #define CP_EEPROM_MAGIC PCI_DEVICE_ID_REALTEK_8139
1666 static void eeprom_cmd_start(void __iomem *ee_addr)
1668 writeb (EE_ENB & ~EE_CS, ee_addr);
1669 writeb (EE_ENB, ee_addr);
1673 static void eeprom_cmd(void __iomem *ee_addr, int cmd, int cmd_len)
1677 /* Shift the command bits out. */
1678 for (i = cmd_len - 1; i >= 0; i--) {
1679 int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
1680 writeb (EE_ENB | dataval, ee_addr);
1682 writeb (EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
1685 writeb (EE_ENB, ee_addr);
1689 static void eeprom_cmd_end(void __iomem *ee_addr)
1695 static void eeprom_extend_cmd(void __iomem *ee_addr, int extend_cmd,
1698 int cmd = (EE_EXTEND_CMD << addr_len) | (extend_cmd << (addr_len - 2));
1700 eeprom_cmd_start(ee_addr);
1701 eeprom_cmd(ee_addr, cmd, 3 + addr_len);
1702 eeprom_cmd_end(ee_addr);
1705 static u16 read_eeprom (void __iomem *ioaddr, int location, int addr_len)
1709 void __iomem *ee_addr = ioaddr + Cfg9346;
1710 int read_cmd = location | (EE_READ_CMD << addr_len);
1712 eeprom_cmd_start(ee_addr);
1713 eeprom_cmd(ee_addr, read_cmd, 3 + addr_len);
1715 for (i = 16; i > 0; i--) {
1716 writeb (EE_ENB | EE_SHIFT_CLK, ee_addr);
1719 (retval << 1) | ((readb (ee_addr) & EE_DATA_READ) ? 1 :
1721 writeb (EE_ENB, ee_addr);
1725 eeprom_cmd_end(ee_addr);
1730 static void write_eeprom(void __iomem *ioaddr, int location, u16 val,
1734 void __iomem *ee_addr = ioaddr + Cfg9346;
1735 int write_cmd = location | (EE_WRITE_CMD << addr_len);
1737 eeprom_extend_cmd(ee_addr, EE_EWEN_ADDR, addr_len);
1739 eeprom_cmd_start(ee_addr);
1740 eeprom_cmd(ee_addr, write_cmd, 3 + addr_len);
1741 eeprom_cmd(ee_addr, val, 16);
1742 eeprom_cmd_end(ee_addr);
1744 eeprom_cmd_start(ee_addr);
1745 for (i = 0; i < 20000; i++)
1746 if (readb(ee_addr) & EE_DATA_READ)
1748 eeprom_cmd_end(ee_addr);
1750 eeprom_extend_cmd(ee_addr, EE_EWDS_ADDR, addr_len);
1753 static int cp_get_eeprom_len(struct net_device *dev)
1755 struct cp_private *cp = netdev_priv(dev);
1758 spin_lock_irq(&cp->lock);
1759 size = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 256 : 128;
1760 spin_unlock_irq(&cp->lock);
1765 static int cp_get_eeprom(struct net_device *dev,
1766 struct ethtool_eeprom *eeprom, u8 *data)
1768 struct cp_private *cp = netdev_priv(dev);
1769 unsigned int addr_len;
1771 u32 offset = eeprom->offset >> 1;
1772 u32 len = eeprom->len;
1775 eeprom->magic = CP_EEPROM_MAGIC;
1777 spin_lock_irq(&cp->lock);
1779 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1781 if (eeprom->offset & 1) {
1782 val = read_eeprom(cp->regs, offset, addr_len);
1783 data[i++] = (u8)(val >> 8);
1787 while (i < len - 1) {
1788 val = read_eeprom(cp->regs, offset, addr_len);
1789 data[i++] = (u8)val;
1790 data[i++] = (u8)(val >> 8);
1795 val = read_eeprom(cp->regs, offset, addr_len);
1799 spin_unlock_irq(&cp->lock);
1803 static int cp_set_eeprom(struct net_device *dev,
1804 struct ethtool_eeprom *eeprom, u8 *data)
1806 struct cp_private *cp = netdev_priv(dev);
1807 unsigned int addr_len;
1809 u32 offset = eeprom->offset >> 1;
1810 u32 len = eeprom->len;
1813 if (eeprom->magic != CP_EEPROM_MAGIC)
1816 spin_lock_irq(&cp->lock);
1818 addr_len = read_eeprom(cp->regs, 0, 8) == 0x8129 ? 8 : 6;
1820 if (eeprom->offset & 1) {
1821 val = read_eeprom(cp->regs, offset, addr_len) & 0xff;
1822 val |= (u16)data[i++] << 8;
1823 write_eeprom(cp->regs, offset, val, addr_len);
1827 while (i < len - 1) {
1828 val = (u16)data[i++];
1829 val |= (u16)data[i++] << 8;
1830 write_eeprom(cp->regs, offset, val, addr_len);
1835 val = read_eeprom(cp->regs, offset, addr_len) & 0xff00;
1836 val |= (u16)data[i];
1837 write_eeprom(cp->regs, offset, val, addr_len);
1840 spin_unlock_irq(&cp->lock);
1844 /* Put the board into D3cold state and wait for WakeUp signal */
1845 static void cp_set_d3_state (struct cp_private *cp)
1847 pci_enable_wake(cp->pdev, PCI_D0, 1); /* Enable PME# generation */
1848 pci_set_power_state (cp->pdev, PCI_D3hot);
1851 static netdev_features_t cp_features_check(struct sk_buff *skb,
1852 struct net_device *dev,
1853 netdev_features_t features)
1855 if (skb_shinfo(skb)->gso_size > MSSMask)
1856 features &= ~NETIF_F_TSO;
1858 return vlan_features_check(skb, features);
1860 static const struct net_device_ops cp_netdev_ops = {
1861 .ndo_open = cp_open,
1862 .ndo_stop = cp_close,
1863 .ndo_validate_addr = eth_validate_addr,
1864 .ndo_set_mac_address = cp_set_mac_address,
1865 .ndo_set_rx_mode = cp_set_rx_mode,
1866 .ndo_get_stats = cp_get_stats,
1867 .ndo_do_ioctl = cp_ioctl,
1868 .ndo_start_xmit = cp_start_xmit,
1869 .ndo_tx_timeout = cp_tx_timeout,
1870 .ndo_set_features = cp_set_features,
1871 .ndo_change_mtu = cp_change_mtu,
1872 .ndo_features_check = cp_features_check,
1874 #ifdef CONFIG_NET_POLL_CONTROLLER
1875 .ndo_poll_controller = cp_poll_controller,
1879 static int cp_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
1881 struct net_device *dev;
1882 struct cp_private *cp;
1885 resource_size_t pciaddr;
1886 unsigned int addr_len, i, pci_using_dac;
1888 pr_info_once("%s", version);
1890 if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
1891 pdev->device == PCI_DEVICE_ID_REALTEK_8139 && pdev->revision < 0x20) {
1892 dev_info(&pdev->dev,
1893 "This (id %04x:%04x rev %02x) is not an 8139C+ compatible chip, use 8139too\n",
1894 pdev->vendor, pdev->device, pdev->revision);
1898 dev = alloc_etherdev(sizeof(struct cp_private));
1901 SET_NETDEV_DEV(dev, &pdev->dev);
1903 cp = netdev_priv(dev);
1906 cp->msg_enable = (debug < 0 ? CP_DEF_MSG_ENABLE : debug);
1907 spin_lock_init (&cp->lock);
1908 cp->mii_if.dev = dev;
1909 cp->mii_if.mdio_read = mdio_read;
1910 cp->mii_if.mdio_write = mdio_write;
1911 cp->mii_if.phy_id = CP_INTERNAL_PHY;
1912 cp->mii_if.phy_id_mask = 0x1f;
1913 cp->mii_if.reg_num_mask = 0x1f;
1914 cp_set_rxbufsize(cp);
1916 rc = pci_enable_device(pdev);
1920 rc = pci_set_mwi(pdev);
1922 goto err_out_disable;
1924 rc = pci_request_regions(pdev, DRV_NAME);
1928 pciaddr = pci_resource_start(pdev, 1);
1931 dev_err(&pdev->dev, "no MMIO resource\n");
1934 if (pci_resource_len(pdev, 1) < CP_REGS_SIZE) {
1936 dev_err(&pdev->dev, "MMIO resource (%llx) too small\n",
1937 (unsigned long long)pci_resource_len(pdev, 1));
1941 /* Configure DMA attributes. */
1942 if ((sizeof(dma_addr_t) > 4) &&
1943 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)) &&
1944 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
1949 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1952 "No usable DMA configuration, aborting\n");
1955 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1958 "No usable consistent DMA configuration, aborting\n");
1963 cp->cpcmd = (pci_using_dac ? PCIDAC : 0) |
1964 PCIMulRW | RxChkSum | CpRxOn | CpTxOn;
1966 dev->features |= NETIF_F_RXCSUM;
1967 dev->hw_features |= NETIF_F_RXCSUM;
1969 regs = ioremap(pciaddr, CP_REGS_SIZE);
1972 dev_err(&pdev->dev, "Cannot map PCI MMIO (%Lx@%Lx)\n",
1973 (unsigned long long)pci_resource_len(pdev, 1),
1974 (unsigned long long)pciaddr);
1981 /* read MAC address from EEPROM */
1982 addr_len = read_eeprom (regs, 0, 8) == 0x8129 ? 8 : 6;
1983 for (i = 0; i < 3; i++)
1984 ((__le16 *) (dev->dev_addr))[i] =
1985 cpu_to_le16(read_eeprom (regs, i + 7, addr_len));
1987 dev->netdev_ops = &cp_netdev_ops;
1988 netif_napi_add(dev, &cp->napi, cp_rx_poll, 16);
1989 dev->ethtool_ops = &cp_ethtool_ops;
1990 dev->watchdog_timeo = TX_TIMEOUT;
1992 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1993 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
1996 dev->features |= NETIF_F_HIGHDMA;
1998 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
1999 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
2000 dev->vlan_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO |
2003 /* MTU range: 60 - 4096 */
2004 dev->min_mtu = CP_MIN_MTU;
2005 dev->max_mtu = CP_MAX_MTU;
2007 rc = register_netdev(dev);
2011 netdev_info(dev, "RTL-8139C+ at 0x%p, %pM, IRQ %d\n",
2012 regs, dev->dev_addr, pdev->irq);
2014 pci_set_drvdata(pdev, dev);
2016 /* enable busmastering and memory-write-invalidate */
2017 pci_set_master(pdev);
2019 if (cp->wol_enabled)
2020 cp_set_d3_state (cp);
2027 pci_release_regions(pdev);
2029 pci_clear_mwi(pdev);
2031 pci_disable_device(pdev);
2037 static void cp_remove_one (struct pci_dev *pdev)
2039 struct net_device *dev = pci_get_drvdata(pdev);
2040 struct cp_private *cp = netdev_priv(dev);
2042 unregister_netdev(dev);
2044 if (cp->wol_enabled)
2045 pci_set_power_state (pdev, PCI_D0);
2046 pci_release_regions(pdev);
2047 pci_clear_mwi(pdev);
2048 pci_disable_device(pdev);
2053 static int cp_suspend (struct pci_dev *pdev, pm_message_t state)
2055 struct net_device *dev = pci_get_drvdata(pdev);
2056 struct cp_private *cp = netdev_priv(dev);
2057 unsigned long flags;
2059 if (!netif_running(dev))
2062 netif_device_detach (dev);
2063 netif_stop_queue (dev);
2065 spin_lock_irqsave (&cp->lock, flags);
2067 /* Disable Rx and Tx */
2068 cpw16 (IntrMask, 0);
2069 cpw8 (Cmd, cpr8 (Cmd) & (~RxOn | ~TxOn));
2071 spin_unlock_irqrestore (&cp->lock, flags);
2073 pci_save_state(pdev);
2074 pci_enable_wake(pdev, pci_choose_state(pdev, state), cp->wol_enabled);
2075 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2080 static int cp_resume (struct pci_dev *pdev)
2082 struct net_device *dev = pci_get_drvdata (pdev);
2083 struct cp_private *cp = netdev_priv(dev);
2084 unsigned long flags;
2086 if (!netif_running(dev))
2089 netif_device_attach (dev);
2091 pci_set_power_state(pdev, PCI_D0);
2092 pci_restore_state(pdev);
2093 pci_enable_wake(pdev, PCI_D0, 0);
2095 /* FIXME: sh*t may happen if the Rx ring buffer is depleted */
2096 cp_init_rings_index (cp);
2099 netif_start_queue (dev);
2101 spin_lock_irqsave (&cp->lock, flags);
2103 mii_check_media(&cp->mii_if, netif_msg_link(cp), false);
2105 spin_unlock_irqrestore (&cp->lock, flags);
2109 #endif /* CONFIG_PM */
2111 static const struct pci_device_id cp_pci_tbl[] = {
2112 { PCI_DEVICE(PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139), },
2113 { PCI_DEVICE(PCI_VENDOR_ID_TTTECH, PCI_DEVICE_ID_TTTECH_MC322), },
2116 MODULE_DEVICE_TABLE(pci, cp_pci_tbl);
2118 static struct pci_driver cp_driver = {
2120 .id_table = cp_pci_tbl,
2121 .probe = cp_init_one,
2122 .remove = cp_remove_one,
2124 .resume = cp_resume,
2125 .suspend = cp_suspend,
2129 module_pci_driver(cp_driver);