1 /* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */
3 Written/copyright 1997-2001 by Donald Becker.
5 This software may be used and distributed according to the terms of
6 the GNU General Public License (GPL), incorporated herein by reference.
7 Drivers based on or derived from this code fall under the GPL and must
8 retain the authorship, copyright and license notice. This file is not
9 a complete program and may only be used when the entire operating
10 system is licensed under the GPL.
12 This driver is for the SMC83c170/175 "EPIC" series, as used on the
13 SMC EtherPower II 9432 PCI adapter, and several CardBus cards.
15 The author may be reached as becker@scyld.com, or C/O
16 Scyld Computing Corporation
17 410 Severn Ave., Suite 210
20 Information and updates available at
21 http://www.scyld.com/network/epic100.html
22 [this link no longer provides anything useful -jgarzik]
24 ---------------------------------------------------------------------
28 #define DRV_NAME "epic100"
29 #define DRV_VERSION "2.1"
30 #define DRV_RELDATE "Sept 11, 2006"
32 /* The user-configurable values.
33 These may be modified when a driver module is loaded.*/
35 static int debug
= 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
37 /* Used to pass the full-duplex flag, etc. */
38 #define MAX_UNITS 8 /* More are supported, limit only on options */
39 static int options
[MAX_UNITS
] = {-1, -1, -1, -1, -1, -1, -1, -1};
40 static int full_duplex
[MAX_UNITS
] = {-1, -1, -1, -1, -1, -1, -1, -1};
42 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
43 Setting to > 1518 effectively disables this feature. */
44 static int rx_copybreak
;
46 /* Operational parameters that are set at compile time. */
48 /* Keep the ring sizes a power of two for operational efficiency.
49 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
50 Making the Tx ring too large decreases the effectiveness of channel
51 bonding and packet priority.
52 There are no ill effects from too-large receive rings. */
53 #define TX_RING_SIZE 256
54 #define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */
55 #define RX_RING_SIZE 256
56 #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc)
57 #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc)
59 /* Operational parameters that usually are not changed. */
60 /* Time in jiffies before concluding the transmitter is hung. */
61 #define TX_TIMEOUT (2*HZ)
63 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
65 /* Bytes transferred to chip before transmission starts. */
66 /* Initial threshold, increased on underflow, rounded down to 4 byte units. */
67 #define TX_FIFO_THRESH 256
68 #define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */
70 #include <linux/module.h>
71 #include <linux/kernel.h>
72 #include <linux/string.h>
73 #include <linux/timer.h>
74 #include <linux/errno.h>
75 #include <linux/ioport.h>
76 #include <linux/interrupt.h>
77 #include <linux/pci.h>
78 #include <linux/delay.h>
79 #include <linux/netdevice.h>
80 #include <linux/etherdevice.h>
81 #include <linux/skbuff.h>
82 #include <linux/init.h>
83 #include <linux/spinlock.h>
84 #include <linux/ethtool.h>
85 #include <linux/mii.h>
86 #include <linux/crc32.h>
87 #include <linux/bitops.h>
89 #include <linux/uaccess.h>
90 #include <asm/byteorder.h>
92 /* These identify the driver base version and may not be removed. */
93 static char version
[] =
94 DRV_NAME
".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>";
95 static char version2
[] =
96 " (unofficial 2.4.x kernel port, version " DRV_VERSION
", " DRV_RELDATE
")";
98 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
99 MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver");
100 MODULE_LICENSE("GPL");
102 module_param(debug
, int, 0);
103 module_param(rx_copybreak
, int, 0);
104 module_param_array(options
, int, NULL
, 0);
105 module_param_array(full_duplex
, int, NULL
, 0);
106 MODULE_PARM_DESC(debug
, "EPIC/100 debug level (0-5)");
107 MODULE_PARM_DESC(options
, "EPIC/100: Bits 0-3: media type, bit 4: full duplex");
108 MODULE_PARM_DESC(rx_copybreak
, "EPIC/100 copy breakpoint for copy-only-tiny-frames");
109 MODULE_PARM_DESC(full_duplex
, "EPIC/100 full duplex setting(s) (1)");
114 I. Board Compatibility
116 This device driver is designed for the SMC "EPIC/100", the SMC
117 single-chip Ethernet controllers for PCI. This chip is used on
118 the SMC EtherPower II boards.
120 II. Board-specific settings
122 PCI bus devices are configured by the system at boot time, so no jumpers
123 need to be set on the board. The system BIOS will assign the
124 PCI INTA signal to a (preferably otherwise unused) system IRQ line.
125 Note: Kernel versions earlier than 1.3.73 do not support shared PCI
128 III. Driver operation
134 http://www.smsc.com/media/Downloads_Public/discontinued/83c171.pdf
135 http://www.smsc.com/media/Downloads_Public/discontinued/83c175.pdf
136 http://scyld.com/expert/NWay.html
137 http://www.national.com/pf/DP/DP83840A.html
144 enum chip_capability_flags
{ MII_PWRDWN
=1, TYPE2_INTR
=2, NO_MII
=4 };
146 #define EPIC_TOTAL_SIZE 0x100
162 struct epic_chip_info
{
164 int drv_flags
; /* Driver use, intended as capability flags. */
168 /* indexed by chip_t */
169 static const struct epic_chip_info pci_id_tbl
[] = {
170 { "SMSC EPIC/100 83c170", TYPE2_INTR
| NO_MII
| MII_PWRDWN
},
171 { "SMSC EPIC/100 83c170", TYPE2_INTR
},
172 { "SMSC EPIC/C 83c175", TYPE2_INTR
| MII_PWRDWN
},
176 static const struct pci_device_id epic_pci_tbl
[] = {
177 { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0
},
178 { 0x10B8, 0x0005, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, SMSC_83C170
},
179 { 0x10B8, 0x0006, PCI_ANY_ID
, PCI_ANY_ID
,
180 PCI_CLASS_NETWORK_ETHERNET
<< 8, 0xffff00, SMSC_83C175
},
183 MODULE_DEVICE_TABLE (pci
, epic_pci_tbl
);
185 #define ew16(reg, val) iowrite16(val, ioaddr + (reg))
186 #define ew32(reg, val) iowrite32(val, ioaddr + (reg))
187 #define er8(reg) ioread8(ioaddr + (reg))
188 #define er16(reg) ioread16(ioaddr + (reg))
189 #define er32(reg) ioread32(ioaddr + (reg))
191 /* Offsets to registers, using the (ugh) SMC names. */
192 enum epic_registers
{
193 COMMAND
=0, INTSTAT
=4, INTMASK
=8, GENCTL
=0x0C, NVCTL
=0x10, EECTL
=0x14,
195 TEST1
=0x1C, CRCCNT
=0x20, ALICNT
=0x24, MPCNT
=0x28, /* Rx error counters. */
196 MIICtrl
=0x30, MIIData
=0x34, MIICfg
=0x38,
197 LAN0
=64, /* MAC address. */
198 MC0
=80, /* Multicast filter table. */
199 RxCtrl
=96, TxCtrl
=112, TxSTAT
=0x74,
200 PRxCDAR
=0x84, RxSTAT
=0xA4, EarlyRx
=0xB0, PTxCDAR
=0xC4, TxThresh
=0xDC,
203 /* Interrupt register bits, using my own meaningful names. */
205 TxIdle
=0x40000, RxIdle
=0x20000, IntrSummary
=0x010000,
206 PCIBusErr170
=0x7000, PCIBusErr175
=0x1000, PhyEvent175
=0x8000,
207 RxStarted
=0x0800, RxEarlyWarn
=0x0400, CntFull
=0x0200, TxUnderrun
=0x0100,
208 TxEmpty
=0x0080, TxDone
=0x0020, RxError
=0x0010,
209 RxOverflow
=0x0008, RxFull
=0x0004, RxHeader
=0x0002, RxDone
=0x0001,
212 StopRx
=1, StartRx
=2, TxQueued
=4, RxQueued
=8,
213 StopTxDMA
=0x20, StopRxDMA
=0x40, RestartTx
=0x80,
216 #define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */
218 #define EpicNapiEvent (TxEmpty | TxDone | \
219 RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull)
220 #define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent)
222 static const u16 media2miictl
[16] = {
223 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0,
224 0, 0, 0, 0, 0, 0, 0, 0 };
227 * The EPIC100 Rx and Tx buffer descriptors. Note that these
228 * really ARE host-endian; it's not a misannotation. We tell
229 * the card to byteswap them internally on big-endian hosts -
230 * look for #ifdef __BIG_ENDIAN in epic_open().
233 struct epic_tx_desc
{
240 struct epic_rx_desc
{
247 enum desc_status_bits
{
251 #define PRIV_ALIGN 15 /* Required alignment mask */
252 struct epic_private
{
253 struct epic_rx_desc
*rx_ring
;
254 struct epic_tx_desc
*tx_ring
;
255 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
256 struct sk_buff
* tx_skbuff
[TX_RING_SIZE
];
257 /* The addresses of receive-in-place skbuffs. */
258 struct sk_buff
* rx_skbuff
[RX_RING_SIZE
];
260 dma_addr_t tx_ring_dma
;
261 dma_addr_t rx_ring_dma
;
264 spinlock_t lock
; /* Group with Tx control cache line. */
265 spinlock_t napi_lock
;
266 struct napi_struct napi
;
267 unsigned int cur_tx
, dirty_tx
;
269 unsigned int cur_rx
, dirty_rx
;
271 unsigned int rx_buf_sz
; /* Based on MTU+slack. */
273 void __iomem
*ioaddr
;
274 struct pci_dev
*pci_dev
; /* PCI bus location. */
275 int chip_id
, chip_flags
;
277 struct timer_list timer
; /* Media selection timer. */
279 unsigned char mc_filter
[8];
280 signed char phys
[4]; /* MII device addresses. */
281 u16 advertising
; /* NWay media advertisement */
283 u32 ethtool_ops_nesting
;
284 struct mii_if_info mii
;
285 unsigned int tx_full
:1; /* The Tx queue is full. */
286 unsigned int default_port
:4; /* Last dev->if_port value. */
289 static int epic_open(struct net_device
*dev
);
290 static int read_eeprom(struct epic_private
*, int);
291 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
);
292 static void mdio_write(struct net_device
*dev
, int phy_id
, int loc
, int val
);
293 static void epic_restart(struct net_device
*dev
);
294 static void epic_timer(struct timer_list
*t
);
295 static void epic_tx_timeout(struct net_device
*dev
, unsigned int txqueue
);
296 static void epic_init_ring(struct net_device
*dev
);
297 static netdev_tx_t
epic_start_xmit(struct sk_buff
*skb
,
298 struct net_device
*dev
);
299 static int epic_rx(struct net_device
*dev
, int budget
);
300 static int epic_poll(struct napi_struct
*napi
, int budget
);
301 static irqreturn_t
epic_interrupt(int irq
, void *dev_instance
);
302 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
303 static const struct ethtool_ops netdev_ethtool_ops
;
304 static int epic_close(struct net_device
*dev
);
305 static struct net_device_stats
*epic_get_stats(struct net_device
*dev
);
306 static void set_rx_mode(struct net_device
*dev
);
308 static const struct net_device_ops epic_netdev_ops
= {
309 .ndo_open
= epic_open
,
310 .ndo_stop
= epic_close
,
311 .ndo_start_xmit
= epic_start_xmit
,
312 .ndo_tx_timeout
= epic_tx_timeout
,
313 .ndo_get_stats
= epic_get_stats
,
314 .ndo_set_rx_mode
= set_rx_mode
,
315 .ndo_do_ioctl
= netdev_ioctl
,
316 .ndo_set_mac_address
= eth_mac_addr
,
317 .ndo_validate_addr
= eth_validate_addr
,
320 static int epic_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
322 static int card_idx
= -1;
323 void __iomem
*ioaddr
;
324 int chip_idx
= (int) ent
->driver_data
;
325 struct net_device
*dev
;
326 struct epic_private
*ep
;
327 int i
, ret
, option
= 0, duplex
= 0;
331 /* when built into the kernel, we only print version if device is found */
333 pr_info_once("%s%s\n", version
, version2
);
338 ret
= pci_enable_device(pdev
);
342 if (pci_resource_len(pdev
, 0) < EPIC_TOTAL_SIZE
) {
343 dev_err(&pdev
->dev
, "no PCI region space\n");
345 goto err_out_disable
;
348 pci_set_master(pdev
);
350 ret
= pci_request_regions(pdev
, DRV_NAME
);
352 goto err_out_disable
;
356 dev
= alloc_etherdev(sizeof (*ep
));
358 goto err_out_free_res
;
360 SET_NETDEV_DEV(dev
, &pdev
->dev
);
362 ioaddr
= pci_iomap(pdev
, EPIC_BAR
, 0);
364 dev_err(&pdev
->dev
, "ioremap failed\n");
365 goto err_out_free_netdev
;
368 pci_set_drvdata(pdev
, dev
);
369 ep
= netdev_priv(dev
);
372 ep
->mii
.mdio_read
= mdio_read
;
373 ep
->mii
.mdio_write
= mdio_write
;
374 ep
->mii
.phy_id_mask
= 0x1f;
375 ep
->mii
.reg_num_mask
= 0x1f;
377 ring_space
= dma_alloc_coherent(&pdev
->dev
, TX_TOTAL_SIZE
, &ring_dma
,
380 goto err_out_iounmap
;
381 ep
->tx_ring
= ring_space
;
382 ep
->tx_ring_dma
= ring_dma
;
384 ring_space
= dma_alloc_coherent(&pdev
->dev
, RX_TOTAL_SIZE
, &ring_dma
,
387 goto err_out_unmap_tx
;
388 ep
->rx_ring
= ring_space
;
389 ep
->rx_ring_dma
= ring_dma
;
391 if (dev
->mem_start
) {
392 option
= dev
->mem_start
;
393 duplex
= (dev
->mem_start
& 16) ? 1 : 0;
394 } else if (card_idx
>= 0 && card_idx
< MAX_UNITS
) {
395 if (options
[card_idx
] >= 0)
396 option
= options
[card_idx
];
397 if (full_duplex
[card_idx
] >= 0)
398 duplex
= full_duplex
[card_idx
];
401 spin_lock_init(&ep
->lock
);
402 spin_lock_init(&ep
->napi_lock
);
404 /* Bring the chip out of low-power mode. */
405 ew32(GENCTL
, 0x4200);
406 /* Magic?! If we don't set this bit the MII interface won't work. */
407 /* This magic is documented in SMSC app note 7.15 */
408 for (i
= 16; i
> 0; i
--)
411 /* Turn on the MII transceiver. */
414 ew32(NVCTL
, (er32(NVCTL
) & ~0x003c) | 0x4800);
415 ew32(GENCTL
, 0x0200);
417 /* Note: the '175 does not have a serial EEPROM. */
418 for (i
= 0; i
< 3; i
++)
419 ((__le16
*)dev
->dev_addr
)[i
] = cpu_to_le16(er16(LAN0
+ i
*4));
422 dev_dbg(&pdev
->dev
, "EEPROM contents:\n");
423 for (i
= 0; i
< 64; i
++)
424 pr_cont(" %4.4x%s", read_eeprom(ep
, i
),
425 i
% 16 == 15 ? "\n" : "");
429 ep
->chip_id
= chip_idx
;
430 ep
->chip_flags
= pci_id_tbl
[chip_idx
].drv_flags
;
432 (ep
->chip_flags
& TYPE2_INTR
? PCIBusErr175
: PCIBusErr170
)
433 | CntFull
| TxUnderrun
| EpicNapiEvent
;
435 /* Find the connected MII xcvrs.
436 Doing this in open() would allow detecting external xcvrs later, but
437 takes much time and no cards have external MII. */
439 int phy
, phy_idx
= 0;
440 for (phy
= 1; phy
< 32 && phy_idx
< sizeof(ep
->phys
); phy
++) {
441 int mii_status
= mdio_read(dev
, phy
, MII_BMSR
);
442 if (mii_status
!= 0xffff && mii_status
!= 0x0000) {
443 ep
->phys
[phy_idx
++] = phy
;
445 "MII transceiver #%d control "
446 "%4.4x status %4.4x.\n",
447 phy
, mdio_read(dev
, phy
, 0), mii_status
);
450 ep
->mii_phy_cnt
= phy_idx
;
453 ep
->mii
.advertising
= mdio_read(dev
, phy
, MII_ADVERTISE
);
455 "Autonegotiation advertising %4.4x link "
457 ep
->mii
.advertising
, mdio_read(dev
, phy
, 5));
458 } else if ( ! (ep
->chip_flags
& NO_MII
)) {
460 "***WARNING***: No MII transceiver found!\n");
461 /* Use the known PHY address of the EPII. */
464 ep
->mii
.phy_id
= ep
->phys
[0];
467 /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */
468 if (ep
->chip_flags
& MII_PWRDWN
)
469 ew32(NVCTL
, er32(NVCTL
) & ~0x483c);
470 ew32(GENCTL
, 0x0008);
472 /* The lower four bits are the media type. */
474 ep
->mii
.force_media
= ep
->mii
.full_duplex
= 1;
475 dev_info(&pdev
->dev
, "Forced full duplex requested.\n");
477 dev
->if_port
= ep
->default_port
= option
;
479 /* The Epic-specific entries in the device structure. */
480 dev
->netdev_ops
= &epic_netdev_ops
;
481 dev
->ethtool_ops
= &netdev_ethtool_ops
;
482 dev
->watchdog_timeo
= TX_TIMEOUT
;
483 netif_napi_add(dev
, &ep
->napi
, epic_poll
, 64);
485 ret
= register_netdev(dev
);
487 goto err_out_unmap_rx
;
489 netdev_info(dev
, "%s at %lx, IRQ %d, %pM\n",
490 pci_id_tbl
[chip_idx
].name
,
491 (long)pci_resource_start(pdev
, EPIC_BAR
), pdev
->irq
,
498 dma_free_coherent(&pdev
->dev
, RX_TOTAL_SIZE
, ep
->rx_ring
,
501 dma_free_coherent(&pdev
->dev
, TX_TOTAL_SIZE
, ep
->tx_ring
,
504 pci_iounmap(pdev
, ioaddr
);
508 pci_release_regions(pdev
);
510 pci_disable_device(pdev
);
514 /* Serial EEPROM section. */
516 /* EEPROM_Ctrl bits. */
517 #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */
518 #define EE_CS 0x02 /* EEPROM chip select. */
519 #define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */
520 #define EE_WRITE_0 0x01
521 #define EE_WRITE_1 0x09
522 #define EE_DATA_READ 0x10 /* EEPROM chip data out. */
523 #define EE_ENB (0x0001 | EE_CS)
525 /* Delay between EEPROM clock transitions.
526 This serves to flush the operation to the PCI bus.
529 #define eeprom_delay() er32(EECTL)
531 /* The EEPROM commands include the alway-set leading bit. */
532 #define EE_WRITE_CMD (5 << 6)
533 #define EE_READ64_CMD (6 << 6)
534 #define EE_READ256_CMD (6 << 8)
535 #define EE_ERASE_CMD (7 << 6)
537 static void epic_disable_int(struct net_device
*dev
, struct epic_private
*ep
)
539 void __iomem
*ioaddr
= ep
->ioaddr
;
541 ew32(INTMASK
, 0x00000000);
544 static inline void __epic_pci_commit(void __iomem
*ioaddr
)
551 static inline void epic_napi_irq_off(struct net_device
*dev
,
552 struct epic_private
*ep
)
554 void __iomem
*ioaddr
= ep
->ioaddr
;
556 ew32(INTMASK
, ep
->irq_mask
& ~EpicNapiEvent
);
557 __epic_pci_commit(ioaddr
);
560 static inline void epic_napi_irq_on(struct net_device
*dev
,
561 struct epic_private
*ep
)
563 void __iomem
*ioaddr
= ep
->ioaddr
;
565 /* No need to commit possible posted write */
566 ew32(INTMASK
, ep
->irq_mask
| EpicNapiEvent
);
569 static int read_eeprom(struct epic_private
*ep
, int location
)
571 void __iomem
*ioaddr
= ep
->ioaddr
;
574 int read_cmd
= location
|
575 (er32(EECTL
) & 0x40 ? EE_READ64_CMD
: EE_READ256_CMD
);
577 ew32(EECTL
, EE_ENB
& ~EE_CS
);
580 /* Shift the read command bits out. */
581 for (i
= 12; i
>= 0; i
--) {
582 short dataval
= (read_cmd
& (1 << i
)) ? EE_WRITE_1
: EE_WRITE_0
;
583 ew32(EECTL
, EE_ENB
| dataval
);
585 ew32(EECTL
, EE_ENB
| dataval
| EE_SHIFT_CLK
);
590 for (i
= 16; i
> 0; i
--) {
591 ew32(EECTL
, EE_ENB
| EE_SHIFT_CLK
);
593 retval
= (retval
<< 1) | ((er32(EECTL
) & EE_DATA_READ
) ? 1 : 0);
598 /* Terminate the EEPROM access. */
599 ew32(EECTL
, EE_ENB
& ~EE_CS
);
604 #define MII_WRITEOP 2
605 static int mdio_read(struct net_device
*dev
, int phy_id
, int location
)
607 struct epic_private
*ep
= netdev_priv(dev
);
608 void __iomem
*ioaddr
= ep
->ioaddr
;
609 int read_cmd
= (phy_id
<< 9) | (location
<< 4) | MII_READOP
;
612 ew32(MIICtrl
, read_cmd
);
613 /* Typical operation takes 25 loops. */
614 for (i
= 400; i
> 0; i
--) {
616 if ((er32(MIICtrl
) & MII_READOP
) == 0) {
617 /* Work around read failure bug. */
618 if (phy_id
== 1 && location
< 6 &&
619 er16(MIIData
) == 0xffff) {
620 ew32(MIICtrl
, read_cmd
);
623 return er16(MIIData
);
629 static void mdio_write(struct net_device
*dev
, int phy_id
, int loc
, int value
)
631 struct epic_private
*ep
= netdev_priv(dev
);
632 void __iomem
*ioaddr
= ep
->ioaddr
;
635 ew16(MIIData
, value
);
636 ew32(MIICtrl
, (phy_id
<< 9) | (loc
<< 4) | MII_WRITEOP
);
637 for (i
= 10000; i
> 0; i
--) {
639 if ((er32(MIICtrl
) & MII_WRITEOP
) == 0)
645 static int epic_open(struct net_device
*dev
)
647 struct epic_private
*ep
= netdev_priv(dev
);
648 void __iomem
*ioaddr
= ep
->ioaddr
;
649 const int irq
= ep
->pci_dev
->irq
;
652 /* Soft reset the chip. */
653 ew32(GENCTL
, 0x4001);
655 napi_enable(&ep
->napi
);
656 rc
= request_irq(irq
, epic_interrupt
, IRQF_SHARED
, dev
->name
, dev
);
658 napi_disable(&ep
->napi
);
664 ew32(GENCTL
, 0x4000);
665 /* This magic is documented in SMSC app note 7.15 */
666 for (i
= 16; i
> 0; i
--)
669 /* Pull the chip out of low-power mode, enable interrupts, and set for
670 PCI read multiple. The MIIcfg setting and strange write order are
671 required by the details of which bits are reset and the transceiver
672 wiring on the Ositech CardBus card.
675 ew32(MIICfg
, dev
->if_port
== 1 ? 0x13 : 0x12);
677 if (ep
->chip_flags
& MII_PWRDWN
)
678 ew32(NVCTL
, (er32(NVCTL
) & ~0x003c) | 0x4800);
680 /* Tell the chip to byteswap descriptors on big-endian hosts */
682 ew32(GENCTL
, 0x4432 | (RX_FIFO_THRESH
<< 8));
684 ew32(GENCTL
, 0x0432 | (RX_FIFO_THRESH
<< 8));
686 ew32(GENCTL
, 0x4412 | (RX_FIFO_THRESH
<< 8));
688 ew32(GENCTL
, 0x0412 | (RX_FIFO_THRESH
<< 8));
691 udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */
693 for (i
= 0; i
< 3; i
++)
694 ew32(LAN0
+ i
*4, le16_to_cpu(((__le16
*)dev
->dev_addr
)[i
]));
696 ep
->tx_threshold
= TX_FIFO_THRESH
;
697 ew32(TxThresh
, ep
->tx_threshold
);
699 if (media2miictl
[dev
->if_port
& 15]) {
701 mdio_write(dev
, ep
->phys
[0], MII_BMCR
, media2miictl
[dev
->if_port
&15]);
702 if (dev
->if_port
== 1) {
704 netdev_info(dev
, "Using the 10base2 transceiver, MII status %4.4x.\n",
705 mdio_read(dev
, ep
->phys
[0], MII_BMSR
));
708 int mii_lpa
= mdio_read(dev
, ep
->phys
[0], MII_LPA
);
709 if (mii_lpa
!= 0xffff) {
710 if ((mii_lpa
& LPA_100FULL
) || (mii_lpa
& 0x01C0) == LPA_10FULL
)
711 ep
->mii
.full_duplex
= 1;
712 else if (! (mii_lpa
& LPA_LPACK
))
713 mdio_write(dev
, ep
->phys
[0], MII_BMCR
, BMCR_ANENABLE
|BMCR_ANRESTART
);
715 netdev_info(dev
, "Setting %s-duplex based on MII xcvr %d register read of %4.4x.\n",
716 ep
->mii
.full_duplex
? "full"
718 ep
->phys
[0], mii_lpa
);
722 ew32(TxCtrl
, ep
->mii
.full_duplex
? 0x7f : 0x79);
723 ew32(PRxCDAR
, ep
->rx_ring_dma
);
724 ew32(PTxCDAR
, ep
->tx_ring_dma
);
726 /* Start the chip's Rx process. */
728 ew32(COMMAND
, StartRx
| RxQueued
);
730 netif_start_queue(dev
);
732 /* Enable interrupts by setting the interrupt mask. */
733 ew32(INTMASK
, RxError
| RxHeader
| EpicNapiEvent
| CntFull
|
734 ((ep
->chip_flags
& TYPE2_INTR
) ? PCIBusErr175
: PCIBusErr170
) |
738 netdev_dbg(dev
, "epic_open() ioaddr %p IRQ %d status %4.4x %s-duplex.\n",
739 ioaddr
, irq
, er32(GENCTL
),
740 ep
->mii
.full_duplex
? "full" : "half");
743 /* Set the timer to switch to check for link beat and perhaps switch
744 to an alternate media type. */
745 timer_setup(&ep
->timer
, epic_timer
, 0);
746 ep
->timer
.expires
= jiffies
+ 3*HZ
;
747 add_timer(&ep
->timer
);
752 /* Reset the chip to recover from a PCI transaction error.
753 This may occur at interrupt time. */
754 static void epic_pause(struct net_device
*dev
)
756 struct net_device_stats
*stats
= &dev
->stats
;
757 struct epic_private
*ep
= netdev_priv(dev
);
758 void __iomem
*ioaddr
= ep
->ioaddr
;
760 netif_stop_queue (dev
);
762 /* Disable interrupts by clearing the interrupt mask. */
763 ew32(INTMASK
, 0x00000000);
764 /* Stop the chip's Tx and Rx DMA processes. */
765 ew16(COMMAND
, StopRx
| StopTxDMA
| StopRxDMA
);
767 /* Update the error counts. */
768 if (er16(COMMAND
) != 0xffff) {
769 stats
->rx_missed_errors
+= er8(MPCNT
);
770 stats
->rx_frame_errors
+= er8(ALICNT
);
771 stats
->rx_crc_errors
+= er8(CRCCNT
);
774 /* Remove the packets on the Rx queue. */
775 epic_rx(dev
, RX_RING_SIZE
);
778 static void epic_restart(struct net_device
*dev
)
780 struct epic_private
*ep
= netdev_priv(dev
);
781 void __iomem
*ioaddr
= ep
->ioaddr
;
784 /* Soft reset the chip. */
785 ew32(GENCTL
, 0x4001);
787 netdev_dbg(dev
, "Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n",
788 ep
->cur_rx
, ep
->dirty_rx
, ep
->dirty_tx
, ep
->cur_tx
);
791 /* This magic is documented in SMSC app note 7.15 */
792 for (i
= 16; i
> 0; i
--)
796 ew32(GENCTL
, 0x0432 | (RX_FIFO_THRESH
<< 8));
798 ew32(GENCTL
, 0x0412 | (RX_FIFO_THRESH
<< 8));
800 ew32(MIICfg
, dev
->if_port
== 1 ? 0x13 : 0x12);
801 if (ep
->chip_flags
& MII_PWRDWN
)
802 ew32(NVCTL
, (er32(NVCTL
) & ~0x003c) | 0x4800);
804 for (i
= 0; i
< 3; i
++)
805 ew32(LAN0
+ i
*4, le16_to_cpu(((__le16
*)dev
->dev_addr
)[i
]));
807 ep
->tx_threshold
= TX_FIFO_THRESH
;
808 ew32(TxThresh
, ep
->tx_threshold
);
809 ew32(TxCtrl
, ep
->mii
.full_duplex
? 0x7f : 0x79);
810 ew32(PRxCDAR
, ep
->rx_ring_dma
+
811 (ep
->cur_rx
% RX_RING_SIZE
) * sizeof(struct epic_rx_desc
));
812 ew32(PTxCDAR
, ep
->tx_ring_dma
+
813 (ep
->dirty_tx
% TX_RING_SIZE
) * sizeof(struct epic_tx_desc
));
815 /* Start the chip's Rx process. */
817 ew32(COMMAND
, StartRx
| RxQueued
);
819 /* Enable interrupts by setting the interrupt mask. */
820 ew32(INTMASK
, RxError
| RxHeader
| EpicNapiEvent
| CntFull
|
821 ((ep
->chip_flags
& TYPE2_INTR
) ? PCIBusErr175
: PCIBusErr170
) |
824 netdev_dbg(dev
, "epic_restart() done, cmd status %4.4x, ctl %4.4x interrupt %4.4x.\n",
825 er32(COMMAND
), er32(GENCTL
), er32(INTSTAT
));
828 static void check_media(struct net_device
*dev
)
830 struct epic_private
*ep
= netdev_priv(dev
);
831 void __iomem
*ioaddr
= ep
->ioaddr
;
832 int mii_lpa
= ep
->mii_phy_cnt
? mdio_read(dev
, ep
->phys
[0], MII_LPA
) : 0;
833 int negotiated
= mii_lpa
& ep
->mii
.advertising
;
834 int duplex
= (negotiated
& 0x0100) || (negotiated
& 0x01C0) == 0x0040;
836 if (ep
->mii
.force_media
)
838 if (mii_lpa
== 0xffff) /* Bogus read */
840 if (ep
->mii
.full_duplex
!= duplex
) {
841 ep
->mii
.full_duplex
= duplex
;
842 netdev_info(dev
, "Setting %s-duplex based on MII #%d link partner capability of %4.4x.\n",
843 ep
->mii
.full_duplex
? "full" : "half",
844 ep
->phys
[0], mii_lpa
);
845 ew32(TxCtrl
, ep
->mii
.full_duplex
? 0x7F : 0x79);
849 static void epic_timer(struct timer_list
*t
)
851 struct epic_private
*ep
= from_timer(ep
, t
, timer
);
852 struct net_device
*dev
= ep
->mii
.dev
;
853 void __iomem
*ioaddr
= ep
->ioaddr
;
854 int next_tick
= 5*HZ
;
857 netdev_dbg(dev
, "Media monitor tick, Tx status %8.8x.\n",
859 netdev_dbg(dev
, "Other registers are IntMask %4.4x IntStatus %4.4x RxStatus %4.4x.\n",
860 er32(INTMASK
), er32(INTSTAT
), er32(RxSTAT
));
865 ep
->timer
.expires
= jiffies
+ next_tick
;
866 add_timer(&ep
->timer
);
869 static void epic_tx_timeout(struct net_device
*dev
, unsigned int txqueue
)
871 struct epic_private
*ep
= netdev_priv(dev
);
872 void __iomem
*ioaddr
= ep
->ioaddr
;
875 netdev_warn(dev
, "Transmit timeout using MII device, Tx status %4.4x.\n",
878 netdev_dbg(dev
, "Tx indices: dirty_tx %d, cur_tx %d.\n",
879 ep
->dirty_tx
, ep
->cur_tx
);
882 if (er16(TxSTAT
) & 0x10) { /* Tx FIFO underflow. */
883 dev
->stats
.tx_fifo_errors
++;
884 ew32(COMMAND
, RestartTx
);
887 ew32(COMMAND
, TxQueued
);
890 netif_trans_update(dev
); /* prevent tx timeout */
891 dev
->stats
.tx_errors
++;
893 netif_wake_queue(dev
);
896 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
897 static void epic_init_ring(struct net_device
*dev
)
899 struct epic_private
*ep
= netdev_priv(dev
);
903 ep
->dirty_tx
= ep
->cur_tx
= 0;
904 ep
->cur_rx
= ep
->dirty_rx
= 0;
905 ep
->rx_buf_sz
= (dev
->mtu
<= 1500 ? PKT_BUF_SZ
: dev
->mtu
+ 32);
907 /* Initialize all Rx descriptors. */
908 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
909 ep
->rx_ring
[i
].rxstatus
= 0;
910 ep
->rx_ring
[i
].buflength
= ep
->rx_buf_sz
;
911 ep
->rx_ring
[i
].next
= ep
->rx_ring_dma
+
912 (i
+1)*sizeof(struct epic_rx_desc
);
913 ep
->rx_skbuff
[i
] = NULL
;
915 /* Mark the last entry as wrapping the ring. */
916 ep
->rx_ring
[i
-1].next
= ep
->rx_ring_dma
;
918 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
919 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
920 struct sk_buff
*skb
= netdev_alloc_skb(dev
, ep
->rx_buf_sz
+ 2);
921 ep
->rx_skbuff
[i
] = skb
;
924 skb_reserve(skb
, 2); /* 16 byte align the IP header. */
925 ep
->rx_ring
[i
].bufaddr
= dma_map_single(&ep
->pci_dev
->dev
,
929 ep
->rx_ring
[i
].rxstatus
= DescOwn
;
931 ep
->dirty_rx
= (unsigned int)(i
- RX_RING_SIZE
);
933 /* The Tx buffer descriptor is filled in as needed, but we
934 do need to clear the ownership bit. */
935 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
936 ep
->tx_skbuff
[i
] = NULL
;
937 ep
->tx_ring
[i
].txstatus
= 0x0000;
938 ep
->tx_ring
[i
].next
= ep
->tx_ring_dma
+
939 (i
+1)*sizeof(struct epic_tx_desc
);
941 ep
->tx_ring
[i
-1].next
= ep
->tx_ring_dma
;
944 static netdev_tx_t
epic_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
946 struct epic_private
*ep
= netdev_priv(dev
);
947 void __iomem
*ioaddr
= ep
->ioaddr
;
948 int entry
, free_count
;
952 if (skb_padto(skb
, ETH_ZLEN
))
955 /* Caution: the write order is important here, set the field with the
956 "ownership" bit last. */
958 /* Calculate the next Tx descriptor entry. */
959 spin_lock_irqsave(&ep
->lock
, flags
);
960 free_count
= ep
->cur_tx
- ep
->dirty_tx
;
961 entry
= ep
->cur_tx
% TX_RING_SIZE
;
963 ep
->tx_skbuff
[entry
] = skb
;
964 ep
->tx_ring
[entry
].bufaddr
= dma_map_single(&ep
->pci_dev
->dev
,
967 if (free_count
< TX_QUEUE_LEN
/2) {/* Typical path */
968 ctrl_word
= 0x100000; /* No interrupt */
969 } else if (free_count
== TX_QUEUE_LEN
/2) {
970 ctrl_word
= 0x140000; /* Tx-done intr. */
971 } else if (free_count
< TX_QUEUE_LEN
- 1) {
972 ctrl_word
= 0x100000; /* No Tx-done intr. */
974 /* Leave room for an additional entry. */
975 ctrl_word
= 0x140000; /* Tx-done intr. */
978 ep
->tx_ring
[entry
].buflength
= ctrl_word
| skb
->len
;
979 ep
->tx_ring
[entry
].txstatus
=
980 ((skb
->len
>= ETH_ZLEN
? skb
->len
: ETH_ZLEN
) << 16)
985 netif_stop_queue(dev
);
987 spin_unlock_irqrestore(&ep
->lock
, flags
);
988 /* Trigger an immediate transmit demand. */
989 ew32(COMMAND
, TxQueued
);
992 netdev_dbg(dev
, "Queued Tx packet size %d to slot %d, flag %2.2x Tx status %8.8x.\n",
993 skb
->len
, entry
, ctrl_word
, er32(TxSTAT
));
998 static void epic_tx_error(struct net_device
*dev
, struct epic_private
*ep
,
1001 struct net_device_stats
*stats
= &dev
->stats
;
1003 #ifndef final_version
1004 /* There was an major error, log it. */
1006 netdev_dbg(dev
, "Transmit error, Tx status %8.8x.\n",
1010 if (status
& 0x1050)
1011 stats
->tx_aborted_errors
++;
1012 if (status
& 0x0008)
1013 stats
->tx_carrier_errors
++;
1014 if (status
& 0x0040)
1015 stats
->tx_window_errors
++;
1016 if (status
& 0x0010)
1017 stats
->tx_fifo_errors
++;
1020 static void epic_tx(struct net_device
*dev
, struct epic_private
*ep
)
1022 unsigned int dirty_tx
, cur_tx
;
1025 * Note: if this lock becomes a problem we can narrow the locked
1026 * region at the cost of occasionally grabbing the lock more times.
1028 cur_tx
= ep
->cur_tx
;
1029 for (dirty_tx
= ep
->dirty_tx
; cur_tx
- dirty_tx
> 0; dirty_tx
++) {
1030 struct sk_buff
*skb
;
1031 int entry
= dirty_tx
% TX_RING_SIZE
;
1032 int txstatus
= ep
->tx_ring
[entry
].txstatus
;
1034 if (txstatus
& DescOwn
)
1035 break; /* It still hasn't been Txed */
1037 if (likely(txstatus
& 0x0001)) {
1038 dev
->stats
.collisions
+= (txstatus
>> 8) & 15;
1039 dev
->stats
.tx_packets
++;
1040 dev
->stats
.tx_bytes
+= ep
->tx_skbuff
[entry
]->len
;
1042 epic_tx_error(dev
, ep
, txstatus
);
1044 /* Free the original skb. */
1045 skb
= ep
->tx_skbuff
[entry
];
1046 dma_unmap_single(&ep
->pci_dev
->dev
,
1047 ep
->tx_ring
[entry
].bufaddr
, skb
->len
,
1049 dev_consume_skb_irq(skb
);
1050 ep
->tx_skbuff
[entry
] = NULL
;
1053 #ifndef final_version
1054 if (cur_tx
- dirty_tx
> TX_RING_SIZE
) {
1055 netdev_warn(dev
, "Out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
1056 dirty_tx
, cur_tx
, ep
->tx_full
);
1057 dirty_tx
+= TX_RING_SIZE
;
1060 ep
->dirty_tx
= dirty_tx
;
1061 if (ep
->tx_full
&& cur_tx
- dirty_tx
< TX_QUEUE_LEN
- 4) {
1062 /* The ring is no longer full, allow new TX entries. */
1064 netif_wake_queue(dev
);
1068 /* The interrupt handler does all of the Rx thread work and cleans up
1069 after the Tx thread. */
1070 static irqreturn_t
epic_interrupt(int irq
, void *dev_instance
)
1072 struct net_device
*dev
= dev_instance
;
1073 struct epic_private
*ep
= netdev_priv(dev
);
1074 void __iomem
*ioaddr
= ep
->ioaddr
;
1075 unsigned int handled
= 0;
1078 status
= er32(INTSTAT
);
1079 /* Acknowledge all of the current interrupt sources ASAP. */
1080 ew32(INTSTAT
, status
& EpicNormalEvent
);
1083 netdev_dbg(dev
, "Interrupt, status=%#8.8x new intstat=%#8.8x.\n",
1084 status
, er32(INTSTAT
));
1087 if ((status
& IntrSummary
) == 0)
1092 if (status
& EpicNapiEvent
) {
1093 spin_lock(&ep
->napi_lock
);
1094 if (napi_schedule_prep(&ep
->napi
)) {
1095 epic_napi_irq_off(dev
, ep
);
1096 __napi_schedule(&ep
->napi
);
1098 spin_unlock(&ep
->napi_lock
);
1100 status
&= ~EpicNapiEvent
;
1102 /* Check uncommon events all at once. */
1103 if (status
& (CntFull
| TxUnderrun
| PCIBusErr170
| PCIBusErr175
)) {
1104 struct net_device_stats
*stats
= &dev
->stats
;
1106 if (status
== EpicRemoved
)
1109 /* Always update the error counts to avoid overhead later. */
1110 stats
->rx_missed_errors
+= er8(MPCNT
);
1111 stats
->rx_frame_errors
+= er8(ALICNT
);
1112 stats
->rx_crc_errors
+= er8(CRCCNT
);
1114 if (status
& TxUnderrun
) { /* Tx FIFO underflow. */
1115 stats
->tx_fifo_errors
++;
1116 ew32(TxThresh
, ep
->tx_threshold
+= 128);
1117 /* Restart the transmit process. */
1118 ew32(COMMAND
, RestartTx
);
1120 if (status
& PCIBusErr170
) {
1121 netdev_err(dev
, "PCI Bus Error! status %4.4x.\n",
1126 /* Clear all error sources. */
1127 ew32(INTSTAT
, status
& 0x7f18);
1132 netdev_dbg(dev
, "exit interrupt, intr_status=%#4.4x.\n",
1136 return IRQ_RETVAL(handled
);
1139 static int epic_rx(struct net_device
*dev
, int budget
)
1141 struct epic_private
*ep
= netdev_priv(dev
);
1142 int entry
= ep
->cur_rx
% RX_RING_SIZE
;
1143 int rx_work_limit
= ep
->dirty_rx
+ RX_RING_SIZE
- ep
->cur_rx
;
1147 netdev_dbg(dev
, " In epic_rx(), entry %d %8.8x.\n", entry
,
1148 ep
->rx_ring
[entry
].rxstatus
);
1150 if (rx_work_limit
> budget
)
1151 rx_work_limit
= budget
;
1153 /* If we own the next entry, it's a new packet. Send it up. */
1154 while ((ep
->rx_ring
[entry
].rxstatus
& DescOwn
) == 0) {
1155 int status
= ep
->rx_ring
[entry
].rxstatus
;
1158 netdev_dbg(dev
, " epic_rx() status was %8.8x.\n",
1160 if (--rx_work_limit
< 0)
1162 if (status
& 0x2006) {
1164 netdev_dbg(dev
, "epic_rx() error status was %8.8x.\n",
1166 if (status
& 0x2000) {
1167 netdev_warn(dev
, "Oversized Ethernet frame spanned multiple buffers, status %4.4x!\n",
1169 dev
->stats
.rx_length_errors
++;
1170 } else if (status
& 0x0006)
1171 /* Rx Frame errors are counted in hardware. */
1172 dev
->stats
.rx_errors
++;
1174 /* Malloc up new buffer, compatible with net-2e. */
1175 /* Omit the four octet CRC from the length. */
1176 short pkt_len
= (status
>> 16) - 4;
1177 struct sk_buff
*skb
;
1179 if (pkt_len
> PKT_BUF_SZ
- 4) {
1180 netdev_err(dev
, "Oversized Ethernet frame, status %x %d bytes.\n",
1184 /* Check if the packet is long enough to accept without copying
1185 to a minimally-sized skbuff. */
1186 if (pkt_len
< rx_copybreak
&&
1187 (skb
= netdev_alloc_skb(dev
, pkt_len
+ 2)) != NULL
) {
1188 skb_reserve(skb
, 2); /* 16 byte align the IP header */
1189 dma_sync_single_for_cpu(&ep
->pci_dev
->dev
,
1190 ep
->rx_ring
[entry
].bufaddr
,
1193 skb_copy_to_linear_data(skb
, ep
->rx_skbuff
[entry
]->data
, pkt_len
);
1194 skb_put(skb
, pkt_len
);
1195 dma_sync_single_for_device(&ep
->pci_dev
->dev
,
1196 ep
->rx_ring
[entry
].bufaddr
,
1200 dma_unmap_single(&ep
->pci_dev
->dev
,
1201 ep
->rx_ring
[entry
].bufaddr
,
1204 skb_put(skb
= ep
->rx_skbuff
[entry
], pkt_len
);
1205 ep
->rx_skbuff
[entry
] = NULL
;
1207 skb
->protocol
= eth_type_trans(skb
, dev
);
1208 netif_receive_skb(skb
);
1209 dev
->stats
.rx_packets
++;
1210 dev
->stats
.rx_bytes
+= pkt_len
;
1213 entry
= (++ep
->cur_rx
) % RX_RING_SIZE
;
1216 /* Refill the Rx ring buffers. */
1217 for (; ep
->cur_rx
- ep
->dirty_rx
> 0; ep
->dirty_rx
++) {
1218 entry
= ep
->dirty_rx
% RX_RING_SIZE
;
1219 if (ep
->rx_skbuff
[entry
] == NULL
) {
1220 struct sk_buff
*skb
;
1221 skb
= ep
->rx_skbuff
[entry
] = netdev_alloc_skb(dev
, ep
->rx_buf_sz
+ 2);
1224 skb_reserve(skb
, 2); /* Align IP on 16 byte boundaries */
1225 ep
->rx_ring
[entry
].bufaddr
= dma_map_single(&ep
->pci_dev
->dev
,
1231 /* AV: shouldn't we add a barrier here? */
1232 ep
->rx_ring
[entry
].rxstatus
= DescOwn
;
1237 static void epic_rx_err(struct net_device
*dev
, struct epic_private
*ep
)
1239 void __iomem
*ioaddr
= ep
->ioaddr
;
1242 status
= er32(INTSTAT
);
1244 if (status
== EpicRemoved
)
1246 if (status
& RxOverflow
) /* Missed a Rx frame. */
1247 dev
->stats
.rx_errors
++;
1248 if (status
& (RxOverflow
| RxFull
))
1249 ew16(COMMAND
, RxQueued
);
1252 static int epic_poll(struct napi_struct
*napi
, int budget
)
1254 struct epic_private
*ep
= container_of(napi
, struct epic_private
, napi
);
1255 struct net_device
*dev
= ep
->mii
.dev
;
1256 void __iomem
*ioaddr
= ep
->ioaddr
;
1261 work_done
= epic_rx(dev
, budget
);
1263 epic_rx_err(dev
, ep
);
1265 if (work_done
< budget
&& napi_complete_done(napi
, work_done
)) {
1266 unsigned long flags
;
1268 spin_lock_irqsave(&ep
->napi_lock
, flags
);
1270 ew32(INTSTAT
, EpicNapiEvent
);
1271 epic_napi_irq_on(dev
, ep
);
1272 spin_unlock_irqrestore(&ep
->napi_lock
, flags
);
1278 static int epic_close(struct net_device
*dev
)
1280 struct epic_private
*ep
= netdev_priv(dev
);
1281 struct pci_dev
*pdev
= ep
->pci_dev
;
1282 void __iomem
*ioaddr
= ep
->ioaddr
;
1283 struct sk_buff
*skb
;
1286 netif_stop_queue(dev
);
1287 napi_disable(&ep
->napi
);
1290 netdev_dbg(dev
, "Shutting down ethercard, status was %2.2x.\n",
1293 del_timer_sync(&ep
->timer
);
1295 epic_disable_int(dev
, ep
);
1297 free_irq(pdev
->irq
, dev
);
1301 /* Free all the skbuffs in the Rx queue. */
1302 for (i
= 0; i
< RX_RING_SIZE
; i
++) {
1303 skb
= ep
->rx_skbuff
[i
];
1304 ep
->rx_skbuff
[i
] = NULL
;
1305 ep
->rx_ring
[i
].rxstatus
= 0; /* Not owned by Epic chip. */
1306 ep
->rx_ring
[i
].buflength
= 0;
1308 dma_unmap_single(&pdev
->dev
, ep
->rx_ring
[i
].bufaddr
,
1309 ep
->rx_buf_sz
, DMA_FROM_DEVICE
);
1312 ep
->rx_ring
[i
].bufaddr
= 0xBADF00D0; /* An invalid address. */
1314 for (i
= 0; i
< TX_RING_SIZE
; i
++) {
1315 skb
= ep
->tx_skbuff
[i
];
1316 ep
->tx_skbuff
[i
] = NULL
;
1319 dma_unmap_single(&pdev
->dev
, ep
->tx_ring
[i
].bufaddr
, skb
->len
,
1324 /* Green! Leave the chip in low-power mode. */
1325 ew32(GENCTL
, 0x0008);
1330 static struct net_device_stats
*epic_get_stats(struct net_device
*dev
)
1332 struct epic_private
*ep
= netdev_priv(dev
);
1333 void __iomem
*ioaddr
= ep
->ioaddr
;
1335 if (netif_running(dev
)) {
1336 struct net_device_stats
*stats
= &dev
->stats
;
1338 stats
->rx_missed_errors
+= er8(MPCNT
);
1339 stats
->rx_frame_errors
+= er8(ALICNT
);
1340 stats
->rx_crc_errors
+= er8(CRCCNT
);
1346 /* Set or clear the multicast filter for this adaptor.
1347 Note that we only use exclusion around actually queueing the
1348 new frame, not around filling ep->setup_frame. This is non-deterministic
1349 when re-entered but still correct. */
1351 static void set_rx_mode(struct net_device
*dev
)
1353 struct epic_private
*ep
= netdev_priv(dev
);
1354 void __iomem
*ioaddr
= ep
->ioaddr
;
1355 unsigned char mc_filter
[8]; /* Multicast hash filter */
1358 if (dev
->flags
& IFF_PROMISC
) { /* Set promiscuous. */
1359 ew32(RxCtrl
, 0x002c);
1360 /* Unconditionally log net taps. */
1361 memset(mc_filter
, 0xff, sizeof(mc_filter
));
1362 } else if ((!netdev_mc_empty(dev
)) || (dev
->flags
& IFF_ALLMULTI
)) {
1363 /* There is apparently a chip bug, so the multicast filter
1364 is never enabled. */
1365 /* Too many to filter perfectly -- accept all multicasts. */
1366 memset(mc_filter
, 0xff, sizeof(mc_filter
));
1367 ew32(RxCtrl
, 0x000c);
1368 } else if (netdev_mc_empty(dev
)) {
1369 ew32(RxCtrl
, 0x0004);
1371 } else { /* Never executed, for now. */
1372 struct netdev_hw_addr
*ha
;
1374 memset(mc_filter
, 0, sizeof(mc_filter
));
1375 netdev_for_each_mc_addr(ha
, dev
) {
1376 unsigned int bit_nr
=
1377 ether_crc_le(ETH_ALEN
, ha
->addr
) & 0x3f;
1378 mc_filter
[bit_nr
>> 3] |= (1 << bit_nr
);
1381 /* ToDo: perhaps we need to stop the Tx and Rx process here? */
1382 if (memcmp(mc_filter
, ep
->mc_filter
, sizeof(mc_filter
))) {
1383 for (i
= 0; i
< 4; i
++)
1384 ew16(MC0
+ i
*4, ((u16
*)mc_filter
)[i
]);
1385 memcpy(ep
->mc_filter
, mc_filter
, sizeof(mc_filter
));
1389 static void netdev_get_drvinfo (struct net_device
*dev
, struct ethtool_drvinfo
*info
)
1391 struct epic_private
*np
= netdev_priv(dev
);
1393 strlcpy(info
->driver
, DRV_NAME
, sizeof(info
->driver
));
1394 strlcpy(info
->version
, DRV_VERSION
, sizeof(info
->version
));
1395 strlcpy(info
->bus_info
, pci_name(np
->pci_dev
), sizeof(info
->bus_info
));
1398 static int netdev_get_link_ksettings(struct net_device
*dev
,
1399 struct ethtool_link_ksettings
*cmd
)
1401 struct epic_private
*np
= netdev_priv(dev
);
1403 spin_lock_irq(&np
->lock
);
1404 mii_ethtool_get_link_ksettings(&np
->mii
, cmd
);
1405 spin_unlock_irq(&np
->lock
);
1410 static int netdev_set_link_ksettings(struct net_device
*dev
,
1411 const struct ethtool_link_ksettings
*cmd
)
1413 struct epic_private
*np
= netdev_priv(dev
);
1416 spin_lock_irq(&np
->lock
);
1417 rc
= mii_ethtool_set_link_ksettings(&np
->mii
, cmd
);
1418 spin_unlock_irq(&np
->lock
);
1423 static int netdev_nway_reset(struct net_device
*dev
)
1425 struct epic_private
*np
= netdev_priv(dev
);
1426 return mii_nway_restart(&np
->mii
);
1429 static u32
netdev_get_link(struct net_device
*dev
)
1431 struct epic_private
*np
= netdev_priv(dev
);
1432 return mii_link_ok(&np
->mii
);
1435 static u32
netdev_get_msglevel(struct net_device
*dev
)
1440 static void netdev_set_msglevel(struct net_device
*dev
, u32 value
)
1445 static int ethtool_begin(struct net_device
*dev
)
1447 struct epic_private
*ep
= netdev_priv(dev
);
1448 void __iomem
*ioaddr
= ep
->ioaddr
;
1450 if (ep
->ethtool_ops_nesting
== U32_MAX
)
1452 /* power-up, if interface is down */
1453 if (!ep
->ethtool_ops_nesting
++ && !netif_running(dev
)) {
1454 ew32(GENCTL
, 0x0200);
1455 ew32(NVCTL
, (er32(NVCTL
) & ~0x003c) | 0x4800);
1460 static void ethtool_complete(struct net_device
*dev
)
1462 struct epic_private
*ep
= netdev_priv(dev
);
1463 void __iomem
*ioaddr
= ep
->ioaddr
;
1465 /* power-down, if interface is down */
1466 if (!--ep
->ethtool_ops_nesting
&& !netif_running(dev
)) {
1467 ew32(GENCTL
, 0x0008);
1468 ew32(NVCTL
, (er32(NVCTL
) & ~0x483c) | 0x0000);
1472 static const struct ethtool_ops netdev_ethtool_ops
= {
1473 .get_drvinfo
= netdev_get_drvinfo
,
1474 .nway_reset
= netdev_nway_reset
,
1475 .get_link
= netdev_get_link
,
1476 .get_msglevel
= netdev_get_msglevel
,
1477 .set_msglevel
= netdev_set_msglevel
,
1478 .begin
= ethtool_begin
,
1479 .complete
= ethtool_complete
,
1480 .get_link_ksettings
= netdev_get_link_ksettings
,
1481 .set_link_ksettings
= netdev_set_link_ksettings
,
1484 static int netdev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1486 struct epic_private
*np
= netdev_priv(dev
);
1487 void __iomem
*ioaddr
= np
->ioaddr
;
1488 struct mii_ioctl_data
*data
= if_mii(rq
);
1491 /* power-up, if interface is down */
1492 if (! netif_running(dev
)) {
1493 ew32(GENCTL
, 0x0200);
1494 ew32(NVCTL
, (er32(NVCTL
) & ~0x003c) | 0x4800);
1497 /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */
1498 spin_lock_irq(&np
->lock
);
1499 rc
= generic_mii_ioctl(&np
->mii
, data
, cmd
, NULL
);
1500 spin_unlock_irq(&np
->lock
);
1502 /* power-down, if interface is down */
1503 if (! netif_running(dev
)) {
1504 ew32(GENCTL
, 0x0008);
1505 ew32(NVCTL
, (er32(NVCTL
) & ~0x483c) | 0x0000);
1511 static void epic_remove_one(struct pci_dev
*pdev
)
1513 struct net_device
*dev
= pci_get_drvdata(pdev
);
1514 struct epic_private
*ep
= netdev_priv(dev
);
1516 dma_free_coherent(&pdev
->dev
, TX_TOTAL_SIZE
, ep
->tx_ring
,
1518 dma_free_coherent(&pdev
->dev
, RX_TOTAL_SIZE
, ep
->rx_ring
,
1520 unregister_netdev(dev
);
1521 pci_iounmap(pdev
, ep
->ioaddr
);
1522 pci_release_regions(pdev
);
1524 pci_disable_device(pdev
);
1525 /* pci_power_off(pdev, -1); */
1528 static int __maybe_unused
epic_suspend(struct device
*dev_d
)
1530 struct net_device
*dev
= dev_get_drvdata(dev_d
);
1531 struct epic_private
*ep
= netdev_priv(dev
);
1532 void __iomem
*ioaddr
= ep
->ioaddr
;
1534 if (!netif_running(dev
))
1537 /* Put the chip into low-power mode. */
1538 ew32(GENCTL
, 0x0008);
1539 /* pci_power_off(pdev, -1); */
1544 static int __maybe_unused
epic_resume(struct device
*dev_d
)
1546 struct net_device
*dev
= dev_get_drvdata(dev_d
);
1548 if (!netif_running(dev
))
1551 /* pci_power_on(pdev); */
1555 static SIMPLE_DEV_PM_OPS(epic_pm_ops
, epic_suspend
, epic_resume
);
1557 static struct pci_driver epic_driver
= {
1559 .id_table
= epic_pci_tbl
,
1560 .probe
= epic_init_one
,
1561 .remove
= epic_remove_one
,
1562 .driver
.pm
= &epic_pm_ops
,
1566 static int __init
epic_init (void)
1568 /* when a module, this is printed whether or not devices are found in probe */
1570 pr_info("%s%s\n", version
, version2
);
1573 return pci_register_driver(&epic_driver
);
1577 static void __exit
epic_cleanup (void)
1579 pci_unregister_driver (&epic_driver
);
1583 module_init(epic_init
);
1584 module_exit(epic_cleanup
);