Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* epic100.c: A SMC 83c170 EPIC/100 Fast Ethernet driver for Linux. */ |
| 2 | /* |
| 3 | Written/copyright 1997-2001 by Donald Becker. |
| 4 | |
| 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. |
| 11 | |
| 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. |
| 14 | |
| 15 | The author may be reached as becker@scyld.com, or C/O |
| 16 | Scyld Computing Corporation |
| 17 | 410 Severn Ave., Suite 210 |
| 18 | Annapolis MD 21403 |
| 19 | |
| 20 | Information and updates available at |
| 21 | http://www.scyld.com/network/epic100.html |
| 22 | |
| 23 | --------------------------------------------------------------------- |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | Linux kernel-specific changes: |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | LK1.1.2 (jgarzik): |
| 28 | * Merge becker version 1.09 (4/08/2000) |
| 29 | |
| 30 | LK1.1.3: |
| 31 | * Major bugfix to 1.09 driver (Francis Romieu) |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | LK1.1.4 (jgarzik): |
| 34 | * Merge becker test version 1.09 (5/29/2000) |
| 35 | |
| 36 | LK1.1.5: |
| 37 | * Fix locking (jgarzik) |
| 38 | * Limit 83c175 probe to ethernet-class PCI devices (rgooch) |
| 39 | |
| 40 | LK1.1.6: |
| 41 | * Merge becker version 1.11 |
| 42 | * Move pci_enable_device before any PCI BAR len checks |
| 43 | |
| 44 | LK1.1.7: |
| 45 | * { fill me in } |
| 46 | |
| 47 | LK1.1.8: |
| 48 | * ethtool driver info support (jgarzik) |
| 49 | |
| 50 | LK1.1.9: |
| 51 | * ethtool media get/set support (jgarzik) |
| 52 | |
| 53 | LK1.1.10: |
| 54 | * revert MII transceiver init change (jgarzik) |
| 55 | |
| 56 | LK1.1.11: |
| 57 | * implement ETHTOOL_[GS]SET, _NWAY_RST, _[GS]MSGLVL, _GLINK (jgarzik) |
| 58 | * replace some MII-related magic numbers with constants |
| 59 | |
| 60 | LK1.1.12: |
| 61 | * fix power-up sequence |
| 62 | |
| 63 | LK1.1.13: |
| 64 | * revert version 1.1.12, power-up sequence "fix" |
| 65 | |
| 66 | LK1.1.14 (Kryzsztof Halasa): |
| 67 | * fix spurious bad initializations |
| 68 | * pound phy a la SMSC's app note on the subject |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | AC1.1.14ac |
| 71 | * fix power up/down for ethtool that broke in 1.11 |
| 72 | |
| 73 | */ |
| 74 | |
| 75 | #define DRV_NAME "epic100" |
| 76 | #define DRV_VERSION "1.11+LK1.1.14+AC1.1.14" |
| 77 | #define DRV_RELDATE "June 2, 2004" |
| 78 | |
| 79 | /* The user-configurable values. |
| 80 | These may be modified when a driver module is loaded.*/ |
| 81 | |
| 82 | static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */ |
| 83 | |
| 84 | /* Used to pass the full-duplex flag, etc. */ |
| 85 | #define MAX_UNITS 8 /* More are supported, limit only on options */ |
| 86 | static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| 87 | static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| 88 | |
| 89 | /* Set the copy breakpoint for the copy-only-tiny-frames scheme. |
| 90 | Setting to > 1518 effectively disables this feature. */ |
| 91 | static int rx_copybreak; |
| 92 | |
| 93 | /* Operational parameters that are set at compile time. */ |
| 94 | |
| 95 | /* Keep the ring sizes a power of two for operational efficiency. |
| 96 | The compiler will convert <unsigned>'%'<2^N> into a bit mask. |
| 97 | Making the Tx ring too large decreases the effectiveness of channel |
| 98 | bonding and packet priority. |
| 99 | There are no ill effects from too-large receive rings. */ |
| 100 | #define TX_RING_SIZE 256 |
| 101 | #define TX_QUEUE_LEN 240 /* Limit ring entries actually used. */ |
| 102 | #define RX_RING_SIZE 256 |
| 103 | #define TX_TOTAL_SIZE TX_RING_SIZE*sizeof(struct epic_tx_desc) |
| 104 | #define RX_TOTAL_SIZE RX_RING_SIZE*sizeof(struct epic_rx_desc) |
| 105 | |
| 106 | /* Operational parameters that usually are not changed. */ |
| 107 | /* Time in jiffies before concluding the transmitter is hung. */ |
| 108 | #define TX_TIMEOUT (2*HZ) |
| 109 | |
| 110 | #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/ |
| 111 | |
| 112 | /* Bytes transferred to chip before transmission starts. */ |
| 113 | /* Initial threshold, increased on underflow, rounded down to 4 byte units. */ |
| 114 | #define TX_FIFO_THRESH 256 |
| 115 | #define RX_FIFO_THRESH 1 /* 0-3, 0==32, 64,96, or 3==128 bytes */ |
| 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | #include <linux/module.h> |
| 118 | #include <linux/kernel.h> |
| 119 | #include <linux/string.h> |
| 120 | #include <linux/timer.h> |
| 121 | #include <linux/errno.h> |
| 122 | #include <linux/ioport.h> |
| 123 | #include <linux/slab.h> |
| 124 | #include <linux/interrupt.h> |
| 125 | #include <linux/pci.h> |
| 126 | #include <linux/delay.h> |
| 127 | #include <linux/netdevice.h> |
| 128 | #include <linux/etherdevice.h> |
| 129 | #include <linux/skbuff.h> |
| 130 | #include <linux/init.h> |
| 131 | #include <linux/spinlock.h> |
| 132 | #include <linux/ethtool.h> |
| 133 | #include <linux/mii.h> |
| 134 | #include <linux/crc32.h> |
| 135 | #include <linux/bitops.h> |
| 136 | #include <asm/io.h> |
| 137 | #include <asm/uaccess.h> |
| 138 | |
| 139 | /* These identify the driver base version and may not be removed. */ |
| 140 | static char version[] __devinitdata = |
| 141 | DRV_NAME ".c:v1.11 1/7/2001 Written by Donald Becker <becker@scyld.com>\n"; |
| 142 | static char version2[] __devinitdata = |
| 143 | " http://www.scyld.com/network/epic100.html\n"; |
| 144 | static char version3[] __devinitdata = |
| 145 | " (unofficial 2.4.x kernel port, version " DRV_VERSION ", " DRV_RELDATE ")\n"; |
| 146 | |
| 147 | MODULE_AUTHOR("Donald Becker <becker@scyld.com>"); |
| 148 | MODULE_DESCRIPTION("SMC 83c170 EPIC series Ethernet driver"); |
| 149 | MODULE_LICENSE("GPL"); |
| 150 | |
| 151 | module_param(debug, int, 0); |
| 152 | module_param(rx_copybreak, int, 0); |
| 153 | module_param_array(options, int, NULL, 0); |
| 154 | module_param_array(full_duplex, int, NULL, 0); |
| 155 | MODULE_PARM_DESC(debug, "EPIC/100 debug level (0-5)"); |
| 156 | MODULE_PARM_DESC(options, "EPIC/100: Bits 0-3: media type, bit 4: full duplex"); |
| 157 | MODULE_PARM_DESC(rx_copybreak, "EPIC/100 copy breakpoint for copy-only-tiny-frames"); |
| 158 | MODULE_PARM_DESC(full_duplex, "EPIC/100 full duplex setting(s) (1)"); |
| 159 | |
| 160 | /* |
| 161 | Theory of Operation |
| 162 | |
| 163 | I. Board Compatibility |
| 164 | |
| 165 | This device driver is designed for the SMC "EPIC/100", the SMC |
| 166 | single-chip Ethernet controllers for PCI. This chip is used on |
| 167 | the SMC EtherPower II boards. |
| 168 | |
| 169 | II. Board-specific settings |
| 170 | |
| 171 | PCI bus devices are configured by the system at boot time, so no jumpers |
| 172 | need to be set on the board. The system BIOS will assign the |
| 173 | PCI INTA signal to a (preferably otherwise unused) system IRQ line. |
| 174 | Note: Kernel versions earlier than 1.3.73 do not support shared PCI |
| 175 | interrupt lines. |
| 176 | |
| 177 | III. Driver operation |
| 178 | |
| 179 | IIIa. Ring buffers |
| 180 | |
| 181 | IVb. References |
| 182 | |
| 183 | http://www.smsc.com/main/datasheets/83c171.pdf |
| 184 | http://www.smsc.com/main/datasheets/83c175.pdf |
| 185 | http://scyld.com/expert/NWay.html |
| 186 | http://www.national.com/pf/DP/DP83840A.html |
| 187 | |
| 188 | IVc. Errata |
| 189 | |
| 190 | */ |
| 191 | |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | enum chip_capability_flags { MII_PWRDWN=1, TYPE2_INTR=2, NO_MII=4 }; |
| 194 | |
| 195 | #define EPIC_TOTAL_SIZE 0x100 |
| 196 | #define USE_IO_OPS 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | typedef enum { |
| 199 | SMSC_83C170_0, |
| 200 | SMSC_83C170, |
| 201 | SMSC_83C175, |
| 202 | } chip_t; |
| 203 | |
| 204 | |
| 205 | struct epic_chip_info { |
| 206 | const char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | int io_size; /* Needed for I/O region check or ioremap(). */ |
| 208 | int drv_flags; /* Driver use, intended as capability flags. */ |
| 209 | }; |
| 210 | |
| 211 | |
| 212 | /* indexed by chip_t */ |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 213 | static const struct epic_chip_info pci_id_tbl[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { "SMSC EPIC/100 83c170", |
Jeff Garzik | 1f1bd5f | 2006-06-26 23:47:50 -0400 | [diff] [blame] | 215 | EPIC_TOTAL_SIZE, TYPE2_INTR | NO_MII | MII_PWRDWN }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | { "SMSC EPIC/100 83c170", |
Jeff Garzik | 1f1bd5f | 2006-06-26 23:47:50 -0400 | [diff] [blame] | 217 | EPIC_TOTAL_SIZE, TYPE2_INTR }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | { "SMSC EPIC/C 83c175", |
Jeff Garzik | 1f1bd5f | 2006-06-26 23:47:50 -0400 | [diff] [blame] | 219 | EPIC_TOTAL_SIZE, TYPE2_INTR | MII_PWRDWN }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | }; |
| 221 | |
| 222 | |
| 223 | static struct pci_device_id epic_pci_tbl[] = { |
| 224 | { 0x10B8, 0x0005, 0x1092, 0x0AB4, 0, 0, SMSC_83C170_0 }, |
| 225 | { 0x10B8, 0x0005, PCI_ANY_ID, PCI_ANY_ID, 0, 0, SMSC_83C170 }, |
| 226 | { 0x10B8, 0x0006, PCI_ANY_ID, PCI_ANY_ID, |
| 227 | PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, SMSC_83C175 }, |
| 228 | { 0,} |
| 229 | }; |
| 230 | MODULE_DEVICE_TABLE (pci, epic_pci_tbl); |
| 231 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | #ifndef USE_IO_OPS |
| 234 | #undef inb |
| 235 | #undef inw |
| 236 | #undef inl |
| 237 | #undef outb |
| 238 | #undef outw |
| 239 | #undef outl |
| 240 | #define inb readb |
| 241 | #define inw readw |
| 242 | #define inl readl |
| 243 | #define outb writeb |
| 244 | #define outw writew |
| 245 | #define outl writel |
| 246 | #endif |
| 247 | |
| 248 | /* Offsets to registers, using the (ugh) SMC names. */ |
| 249 | enum epic_registers { |
| 250 | COMMAND=0, INTSTAT=4, INTMASK=8, GENCTL=0x0C, NVCTL=0x10, EECTL=0x14, |
| 251 | PCIBurstCnt=0x18, |
| 252 | TEST1=0x1C, CRCCNT=0x20, ALICNT=0x24, MPCNT=0x28, /* Rx error counters. */ |
| 253 | MIICtrl=0x30, MIIData=0x34, MIICfg=0x38, |
| 254 | LAN0=64, /* MAC address. */ |
| 255 | MC0=80, /* Multicast filter table. */ |
| 256 | RxCtrl=96, TxCtrl=112, TxSTAT=0x74, |
| 257 | PRxCDAR=0x84, RxSTAT=0xA4, EarlyRx=0xB0, PTxCDAR=0xC4, TxThresh=0xDC, |
| 258 | }; |
| 259 | |
| 260 | /* Interrupt register bits, using my own meaningful names. */ |
| 261 | enum IntrStatus { |
| 262 | TxIdle=0x40000, RxIdle=0x20000, IntrSummary=0x010000, |
| 263 | PCIBusErr170=0x7000, PCIBusErr175=0x1000, PhyEvent175=0x8000, |
| 264 | RxStarted=0x0800, RxEarlyWarn=0x0400, CntFull=0x0200, TxUnderrun=0x0100, |
| 265 | TxEmpty=0x0080, TxDone=0x0020, RxError=0x0010, |
| 266 | RxOverflow=0x0008, RxFull=0x0004, RxHeader=0x0002, RxDone=0x0001, |
| 267 | }; |
| 268 | enum CommandBits { |
| 269 | StopRx=1, StartRx=2, TxQueued=4, RxQueued=8, |
| 270 | StopTxDMA=0x20, StopRxDMA=0x40, RestartTx=0x80, |
| 271 | }; |
| 272 | |
| 273 | #define EpicRemoved 0xffffffff /* Chip failed or removed (CardBus) */ |
| 274 | |
| 275 | #define EpicNapiEvent (TxEmpty | TxDone | \ |
| 276 | RxDone | RxStarted | RxEarlyWarn | RxOverflow | RxFull) |
| 277 | #define EpicNormalEvent (0x0000ffff & ~EpicNapiEvent) |
| 278 | |
Arjan van de Ven | f71e130 | 2006-03-03 21:33:57 -0500 | [diff] [blame] | 279 | static const u16 media2miictl[16] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | 0, 0x0C00, 0x0C00, 0x2000, 0x0100, 0x2100, 0, 0, |
| 281 | 0, 0, 0, 0, 0, 0, 0, 0 }; |
| 282 | |
| 283 | /* The EPIC100 Rx and Tx buffer descriptors. */ |
| 284 | |
| 285 | struct epic_tx_desc { |
| 286 | u32 txstatus; |
| 287 | u32 bufaddr; |
| 288 | u32 buflength; |
| 289 | u32 next; |
| 290 | }; |
| 291 | |
| 292 | struct epic_rx_desc { |
| 293 | u32 rxstatus; |
| 294 | u32 bufaddr; |
| 295 | u32 buflength; |
| 296 | u32 next; |
| 297 | }; |
| 298 | |
| 299 | enum desc_status_bits { |
| 300 | DescOwn=0x8000, |
| 301 | }; |
| 302 | |
| 303 | #define PRIV_ALIGN 15 /* Required alignment mask */ |
| 304 | struct epic_private { |
| 305 | struct epic_rx_desc *rx_ring; |
| 306 | struct epic_tx_desc *tx_ring; |
| 307 | /* The saved address of a sent-in-place packet/buffer, for skfree(). */ |
| 308 | struct sk_buff* tx_skbuff[TX_RING_SIZE]; |
| 309 | /* The addresses of receive-in-place skbuffs. */ |
| 310 | struct sk_buff* rx_skbuff[RX_RING_SIZE]; |
| 311 | |
| 312 | dma_addr_t tx_ring_dma; |
| 313 | dma_addr_t rx_ring_dma; |
| 314 | |
| 315 | /* Ring pointers. */ |
| 316 | spinlock_t lock; /* Group with Tx control cache line. */ |
| 317 | spinlock_t napi_lock; |
| 318 | unsigned int reschedule_in_poll; |
| 319 | unsigned int cur_tx, dirty_tx; |
| 320 | |
| 321 | unsigned int cur_rx, dirty_rx; |
| 322 | u32 irq_mask; |
| 323 | unsigned int rx_buf_sz; /* Based on MTU+slack. */ |
| 324 | |
| 325 | struct pci_dev *pci_dev; /* PCI bus location. */ |
| 326 | int chip_id, chip_flags; |
| 327 | |
| 328 | struct net_device_stats stats; |
| 329 | struct timer_list timer; /* Media selection timer. */ |
| 330 | int tx_threshold; |
| 331 | unsigned char mc_filter[8]; |
| 332 | signed char phys[4]; /* MII device addresses. */ |
| 333 | u16 advertising; /* NWay media advertisement */ |
| 334 | int mii_phy_cnt; |
| 335 | struct mii_if_info mii; |
| 336 | unsigned int tx_full:1; /* The Tx queue is full. */ |
| 337 | unsigned int default_port:4; /* Last dev->if_port value. */ |
| 338 | }; |
| 339 | |
| 340 | static int epic_open(struct net_device *dev); |
| 341 | static int read_eeprom(long ioaddr, int location); |
| 342 | static int mdio_read(struct net_device *dev, int phy_id, int location); |
| 343 | static void mdio_write(struct net_device *dev, int phy_id, int loc, int val); |
| 344 | static void epic_restart(struct net_device *dev); |
| 345 | static void epic_timer(unsigned long data); |
| 346 | static void epic_tx_timeout(struct net_device *dev); |
| 347 | static void epic_init_ring(struct net_device *dev); |
| 348 | static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev); |
| 349 | static int epic_rx(struct net_device *dev, int budget); |
| 350 | static int epic_poll(struct net_device *dev, int *budget); |
| 351 | static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *regs); |
| 352 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
| 353 | static struct ethtool_ops netdev_ethtool_ops; |
| 354 | static int epic_close(struct net_device *dev); |
| 355 | static struct net_device_stats *epic_get_stats(struct net_device *dev); |
| 356 | static void set_rx_mode(struct net_device *dev); |
| 357 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | static int __devinit epic_init_one (struct pci_dev *pdev, |
| 361 | const struct pci_device_id *ent) |
| 362 | { |
| 363 | static int card_idx = -1; |
| 364 | long ioaddr; |
| 365 | int chip_idx = (int) ent->driver_data; |
| 366 | int irq; |
| 367 | struct net_device *dev; |
| 368 | struct epic_private *ep; |
| 369 | int i, ret, option = 0, duplex = 0; |
| 370 | void *ring_space; |
| 371 | dma_addr_t ring_dma; |
| 372 | |
| 373 | /* when built into the kernel, we only print version if device is found */ |
| 374 | #ifndef MODULE |
| 375 | static int printed_version; |
| 376 | if (!printed_version++) |
| 377 | printk (KERN_INFO "%s" KERN_INFO "%s" KERN_INFO "%s", |
| 378 | version, version2, version3); |
| 379 | #endif |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | card_idx++; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | ret = pci_enable_device(pdev); |
| 384 | if (ret) |
| 385 | goto out; |
| 386 | irq = pdev->irq; |
| 387 | |
| 388 | if (pci_resource_len(pdev, 0) < pci_id_tbl[chip_idx].io_size) { |
| 389 | printk (KERN_ERR "card %d: no PCI region space\n", card_idx); |
| 390 | ret = -ENODEV; |
| 391 | goto err_out_disable; |
| 392 | } |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | pci_set_master(pdev); |
| 395 | |
| 396 | ret = pci_request_regions(pdev, DRV_NAME); |
| 397 | if (ret < 0) |
| 398 | goto err_out_disable; |
| 399 | |
| 400 | ret = -ENOMEM; |
| 401 | |
| 402 | dev = alloc_etherdev(sizeof (*ep)); |
| 403 | if (!dev) { |
| 404 | printk (KERN_ERR "card %d: no memory for eth device\n", card_idx); |
| 405 | goto err_out_free_res; |
| 406 | } |
| 407 | SET_MODULE_OWNER(dev); |
| 408 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 409 | |
| 410 | #ifdef USE_IO_OPS |
| 411 | ioaddr = pci_resource_start (pdev, 0); |
| 412 | #else |
| 413 | ioaddr = pci_resource_start (pdev, 1); |
| 414 | ioaddr = (long) ioremap (ioaddr, pci_resource_len (pdev, 1)); |
| 415 | if (!ioaddr) { |
| 416 | printk (KERN_ERR DRV_NAME " %d: ioremap failed\n", card_idx); |
| 417 | goto err_out_free_netdev; |
| 418 | } |
| 419 | #endif |
| 420 | |
| 421 | pci_set_drvdata(pdev, dev); |
| 422 | ep = dev->priv; |
| 423 | ep->mii.dev = dev; |
| 424 | ep->mii.mdio_read = mdio_read; |
| 425 | ep->mii.mdio_write = mdio_write; |
| 426 | ep->mii.phy_id_mask = 0x1f; |
| 427 | ep->mii.reg_num_mask = 0x1f; |
| 428 | |
| 429 | ring_space = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma); |
| 430 | if (!ring_space) |
| 431 | goto err_out_iounmap; |
| 432 | ep->tx_ring = (struct epic_tx_desc *)ring_space; |
| 433 | ep->tx_ring_dma = ring_dma; |
| 434 | |
| 435 | ring_space = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma); |
| 436 | if (!ring_space) |
| 437 | goto err_out_unmap_tx; |
| 438 | ep->rx_ring = (struct epic_rx_desc *)ring_space; |
| 439 | ep->rx_ring_dma = ring_dma; |
| 440 | |
| 441 | if (dev->mem_start) { |
| 442 | option = dev->mem_start; |
| 443 | duplex = (dev->mem_start & 16) ? 1 : 0; |
| 444 | } else if (card_idx >= 0 && card_idx < MAX_UNITS) { |
| 445 | if (options[card_idx] >= 0) |
| 446 | option = options[card_idx]; |
| 447 | if (full_duplex[card_idx] >= 0) |
| 448 | duplex = full_duplex[card_idx]; |
| 449 | } |
| 450 | |
| 451 | dev->base_addr = ioaddr; |
| 452 | dev->irq = irq; |
| 453 | |
| 454 | spin_lock_init(&ep->lock); |
| 455 | spin_lock_init(&ep->napi_lock); |
| 456 | ep->reschedule_in_poll = 0; |
| 457 | |
| 458 | /* Bring the chip out of low-power mode. */ |
| 459 | outl(0x4200, ioaddr + GENCTL); |
| 460 | /* Magic?! If we don't set this bit the MII interface won't work. */ |
| 461 | /* This magic is documented in SMSC app note 7.15 */ |
| 462 | for (i = 16; i > 0; i--) |
| 463 | outl(0x0008, ioaddr + TEST1); |
| 464 | |
| 465 | /* Turn on the MII transceiver. */ |
| 466 | outl(0x12, ioaddr + MIICfg); |
| 467 | if (chip_idx == 1) |
| 468 | outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL); |
| 469 | outl(0x0200, ioaddr + GENCTL); |
| 470 | |
| 471 | /* Note: the '175 does not have a serial EEPROM. */ |
| 472 | for (i = 0; i < 3; i++) |
| 473 | ((u16 *)dev->dev_addr)[i] = le16_to_cpu(inw(ioaddr + LAN0 + i*4)); |
| 474 | |
| 475 | if (debug > 2) { |
| 476 | printk(KERN_DEBUG DRV_NAME "(%s): EEPROM contents\n", |
| 477 | pci_name(pdev)); |
| 478 | for (i = 0; i < 64; i++) |
| 479 | printk(" %4.4x%s", read_eeprom(ioaddr, i), |
| 480 | i % 16 == 15 ? "\n" : ""); |
| 481 | } |
| 482 | |
| 483 | ep->pci_dev = pdev; |
| 484 | ep->chip_id = chip_idx; |
| 485 | ep->chip_flags = pci_id_tbl[chip_idx].drv_flags; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 486 | ep->irq_mask = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | (ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170) |
| 488 | | CntFull | TxUnderrun | EpicNapiEvent; |
| 489 | |
| 490 | /* Find the connected MII xcvrs. |
| 491 | Doing this in open() would allow detecting external xcvrs later, but |
| 492 | takes much time and no cards have external MII. */ |
| 493 | { |
| 494 | int phy, phy_idx = 0; |
| 495 | for (phy = 1; phy < 32 && phy_idx < sizeof(ep->phys); phy++) { |
| 496 | int mii_status = mdio_read(dev, phy, MII_BMSR); |
| 497 | if (mii_status != 0xffff && mii_status != 0x0000) { |
| 498 | ep->phys[phy_idx++] = phy; |
| 499 | printk(KERN_INFO DRV_NAME "(%s): MII transceiver #%d control " |
| 500 | "%4.4x status %4.4x.\n", |
| 501 | pci_name(pdev), phy, mdio_read(dev, phy, 0), mii_status); |
| 502 | } |
| 503 | } |
| 504 | ep->mii_phy_cnt = phy_idx; |
| 505 | if (phy_idx != 0) { |
| 506 | phy = ep->phys[0]; |
| 507 | ep->mii.advertising = mdio_read(dev, phy, MII_ADVERTISE); |
| 508 | printk(KERN_INFO DRV_NAME "(%s): Autonegotiation advertising %4.4x link " |
| 509 | "partner %4.4x.\n", |
| 510 | pci_name(pdev), ep->mii.advertising, mdio_read(dev, phy, 5)); |
| 511 | } else if ( ! (ep->chip_flags & NO_MII)) { |
| 512 | printk(KERN_WARNING DRV_NAME "(%s): ***WARNING***: No MII transceiver found!\n", |
| 513 | pci_name(pdev)); |
| 514 | /* Use the known PHY address of the EPII. */ |
| 515 | ep->phys[0] = 3; |
| 516 | } |
| 517 | ep->mii.phy_id = ep->phys[0]; |
| 518 | } |
| 519 | |
| 520 | /* Turn off the MII xcvr (175 only!), leave the chip in low-power mode. */ |
| 521 | if (ep->chip_flags & MII_PWRDWN) |
| 522 | outl(inl(ioaddr + NVCTL) & ~0x483C, ioaddr + NVCTL); |
| 523 | outl(0x0008, ioaddr + GENCTL); |
| 524 | |
| 525 | /* The lower four bits are the media type. */ |
| 526 | if (duplex) { |
| 527 | ep->mii.force_media = ep->mii.full_duplex = 1; |
| 528 | printk(KERN_INFO DRV_NAME "(%s): Forced full duplex operation requested.\n", |
| 529 | pci_name(pdev)); |
| 530 | } |
| 531 | dev->if_port = ep->default_port = option; |
| 532 | |
| 533 | /* The Epic-specific entries in the device structure. */ |
| 534 | dev->open = &epic_open; |
| 535 | dev->hard_start_xmit = &epic_start_xmit; |
| 536 | dev->stop = &epic_close; |
| 537 | dev->get_stats = &epic_get_stats; |
| 538 | dev->set_multicast_list = &set_rx_mode; |
| 539 | dev->do_ioctl = &netdev_ioctl; |
| 540 | dev->ethtool_ops = &netdev_ethtool_ops; |
| 541 | dev->watchdog_timeo = TX_TIMEOUT; |
| 542 | dev->tx_timeout = &epic_tx_timeout; |
| 543 | dev->poll = epic_poll; |
| 544 | dev->weight = 64; |
| 545 | |
| 546 | ret = register_netdev(dev); |
| 547 | if (ret < 0) |
| 548 | goto err_out_unmap_rx; |
| 549 | |
| 550 | printk(KERN_INFO "%s: %s at %#lx, IRQ %d, ", |
| 551 | dev->name, pci_id_tbl[chip_idx].name, ioaddr, dev->irq); |
| 552 | for (i = 0; i < 5; i++) |
| 553 | printk("%2.2x:", dev->dev_addr[i]); |
| 554 | printk("%2.2x.\n", dev->dev_addr[i]); |
| 555 | |
| 556 | out: |
| 557 | return ret; |
| 558 | |
| 559 | err_out_unmap_rx: |
| 560 | pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma); |
| 561 | err_out_unmap_tx: |
| 562 | pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma); |
| 563 | err_out_iounmap: |
| 564 | #ifndef USE_IO_OPS |
| 565 | iounmap(ioaddr); |
| 566 | err_out_free_netdev: |
| 567 | #endif |
| 568 | free_netdev(dev); |
| 569 | err_out_free_res: |
| 570 | pci_release_regions(pdev); |
| 571 | err_out_disable: |
| 572 | pci_disable_device(pdev); |
| 573 | goto out; |
| 574 | } |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | /* Serial EEPROM section. */ |
| 577 | |
| 578 | /* EEPROM_Ctrl bits. */ |
| 579 | #define EE_SHIFT_CLK 0x04 /* EEPROM shift clock. */ |
| 580 | #define EE_CS 0x02 /* EEPROM chip select. */ |
| 581 | #define EE_DATA_WRITE 0x08 /* EEPROM chip data in. */ |
| 582 | #define EE_WRITE_0 0x01 |
| 583 | #define EE_WRITE_1 0x09 |
| 584 | #define EE_DATA_READ 0x10 /* EEPROM chip data out. */ |
| 585 | #define EE_ENB (0x0001 | EE_CS) |
| 586 | |
| 587 | /* Delay between EEPROM clock transitions. |
| 588 | This serves to flush the operation to the PCI bus. |
| 589 | */ |
| 590 | |
| 591 | #define eeprom_delay() inl(ee_addr) |
| 592 | |
| 593 | /* The EEPROM commands include the alway-set leading bit. */ |
| 594 | #define EE_WRITE_CMD (5 << 6) |
| 595 | #define EE_READ64_CMD (6 << 6) |
| 596 | #define EE_READ256_CMD (6 << 8) |
| 597 | #define EE_ERASE_CMD (7 << 6) |
| 598 | |
| 599 | static void epic_disable_int(struct net_device *dev, struct epic_private *ep) |
| 600 | { |
| 601 | long ioaddr = dev->base_addr; |
| 602 | |
| 603 | outl(0x00000000, ioaddr + INTMASK); |
| 604 | } |
| 605 | |
| 606 | static inline void __epic_pci_commit(long ioaddr) |
| 607 | { |
| 608 | #ifndef USE_IO_OPS |
| 609 | inl(ioaddr + INTMASK); |
| 610 | #endif |
| 611 | } |
| 612 | |
| 613 | static inline void epic_napi_irq_off(struct net_device *dev, |
| 614 | struct epic_private *ep) |
| 615 | { |
| 616 | long ioaddr = dev->base_addr; |
| 617 | |
| 618 | outl(ep->irq_mask & ~EpicNapiEvent, ioaddr + INTMASK); |
| 619 | __epic_pci_commit(ioaddr); |
| 620 | } |
| 621 | |
| 622 | static inline void epic_napi_irq_on(struct net_device *dev, |
| 623 | struct epic_private *ep) |
| 624 | { |
| 625 | long ioaddr = dev->base_addr; |
| 626 | |
| 627 | /* No need to commit possible posted write */ |
| 628 | outl(ep->irq_mask | EpicNapiEvent, ioaddr + INTMASK); |
| 629 | } |
| 630 | |
| 631 | static int __devinit read_eeprom(long ioaddr, int location) |
| 632 | { |
| 633 | int i; |
| 634 | int retval = 0; |
| 635 | long ee_addr = ioaddr + EECTL; |
| 636 | int read_cmd = location | |
| 637 | (inl(ee_addr) & 0x40 ? EE_READ64_CMD : EE_READ256_CMD); |
| 638 | |
| 639 | outl(EE_ENB & ~EE_CS, ee_addr); |
| 640 | outl(EE_ENB, ee_addr); |
| 641 | |
| 642 | /* Shift the read command bits out. */ |
| 643 | for (i = 12; i >= 0; i--) { |
| 644 | short dataval = (read_cmd & (1 << i)) ? EE_WRITE_1 : EE_WRITE_0; |
| 645 | outl(EE_ENB | dataval, ee_addr); |
| 646 | eeprom_delay(); |
| 647 | outl(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr); |
| 648 | eeprom_delay(); |
| 649 | } |
| 650 | outl(EE_ENB, ee_addr); |
| 651 | |
| 652 | for (i = 16; i > 0; i--) { |
| 653 | outl(EE_ENB | EE_SHIFT_CLK, ee_addr); |
| 654 | eeprom_delay(); |
| 655 | retval = (retval << 1) | ((inl(ee_addr) & EE_DATA_READ) ? 1 : 0); |
| 656 | outl(EE_ENB, ee_addr); |
| 657 | eeprom_delay(); |
| 658 | } |
| 659 | |
| 660 | /* Terminate the EEPROM access. */ |
| 661 | outl(EE_ENB & ~EE_CS, ee_addr); |
| 662 | return retval; |
| 663 | } |
| 664 | |
| 665 | #define MII_READOP 1 |
| 666 | #define MII_WRITEOP 2 |
| 667 | static int mdio_read(struct net_device *dev, int phy_id, int location) |
| 668 | { |
| 669 | long ioaddr = dev->base_addr; |
| 670 | int read_cmd = (phy_id << 9) | (location << 4) | MII_READOP; |
| 671 | int i; |
| 672 | |
| 673 | outl(read_cmd, ioaddr + MIICtrl); |
| 674 | /* Typical operation takes 25 loops. */ |
| 675 | for (i = 400; i > 0; i--) { |
| 676 | barrier(); |
| 677 | if ((inl(ioaddr + MIICtrl) & MII_READOP) == 0) { |
| 678 | /* Work around read failure bug. */ |
| 679 | if (phy_id == 1 && location < 6 |
| 680 | && inw(ioaddr + MIIData) == 0xffff) { |
| 681 | outl(read_cmd, ioaddr + MIICtrl); |
| 682 | continue; |
| 683 | } |
| 684 | return inw(ioaddr + MIIData); |
| 685 | } |
| 686 | } |
| 687 | return 0xffff; |
| 688 | } |
| 689 | |
| 690 | static void mdio_write(struct net_device *dev, int phy_id, int loc, int value) |
| 691 | { |
| 692 | long ioaddr = dev->base_addr; |
| 693 | int i; |
| 694 | |
| 695 | outw(value, ioaddr + MIIData); |
| 696 | outl((phy_id << 9) | (loc << 4) | MII_WRITEOP, ioaddr + MIICtrl); |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 697 | for (i = 10000; i > 0; i--) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | barrier(); |
| 699 | if ((inl(ioaddr + MIICtrl) & MII_WRITEOP) == 0) |
| 700 | break; |
| 701 | } |
| 702 | return; |
| 703 | } |
| 704 | |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | static int epic_open(struct net_device *dev) |
| 707 | { |
| 708 | struct epic_private *ep = dev->priv; |
| 709 | long ioaddr = dev->base_addr; |
| 710 | int i; |
| 711 | int retval; |
| 712 | |
| 713 | /* Soft reset the chip. */ |
| 714 | outl(0x4001, ioaddr + GENCTL); |
| 715 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame^] | 716 | if ((retval = request_irq(dev->irq, &epic_interrupt, IRQF_SHARED, dev->name, dev))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | return retval; |
| 718 | |
| 719 | epic_init_ring(dev); |
| 720 | |
| 721 | outl(0x4000, ioaddr + GENCTL); |
| 722 | /* This magic is documented in SMSC app note 7.15 */ |
| 723 | for (i = 16; i > 0; i--) |
| 724 | outl(0x0008, ioaddr + TEST1); |
| 725 | |
| 726 | /* Pull the chip out of low-power mode, enable interrupts, and set for |
| 727 | PCI read multiple. The MIIcfg setting and strange write order are |
| 728 | required by the details of which bits are reset and the transceiver |
| 729 | wiring on the Ositech CardBus card. |
| 730 | */ |
| 731 | #if 0 |
| 732 | outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg); |
| 733 | #endif |
| 734 | if (ep->chip_flags & MII_PWRDWN) |
| 735 | outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL); |
| 736 | |
| 737 | #if defined(__powerpc__) || defined(__sparc__) /* Big endian */ |
| 738 | outl(0x4432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 739 | inl(ioaddr + GENCTL); |
| 740 | outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 741 | #else |
| 742 | outl(0x4412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 743 | inl(ioaddr + GENCTL); |
| 744 | outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 745 | #endif |
| 746 | |
| 747 | udelay(20); /* Looks like EPII needs that if you want reliable RX init. FIXME: pci posting bug? */ |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 748 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | for (i = 0; i < 3; i++) |
| 750 | outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4); |
| 751 | |
| 752 | ep->tx_threshold = TX_FIFO_THRESH; |
| 753 | outl(ep->tx_threshold, ioaddr + TxThresh); |
| 754 | |
| 755 | if (media2miictl[dev->if_port & 15]) { |
| 756 | if (ep->mii_phy_cnt) |
| 757 | mdio_write(dev, ep->phys[0], MII_BMCR, media2miictl[dev->if_port&15]); |
| 758 | if (dev->if_port == 1) { |
| 759 | if (debug > 1) |
| 760 | printk(KERN_INFO "%s: Using the 10base2 transceiver, MII " |
| 761 | "status %4.4x.\n", |
| 762 | dev->name, mdio_read(dev, ep->phys[0], MII_BMSR)); |
| 763 | } |
| 764 | } else { |
| 765 | int mii_lpa = mdio_read(dev, ep->phys[0], MII_LPA); |
| 766 | if (mii_lpa != 0xffff) { |
| 767 | if ((mii_lpa & LPA_100FULL) || (mii_lpa & 0x01C0) == LPA_10FULL) |
| 768 | ep->mii.full_duplex = 1; |
| 769 | else if (! (mii_lpa & LPA_LPACK)) |
| 770 | mdio_write(dev, ep->phys[0], MII_BMCR, BMCR_ANENABLE|BMCR_ANRESTART); |
| 771 | if (debug > 1) |
| 772 | printk(KERN_INFO "%s: Setting %s-duplex based on MII xcvr %d" |
| 773 | " register read of %4.4x.\n", dev->name, |
| 774 | ep->mii.full_duplex ? "full" : "half", |
| 775 | ep->phys[0], mii_lpa); |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl); |
| 780 | outl(ep->rx_ring_dma, ioaddr + PRxCDAR); |
| 781 | outl(ep->tx_ring_dma, ioaddr + PTxCDAR); |
| 782 | |
| 783 | /* Start the chip's Rx process. */ |
| 784 | set_rx_mode(dev); |
| 785 | outl(StartRx | RxQueued, ioaddr + COMMAND); |
| 786 | |
| 787 | netif_start_queue(dev); |
| 788 | |
| 789 | /* Enable interrupts by setting the interrupt mask. */ |
| 790 | outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170) |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 791 | | CntFull | TxUnderrun |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK); |
| 793 | |
| 794 | if (debug > 1) |
| 795 | printk(KERN_DEBUG "%s: epic_open() ioaddr %lx IRQ %d status %4.4x " |
| 796 | "%s-duplex.\n", |
| 797 | dev->name, ioaddr, dev->irq, (int)inl(ioaddr + GENCTL), |
| 798 | ep->mii.full_duplex ? "full" : "half"); |
| 799 | |
| 800 | /* Set the timer to switch to check for link beat and perhaps switch |
| 801 | to an alternate media type. */ |
| 802 | init_timer(&ep->timer); |
| 803 | ep->timer.expires = jiffies + 3*HZ; |
| 804 | ep->timer.data = (unsigned long)dev; |
| 805 | ep->timer.function = &epic_timer; /* timer handler */ |
| 806 | add_timer(&ep->timer); |
| 807 | |
| 808 | return 0; |
| 809 | } |
| 810 | |
| 811 | /* Reset the chip to recover from a PCI transaction error. |
| 812 | This may occur at interrupt time. */ |
| 813 | static void epic_pause(struct net_device *dev) |
| 814 | { |
| 815 | long ioaddr = dev->base_addr; |
| 816 | struct epic_private *ep = dev->priv; |
| 817 | |
| 818 | netif_stop_queue (dev); |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | /* Disable interrupts by clearing the interrupt mask. */ |
| 821 | outl(0x00000000, ioaddr + INTMASK); |
| 822 | /* Stop the chip's Tx and Rx DMA processes. */ |
| 823 | outw(StopRx | StopTxDMA | StopRxDMA, ioaddr + COMMAND); |
| 824 | |
| 825 | /* Update the error counts. */ |
| 826 | if (inw(ioaddr + COMMAND) != 0xffff) { |
| 827 | ep->stats.rx_missed_errors += inb(ioaddr + MPCNT); |
| 828 | ep->stats.rx_frame_errors += inb(ioaddr + ALICNT); |
| 829 | ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT); |
| 830 | } |
| 831 | |
| 832 | /* Remove the packets on the Rx queue. */ |
| 833 | epic_rx(dev, RX_RING_SIZE); |
| 834 | } |
| 835 | |
| 836 | static void epic_restart(struct net_device *dev) |
| 837 | { |
| 838 | long ioaddr = dev->base_addr; |
| 839 | struct epic_private *ep = dev->priv; |
| 840 | int i; |
| 841 | |
| 842 | /* Soft reset the chip. */ |
| 843 | outl(0x4001, ioaddr + GENCTL); |
| 844 | |
| 845 | printk(KERN_DEBUG "%s: Restarting the EPIC chip, Rx %d/%d Tx %d/%d.\n", |
| 846 | dev->name, ep->cur_rx, ep->dirty_rx, ep->dirty_tx, ep->cur_tx); |
| 847 | udelay(1); |
| 848 | |
| 849 | /* This magic is documented in SMSC app note 7.15 */ |
| 850 | for (i = 16; i > 0; i--) |
| 851 | outl(0x0008, ioaddr + TEST1); |
| 852 | |
| 853 | #if defined(__powerpc__) || defined(__sparc__) /* Big endian */ |
| 854 | outl(0x0432 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 855 | #else |
| 856 | outl(0x0412 | (RX_FIFO_THRESH<<8), ioaddr + GENCTL); |
| 857 | #endif |
| 858 | outl(dev->if_port == 1 ? 0x13 : 0x12, ioaddr + MIICfg); |
| 859 | if (ep->chip_flags & MII_PWRDWN) |
| 860 | outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL); |
| 861 | |
| 862 | for (i = 0; i < 3; i++) |
| 863 | outl(cpu_to_le16(((u16*)dev->dev_addr)[i]), ioaddr + LAN0 + i*4); |
| 864 | |
| 865 | ep->tx_threshold = TX_FIFO_THRESH; |
| 866 | outl(ep->tx_threshold, ioaddr + TxThresh); |
| 867 | outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl); |
| 868 | outl(ep->rx_ring_dma + (ep->cur_rx%RX_RING_SIZE)* |
| 869 | sizeof(struct epic_rx_desc), ioaddr + PRxCDAR); |
| 870 | outl(ep->tx_ring_dma + (ep->dirty_tx%TX_RING_SIZE)* |
| 871 | sizeof(struct epic_tx_desc), ioaddr + PTxCDAR); |
| 872 | |
| 873 | /* Start the chip's Rx process. */ |
| 874 | set_rx_mode(dev); |
| 875 | outl(StartRx | RxQueued, ioaddr + COMMAND); |
| 876 | |
| 877 | /* Enable interrupts by setting the interrupt mask. */ |
| 878 | outl((ep->chip_flags & TYPE2_INTR ? PCIBusErr175 : PCIBusErr170) |
| 879 | | CntFull | TxUnderrun |
| 880 | | RxError | RxHeader | EpicNapiEvent, ioaddr + INTMASK); |
| 881 | |
| 882 | printk(KERN_DEBUG "%s: epic_restart() done, cmd status %4.4x, ctl %4.4x" |
| 883 | " interrupt %4.4x.\n", |
| 884 | dev->name, (int)inl(ioaddr + COMMAND), (int)inl(ioaddr + GENCTL), |
| 885 | (int)inl(ioaddr + INTSTAT)); |
| 886 | return; |
| 887 | } |
| 888 | |
| 889 | static void check_media(struct net_device *dev) |
| 890 | { |
| 891 | struct epic_private *ep = dev->priv; |
| 892 | long ioaddr = dev->base_addr; |
| 893 | int mii_lpa = ep->mii_phy_cnt ? mdio_read(dev, ep->phys[0], MII_LPA) : 0; |
| 894 | int negotiated = mii_lpa & ep->mii.advertising; |
| 895 | int duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040; |
| 896 | |
| 897 | if (ep->mii.force_media) |
| 898 | return; |
| 899 | if (mii_lpa == 0xffff) /* Bogus read */ |
| 900 | return; |
| 901 | if (ep->mii.full_duplex != duplex) { |
| 902 | ep->mii.full_duplex = duplex; |
| 903 | printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d link" |
| 904 | " partner capability of %4.4x.\n", dev->name, |
| 905 | ep->mii.full_duplex ? "full" : "half", ep->phys[0], mii_lpa); |
| 906 | outl(ep->mii.full_duplex ? 0x7F : 0x79, ioaddr + TxCtrl); |
| 907 | } |
| 908 | } |
| 909 | |
| 910 | static void epic_timer(unsigned long data) |
| 911 | { |
| 912 | struct net_device *dev = (struct net_device *)data; |
| 913 | struct epic_private *ep = dev->priv; |
| 914 | long ioaddr = dev->base_addr; |
| 915 | int next_tick = 5*HZ; |
| 916 | |
| 917 | if (debug > 3) { |
| 918 | printk(KERN_DEBUG "%s: Media monitor tick, Tx status %8.8x.\n", |
| 919 | dev->name, (int)inl(ioaddr + TxSTAT)); |
| 920 | printk(KERN_DEBUG "%s: Other registers are IntMask %4.4x " |
| 921 | "IntStatus %4.4x RxStatus %4.4x.\n", |
| 922 | dev->name, (int)inl(ioaddr + INTMASK), |
| 923 | (int)inl(ioaddr + INTSTAT), (int)inl(ioaddr + RxSTAT)); |
| 924 | } |
| 925 | |
| 926 | check_media(dev); |
| 927 | |
| 928 | ep->timer.expires = jiffies + next_tick; |
| 929 | add_timer(&ep->timer); |
| 930 | } |
| 931 | |
| 932 | static void epic_tx_timeout(struct net_device *dev) |
| 933 | { |
| 934 | struct epic_private *ep = dev->priv; |
| 935 | long ioaddr = dev->base_addr; |
| 936 | |
| 937 | if (debug > 0) { |
| 938 | printk(KERN_WARNING "%s: Transmit timeout using MII device, " |
| 939 | "Tx status %4.4x.\n", |
| 940 | dev->name, (int)inw(ioaddr + TxSTAT)); |
| 941 | if (debug > 1) { |
| 942 | printk(KERN_DEBUG "%s: Tx indices: dirty_tx %d, cur_tx %d.\n", |
| 943 | dev->name, ep->dirty_tx, ep->cur_tx); |
| 944 | } |
| 945 | } |
| 946 | if (inw(ioaddr + TxSTAT) & 0x10) { /* Tx FIFO underflow. */ |
| 947 | ep->stats.tx_fifo_errors++; |
| 948 | outl(RestartTx, ioaddr + COMMAND); |
| 949 | } else { |
| 950 | epic_restart(dev); |
| 951 | outl(TxQueued, dev->base_addr + COMMAND); |
| 952 | } |
| 953 | |
| 954 | dev->trans_start = jiffies; |
| 955 | ep->stats.tx_errors++; |
| 956 | if (!ep->tx_full) |
| 957 | netif_wake_queue(dev); |
| 958 | } |
| 959 | |
| 960 | /* Initialize the Rx and Tx rings, along with various 'dev' bits. */ |
| 961 | static void epic_init_ring(struct net_device *dev) |
| 962 | { |
| 963 | struct epic_private *ep = dev->priv; |
| 964 | int i; |
| 965 | |
| 966 | ep->tx_full = 0; |
| 967 | ep->dirty_tx = ep->cur_tx = 0; |
| 968 | ep->cur_rx = ep->dirty_rx = 0; |
| 969 | ep->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32); |
| 970 | |
| 971 | /* Initialize all Rx descriptors. */ |
| 972 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 973 | ep->rx_ring[i].rxstatus = 0; |
| 974 | ep->rx_ring[i].buflength = cpu_to_le32(ep->rx_buf_sz); |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 975 | ep->rx_ring[i].next = ep->rx_ring_dma + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | (i+1)*sizeof(struct epic_rx_desc); |
| 977 | ep->rx_skbuff[i] = NULL; |
| 978 | } |
| 979 | /* Mark the last entry as wrapping the ring. */ |
| 980 | ep->rx_ring[i-1].next = ep->rx_ring_dma; |
| 981 | |
| 982 | /* Fill in the Rx buffers. Handle allocation failure gracefully. */ |
| 983 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 984 | struct sk_buff *skb = dev_alloc_skb(ep->rx_buf_sz); |
| 985 | ep->rx_skbuff[i] = skb; |
| 986 | if (skb == NULL) |
| 987 | break; |
| 988 | skb->dev = dev; /* Mark as being used by this device. */ |
| 989 | skb_reserve(skb, 2); /* 16 byte align the IP header. */ |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 990 | ep->rx_ring[i].bufaddr = pci_map_single(ep->pci_dev, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 991 | skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | ep->rx_ring[i].rxstatus = cpu_to_le32(DescOwn); |
| 993 | } |
| 994 | ep->dirty_rx = (unsigned int)(i - RX_RING_SIZE); |
| 995 | |
| 996 | /* The Tx buffer descriptor is filled in as needed, but we |
| 997 | do need to clear the ownership bit. */ |
| 998 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 999 | ep->tx_skbuff[i] = NULL; |
| 1000 | ep->tx_ring[i].txstatus = 0x0000; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1001 | ep->tx_ring[i].next = ep->tx_ring_dma + |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | (i+1)*sizeof(struct epic_tx_desc); |
| 1003 | } |
| 1004 | ep->tx_ring[i-1].next = ep->tx_ring_dma; |
| 1005 | return; |
| 1006 | } |
| 1007 | |
| 1008 | static int epic_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1009 | { |
| 1010 | struct epic_private *ep = dev->priv; |
| 1011 | int entry, free_count; |
| 1012 | u32 ctrl_word; |
| 1013 | unsigned long flags; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1014 | |
Herbert Xu | 5b057c6 | 2006-06-23 02:06:41 -0700 | [diff] [blame] | 1015 | if (skb_padto(skb, ETH_ZLEN)) |
| 1016 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
| 1018 | /* Caution: the write order is important here, set the field with the |
| 1019 | "ownership" bit last. */ |
| 1020 | |
| 1021 | /* Calculate the next Tx descriptor entry. */ |
| 1022 | spin_lock_irqsave(&ep->lock, flags); |
| 1023 | free_count = ep->cur_tx - ep->dirty_tx; |
| 1024 | entry = ep->cur_tx % TX_RING_SIZE; |
| 1025 | |
| 1026 | ep->tx_skbuff[entry] = skb; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1027 | ep->tx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, skb->data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | skb->len, PCI_DMA_TODEVICE); |
| 1029 | if (free_count < TX_QUEUE_LEN/2) {/* Typical path */ |
| 1030 | ctrl_word = cpu_to_le32(0x100000); /* No interrupt */ |
| 1031 | } else if (free_count == TX_QUEUE_LEN/2) { |
| 1032 | ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */ |
| 1033 | } else if (free_count < TX_QUEUE_LEN - 1) { |
| 1034 | ctrl_word = cpu_to_le32(0x100000); /* No Tx-done intr. */ |
| 1035 | } else { |
| 1036 | /* Leave room for an additional entry. */ |
| 1037 | ctrl_word = cpu_to_le32(0x140000); /* Tx-done intr. */ |
| 1038 | ep->tx_full = 1; |
| 1039 | } |
| 1040 | ep->tx_ring[entry].buflength = ctrl_word | cpu_to_le32(skb->len); |
| 1041 | ep->tx_ring[entry].txstatus = |
| 1042 | ((skb->len >= ETH_ZLEN ? skb->len : ETH_ZLEN) << 16) |
| 1043 | | cpu_to_le32(DescOwn); |
| 1044 | |
| 1045 | ep->cur_tx++; |
| 1046 | if (ep->tx_full) |
| 1047 | netif_stop_queue(dev); |
| 1048 | |
| 1049 | spin_unlock_irqrestore(&ep->lock, flags); |
| 1050 | /* Trigger an immediate transmit demand. */ |
| 1051 | outl(TxQueued, dev->base_addr + COMMAND); |
| 1052 | |
| 1053 | dev->trans_start = jiffies; |
| 1054 | if (debug > 4) |
| 1055 | printk(KERN_DEBUG "%s: Queued Tx packet size %d to slot %d, " |
| 1056 | "flag %2.2x Tx status %8.8x.\n", |
| 1057 | dev->name, (int)skb->len, entry, ctrl_word, |
| 1058 | (int)inl(dev->base_addr + TxSTAT)); |
| 1059 | |
| 1060 | return 0; |
| 1061 | } |
| 1062 | |
| 1063 | static void epic_tx_error(struct net_device *dev, struct epic_private *ep, |
| 1064 | int status) |
| 1065 | { |
| 1066 | struct net_device_stats *stats = &ep->stats; |
| 1067 | |
| 1068 | #ifndef final_version |
| 1069 | /* There was an major error, log it. */ |
| 1070 | if (debug > 1) |
| 1071 | printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n", |
| 1072 | dev->name, status); |
| 1073 | #endif |
| 1074 | stats->tx_errors++; |
| 1075 | if (status & 0x1050) |
| 1076 | stats->tx_aborted_errors++; |
| 1077 | if (status & 0x0008) |
| 1078 | stats->tx_carrier_errors++; |
| 1079 | if (status & 0x0040) |
| 1080 | stats->tx_window_errors++; |
| 1081 | if (status & 0x0010) |
| 1082 | stats->tx_fifo_errors++; |
| 1083 | } |
| 1084 | |
| 1085 | static void epic_tx(struct net_device *dev, struct epic_private *ep) |
| 1086 | { |
| 1087 | unsigned int dirty_tx, cur_tx; |
| 1088 | |
| 1089 | /* |
| 1090 | * Note: if this lock becomes a problem we can narrow the locked |
| 1091 | * region at the cost of occasionally grabbing the lock more times. |
| 1092 | */ |
| 1093 | cur_tx = ep->cur_tx; |
| 1094 | for (dirty_tx = ep->dirty_tx; cur_tx - dirty_tx > 0; dirty_tx++) { |
| 1095 | struct sk_buff *skb; |
| 1096 | int entry = dirty_tx % TX_RING_SIZE; |
| 1097 | int txstatus = le32_to_cpu(ep->tx_ring[entry].txstatus); |
| 1098 | |
| 1099 | if (txstatus & DescOwn) |
| 1100 | break; /* It still hasn't been Txed */ |
| 1101 | |
| 1102 | if (likely(txstatus & 0x0001)) { |
| 1103 | ep->stats.collisions += (txstatus >> 8) & 15; |
| 1104 | ep->stats.tx_packets++; |
| 1105 | ep->stats.tx_bytes += ep->tx_skbuff[entry]->len; |
| 1106 | } else |
| 1107 | epic_tx_error(dev, ep, txstatus); |
| 1108 | |
| 1109 | /* Free the original skb. */ |
| 1110 | skb = ep->tx_skbuff[entry]; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1111 | pci_unmap_single(ep->pci_dev, ep->tx_ring[entry].bufaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | skb->len, PCI_DMA_TODEVICE); |
| 1113 | dev_kfree_skb_irq(skb); |
| 1114 | ep->tx_skbuff[entry] = NULL; |
| 1115 | } |
| 1116 | |
| 1117 | #ifndef final_version |
| 1118 | if (cur_tx - dirty_tx > TX_RING_SIZE) { |
| 1119 | printk(KERN_WARNING |
| 1120 | "%s: Out-of-sync dirty pointer, %d vs. %d, full=%d.\n", |
| 1121 | dev->name, dirty_tx, cur_tx, ep->tx_full); |
| 1122 | dirty_tx += TX_RING_SIZE; |
| 1123 | } |
| 1124 | #endif |
| 1125 | ep->dirty_tx = dirty_tx; |
| 1126 | if (ep->tx_full && cur_tx - dirty_tx < TX_QUEUE_LEN - 4) { |
| 1127 | /* The ring is no longer full, allow new TX entries. */ |
| 1128 | ep->tx_full = 0; |
| 1129 | netif_wake_queue(dev); |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | /* The interrupt handler does all of the Rx thread work and cleans up |
| 1134 | after the Tx thread. */ |
| 1135 | static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *regs) |
| 1136 | { |
| 1137 | struct net_device *dev = dev_instance; |
| 1138 | struct epic_private *ep = dev->priv; |
| 1139 | long ioaddr = dev->base_addr; |
| 1140 | unsigned int handled = 0; |
| 1141 | int status; |
| 1142 | |
| 1143 | status = inl(ioaddr + INTSTAT); |
| 1144 | /* Acknowledge all of the current interrupt sources ASAP. */ |
| 1145 | outl(status & EpicNormalEvent, ioaddr + INTSTAT); |
| 1146 | |
| 1147 | if (debug > 4) { |
| 1148 | printk(KERN_DEBUG "%s: Interrupt, status=%#8.8x new " |
| 1149 | "intstat=%#8.8x.\n", dev->name, status, |
| 1150 | (int)inl(ioaddr + INTSTAT)); |
| 1151 | } |
| 1152 | |
| 1153 | if ((status & IntrSummary) == 0) |
| 1154 | goto out; |
| 1155 | |
| 1156 | handled = 1; |
| 1157 | |
| 1158 | if ((status & EpicNapiEvent) && !ep->reschedule_in_poll) { |
| 1159 | spin_lock(&ep->napi_lock); |
| 1160 | if (netif_rx_schedule_prep(dev)) { |
| 1161 | epic_napi_irq_off(dev, ep); |
| 1162 | __netif_rx_schedule(dev); |
| 1163 | } else |
| 1164 | ep->reschedule_in_poll++; |
| 1165 | spin_unlock(&ep->napi_lock); |
| 1166 | } |
| 1167 | status &= ~EpicNapiEvent; |
| 1168 | |
| 1169 | /* Check uncommon events all at once. */ |
| 1170 | if (status & (CntFull | TxUnderrun | PCIBusErr170 | PCIBusErr175)) { |
| 1171 | if (status == EpicRemoved) |
| 1172 | goto out; |
| 1173 | |
| 1174 | /* Always update the error counts to avoid overhead later. */ |
| 1175 | ep->stats.rx_missed_errors += inb(ioaddr + MPCNT); |
| 1176 | ep->stats.rx_frame_errors += inb(ioaddr + ALICNT); |
| 1177 | ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT); |
| 1178 | |
| 1179 | if (status & TxUnderrun) { /* Tx FIFO underflow. */ |
| 1180 | ep->stats.tx_fifo_errors++; |
| 1181 | outl(ep->tx_threshold += 128, ioaddr + TxThresh); |
| 1182 | /* Restart the transmit process. */ |
| 1183 | outl(RestartTx, ioaddr + COMMAND); |
| 1184 | } |
| 1185 | if (status & PCIBusErr170) { |
| 1186 | printk(KERN_ERR "%s: PCI Bus Error! status %4.4x.\n", |
| 1187 | dev->name, status); |
| 1188 | epic_pause(dev); |
| 1189 | epic_restart(dev); |
| 1190 | } |
| 1191 | /* Clear all error sources. */ |
| 1192 | outl(status & 0x7f18, ioaddr + INTSTAT); |
| 1193 | } |
| 1194 | |
| 1195 | out: |
| 1196 | if (debug > 3) { |
| 1197 | printk(KERN_DEBUG "%s: exit interrupt, intr_status=%#4.4x.\n", |
| 1198 | dev->name, status); |
| 1199 | } |
| 1200 | |
| 1201 | return IRQ_RETVAL(handled); |
| 1202 | } |
| 1203 | |
| 1204 | static int epic_rx(struct net_device *dev, int budget) |
| 1205 | { |
| 1206 | struct epic_private *ep = dev->priv; |
| 1207 | int entry = ep->cur_rx % RX_RING_SIZE; |
| 1208 | int rx_work_limit = ep->dirty_rx + RX_RING_SIZE - ep->cur_rx; |
| 1209 | int work_done = 0; |
| 1210 | |
| 1211 | if (debug > 4) |
| 1212 | printk(KERN_DEBUG " In epic_rx(), entry %d %8.8x.\n", entry, |
| 1213 | ep->rx_ring[entry].rxstatus); |
| 1214 | |
| 1215 | if (rx_work_limit > budget) |
| 1216 | rx_work_limit = budget; |
| 1217 | |
| 1218 | /* If we own the next entry, it's a new packet. Send it up. */ |
| 1219 | while ((ep->rx_ring[entry].rxstatus & cpu_to_le32(DescOwn)) == 0) { |
| 1220 | int status = le32_to_cpu(ep->rx_ring[entry].rxstatus); |
| 1221 | |
| 1222 | if (debug > 4) |
| 1223 | printk(KERN_DEBUG " epic_rx() status was %8.8x.\n", status); |
| 1224 | if (--rx_work_limit < 0) |
| 1225 | break; |
| 1226 | if (status & 0x2006) { |
| 1227 | if (debug > 2) |
| 1228 | printk(KERN_DEBUG "%s: epic_rx() error status was %8.8x.\n", |
| 1229 | dev->name, status); |
| 1230 | if (status & 0x2000) { |
| 1231 | printk(KERN_WARNING "%s: Oversized Ethernet frame spanned " |
| 1232 | "multiple buffers, status %4.4x!\n", dev->name, status); |
| 1233 | ep->stats.rx_length_errors++; |
| 1234 | } else if (status & 0x0006) |
| 1235 | /* Rx Frame errors are counted in hardware. */ |
| 1236 | ep->stats.rx_errors++; |
| 1237 | } else { |
| 1238 | /* Malloc up new buffer, compatible with net-2e. */ |
| 1239 | /* Omit the four octet CRC from the length. */ |
| 1240 | short pkt_len = (status >> 16) - 4; |
| 1241 | struct sk_buff *skb; |
| 1242 | |
| 1243 | if (pkt_len > PKT_BUF_SZ - 4) { |
| 1244 | printk(KERN_ERR "%s: Oversized Ethernet frame, status %x " |
| 1245 | "%d bytes.\n", |
| 1246 | dev->name, status, pkt_len); |
| 1247 | pkt_len = 1514; |
| 1248 | } |
| 1249 | /* Check if the packet is long enough to accept without copying |
| 1250 | to a minimally-sized skbuff. */ |
| 1251 | if (pkt_len < rx_copybreak |
| 1252 | && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) { |
| 1253 | skb->dev = dev; |
| 1254 | skb_reserve(skb, 2); /* 16 byte align the IP header */ |
| 1255 | pci_dma_sync_single_for_cpu(ep->pci_dev, |
| 1256 | ep->rx_ring[entry].bufaddr, |
| 1257 | ep->rx_buf_sz, |
| 1258 | PCI_DMA_FROMDEVICE); |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 1259 | eth_copy_and_sum(skb, ep->rx_skbuff[entry]->data, pkt_len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | skb_put(skb, pkt_len); |
| 1261 | pci_dma_sync_single_for_device(ep->pci_dev, |
| 1262 | ep->rx_ring[entry].bufaddr, |
| 1263 | ep->rx_buf_sz, |
| 1264 | PCI_DMA_FROMDEVICE); |
| 1265 | } else { |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1266 | pci_unmap_single(ep->pci_dev, |
| 1267 | ep->rx_ring[entry].bufaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | ep->rx_buf_sz, PCI_DMA_FROMDEVICE); |
| 1269 | skb_put(skb = ep->rx_skbuff[entry], pkt_len); |
| 1270 | ep->rx_skbuff[entry] = NULL; |
| 1271 | } |
| 1272 | skb->protocol = eth_type_trans(skb, dev); |
| 1273 | netif_receive_skb(skb); |
| 1274 | dev->last_rx = jiffies; |
| 1275 | ep->stats.rx_packets++; |
| 1276 | ep->stats.rx_bytes += pkt_len; |
| 1277 | } |
| 1278 | work_done++; |
| 1279 | entry = (++ep->cur_rx) % RX_RING_SIZE; |
| 1280 | } |
| 1281 | |
| 1282 | /* Refill the Rx ring buffers. */ |
| 1283 | for (; ep->cur_rx - ep->dirty_rx > 0; ep->dirty_rx++) { |
| 1284 | entry = ep->dirty_rx % RX_RING_SIZE; |
| 1285 | if (ep->rx_skbuff[entry] == NULL) { |
| 1286 | struct sk_buff *skb; |
| 1287 | skb = ep->rx_skbuff[entry] = dev_alloc_skb(ep->rx_buf_sz); |
| 1288 | if (skb == NULL) |
| 1289 | break; |
| 1290 | skb->dev = dev; /* Mark as being used by this device. */ |
| 1291 | skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1292 | ep->rx_ring[entry].bufaddr = pci_map_single(ep->pci_dev, |
David S. Miller | 689be43 | 2005-06-28 15:25:31 -0700 | [diff] [blame] | 1293 | skb->data, ep->rx_buf_sz, PCI_DMA_FROMDEVICE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | work_done++; |
| 1295 | } |
| 1296 | ep->rx_ring[entry].rxstatus = cpu_to_le32(DescOwn); |
| 1297 | } |
| 1298 | return work_done; |
| 1299 | } |
| 1300 | |
| 1301 | static void epic_rx_err(struct net_device *dev, struct epic_private *ep) |
| 1302 | { |
| 1303 | long ioaddr = dev->base_addr; |
| 1304 | int status; |
| 1305 | |
| 1306 | status = inl(ioaddr + INTSTAT); |
| 1307 | |
| 1308 | if (status == EpicRemoved) |
| 1309 | return; |
| 1310 | if (status & RxOverflow) /* Missed a Rx frame. */ |
| 1311 | ep->stats.rx_errors++; |
| 1312 | if (status & (RxOverflow | RxFull)) |
| 1313 | outw(RxQueued, ioaddr + COMMAND); |
| 1314 | } |
| 1315 | |
| 1316 | static int epic_poll(struct net_device *dev, int *budget) |
| 1317 | { |
| 1318 | struct epic_private *ep = dev->priv; |
John W. Linville | b7b1d20 | 2005-10-18 21:31:01 -0400 | [diff] [blame] | 1319 | int work_done = 0, orig_budget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | long ioaddr = dev->base_addr; |
| 1321 | |
| 1322 | orig_budget = (*budget > dev->quota) ? dev->quota : *budget; |
| 1323 | |
| 1324 | rx_action: |
| 1325 | |
| 1326 | epic_tx(dev, ep); |
| 1327 | |
John W. Linville | b7b1d20 | 2005-10-18 21:31:01 -0400 | [diff] [blame] | 1328 | work_done += epic_rx(dev, *budget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
| 1330 | epic_rx_err(dev, ep); |
| 1331 | |
| 1332 | *budget -= work_done; |
| 1333 | dev->quota -= work_done; |
| 1334 | |
| 1335 | if (netif_running(dev) && (work_done < orig_budget)) { |
| 1336 | unsigned long flags; |
| 1337 | int more; |
| 1338 | |
| 1339 | /* A bit baroque but it avoids a (space hungry) spin_unlock */ |
| 1340 | |
| 1341 | spin_lock_irqsave(&ep->napi_lock, flags); |
| 1342 | |
| 1343 | more = ep->reschedule_in_poll; |
| 1344 | if (!more) { |
| 1345 | __netif_rx_complete(dev); |
| 1346 | outl(EpicNapiEvent, ioaddr + INTSTAT); |
| 1347 | epic_napi_irq_on(dev, ep); |
| 1348 | } else |
| 1349 | ep->reschedule_in_poll--; |
| 1350 | |
| 1351 | spin_unlock_irqrestore(&ep->napi_lock, flags); |
| 1352 | |
| 1353 | if (more) |
| 1354 | goto rx_action; |
| 1355 | } |
| 1356 | |
| 1357 | return (work_done >= orig_budget); |
| 1358 | } |
| 1359 | |
| 1360 | static int epic_close(struct net_device *dev) |
| 1361 | { |
| 1362 | long ioaddr = dev->base_addr; |
| 1363 | struct epic_private *ep = dev->priv; |
| 1364 | struct sk_buff *skb; |
| 1365 | int i; |
| 1366 | |
| 1367 | netif_stop_queue(dev); |
| 1368 | |
| 1369 | if (debug > 1) |
| 1370 | printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n", |
| 1371 | dev->name, (int)inl(ioaddr + INTSTAT)); |
| 1372 | |
| 1373 | del_timer_sync(&ep->timer); |
| 1374 | |
| 1375 | epic_disable_int(dev, ep); |
| 1376 | |
| 1377 | free_irq(dev->irq, dev); |
| 1378 | |
| 1379 | epic_pause(dev); |
| 1380 | |
| 1381 | /* Free all the skbuffs in the Rx queue. */ |
| 1382 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 1383 | skb = ep->rx_skbuff[i]; |
| 1384 | ep->rx_skbuff[i] = NULL; |
| 1385 | ep->rx_ring[i].rxstatus = 0; /* Not owned by Epic chip. */ |
| 1386 | ep->rx_ring[i].buflength = 0; |
| 1387 | if (skb) { |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1388 | pci_unmap_single(ep->pci_dev, ep->rx_ring[i].bufaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | ep->rx_buf_sz, PCI_DMA_FROMDEVICE); |
| 1390 | dev_kfree_skb(skb); |
| 1391 | } |
| 1392 | ep->rx_ring[i].bufaddr = 0xBADF00D0; /* An invalid address. */ |
| 1393 | } |
| 1394 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 1395 | skb = ep->tx_skbuff[i]; |
| 1396 | ep->tx_skbuff[i] = NULL; |
| 1397 | if (!skb) |
| 1398 | continue; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1399 | pci_unmap_single(ep->pci_dev, ep->tx_ring[i].bufaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | skb->len, PCI_DMA_TODEVICE); |
| 1401 | dev_kfree_skb(skb); |
| 1402 | } |
| 1403 | |
| 1404 | /* Green! Leave the chip in low-power mode. */ |
| 1405 | outl(0x0008, ioaddr + GENCTL); |
| 1406 | |
| 1407 | return 0; |
| 1408 | } |
| 1409 | |
| 1410 | static struct net_device_stats *epic_get_stats(struct net_device *dev) |
| 1411 | { |
| 1412 | struct epic_private *ep = dev->priv; |
| 1413 | long ioaddr = dev->base_addr; |
| 1414 | |
| 1415 | if (netif_running(dev)) { |
| 1416 | /* Update the error counts. */ |
| 1417 | ep->stats.rx_missed_errors += inb(ioaddr + MPCNT); |
| 1418 | ep->stats.rx_frame_errors += inb(ioaddr + ALICNT); |
| 1419 | ep->stats.rx_crc_errors += inb(ioaddr + CRCCNT); |
| 1420 | } |
| 1421 | |
| 1422 | return &ep->stats; |
| 1423 | } |
| 1424 | |
| 1425 | /* Set or clear the multicast filter for this adaptor. |
| 1426 | Note that we only use exclusion around actually queueing the |
| 1427 | new frame, not around filling ep->setup_frame. This is non-deterministic |
| 1428 | when re-entered but still correct. */ |
| 1429 | |
| 1430 | static void set_rx_mode(struct net_device *dev) |
| 1431 | { |
| 1432 | long ioaddr = dev->base_addr; |
| 1433 | struct epic_private *ep = dev->priv; |
| 1434 | unsigned char mc_filter[8]; /* Multicast hash filter */ |
| 1435 | int i; |
| 1436 | |
| 1437 | if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ |
| 1438 | outl(0x002C, ioaddr + RxCtrl); |
| 1439 | /* Unconditionally log net taps. */ |
| 1440 | printk(KERN_INFO "%s: Promiscuous mode enabled.\n", dev->name); |
| 1441 | memset(mc_filter, 0xff, sizeof(mc_filter)); |
| 1442 | } else if ((dev->mc_count > 0) || (dev->flags & IFF_ALLMULTI)) { |
| 1443 | /* There is apparently a chip bug, so the multicast filter |
| 1444 | is never enabled. */ |
| 1445 | /* Too many to filter perfectly -- accept all multicasts. */ |
| 1446 | memset(mc_filter, 0xff, sizeof(mc_filter)); |
| 1447 | outl(0x000C, ioaddr + RxCtrl); |
| 1448 | } else if (dev->mc_count == 0) { |
| 1449 | outl(0x0004, ioaddr + RxCtrl); |
| 1450 | return; |
| 1451 | } else { /* Never executed, for now. */ |
| 1452 | struct dev_mc_list *mclist; |
| 1453 | |
| 1454 | memset(mc_filter, 0, sizeof(mc_filter)); |
| 1455 | for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count; |
| 1456 | i++, mclist = mclist->next) { |
| 1457 | unsigned int bit_nr = |
| 1458 | ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f; |
| 1459 | mc_filter[bit_nr >> 3] |= (1 << bit_nr); |
| 1460 | } |
| 1461 | } |
| 1462 | /* ToDo: perhaps we need to stop the Tx and Rx process here? */ |
| 1463 | if (memcmp(mc_filter, ep->mc_filter, sizeof(mc_filter))) { |
| 1464 | for (i = 0; i < 4; i++) |
| 1465 | outw(((u16 *)mc_filter)[i], ioaddr + MC0 + i*4); |
| 1466 | memcpy(ep->mc_filter, mc_filter, sizeof(mc_filter)); |
| 1467 | } |
| 1468 | return; |
| 1469 | } |
| 1470 | |
| 1471 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) |
| 1472 | { |
| 1473 | struct epic_private *np = dev->priv; |
| 1474 | |
| 1475 | strcpy (info->driver, DRV_NAME); |
| 1476 | strcpy (info->version, DRV_VERSION); |
| 1477 | strcpy (info->bus_info, pci_name(np->pci_dev)); |
| 1478 | } |
| 1479 | |
| 1480 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1481 | { |
| 1482 | struct epic_private *np = dev->priv; |
| 1483 | int rc; |
| 1484 | |
| 1485 | spin_lock_irq(&np->lock); |
| 1486 | rc = mii_ethtool_gset(&np->mii, cmd); |
| 1487 | spin_unlock_irq(&np->lock); |
| 1488 | |
| 1489 | return rc; |
| 1490 | } |
| 1491 | |
| 1492 | static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1493 | { |
| 1494 | struct epic_private *np = dev->priv; |
| 1495 | int rc; |
| 1496 | |
| 1497 | spin_lock_irq(&np->lock); |
| 1498 | rc = mii_ethtool_sset(&np->mii, cmd); |
| 1499 | spin_unlock_irq(&np->lock); |
| 1500 | |
| 1501 | return rc; |
| 1502 | } |
| 1503 | |
| 1504 | static int netdev_nway_reset(struct net_device *dev) |
| 1505 | { |
| 1506 | struct epic_private *np = dev->priv; |
| 1507 | return mii_nway_restart(&np->mii); |
| 1508 | } |
| 1509 | |
| 1510 | static u32 netdev_get_link(struct net_device *dev) |
| 1511 | { |
| 1512 | struct epic_private *np = dev->priv; |
| 1513 | return mii_link_ok(&np->mii); |
| 1514 | } |
| 1515 | |
| 1516 | static u32 netdev_get_msglevel(struct net_device *dev) |
| 1517 | { |
| 1518 | return debug; |
| 1519 | } |
| 1520 | |
| 1521 | static void netdev_set_msglevel(struct net_device *dev, u32 value) |
| 1522 | { |
| 1523 | debug = value; |
| 1524 | } |
| 1525 | |
| 1526 | static int ethtool_begin(struct net_device *dev) |
| 1527 | { |
| 1528 | unsigned long ioaddr = dev->base_addr; |
| 1529 | /* power-up, if interface is down */ |
| 1530 | if (! netif_running(dev)) { |
| 1531 | outl(0x0200, ioaddr + GENCTL); |
| 1532 | outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL); |
| 1533 | } |
| 1534 | return 0; |
| 1535 | } |
| 1536 | |
| 1537 | static void ethtool_complete(struct net_device *dev) |
| 1538 | { |
| 1539 | unsigned long ioaddr = dev->base_addr; |
| 1540 | /* power-down, if interface is down */ |
| 1541 | if (! netif_running(dev)) { |
| 1542 | outl(0x0008, ioaddr + GENCTL); |
| 1543 | outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL); |
| 1544 | } |
| 1545 | } |
| 1546 | |
| 1547 | static struct ethtool_ops netdev_ethtool_ops = { |
| 1548 | .get_drvinfo = netdev_get_drvinfo, |
| 1549 | .get_settings = netdev_get_settings, |
| 1550 | .set_settings = netdev_set_settings, |
| 1551 | .nway_reset = netdev_nway_reset, |
| 1552 | .get_link = netdev_get_link, |
| 1553 | .get_msglevel = netdev_get_msglevel, |
| 1554 | .set_msglevel = netdev_set_msglevel, |
| 1555 | .get_sg = ethtool_op_get_sg, |
| 1556 | .get_tx_csum = ethtool_op_get_tx_csum, |
| 1557 | .begin = ethtool_begin, |
| 1558 | .complete = ethtool_complete |
| 1559 | }; |
| 1560 | |
| 1561 | static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 1562 | { |
| 1563 | struct epic_private *np = dev->priv; |
| 1564 | long ioaddr = dev->base_addr; |
| 1565 | struct mii_ioctl_data *data = if_mii(rq); |
| 1566 | int rc; |
| 1567 | |
| 1568 | /* power-up, if interface is down */ |
| 1569 | if (! netif_running(dev)) { |
| 1570 | outl(0x0200, ioaddr + GENCTL); |
| 1571 | outl((inl(ioaddr + NVCTL) & ~0x003C) | 0x4800, ioaddr + NVCTL); |
| 1572 | } |
| 1573 | |
| 1574 | /* all non-ethtool ioctls (the SIOC[GS]MIIxxx ioctls) */ |
| 1575 | spin_lock_irq(&np->lock); |
| 1576 | rc = generic_mii_ioctl(&np->mii, data, cmd, NULL); |
| 1577 | spin_unlock_irq(&np->lock); |
| 1578 | |
| 1579 | /* power-down, if interface is down */ |
| 1580 | if (! netif_running(dev)) { |
| 1581 | outl(0x0008, ioaddr + GENCTL); |
| 1582 | outl((inl(ioaddr + NVCTL) & ~0x483C) | 0x0000, ioaddr + NVCTL); |
| 1583 | } |
| 1584 | return rc; |
| 1585 | } |
| 1586 | |
| 1587 | |
| 1588 | static void __devexit epic_remove_one (struct pci_dev *pdev) |
| 1589 | { |
| 1590 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1591 | struct epic_private *ep = dev->priv; |
Jeff Garzik | f3b197a | 2006-05-26 21:39:03 -0400 | [diff] [blame] | 1592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | pci_free_consistent(pdev, TX_TOTAL_SIZE, ep->tx_ring, ep->tx_ring_dma); |
| 1594 | pci_free_consistent(pdev, RX_TOTAL_SIZE, ep->rx_ring, ep->rx_ring_dma); |
| 1595 | unregister_netdev(dev); |
| 1596 | #ifndef USE_IO_OPS |
| 1597 | iounmap((void*) dev->base_addr); |
| 1598 | #endif |
| 1599 | pci_release_regions(pdev); |
| 1600 | free_netdev(dev); |
| 1601 | pci_disable_device(pdev); |
| 1602 | pci_set_drvdata(pdev, NULL); |
| 1603 | /* pci_power_off(pdev, -1); */ |
| 1604 | } |
| 1605 | |
| 1606 | |
| 1607 | #ifdef CONFIG_PM |
| 1608 | |
| 1609 | static int epic_suspend (struct pci_dev *pdev, pm_message_t state) |
| 1610 | { |
| 1611 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1612 | long ioaddr = dev->base_addr; |
| 1613 | |
| 1614 | if (!netif_running(dev)) |
| 1615 | return 0; |
| 1616 | epic_pause(dev); |
| 1617 | /* Put the chip into low-power mode. */ |
| 1618 | outl(0x0008, ioaddr + GENCTL); |
| 1619 | /* pci_power_off(pdev, -1); */ |
| 1620 | return 0; |
| 1621 | } |
| 1622 | |
| 1623 | |
| 1624 | static int epic_resume (struct pci_dev *pdev) |
| 1625 | { |
| 1626 | struct net_device *dev = pci_get_drvdata(pdev); |
| 1627 | |
| 1628 | if (!netif_running(dev)) |
| 1629 | return 0; |
| 1630 | epic_restart(dev); |
| 1631 | /* pci_power_on(pdev); */ |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | #endif /* CONFIG_PM */ |
| 1636 | |
| 1637 | |
| 1638 | static struct pci_driver epic_driver = { |
| 1639 | .name = DRV_NAME, |
| 1640 | .id_table = epic_pci_tbl, |
| 1641 | .probe = epic_init_one, |
| 1642 | .remove = __devexit_p(epic_remove_one), |
| 1643 | #ifdef CONFIG_PM |
| 1644 | .suspend = epic_suspend, |
| 1645 | .resume = epic_resume, |
| 1646 | #endif /* CONFIG_PM */ |
| 1647 | }; |
| 1648 | |
| 1649 | |
| 1650 | static int __init epic_init (void) |
| 1651 | { |
| 1652 | /* when a module, this is printed whether or not devices are found in probe */ |
| 1653 | #ifdef MODULE |
| 1654 | printk (KERN_INFO "%s" KERN_INFO "%s" KERN_INFO "%s", |
| 1655 | version, version2, version3); |
| 1656 | #endif |
| 1657 | |
| 1658 | return pci_module_init (&epic_driver); |
| 1659 | } |
| 1660 | |
| 1661 | |
| 1662 | static void __exit epic_cleanup (void) |
| 1663 | { |
| 1664 | pci_unregister_driver (&epic_driver); |
| 1665 | } |
| 1666 | |
| 1667 | |
| 1668 | module_init(epic_init); |
| 1669 | module_exit(epic_cleanup); |