2 drivers/net/tulip/tulip.h
4 Copyright 2000,2001 The Linux Kernel Team
5 Written/copyright 1994-2001 by Donald Becker.
7 This software may be used and distributed according to the terms
8 of the GNU General Public License, incorporated herein by reference.
10 Please refer to Documentation/DocBook/tulip-user.{pdf,ps,html}
11 for more information on this driver.
13 Please submit bugs to http://bugzilla.kernel.org/ .
16 #ifndef __NET_TULIP_H__
17 #define __NET_TULIP_H__
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/spinlock.h>
22 #include <linux/netdevice.h>
23 #include <linux/timer.h>
24 #include <linux/delay.h>
25 #include <linux/pci.h>
28 #include <asm/unaligned.h>
32 /* undefine, or define to various debugging levels (>4 == obscene levels) */
35 #ifdef CONFIG_TULIP_MMIO
36 #define TULIP_BAR 1 /* CBMA */
38 #define TULIP_BAR 0 /* CBIO */
43 struct tulip_chip_table {
46 int valid_intrs; /* CSR7 interrupt enable settings */
48 void (*media_timer) (unsigned long);
49 work_func_t media_task;
55 HAS_MEDIA_TABLE = 0x0002,
56 CSR12_IN_SROM = 0x0004,
57 ALWAYS_CHECK_MII = 0x0008,
59 MC_HASH_ONLY = 0x0020, /* Hash-only multicast filter. */
60 HAS_PNICNWAY = 0x0080,
61 HAS_NWAY = 0x0040, /* Uses internal NWay xcvr. */
62 HAS_INTR_MITIGATION = 0x0100,
65 COMET_MAC_ADDR = 0x0800,
68 HAS_SWAPPED_SEEPROM = 0x4000,
69 NEEDS_FAKE_MEDIA_TABLE = 0x8000,
73 /* chip types. careful! order is VERY IMPORTANT here, as these
74 * are used throughout the driver as indices into arrays */
75 /* Note 21142 == 21143. */
80 DC21142 = 3, DC21143 = 3,
104 /* Offsets to the Command and Status Registers, "CSRs". All accesses
105 must be longword instructions and quadword aligned. */
125 /* register offset and bits for CFDD PCI config reg */
126 enum pci_cfg_driver_reg {
128 CFDD_Sleep = (1 << 31),
129 CFDD_Snooze = (1 << 30),
132 #define RxPollInt (RxIntr|RxNoBuf|RxDied|RxJabber)
134 /* The bits in the CSR5 status registers, mostly interrupt sources. */
137 SystemError = 0x2000,
140 NormalIntr = 0x10000,
141 AbnormalIntr = 0x8000,
146 TxFIFOUnderflow = 0x20,
154 /* bit mask for CSR5 TX/RX process state */
155 #define CSR5_TS 0x00700000
156 #define CSR5_RS 0x000e0000
158 enum tulip_mode_bits {
159 TxThreshold = (1 << 22),
160 FullDuplex = (1 << 9),
162 AcceptBroadcast = 0x0100,
163 AcceptAllMulticast = 0x0080,
164 AcceptAllPhys = 0x0040,
167 RxTx = (TxOn | RxOn),
171 enum tulip_busconfig_bits {
180 /* The Tulip Rx and Tx buffer descriptors. */
181 struct tulip_rx_desc {
189 struct tulip_tx_desc {
193 __le32 buffer2; /* We use only buffer 1. */
197 enum desc_status_bits {
198 DescOwned = 0x80000000,
199 DescWholePkt = 0x60000000,
200 DescEndPkt = 0x40000000,
201 DescStartPkt = 0x20000000,
202 DescEndRing = 0x02000000,
203 DescUseLink = 0x01000000,
206 * Error summary flag is logical or of 'CRC Error', 'Collision Seen',
207 * 'Frame Too Long', 'Runt' and 'Descriptor Error' flags generated
210 RxDescErrorSummary = 0x8000,
211 RxDescCRCError = 0x0002,
212 RxDescCollisionSeen = 0x0040,
215 * 'Frame Too Long' flag is set if packet length including CRC exceeds
216 * 1518. However, a full sized VLAN tagged frame is 1522 bytes
219 * The tulip chip does not block oversized frames, and if this flag is
220 * set on a receive descriptor it does not indicate the frame has been
221 * truncated. The receive descriptor also includes the actual length.
222 * Therefore we can safety ignore this flag and check the length
225 RxDescFrameTooLong = 0x0080,
227 RxDescDescErr = 0x4000,
228 RxWholePkt = 0x00000300,
230 * Top three bits of 14 bit frame length (status bits 27-29) should
231 * never be set as that would make frame over 2047 bytes. The Receive
232 * Watchdog flag (bit 4) may indicate the length is over 2048 and the
233 * length field is invalid.
235 RxLengthOver2047 = 0x38000010
239 enum t21143_csr6_bits {
242 csr6_ign_dest_msb = (1<<26),
244 csr6_scr = (1<<24), /* scramble mode flag: can't be set */
245 csr6_pcs = (1<<23), /* Enables PCS functions (symbol mode requires csr6_ps be set) default is set */
246 csr6_ttm = (1<<22), /* Transmit Threshold Mode, set for 10baseT, 0 for 100BaseTX */
247 csr6_sf = (1<<21), /* Store and forward. If set ignores TR bits */
248 csr6_hbd = (1<<19), /* Heart beat disable. Disables SQE function in 10baseT */
249 csr6_ps = (1<<18), /* Port Select. 0 (defualt) = 10baseT, 1 = 100baseTX: can't be set */
250 csr6_ca = (1<<17), /* Collision Offset Enable. If set uses special algorithm in low collision situations */
251 csr6_trh = (1<<15), /* Transmit Threshold high bit */
252 csr6_trl = (1<<14), /* Transmit Threshold low bit */
254 /***************************************************************
255 * This table shows transmit threshold values based on media *
256 * and these two registers (from PNIC1 & 2 docs) Note: this is *
257 * all meaningless if sf is set. *
258 ***************************************************************/
260 /***********************************
261 * (trh,trl) * 100BaseTX * 10BaseT *
262 ***********************************
265 * (1,0) * 512 * 128 *
266 * (1,1) * 1024 * 160 *
267 ***********************************/
269 csr6_fc = (1<<12), /* Forces a collision in next transmission (for testing in loopback mode) */
270 csr6_om_int_loop = (1<<10), /* internal (FIFO) loopback flag */
271 csr6_om_ext_loop = (1<<11), /* external (PMD) loopback flag */
272 /* set both and you get (PHY) loopback */
273 csr6_fd = (1<<9), /* Full duplex mode, disables hearbeat, no loopback */
274 csr6_pm = (1<<7), /* Pass All Multicast */
275 csr6_pr = (1<<6), /* Promiscuous mode */
276 csr6_sb = (1<<5), /* Start(1)/Stop(0) backoff counter */
277 csr6_if = (1<<4), /* Inverse Filtering, rejects only addresses in address table: can't be set */
278 csr6_pb = (1<<3), /* Pass Bad Frames, (1) causes even bad frames to be passed on */
279 csr6_ho = (1<<2), /* Hash-only filtering mode: can't be set */
280 csr6_hp = (1<<0), /* Hash/Perfect Receive Filtering Mode: can't be set */
282 csr6_mask_capture = (csr6_sc | csr6_ca),
283 csr6_mask_defstate = (csr6_mask_capture | csr6_mbo),
284 csr6_mask_hdcap = (csr6_mask_defstate | csr6_hbd | csr6_ps),
285 csr6_mask_hdcaptt = (csr6_mask_hdcap | csr6_trh | csr6_trl),
286 csr6_mask_fullcap = (csr6_mask_hdcaptt | csr6_fd),
287 csr6_mask_fullpromisc = (csr6_pr | csr6_pm),
288 csr6_mask_filters = (csr6_hp | csr6_ho | csr6_if),
289 csr6_mask_100bt = (csr6_scr | csr6_pcs | csr6_hbd),
293 /* Keep the ring sizes a power of two for efficiency.
294 Making the Tx ring too large decreases the effectiveness of channel
295 bonding and packet priority.
296 There are no ill effects from too-large receive rings. */
298 #define TX_RING_SIZE 32
299 #define RX_RING_SIZE 128
300 #define MEDIA_MASK 31
302 /* The receiver on the DC21143 rev 65 can fail to close the last
303 * receive descriptor in certain circumstances (see errata) when
304 * using MWI. This can only occur if the receive buffer ends on
305 * a cache line boundary, so the "+ 4" below ensures it doesn't.
307 #define PKT_BUF_SZ (1536 + 4) /* Size of each temporary Rx buffer. */
309 #define TULIP_MIN_CACHE_LINE 8 /* in units of 32-bit words */
311 #if defined(__sparc__) || defined(__hppa__)
312 /* The UltraSparc PCI controllers will disconnect at every 64-byte
313 * crossing anyways so it makes no sense to tell Tulip to burst
314 * any more than that.
316 #define TULIP_MAX_CACHE_LINE 16 /* in units of 32-bit words */
318 #define TULIP_MAX_CACHE_LINE 32 /* in units of 32-bit words */
322 /* Ring-wrap flag in length field, use for last ring entry.
323 0x01000000 means chain on buffer2 address,
324 0x02000000 means use the ring start address in CSR2/3.
325 Note: Some work-alike chips do not function correctly in chained mode.
326 The ASIX chip works only in chained mode.
327 Thus we indicates ring mode, but always write the 'next' field for
328 chained mode as well.
330 #define DESC_RING_WRAP 0x02000000
333 #define EEPROM_SIZE 512 /* 2 << EEPROM_ADDRLEN */
336 #define RUN_AT(x) (jiffies + (x))
338 #define get_u16(ptr) get_unaligned_le16((ptr))
343 unsigned char *leafdata;
350 u8 csr12dir; /* General purpose pin directions. */
352 unsigned has_nonmii:1;
353 unsigned has_reset:6;
355 u32 csr15val; /* 21143 NWay setting. */
356 struct medialeaf mleaf[0];
361 struct mediainfo *next;
373 struct tulip_private {
374 const char *product_name;
375 struct net_device *next_module;
376 struct tulip_rx_desc *rx_ring;
377 struct tulip_tx_desc *tx_ring;
378 dma_addr_t rx_ring_dma;
379 dma_addr_t tx_ring_dma;
380 /* The saved address of a sent-in-place packet/buffer, for skfree(). */
381 struct ring_info tx_buffers[TX_RING_SIZE];
382 /* The addresses of receive-in-place skbuffs. */
383 struct ring_info rx_buffers[RX_RING_SIZE];
384 u16 setup_frame[96]; /* Pseudo-Tx frame to init address table. */
388 struct napi_struct napi;
389 struct net_device_stats stats;
390 struct timer_list timer; /* Media selection timer. */
391 struct timer_list oom_timer; /* Out of memory timer. */
395 unsigned int cur_rx, cur_tx; /* The next free ring entry */
396 unsigned int dirty_rx, dirty_tx; /* The ring entries to be free()ed. */
398 #ifdef CONFIG_TULIP_NAPI_HW_MITIGATION
401 unsigned int full_duplex:1; /* Full-duplex operation requested. */
402 unsigned int full_duplex_lock:1;
403 unsigned int fake_addr:1; /* Multiport board faked address. */
404 unsigned int default_port:4; /* Last dev->if_port value. */
405 unsigned int media2:4; /* Secondary monitored media port. */
406 unsigned int medialock:1; /* Don't sense media type. */
407 unsigned int mediasense:1; /* Media sensing in progress. */
408 unsigned int nway:1, nwayset:1; /* 21143 internal NWay. */
409 unsigned int timeout_recovery:1;
410 unsigned int csr0; /* CSR0 setting. */
411 unsigned int csr6; /* Current CSR6 control settings. */
412 unsigned char eeprom[EEPROM_SIZE]; /* Serial EEPROM contents. */
413 void (*link_change) (struct net_device * dev, int csr5);
414 u16 sym_advertise, mii_advertise; /* NWay capabilities advertised. */
415 u16 lpar; /* 21143 Link partner ability. */
417 signed char phys[4], mii_cnt; /* MII device addresses. */
418 struct mediatable *mtable;
419 int cur_index; /* Current media index. */
421 struct pci_dev *pdev;
425 void __iomem *base_addr;
427 int pad0; /* Used for 8-byte alignment */
428 struct work_struct media_work;
429 struct net_device *dev;
433 struct eeprom_fixup {
438 u16 newtable[32]; /* Max length below. */
443 extern u16 t21142_csr14[];
444 void t21142_media_task(struct work_struct *work);
445 void t21142_start_nway(struct net_device *dev);
446 void t21142_lnk_change(struct net_device *dev, int csr5);
450 void pnic2_lnk_change(struct net_device *dev, int csr5);
451 void pnic2_timer(unsigned long data);
452 void pnic2_start_nway(struct net_device *dev);
453 void pnic2_lnk_change(struct net_device *dev, int csr5);
456 void tulip_parse_eeprom(struct net_device *dev);
457 int tulip_read_eeprom(struct net_device *dev, int location, int addr_len);
460 extern unsigned int tulip_max_interrupt_work;
461 extern int tulip_rx_copybreak;
462 irqreturn_t tulip_interrupt(int irq, void *dev_instance);
463 int tulip_refill_rx(struct net_device *dev);
464 #ifdef CONFIG_TULIP_NAPI
465 int tulip_poll(struct napi_struct *napi, int budget);
470 int tulip_mdio_read(struct net_device *dev, int phy_id, int location);
471 void tulip_mdio_write(struct net_device *dev, int phy_id, int location, int value);
472 void tulip_select_media(struct net_device *dev, int startup);
473 int tulip_check_duplex(struct net_device *dev);
474 void tulip_find_mii (struct net_device *dev, int board_idx);
477 void pnic_do_nway(struct net_device *dev);
478 void pnic_lnk_change(struct net_device *dev, int csr5);
479 void pnic_timer(unsigned long data);
482 void tulip_media_task(struct work_struct *work);
483 void mxic_timer(unsigned long data);
484 void comet_timer(unsigned long data);
487 extern int tulip_debug;
488 extern const char * const medianame[];
489 extern const char tulip_media_cap[];
490 extern struct tulip_chip_table tulip_tbl[];
491 void oom_timer(unsigned long data);
492 extern u8 t21040_csr13[];
494 static inline void tulip_start_rxtx(struct tulip_private *tp)
496 void __iomem *ioaddr = tp->base_addr;
497 iowrite32(tp->csr6 | RxTx, ioaddr + CSR6);
499 (void) ioread32(ioaddr + CSR6); /* mmio sync */
502 static inline void tulip_stop_rxtx(struct tulip_private *tp)
504 void __iomem *ioaddr = tp->base_addr;
505 u32 csr6 = ioread32(ioaddr + CSR6);
509 iowrite32(csr6 & ~RxTx, ioaddr + CSR6);
511 /* wait until in-flight frame completes.
512 * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
513 * Typically expect this loop to end in < 50 us on 100BT.
515 while (--i && (ioread32(ioaddr + CSR5) & (CSR5_TS|CSR5_RS)))
519 printk(KERN_DEBUG "%s: tulip_stop_rxtx() failed"
520 " (CSR5 0x%x CSR6 0x%x)\n",
522 ioread32(ioaddr + CSR5),
523 ioread32(ioaddr + CSR6));
527 static inline void tulip_restart_rxtx(struct tulip_private *tp)
531 tulip_start_rxtx(tp);
534 static inline void tulip_tx_timeout_complete(struct tulip_private *tp, void __iomem *ioaddr)
536 /* Stop and restart the chip's Tx processes. */
537 tulip_restart_rxtx(tp);
538 /* Trigger an immediate transmit demand. */
539 iowrite32(0, ioaddr + CSR1);
541 tp->stats.tx_errors++;
544 #endif /* __NET_TULIP_H__ */